阅读说明：本技术 管线缩口压接机、管线压接方法及压接管 (Pipeline necking crimping machine, pipeline crimping method and crimping pipe ) 是由 马洪峰 王志伟 朱元成 刁学煜 郑炜亮 刘恩赐 隋合轼 郑薇 马力 徐中凯 赵旺 于 2021-09-16 设计创作，主要内容包括：本发明提供了一种管线缩口压接机、管线压接方法及压接管,涉及压接设备的技术领域,该管线缩口压接机包括扣压主机；扣压主机包括主机体和对向开合模组；对向开合模组包括定模具和动模具；定模具和动模具均包括插槽瓣模和多块分体瓣模,插槽瓣模设于定模具与动模具相对的侧面,两侧的插槽瓣模相互配合能够形成组合式分体瓣模；分体瓣模和组合式分体瓣模同时向圆弧圆心靠拢,形成用于夹设管线的内圆面。该管线压接方法利用前述的管线缩口压接机。该压接管利用前述的管线缩口压接机或管线压接方法得到。通过该管线缩口压接机,解决了现有压接方式的压接不牢固,影响机械性能的技术问题,达到了压接牢固,提高机械性能的技术效果。(The invention provides a pipeline necking crimping machine, a pipeline crimping method and a crimping pipe, and relates to the technical field of crimping equipment, wherein the pipeline necking crimping machine comprises a buckling host; the buckling and pressing host comprises a host body and opposite opening and closing modules; the opposite opening and closing module comprises a fixed die and a movable die; the fixed mould and the movable mould comprise slot petals and a plurality of split petals, the slot petals are arranged on the opposite side surfaces of the fixed mould and the movable mould, and the slot petals on the two sides are matched with each other to form a combined split petal; the split petals and the combined split petals simultaneously draw close to the circle center of the circular arc to form an inner circular surface for clamping the pipeline. The pipeline crimping method utilizes the pipeline necking crimper. The crimping pipe is obtained by using the pipeline necking crimping machine or the pipeline crimping method. Through this pipeline throat press-connection machine, the crimping insecure of having solved current crimping mode influences mechanical properties's technical problem, has reached the crimping firmly, improves mechanical properties's technological effect.)

1. A line crimp machine, comprising: buckling the main machine (100);

the buckling and pressing host (100) comprises a host body and opposite opening and closing modules arranged on the host body; the opposite opening and closing die set comprises a fixed die (110) and a movable die (120) which can move relatively to realize opening and closing of the die;

the fixed mold (110) and the movable mold (120) both comprise slot petals and a plurality of split petals (130) which are arranged at intervals along an arc line, the slot petals (130) are arranged on the side surfaces of the fixed mold (110) opposite to the movable mold (120), and the slot petals (130) on the two sides are matched with each other in a mold closing state to form a combined split petal (140);

in the crimping process, the split petals (130) and the combined split petals (140) are simultaneously closed to the circle center of the circular arc to form an inner circular surface (150) for clamping a pipeline.

2. The pipe necking crimping machine according to claim 1, wherein the fixed die (110) and the movable die (120) are provided with corresponding slot petals, one of the two is provided with a circular arc concave surface (141) coinciding with a part of the circular surface of the inner circular surface (150), the outer side surface is provided with a concave platform (142), and the other one is provided with a convex platform (143) matching with the concave platform (142);

after the boss (143) is inserted into the concave table (142), the boss and the concave table have coplanar areas which are parallel to the side surfaces of the adjacent split petals (130).

3. The line pipe necking crimping machine of claim 1, wherein the stationary mold (110) and the movable mold (120) each comprise two or three of the split petals (130) and two of the socket petals;

the slot split dies (130) on the two sides are matched with each other in a matched die state to form two groups of combined split dies (140).

4. The line shrink crimping machine of claim 1, wherein the inner circular surface (150) has a radially equidistant gap between adjacent split petals (130), or between the split petals (130) and the split petals (140).

5. The pipe necking crimping machine according to claim 1, wherein the maximum opening range of the fixed die (110) and the movable die (120) in the open state is 60-80 mm.

6. The line crimper of claim 1, further comprising a hydraulic control device (200);

the hydraulic control device (200) is hydraulically connected with the movable mould (120) and is used for driving the movable mould (120) to be close to or far away from the fixed mould (110) so as to respectively realize mould closing or mould opening.

