A spinning pitch pretreatment kettle
By coordinating the design of the stirring unit and the heating and unloading unit, the problem of material deposition and residue in the spinning pitch pretreatment kettle was solved, and uniform heating and efficient unloading of the material in the kettle were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-24
- Publication Date
- 2026-06-30
AI Technical Summary
The existing spinning pitch pretreatment kettle has problems such as material accumulation and uneven mixing in the outlet pipe, resulting in low material participation rate and large residual amount.
The mixing unit and the heating and unloading unit are designed in a coordinated manner. The heating and unloading unit heats the material when it moves upward and opens the unloading channel as a valve when it moves downward. The bottom of the vessel is scraped and cleaned by the linkage between the spherical contact surface and the elastic mixing mechanism.
It effectively solves the problem of material deposition at the bottom of the vessel, improves stirring efficiency, reduces residue, and ensures uniform heating and efficient unloading of materials inside the vessel.
Smart Images
Figure CN224422596U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a spinning pitch pretreatment kettle. Background Technology
[0002] Spinning pitch is a key precursor for the preparation of high-performance carbon fibers and pitch-based carbon materials, and its quality directly determines the performance of the final carbon materials. The preparation of spinning pitch typically involves high-temperature reaction processes such as raw material pretreatment, polymerization, and condensation. During this process, the pitch raw material needs to be uniformly heated and stirred in a reactor, and often requires the removal of light components and moisture under vacuum or inert gas protection, ultimately yielding spinning pitch with a uniform molecular weight distribution and suitable rheological properties.
[0003] Currently, the pretreatment kettles commonly used in the industry have the following technical pain points:
[0004] Because the heated spinning bitum needs to be discharged, a discharge pipe needs to be installed at the bottom of the reactor body, and a valve is installed at the bottom of the discharge pipe. This results in a certain amount of spinning bitum material accumulating in the discharge pipe, which leads to a low participation rate of this material during stirring.
[0005] Secondly, considering the stirring resistance, the stirrer in the prior art maintains a distance from the inner wall of the vessel.
[0006] Therefore, during the later stages of unloading, some asphalt material always adheres to the inner bottom surface of the reactor and cannot flow out.
[0007] Based on the above problems, we designed a spinning pitch pretreatment kettle that allows materials to participate effectively in mixing and reduces residual spinning pitch after mixing. Utility Model Content
[0008] The technical problem to be solved by this invention is to provide a pretreatment kettle for spinning pitch that allows materials to participate effectively in mixing and reduces residual spinning pitch after mixing.
[0009] To solve the above problems, the present invention adopts the following technical solution:
[0010] A pretreatment vessel for spinning asphalt includes a vessel body and a vessel lid. The vessel lid is detachably installed on the top of the vessel body. The lower part of the vessel body is spherical. An outlet pipe is provided at the center of the bottom of the vessel body. The vessel body also includes a controller, and a liquid level sensor, a temperature sensor, and a vessel pressure sensor connected to the controller. The liquid level sensor, temperature sensor, and vessel pressure sensor are all installed on the vessel body. A vacuum pipe and an air inlet pipe are also provided on the top of the vessel lid. Solenoid valves are installed on both the vacuum pipe and the air inlet pipe, and the solenoid valves are connected to the controller. A stirring motor is fixedly installed at the top axis of the vessel lid, and the stirring motor is connected to the controller. A feeding pipe is provided on the top of the vessel lid, and a sealing cap is detachably installed at the opening of the feeding pipe. The vessel body also includes…
[0011] A stirring unit is coaxially disposed at the center of the reactor body and is driven to rotate by the stirring motor to stir the asphalt raw materials entering the reactor body;
[0012] A heating and unloading unit is installed via the outlet pipe. When the heating and unloading unit moves upward, it heats the asphalt raw material in the reactor. When the heating and unloading unit moves downward, it opens the outlet pipe so that the stirred asphalt raw material can be discharged through the outlet pipe.
