Preparation process of polyvinyl chloride cable material

Abstract

The invention relates to a preparation process of a polyvinyl chloride cable material in the field of cables, and the preparation process of the polyvinyl chloride cable material specifically comprises the following steps: selecting raw material master batch, adding a plasticizer, mixing and stirring: setting mixing equipment parameters and a uniform identification value; mixing and stirring, monitoring local resistance, and if the local resistance exists, adjusting the vibration feeding part to promote melting; checking the uniformity of the materials after stirring, returning to the previous step if the materials are non-uniform, feeding and adding additives if the materials are uniform, ensuring that the additives are uniform through graded feeding and secondary stirring when the additives are added, and continuing after stirring; checking the uniformity again, and if the uniformity is uniform, extruding and granulating; after granulation, screening particles with uniform sizes; the cable material mixing and feeding device can feed back information in the mixing and feeding process in real time, adjusts mixing, stirring and feeding work according to the local resistance condition during stirring, ensures that materials and auxiliaries are uniformly mixed, and ensures that the prepared cable material is stable in quality and reliable in performance.

Description

Technical Field

[0001] The invention relates to a preparation process of a polyvinyl chloride cable material, in particular to a preparation process of a polyvinyl chloride cable material applied in the cable field. Background Art

[0002] In the wire and cable industry, polyvinyl chloride (PVC) cable materials have always occupied an important position. As a widely used cable material, polyvinyl chloride cable materials have been widely used in many fields such as electricity, communications, and construction due to their unique properties and advantages.

[0003] PVC cable materials are mainly composed of PVC resin, stabilizer, plasticizer, filler, lubricant, etc. PVC cable materials have been widely used in the wire and cable industry due to their good electrical insulation performance, heat resistance, cold resistance, oil resistance, chemical corrosion resistance and weather resistance. In the future, with the continuous advancement of science and technology and the continuous improvement of environmental protection requirements, PVC cable materials will face more challenges and opportunities.

[0004] In order to solve the problem of production quality of polyvinyl chloride cable materials, a polyvinyl chloride cable material production process in the market adopts the design of adding auxiliary agents, which has a certain market share.

[0005] Chinese invention patent CN116656061B discloses a heat-resistant and anti-aging polyvinyl chloride cable material and its preparation process. The molecular structure of the aging resistance agent contains a large number of benzene rings, and the benzene rings have high stability, which gives it good high temperature resistance. In addition, its molecular structure also contains hindered phenol structure and aniline structure, which gives it good free radical elimination effect and improves its anti-oxidation and aging effect. In addition, its molecular structure also contains triazine ring structure, which can further improve its aging resistance. Therefore, adding the aging resistance agent to the polyvinyl chloride cable material can improve its high temperature resistance and anti-oxidation and aging performance, thereby improving its service life.

[0006] There are still some shortcomings in the current polyvinyl chloride cable materials. For example, in the existing production of polyvinyl chloride cable materials, the masterbatch is easily unevenly stirred, and local solidification may occur unexpectedly during the stirring process, which can easily affect the product quality. In the existing production process, it is not easy to monitor the local solidification of the material during mixing and make adjustments. Summary of the invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that in the existing production of polyvinyl chloride cable materials, the masterbatch is easily unevenly stirred, and local coagulation may occur unexpectedly during the stirring process, which may easily affect the product quality. In the existing production process, it is not easy to monitor the local coagulation state of the material during mixing and make adjustments.

[0008] In order to solve the above problems, the present invention provides a preparation process of a polyvinyl chloride cable material, which specifically comprises the following steps:

[0009] A1, select raw material masterbatch, and add plasticizer to the selected raw material masterbatch;

[0010] A2, material mixing and stirring treatment: put the raw material masterbatch with plasticizer into the mixer and prepare for mixing and stirring;

[0011] A21, set the mixing equipment working parameters and the mixing uniformity identification value range;

[0012] A22, mixing and stirring work, controls the mixing equipment to stir the plastic masterbatch evenly. During the stirring process, the local resistance of the mixing tank during stirring is monitored through the monitoring plate on the stirring shaft. According to the monitored local resistance, the vibration feeding part is adjusted to vibrate and heat the area; promote the rapid melting of the local solidification area; proceed to the next step after the stirring time is set;

