Reaction kettle for MDI derivation test
By incorporating a concave-convex structure and heating device into the reactor wall, combined with a rotation and limiting ring design, the problems of sealing and uneven temperature in traditional reactors were solved, thus ensuring the safety and data accuracy of MDI derivation experiments.
Patent Information
- Application Number
- CN202520141719.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Traditional reactors used in MDI derivatization experiments have stirring devices that affect sealing, leading to the risk of gas leakage and uneven temperature of reactants, which affects the accuracy of experimental data.
A reaction vessel without an external stirring device is designed. By setting concave and convex structures and a heating device on the vessel wall, the internal liquid is uniformly mixed and heated by the rotation and the guiding effect of the convex parts. Combined with the fixing ring and clamping plate, the sealing and safety are ensured.
This achieved uniform temperature inside the reactor, reduced the risk of gas leakage, and improved experimental safety and data accuracy.
Smart Images
Figure CN223732781U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a reaction vessel for MDI derivative experiments, belonging to the field of experimental equipment technology. Background Technology
[0002] MDI derivatization experiments refer to experiments that convert 4,4'-diphenylmethane diisocyanate (MDI) into other compounds or perform structural analysis through chemical reactions. MDI is an important chemical raw material widely used in the manufacture of polyurethane products, such as foam materials, elastomers, coatings, and adhesives. MDI derivatization experiments typically refer to the research and experiments on various chemical reactions or derivatives based on MDI, in order to develop new materials or optimize existing products.
[0003] In MDI derivatization experiments, a reaction vessel is required to control the temperature and pressure environment of MDI to ensure that the actual derivatization conditions match the set derivatization environment. In derivatization experiments, MDI and its derivatives are toxic and flammable chemicals. Therefore, it is necessary to pay attention to the good sealing of the reaction vessel during the actual reaction process. In order to achieve temperature uniformity, traditional reaction vessels usually have an internal stirring mechanism to make the internal reaction mixture heat evenly. However, external stirring devices are prone to gaps at the assembly position, affecting the sealing effect. If the stirring device is removed, poor heating may occur inside the reaction vessel, resulting in significant local temperature differences in the reaction mixture, which affects the actual measurement and the accuracy of the test data. Summary of the Invention
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a reaction vessel for MDI derivatization experiments, which can improve the uniform heating effect of reactants in MDI derivatization experiments, eliminate the need for an external stirring device to be inserted into the reaction vessel, and reduce the possibility of gas leakage and potential dangerous situations.
[0005] To achieve the above objectives, this utility model employs the following technical solution:
[0006] The present invention provides a reaction vessel for MDI derivatization experiments, including a frame and a rotating platform rotatably mounted on the frame. The reaction vessel is fixedly mounted on the rotating platform, and a drive device for driving the rotating platform to rotate is also installed on the frame.
[0007] The reaction kettle is in a hollow cylinder shape as a whole, and a plurality of notches recessed to the inside of the reaction kettle are arranged on the outer wall surface of the reaction kettle, the notches are in the form of protrusions in the inside of the reaction kettle, the protrusions comprise a first inclined surface connected with the outer wall of the reaction kettle and a second inclined surface, the included angle between the first inclined surface and the tangent line of the connection point between the first inclined surface and the inner wall of the reaction kettle is arranged as an obtuse angle, and the included angle between the second inclined surface and the tangent line of the connection point between the second inclined surface and the inner wall of the reaction kettle is not greater than 90°.
[0008] The heating device is arranged in the notch and is used for heating the protruding surface of the protrusion in the inside of the reaction kettle.
[0009] Specifically, the heating device comprises a special-shaped block and a heating plate fixed on one side of the special-shaped block, the special-shaped block is used for being embedded in the inside of the notch of the reaction kettle, and the heating plate is used for heating the first inclined surface and / or the second inclined surface of the protrusion.
[0010] Specifically, the shape and size of the special-shaped block meet the requirement that the outer edge of the special-shaped block is not recessed in the outer wall of the reaction kettle after the special-shaped block is embedded.
[0011] Specifically, the outer wall of the reaction kettle is sleeved with a limiting ring, a positioning plate is mounted on the reaction kettle, a limiting piece for positioning the limiting ring is arranged on the positioning plate, and the limiting ring can bind the special-shaped block on the reaction kettle.
[0012] Specifically, the protrusions are arranged in a circumferential array on the inner wall of the reaction kettle.
[0013] Specifically, a plurality of mounting plates are fixedly mounted on the rotating table, a clamping plate capable of approaching or moving away from the reaction kettle is slidably arranged on the mounting plate, and a locking piece for driving the clamping plate to clamp the reaction kettle is further arranged on the mounting plate.
[0014] Specifically, a mounting opening is arranged on the reaction kettle, an observation window is sealingly mounted at the position of the mounting opening, and the observation window is made of transparent material.
[0015] Specifically, a temperature sensor for detecting the temperature in the inside of the reaction kettle and a pressure sensor for detecting the pressure in the inside of the reaction kettle are further arranged on the reaction kettle.
