A vulcanized tube bending device for extruding a rubber cable and a method of operating the same

Abstract

The application discloses a vulcanized pipe bending device for rubber-sheathed cable extrusion and an operation method thereof, which comprises a heat preservation assembly, a heating conduction assembly, a pipe bending assembly, a vulcanized pipe and a PLC control system; the device can effectively improve the uniformity and consistency of bending of each point of the vulcanized pipe, realize precise bending and shaping effects of the vulcanized pipe, and according to the bending angle of the vulcanized pipe, the vertical displacement of multiple points relative to the center line can be calculated, so that the process requirements of the bending deformation of the vulcanized pipe are met; compared with the press bending mode of the traditional rubber-sheathed cable vulcanized pipe, the application adopts the combined mode of hot bending and cold bending, preliminarily forms through hot processing, reduces the hardness by using the plasticity, and then accurately forms through cold processing, so that the problems such as cracks of the material are avoided; through the operation method of the device, the deformation of the vulcanized pipe is uniform in the whole bending deformation process, the product quality is ensured, and the process requirements of the bending deformation of the vulcanized pipe are met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of rubber-sheathed cable production, and particularly relates to a vulcanization pipe bending device for rubber-sheathed cable extrusion and an operation method thereof. BACKGROUND

[0002] The rubber-sheathed cable mainly refers to a rubber-sheathed cable, and its main use is to transmit or distribute power signals in the power, petrochemical, metallurgical and other industries. The vulcanization process is one of the important processes of the rubber-sheathed cable, and its main function is to enhance the pressure resistance and wear resistance of the rubber sheath, so as to ensure the service life and reliability of the rubber-sheathed cable.

[0003] In the related art, the production and manufacturing technology of the rubber-sheathed cable product is still completed by relying on the traditional continuous vulcanization type production equipment, that is, the cable is continuously produced in a closed continuous vulcanization pipeline. Since the rubber-sheathed cable production environment exists in high-temperature and high-pressure steam in the closed vulcanization pipe, and corrosive chemicals are generated during the vulcanization process, the vulcanization pipe is corroded, and holes are formed after a long time of accumulation, thereby affecting the vulcanization quality of the cable. Therefore, the vulcanization pipe needs to be replaced regularly. At present, the vulcanization pipe is mainly made of stainless steel pipe and needs to be bent and shaped into a certain size. The angles of each section of the vulcanization pipe are inconsistent, and the bending angle of the vulcanization pipe cannot meet the process requirements, which needs to be corrected multiple times, resulting in a long processing cycle and low efficiency. At the same time, the price of the purchased bent pipe is high, the delivery cycle is long, and the bending angle cannot meet the process requirements. SUMMARY

[0004] The present application aims to provide a vulcanization pipe bending device for rubber-sheathed cable extrusion and an operation method thereof, so as to solve at least one aspect of the problems and defects in the background art.

[0005] Specifically, the present application discloses a vulcanization pipe bending device for rubber-sheathed cable extrusion, comprising:

[0006] a heat preservation assembly, a heating and conducting assembly, a bent pipe assembly, a vulcanization pipe and a PLC control system;

[0007] The heat preservation assembly comprises a shell, and the heating and conducting assembly and the bent pipe assembly are arranged in the shell.

[0008] The heating and conducting assembly comprises a first heat transfer pipe, a second heat transfer pipe and a heating device.

[0009] One end of the first heat transfer pipe is connected with one end of the heating device, the other end of the first heat transfer pipe is connected with one end of the vulcanization pipe, one end of the second heat transfer pipe is connected with the other end of the heating device, and the other end of the second heat transfer pipe is connected with the other end of the vulcanization pipe.

[0010] The bending pipe assembly comprises a plurality of sets of hydraulic pressing die devices;

[0011] The heating belts are arranged on the vulcanizing pipe and between the adjacent sets of the hydraulic pressing die devices.

[0012] The vulcanizing pipe bending device for rubber-sheathed cable extrusion has at least the following beneficial effects:

[0013] The vulcanizing pipe bending device for rubber-sheathed cable extrusion utilizes the heating device to transfer the heat of the first heat transfer pipe and the second heat transfer pipe to the vulcanizing pipe, and forms a circulating heating channel, thereby ensuring uniform heating. The heating belts are used to heat the outside of the vulcanizing pipe, thereby enhancing the heating effect of the outside of the vulcanizing pipe. The heat conduction assembly, the bending pipe assembly and the vulcanizing pipe are insulated by the insulation assembly, thereby further ensuring the constant temperature condition of the vulcanizing pipe after heating. The vulcanizing pipe in a hot state is pressurized by the plurality of sets of hydraulic pressing die devices, so that the vulcanizing pipe is bent and deformed. The uniformity and consistency of the bending of each point of the vulcanizing pipe can be effectively improved, the precise bending and shaping effect of the vulcanizing pipe can be achieved, and the vertical displacement of multiple points relative to the center line can be calculated according to the bending angle of the vulcanizing pipe by the linear expansion formula: Δd = d × α × ΔT, β = 3α (d is the original thickness, Δd is the deformation amount, α is the linear expansion coefficient, β is the volume expansion coefficient, and ΔT is the temperature change amount), thereby meeting the process requirements of the bending deformation amount of the vulcanizing pipe.

[0014] The plurality of sets of hydraulic pressing die devices of the bending pipe assembly are used to cold-press the vulcanizing pipe after heating, so that the vulcanizing pipe is pressed multiple times by the plurality of sets of hydraulic pressing die devices, and gradually deformed. Compared with the bending mode of the traditional rubber-sheathed cable vulcanizing pipe, the combination of hot-state bending and cold-state bending is adopted, so that the high precision is ensured, the adverse effects of residual stress on the material are effectively reduced, the grain structure of the material is refined, the comprehensive mechanical properties of the material are improved, and the shape of the material is more consistent with the expectation. The material is initially formed by hot-state processing, the hardness is reduced by using the plasticity, and then the material is accurately formed by cold-state processing, thereby effectively avoiding the problems such as cracks of the material.