[0013] A23, determine whether the material is stirred evenly, if not, return to step A22; if it is evenly, perform feeding, select additives and add them through the vibrating feeding part; when adding, the vibrating feeding part performs graded feeding from top to bottom through multiple vibrating feeding parts; when adding additives, perform secondary stirring at a set speed, and when adding, the vibrating feeding part vibrates and intermittently outputs the liquid additive to promote the diffusion and uniform distribution of the additive; after stirring for a set time, proceed to the next step;

[0014] A25, after the second stirring, determine whether the material is stirred evenly; if so, extrude the material for granulation, otherwise return to step A24;

[0015] A3, after granulation, the particles are screened to select particles of uniform size for the next step of processing;

[0016] A4, conduct quality inspection on the screened particles; qualified particles are packaged.

[0017] In the preparation process of the polyvinyl chloride cable material, the raw materials are mixed evenly before granulation, and the additives can be evenly added during the mixing process.

[0018] As a further improvement of the present application, the mixing device includes a mixing tank with a motor, and the mixing tank is installed on a bracket, a stirring shaft matching the motor is installed in the mixing tank, a plurality of evenly distributed stirring units are installed on the stirring shaft, two pairs of stirring blades are fixedly connected to the stirring unit, a monitoring board is fixedly connected to the stirring blade, and a pressure sensing belt and a temperature sensor are arranged on the monitoring board;

[0019] An auxiliary frame is connected between one pair of stirring blades, a vibrating feeding part is installed in the middle of the auxiliary frame, the vibrating feeding part includes a fixed beam, a plurality of vibrating blocks are slidably arranged at the lower end of the fixed beam, a vibrating motor matching the plurality of vibrating blocks is penetrated in the fixed beam, a plurality of pairs of nozzles are arranged at the side ends of the vibrating blocks, a plurality of branch pipes sliding relative to the vibrating blocks are arranged on the vibrating motor, and a vibrating motor for vibrating the vibrating blocks up and down is installed in the fixed beam;

[0020] Both the stirring unit and the stirring blade are provided with guide channels, the stirring shaft is provided with an input pipe and an output pipe matching the guide channels, the stirring shaft is provided with a liquid inlet pipe and a liquid discharge pipe, the liquid inlet pipe and the liquid discharge pipe are communicated with the guide channels of multiple stirring units, a guide plate is installed at one end of the stirring shaft located outside the mixing tank, the guide plate includes an upper disc and a lower disc adjacent to each other, the upper disc and the lower disc are provided with through holes distributed in a circular shape, the through holes on the upper disc and the lower disc are communicated with the liquid inlet pipe and the liquid discharge pipe respectively, a guide box matching the guide plate is installed on the bracket, the guide box is used to regulate the input and output of the liquid in the stirring shaft.

[0021] As a further improvement of the present application, when identifying whether the material is uniform in A23, multiple stirring units rotate at a set speed, and when rotating, it is identified whether the resistance detected at the multiple stirring units is within the set value range; if so, it is judged that the stirring is uniform, otherwise it is judged that the stirring is uneven.

[0022] As a further improvement of the present application, the liquid inlet pipe is arranged in the middle of the stirring shaft, the liquid discharge pipe is sleeved on the outer end of the liquid inlet pipe, and the liquid discharge pipe is made of heat-conducting material.

[0023] As another improvement of the present application, three upper and lower adjacent vibration feeding parts are respectively located at the front, middle and rear sections of the stirring blade, and the distance between two upper and lower adjacent monitoring plates is 2-10 mm.

[0024] As another improvement of the present application, the two pairs of stirring blades are X-shaped, the guide channels are opened in the two stirring blades connected to the auxiliary frame, and the long sides of the other two stirring blades are chamfered.

[0025] As another improvement of the present application, the monitoring plate includes a pair of C-shaped beams that slide relative to the mixing blades, side baffles are connected between the pair of C-shaped beams, side ends of the C-shaped beams and the side baffles are covered with pressure sensing belts, and double-axis electric push rods connected to the side baffles are installed at the front and rear ends of the mixing blades, and the maximum movable range of the vibration block is within the height range of the monitoring plate.

