Bending mechanism for bending vulcanized pipe

Abstract

The utility model discloses a bending mechanism for bending a vulcanization pipe. The bending mechanism comprises a supporting seat, a lower bracket, an upper bracket, a lifting device and the vulcanization pipe, the lower support is arranged on the supporting base, and the upper support is connected with the supporting base and the lower support through a lifting device. The hydraulic pressing die devices comprise a plurality of lower pressing dies arranged on the lower support and a plurality of upper pressing dies arranged on the upper support; the lower pressing die and the upper pressing die are staggered and are arranged in a mirror image manner; and the vulcanizing pipe is arranged on the lower pressing die. According to the bending mechanism for bending the vulcanized pipe, the vulcanized pipe subjected to heat treatment in advance is pressurized by utilizing a plurality of groups of hydraulic die pressing devices, so that the vulcanized pipe is bent and deformed; the bending uniformity and consistency of all point positions of the vulcanized pipe are effectively improved, the precise bending and shaping effects of the vulcanized pipe are achieved, hot-state machining is conducted for primary forming, the hardness is reduced through plasticity of the vulcanized pipe, then cold-state machining is conducted for precise forming, and therefore the problems of cracks and the like of materials are effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a rubber -covered cable production technical field, concretely relates to a bending mechanism for vulcanization pipe bending. BACKGROUND

[0002] The rubber -covered cable mainly refers to rubber -covered cable, and its use mainly is in power, petrifaction, metallurgy etc. industry transmission or distribution power signal. And vulcanization process is one of important processes of rubber -covered cable, and its main function is to make rubber sheath enhance pressure resistance and wear resistance, thereby guaranteeing the service life and reliability of rubber -covered cable.

[0003] In the related art, the production and manufacturing technology of rubber -covered cable products 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 -covered 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 may be formed after a long time accumulation, thereby affecting the vulcanization quality of the cable. Therefore, the vulcanization pipe needs to be replaced regularly. At present, the vulcanization pipe is mostly made of stainless steel pipe and needs to be bent and shaped into a certain size. The angle of each section of the vulcanization pipe is inconsistent, and the bending angle of the vulcanization pipe cannot meet the process requirements, so it 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. UTILITARIAN CONTENT

[0004] The utility model aims at providing a bending mechanism for vulcanization pipe bending to solve at least one aspect of the problems and defects in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A bending mechanism for vulcanization pipe bending comprises:

[0007] Supporting seat, lower support, upper support, lifting device and vulcanization pipe.

[0008] The lower support is arranged on the supporting seat, and the upper support is connected with the supporting seat and the lower support by the lifting device.

[0009] It further comprises a plurality of groups of hydraulic pressing die devices, and the plurality of groups of hydraulic pressing die devices comprise a plurality of lower pressing dies arranged on the lower support and a plurality of upper pressing dies arranged on the upper support.

[0010] The lower pressing dies and the upper pressing dies are arranged in a staggered and mirror image manner.

[0011] The vulcanization pipe is arranged on the lower pressing dies.

[0012] The bending mechanism for bending a vulcanized pipe according to the present scheme has at least the following technical effects:

[0013] The bending mechanism for bending a vulcanized pipe utilizes several sets of hydraulic pressing devices to press the pre-heat-treated vulcanized pipe to make it bend and deform, can effectively improve the uniformity and consistency of bending of each point of the vulcanized pipe, realize accurate bending and shaping 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, thereby quickly meeting the process requirements of the bending deformation of the vulcanized pipe and improving the processing efficiency.

[0014] The vulcanized pipe is pre-heat-treated and then cold-pressed by the several sets of hydraulic pressing devices of the bending mechanism, which can effectively reduce the adverse effects of residual stress on the material while ensuring high precision, refine the grain structure of the material, and improve the comprehensive mechanical properties of the material, so that the shape of the material is more in line with the expectation. The hardness is reduced by utilizing the plasticity of the material in the preliminary forming process, and then the material is accurately formed in the cold forming process, thereby effectively avoiding problems such as cracks in the material.