[0015] As a further scheme of the present application, the bending pipe assembly further comprises a support seat, a lower support and an upper support, and the plurality of sets of hydraulic pressing die devices are mirror-imaged and staggered on the lower support and the upper support.

[0016] Due to the fact that the bending pipe assembly further comprises a support base, a lower support and an upper support, and a plurality of sets of hydraulic pressing devices are arranged in mirror image and staggered on the lower support and the upper support, so that the support base, the lower support and the plurality of sets of hydraulic pressing devices on the lower support can effectively support the pressure generated by the plurality of sets of hydraulic pressing devices on the upper support during operation, ensuring the stability of the vulcanized pipe during the bending process and being able to more accurately control the bending deformation of the vulcanized pipe, thereby improving the processing precision and quality of the product.

[0017] As a further scheme of the present application: each of the plurality of sets of hydraulic pressing devices comprises a hydraulic oil cylinder, a thrust ball bearing is arranged at the bottom of the hydraulic oil cylinder, a bending pipe pressing die is arranged at the bottom of the thrust ball bearing, the vulcanized pipe is arranged on the bending pipe pressing die of the plurality of sets of hydraulic pressing devices of the lower support, and a plurality of temperature sensors are arranged on the vulcanized pipe.

[0018] As a further scheme of the present application: the bending pipe assembly further comprises a plurality of sets of lifting devices, each of the lifting devices is provided with a transmission screw rod, a transmission nut is arranged at the upper part of the transmission screw rod, one side of the transmission nut is connected with one side of the upper support, a support block is arranged at the lower part of the transmission screw rod, and one side of the support block is connected with one side of the lower support.

[0019] As a further scheme of the present application: a servo motor is arranged at the bottom of the transmission screw rod, a coupling is arranged at the upper part of the servo motor, and one side of the servo motor is connected with one side of the support base.

[0020] Since several groups of hydraulic pressure molding devices all include hydraulic oil cylinders, the bottom of the hydraulic oil cylinder is rotationally provided with a thrust ball bearing, and the bottom of the thrust ball bearing is provided with a bent pipe pressure mold, the vulcanization pipe is arranged on the bent pipe pressure mold of the several groups of hydraulic pressure molding devices of the lower support, and the vulcanization pipe is provided with several temperature sensors; the bent pipe assembly further includes several groups of lifting devices, the lifting device is provided with a transmission screw rod, the upper part of the transmission screw rod is provided with a transmission nut, one side of the transmission nut is connected with one side of the upper support, the lower part of the transmission screw rod is provided with a support block, and one side of the support block is connected with one side of the lower support; the bottom of the transmission screw rod is provided with a servo motor, the upper part of the servo motor is provided with a shaft coupling, and one side of the servo motor is connected with one side of the support seat; the angle of the bent pipe pressure mold can be adjusted through the thrust ball bearing of the hydraulic pressure molding device, so that the bent pipe pressure mold can be adjusted according to the end face of the vulcanization pipe, the axial positioning of the vulcanization pipe is realized, and the upper and lower end faces of the bent pipe pressure mold and the vulcanization pipe are matched; and the upper support and the several groups of hydraulic pressure molding devices on the upper support are driven to move downward at the same time through the several groups of lifting devices, so that the bent pipe pressure mold of the several groups of hydraulic pressure molding devices of the upper support is pressed on the upper end of the vulcanization pipe; pressure is gradually applied to the upper end of the vulcanization pipe through the several groups of hydraulic pressure molding devices of the upper support; and since the several groups of hydraulic pressure molding devices of the lower support and the several groups of hydraulic pressure molding devices of the upper support are mirror image and staggered, the several groups of hydraulic pressure molding devices of the lower support generate a reaction force under the pressure applied by the several groups of hydraulic pressure molding devices of the upper support, so that the vulcanization pipe gradually deforms to realize the bending deformation of the vulcanization pipe meeting the process requirements.

[0021] The vulcanization pipe bending device for rubber jacketed cable extrusion effectively improves the accurate control of the bending deformation of the vulcanization pipe, can adapt to the process requirements of bending deformation of different vulcanization pipes, effectively enhances the adaptability and operation convenience, and optimizes the control of the deformation amount compared with the traditional vulcanization pipe bending deformation mode, thereby effectively improving the product quality of the rubber jacketed cable.

[0022] As a further scheme of the present application: the bent pipe pressure mold is provided with an arc surface close to one end of the vulcanization pipe, and the bent pipe pressure mold is connected with the vulcanization pipe through the arc surface.

[0023] As a further scheme of the present application: the arc surface of the bent pipe pressure mold at the upper end of the vulcanization pipe is sequentially provided with a first smooth bending area, a first forming bending area and a first correction shaping area from high to low along the axial direction of the vulcanization pipe, the arc surface of the bent pipe pressure mold at the lower end of the vulcanization pipe is sequentially provided with a second smooth bending area, a second forming bending area and a second correction shaping area from low to high along the axial direction of the vulcanization pipe, and the first smooth bending area, the first forming bending area and the first correction shaping area are respectively correspondingly arranged with the second smooth bending area, the second forming bending area and the second correction shaping area.

[0024] The curved pipe pressing die is connected with the vulcanizing pipe through the arc surface due to the arc surface arranged on the end of the curved pipe pressing die close to the vulcanizing pipe; the arc surface of the curved pipe pressing die at the upper end of the vulcanizing pipe is sequentially provided with a first smooth bending area, a first forming bending area and a first correction and shaping area from high to low along the axial direction of the vulcanizing pipe, the arc surface of the curved pipe pressing die at the lower end of the vulcanizing pipe is sequentially provided with a second smooth bending area, a second forming bending area and a second correction and shaping area from low to high along the axial direction of the vulcanizing pipe, and the first smooth bending area, the first forming bending area and the first correction and shaping area are correspondingly arranged with the second smooth bending area, the second forming bending area and the second correction and shaping area; the first smooth bending area and the second smooth bending area are the first area of the bending deformation of the vulcanizing pipe, and the vulcanizing pipe is slightly deformed when being pressed 1-3 times by the hydraulic pressing die device; the first forming bending area and the second forming bending area are the second area of the bending deformation of the vulcanizing pipe, and the bending angle of the vulcanizing pipe meets the process requirements when being pressed 3-5 times by the hydraulic pressing die device; the first correction and shaping area and the second correction and shaping area are the third area of the bending deformation of the vulcanizing pipe, and the bending angle of the vulcanizing pipe is corrected and shaped when being pressed 6-8 times by the hydraulic pressing die device, so as to prevent the rebound deformation of the bending angle of the vulcanizing pipe; the bending deformation of the vulcanizing pipe is gradually performed through the three different areas, each area corresponds to different pressing times and deformation requirements, so that the shape and angle of the vulcanizing pipe finally meet the process requirements, the bending deformation precision and efficiency of the vulcanizing pipe are ensured, and the product quality of the rubber jacketed cable is ensured.