[0026] As another improvement of the present application, it also includes a production control system, the production control system includes a processor, and the processor is connected to a data processing module, a monitoring module, a control module and an alarm module;

[0027] The control module is provided with a stirring mode and a feeding mode; the stirring mode is used to control the stirring and mixing work, and the feeding mode is used to control the feeding work;

[0028] The data processing module is used to receive and process the monitoring data from the monitoring module in real time;

[0029] The data processing module determines the uniformity of material mixing and whether there are abnormal conditions such as local solidification based on the monitoring data analysis; according to the analysis results, it sends preset instructions to the control module to adjust the mixing parameters or feeding method;

[0030] The monitoring module is connected to the pressure sensor with a signal, and is used to collect monitoring data of the mixing equipment, including stirring resistance, material temperature and additive dosage.

[0031] In summary, this solution can provide real-time feedback on the information during the mixing and feeding process, adjust the mixing and feeding work according to the local resistance conditions during stirring, ensure that the materials and additives are mixed evenly, and ensure that the prepared cable materials have stable quality and reliable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a process flow chart of the first embodiment of the present application;

[0033] Figure 2 A three-dimensional diagram of a mixing device according to the first and second embodiments of the present application;

[0034] Figure 3 It is a cross-sectional view of the mixing device of the first and second embodiments of the present application;

[0035] Figure 4 for Figure 3 The structural diagram at A in the middle;

[0036] Figure 5 for Figure 3 The structural diagram at B in the middle;

[0037] Figure 6 This is a schematic diagram of the vibration operation of the vibration feeding part of the first and second embodiments of the present application;

[0038] Figure 7 It is a partial three-dimensional diagram of the stirring shaft of the first and second embodiments of the present application;

[0039] Figure 8 This is a cross-sectional view of the mixing tank according to the first and second embodiments of the present application;

[0040] Fig. 9 for Figure 8 Schematic diagram of the structure at C in the middle;

[0041] Fig.10This is a schematic diagram of the working state of the C-beam after adjustment in the second implementation mode of the present application.

[0042] Description of the numbers in the figure:

[0043] 1 mixing tank, 2 stirring shaft, 21 stirring unit, 22 stirring blade, 23 liquid inlet pipe, 24 liquid discharge pipe, 3 monitoring plate, 31 C-beam, 32 side baffle, 4 auxiliary frame, 5 vibration feeding part, 51 fixed beam, 52 vibration block, 53 vibration motor, 6 guide box, 7 guide plate, 71 upper disc, 72 lower disc. DETAILED DESCRIPTION

[0044] The following is a detailed description of three implementation methods of the present application in conjunction with the accompanying drawings.

[0045] The first implementation method:

[0046] Figure 1-7 A preparation process of a polyvinyl chloride cable material is shown, which specifically comprises the following steps:

[0047] A1, select raw material masterbatch, and add plasticizer to the selected raw material masterbatch;

[0048] A2, material mixing and stirring treatment: put the raw material masterbatch with plasticizer into the mixer and prepare for mixing and stirring;

[0049] A21, set the mixing equipment working parameters and the mixing uniformity identification value range;

[0050] A22, mixing and stirring work, controlling the mixing equipment to stir the plastic masterbatch evenly, during the stirring process, the monitoring plate 3 on the stirring shaft 2 monitors the local resistance of the mixing tank 1 during stirring, and according to the monitored local resistance, adjusts the operation of the vibrating feeding part 5 to make the vibrating feeding part 5 vibrate and heat the area; promotes rapid melting of the local solidification area; and proceeds to the next step after stirring for the set time;

[0051] A23, determining whether the material is stirred evenly; when identifying whether the material is evenly stirred, the multiple stirring units 21 rotate at a set speed, and when rotating, it is identified whether the resistance detected at the multiple stirring units 21 is within the set value range; if so, it is determined that the stirring is evenly stirred, otherwise it is determined that the stirring is uneven;

