Vulcanization pipe bending device for rubber sleeve cable extrusion and operation method thereof

Abstract

The invention discloses a vulcanization pipe bending device for rubber sleeve cable extrusion and an operation method of the vulcanization pipe bending device. The vulcanization pipe bending device comprises a heat preservation assembly, a heating conduction assembly, a pipe bending assembly, a vulcanization pipe and a PLC control system. The device can effectively improve the bending uniformity and consistency of each point position of the vulcanized pipe, realizes the accurate bending and shaping effects of the vulcanized pipe, and can measure and calculate the vertical displacement of a plurality of point positions relative to the center line according to the bending angle of the vulcanized pipe, thereby meeting the process requirement of the bending deformation quantity of the vulcanized pipe; compared with a bending mode of a traditional rubber sleeve cable vulcanized pipe, the method adopts a mode of combining hot-state bending and cold-state bending, hot-state processing is firstly performed for preliminary forming, the hardness is reduced by utilizing the plasticity of the rubber sleeve cable vulcanized pipe, then cold-state processing is performed for accurate forming, and therefore the problems of cracks and the like of materials are avoided; by means of the operation method of the device, it is guaranteed that deformation of the vulcanized pipe is uniform in the whole bending deformation process, product quality is guaranteed, and the technological requirement for the bending deformation quantity of the vulcanized pipe is met.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber sheathed cable production, in particular to a vulcanized tube bending device for rubber sheathed cable extrusion and an operating method thereof. Background Art

[0002] Rubber sheathed cable mainly refers to rubber sheathed cable, which is mainly used to transmit or distribute power signals in the power, petrochemical, metallurgical and other industries. The vulcanization process is one of the important processes of rubber sheathed cable, and its main function is to enhance the pressure resistance and wear resistance of the rubber sheath, thereby ensuring the service life and reliability of the rubber sheathed cable.

[0003] Among the related technologies, the production and manufacturing technology of rubber-sheathed cable products currently still relies on traditional continuous vulcanization production equipment, that is, the cables are continuously produced in a closed continuous vulcanization pipeline. Since the production environment of the rubber-sheathed cable is in high-temperature and high-pressure water vapor in a closed vulcanization tube, and corrosive chemicals are produced during the vulcanization process, causing corrosion of the vulcanization tube. After a long period of accumulation, holes will appear, thus affecting the vulcanization quality of the cable. Therefore, the vulcanization tube needs to be replaced regularly. At present, most vulcanization tubes are made of stainless steel tubes, and need to be bent and shaped into a certain size. The angle of each section of the vulcanization tube is inconsistent, and it is impossible to ensure that the bending angle of the vulcanization tube meets the process requirements. Multiple rework and correction are required, resulting in a long processing cycle and low efficiency. At the same time, the price of purchased bent pipes is expensive, the delivery cycle is long, and the bending angle also cannot meet the process requirements. Summary of the invention

[0004] The object of the present invention is to provide a vulcanized tube bending device for rubber sheathed cable extrusion and an operating method thereof, so as to solve at least one aspect of the problems and defects raised in the above-mentioned background technology.

[0005] Specifically, the first aspect of the present invention discloses a vulcanized tube bending device for rubber sheathed cable extrusion, comprising:

[0006] Insulation components, heating conduction components, bending components, vulcanized pipes and PLC control systems;

[0007] The heat preservation component comprises a shell, and the heating conduction component and the elbow component are arranged in the shell;

[0008] The heating conduction assembly comprises a first heat transfer tube, a second heat transfer tube and a heating device;

[0009] One end of the first heat transfer tube is connected to one end of the heating device, the other end of the first heat transfer tube is connected to one end of the vulcanization tube, one end of the second heat transfer tube is connected to the other end of the heating device, and the other end of the second heat transfer tube is connected to the other end of the vulcanization tube;

[0010] The pipe bending assembly includes several groups of hydraulic die pressing devices;

[0011] Heating belts are respectively arranged on the vulcanizing tube and between a plurality of adjacent groups of the hydraulic die pressing devices.

[0012] The vulcanized tube bending device for rubber sheathed cable extrusion according to the present invention has at least the following beneficial effects:

[0013] The vulcanized tube bending device for rubber-sheathed cable extrusion of the present invention uses a heating device to transfer the heat of the first heat transfer tube and the second heat transfer tube to the vulcanized tube, and forms a circulating heating channel to ensure uniform heating; and uses a heating belt to heat the outside of the vulcanized tube to enhance the heating effect of the outside of the vulcanized tube; at the same time, the heating conduction component, the bending tube component and the vulcanized tube are insulated by the insulation component to further ensure the constant temperature condition of the vulcanized tube after heating; and uses a plurality of groups of hydraulic die pressing devices to pressurize the hot vulcanized tube to cause it to bend and deform; the uniformity and consistency of bending at each point of the vulcanized tube can be effectively improved, and the precise bending and shaping effect of the vulcanized tube can be achieved; and according to the bending angle of the vulcanized tube, the vertical displacement of multiple points 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, α is the linear expansion coefficient, β is the volume expansion coefficient, and ΔT is the temperature change), so as to meet the process requirements of the bending deformation of the vulcanized tube;

[0014] The present invention uses several groups of hydraulic die pressing devices of the bending tube assembly. After the vulcanized tube is heated, it is cold-pressed by several groups of hydraulic die pressing devices, so that the vulcanized tube is pressed multiple times by several groups of hydraulic die pressing devices, and gradually produces bending deformation; compared with the bending method of the traditional rubber-sheathed cable vulcanized tube, the present invention adopts a combination of hot bending and cold bending, which effectively reduces the adverse effects of residual stress on the material while ensuring high precision, refines the grain structure of the material, improves the comprehensive mechanical properties of the material, and makes the shape of the material more in line with expectations. First, hot processing is performed for preliminary shaping, and its plasticity is used to reduce the hardness, and then cold processing is performed for precise shaping, thereby effectively avoiding problems such as cracks in the material.