[0015] As a further scheme of the present utility model, the upper pressing die comprises a hydraulic oil cylinder, the bottom of the hydraulic oil cylinder is rotatably provided with a thrust ball bearing, the bottom of the thrust ball bearing is provided with a first elbow pipe pressing die, and the top of the lower pressing die is provided with a second elbow pipe pressing die.

[0016] Since the upper pressing die comprises a hydraulic oil cylinder, the bottom of the hydraulic oil cylinder is rotatably provided with a thrust ball bearing, the bottom of the thrust ball bearing is provided with a first elbow pipe pressing die, and the top of the lower pressing die is provided with a second elbow pipe pressing die, the angle of the first elbow pipe pressing die can be adjusted by the thrust ball bearing, the angle of the first elbow pipe pressing die can be adjusted according to the end face of the vulcanized pipe on the second elbow pipe pressing die, the axial positioning of the vulcanized pipe is realized, so that the upper and lower end faces of the vulcanized pipe are respectively matched with the first elbow pipe pressing die and the second elbow pipe pressing die, the offset or misalignment of the vulcanized pipe during the bending process is avoided, the precision and consistency of the bending are improved, the shape and angle of the vulcanized pipe after bending can meet the design requirements, and the demand of high-precision application is met.

[0017] As a further scheme of the present utility model, the arc surfaces of the first elbow pipe pressing die and the second elbow pipe pressing die are respectively arranged at one end close to the vulcanized pipe.

[0018] As a further scheme of the present utility model, the arc surface of the first elbow pipe pressing die 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 vulcanized pipe, and the arc surface of the second elbow pipe pressing die 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 vulcanized pipe.

[0019] As a further scheme of the utility model: the first smooth bending area, the first forming bending area and the first correction shaping area are respectively arranged correspondingly with the second smooth bending area, the second forming bending area and the second correction shaping area.

[0020] Due to the arc surfaces of the first elbow die and the second elbow die are arranged at the end of the vulcanized pipe, the arc surface of the first elbow die is sequentially provided with the first smooth bending area, the first forming bending area and the first correction shaping area from high to low along the axial direction of the vulcanized pipe, the arc surface of the second elbow die is sequentially provided with the second smooth bending area, the second forming bending area and the second correction shaping area from low to high along the axial direction of the vulcanized pipe, the first smooth bending area, the first forming bending area and the first correction shaping area are respectively arranged correspondingly with the second smooth bending area, the second forming bending area and the second correction shaping area, the first smooth bending area and the second smooth bending area are the first area of the bending deformation of the vulcanized pipe, the bending angle of the vulcanized pipe meets the process requirements when the hydraulic die device is pressed 3-5 times, the first correction shaping area and the second correction shaping area are the third area of the bending deformation of the vulcanized pipe, the bending angle of the vulcanized pipe is corrected and shaped when the hydraulic die device is pressed 6-8 times, preventing the rebound deformation of the bending angle of the vulcanized pipe, through the three different areas, each area corresponds to different pressing times and deformation requirements, the bending deformation of the vulcanized pipe is gradually carried out, finally the shape and angle meeting the process requirements are achieved, the bending deformation precision and efficiency of the vulcanized pipe are ensured, and the quality of the rubber jacketed cable product is ensured.

[0021] As a further scheme of the utility model: the lifting device is provided with a transmission screw rod, a transmission screw nut is arranged at the upper part of the transmission screw rod, one side of the transmission screw nut is connected with one side of the upper support, a supporting block is arranged at the lower part of the transmission screw rod, and one side of the supporting block is connected with one side of the lower support.

[0022] As a further scheme of the utility model: the transmission screw rod is provided with a servo motor at the bottom, 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 supporting seat.

[0023] The lifting device is provided with a transmission screw rod, the upper part of the transmission screw rod is provided with a transmission screw nut, one side of the transmission screw nut is connected with one side of the upper support, the lower part of the transmission screw rod is provided with a supporting block, one side of the supporting 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, one side of the servo motor is connected with one side of the supporting seat; the upper support and the upper pressing die are driven by the lifting device to move downward at the same time, so that the first elbow pipe pressing die of the upper pressing die is pressed on the upper end of the vulcanization pipe, and gradually applies pressure to the vulcanization pipe, at the same time, the lower pressing die on the lower support and the upper pressing die on the upper support are staggered and mirror-imaged, so that the lower pressing die generates a reaction force under the pressure applied by the upper pressing die, so that the vulcanization pipe gradually deforms to realize the bending deformation of the vulcanization pipe meeting the process requirements.