[0025] As a further scheme of the present application: the upper support is provided with a plurality of through holes, and the hydraulic oil cylinders of the plurality of groups of hydraulic pressing die devices of the upper support are respectively arranged in the through holes of the upper support.

[0026] Since the upper support is provided with a plurality of through holes, and the hydraulic oil cylinders of the plurality of groups of hydraulic pressing die devices of the upper support are respectively arranged in the through holes of the upper support, the plurality of groups of hydraulic pressing die devices of the upper support are connected with the upper support through the hydraulic oil cylinders to form an integral whole, the upper support and the plurality of groups of hydraulic pressing die devices on the upper support are simultaneously lifted by the plurality of lifting devices, the curved pipe pressing die of the plurality of groups of hydraulic pressing die devices of the upper support exerts pressure on the vulcanizing pipe to realize the bending deformation of the vulcanizing pipe, the stability and consistency of the bending process of the vulcanizing pipe are effectively enhanced, the bending deformation precision of the vulcanizing pipe is accurately controlled, and the bending deformation of the vulcanizing pipe meets the production process conditions of the rubber jacketed cable.

[0027] As a further scheme of the present application: the side of the lower support and the side of the upper support are respectively provided with an induction plate corresponding to the plurality of groups of hydraulic pressing die devices, and the curved pipe pressing die is provided with a displacement sensor, and the induction plate and the displacement sensor are correspondingly arranged.

[0028] Due to the fact that one side of the lower support and one side of the upper support are respectively provided with induction plates corresponding to a plurality of sets of hydraulic pressing device, the pipe bending mold is provided with displacement sensors, the induction plates and the displacement sensors are correspondingly arranged, the deformation amount of each point of the vulcanized pipe can be transmitted through the induction plates on one side of the lower support and the displacement sensors of the pipe bending mold of the plurality of sets of hydraulic pressing device on the lower support, and the induction plates on one side of the upper support and the displacement sensors of the pipe bending mold of the plurality of sets of hydraulic pressing device on the upper support, the bending deformation condition of the vulcanized pipe can be captured in real time, the stability and controllability of the bending deformation process of the vulcanized pipe are ensured, the processing precision is improved, and the product quality of the rubber-sheathed cable is ensured.

[0029] The second aspect of the present application also discloses an operating method of the vulcanized pipe bending device for rubber-sheathed cable extrusion, comprising the following steps:

[0030] S1, start the heating device, heat the temperature of the vulcanized pipe to 175-185 DEG C and keep warm;

[0031] S2, adjust the height of the upper support by using the lifting device, so that the arc surface of the pipe bending mold of the plurality of sets of hydraulic pressing device on the upper support is pressed on the upper end of the vulcanized pipe;

[0032] S3, when the vulcanized pipe is pressed 1-3 times, the bending degree of the vulcanized pipe is between the first smooth bending area and the second smooth bending area; when pressed 3-5 times, the bending degree of the vulcanized pipe is between the first forming bending area and the second forming bending area; when pressed 6-8 times, the bending degree of the vulcanized pipe is between the first correction and shaping area and the second correction and shaping area;

[0033] S4, the vulcanized pipe is pressed once every 1 hour, the stable pressing state is stabilized, and then the pressing is continued; the pressing distance is confirmed according to the bending point of the vulcanized pipe each time, and the PLC control system makes the pipe bending mold of the plurality of sets of hydraulic pressing device of the lower support and the pipe bending mold of the plurality of sets of hydraulic pressing device of the upper support reach synchronous pressing and retraction according to the feedback of the displacement sensor.

[0034] Through the operating method of the vulcanized pipe bending device for rubber-sheathed cable extrusion, the vulcanized pipe is gradually heated to 175-185 DEG C and kept warm, so that the vulcanized pipe is processed in a constant temperature state, the influence of temperature fluctuation on the material performance is avoided, the pipe bending mold of the hydraulic pressing device is used to gradually press the vulcanized pipe, the vulcanized pipe is slightly deformed through the first smooth bending area and the second smooth bending area, the vulcanized pipe forms the required bending degree through the first forming bending area and the second forming bending area, and finally the vulcanized pipe is corrected and shaped through the first correction and shaping area and the second correction and shaping area, so that the bending deformation process of the vulcanized pipe is greatly optimized, and the deformation of the vulcanized pipe is uniform in the whole bending deformation process, so that the product quality is ensured;

[0035] Through the feedback of the displacement sensor, the PLC control system realizes the synchronous pressing and retraction of the several groups of hydraulic pressing devices of the upper support and the several groups of hydraulic pressing devices of the lower support, ensures the stability and consistency of the bending of each point of the vulcanization pipe, and can efficiently complete the bending deformation process of the vulcanization pipe, and meets the process requirements of the bending deformation amount of the vulcanization pipe. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to facilitate those skilled in the art to understand, the present application is further described below in combination with the drawings.