[0015] As a further solution of the present invention: the bending pipe assembly also includes a support seat, a lower bracket and an upper bracket, and a plurality of groups of the hydraulic die pressing devices are mirror-imaged and staggeredly arranged on the lower bracket and the upper bracket.

[0016] Since the pipe bending assembly also includes a support seat, a lower bracket and an upper bracket, several groups of hydraulic die pressing devices are mirrored and staggered on the lower bracket and the upper bracket, so that the support seat, the lower bracket and the several groups of hydraulic die pressing devices on the lower bracket can effectively support the pressure generated by the upper bracket and the several groups of hydraulic die pressing devices on the upper bracket 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 accuracy and quality of the product.

[0017] As a further solution of the present invention: several groups of the hydraulic molding devices all include a hydraulic cylinder, a thrust ball bearing is rotatably arranged at the bottom of the hydraulic cylinder, a bending pipe mold is arranged at the bottom of the thrust ball bearing, the vulcanized pipe is arranged on the bending pipe mold of several groups of the hydraulic molding devices on the lower bracket, and several temperature sensors are arranged on the vulcanized pipe.

[0018] As a further solution of the present invention: the bending pipe assembly also includes several groups of lifting devices, the lifting devices are provided with a transmission screw, a transmission nut is provided on the upper part of the transmission screw, one side of the transmission nut is connected to one side of the upper bracket, and a support block is provided at the lower part of the transmission screw, one side of the support block is connected to one side of the lower bracket.

[0019] As a further solution of the present invention: a servo motor is arranged at the bottom of the transmission screw rod, a coupling is arranged at the top of the servo motor, and one side of the servo motor is connected to one side of the support seat.

[0020] Since several groups of hydraulic die pressing devices all include a hydraulic cylinder, a thrust ball bearing is rotatably arranged at the bottom of the hydraulic cylinder, a bending die is arranged at the bottom of the thrust ball bearing, a vulcanized tube is arranged on the bending die of several groups of hydraulic die pressing devices on the lower bracket, and several temperature sensors are arranged on the vulcanized tube; the bending tube assembly also includes several groups of lifting devices, the lifting device is provided with a transmission screw, a transmission nut is arranged on the upper part of the transmission screw, one side of the transmission nut is connected to one side of the upper bracket, a support block is arranged at the lower part of the transmission screw, one side of the support block is connected to one side of the lower bracket; a servo motor is arranged at the bottom of the transmission screw, a coupling is arranged on the upper part of the servo motor, and one side of the servo motor is connected to one side of the support seat; the angle of the bending die can be adjusted by the thrust ball bearing of the hydraulic die pressing device, so that the bending The tube pressing die can be adjusted according to the end face of the vulcanized tube to realize the axial positioning of the vulcanized tube, so that the bending tube pressing die is adapted to the upper and lower end faces of the vulcanized tube; and the upper bracket and the several groups of hydraulic pressing die devices on the upper bracket are driven to move downward at the same time through several groups of lifting devices, so that the bending tube pressing die of the several groups of hydraulic pressing die devices on the upper bracket is pressed on the upper end of the vulcanized tube; pressure is gradually applied to the upper end of the vulcanized tube through the several groups of hydraulic pressing die devices on the upper bracket; and because the several groups of hydraulic pressing die devices on the lower bracket are mirrored and staggered with the several groups of hydraulic pressing die devices on the upper bracket, the several groups of hydraulic pressing die devices on the lower bracket generate a reaction force under the pressure applied by the several groups of hydraulic pressing die devices on the upper bracket, so that the vulcanized tube is gradually deformed, so as to realize a vulcanized tube whose bending deformation meets the process requirements.

[0021] The vulcanized tube bending device for rubber sheathed cable extrusion of the present invention effectively improves the precise control of the bending deformation of the vulcanized tube, can adapt to the process requirements of different vulcanized tube bending deformations, effectively enhances the adaptability and ease of operation, and compared with the traditional vulcanized tube bending deformation method, optimizes the control of the deformation amount, and effectively improves the product quality of the rubber sheathed cable.

[0022] As a further solution of the present invention: the pipe bending die is provided with an arc surface at one end close to the vulcanizing tube, and the pipe bending die is connected to the vulcanizing tube via the arc surface.

[0023] As a further solution of the present invention: the arc surface of the bending die at the upper end of the vulcanizer tube is provided with a first smooth bending area, a first forming bending area and a first correction and shaping area in sequence from high to low along the axial direction of the vulcanizer tube, and the arc surface of the bending die at the lower end of the vulcanizer tube is provided with a second smooth bending area, a second forming bending area and a second correction and shaping area in sequence from low to high along the axial direction of the vulcanizer tube, and the first smooth bending area, the first forming bending area and the first correction and shaping area are respectively arranged corresponding to the second smooth bending area, the second forming bending area and the second correction and shaping area.