[0024] As a further scheme of the utility model: the side of the upper support corresponding to the first elbow pipe pressing die and the side of the lower support corresponding to the second elbow pipe pressing die are respectively provided with an induction plate, the first elbow pipe pressing die and the second elbow pipe pressing die are respectively provided with a displacement sensor, and the induction plate and the displacement sensor are correspondingly arranged.

[0025] Since the side of the upper support corresponding to the first elbow pipe pressing die and the side of the lower support corresponding to the second elbow pipe pressing die are respectively provided with an induction plate, the first elbow pipe pressing die and the second elbow pipe pressing die are respectively provided with a displacement sensor, and the induction plate and the displacement sensor are correspondingly arranged, the deformation amount of each point of the vulcanization pipe can be transmitted through the induction plate on one side of the upper support and the displacement sensor on the first elbow pipe pressing die and the induction plate on one side of the lower support and the displacement sensor on the second elbow pipe pressing die, the bending deformation of the vulcanization pipe can be captured in real time, the stability and controllability of the bending deformation process of the vulcanization pipe can be ensured, the processing precision can be improved, and the product quality of the rubber-sheathed cable can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order for those skilled in the art to understand, the utility model will be further described below with reference to the drawings.

[0027] Figure 1 It is a bending mechanism working state structure schematic view for vulcanization pipe bending;

[0028] Figure 2 It is a bending mechanism non-working state structure schematic view for vulcanization pipe bending;

[0029] Figure 3 It is an upper pressing die explosion structure schematic view for bending mechanism for vulcanization pipe bending;

[0030] Figure 4 It is a first elbow pipe pressing die structure schematic view of the upper pressing die for bending mechanism for vulcanization pipe bending;

[0031] Figure 5 It is Figure 4A side structural cross-sectional view;

[0032] Figure 6 This is a schematic diagram of the structure of the second bending die of the lower die of a bending mechanism for vulcanized tube bending;

[0033] Figure 7 for Figure 6 A side structural cross-sectional view;

[0034] Figure 8 for Figure 2 A local enlarged view of point A;

[0035] Figure 9 for Figure 2 A partial enlarged view of point B;

[0036] Figure 10 This is the principle diagram of the bending deformation at each point of the vulcanized tube;

[0037] Figure 11 This is a schematic diagram of the overall structure of the rubber-sheathed cable continuous sulfur extrusion production line.

[0038] Reference numerals:

[0039] 1. Support seat; 2. Lower bracket; 3. Upper bracket; 4. Lifting device; 41. Drive screw; 42. Drive nut; 43. Support block; 44. Servo motor; 45. Coupling; 5. Vulcanizing tube; 61. Lower die; 611. Second bend die; 6111. Second smooth bending area; 6112. Second forming and bending area; 6113. Second correction and shaping area; 62. Upper die; 621. Hydraulic cylinder; 622. Thrust ball bearing; 623. First bend die; 6231. First smooth bending area; 6232. First forming and bending area; 6233. First correction and shaping area; 7. Induction plate; 8. Displacement sensor. DETAILED DESCRIPTION

[0040] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0041] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0042] In the description of the utility model, if several meanings are one or more, the meaning of multiple is two or more, greater than, less than, exceed and the like are understood as not including the number, above, below, within and the like are understood as including the number.If there is a description to the first, the second is only used for distinguishing technical features for the purpose, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0043] In the description of the utility model, unless otherwise defined, the words such as setting, installation, connection should be understood in a broad sense, and the person skilled in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0044] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples.It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model, that is, the described examples are only a part of the examples of the utility model, not all examples.The components of the utility model embodiments described and shown in the drawings herein can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model.Based on the embodiments of the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0046] As Figures 1-11 The utility model discloses a kind of bending mechanisms for bending vulcanization pipe, comprising: support seat 1, lower support 2, upper support 3, lifting device 4 and vulcanization pipe 5;Lower support 2 is arranged on support seat 1, and upper support 3 is connected with support seat 1 and lower support 2 respectively by lifting device 4;It further includes several groups of hydraulic pressure moulding device, and several groups of hydraulic pressure moulding device include several lower moulds 61 arranged in lower support 2, and several upper moulds 62 arranged in upper support 3;Lower mould 61 and upper mould 62 are staggered and mirror image arrangement;Vulcanization pipe 5 is arranged on lower mould 61.