7. A method of pipe crimping using the pipe necking crimper of any one of claims 1-6, comprising the steps of:

the method comprises the following steps: forming a first inner circumferential surface (150) having a plurality of first gaps in a circumferential direction on an outer circumferential side of the pipeline;

step two: forming a second inner circumferential surface (150) having a plurality of second gaps in a circumferential direction on an outer circumferential side of the pipeline and pressurizing within a preset pressure range for a preset time range;

wherein the first gap is greater than the second gap, and the diameter of the first inner circular surface (150) is greater than the diameter of the second inner circular surface (150).

8. The method for crimping a pipeline according to claim 7, wherein in step two, crimp amount information and/or time information is received and compared with preset information ranges respectively, and if the corresponding preset information range is reached, the crimping is stopped.

9. The pipeline crimping method according to claim 8, wherein the preset crimp amount information range of the reinforcing core crimping pipe is 0.5mm to 2mm, and the preset crimp amount information range of the lead crimping pipe is 1mm to 5 mm;

the preset pressure range is 30 MPa-90 MPa;

the preset time range is 0-80 s.

10. A crimp tube obtained by the pipeline necking crimping machine of any one of claims 1 to 6 or the pipeline crimping method of any one of claims 7 to 9, wherein the outer circumferential surface of the crimp tube is provided with a plurality of sets of crimping projections in the circumferential direction, the crimping projections extending in the axial direction of the crimp tube.

Technical Field

The invention relates to the technical field of crimping equipment, in particular to a pipeline necking crimping machine, a pipeline crimping method and a crimping pipe.

Background

With the continuous development and progress of the comprehensive national power and socialist economy in China, the production and living level of residents is continuously improved, the power consumption is continuously increased, and the demand on power supply is higher and higher. With the continuous expansion of the construction scale of the power grid, particularly in the construction process of overhead transmission lines, the crimping process of the lead is widely applied. However, the problem of improper operation is caused in any link in the crimping process, which seriously affects the installation quality of the overhead power transmission line and causes accidents.

On the premise of increasing high-voltage grade and long-distance transmission lines, the quality requirements on key hardware fittings such as a wire strain clamp and a splicing hardware fitting are correspondingly improved in order to ensure the operation safety of the lines. The safe operation of the circuit is related to the quality of the conducting wire and the hardware fitting, and is also related to the connection form, the compression joint form and the like of the hardware fitting and the conducting wire, and the good compression joint method can ensure the good connection of the conducting wire and the hardware fitting and improve the safety of the circuit to a certain extent.

In the prior art, an upper die and a lower die (a hough die with hexagonal inner holes) are commonly used for crimping a wire or a reinforcing core, the reinforcing core in the crimping mode is unevenly stressed, and after the crimping is finished, burrs are easily generated at the die assembly position and the connection is not firm. Especially when overhead conductor or reinforcement core is connected with the link fitting of tower pole, because overhead conductor or reinforcement core and link fitting material and structure are different, current crimping mode, the crimping is insecure, influences mechanical properties.

According to the traditional hexagonal crimping method, a hexagonal crimping pipe (see figure 1) can be obtained, and for a large-section wire, particularly a large-section round wire, the holding force of a hardware and the wire after crimping is only 80% -87% of the calculated value of the wire breaking force. After the six-to-octagonal centripetal crimping method is adopted, the contact part of the aluminum pipe and the crimping die is uniformly deformed, the change quantity of the crimping quantity is consistent, the uniform deformation of the aluminum pipe ensures that the holding force of the aluminum pipe to the lead is uniformly applied in the circumferential direction, the phenomenon that the stress of the lead is not uniform in the crimping process is avoided, and the holding force of the hardware to the lead is theoretically improved. The six-octagonal centripetal crimping method has the advantages that the required compression amount is larger, the deformation area of the maximum compression amount is larger, the friction force of the aluminum pipe deformation on the lead is guaranteed, the problems that the large-section lead is not tightly crimped and the like are solved, and the holding force of the hardware on the whole lead is improved.