[0024] Since the bending die is provided with an arc surface at one end close to the vulcanizing tube, the bending die is connected to the vulcanizing tube through the arc surface; the arc surface of the bending die at the upper end of the vulcanizing tube is provided with a first smooth bending area, a first forming bending area and a first correction and shaping area in sequence from high to low along the axial direction of the vulcanizing tube, and the arc surface of the bending die at the lower end of the vulcanizing tube is provided with a second smooth bending area, a second forming bending area and a second correction and shaping area in sequence from low to high along the axial direction of the vulcanizing tube, and the first smooth bending area, the first forming bending area and the first correction and shaping area are respectively provided corresponding to 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 areas of bending deformation of the vulcanizing tube, and are pressed by a hydraulic die pressing device 1 ~3 times, the vulcanized tube is slightly deformed; the first forming bending zone and the second forming bending zone are the second area of ​​bending deformation of the vulcanized tube. When the hydraulic die pressing device is pressed 3 to 5 times, the bending angle of the vulcanized tube meets the process requirements; the first correction and finalization zone and the second correction and finalization zone are the third area of ​​bending deformation of the vulcanized tube. When the hydraulic die pressing device is pressed 6 to 8 times, the bending angle of the vulcanized tube is corrected and finalized to prevent the bending angle of the vulcanized tube from rebounding and deforming; through three different areas, each area corresponds to a different number of pressing times and deformation requirements, so that the bending deformation of the vulcanized tube is gradually carried out, and finally reaches a shape and angle that meets the process requirements, ensuring the bending deformation accuracy and efficiency of the vulcanized tube and the quality of the rubber-sheathed cable products.

[0025] As a further solution of the present invention: the upper bracket is provided with a plurality of through holes, and the hydraulic cylinders of the plurality of groups of the hydraulic die pressing devices of the upper bracket are respectively and correspondingly arranged in the through holes of the upper bracket.

[0026] Since the upper bracket is provided with a plurality of through holes, the hydraulic cylinders of the plurality of hydraulic die pressing devices of the upper bracket are respectively and correspondingly arranged in the through holes of the upper bracket, so that the plurality of hydraulic die pressing devices of the upper bracket are connected to the upper bracket as a whole through the hydraulic cylinders, and the upper bracket and the plurality of hydraulic die pressing devices on the upper bracket are lifted and lowered simultaneously through a plurality of lifting devices, so that the bending dies of the plurality of hydraulic die pressing devices of the upper bracket exert pressure on the vulcanized pipe to realize the bending deformation of the vulcanized pipe, which effectively enhances the stability and consistency of the bending process of the vulcanized pipe, thereby accurately controlling the bending deformation accuracy of the vulcanized pipe, and ensuring that the bending deformation of the vulcanized pipe meets the production process conditions of the rubber-sheathed cable.

[0027] As a further solution of the present invention: one side of the lower bracket and one side of the upper bracket are respectively provided with sensing plates corresponding to several groups of the hydraulic die devices, and a displacement sensor is provided on the bending tube die, and the sensing plates are provided corresponding to the displacement sensors.

[0028] Since one side of the lower bracket and one side of the upper bracket are respectively provided with sensing plates corresponding to several groups of hydraulic die devices, and the pipe bending die is provided with displacement sensors, the sensing plates and the displacement sensors are provided correspondingly, through the sensing plate on one side of the lower bracket and the displacement sensors of several groups of hydraulic die devices on the lower bracket, as well as the sensing plate on one side of the upper bracket and the displacement sensors of several groups of hydraulic die devices on the upper bracket, the deformation amount of each point of the vulcanized pipe can be transmitted, the bending deformation of the vulcanized pipe can be captured in real time, the stability and controllability of the bending deformation process of the vulcanized pipe can be ensured, the processing accuracy can be improved, and the product quality of the rubber-sheathed cable can be guaranteed.

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

[0030] S1, start the heating device, heat the vulcanizing tube to 175°C-185°C and keep it warm;

[0031] S2, using a lifting device to adjust the height of the upper bracket, so that the arc surface of the bending dies of the plurality of groups of the hydraulic pressing die devices on the upper bracket is pressed against the upper end of the vulcanizing tube;

[0032] S3, when the vulcanizing tube is pressed 1 to 3 times, the curvature of the vulcanizing tube is between the first smooth bending area and the second smooth bending area; when pressed 3 to 5 times, the curvature of the vulcanizing tube is between the first forming bending area and the second forming bending area; when pressed 6 to 8 times, the curvature of the vulcanizing tube is between the first correction and finalizing area and the second correction and finalizing area;

[0033] S4, the vulcanized tube is compressed once every 1 hour to stabilize the compression state, and then continues to be compressed; each compression distance is confirmed according to the bending point of the vulcanized tube, and the PLC control system makes the bending dies of the several groups of hydraulic compression mold devices of the lower bracket and the bending dies of the several groups of hydraulic compression mold devices of the upper bracket to achieve synchronous compression and retraction according to the feedback of the displacement sensor.

[0034] According to the operation method of the vulcanized tube bending device for rubber-sheathed cable extrusion, the vulcanized tube is gradually heated to 175°C-185°C and kept warm, so as to ensure that the vulcanized tube is processed under a constant temperature state, thereby avoiding the influence of temperature fluctuation on material properties. The vulcanized tube is gradually pressed by using different bending areas of the bending die of the hydraulic die pressing device, and the vulcanized tube is slightly deformed through the first smooth bending area and the second smooth bending area, and then the vulcanized tube is formed into a desired curvature through the first forming bending area and the second forming bending area, and finally the vulcanized tube is corrected and formed through the first correction and finalization area and the second correction and finalization area, thereby greatly optimizing the bending deformation process of the vulcanized tube, and each pressing interval is 1 hour, so as to ensure that the vulcanized tube is uniformly deformed during the entire bending deformation process, thereby ensuring product quality.