[0047] Specifically, the bending mechanism for bending the vulcanized pipe uses several sets of hydraulic pressing devices to press the pre-heat-treated vulcanized pipe 5 to produce bending deformation; it can effectively improve the uniformity and consistency of bending at each point of the vulcanized pipe 5, realize precise bending and shaping of the vulcanized pipe 5, and according to the bending angle of the vulcanized pipe 5, the vertical displacement of multiple points relative to the center line can be calculated, thereby quickly meeting the process requirements of the bending deformation of the vulcanized pipe 5, and improving the processing efficiency.

[0048] The vulcanized pipe 5 is pre-heat-treated and then cold-pressed by the several sets of hydraulic pressing devices of the bending mechanism, which can effectively reduce the adverse effects of residual stress on the material, refine the grain structure of the material, and improve the comprehensive mechanical properties of the material, so that the shape of the material is more in line with the expectation. The material is first heat-processed to preliminarily form, and then cold-processed to accurately form, thereby effectively avoiding cracks and other problems in the material.

[0049] As shown in Figure 3 The upper pressing die 62 includes a hydraulic oil cylinder 621, the bottom of the hydraulic oil cylinder 621 is rotatably provided with a thrust ball bearing 622, the bottom of the thrust ball bearing 622 is provided with a first elbow pipe pressing die 623, and the top of the lower pressing die 61 is provided with a second elbow pipe pressing die 611.

[0050] Specifically, since the upper pressing die 62 includes a hydraulic oil cylinder 621, the bottom of the hydraulic oil cylinder 621 is rotatably provided with a thrust ball bearing 622, the bottom of the thrust ball bearing 622 is provided with a first elbow pipe pressing die 623, and the top of the lower pressing die 61 is provided with a second elbow pipe pressing die 611; the upper pressing die 62 can adjust the angle of the first elbow pipe pressing die 623 through the thrust ball bearing 622, so that the first elbow pipe pressing die 623 can adjust the angle according to the end face of the vulcanized pipe 5 on the second elbow pipe pressing die 611, realize the axial positioning of the vulcanized pipe 5, so that the upper and lower end faces of the vulcanized pipe 5 are respectively matched with the first elbow pipe pressing die 623 and the second elbow pipe pressing die 611, avoid the vulcanized pipe 5 from being offset or misaligned during the bending process, improve the bending precision and consistency, and make the shape and angle of the bent vulcanized pipe 5 meet the design requirements and meet the needs of high-precision applications.

[0051] As shown in Figures 4-7As shown, the first elbow die 623 and the second elbow die 611 are respectively provided with arc surfaces near one end of the vulcanized tube 5; the arc surface of the first elbow die 623 is sequentially provided with a first smooth bending area 6231, a first forming bending area 6232 and a first correction shaping area 6233 from high to low along the axial direction of the vulcanized tube 5, and the arc surface of the second elbow die 611 is sequentially provided with a second smooth bending area 6111, a second forming bending area 6112 and a second correction shaping area 6113 from low to high along the axial direction of the vulcanized tube 5; the first smooth bending area 6231, the first forming bending area 6232 and the first correction shaping area 6233 are respectively correspondingly arranged with the second smooth bending area 6111, the second forming bending area 6112 and the second correction shaping area 6113.