[0052] If the judgment is no, then return to step A22; if the judgment is uniform, then perform feeding, during which additives are selected and added through the vibrating feeding part 5; when adding, the vibrating feeding part 5 performs graded feeding from top to bottom through multiple vibrating feeding parts 5 (while the stirring shaft 2 rotates at a low speed); when adding additives (liquid additive additives are selected as additives), secondary stirring is performed at a set speed, and during feeding, the fixed beam 51 vibrates and intermittently outputs the liquid additive to promote the diffusion and uniform distribution of the additive; after stirring for a set time, proceed to the next step;

[0053] A25, after the second stirring, determine whether the material is stirred evenly; if so, extrude the material for granulation, otherwise return to step A24;

[0054] A3, after granulation, the particles are screened to select particles of uniform size for the next step of processing;

[0055] A4, conduct quality inspection on the screened particles; qualified particles are packaged.

[0056] In the preparation process of the polyvinyl chloride cable material, the raw materials are mixed evenly before granulation, and the additives can be evenly added during the mixing process.

[0057] The preparation process of this embodiment, by introducing a mixing uniformity identification value range and a local resistance monitoring mechanism, can adjust the mixing process in real time to ensure that the raw materials and the plasticizer are fully mixed, thereby avoiding product performance differences caused by uneven mixing.

[0058] The method of graded feeding by the vibrating feeding part 5 not only ensures the uniformity of the additive feeding, but also improves the dispersion of the additive. This precise control helps to optimize the performance of the cable material and reduce the waste of resources.

[0059] After the additives are added, secondary stirring is performed to further ensure uniform distribution of the additives. During the secondary stirring process, the vibration and intermittent feeding design of the vibrating feeding part 5 promotes the diffusion and distribution of the additives, thereby further improving the quality of the product.

[0060] Second implementation method:

[0061] Figure 2-10 As shown, the mixing device includes a mixing tank 1 with a motor, an extrusion tube is provided at the lower side of the mixing tank 1, and the mixing tank 1 is installed on a bracket, a stirring shaft 2 matching the motor is installed in the mixing tank 1, a transmission belt for driving the stirring shaft 2 to rotate is installed at the power output end of the motor, a plurality of evenly distributed stirring units 21 are installed on the stirring shaft 2, two pairs of stirring blades 22 are fixedly connected to the stirring unit 21, a monitoring board 3 is fixedly connected to the stirring blade 22, and a pressure sensing belt and a temperature sensor are provided on the monitoring board 3;

[0062] An auxiliary frame 4 is connected between one pair of stirring blades 22, and a vibrating feeding part 5 is installed in the middle of the auxiliary frame 4. The vibrating feeding part 5 includes a fixed beam 51, and a plurality of vibrating blocks 52 are slidably arranged at the lower end of the fixed beam 51. A guide tube 53 matching the plurality of vibrating blocks 52 is penetrated in the fixed beam 51, and a plurality of pairs of nozzles are arranged at the side ends of the vibrating blocks 52. A plurality of branch pipes sliding relative to the vibrating blocks 52 are arranged on the guide tube 53. A stirring piece 55 sliding relative to the auxiliary frame 4 is arranged at the upper end of the fixed beam 51, and an electric heating device is installed in the stirring piece 55. An electromagnet 54 for the up and down vibration of the vibrating block 52 and the stirring piece 55 is installed in the fixed beam 51; permanent magnets matching the electromagnet 54 are installed on both the vibrating block 52 and the stirring piece 55; a C-shaped heat-insulating beam is arranged at the connection between the stirring piece 55 and the permanent magnet;

[0063] A plurality of return springs are installed between the vibration block 52 and the stirring piece 55 and the fixed beam 51;

[0064] By turning on the electromagnet 54, the permanent magnets on the vibration block 52 and the stirring piece 55 repel each other and move outward. When the electromagnet 54 is turned off, the vibration block 52 and the stirring piece 55 are reset by the reset spring; the vibration amplitude of the vibration block 52 is adjusted by controlling the power of the electromagnet 54. When the nozzle on the vibration block 52 is exposed, the liquid flowing in the guide pipe 53 can be discharged; a flow valve is provided at the end of the guide pipe 53. By adjusting the flow valve, the liquid input into the guide pipe 53 can be quickly discharged under the action of hydraulic pressure when the nozzle is exposed; when the electromagnet 54 is turned on, the electric heating device heats the stirring piece 55 as a whole, so that the stirring piece 55 vibrates and heats the surrounding materials;

[0065] Optionally, according to production needs, the flow valve can be closed. When liquid is added through the vibration block 52, the vibration block 52 is always open under the push of the fluid to allow continuous addition of liquid. This method of addition uses a larger amount of liquid than the vibration method, and when stirring is obstructed, it is easy to cause rapid accumulation of a large amount of local liquid, which can easily lead to local coagulation. Therefore, when this solution is used normally, the vibration method is used.

