High temperature gas discharge device

Abstract

The present invention provides a high-temperature gas discharge device, which is used to discharge the high-temperature exhaust gas that needs to be output by the thermal analyzer to the outside, including: an adjustable lifting base; an air duct fixed on the adjustable lifting base, one end of the air duct is connected to the air outlet of the thermal analyzer through a first connector, and the other end is connected to the outside through a second connector, the first connector is made of shape memory alloy and prepared by 3D printing combined with a heat treatment process, the first connector is a double-layer sleeve structure, and the inner and outer sleeves are connected by a number of circumferentially distributed radial connecting blocks; a heat dissipation pipeline is wound on the outer wall of the air duct, and the heat dissipation pipeline is connected to a fan or a heat dissipation liquid pump. The present invention can discharge the high-temperature gas that needs to be output by the thermal analyzer to the outside, protect the safety of people and items in the room, and at the same time, the joint connected to the thermal analyzer is designed in a targeted manner to ensure air tightness and heat resistance.

Description

Technical Field

[0001] The invention relates to the field of thermal analysis, and in particular to a high-temperature gas exhaust device. Background Art

[0002] Thermogravimetric analysis (TG) is a method for observing the mass of a sample as a function of temperature or time under program-controlled temperature. TGA technology is widely used in research and development, process optimization and quality control in various fields such as plastics, rubber, coatings, pharmaceuticals, catalysts, inorganic materials, metal materials and composite materials.

[0003] Thermal analyzers are usually placed indoors to test samples. The operating temperature of the equipment can reach thousands of degrees, and high-temperature gases are generated during operation. Under current technology, the high-temperature gases generated by thermal analyzers are directly discharged into the room, which will cause certain harm to the indoor environment. In particular, some organic samples have different chemical compositions and produce different types of toxic gases when burned: (1) The toxic gas produced by the combustion of plastics based on C, H or C, H, O is carbon monoxide; (2) Nitrogen-containing plastics such as melamine formaldehyde and polyurethane can produce toxic gases such as carbon monoxide and nitrogen oxides as well as highly toxic gas hydrogen cyanide when burned; (3) Chlorine-containing plastics such as polyvinyl chloride will produce hydrogen chloride gas when in flames or overheated. When the concentration reaches a toxic level, it will make people feel unbearable and even die. Moreover, hydrogen chloride will form hydrochloric acid when it meets water, which is corrosive to equipment; (4) Fluorine-containing plastics such as polytetrafluoroethylene will release hydrogen fluoride gas when overheated under fire conditions. This gas is corrosive and toxic. At the same time, since the high-temperature gas generated by the thermal analyzer can reach thousands of degrees, if it needs to be discharged outdoors, then some higher requirements are also placed on the heat resistance of the export device. Summary of the invention

[0004] The present invention provides a high-temperature gas exhaust device, which can exhaust the high-temperature gas generated by the thermal analyzer during operation to the outside of the room. At the same time, the device has good high-temperature resistance and can meet the requirements of continuous operation in a high-temperature environment. The specific scheme is as follows:

[0005] A high-temperature gas exhaust device, the high-temperature gas exhaust device is used to discharge the gas output by the thermal analyzer to the outside, the high-temperature gas exhaust device comprises:

[0006] Adjustable lifting base;

[0007] An air duct is fixed on the adjustable lifting base, one end of the air duct is connected to the air outlet of the thermal synchronous thermal analyzer through a first connector, and the other end is connected to the outside through a second connector, the first connector is made of shape memory alloy and is prepared by 3D printing combined with a heat treatment process, the first connector is a double-layer sleeve structure, and the inner and outer sleeves are connected by a plurality of circumferentially distributed radial connecting blocks;

[0008] The heat dissipation pipeline is wound around the outer wall of the air guide pipe, and the heat dissipation pipeline is connected to a fan or a heat dissipation liquid pump.