[0052] Specifically, since the first elbow die 623 and the second elbow die 611 are respectively provided with arc surfaces near one end of the vulcanized tube 5; the arc surface of the first elbow die 623 is sequentially provided with a first smooth bending area 6231, a first forming bending area 6232 and a first correction shaping area 6233 from high to low along the axial direction of the vulcanized tube 5, and the arc surface of the second elbow die 611 is sequentially provided with a second smooth bending area 6111, a second forming bending area 6112 and a second correction shaping area 6113 from low to high along the axial direction of the vulcanized tube 5; the first smooth bending area 6231, the first forming bending area 6232 and the first correction shaping area 6233 are respectively correspondingly arranged with the second smooth bending area 6111, the second forming bending area 6112 and the second correction shaping area 6113; the first smooth bending area 6231 and the second smooth bending area 6111 are the first area of bending deformation of the vulcanized tube 5, and the vulcanized tube 5 is slightly deformed when being pressed 1-3 times by the hydraulic die device; the first forming bending area 6232 and the second forming bending area 6112 are the second area of bending deformation of the vulcanized tube 5, and the bending angle of the vulcanized tube 5 meets the process requirements when being pressed 3-5 times by the hydraulic die device; the first correction shaping area 6233 and the second correction shaping area 6113 are the third area of bending deformation of the vulcanized tube 5, and the bending angle of the vulcanized tube 5 is corrected and shaped when being pressed 6-8 times by the hydraulic die device, so as to prevent the bending angle of the vulcanized tube 5 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 tube 5 is gradually performed, and finally the shape and angle meeting the process requirements are achieved, the bending deformation precision and efficiency of the vulcanized tube 5 are ensured, and the quality of the rubber jacketed cable product is ensured.

[0053] The hydraulic cylinder 621 directly drives the second elbow die 611, so the hydraulic pressure of the hydraulic cylinder 621 drives the deformation force to be different, and the hydraulic pressure from the first smooth bending area 6231, the second smooth bending area 6111 to the first forming bending area 6232, the second forming bending area 6112 to the first correction shaping area 6233, the second correction shaping area 6113 is in a gradually increasing state.

[0054] The force and deformation condition driven by the center point of the vulcanizing pipe 5 is calculated by the hydraulic pressure alone:

[0055] Bending load: q is the load,

[0056] Sectional moment of inertia: D is the outer diameter, d is the inner diameter,

[0057] Yield limit: y is D / 2.σ max is 200MPa

[0058] The outer diameter of the vulcanizing pipe 5 is 100mm, and the wall thickness is 8mm thick. 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 5 is 6.59kN.

[0059] The hydraulic pressure between the first smooth bending area 6231 and the second smooth bending area 6111 is 2.64kN, the hydraulic pressure between the first forming bending area 6232 and the second forming bending area 6112 is 5.31kN, and the hydraulic pressure between the first correction shaping area 6233 and the second correction shaping area 6113 is 6.92kN. In order to avoid the rebound deformation amount of the vulcanizing pipe 5, the actual displacement amount of this point is 1.05 times the standard displacement amount.

[0060] As shown in Figure 8 The lifting device 4 is provided with a transmission screw rod 41, the upper part of the transmission screw rod 41 is provided with a transmission nut 42, one side of the transmission nut 42 is connected with one side of the upper support 3, the lower part of the transmission screw rod 41 is provided with a supporting block 43, one side of the supporting block 43 is connected with one side of the lower support 2; the bottom of the transmission screw rod 41 is provided with a servo motor 44, the upper part of the servo motor 44 is provided with a shaft coupling 45, one side of the servo motor 44 is connected with one side of the supporting seat 1.

[0061] Specifically, since the lifting device 4 is provided with the transmission screw rod 41, the transmission screw rod 41 is provided with the transmission nut 42 at the upper portion, one side of the transmission nut 42 is connected with one side of the upper support 3, the transmission screw rod 41 is provided with the supporting block 43 at the lower portion, one side of the supporting block 43 is connected with one side of the lower support 2; the transmission screw rod 41 is provided with the servo motor 44 at the bottom, the servo motor 44 is provided with the coupling 45 at the upper portion, one side of the servo motor 44 is connected with one side of the supporting base 1; the upper support 3 and the upper pressing die 62 are driven by the lifting device 4 to move downward at the same time, so that the first elbow pipe pressing die 623 of the upper pressing die 62 is pressed on the upper end of the vulcanized pipe 5, and gradually applies pressure to the vulcanized pipe 5, at the same time, since the lower pressing die 61 on the lower support 2 and the upper pressing die 62 on the upper support 3 are staggered and mirror-imaged, the lower pressing die 61 generates a reaction force under the pressure applied by the upper pressing die 62, so that the vulcanized pipe 5 gradually deforms to realize the bending deformation of the vulcanized pipe meeting the process requirements.