[0066] A flow guide channel is provided in each of the stirring unit 21 and the stirring blades 22. An input pipe and an output pipe matching the flow guide channel are installed on the stirring shaft 2. A liquid inlet pipe 23 and a liquid discharge pipe 24 are provided in the stirring shaft 2. The liquid inlet pipe 23 and the liquid discharge pipe 24 are connected to the flow guide channels of the plurality of stirring units 21. The two pairs of stirring blades 22 are X-shaped. The flow guide channels are provided in two stirring blades 22 connected to the auxiliary frame 4. The long sides of the other two stirring blades 22 are provided with chamfers.

[0067] A guide plate 7 is installed at one end of the stirring shaft 2 located outside the mixing tank 1. The guide plate 7 includes an upper disc 71 and a lower disc 72 adjacent to each other. The upper disc 71 and the lower disc 72 are provided with through holes distributed in a circumference. The through holes on the upper disc 71 and the lower disc 72 are respectively connected to the liquid inlet pipe 23 and the liquid discharge pipe 24. A guide box 6 matching the guide plate 7 is installed on the bracket. The guide box 6 is used to regulate the input and output of the liquid in the stirring shaft 2. The guide box 6 is connected to an infusion pump through a catheter. After the liquid is input into the guide box 6, the liquid enters the liquid inlet pipe 23 in the stirring shaft 2 from the upper disc 71, and then enters the guide channel of each stirring unit 21 through the liquid inlet pipe 23. The liquid passes through the stirring blade 22, the guide pipe 53 and another stirring blade 22 along the guide channel in sequence. Finally, the undischarged liquid enters the liquid discharge pipe 24 in the stirring shaft 2 for output;

[0068] An extension shaft is provided at the lower end of the guide plate 7, and the bottom end of the extension shaft is connected to the power output end of the motor through a transmission belt;

[0069] The liquid inlet pipe 23 is arranged in the middle of the stirring shaft 2, and the liquid discharge pipe 24 is sleeved on the outer end of the liquid inlet pipe 23. The liquid discharge pipe 24 is made of heat-conducting material. The liquid flows through the stirring blades 22 and then discharges. During the discharge, the liquid after heat exchange with the material in the mixing tank 1 exchanges heat with the liquid inlet pipe 23 again, so that the liquid in the liquid inlet pipe 23 is preheated, thereby avoiding the input of low-temperature liquid into the mixing tank 1, which causes the local material to cool down and solidify.

[0070] The upper and lower adjacent vibration feeding parts 5 are respectively located in the front, middle and rear sections of the stirring blade 22, and the spacing between two adjacent monitoring plates 3 is 2-10 mm. Every three vibration feeding parts 5 constitute a group, which corresponds to a circular area in the mixing tank 1 during rotation. When local solidification occurs at any position in the circular area, the three vibration feeding parts 5 in the corresponding area can be vibrated and heat treated to make the local solidification and melting.

[0071] Optionally, the monitoring plate 3 includes a pair of C-beams 31 that slide relative to the stirring blades 22, and a side baffle 32 is connected between the pair of C-beams 31. The side ends of the C-beams 31 and the side baffles 32 are covered with pressure sensing belts. The front and rear ends of the stirring blades 22 are both equipped with double-axis electric push rods connected to the side baffles 32. The maximum activity range of the vibration block 52 is within the height range of the monitoring plate 3. The height of the monitoring plate 3 can be adjusted by the double-axis electric push rod, so as to adjust the vertical spacing between the upper and lower adjacent stirring blades 22, so that the solidified local material is not easy to pass through the gap between the upper and lower adjacent stirring blades 22.