[0035] Through the PLC control system, according to the feedback of the displacement sensor, several groups of hydraulic pressing mold devices of the upper bracket and several groups of hydraulic pressing mold devices of the lower bracket are synchronously pressed and retracted to ensure the stability and consistency of the bending at each point of the vulcanized tube. The bending deformation process of the vulcanized tube can be completed efficiently to meet the process requirements of the bending deformation amount of the vulcanized tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0037] Figure 1 This is a schematic diagram of the overall structure of a vulcanized tube bending device for rubber sheathed cable extrusion;

[0038] Figure 2 It is a partial structural schematic diagram of a vulcanized tube bending device for rubber sheathed cable extrusion;

[0039] Figure 3 This is a schematic diagram of the structure of a bending tube assembly of a vulcanized tube bending device for rubber sheathed cable extrusion;

[0040] Figure 4 for Figure 2 A local enlarged view of point A;

[0041] Figure 5 It is a schematic diagram of the exploded structure of a hydraulic die pressing device of a vulcanized tube bending device for rubber sheathed cable extrusion;

[0042] Figure 6 for Figure 2 A partial enlarged view of point B;

[0043] Figure 7 It is a schematic diagram of the bending tube pressing die structure of an upper bracket hydraulic pressing die device of a vulcanized tube bending device for rubber-sheathed cable extrusion;

[0044] Figure 8 for Figure 7 A side structural cross-sectional view of

[0045] Fig. 9 It is a schematic diagram of the bending tube pressing die structure of a lower bracket hydraulic pressing die device of a vulcanized tube bending device for rubber-sheathed cable extrusion;

[0046] Fig.10 for Fig. 9 A side structural cross-sectional view of

[0047] Fig.11 It is a schematic diagram of the structure of the vulcanized tube before bending deformation;

[0048] Fig.12 It is a schematic diagram of the structure of the vulcanized tube after bending deformation;

[0049] Fig.13 This is the principle diagram of the bending deformation at each point of the vulcanized tube;

[0050] Fig.14 This is a schematic diagram of the overall structure of the rubber sheathed cable continuous sulfur extrusion production line.

[0051] Reference numerals:

[0052] 1. Insulation assembly; 11. Shell; 2. Heating conduction assembly; 21. First heat transfer tube; 22. Second heat transfer tube; 23. Heating device; 24. Heating belt; 3. Bending assembly; 31. Hydraulic die pressing device; 311. Hydraulic cylinder; 312. Thrust ball bearing; 313. Bending die; 3131. First smooth bending area; 3132. First forming bending area; 3133. First correction and shaping area; 3134. Second smooth bending area; 3135. Second forming bending area; 3136. Second correction and shaping area; 314. Displacement sensor; 32. Support seat; 33. Lower bracket; 34. Upper bracket; 35. Lifting device; 351. Transmission screw rod; 352. Transmission nut; 353. Support block; 354. Servo motor; 355. Coupling; 36. Induction plate; 4. Vulcanizing tube; 41. Temperature sensor. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the technical solution of the present invention is further specifically described below by way of examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0054] In addition, in the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments may be implemented without these specific details. In other cases, known structures and devices are embodied in a schematic manner to simplify the accompanying drawings.

[0055] like Figure 1-14The embodiment of the present invention is shown as a vulcanized tube bending device for rubber sheathed cable extrusion, comprising: a heat preservation component 1, a heating conduction component 2, a bending component 3, a vulcanized tube 4 and a PLC control system; the heat preservation component 1 comprises a shell 11, and the heating conduction component 2 and the bending component 3 are arranged in the shell 11; the heating conduction component 2 comprises a first heat transfer tube 21, a second heat transfer tube 22 and a heating device 23; one end of the first heat transfer tube 21 is connected to one end of the heating device 23, the other end of the first heat transfer tube 21 is connected to one end of the vulcanized tube 4, one end of the second heat transfer tube 22 is connected to the other end of the heating device 23, and the other end of the second heat transfer tube 22 is connected to the other end of the vulcanized tube 4; the bending component 3 comprises a plurality of groups of hydraulic die devices 31; heating belts 24 are respectively arranged on the vulcanized tube 4 and between a plurality of adjacent groups of hydraulic die devices 31.

[0056] Specifically, the vulcanized tube bending device for rubber sheathed cable extrusion of the present invention uses a heating device 23 to transfer the heat of the first heat transfer tube 21 and the second heat transfer tube 22 to the vulcanized tube 4, and forms a circulating heating channel to ensure uniform heating; and uses a heating belt 24 to heat the outside of the vulcanized tube 4 to enhance the heating effect of the outside of the vulcanized tube 4; at the same time, the heating conduction component 2, the bending tube component 3 and the vulcanized tube 4 are insulated by the insulation component 1 to further ensure the constant temperature condition of the vulcanized tube 4 after heating; and uses a plurality of groups of hydraulic die pressing devices 31 to heat the vulcanized tube 4. The hot vulcanizing tube 4 is pressurized to bend and deform. The uniformity and consistency of the bending of each point of the vulcanizing tube 4 can be effectively improved, and the precise bending and shaping effect of the vulcanizing tube 4 can be achieved. According to the bending angle of the vulcanizing tube 4, the vertical displacement of multiple points 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, α is the linear expansion coefficient, β is the volume expansion coefficient, and ΔT is the temperature change), so as to meet the process requirements of the bending deformation of the vulcanizing tube.