[0013] Preferably, the heating and unloading unit includes a sealing tube, a heating cap, and a telescopic device. The heating cap is sealed at the upper end of the sealing tube, which is inserted through the axis of the outlet tube. An installation tube is provided near the bottom of the outer wall of the sealing tube, through which heat transfer oil is injected and a heater is installed. The heater is controlled by the controller. The lower end of the telescopic device is fixed, and the movable end of the telescopic device is fixed to the bottom of the sealing tube. The telescopic device is also controlled by the controller. A circular sealing plate is fitted on the outer wall of the heating cap, and an unloading pipe is welded to the outer wall of the outlet tube. During asphalt mixing, the sealing plate seals the unloading pipe. During unloading, the heating cap moves downward so that the asphalt raw material in the reactor is discharged through the unloading pipe. The heating cap works in conjunction with the mixing unit.
[0014] Preferably, a clamping ring is detachably fitted at the bottom axis of the outlet tube, and a high-temperature resistant sealing ring is sandwiched between the clamping ring and the outlet tube. The sealing ring elastically deforms under pressure, and the sealing ring forms a seal between the sealing tube and the outlet tube.
[0015] Preferably, the heater is an electric heater.
[0016] Preferably, one or more sealing rings are provided on the inner wall of the compression ring, and a seal is formed between the sealing rings and the outer wall of the sealing tube.
[0017] Preferably, the upper end of the heating cap is provided with a spherical contact surface. The stirring unit includes a stirring shaft, a stirring rod, and an elastic stirring mechanism. The stirring shaft and the vessel lid are fitted with a bearing and a shaft seal. The shaft seal is sealed at the lower part of the bearing. The upper end of the stirring shaft is connected to the output end of the stirring motor. The stirring rod is installed outside the stirring shaft. Multiple stirring rods are provided. The elastic stirring mechanism is movably installed at the bottom of the stirring rod. The elastic stirring mechanism cooperates with the spherical contact surface.
[0018] Preferably, the elastic stirring mechanism includes a support block, stirring scrapers, a rotating block, and a guide rod. Multiple stirring scrapers are arranged in a ring around the outside of the support block. The lower end of the rotating block is spherical, used to contact the spherical contact surface. The upper end of the rotating block is embedded in the support block. A second bearing and a second shaft seal are fitted between the rotating block and the support block. The second shaft seal seals the lower part of the second bearing. The guide rod is coaxially mounted on the top of the support block. The lower end of the stirring shaft is coaxially positioned... The guide rod has an installation hole with a vertically oriented guide groove on its wall. A top plate is provided at the upper end of the guide rod, fitting the inner wall of the installation hole. A guide block that matches the guide groove is provided on the outer wall of the top plate. A spring is provided inside the installation hole, acting on the top of the top plate. A hole cover is installed at the opening of the installation hole, and a second sealing ring is provided between the hole cover and the installation hole. A second sealing ring is provided on the inner wall of the hole cover, forming a seal between the second sealing ring and the guide rod.
[0019] The beneficial effects of this utility model are:
[0020] Through the innovative collaborative design of the "stirring unit" and the "heating and unloading unit," a single mechanism solves multiple problems simultaneously. The heating and unloading unit acts as a heater to efficiently heat the material when moving upwards, and as a valve to open the unloading channel when moving downwards. It also automatically completes the scraping and cleaning function of the bottom of the vessel through the linkage of the spherical contact surface at the top with the elastic stirring mechanism, completely avoiding the problem of material deposition at the bottom of the vessel.
[0021] The design of the elastic stirring mechanism is one of the core innovations of this invention. When strong stirring is required, the telescopic device rises, and the heating cap lifts the entire elastic stirring mechanism, causing the stirring scraper to detach from the bottom of the vessel, significantly reducing the rotational resistance torque and the load on the stirring motor, thereby reducing energy consumption. During the unloading and scraping stages, the elastic stirring mechanism, under the action of springs and gravity, compacts the bottom of the vessel, ensuring that the sediment can be completely scraped away.
[0022] The heater is directly installed at the bottom of the sealed tube, and heat is transferred directly to the material located at the deepest center of the vessel through the heat transfer oil and the sealed tube, solving the problem of the lowest bottom temperature in traditional jacketed heating systems. This central heating method makes heat transfer more direct and efficient, ensuring uniform heating of the material inside the vessel and avoiding coking caused by excessively high local temperatures.