[0072] The mixing device of this embodiment can monitor the local resistance of the mixing tank 1 during stirring in real time by means of the pressure sensing belt laid on the monitoring plate 3, so as to accurately judge whether there is local solidification or uneven mixing during the mixing process;

[0073] According to the monitored local resistance, the mixing device can adjust the working state of the vibrating feeding part 5 in real time, vibrate and heat the local solidification area, and effectively solve the unevenness problem in the mixing process.

[0074] The vibrating feeding section 5 can adopt a graded feeding method, which not only ensures the uniformity of the additive feeding, but also improves the dispersibility of the additive, so that the additive can be quickly and evenly dispersed into the material; during the process of adding additives, the vibrating feeding section 5 vibrates the vibration block 52 through the electromagnet 54 to intermittently output the liquid additive, which promotes the diffusion and distribution of the additive and improves the mixing efficiency.

[0075] The design of the stirring unit 21 and the stirring blades 22, as well as the configuration of the liquid inlet pipe 23 and the liquid discharge pipe 24 in the stirring shaft 2, form an efficient mixing, heating and feeding structure.

[0076] This embodiment can provide real-time feedback of information during the mixing process when mixing materials and adding additives, helping operators to promptly identify and handle problems, thereby improving production efficiency and product quality.

[0077] In summary, the mixing equipment of this embodiment has shown significant advantages and outstanding progress in real-time monitoring and precise adjustment, efficient additive delivery, optimized mixing and heating systems, wide coverage of local treatment, and intelligent operation and monitoring, providing strong support for the preparation process of polyvinyl chloride cable materials.

[0078] The third implementation method:

[0079] It also includes a production control system, which includes a processor, and the processor is connected to a data processing module, a monitoring module, a control module and an alarm module;

[0080] The control module is provided with a stirring mode and a feeding mode; the stirring mode is used to control the stirring and mixing work, and the feeding mode is used to control the feeding work;

[0081] The data processing module is used to receive and process the monitoring data from the monitoring module in real time;

[0082] The data processing module determines the uniformity of material mixing and whether there are abnormal conditions such as local solidification based on the monitoring data analysis; according to the analysis results, it sends preset instructions to the control module to adjust the mixing parameters or feeding method;

[0083] The monitoring module is connected to the pressure sensor with a signal, and is used to collect monitoring data of the mixing equipment, including stirring resistance, material temperature and additive dosage.

[0084] When the stirring mode is working, the control module adjusts the speed of the stirring shaft, stirring time, etc. according to the preset stirring parameters to ensure that the materials are fully mixed in the mixing tank. At the same time, the monitoring module monitors the stirring resistance and material temperature in the stirring process in real time through the monitoring plate 3, and analyzes the monitoring data through the data processing module. If it is detected that the local resistance increases abnormally or the material temperature drops, it indicates that local solidification exists. At this time, the data processing module will send an instruction to the control module to adjust the working state of the vibration feeding part 5 near the area, and vibrate and heat the local solidification area to promote rapid melting of the local solidification area. At this time, the stirring shaft 2 can be driven to rotate so that the vibration feeding part 5 is close to the local area, and then the stirring shaft 2 is stopped until the local solidification area melts; the vibration feeding part 5 can also be continuously turned on for vibration and heating when the stirring shaft 2 rotates, and the technical personnel in this field can adjust the working mode of the stirring shaft 2 and the vibration feeding part 5 when processing the local solidification area according to production needs.

[0085] The specific working process of the feeding mode includes: the control module adjusts the vibration frequency, feeding speed and feeding amount of the vibration feeding part 5 according to the preset feeding parameters, and at the same time, the monitoring module monitors the feeding amount of the additive in real time, and the feeding amount is calculated according to the flow difference of the liquid in the liquid inlet pipe 23 and the liquid discharge pipe 24 in the set time period, and the feeding amount data is sent to the data processing module for analysis. When the feeding amount in the set time period does not meet the preset requirements, the working state of the vibration feeding part 5 is adjusted, the vibration frequency is increased and the working time of the electromagnet 54 is extended (that is, the opening time of the electromagnet 54 is extended) to extend the nozzle exposure time when the vibration block 52 vibrates, so as to ensure that the additive is fully fed in the subsequent stirring process;

[0086] In addition, the alarm module is used to send out an alarm signal when abnormal conditions are detected so that operators can find and deal with them in time. For example, when the stirring resistance increases abnormally, the material temperature drops, or the amount of additives does not meet the requirements, the alarm module will send out an audible and visual alarm signal to remind the operator to take appropriate measures.