[0009] Further, on the axis of the first connector, the air intake direction is set as the X direction;

[0010] Wherein, a trumpet-shaped card opening is provided at one end of the first connector connected to the air outlet of the thermal synchronous thermal analyzer, and the opening width of the trumpet-shaped card opening gradually decreases in the X direction;

[0011] The other end of the first connector is truncated cone-shaped and its width gradually decreases in the X direction. The inner sleeve end surface of the other end of the first connector is provided with a straight edge perpendicular to the axis and extending outward, and the straight edge is connected to the outer sleeve through the truncated cone bevel.

[0012] Furthermore, the angle between the inclined surface of the trumpet-shaped opening and the side wall of the inner sleeve of the first connector is 15°-45°, and the acute angle between the inclined surface of the truncated cone and the straight edge is 1°-9°.

[0013] Furthermore, the gap between the inner and outer sleeves of the first connector is 0.6-1.5 mm.

[0014] Furthermore, the first connector is printed using Ni-Ti shape memory alloy, and the inner wall has a rough surface.

[0015] Furthermore, the adjustable lifting base includes a support platform and a plurality of screw rods threadedly matched with the support platform, wherein the screw rods are distributed at four corners of the support platform, and each screw rod is driven to rotate by a servo motor.

[0016] Furthermore, the diameter of the heat dissipation pipeline is 3-8 mm, and the number of spiral turns is between 5-14 turns;

[0017] The heat dissipation pipeline is tightly fitted with the air guide pipe, and the outer wall of the air guide pipe is coated with heat conductive glue.

[0018] Furthermore, the air guide tube is connected to the second connector via a gas transmission component, and the gas transmission component is a 90° elbow with a processed inner wall, an inner diameter of 3-10 mm, and a rough inner wall surface.

[0019] Furthermore, the second connector is connected to the airway tube using a hose interface;

[0020] The airway tube is made of polytetrafluoroethylene tube or silicone tube.

[0021] Furthermore, the air duct and the heat dissipation component are both installed in a shell, and the shell is fixed on an adjustable lifting base.

[0022] The high-temperature gas discharge device provided by the present invention has the following technical advantages:

[0023] 1) The high-temperature gas generated by the thermal analyzer can be discharged to the outside to protect the safety of people and objects indoors.

[0024] 2) The design of the liftable base can adapt to instruments of various heights;

[0025] 3) A spiral heat dissipation pipe is used to dissipate heat from the air guide pipe. Gas or liquid can be introduced into the spiral heat dissipation pipe for heat dissipation, and the heat dissipation effect is good;

[0026] 4) The first connector is made of memory alloy, with a trumpet-shaped opening at the front and a round table at the rear, ensuring the airtightness of the connection between the front and rear ends;

[0027] 5) A bend is provided at the outlet end of the air guide pipe, and the inner wall of the bend has a rough surface, which makes it easier for the exhaust gas to form turbulence during the transportation process, making the heat exchange more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1-2 A three-dimensional diagram of a high-temperature gas exhaust device provided by the present invention;

[0030] Figure 3 is a cross-sectional view of a high temperature gas exhaust device;

[0031] Figure 4 is a cross-sectional view of the first connector in the length direction;

[0032] Figure 5 is a cross-sectional view of the first connector. DETAILED DESCRIPTION

[0033] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0034] In order to fully understand the present invention, detailed steps and detailed structures will be proposed in the following description to illustrate the technical solution of the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0035] A high-temperature gas exhaust device is used to discharge the gas output by the thermal analyzer to the outside, and the high-temperature gas exhaust device includes:

[0036] Adjustable lifting base;

[0037] The air duct is fixed on the adjustable lifting base, one end of the air duct is connected to the air outlet of the thermal synchronous thermal analyzer through the first connector 1, and the other end is connected to the outside through the second connector 5. The first connector 1 is made of shape memory alloy and is prepared by 3D printing combined with heat treatment process. The first connector 1 is a double-layer sleeve structure (including an outer sleeve 10 and an inner sleeve 11), and the inner and outer sleeves are connected by a plurality of circumferentially distributed radial connecting blocks 15;

[0038] The heat dissipation pipeline 3 is wound around the outer wall of the air guide pipe, and the heat dissipation pipeline is connected to a fan or a heat dissipation liquid pump.