[0023] When the heating and unloading unit is lifted, it can prevent materials from entering the discharge pipe, so that the raw materials in the reactor are effectively stirred. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the structure of this utility model;
[0026] Figure 2 This is a structural diagram of the stirring unit;
[0027] Figure 3 This is a schematic diagram showing the connection between the flexible stirring mechanism and the heating cap;
[0028] Figure 4 This is a cross-sectional view of the elastic stirring unit;
[0029] Figure 5 for Figure 4 Enlarged view at point A.
[0030] The diagram includes: vessel body 1, vessel cover 2, controller 3, liquid level sensor 31, temperature sensor 32, vessel pressure sensor 33, alarm 34, vacuum pipe 21, air inlet pipe 22, solenoid valve 23, stirring motor 24, feeding pipe 25, sealing cover 26, stirring unit 4, stirring shaft 41, mounting hole 412, guide groove 413, hole cover 414, second sealing ring 415, second sealing ring 416, stirring rod 42, and elastic stirring mechanism 43. 431, support block, 432, stirring scraper, 433, rotating block, guide rod, 434, second bearing, 435, second shaft seal, 436, top plate, 437, guide block, 438, spring, 439, heating and unloading unit, 5, sealing pipe, 51, heating cap, 52, spherical contact surface, 521, telescopic device, 53, mounting pipe, 54, heater, 55, sealing plate, 56, outlet pipe, 101, unloading pipe, 111, clamping ring, 112, sealing ring, 113, sealing ring, 114. Detailed Implementation
[0031] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.
[0032] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.
[0033] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0034] Furthermore, in the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0036] See Figure 1 and Figure 2The diagram shows a spinning pitch pretreatment vessel, comprising a vessel body 1 and a vessel cover 2. The vessel cover 2 is detachably installed on the top of the vessel body 1. The vessel body 1 and the vessel cover are connected by bolts. The contact area between the vessel body 1 and the vessel cover 2 is sealed. The lower part of the vessel body 1 is spherical, and an outlet pipe 101 is provided at the center of the bottom of the vessel body 1. The spherical transition of the lower part of the vessel body 1 allows material to accumulate at the outlet pipe 101. The vessel also includes a controller 3, and a liquid level sensor 31, a temperature sensor 32, and a vessel pressure sensor 33 connected to the controller 3. The controller is a PLC controller. All pressure sensors 33 are mounted on the vessel body. The aforementioned level sensor 31 is used to detect the maximum liquid level. When the liquid level in the vessel body 1 reaches the position of the level sensor 31, the controller 3 issues an alarm via an alarm 34. A vacuum pipe 21 and an air inlet pipe 22 are also provided on the top of the vessel lid 2. Solenoid valves 23 are installed on both the vacuum pipe 21 and the air inlet pipe 22. The vacuum pipe 21 is used to perform vacuuming when vacuum mixing is required. The internal pressure of the vessel body 1 is monitored in real time by the vessel body pressure sensor 33. The vacuuming stops when the set pressure of the controller 3 is reached. The air inlet pipe 22 is used to supply gas through a pressurizing device to increase the internal pressure of the vessel body 1 when high-pressure stirring is required. The internal pressure is also detected by the vessel body pressure sensor 33. Solenoid valve 23 is connected to controller 3. A stirring motor 24 is fixedly installed at the top axis of the vessel lid 2. The stirring motor 24 is connected to controller 3. A feeding pipe 25 is provided on the top of the vessel lid 2. A sealing cap 26 is detachably installed at the opening of the feeding pipe 25. The system also includes...
[0037] A stirring unit 4 is coaxially arranged at the center of the vessel body 1 and is driven to rotate by the stirring motor 24 to stir the asphalt raw material entering the vessel body 1.
[0038] The heating and unloading unit 5 is installed via the outlet pipe 101. When the heating and unloading unit 5 moves upward, it heats the asphalt raw material in the reactor body 1. When the heating and unloading unit 5 moves downward, it opens the outlet pipe 101 so that the asphalt raw material after stirring is discharged through the outlet pipe 101.