[0016] Compared with the prior art, the present application has the following beneficial effects:
[0017] The wall surface of the reaction kettle is specially designed, the protrusion of the inner wall of the reaction kettle can guide and stir the liquid in the inside of the reaction kettle during rotation, the solution after heating can be uniformly mixed with the remaining solution, the temperature consistency is ensured, the reaction kettle itself does not need an external stirring mechanism, the possibility of reaction gas leakage is reduced, and the safe test environment is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a whole structure schematic view of a reaction kettle provided by the embodiment of the utility model;
[0019] Figure 2 is a front view of a reaction kettle provided by the embodiment of the utility model;
[0020] Figure 3 is a whole structure schematic view of a reaction kettle provided by the embodiment of the utility model; Figure 2 is an A-A direction section view of a reaction kettle provided by the embodiment of the utility model;
[0021] Figure 4 is a B-B direction section view of a reaction kettle provided by the embodiment of the utility model; Figure 2
[0022] Figure 5 is a side view of a reaction kettle provided by the embodiment of the utility model;
[0023] Figure 6 is a C-C direction section view of a reaction kettle provided by the embodiment of the utility model; Figure 5
[0024] Reference signs: 1, rack; 2, rotating table; 3, reaction kettle; 4, heating device; 401, special-shaped block; 402, heating plate; 5, driving device; 6, positioning plate; 7, limiting piece; 8, limiting ring; 9, mounting plate; 10, clamping plate; 11, locking piece. DETAILED DESCRIPTION
[0025] The utility model will be further described below in combination with the drawings. The following embodiments are only used for more clearly illustrating the technical scheme of the utility model, and cannot be used to limit the protection scope of the utility model.
[0026] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.
[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example:
[0028] This utility model provides an MDI derivatization test reactor, used to improve the uniform heating effect of reactants in MDI derivatization experiments. It eliminates the need for an external stirring device inserted into the reactor, reducing the risk of leakage and potential hazards. To achieve the device's structural function, it includes a frame 1 and a rotating platform 2 rotatably mounted on the frame 1. The reactor 3 is fixedly mounted on the rotating platform 2. To ensure mixing and agitation of the liquid inside the reactor 3, a drive device 5 for rotating the rotating platform 2 is also installed on the frame 1. The reactor 3 is a hollow cylinder. To ensure uniform mixing of the liquid during rotation, the outer wall of the reactor 3 has several recesses that curve inwards into the reactor 3. These recesses appear as protrusions inside the reactor 3. Figure 4 As shown, the protrusion here includes a first inclined surface and a second inclined surface connected to the outer wall of the reactor 3. The angle between the first inclined surface and the tangent at the connection point with the inner wall of the reactor 3 is obtuse, and the angle between the second inclined surface and the tangent at the connection point with the inner wall of the reactor 3 is no greater than 90°. Figure 4 For example, when mixing solutions, the reactor 3 first rotates clockwise and then stops momentarily. The mixed liquid in the reactor 3 moves towards the central region of the reactor 3 through the first inclined plane, while the fluid originally located in the central region flows towards the angle position of the second inclined plane, realizing local circulation of the liquid inside the reactor 3. The driving device 5 can be driven by a motor for reciprocating drive, and the liquid is stirred and mixed by providing different accelerations. In order to achieve uniform mixing and heating of the liquid inside the reactor 3, a heating device 4 is set in the recess. The heating device 4 is used to heat the raised surface of the raised part inside the reactor 3. Through the above-mentioned local circulation of the liquid, that is, the heated part of the liquid can flow towards the central position of the reactor 3 during the circulation process, while the unheated liquid originally located in the central part can flow towards the raised surface (i.e., the heating part), realizing the convergence of hot and cold mixed liquids, which is beneficial to enhance the uniform heat exchange inside the reactor 3 and ensure the uniformity of the internal temperature of the reactor 3. The stirring process does not require external insertion of a stirring device into the reactor 3, resulting in a good sealing effect and improving the safety of the experimental operation.
[0029] The utility model embodiment provides a kind of reaction kettle for MDI derivative test, specifically provides the structure of heating device 4, specifically, heating device 4 is set here including special-shaped block 401 and the heating plate 402 fixed in the side of special-shaped block 401, the special-shaped block 401 is used to be embedded in the inside of the notch of reaction kettle 3, and the heating plate 402 is used to heat the first inclined plane and / or second inclined plane of protruding portion, as a preferred embodiment, protruding portion can be arranged in circumferential array distribution and set in the inner wall of reaction kettle 3, the heating surface of heating plate 402 can be effectively promoted at this time, it is favorable to carry out low-power heating while guaranteeing reaction speed, avoid the emergence of the situation that local temperature is too high to influence test result.