[0087] Through the application of the above production control system, the preparation process of polyvinyl chloride cable materials can be accurately controlled and monitored to ensure the stable quality and reliable performance of the prepared cable materials. At the same time, the system can also be flexibly adjusted and optimized according to actual needs to meet different production needs.

[0088] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A process for preparing a polyvinyl chloride cable material, characterized in that: The specific steps include: A1, raw material processing, selecting raw material masterbatch, adding plasticizer to the selected raw material masterbatch; A2, material mixing and stirring treatment: the raw material masterbatch with plasticizer added is placed in a mixer and prepared for mixing and stirring; A21, set the mixing equipment working parameters and the mixing uniformity identification value range; A22, mixing and stirring operation, controlling the mixing device to uniformly stir the plastic masterbatch, during the stirring process, monitoring the local resistance of the mixing tank (1) during stirring through the monitoring plate (3) on the stirring shaft (2), adjusting the operation of the vibrating feeding part (5) according to the monitored local resistance, so that the vibrating feeding part (5) vibrates and heats the area, promoting rapid melting of the local solidification area; and proceeding to the next step after stirring for a set time; A23, determining whether the material is stirred uniformly, if it is determined not, returning to step A22; if it is determined to be uniform, performing feeding, selecting additives and adding them through the vibrating feeding section (5); when adding, the vibrating feeding section (5) performs graded feeding from top to bottom through multiple vibrating feeding sections (5); when adding the additives, secondary stirring is performed at a set speed, and when adding, the vibrating feeding section (5) vibrates and intermittently outputs the liquid additive to promote the diffusion and uniform distribution of the additive; after stirring for a set time, proceed to the next step; A25, after the second stirring, determine whether the material is stirred evenly; if so, extrude the material for granulation, otherwise return to step A24; A3, after granulation, the particles are screened to select particles of uniform size for the next step of processing; A4, conduct quality inspection on the screened particles; qualified particles are packaged.

2. The process for preparing a polyvinyl chloride cable material according to claim 1, characterized in that: The mixing device comprises a mixing tank (1) with a motor, and the mixing tank (1) is mounted on a bracket, a stirring shaft (2) matching the motor is mounted in the mixing tank (1), a plurality of evenly distributed stirring units (21) are mounted on the stirring shaft (2), two pairs of stirring blades (22) are fixedly connected to the stirring units (21), a monitoring board (3) is fixedly connected to the stirring blades (22), and a pressure sensing belt and a temperature sensor are arranged on the monitoring board (3); An auxiliary frame (4) is connected between one pair of the stirring blades (22); a vibrating feeding section (5) is installed in the middle of the auxiliary frame (4); the vibrating feeding section (5) comprises a fixed beam (51); a plurality of vibrating blocks (52) are slidably arranged at the lower end of the fixed beam (51); a guide tube (53) matching the plurality of vibrating blocks (52) is passed through the fixed beam (51); a plurality of pairs of nozzles are arranged at the side ends of the vibrating blocks (52); a plurality of branch pipes sliding relative to the vibrating blocks (52) are arranged on the guide tube (53); a stirring sheet (55) sliding relative to the auxiliary frame (4) is arranged at the upper end of the fixed beam (51); an electric heating device is installed in the stirring sheet (55); and an electromagnet (54) for vibrating the vibrating blocks (52) up and down is installed in the fixed beam (51); The stirring unit (21) and the stirring blade (22) are provided with flow guide channels, the stirring shaft (2) is provided with a liquid inlet pipe (23) and a liquid discharge pipe (24), the liquid inlet pipe (23) and the liquid discharge pipe (24) are communicated with the flow guide channels of the plurality of stirring units (21), a flow guide plate (7) is installed at one end of the stirring shaft (2) located outside the mixing tank (1), the flow guide plate (7) comprises an upper disc (71) and a lower disc (72) adjacent to each other, the upper disc (71) and the lower disc (72) are provided with through holes distributed in a circumference, the through holes on the upper disc (71) and the lower disc (72) are communicated with the liquid inlet pipe (23) and the liquid discharge pipe (24) respectively, and a flow guide box (6) matching the flow guide plate (7) is installed on the bracket, the flow guide box (6) is used to control the input and output of liquid in the stirring shaft (2).