[0039] Figure 5 The figure shows a cross-sectional view of the first connector 1. As can be seen from the figure, the first connector 1 can be regarded as being composed of a plurality of circumferentially distributed I-shaped structures 100. The structure is integrally prepared by a 3D metal printing process.

[0040] like Figure 4 As shown, on the axis of the first connector 1, the air inlet direction is set as the X direction. Among them, a trumpet-shaped card opening 20 is provided at one end of the first connector 1 connected to the air outlet of the thermal synchronous thermal analyzer, and the opening width of the trumpet-shaped card opening 20 gradually decreases in the X direction. Among them, the other end of the first connector 1 is truncated cone-shaped and its width gradually decreases in the X direction, and the end face of the inner sleeve at the other end of the first connector 1 is provided with a straight edge 14 perpendicular to the axis and extending outward, and the straight edge 14 is connected to the outer sleeve through the truncated cone-shaped hypotenuse 13. With this design, after thermal expansion, the front end of the first connector 1 is sealed and connected to the exhaust port of the thermal synchronous thermal analyzer, while ensuring close contact between the rear end and the air guide tube.

[0041] Optionally, the angle α between the inclined surface 12 of the trumpet-shaped opening 20 and the inner sleeve side wall of the first connector 1 is 15°-45° (preferably 30°), and the acute angle β between the truncated cone-shaped inclined surface and the straight edge is 1°-9° (preferably 5°).

[0042] The gap between the inner and outer sleeves of the first connector 1 is 0.6-1.5 mm. The first connector 1 is printed with Ni-Ti shape memory alloy, and the inner wall is a rough surface, which improves the stability of contact with the ceramic outlet of the thermal synchronous thermal analyzer after thermal expansion.

[0043] In an optional embodiment, the adjustable lifting base includes a support platform 4a and a plurality of screw rods 4b threadedly matched with the support platform 4a, the screw rods 4b are distributed at the four corners of the support platform 4a, and each screw rod 4b is driven to rotate by a servo motor. Through a multi-point screw fine-tuning device, the device can be adjusted up and down to adapt to instruments of various heights.

[0044] In an optional embodiment, the diameter of the heat dissipation pipeline 3 is 3-8 mm, and the number of spiral turns is between 5 and 14. Further preferably, the heat dissipation pipeline 3 is tightly fitted with the air duct 6, and the outer wall of the air duct 6 is coated with thermal conductive glue to increase heat exchange efficiency.

[0045] In an optional embodiment, the air duct 6 is connected to the second connector 5 through a gas transfer component 2. The gas transfer component 2 is a 90° elbow with a treated inner wall and an inner diameter of 3-10 mm. The inner wall is roughened by coarse sandblasting or liquid rough grinding to obtain a rough surface with relatively uniform roughness.

[0046] In an optional embodiment, the second connector 5 is connected to the gas transfer component 2 using a hose interface (such as a pagoda interface).

[0047] In an optional embodiment, the air guide pipe 6 is made of a high temperature resistant material such as a polytetrafluoroethylene tube or a silicone tube to guide the gas out of the room.

[0048] In an optional embodiment, the air duct 6 and the heat dissipation component 3 are both installed in a shell 7, and the shell is fixed on a support platform 4a of an adjustable lifting base. A support block 8 is arranged on the support platform 4a to lift the shell 7.

[0049] When in use, the ceramic outlet of the thermal analyzer is inserted into the first connector 1 , and the other end of the first connector 1 is inserted into the air guide tube 6 .

[0050] In order to achieve a better seal at the outlet, the first connector 1 is made of shape memory alloy (Ni-Ti) and is manufactured by 3D printing + heat treatment. The first connector 1 is a double-layer sleeve structure (if necessary, high-temperature sealing fillers such as asbestos can be added between the double-layer sleeves). When the experiment starts, the temperature of the ceramic tube rises, and the memory alloy immediately expands due to the heat. The I-shaped structure 100 opens, contacts the ceramic outlet of the thermal synchronous thermal analyzer and fits tightly. The middle elastic vertical plate of the I-shaped is designed to have a width of 0.6-1.5mm to ensure that the structural design stretch is 0.1-0.5mm, providing a margin for the material to expand due to heat.