[0062] According to the embodiment of the utility model, as shown in Figure 9 As shown in the figure, one side of the upper support 3 corresponds to the first elbow pipe pressing die 623 and one side of the lower support 2 corresponds to the second elbow pipe pressing die 611, and the first elbow pipe pressing die 623 and the second elbow pipe pressing die 611 are respectively provided with the inductive plate 7, and the first elbow pipe pressing die 623 and the second elbow pipe pressing die 611 are respectively provided with the displacement sensor 8, and the inductive plate 7 and the displacement sensor 8 are correspondingly arranged.

[0063] Specifically, since one side of the upper support 3 corresponds to the first elbow pipe pressing die 623 and one side of the lower support 2 corresponds to the second elbow pipe pressing die 611, and the first elbow pipe pressing die 623 and the second elbow pipe pressing die 611 are respectively provided with the inductive plate 7, and the first elbow pipe pressing die 623 and the second elbow pipe pressing die 611 are respectively provided with the displacement sensor 8, and the inductive plate 7 and the displacement sensor 8 are correspondingly arranged; through the inductive plate 7 on one side of the upper support 3 and the displacement sensor 8 on the first elbow pipe pressing die 623, and the inductive plate 7 on one side of the lower support 2 and the displacement sensor 8 on the second elbow pipe pressing die 611, the deformation amount of each point of the vulcanized pipe 5 can be transmitted, the bending deformation of the vulcanized pipe 5 can be captured in real time, the stability and controllability of the bending deformation process of the vulcanized pipe 5 can be ensured, the processing precision can be improved, and the product quality of the rubber jacketed cable can be ensured.

[0064] During use, the vulcanized tube 5 is placed on the arc surface of the second bend die 611 of the lower die 61, the vulcanized tube 5 is preheated and kept warm, and the height of the upper bracket 3 is adjusted by the lifting device 4 so that the arc surface of the first bend die 623 of the upper die 62 is pressed against the upper end of the vulcanized tube 5; the vulcanized tube 5 is pressed for 1 hour each time, the pressing state is stabilized, and then the pressing is continued; when the vulcanized tube 5 is pressed 1 to 3 times, the curvature of the vulcanized tube 5 is between the first smooth bending area 6231 and the second smooth bending area 6111; when the vulcanized tube 5 is pressed 3 to 5 times, the curvature of the vulcanized tube 5 is between the first forming bending area 6232 and the second forming bending area 6112; when the vulcanized tube 5 is pressed 6 to 8 times, the curvature of the vulcanized tube 5 is between the first correction and shaping area 6233 and the second correction and shaping area 6113, thereby completing the bending deformation process of the vulcanized tube 5.

[0065] In addition, it should be noted that Figures 10-11 As shown in the figure, the rubber-sheathed cable continuous sulfur extrusion production line has several sections at the front end that are vulcanized curved pipes, and several sections at the rear end that 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 degrees. This scheme is based on an overhang angle of 20 degrees as an example.

[0066] The vulcanized pipe 5 is made of austenitic stainless steel pipe, which has a relatively small deformation at 20℃-200℃, but increases significantly when the temperature rises to 600℃-1000℃. It is set at 20° according to the catenary angle and includes 5 sections of vulcanized bends. Taking the first section as an example, the vertical displacement of each point relative to the center line is mostly based on the catenary angle and then determined according to the actual production line height.

[0067] The vertical displacement of each point on the first section of the vulcanized tube, in mm, is shown in Table 1:

[0068] Table 1

[0069] 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

[0070] Taking the center position of the first section of the vulcanized tube 5, that is, h8, as an example, the vertical displacement here is 33.4 mm, and the total length of the vulcanized tube 5 is 6000 mm, so the curvature here is 33.4 mm / 3000 mm=1.113%.