[0037] Figure 1 It is a schematic diagram of the overall structure of a vulcanization pipe bending device for rubber jacketed cable extrusion;

[0038] Figure 2 It is a schematic diagram of the partial structure of a vulcanization pipe bending device for rubber jacketed cable extrusion;

[0039] Figure 3 It is a schematic diagram of the bending pipe assembly structure of a vulcanization pipe bending device for rubber jacketed cable extrusion;

[0040] Figure 4 It is Figure 2 the partial enlarged view of A of the figure;

[0041] Figure 5 It is an exploded schematic diagram of a hydraulic pressing device of a vulcanization pipe bending device for rubber jacketed cable extrusion;

[0042] Figure 6 It is Figure 2 the partial enlarged view of B of the figure;

[0043] Figure 7 It is a schematic diagram of the bending pipe pressing structure of the upper support hydraulic pressing device of a vulcanization pipe bending device for rubber jacketed cable extrusion;

[0044] Figure 8 It is Figure 7 the side view structure sectional view of the figure;

[0045] Figure 9 It is a schematic diagram of the bending pipe pressing structure of the lower support hydraulic pressing device of a vulcanization pipe bending device for rubber jacketed cable extrusion;

[0046] Figure 10 It is Figure 9 the side view structure sectional view of the figure;

[0047] Figure 11 It is a schematic diagram of the structure before the bending deformation of the vulcanization pipe;

[0048] Figure 12 It is a schematic diagram of the structure after the bending deformation of the vulcanization pipe;

[0049] Figure 13 Schematic diagram of bending deformation amount of each point of vulcanization tube;

[0050] Figure 14 Schematic diagram of overall structure of rubber sheathed cable vulcanization extrusion production line.

[0051] Reference signs:

[0052] 1, heat preservation assembly; 11, shell; 2, heating conduction assembly; 21, first heat transfer pipe; 22, second heat transfer pipe; 23, heating device; 24, heating belt; 3, elbow assembly; 31, hydraulic die device; 311, hydraulic oil cylinder; 312, thrust ball bearing; 313, elbow die; 3131, first smooth bending area; 3132, first forming bending area; 3133, first correction shaping area; 3134, second smooth bending area; 3135, second forming bending area; 3136, second correction shaping area; 314, displacement sensor; 32, support seat; 33, lower support; 34, upper support; 35, lifting device; 351, transmission screw; 352, transmission nut; 353, support block; 354, servo motor; 355, shaft coupling; 36, induction plate; 4, vulcanization tube; 41, temperature sensor. DETAILED DESCRIPTION

[0053] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application are further specifically described below in conjunction with the drawings. In the description, identical or similar reference numerals indicate identical or similar components. The following description of the embodiments of the present application with reference to the drawings is intended to explain the general inventive concept of the present application, and should not be understood as a limitation of the present application.

[0054] In addition, in the following detailed description, many specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It is apparent, however, that one or more embodiments can be practiced without these specific details. In other instances, well-known structures and devices are presented in a diagrammatic fashion to simplify the drawings.

[0055] As Figures 1-14The vulcanizing pipe bending device for rubber sheathed cable extrusion comprises a heat preservation assembly 1, a heating conduction assembly 2, a pipe bending assembly 3, a vulcanizing pipe 4 and a PLC control system.

[0056] Specifically, the vulcanizing pipe bending device for rubber sheathed cable extrusion utilizes the heating device 23 to transmit the heat of the first heat conduction pipe 21 and the second heat conduction pipe 22 to the vulcanizing pipe 4, and forms a circulating heating channel, so as to ensure uniform heating; and the heating band 24 is utilized to heat the outside of the vulcanizing pipe 4, so as to enhance the heating effect of the outside of the vulcanizing pipe 4; at the same time, the heating conduction assembly 2, the pipe bending assembly 3 and the vulcanizing pipe 4 are heat preserved by the heat preservation assembly 1, so as to further ensure the constant temperature condition of the vulcanizing pipe 4 after heating; the vulcanizing pipe 4 in a hot state is pressurized by the plurality of sets of hydraulic pressing die devices 31, so as to generate bending deformation; the uniformity and consistency of bending of each point of the vulcanizing pipe 4 can be effectively improved, the precise bending and shaping effect of the vulcanizing pipe 4 is realized, and according to the bending angle of the vulcanizing pipe 4, the vertical displacement of a plurality of point positions relative to the center line can be calculated by the linear expansion formula: Δd = d × α × ΔT, β = 3α (d is the original thickness, Δd is the deformation amount, α is the linear expansion coefficient, β is the volume expansion coefficient, and ΔT is the temperature change amount), so as to meet the process requirement of the bending deformation amount of the vulcanizing pipe;

[0057] The vulcanizing pipe 4 is cold-pressed by the plurality of sets of hydraulic pressing die devices 31 after heating, so that the vulcanizing pipe 4 is pressed multiple times by the plurality of sets of hydraulic pressing die devices 31, and gradually generates bending deformation; compared with the bending mode of the traditional rubber sheathed cable vulcanizing pipe, the combination mode of hot-state bending and cold-state bending is adopted, so that the higher precision is ensured, the adverse effects of residual stress on the material are effectively reduced, the grain organization of the material is refined, the comprehensive mechanical properties of the material are improved, the shape of the material is more in line with the expectation, the hardness is reduced by utilizing the plasticity after hot-state processing and preliminary forming, and then the material is accurately formed by cold-state processing, so that the problems such as cracks of the material are effectively avoided.

[0058] As Figure 2 and Figure 3As shown, the bending pipe assembly 3 further comprises a support base 32, a lower support 33 and an upper support 34, and a plurality of sets of hydraulic pressing devices 31 are mirror-imaged and staggered on the lower support 33 and the upper support 34.

[0059] Specifically, since the bending pipe assembly 3 further comprises the support base 32, the lower support 33 and the upper support 34, and the plurality of sets of hydraulic pressing devices 31 are mirror-imaged and staggered on the lower support 33 and the upper support 34, the support base 32, the lower support 33 and the plurality of sets of hydraulic pressing devices 31 on the lower support 33 can effectively support the pressure generated by the upper support 34 and the plurality of sets of hydraulic pressing devices 31 on the upper support 34 during operation, ensuring the stability of the vulcanized pipe 4 during the bending process, and enabling more precise control of the bending deformation of the vulcanized pipe, thereby improving the processing precision and quality of the product.