[0051] The high-temperature gas discharge device provided by the present invention has the following technical advantages:

[0052] 1) The high-temperature gas generated by the thermal analyzer can be discharged to the outside to protect the safety of people and objects indoors.

[0053] 2) The design of the liftable base can adapt to instruments of various heights;

[0054] 3) A spiral heat dissipation pipe is used to dissipate heat from the air guide pipe. Gas or liquid can be introduced into the spiral heat dissipation pipe for heat dissipation, and the heat dissipation effect is good;

[0055] 4) The first connector is made of memory alloy, with a trumpet-shaped opening at the front and a round table at the rear, ensuring the airtightness of the connection between the front and rear ends;

[0056] 5) A bend is provided at the outlet end of the air guide pipe, and the inner wall of the bend has a rough surface, which makes it easier for the exhaust gas to form turbulence during the transportation process, making the heat exchange more uniform.

[0057] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A high temperature gas discharge device, characterized in that: The high-temperature gas exhaust device is used to export the high-temperature gas required to be output by the thermal analyzer to the outside of the room, and the high-temperature gas exhaust device includes: Adjustable lifting base; An air duct fixed on the adjustable lifting base, one end of the air duct being connected to the air outlet of the thermal synchronous thermal analyzer via a first connector (1), and the other end being connected to the outside via a second connector (5), the first connector (1) being made of shape memory alloy and prepared by 3D printing combined with a heat treatment process, the first connector (1) being a double-layer sleeve structure, and the inner and outer sleeves being connected via a plurality of circumferentially distributed radial connecting blocks, the first connector (1) being printed using a Ni-Ti shape memory alloy, and the inner wall being a rough surface, and the inner wall of the air duct being a rough surface; A heat dissipation pipeline, wound around the outer wall of the air guide pipe, the heat dissipation pipeline is connected to a fan or a heat dissipation liquid pump; On the axis of the first connector (1), the air inlet direction is set as the X direction; wherein, a trumpet-shaped card opening is provided at one end of the first connector (1) connected to the air outlet of the thermal synchronous thermal analyzer, and the opening width of the trumpet-shaped card opening gradually decreases in the X direction; the other end of the first connector (1) is in a truncated cone shape and its width gradually decreases in the X direction, and the end face of the inner sleeve at the other end of the first connector (1) is provided with a straight edge perpendicular to the axis and extending outward, and the straight edge is connected to the outer sleeve through the oblique edge of the truncated cone.

2. The high temperature gas exhaust device according to claim 1, characterized in that: The angle between the inclined surface of the trumpet-shaped opening and the side wall of the inner sleeve of the first connector (1) is 15°-45°, and the acute angle between the inclined surface of the truncated cone and the straight edge is 1°-9°.

3. The high temperature gas exhaust device according to claim 1, characterized in that: The gap between the inner and outer sleeves of the first connector (1) is 0.6-1.5 mm.

4. The high temperature gas exhaust device according to claim 1, characterized in that: The adjustable lifting base includes a support platform and a plurality of screw rods threadedly matched with the support platform. The screw rods are distributed at the four corners of the support platform. Each screw rod adopts a manual precision adjustment structure or is driven by a precision servo motor to rotate and adjust.

5. The high temperature gas exhaust device according to claim 1, characterized in that: The diameter of the heat dissipation pipeline is 3-8 mm, and the number of spiral turns is between 5-14 turns; The heat dissipation pipeline is tightly fitted with the air guide pipe, and the outer wall of the air guide pipe is coated with heat conductive glue.

6. The high temperature gas exhaust device according to claim 1, characterized in that: The air guide tube is connected to the second connector (5) via a gas transmission component (2). The gas transmission component (2) is a 90° elbow with a processed inner wall and an inner diameter of 3-10 mm.

7. The high temperature gas exhaust device according to claim 6, characterized in that: The second connector (5) is connected to the airway tube by means of a hose interface; The airway tube is made of polytetrafluoroethylene tube or silicone tube.

8. The high temperature gas exhaust device according to claim 1, characterized in that: The air guide pipe and the heat dissipation component (3) are both installed in a shell, and the shell is fixed on an adjustable lifting base.

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