[0057] The present invention uses several groups of hydraulic die pressing devices 31 of the bending tube assembly 3, and after the vulcanized tube 4 is heated, it is cold pressed by several groups of hydraulic die pressing devices 31, so that the vulcanized tube 4 is pressed multiple times by several groups of hydraulic die pressing devices 31, and gradually produces bending deformation; compared with the bending method of the traditional rubber-sheathed cable vulcanized tube, the present invention adopts a combination of hot bending and cold bending, which effectively reduces the adverse effects of residual stress on the material while ensuring high precision, refines the grain structure of the material, improves the comprehensive mechanical properties of the material, and makes the shape of the material more in line with expectations. First, hot processing is performed for preliminary shaping, and its plasticity is used to reduce the hardness, and then cold processing is performed for precise shaping, thereby effectively avoiding problems such as cracks in the material.

[0058] like Figure 2 and Figure 3As shown, the bending pipe assembly 3 also includes a support seat 32, a lower bracket 33 and an upper bracket 34, and a plurality of groups of hydraulic die pressing devices 31 are mirror-imaged and staggeredly arranged on the lower bracket 33 and the upper bracket 34.

[0059] Specifically, since the bending tube assembly 3 also includes a support seat 32, a lower bracket 33 and an upper bracket 34, several groups of hydraulic die devices 31 are mirrored and staggered on the lower bracket 33 and the upper bracket 34, so that the support seat 32, the lower bracket 33 and the several groups of hydraulic die devices 31 on the lower bracket can effectively support the upper bracket 34 and the several groups of hydraulic die devices 31 on the upper bracket. The pressure generated during operation ensures the stability of the vulcanized tube 4 during the bending process, and can more accurately control the bending deformation of the vulcanized tube, thereby improving the processing accuracy and quality of the product.

[0060] like Figure 3-6 As shown, several groups of hydraulic die pressing devices 31 all include a hydraulic cylinder 311, a thrust ball bearing 312 is rotatably arranged at the bottom of the hydraulic cylinder 311, a bending die 313 is arranged at the bottom of the thrust ball bearing 312, the vulcanized tube 4 is arranged on the bending die 313 of several groups of hydraulic die pressing devices 31 of the lower bracket 33, and several temperature sensors 41 are arranged on the vulcanized tube 4; the bending tube assembly 3 also includes several groups of lifting devices 35, the lifting devices 35 are provided with a transmission screw 351, a transmission nut 352 is arranged on the upper part of the transmission screw 351, one side of the transmission nut 352 is connected to one side of the upper bracket 34, a support block 353 is arranged at the lower part of the transmission screw 351, and one side of the support block 353 is connected to one side of the lower bracket 33; a servo motor 354 is arranged at the bottom of the transmission screw 351, a coupling 355 is arranged on the upper part of the servo motor 354, and one side of the servo motor 354 is connected to one side of the support seat 32.

[0061] Specifically, since the plurality of hydraulic die pressing devices 31 each include a hydraulic cylinder 311, a thrust ball bearing 312 is rotatably provided at the bottom of the hydraulic cylinder 311, a bending die 313 is provided at the bottom of the thrust ball bearing 312, the vulcanized tube 4 is provided on the bending die 313 of the plurality of hydraulic die pressing devices 31 of the lower bracket 33, and a plurality of temperature sensors 41 are provided on the vulcanized tube 4; the bending tube assembly 3 also includes a plurality of lifting devices 35, and the lifting devices 35 are provided with a transmission screw 351, A transmission screw 351 is provided with a transmission nut 352 on the upper part, one side of the transmission nut 352 is connected to one side of the upper bracket 34, a support block 353 is provided on the lower part of the transmission screw 351, one side of the support block 353 is connected to one side of the lower bracket 33; a servo motor 354 is provided at the bottom of the transmission screw 351, a coupling 355 is provided on the upper part of the servo motor 354, one side of the servo motor 354 is connected to one side of the support seat 32; a thrust ball shaft of the hydraulic die pressing device 31 is provided The bearing 312 can adjust the angle of the bending die 313, so that the bending die 313 can be adjusted according to the end face of the vulcanizing tube 4, realize the axial positioning of the vulcanizing tube 4, and make the bending die 313 match the upper and lower end faces of the vulcanizing tube 4; and drive the upper bracket 34 and the several groups of hydraulic die devices 31 on the upper bracket to move downward at the same time through the several groups of lifting devices 35, so that the bending die 313 of the several groups of hydraulic die devices 31 of the upper bracket 34 is pressed on the upper end of the vulcanizing tube 4; gradually apply pressure to the upper end of the vulcanizing tube 4 through the several groups of hydraulic die devices 31 of the upper bracket 34; and because the several groups of hydraulic die devices 31 of the lower bracket 33 and the several groups of hydraulic die devices 31 of the upper bracket 34 are mirrored and staggered, the several groups of hydraulic die devices 31 of the lower bracket 33 generate reaction force under the pressure applied by the several groups of hydraulic die devices 31 of the upper bracket 34, so that the vulcanizing tube 4 is gradually deformed, and the vulcanizing tube 4 with bending deformation meeting the process requirements is realized.

[0062] The vulcanized tube bending device for rubber-sheathed cable extrusion of the present invention effectively improves the precise control of the bending deformation of the vulcanized tube 4, can adapt to the process requirements of different bending deformations of the vulcanized tube 4, effectively enhances the adaptability and ease of operation, and compared with the traditional vulcanized tube bending deformation method, optimizes the control of the deformation amount, and effectively improves the product quality of the rubber-sheathed cable.