[0030] The utility model embodiment provides a kind of reaction kettle for MDI derivative test, to prevent special-shaped block 401 from being spun out after embedding installation, in addition to other basic bolt fixing mode, the shape and size of special-shaped block 401 in device can be set to meet that the outer edge of special-shaped block 401 is not recessed in the outer wall of reaction kettle 3 after embedding is completed (that is, the outer edge position is matched with the outer edge of reaction kettle 3 or protrudes from the outer edge of reaction kettle 3), and limiting ring 8 is sleeved on the outer wall of reaction kettle 3, as shown in Figure 1 Limiting ring 8 can bind special-shaped block 401 on reaction kettle 3, to facilitate the installation and removal of special-shaped block 401, limiting ring 8 is stored, positioning plate 6 is installed on reaction kettle 3, and limiting piece 7 for positioning limiting ring 8 is arranged on positioning plate 6, wherein limiting piece 7 can be locked to limiting ring 8 by bolt, and positioning plate 6 is used to provide mounting space for limiting piece 7, and specific means is not limited here.
[0031] The utility model embodiment provides a kind of reaction kettle for MDI derivative test, to ensure that reaction kettle 3 is well fixed, recess for placing reaction kettle 3 is opened in rotary table 2 to preposition reaction kettle 3, and a plurality of mounting plates 9 are fixedly installed on rotary table 2, as shown in Figure 1 And Figure 3 Clamping plate 10 that can be close to or away from reaction kettle 3 is slidably arranged on mounting plate 9, and locking piece 11 for driving clamping plate 10 to clamp reaction kettle 3 is also arranged on mounting plate 9, and the clamping surface of clamping plate 10 is preferably matched with the circular arc surface of the surface of reaction kettle 3.
[0032] The utility model discloses a kind of reaction kettles for MDI derivative test provided in an embodiment, to facilitate understanding the reaction state inside reaction kettle 3, here can be provided with mounting port on reaction kettle 3, and sealing installation has observation window at mounting port position, and observation window is transparent material.In addition, temperature sensor for detecting the temperature inside reaction kettle 3 and pressure sensor for detecting the pressure inside reaction kettle 3 are also provided on reaction kettle 3.
[0033] The above is only preferred embodiment of the utility model, it should be pointed out, for the ordinary skilled person in the art, without departing from the technical principle of the utility model, under the premise of, can also make a number of improvements and deformation, these improvements and deformation also should be considered as the protection scope of the utility model.
Claims
1. A reaction vessel for MDI derivative test, characterized in that, The utility model relates to a reaction kettle device, including frame (1) and rotation setting on frame (1) rotation platform (2), fixed setting has reaction kettle (3) on rotation platform (2), still install drive device (5) for driving rotation platform (2) rotation on frame (1). The reaction kettle (3) is hollow in the whole, and a plurality of notches recessed into the reaction kettle (3) are arranged on the outer wall surface of the reaction kettle (3), the notches are protrusions in the interior of the reaction kettle (3), the protrusions include a first inclined surface connected with the outer wall of the reaction kettle (3) and a second inclined surface, the included angle between the first inclined surface and the tangent line of the connection point between the first inclined surface and the inner wall of the reaction kettle (3) is obtuse, and the included angle between the second inclined surface and the tangent line of the connection point between the second inclined surface and the inner wall of the reaction kettle (3) is not greater than 90 degrees. The notch is provided with a heating device (4), and the heating device (4) is used for heating the protruding surface of the protrusion in the reaction kettle (3).
2. The reaction vessel for MDI derivative test according to claim 1, wherein The heating device (4) includes a special-shaped block (401) and a heating plate (402) fixed on one side of the special-shaped block (401), the special-shaped block (401) is used for being embedded in the notch of the reaction kettle (3), and the heating plate (402) is used for heating the first inclined surface and / or the second inclined surface of the protrusion.
3. The reaction vessel for MDI derivative test according to claim 2, wherein The shape and size of the special-shaped block (401) meet the condition that the outer edge of the special-shaped block (401) is not recessed into the outer wall of the reaction kettle (3) after the special-shaped block (401) is embedded.
4. The reaction vessel for MDI derivative test according to claim 3, wherein The outer wall of the reaction kettle (3) is sleeved with a limiting ring (8), the reaction kettle (3) is provided with a positioning plate (6), the positioning plate (6) is provided with a limiting part (7) for positioning the limiting ring (8), and the limiting ring (8) can bind the special-shaped block (401) on the reaction kettle (3).
5. The reaction vessel for MDI derivative test according to claim 1, wherein The protrusions are arranged in a circumferential array on the inner wall of the reaction kettle (3).
6. The reaction vessel for MDI derivative test according to claim 1, wherein A plurality of mounting plates (9) are fixedly installed on the rotation platform (2), a clamping plate (10) capable of approaching or moving away from the reaction kettle (3) is slidably arranged on the mounting plate (9), and the mounting plate (9) is further provided with a locking part (11) for driving the clamping plate (10) to clamp the reaction kettle (3).
7. The reaction vessel for MDI derivative test according to claim 1, wherein An installation opening is formed in the reaction kettle (3), and a viewing window made of transparent material is sealingly mounted at the installation opening.
8. The reaction vessel for MDI derivative test according to claim 1, wherein The reaction kettle (3) is further provided with a temperature sensor for detecting the temperature in the reaction kettle (3) and a pressure sensor for detecting the pressure in the reaction kettle (3).