3. The process for preparing a polyvinyl chloride cable material according to claim 2, characterized in that: When identifying whether the material is uniform in A23, the multiple stirring units (21) rotate at a set speed, and when rotating, it is identified whether the resistance detected at the multiple stirring units (21) is within the set value range; if so, it is determined that the stirring is uniform; otherwise, it is determined that the stirring is uneven.

4. The process for preparing a polyvinyl chloride cable material according to claim 2, characterized in that: The liquid inlet pipe (23) is arranged in the middle of the stirring shaft (2), and the liquid discharge pipe (24) is sleeved on the outer end of the liquid inlet pipe (23), and the liquid discharge pipe (24) is made of a heat-conducting material.

5. The process for preparing a polyvinyl chloride cable material according to claim 2, characterized in that: The three vertically adjacent vibration feeding parts (5) are respectively located at the front, middle and rear sections of the stirring blade (22), and the distance between the vertically adjacent two monitoring plates (3) is 2-10 mm.

6. The process for preparing a polyvinyl chloride cable material according to claim 2, characterized in that: The two pairs of stirring blades (22) are in an X shape, the guide channel is opened in the two stirring blades (22) connected to the auxiliary frame (4), and the long sides of the other two stirring blades (22) are both chamfered.

7. The process for preparing a polyvinyl chloride cable material according to claim 2, characterized in that: The monitoring plate (3) comprises a pair of C-shaped beams (31) that slide relative to the stirring blades (22); a side baffle (32) is connected between the pair of C-shaped beams (31); side ends of the C-shaped beams (31) and the side baffles (32) are provided with pressure sensing belts; both front and rear ends of the stirring blades (22) are provided with double-axis electric push rods that are connected to the side baffles (32); and the maximum range of movement of the vibration block (52) is within the height range of the monitoring plate (3).

8. The process for preparing a polyvinyl chloride cable material according to claim 2, characterized in that: It also includes a production control system, which includes a processor, and the processor is connected to a data processing module, a monitoring module, a control module and an alarm module; The control module is provided with a stirring mode and a feeding mode; the stirring mode is used to control the stirring and mixing work, and the feeding mode is used to control the feeding work; The data processing module analyzes the monitoring data to determine the uniformity of material mixing and whether there are abnormal conditions such as local solidification; according to the analysis results, it sends preset instructions to the control module to adjust the mixing parameters or feeding method; The monitoring module is connected to the pressure sensor with a signal, and is used to collect monitoring data of the mixing device, wherein the monitoring data includes stirring resistance, material temperature and additive dosage.

9. The process for preparing a polyvinyl chloride cable material according to claim 7, characterized in that: The specific working process of the stirring mode includes: the control module adjusts the rotation speed, stirring time, etc. of the stirring shaft according to the preset stirring parameters to ensure that the materials are fully mixed in the mixing tank; at the same time, the monitoring module monitors the stirring resistance and material temperature in real time during the stirring process through the monitoring plate (3); when the local resistance is abnormally increased or the material temperature drops, it is determined that the data corresponds to local solidification, and the working state of the vibrating feeding part (5) near the local area is adjusted to vibrate and heat the local solidification area.

10. The process for preparing a polyvinyl chloride cable material according to claim 8, characterized in that: The specific working process of the feeding mode includes: the control module controls the vibration frequency, feeding speed and feeding amount of the vibrating feeding part (5) according to the preset feeding parameters; at the same time, the monitoring module monitors the feeding amount of the additive in real time and sends the feeding amount data to the data processing module for analysis; when the feeding amount in the set time period does not meet the preset requirements, the working state of the vibrating feeding part (5) is adjusted, the vibration frequency is increased and the working time of the electromagnet (54) is extended, so as to extend the nozzle exposure time when the vibration block (52) vibrates.

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