[0039] See Figure 1 , Figure 2 and Figure 3Therefore, the heating unloading unit 5 includes a sealing pipe 51, a heating cap 52, and a telescopic device 53. The heating cap 52 is sealed to the upper end of the sealing pipe 51. The heating cap 52 and the sealing pipe 51 are installed by welding to form a seal. The sealing pipe 51 is inserted through the axis of the outlet pipe 101. An installation pipe 54 is provided near the bottom of the outer wall of the sealing pipe 51. Heat transfer oil is injected through the installation pipe 54, and a heater 55 is installed through the installation pipe 54. The heater 55 is an electric heater, and the heater 55 is controlled by the controller 3. The telescopic device 53... The lower end is fixed, and the movable end of the telescopic device 53 is fixed to the bottom of the sealing tube 51. The telescopic device 53 is controlled by the controller 3. The telescopic device 53 is an electric push rod. A circular sealing plate 56 is clamped on the outer wall of the heating cap 52. A discharge pipe 111 is welded on the outer wall of the outlet pipe 101. When stirring asphalt, the sealing plate 56 forms a seal on the discharge pipe 111. When discharging, the heating cap 52 moves downward so that the asphalt raw material in the reactor body 1 is discharged through the discharge pipe 111. The heating cap 52 is used in conjunction with the stirring unit 4.
[0040] In the above technical solution, when the telescopic device 53 retracts, the bottom of the stirring unit 4 loses its support, causing the stirring unit 4 to scrape the inner bottom of the vessel 1, thereby scraping off the material deposited at the bottom of the vessel 1. At this time, the discharge pipe 111 is in the open state.
[0041] When the telescopic device 53 is raised, the bottom of the stirring unit 4 is subjected to an upward thrust, causing the stirring unit 4 to detach from the inner surface of the vessel body 1, thereby reducing resistance during the mixing process. At this time, the sealing plate 56 on the outside of the heating cap 52 forms a seal against the discharge pipe 111.
[0042] See Figure 3 As shown, a clamping ring 112 is detachably fitted at the bottom axis of the outlet tube 101. A high-temperature resistant sealing ring 113 is sandwiched between the clamping ring 112 and the outlet tube 101. The sealing ring 113 elastically deforms under pressure, and the sealing ring 113 forms a seal between the sealing tube 51 and the outlet tube 101.
[0043] The above technical solution provides a sealing measure to prevent asphalt raw materials from dripping downwards when the sealing sheet 56 fails.
[0044] See Figure 3 As shown, one or more sealing rings 114 are fastened to the inner wall of the clamping ring 112, and the sealing rings 114 form a seal with the outer wall of the sealing tube 51.
[0045] The above technical solution provides a third layer of sealing, further reducing the chance of asphalt leakage.
[0046] See Figure 2 and Figure 3 As shown, the upper end of the heating cap 52 is provided with a spherical contact surface 521. The stirring unit 4 includes a stirring shaft 41, a stirring rod 42, and an elastic stirring mechanism 43. The stirring shaft 41 is fitted with a bearing 410 and a shaft seal 411 between it and the vessel cover 2. The shaft seal 411 seals the lower part of the bearing 410. The upper end of the stirring shaft 41 is connected to the output end of the stirring motor 24. The stirring rod 42 is installed on the outside of the stirring shaft 41. Multiple stirring rods 42 are provided. The elastic stirring mechanism 43 is movably installed on the bottom of the stirring shaft 41. The elastic stirring mechanism 43 cooperates with the spherical contact surface 521.
[0047] In the above technical solution, the stirring rod 42 is at a fixed height for stirring, while the height of the stirring unit 43 will change under the action of the spherical contact surface 521.
[0048] See Figure 4 and Figure 5 As shown, the elastic stirring mechanism 43 includes a support block 431, stirring scrapers 432, a rotating block 433, and a guide rod 434. Multiple stirring scrapers 432 are arranged in a ring around the outside of the support block 431. The lower end of the rotating block 433 is spherical, used to contact the spherical contact surface 521. The upper end of the rotating block 433 is embedded in the support block 431. A second bearing 435 and a second shaft seal 436 are fitted between the rotating block 433 and the support block 431. The second shaft seal 436 seals the lower part of the second bearing 435. The guide rod 434 is coaxially mounted on the top of the support block 431. The lower end of the stirring shaft 41 is coaxially provided with a mounting hole 41. 2. A guide groove 413 is vertically provided on the wall of the mounting hole 412. A top plate 437 is provided at the upper end of the guide rod 434. The top plate 437 fits into the inner wall of the mounting hole 412. A guide block 438 that cooperates with the guide groove 413 is provided on the outer wall of the top plate 437. A spring 439 is provided in the mounting hole 412. The spring 439 acts on the top of the top plate 437. A hole cover 414 is installed at the opening of the mounting hole 412. A second sealing ring 415 is provided between the hole cover 414 and the mounting hole 412. A second sealing ring 416 is provided on the inner wall of the hole cover 414. The second sealing ring 416 and the guide rod 434 form a seal.