[0060] As shown, Figures 3-6 As shown, each of the plurality of sets of hydraulic pressing devices 31 comprises a hydraulic oil cylinder 311, the bottom of the hydraulic oil cylinder 311 is rotatably provided with a thrust ball bearing 312, the bottom of the thrust ball bearing 312 is provided with a bending pipe pressing die 313, the vulcanized pipe 4 is arranged on the bending pipe pressing die 313 of each set of hydraulic pressing device 31 of the lower support 33, and a plurality of temperature sensors 41 are arranged on the vulcanized pipe 4; the bending pipe assembly 3 further comprises a plurality of sets of lifting devices 35, each lifting device 35 is provided with a transmission screw rod 351, the upper part of the transmission screw rod 351 is provided with a transmission nut 352, one side of the transmission nut 352 is connected with one side of the upper support 34, the lower part of the transmission screw rod 351 is provided with a support block 353, one side of the support block 353 is connected with one side of the lower support 33; the bottom of the transmission screw rod 351 is provided with a servo motor 354, the upper part of the servo motor 354 is provided with a shaft coupling 355, one side of the servo motor 354 is connected with one side of the support base 32.

[0061] Specifically, since the several groups of hydraulic pressing die devices 31 each include a hydraulic oil cylinder 311, the hydraulic oil cylinder 311 is rotationally provided with a thrust ball bearing 312 at the bottom, the thrust ball bearing 312 is provided with a bent pipe pressing die 313 at the bottom, the vulcanization pipe 4 is arranged on the bent pipe pressing die 313 of the several groups of hydraulic pressing die devices 31 of the lower support 33, and the several temperature sensors 41 are arranged on the vulcanization pipe 4; the bent pipe assembly 3 further includes several groups of lifting devices 35, the lifting device 35 is provided with a transmission screw rod 351, the transmission screw rod 351 is provided with a transmission nut 352 at the upper portion, one side of the transmission nut 352 is connected with one side of the upper support 34, the transmission screw rod 351 is provided with a support block 353 at the lower portion, one side of the support block 353 is connected with one side of the lower support 33; the transmission screw rod 351 is provided with a servo motor 354 at the bottom, the servo motor 354 is provided with a shaft coupling 355 at the upper portion, one side of the servo motor 354 is connected with one side of the support seat 32; the angle of the bent pipe pressing die 313 can be adjusted through the thrust ball bearing 312 of the hydraulic pressing die device 31, so that the bent pipe pressing die 313 can be adjusted according to the end face of the vulcanization pipe 4, the axial positioning of the vulcanization pipe 4 is realized, and the bent pipe pressing die 313 is adapted to the upper and lower end faces of the vulcanization pipe 4; and the upper support 34 and the several groups of hydraulic pressing die devices 31 on the upper support are simultaneously moved downward through the several groups of lifting devices 35, so that the bent pipe pressing die 313 of the several groups of hydraulic pressing die devices 31 of the upper support 34 is pressed on the upper end of the vulcanization pipe 4; the pressure is gradually applied to the upper end of the vulcanization pipe 4 through the several groups of hydraulic pressing die devices 31 of the upper support 34; and since the several groups of hydraulic pressing die devices 31 of the lower support 33 and the several groups of hydraulic pressing die devices 31 of the upper support 34 are mirror-imaged and staggered, the several groups of hydraulic pressing die devices 31 of the lower support 33 generate a reaction force under the pressure applied by the several groups of hydraulic pressing die devices 31 of the upper support 34, so that the vulcanization pipe 4 gradually deforms to realize the vulcanization pipe 4 that is bent and deformed according to the process requirements.

[0062] The vulcanization pipe bending device for rubber jacketed cable extrusion provided by the application effectively improves the accurate control of the bending deformation of the vulcanization pipe 4, can adapt to the process requirements of the bending deformation of different vulcanization pipes 4, effectively enhances the adaptability and operation convenience, optimizes the control of the deformation amount compared with the traditional vulcanization pipe bending deformation mode, and effectively improves the product quality of the rubber jacketed cable.

[0063] As Figures 7-10As shown, the curved pipe pressing die 313 is provided with an arc surface near one end of the vulcanized pipe 4, and the curved pipe pressing die 313 is connected with the vulcanized pipe 4 through the arc surface; the arc surface of the curved pipe pressing die 313 at the upper end of the vulcanized pipe 4 is sequentially provided with a first smooth bending area 3131, a first forming bending area 3132 and a first correction shaping area 3133 from high to low along the axial direction of the vulcanized pipe 4, and the arc surface of the curved pipe pressing die 313 at the lower end of the vulcanized pipe 4 is sequentially provided with a second smooth bending area 3134, a second forming bending area 3135 and a second correction shaping area 3136 from low to high along the axial direction of the vulcanized pipe 4, and the first smooth bending area 3131, the first forming bending area 3132 and the first correction shaping area 3133 are respectively arranged corresponding to the second smooth bending area 3134, the second forming bending area 3135 and the second correction shaping area 3136.

[0064] Specifically, since the curved pipe pressing die 313 is provided with an arc surface near one end of the vulcanized pipe 4, and the curved pipe pressing die 313 is connected with the vulcanized pipe 4 through the arc surface; the arc surface of the curved pipe pressing die 313 at the upper end of the vulcanized pipe 4 is sequentially provided with a first smooth bending area 3131, a first forming bending area 3132 and a first correction shaping area 3133 from high to low along the axial direction of the vulcanized pipe 4, and the arc surface of the curved pipe pressing die 313 at the lower end of the vulcanized pipe 4 is sequentially provided with a second smooth bending area 3134, a second forming bending area 3135 and a second correction shaping area 3136 from low to high along the axial direction of the vulcanized pipe 4, and the first smooth bending area 3131, the first forming bending area 3132 and the first correction shaping area 3133 are respectively arranged corresponding to the second smooth bending area 3134, the second forming bending area 3135 and the second correction shaping area 3136; the first smooth bending area 3131 and the second smooth bending area 3134 are the first area of the bending deformation of the vulcanized pipe 4, and the vulcanized pipe 4 is slightly deformed when the hydraulic pressing die device 31 is pressed 1-3 times; the first forming bending area 3132 and the second forming bending area 3135 are the second area of the bending deformation of the vulcanized pipe 4, and the bending angle of the vulcanized pipe 4 meets the process requirements when the hydraulic pressing die device 31 is pressed 3-5 times; the first correction shaping area 3133 and the second correction shaping area 3136 are the third area of the bending deformation of the vulcanized pipe 4, and the bending angle of the vulcanized pipe 4 is corrected and shaped when the hydraulic pressing die device 31 is pressed 6-8 times, preventing the bending angle of the vulcanized pipe 4 from rebounding and deforming; through the three different areas, each area corresponds to different pressing times and deformation requirements, so that the bending deformation of the vulcanized pipe 4 is gradually performed, and finally the shape and angle meet the process requirements, ensuring the bending deformation precision and efficiency of the vulcanized pipe 4 and ensuring the quality of the rubber jacketed cable product.