[0071] The bending degree between the first smooth bending area 6231 and the second smooth bending area 6111 is 20% to 30% of the bending degree of the h8 point, that is, 0.223% to 0.334%, the bending degree between the first forming bending area 6232 and the second forming bending area 6112 is 80% to 90% of the bending degree of the h8 point, that is, 0.890% to 1.002%, and the bending degree between the first correction shaping area 6233 and the second correction shaping area 6113 is 100% to 102% of the bending degree of the h8 point, that is, 1.113% to 1.135%.

[0072] The first smooth bending area 6231 and the second smooth bending area 6111 account for 2 / 10 of the total area, the first forming bending area 6232 and the second forming bending area 6112 account for 7 / 10 of the total area, and the first correction shaping area 6233 and the second correction shaping area 6113 account for 1 / 10 of the total area.

[0073] The above is only an example and description of the structure of the utility model, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the present claims, which shall belong to the protection scope of the utility model.

Claims

1. A bending mechanism for vulcanized tube bending, characterized in that: include: Support base (1), lower bracket (2), upper bracket (3), lifting device (4) and vulcanizing tube (5); The lower bracket (2) is arranged on the support base (1), and the upper bracket (3) is respectively connected to the support base (1) and the lower bracket (2) via a lifting device (4); It also includes a plurality of groups of hydraulic die devices, wherein the plurality of groups of hydraulic die devices include a plurality of lower dies (61) arranged on the lower support (2) and a plurality of upper dies (62) arranged on the upper support (3); The lower pressing die (61) and the upper pressing die (62) are staggered and mirror-imaged; The vulcanizing tube (5) is arranged on the lower die (61).

2. The bending mechanism for bending a vulcanized tube according to claim 1, characterized in that: The upper die (62) comprises a hydraulic cylinder (621), a thrust ball bearing (622) is rotatably provided at the bottom of the hydraulic cylinder (621), a first bend die (623) is provided at the bottom of the thrust ball bearing (622), and a second bend die (611) is provided at the top of the lower die (61).

3. The bending mechanism for bending a vulcanized tube according to claim 2, characterized in that: The first bend pipe pressing die (623) and the second bend pipe pressing die (611) are respectively provided with an arc-shaped surface at one end close to the vulcanizing tube (5).

4. The bending mechanism for bending a vulcanized tube according to claim 3, wherein: The arcuate surface of the first bend tube die (623) is provided with a first smooth bending area (6231), a first forming bending area (6232) and a first correction and shaping area (6233) in sequence from high to low along the axial direction of the vulcanizing tube (5); the arcuate surface of the second bend tube die (611) is provided with a second smooth bending area (6111), a second forming bending area (6112) and a second correction and shaping area (6113) in sequence from low to high along the axial direction of the vulcanizing tube (5).

5. The bending mechanism for bending a vulcanized tube according to claim 4, characterized in that: The first smooth bending area (6231), the first forming bending area (6232) and the first correction and shaping area (6233) are respectively arranged to correspond to the second smooth bending area (6111), the second forming bending area (6112) and the second correction and shaping area (6113).

6. The bending mechanism for bending a vulcanized tube according to claim 1, wherein: The lifting device (4) is provided with a transmission screw (41), a transmission nut (42) is provided on the upper portion of the transmission screw (41), one side of the transmission nut (42) is connected to one side of the upper bracket (3), and a support block (43) is provided on the lower portion of the transmission screw (41), one side of the support block (43) is connected to one side of the lower bracket (2).

7. The bending mechanism for bending a vulcanized tube according to claim 6, wherein: A servo motor (44) is provided at the bottom of the transmission screw rod (41), a coupling (45) is provided at the top of the servo motor (44), and one side of the servo motor (44) is connected to one side of the support seat (1).

8. The bending mechanism for bending a vulcanized tube according to claim 7, characterized in that: A sensing plate (7) is provided on one side of the upper bracket (3) corresponding to the first bend pipe pressing die (623) and a sensing plate (7) is provided on one side of the lower bracket (2) corresponding to the second bend pipe pressing die (611). A displacement sensor (8) is provided on each of the first bend pipe pressing die (623) and the second bend pipe pressing die (611). The sensing plate (7) and the displacement sensor (8) are provided in correspondence with each other.

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