[0049] In the above technical solution, the height of the support block 431 is adjustable. Under the action of the spring 439 and gravity, when the heating cap 52 moves downward, the support block 431 moves downward so that the stirring scraper 432 acts on the inner bottom surface of the vessel body 1.
[0050] When the heating cap 52 moves upward, it acts on the rotating block 433, causing the spring 439 to compress, so that the stirring scraper 432 is disengaged from the inner wall of the vessel body 1, thereby reducing rotational resistance.
[0051] Operating instructions:
[0052] S1. Feeding and initial mixing:
[0053] Open the sealing cap 26 on the feeding pipe 25, put the asphalt raw material into the reactor body 1, and close the sealing cap 26. Start the stirring motor 24 to drive the stirring unit 4 to rotate and perform preliminary mixing of the asphalt raw material in the reactor body 1.
[0054] S2. Operating Condition Selection and Execution:
[0055] According to process requirements, controller 3 selects and executes at least one of the following operating conditions:
[0056] Vacuum operation: Open the solenoid valve 23 on the vacuum tube 21 to start the external vacuum equipment and perform vacuum treatment inside the vessel 1. At the same time, the stirring unit 4 continuously stirs. The pressure inside the vessel is monitored by the vessel pressure sensor 33. After the set vacuum degree is reached, the solenoid valve 23 is closed.
[0057] Pressurization mode: Open the solenoid valve 23 on the air inlet pipe 22 to fill the vessel 1 with inert gas through the external pressurization device, while the stirring unit 4 continuously stirs; monitor the pressure inside the vessel through the vessel pressure sensor 33, and close the solenoid valve 23 after the set pressure is reached.
[0058] S3. Heating and stirring:
[0059] The controller 3 controls the telescopic device 53 to lift, driving the heating and unloading unit 5 to move upward: the heating cap 52 moves upward and finally pushes the rotating block 433 of the elastic stirring mechanism 43 upward through its spherical contact surface 521, compressing the spring 439, so that the entire elastic stirring mechanism 43 drives the stirring scraper 432 to move upward, thereby separating it from the inner bottom surface of the vessel body 1; at the same time, the sealing sheet 56 on the outer wall of the heating cap 52 is tightly fitted with the unloading pipe 111 to form a seal; the controller 3 starts the heater 55, and the heat is transferred to the heating cap 52 through the sealing pipe 51 and the internal heat transfer oil to heat the material; in this state, the stirring unit 4 fully stirs and mixes the material under low resistance, and the stirring motor 24 has a low load.
[0060] S4. Scraping and Discharging:
[0061] After mixing is completed, controller 3 controls telescopic device 53 to retract, driving heating unloading unit 5 to descend; heating cap 52 descends, its pushing force on elastic stirring mechanism 43 disappears, elastic stirring mechanism 43 moves downward under the restoring force of spring 439 and its own gravity, forcing stirring scraper 432 to compact and scrape the inner bottom surface of the vessel body 1, scraping up the deposited material; at the same time, after heating cap 52 descends, its sealing plate 56 disengages from unloading pipe 111, opening the unloading channel; the scraped material mixes with the main material under stirring action and is discharged out of the vessel through the opened unloading pipe 111.