[0065] The hydraulic cylinder 311 directly drives the bending die 313, so the hydraulic pressure of the hydraulic cylinder 311 drives the deformation force, and the hydraulic pressure from the first smooth bending area 3131, the second smooth bending area 3134, to the first forming bending area 3132, the second forming bending area 3135, and then to the first correction shaping area 3133, the second correction shaping area 3136 is gradually increased.

[0066] The force and deformation situation driven by the center point of the vulcanizing pipe 4 alone hydraulic pressure is calculated as follows:

[0067] Bending load: q is the load,

[0068] Sectional moment of inertia: D is the outer diameter, d is the inner diameter,

[0069] Yield limit: y is D / 2.σ max is 200MPa

[0070] The outer diameter of the vulcanizing pipe 4 is 100mm, and the wall thickness is 8mm. After calculation, it can be obtained that q=197.2N / mm, so the force of vertical displacement of the most central point of the vulcanizing pipe 4 is 6.59kN.

[0071] Among them, the hydraulic pressure between the first smooth bending area 3131 and the second smooth bending area 3134 is 2.64kN, the hydraulic pressure between the first forming bending area 3132 and the second forming bending area 3135 is 5.31kN, and the hydraulic pressure between the first correction shaping area 3133 and the second correction shaping area 3136 is 6.92kN. In order to avoid the rebound deformation of the vulcanizing pipe 4, the actual displacement amount of this point is 1.05 times the standard displacement amount.

[0072] As shown in Figure 4 The upper support 34 is provided with a plurality of through holes, and the hydraulic oil cylinder 311 of each group of hydraulic die device 31 of the upper support 34 corresponds to the through hole arranged in the upper support 34.

[0073] Specifically, since the upper support 34 is provided with a plurality of through holes, the plurality of sets of hydraulic pressure molding devices 31 of the upper support 34 are respectively correspondingly arranged in the through holes of the upper support 34, so that the plurality of sets of hydraulic pressure molding devices 31 of the upper support 34 are connected as a whole through the hydraulic oil cylinders 311 and the upper support 34, and the upper support 34 and the plurality of sets of hydraulic pressure molding devices 31 on the upper support 34 are simultaneously lifted through the plurality of lifting devices 35, so that the pipe bending mold 313 of the plurality of sets of hydraulic pressure molding devices 31 of the upper support 34 exerts pressure on the vulcanized pipe 4 to realize the bending deformation of the vulcanized pipe 4, effectively enhances the stability and consistency of the bending process of the vulcanized pipe 4, and thus accurately controls the bending deformation precision of the vulcanized pipe 4, and ensures that the bending deformation of the vulcanized pipe 4 meets the production process conditions of the rubber-sheathed cable.

[0074] According to the embodiment of the present application, as shown in Figure 3 and Figure 4 , the one side of the lower support 33 and the one side of the upper support 34 are respectively provided with induction plates 36 corresponding to the plurality of sets of hydraulic pressure molding devices 32, the pipe bending mold 313 is provided with a displacement sensor 314, and the induction plate 36 and the displacement sensor 314 are correspondingly arranged.

[0075] Specifically, since the one side of the lower support 33 and the one side of the upper support 34 are respectively provided with induction plates 36 corresponding to the plurality of sets of hydraulic pressure molding devices 31, the pipe bending mold 313 is provided with a displacement sensor 314, and the induction plate 36 and the displacement sensor 314 are correspondingly arranged, the deformation amount of each point of the vulcanized pipe 4 can be transmitted through the induction plate 36 on the one side of the lower support 33 and the displacement sensor 314 of the pipe bending mold 313 of the plurality of sets of hydraulic pressure molding devices 31 on the lower support 33, and the induction plate 36 on the one side of the upper support 34 and the displacement sensor 314 of the pipe bending mold 313 of the plurality of sets of hydraulic pressure molding devices 31 on the upper support 34, the bending deformation of the vulcanized pipe 4 can be captured in real time, the stability and controllability of the bending deformation process of the vulcanized pipe 4 can be ensured, the processing precision can be improved, and the product quality of the rubber-sheathed cable can be ensured.

[0076] The second aspect of the present application also discloses an operation method of the vulcanized pipe bending device for rubber-sheathed cable extrusion, comprising the following steps:

[0077] S1, starting the heating device 23, heating the temperature of the vulcanized pipe 4 to 175-185 DEG C and keeping warm;

[0078] S2, adjusting the height of the upper support 34 by using the lifting device 35, so that the arc surface of the pipe bending mold 313 of the plurality of sets of hydraulic pressure molding devices 31 on the upper support 34 presses on the upper end of the vulcanized pipe 4;

[0079] S3, when the vulcanization pipe 4 is pressed 1-3 times, the bending of the vulcanization pipe 4 is between the first smooth bending area 3131 and the second smooth bending area 3134; when the vulcanization pipe 4 is pressed 3-5 times, the bending of the vulcanization pipe 4 is between the first forming bending area 3132 and the second forming bending area 3135; when the vulcanization pipe 4 is pressed 6-8 times, the bending of the vulcanization pipe 4 is between the first correction shaping area 3133 and the second correction shaping area 3136;

[0080] S4, the vulcanization pipe 4 is pressed once every 1 hour, the stable pressing state is ensured, and then the pressing is continued; the pressing distance is confirmed according to the bending point position of the vulcanization pipe 4 each time, and the bending pipe pressing die 313 of the plurality of sets of hydraulic pressing die devices 31 of the lower support 33 and the bending pipe pressing die 313 of the plurality of sets of hydraulic pressing die devices 31 of the upper support 34 are synchronously pressed and retracted by the PLC control system according to the feedback of the displacement sensor 314.