[0063] like Figure 7-10As shown, the bending die 313 is provided with an arc surface at one end close to the vulcanizing tube 4, and the bending die 313 is connected to the vulcanizing tube 4 through the arc surface; the arc surface of the bending die 313 at the upper end of the vulcanizing tube 4 is provided with a first smooth bending area 3131, a first forming bending area 3132 and a first correction and shaping area 3133 in sequence from high to low along the axial direction of the vulcanizing tube 4, and the arc surface of the bending die 313 at the lower end of the vulcanizing tube 4 is provided with a second smooth bending area 3134, a second forming bending area 3135 and a second correction and shaping area 3136 in sequence from low to high along the axial direction of the vulcanizing tube 4, and the first smooth bending area 3131, the first forming bending area 3132 and the first correction and shaping area 3133 are respectively provided corresponding to the second smooth bending area 3134, the second forming bending area 3135 and the second correction and shaping area 3136.

[0064] Specifically, since the bending die 313 is provided with an arc surface at one end close to the vulcanizing tube 4, the bending die 313 is connected to the vulcanizing tube 4 through the arc surface; the arc surface of the bending die 313 at the upper end of the vulcanizing tube 4 is provided with a first smooth bending area 3131, a first forming bending area 3132 and a first correction and shaping area 3133 in sequence from high to low along the axial direction of the vulcanizing tube 4, and the arc surface of the bending die 313 at the lower end of the vulcanizing tube 4 is provided with a second smooth bending area 3134, a second forming bending area 3135 and a second correction and shaping area 3136 in sequence from low to high along the axial direction of the vulcanizing tube 4, the first smooth bending area 3131, the first forming bending area 3132 and the first correction and shaping area 3133 are respectively provided corresponding to the second smooth bending area 3134, the second forming bending area 3135 and the second correction and shaping area 3136; the first smooth bending area 3131 and the second smooth bending area 3134 are vulcanizing tubes. The first area of ​​the bending deformation of the vulcanized tube 4 is slightly deformed when it is pressed 1 to 3 times by the hydraulic die pressing device 31; the first forming bending area 3132 and the second forming bending area 3135 are the second area of ​​the bending deformation of the vulcanized tube 4. When it is pressed 3 to 5 times by the hydraulic die pressing device 31, the bending angle of the vulcanized tube 4 meets the process requirements; the first correction and finalization area 3133 and the second correction and finalization area 3136 are the third area of ​​the bending deformation of the vulcanized tube 4. When it is pressed 6 to 8 times by the hydraulic die pressing device 31, the bending angle of the vulcanized tube 4 is corrected and finalized to prevent the bending angle of the vulcanized tube 4 from rebounding and deforming; through three different areas, each area corresponds to a different number of pressing times and deformation requirements, so that the bending deformation of the vulcanized tube 4 is gradually carried out, and finally reaches a shape and angle that meets the process requirements, ensuring the bending deformation accuracy and efficiency of the vulcanized tube 4 and the quality of the rubber-sheathed cable products.

[0065] The hydraulic cylinder 311 directly drives the bending die 313, so the deformation force driven by the hydraulic pressure of the hydraulic cylinder 311 is also different. The hydraulic pressure is in a gradually increasing state 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 and molding area 3133, the second correction and molding area 3136.

[0066] Calculate the force and deformation conditions using the hydraulic pressure at the four center points of the vulcanized tube:

[0067] Bending load: q is the load,

[0068] Moment of inertia of area: D is the outer diameter, d is the inner diameter,

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

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

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

[0072] like Figure 4 As shown, the upper bracket 34 is provided with a plurality of through holes, and the hydraulic cylinders 311 of the plurality of groups of hydraulic die pressing devices 31 of the upper bracket 34 are respectively and correspondingly arranged in the through holes of the upper bracket 34 .

[0073] Specifically, since the upper bracket 34 is provided with a plurality of through holes, the hydraulic cylinders 311 of the plurality of hydraulic die devices 31 of the upper bracket 34 are respectively correspondingly arranged in the through holes of the upper bracket 34, so that the plurality of hydraulic die devices 31 of the upper bracket 34 are connected to the upper bracket 34 as a whole through the hydraulic cylinders 311, and the upper bracket 34 and the plurality of hydraulic die devices 31 on the upper bracket 34 are simultaneously lifted and lowered through the plurality of lifting devices 35, so that the bending dies 313 of the plurality of hydraulic die devices 31 of the upper bracket 34 apply pressure to the vulcanized tube 4 to realize the bending deformation of the vulcanized tube 4, which effectively enhances the stability and consistency of the bending process of the vulcanized tube 4, thereby accurately controlling the bending deformation accuracy of the vulcanized tube 4, and ensuring that the bending deformation of the vulcanized tube 4 meets the production process conditions of the rubber-sheathed cable.

[0074] According to an embodiment of the present invention, Figure 3 and Figure 4 As shown, one side of the lower bracket 33 and one side of the upper bracket 34 are respectively provided with sensing plates 36 corresponding to a plurality of groups of hydraulic die pressing devices 32 , and a displacement sensor 314 is provided on the bending tube die 313 , and the sensing plates 36 and the displacement sensors 314 are provided correspondingly.

[0075] Specifically, since one side of the lower bracket 33 and one side of the upper bracket 34 are respectively provided with a sensing plate 36 corresponding to several groups of hydraulic die devices 31, and a displacement sensor 314 is provided on the bending die 313, the sensing plate 36 and the displacement sensor 314 are correspondingly arranged, through the sensing plate 36 on one side of the lower bracket 33 and the displacement sensors 314 of several groups of hydraulic die devices 31 bending dies 313 on the lower bracket 33, and the sensing plate 36 on one side of the upper bracket 34 and the displacement sensors 314 of several groups of hydraulic die devices 31 bending dies 313 on the upper bracket 34, the deformation amount of each point of the vulcanized tube 4 can be transmitted, the bending deformation of the vulcanized tube 4 can be captured in real time, the stability and controllability of the bending deformation process of the vulcanized tube 4 can be ensured, the processing accuracy can be improved, and the product quality of the rubber-sheathed cable can be guaranteed.