[0062] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0063] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0064] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0065] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0066] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0067] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A pretreatment vessel for spinning asphalt, comprising a vessel body and a vessel lid, the vessel lid being detachably mounted on the top of the vessel body, the lower part of the vessel body being spherical, an outlet pipe being provided at the center of the bottom of the vessel body, a controller, and a liquid level sensor, a temperature sensor, and a vessel pressure sensor connected to the controller, the liquid level sensor, temperature sensor, and vessel pressure sensor being all mounted on the vessel body, a vacuum pipe and an air inlet pipe being provided on the top of the vessel lid, both the vacuum pipe and the air inlet pipe being equipped with solenoid valves connected to the controller, a stirring motor being fixedly mounted at the top axis of the vessel lid, the stirring motor being connected to the controller, a feeding pipe being provided on the top of the vessel lid, and a sealing cap being detachably mounted at the opening of the feeding pipe, characterized in that: It also includes, A stirring unit is coaxially disposed at the center of the reactor body and is driven to rotate by the stirring motor to stir the asphalt raw materials entering the reactor body; A heating and unloading unit is installed via the outlet pipe. When the heating and unloading unit moves upward, it heats the asphalt raw material in the reactor. When the heating and unloading unit moves downward, it opens the outlet pipe so that the stirred asphalt raw material can be discharged through the outlet pipe.
2. The spinning pitch pretreatment kettle according to claim 1, characterized in that: The heating and unloading unit includes a sealing tube, a heating cap, and a telescopic device. The heating cap is sealed at the upper end of the sealing tube, which is inserted through the axis of the outlet tube. An installation tube is provided near the bottom of the outer wall of the sealing tube, through which heat transfer oil is injected and a heater is installed. The heater is controlled by the controller. The lower end of the telescopic device is fixed, and the movable end of the telescopic device is fixed to the bottom of the sealing tube. The telescopic device is also controlled by the controller. A circular sealing plate is fitted on the outer wall of the heating cap, and an unloading pipe is welded to the outer wall of the outlet tube. During asphalt mixing, the sealing plate seals the unloading pipe. During unloading, the heating cap moves downward, allowing the asphalt raw material in the reactor to be discharged through the unloading pipe. The heating cap works in conjunction with the mixing unit.
3. The spinning pitch pretreatment kettle according to claim 2, characterized in that: A clamping ring is detachably fitted at the bottom axis of the outlet tube, and a high-temperature resistant sealing ring is sandwiched between the clamping ring and the outlet tube. The sealing ring elastically deforms when compressed, and forms a seal between the sealing tube and the outlet tube.
4. The spinning pitch pretreatment kettle according to claim 2, characterized in that: The heater is an electric heater.
5. The spinning pitch pretreatment kettle according to claim 3, characterized in that: One or more sealing rings are fitted into the inner wall of the compression ring, and a seal is formed between the sealing rings and the outer wall of the sealing tube.
6. The spinning pitch pretreatment kettle according to claim 2, characterized in that: The upper end of the heating cap is provided with a spherical contact surface. The stirring unit includes a stirring shaft, a stirring rod, and an elastic stirring mechanism. The stirring shaft and the vessel lid are fitted with a bearing and a shaft seal. The shaft seal is sealed at the lower part of the bearing. The upper end of the stirring shaft is connected to the output end of the stirring motor. The stirring rod is installed outside the stirring shaft. Multiple stirring rods are provided. The elastic stirring mechanism is movably installed at the bottom of the stirring rod. The elastic stirring mechanism cooperates with the spherical contact surface.
7. The spinning pitch pretreatment kettle according to claim 6, characterized in that: The elastic stirring mechanism includes a support block, stirring scrapers, a rotating block, and a guide rod. Multiple stirring scrapers are arranged in a ring around the outside of the support block. The lower end of the rotating block is spherical, used to contact the spherical contact surface. The upper end of the rotating block is embedded in the support block. A second bearing and a second shaft seal are fitted between the rotating block and the support block. The second shaft seal seals the lower part of the second bearing. The guide rod is coaxially mounted on the top of the support block. A mounting hole is coaxially provided at the lower end of the stirring shaft. A guide groove is vertically provided on the wall of the mounting hole. A top plate is provided at the upper end of the guide rod, fitting the inner wall of the mounting hole. A guide block that matches the guide groove is provided on the outer wall of the top plate. A spring is provided inside the mounting hole, acting on the top of the top plate. A hole cover is installed at the opening of the mounting hole. A second sealing ring is provided between the hole cover and the mounting hole. A second sealing ring is provided on the inner wall of the hole cover, forming a seal with the guide rod.