[0081] Specifically, by the operation method of the rubber jacketed cable extrusion vulcanization pipe bending device, the vulcanization pipe 4 is gradually heated to 175-185 DEG C and kept warm, so that the vulcanization pipe 4 is processed in a constant temperature state, and the influence of temperature fluctuation on the material performance is avoided; the vulcanization pipe 4 is gradually pressed by the different bending areas of the bending pipe pressing die 313 of the hydraulic pressing die device 31, the vulcanization pipe 4 is slightly deformed by the first smooth bending area 3131 and the second smooth bending area 3134, the vulcanization pipe 4 forms the required bending degree by the first forming bending area 3132 and the second forming bending area 3135, and finally the vulcanization pipe 4 is corrected and shaped by the first correction shaping area 3133 and the second correction shaping area 3136, so that the bending deformation process of the vulcanization pipe 4 is greatly optimized, and the deformation of the vulcanization pipe is uniform in the whole bending deformation process, and the product quality is ensured;

[0082] By the feedback of the displacement sensor 314, the plurality of sets of hydraulic pressing die devices 31 of the upper support 34 and the plurality of sets of hydraulic pressing die devices 31 of the lower support 33 are synchronously pressed and retracted, the stability and consistency of the bending of each point of the vulcanization pipe 4 are ensured, the bending deformation process of the vulcanization pipe 4 can be efficiently completed, and the process requirements of the bending deformation of the vulcanization pipe 4 are met.

[0083] According to the embodiment of the present application, as shown in the figure, Figures 13-14 the rubber jacketed cable extrusion production line, wherein the front end of several sections is a vulcanization bending pipe, and the rear end of several sections is a vulcanization straight pipe; in order to ensure the catenary angle, the bending angle of each section of the vulcanization pipe is different, so that the catenary angle can be smoothly transitioned down, and the catenary angle of the rubber jacketed cable extrusion production line is generally about 16-25 DEG, and the present scheme takes 20 DEG catenary angle as an example.

[0084] The vulcanization pipe 4 adopts an austenitic stainless steel pipe, which has a relatively small deformation amount at 20-200°C, and the deformation amount significantly increases when the temperature rises to 600-1000°C; according to the catenary angle, it is set to 20°, including 5 sections of vulcanization elbow pipes, taking the first section as an example, the vertical displacement of each point relative to the center line is mainly referenced to the catenary angle, and then determined according to the actual production line height.

[0085] The vertical displacement of the first section of the vulcanization pipe h1 point is controlled at 6.3-6.5mm, preferably 6.4mm;

[0086] The vertical displacement of the first section of the vulcanization pipe h2 point is controlled at 7.8-8.0mm, preferably 7.9mm;

[0087] The vertical displacement of the first section of the vulcanization pipe h3 point is controlled at 12.9-13.1mm, preferably 13.0mm;

[0088] The vertical displacement of the first section of the vulcanization pipe h4 point is controlled at 15.6-15.8mm, preferably 15.7mm;

[0089] The vertical displacement of the first section of the vulcanization pipe h5 point is controlled at 23.0-23.2mm, preferably 23.1mm;

[0090] The vertical displacement of the first section of the vulcanization pipe h6 point is controlled at 28.4-28.6mm, preferably 28.5mm;

[0091] The vertical displacement of the first section of the vulcanization pipe h7 point is controlled at 30.5-30.7mm, preferably 30.6mm;

[0092] The vertical displacement of the first section of the vulcanization pipe h8 point is controlled at 33.3-33.5mm, preferably 33.4mm;

[0093] The vertical displacement of the first section of the vulcanization pipe h9 point is controlled at 30.9-31.1mm, preferably 31.0mm;

[0094] The vertical displacement of the first section of the vulcanization pipe h10 point is controlled at 26.6-26.8mm, preferably 26.7mm;

[0095] The vertical displacement of the first section of the vulcanization pipe h11 point is controlled at 19.6-19.8mm, preferably 19.7mm;

[0096] The vertical displacement of the first section of the vulcanization pipe h12 point is controlled at 15.9-16.1mm, preferably 16.0mm;

[0097] The vertical displacement of the first section of the vulcanization pipe h13 point is controlled at 11.5-11.7mm, preferably 11.6mm;

[0098] The vertical displacement of the first section of the vulcanized tube h14 is controlled within 6.1mm-6.3mm, preferably 6.2mm;

[0099] The vertical displacement of the first section of the vulcanized tube h15 is controlled within 4.2mm-4.4mm, preferably 4.3mm;

[0100] The vertical displacement of each point of the first section of the vulcanized tube is shown in Table 1:

[0101] Table 1

[0102] h1 h2 h3 h4 h5 h6 h7 h8 h9 h10 h11 h12 h13 h14 h15 6.4 7.9 13.0 15.7 23.1 28.5 30.6 33.4 31.0 26.7 19.7 16.0 11.6 6.2 4.3

[0103] Taking the center position of the first section of the vulcanized tube 4, i.e. h8, as an example, the vertical displacement here is 33.4mm, and the total length of the vulcanized tube 4 is 6000mm, so the bending degree here is 33.4mm / 3000mm=1.113%.

[0104] The bending degree between the first smooth bending area 3131 and the second smooth bending area 3134 is 20%-30% of the bending degree of the h8 point, i.e. 0.223%-0.334%, the bending degree between the first forming bending area 3132 and the second forming bending area 3135 is 80%-90% of the bending degree of the h8 point, i.e. 0.890%-1.002%, and the bending degree between the first correction shaping area 3133 and the second correction shaping area 3136 is 100%-102% of the bending degree of the h8 point, i.e. 1.113%-1.135%.

[0105] The first smooth bending area 3131 and the second smooth bending area 3134 account for 2 / 10 of the total area, the first forming bending area 3132 and the second forming bending area 3135 account for 7 / 10 of the total area, and the first correction shaping area 3133 and the second correction shaping area 3136 account for 1 / 10 of the total area.