[0076] The second aspect of the present invention also discloses an operating method of a vulcanized tube bending device for rubber-sheathed cable extrusion, comprising the following steps:

[0077] S1, start the heating device 23, heat the vulcanizing tube 4 to 175°C-185°C and keep it warm;

[0078] S2, using the lifting device 35 to adjust the height of the upper bracket 34, so that the arc surface of the bending die 313 of the plurality of hydraulic die pressing devices 31 on the upper bracket 34 is pressed against the upper end of the vulcanizing tube 4;

[0079] S3, when the vulcanizing tube 4 is pressed 1 to 3 times, the curvature of the vulcanizing tube 4 is between the first smooth bending area 3131 and the second smooth bending area 3134; when it is pressed 3 to 5 times, the curvature of the vulcanizing tube 4 is between the first forming bending area 3132 and the second forming bending area 3135; when it is pressed 6 to 8 times, the curvature of the vulcanizing tube 4 is between the first correction and finalizing area 3133 and the second correction and finalizing area 3136;

[0080] S4, the vulcanized tube 4 is compressed once every 1 hour to stabilize the compression state, and then continue to compress; each compression distance is confirmed according to the bending point of the vulcanized tube 4, and the PLC control system, based on the feedback of the displacement sensor 314, makes the bending tube dies 313 of the several groups of hydraulic pressing devices 31 of the lower bracket 33 and the bending tube dies 313 of the several groups of hydraulic pressing devices 31 of the upper bracket 34 achieve synchronous compression and retraction.

[0081] Specifically, through the operation method of the vulcanized tube bending device for rubber-sheathed cable extrusion, the vulcanized tube 4 is gradually heated to 175°C-185°C and kept warm, so as to ensure that the vulcanized tube 4 is processed under a constant temperature state, thereby avoiding the influence of temperature fluctuation on material properties, and gradually compacting the vulcanized tube 4 using different bending areas of the bending tube die 313 of the hydraulic die pressing device 31, and slightly deforming the vulcanized tube 4 through the first smooth bending area 3131 and the second smooth bending area 3134, and then forming the vulcanized tube 4 with the required curvature through the first forming bending area 3132 and the second forming bending area 3135, and finally correcting and finalizing the vulcanized tube 4 through the first correction and finalizing area 3133 and the second correction and finalizing area 3136, thereby greatly optimizing the bending deformation process of the vulcanized tube 4, and each compaction interval is 1 hour, thereby ensuring that the vulcanized tube is uniformly deformed during the entire bending deformation process, thereby ensuring product quality;

[0082] Through the PLC control system, according to the feedback of the displacement sensor 314, the multiple groups of hydraulic pressing mold devices 31 of the upper bracket 34 and the multiple groups of hydraulic pressing mold devices 31 of the lower bracket 33 are synchronously pressed and retracted, ensuring the stability and consistency of the bending of each point of the vulcanizing tube 4, and can efficiently complete the bending deformation process of the vulcanizing tube 4 to meet the process requirements of the bending deformation amount of the vulcanizing tube 4.

[0083] According to an embodiment of the present invention, Figure 13-14 As shown, the rubber sheathed cable continuous sulfur extrusion production line, in which several sections at the front end are vulcanized curved pipes, and several sections at the rear end are vulcanized straight pipes; in order to ensure the catenary angle, the vulcanized pipes at the front end must have a certain bending angle to ensure a smooth transition of the catenary angle, so the bending angle of each section of the vulcanized pipe is different; the overhang angle of the rubber sheathed cable extrusion production line is generally around 16 to 25°, and this scheme is based on an overhang angle of 20° as an example.

[0084] The vulcanized pipe 4 is made of austenitic stainless steel pipe, which has a relatively small deformation at 20°C-200°C, but increases significantly when the temperature rises to 600°C-1000°C. It is set at 20° according to the catenary angle, including 5 sections of vulcanized bent pipes. Taking the first section as an example, the vertical displacement of each point relative to the center line is mostly determined based on the catenary angle as a reference and then determined according to the actual production line height.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[0100] The specific vertical displacement of each point of the first section of the vulcanized tube, in mm, 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, that is, h8, as an example, the vertical displacement here is 33.4 mm, and the total length of the vulcanized tube 4 is 6000 mm, so the curvature here is 33.4 mm / 3000 mm=1.113%.

[0104] The curvature between the first smooth bending zone 3131 and the second smooth bending zone 3134 is 20% to 30% of the curvature of the h8 point, that is, 0.223% to 0.334%. The curvature between the first forming bending zone 3132 and the second forming bending zone 3135 is 80% to 90% of the curvature of the h8 point, that is, 0.890% to 1.002%. The curvature between the first correction molding zone 3133 and the second correction molding zone 3136 is 100% to 102% of the curvature of the h8 point, that is, 1.113% to 1.135%.

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

[0106] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vulcanized tube bending device for rubber sheathed cable extrusion, characterized in that: include: A heat preservation component (1), a heating conduction component (2), a bending pipe component (3), a vulcanizing pipe (4) and a PLC control system; The heat preservation component (1) comprises a shell (11), and the heating conduction component (2) and the elbow component (3) are arranged in the shell (11); The heating conduction component (2) comprises a first heat transfer tube (21), a second heat transfer tube (22) and a heating device (23); One end of the first heat transfer tube (21) is connected to one end of the heating device (23), the other end of the first heat transfer tube (21) is connected to one end of the vulcanizing tube (4), one end of the second heat transfer tube (22) is connected to the other end of the heating device (23), and the other end of the second heat transfer tube (22) is connected to the other end of the vulcanizing tube (4); The pipe bending assembly (3) comprises a plurality of groups of hydraulic die pressing devices (31); Heating belts (24) are respectively arranged on the vulcanizing tube (4) and between a plurality of adjacent groups of hydraulic die pressing devices (31).

2. The vulcanized tube bending device for rubber-sheathed cable extrusion according to claim 1, characterized in that: The bending pipe assembly (3) also includes a support seat (32), a lower bracket (33) and an upper bracket (34), and a plurality of groups of the hydraulic die pressing devices (31) are mirror-imaged and staggeredly arranged on the lower bracket (33) and the upper bracket (34).

3. The vulcanized tube bending device for rubber-sheathed cable extrusion according to claim 2, characterized in that: Several groups of the hydraulic die pressing devices (31) all comprise a hydraulic cylinder (311), a thrust ball bearing (312) is rotatably arranged at the bottom of the hydraulic cylinder (311), a bending tube die (313) is arranged at the bottom of the thrust ball bearing (312), the vulcanized tube (4) is arranged on the bending tube die (313) of several groups of the hydraulic die pressing devices (31) on the lower bracket (33), and several temperature sensors (41) are arranged on the vulcanized tube (4).

4. The vulcanized tube bending device for rubber-sheathed cable extrusion according to claim 3, characterized in that: The bending pipe assembly (3) further comprises a plurality of lifting devices (35), wherein the lifting devices (35) are provided with a transmission screw (351), a transmission nut (352) is provided on the upper portion of the transmission screw (351), one side of the transmission nut (352) is connected to one side of the upper bracket (34), and a support block (353) is provided on the lower portion of the transmission screw (351), one side of the support block (353) is connected to one side of the lower bracket (33).

5. The vulcanized tube bending device for rubber-sheathed cable extrusion according to claim 4, characterized in that: A servo motor (354) is disposed at the bottom of the transmission screw rod (351), a coupling (355) is disposed at the top of the servo motor (354), and one side of the servo motor (354) is connected to one side of the support seat (32).

6. The vulcanized tube bending device for rubber-sheathed cable extrusion according to claim 5, characterized in that: An arc-shaped surface is provided at one end of the pipe bending die (313) close to the vulcanizing tube (4), and the pipe bending die (313) is connected to the vulcanizing tube (4) via the arc-shaped surface.

7. The vulcanized tube bending device for rubber-sheathed cable extrusion according to claim 6, characterized in that: The arc surface of the bending die (313) at the upper end of the vulcanizing tube (4) is provided with a first smooth bending area (3131), a first forming bending area (3132) and a first correction and shaping area (3133) in sequence from high to low along the axial direction of the vulcanizing tube (4); the arc surface of the bending die (313) at the lower end of the vulcanizing tube (4) is provided with a second smooth bending area (3134), a second forming bending area (3135) and a second correction and shaping area (3136) in sequence from low to high along the axial direction of the vulcanizing tube (4); the first smooth bending area (3131), the first forming bending area (3132) and the first correction and shaping area (3133) are respectively provided corresponding to the second smooth bending area (3134), the second forming bending area (3135) and the second correction and shaping area (3136).

8. The vulcanized tube bending device for rubber-sheathed cable extrusion according to claim 7, characterized in that: The upper bracket (34) is provided with a plurality of through holes, and a plurality of groups of hydraulic cylinders (311) of the hydraulic die pressing devices (31) of the upper bracket (34) are respectively and correspondingly arranged in the through holes of the upper bracket (34).

9. The vulcanized tube bending device for rubber-sheathed cable extrusion according to claim 8, characterized in that: One side of the lower bracket (33) and one side of the upper bracket (34) are respectively provided with sensing plates (36) corresponding to a plurality of groups of the hydraulic die pressing devices (31), a displacement sensor (314) is provided on the bent pipe die (313), and the sensing plates (36) and the displacement sensors (314) are provided correspondingly.

10. The method for operating the vulcanized tube bending device for rubber-sheathed cable extrusion as claimed in claim 9, characterized in that: The steps include: S1, starting the heating device (23), heating the vulcanizing tube (4) to a temperature of 175° C.-185° C. and keeping the temperature constant; S2, using a lifting device (35) to adjust the height of the upper support (34) so ​​that the arc-shaped surfaces of the bending dies (313) of the plurality of groups of the hydraulic die pressing devices (31) on the upper support (34) are pressed against the upper end of the vulcanizing tube (4); S3, when the vulcanizing tube (4) is pressed 1 to 3 times, the curvature of the vulcanizing tube (4) is between the first smooth bending area (3131) and the second smooth bending area (3134); when it is pressed 3 to 5 times, the curvature of the vulcanizing tube (4) is between the first forming bending area (3132) and the second forming bending area (3135); when it is pressed 6 to 8 times, the curvature of the vulcanizing tube (4) is between the first correction and shaping area (3133) and the second correction and shaping area (3136); S4, the vulcanized tube (4) is compressed once every 1 hour to stabilize the compression state, and then continue to compress; each compression distance is determined according to the bending point of the vulcanized tube (4), and the PLC control system causes the bending tube dies (313) of the several groups of hydraulic compression devices (31) of the lower bracket (33) and the bending tube dies (313) of the several groups of hydraulic compression devices (31) of the upper bracket (34) to achieve synchronous compression and retraction according to the feedback of the displacement sensor (314).

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