[0106] The above specific embodiments further illustrate the purpose, technical solutions and advantages of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A vulcanized tube bending device for extruding a rubber cable, characterized by, The utility model relates to a vulcanization pipe heating device, including: The heat preservation assembly (1), heating conduction assembly (2), elbow pipe assembly (3), vulcanization pipe (4) and PLC control system; The heat preservation assembly (1) includes the casing (11), and the heating conduction assembly (2) and elbow pipe assembly (3) are arranged in the casing (11); The heating conduction assembly (2) includes first heat pipe (21), second heat pipe (22) and heating device (23); One end of the first heat pipe (21) is connected with one end of the heating device (23), the other end of the first heat pipe (21) is connected with one end of the vulcanization pipe (4), one end of the second heat pipe (22) is connected with the other end of the heating device (23), and the other end of the second heat pipe (22) is connected with the other end of the vulcanization pipe (4); The elbow pipe assembly (3) includes a plurality of sets of hydraulic pressure moulding devices (31), and the plurality of sets of hydraulic pressure moulding devices (31) include elbow pipe moulding (313); The vulcanization pipe (4) is provided with a heating belt (24) between a plurality of sets of adjacent hydraulic pressure moulding devices (31); The elbow pipe assembly (3) further includes a support seat (32), a lower support (33) and an upper support (34), and a plurality of sets of the hydraulic pressure moulding devices (31) are arranged on the lower support (33) and the upper support (34) in a staggered manner; The elbow pipe moulding (313) is provided with an arc surface close to one end of the vulcanization pipe (4), and the elbow pipe moulding (313) is connected with the vulcanization pipe (4) through the arc surface; The arc surface of the elbow pipe moulding (313) at the upper end of the vulcanization pipe (4) is in a middle convex shape along the axial direction of the vulcanization pipe (4) and is sequentially provided with a first smooth bending area (3131), a first forming bending area (3132) and a first correction shaping area (3133) from high to low, and the arc surface of the elbow pipe moulding (313) at the lower end of the vulcanization pipe (4) is in a middle concave shape along the axial direction of the vulcanization pipe (4) and is sequentially provided with a second smooth bending area (3134), a second forming bending area (3135) and a second correction shaping area (3136) from low to high, and the first smooth bending area (3131), the first forming bending area (3132) and the first correction shaping area (3133) are respectively arranged correspondingly to the second smooth bending area (3134), the second forming bending area (3135) and the second correction shaping area (3136).

2. The vulcanized tube bending device for extruding a sheathed cable according to claim 1, characterized by, A plurality of sets of the hydraulic pressure moulding devices (31) each include a hydraulic oil cylinder (311), the hydraulic oil cylinder (311) is rotatably provided with a thrust ball bearing (312) at the bottom, the thrust ball bearing (312) is provided with an elbow pipe moulding (313) at the bottom, the vulcanization pipe (4) is arranged on the elbow pipe mouldings (313) of a plurality of sets of the hydraulic pressure moulding devices (31) of the lower support (33), and a plurality of temperature sensors (41) are arranged on the vulcanization pipe (4).

3. The vulcanized tube bending device for extruding a sheathed cable according to claim 2, characterized by, The elbow assembly (3) further comprises a plurality of groups of lifting devices (35), the lifting device (35) is provided with a transmission screw rod (351), the upper part of the transmission screw rod (351) is provided with a transmission nut (352), one side of the transmission nut (352) is connected with one side of the upper support (34), the lower part of the transmission screw rod (351) is provided with a supporting block (353), one side of the supporting block (353) is connected with one side of the lower support (33).

4. The vulcanized tube bending device for extruding a sheathed cable according to claim 3, characterized by The bottom of the transmission screw rod (351) is provided with a servo motor (354), the upper part of the servo motor (354) is provided with a shaft coupling (355), one side of the servo motor (354) is connected with one side of the supporting seat (32).

5. The vulcanized tube bending device for extruding a sheathed cable according to claim 4, characterized by The upper support (34) is provided with a plurality of through holes, and the hydraulic oil cylinders (311) of the plurality of groups of the hydraulic pressure die devices (31) of the upper support (34) are respectively arranged in the through holes.

6. The vulcanized tube bending device for extruding a sheathed cable according to claim 5, characterized by One side of the lower support (33) and one side of the upper support (34) are respectively provided with an induction plate (36) corresponding to a plurality of groups of the hydraulic pressure die devices (31), and the elbow pressure die (313) is provided with a displacement sensor (314), and the induction plate (36) and the displacement sensor (314) are correspondingly arranged.

7. The method of operating a vulcanized tube bending apparatus for extruding a jacketed cable as defined in claim 6, wherein, The method comprises the following steps: S1, start the heating device (23), heat the temperature of the vulcanization pipe (4) to 175-185 DEG C and keep warm; S2, the height of the upper support (34) is adjusted by the lifting device (35), so that the arc surface of the elbow pressure die (313) of the plurality of groups of the hydraulic pressure die devices (31) on the upper support (34) is pressed on the upper end of the vulcanization pipe (4); S3, when the vulcanization pipe (4) is pressed 1-3 times, the curvature of the vulcanization pipe (4) is between the first smooth bending area (3131) and the second smooth bending area (3134); when pressed 3-5 times, the curvature of the vulcanization pipe (4) is between the first forming bending area (3132) and the second forming bending area (3135); when pressed 6-8 times, the curvature of the vulcanization pipe (4) is between the first correction shaping area (3133) and the second correction shaping area (3136); S4, the vulcanization pipe (4) is pressed once every 1 hour, and the stable pressing state is stabilized, and then the pressing is continued; the pressing distance is confirmed according to the bending point position of the vulcanization pipe (4) each time, and the displacement sensor (314) is fed back to the PLC control system, so that the elbow pressure die (313) of the plurality of groups of the hydraulic pressure die devices (31) of the lower support (33) and the elbow pressure die (313) of the plurality of groups of the hydraulic pressure die devices (31) of the upper support (34) are synchronously pressed and retracted.

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