Therefore, the compression joint quality of the compression type strain clamp is improved by researching the compression joint process of the compression type strain clamp, and the compression joint process has great significance particularly for novel or large-section overhead conductors. The impact of the crimping quality of the overhead ground wire, the strain clamp and the connection on the line mainly comprises the following contents:

impact on power supply performance: if the crimping quality can not meet the requirement, the power supply quality and the power supply continuity of the circuit in normal operation are affected, and the splicing sleeve crimping quality can not meet the requirement, the resistance is increased, the energy consumption of the circuit in operation is overlarge, and the power supply stability and the power supply continuity are reduced. Influence on the operation safety of the line: in the process of operating the circuit, if the mechanical property of the connection part of the wire and the wire clamp or the splicing fitting cannot meet the design requirement, the normal, safe and stable operation of the circuit is directly influenced, accidents such as wire drop and the like are easily caused, the safe operation of a power system is seriously influenced, and serious economic loss and social influence are caused. Serious accidents such as disconnection are mostly caused by unqualified quality of equal-pressure connection of a strain clamp or a splicing fitting on a transmission line.

Disclosure of Invention

The invention aims to provide a pipeline necking crimping machine, a pipeline crimping method and a crimping pipe, which are used for solving the technical problems that the crimping is not firm and the mechanical performance is influenced by adopting the existing crimping mode in the prior art.

In a first aspect, the present invention provides a pipeline crimping machine, comprising: buckling the host;

the buckling and pressing host comprises a host body and opposite opening and closing modules arranged on the host body; the opposite opening and closing module comprises a fixed die and a movable die which can move relatively to realize opening and closing of the die;

the fixed die and the movable die respectively comprise slot split dies and a plurality of split dies arranged at intervals along an arc line, the slot split dies are arranged on the side faces of the fixed die and the movable die, and the slot split dies on the two sides are matched with each other in a die closing state to form combined split dies;

in the crimping process, the split petals and the combined split petals simultaneously draw close to the circle center of the circular arc to form an inner circular surface for clamping a pipeline.

Further, the slot split molds corresponding to the fixed mold and the movable mold are provided with an arc concave surface which is coincided with a partial circular surface of the inner circular surface, a concave table is arranged on the outer side surface, and a boss matched with the concave table is arranged on the other of the fixed mold and the movable mold;

after the boss is inserted into the concave table, the boss and the concave table are provided with coplanar areas, and the coplanar areas are parallel to the side faces of the adjacent split petals.

Furthermore, the fixed die and the movable die respectively comprise two or three split petals and two slot petals;

under the matched die state, the slot split dies on the two sides are mutually matched to form two groups of combined split dies.

Further, the inner circular surface is arranged between the adjacent split petals, or radial equidistant gaps are formed between the split petals and the combined split petals.

Further, the maximum opening range of the fixed die and the movable die in the die opening state is 60-80 mm.

Further, the pipeline necking crimping machine further comprises a hydraulic control device;

the hydraulic control device is hydraulically connected with the movable mould and is used for driving the movable mould to be close to or far away from the fixed mould so as to respectively realize mould closing or mould opening.

Has the advantages that:

according to the pipeline necking crimping machine provided by the invention, in the die closing process, the fixed die and the movable die move relatively to realize die closing, and meanwhile, slot split dies on two sides of the fixed die and the movable die are mutually matched to form a combined split die; on the other hand, as the side faces of the fixed die and the movable die opposite to each other are matched to form the combined split petals, on the basis of realizing the compression joint of pipelines, the split petals can be formed at intervals consistent with those of the adjacent split petals, and large intervals are not reserved after the fixed die and the movable die are matched because the split petals are not easily arranged on the edges of the two ends of the fixed die and the movable die.

In the crimping process, the split petals and the combined split petals are simultaneously closed to the circle center of the circular arc to form an inner circular surface for clamping the pipeline, and the split petals and the combined split petals synchronously act simultaneously, so that the uniform stress of the pipeline to be crimped at each radial position can be ensured, the problem of quality damage caused by uneven stress of the pipeline (a lead or a reinforcing core) is effectively solved, and the mechanical connection strength of the lead and a hardware fitting is improved. In addition, when the fixed die and the movable die move relatively to open the die, the pipeline can be taken and placed.

In a second aspect, the present invention provides a line crimping method using the line necking crimper of any one of the previous embodiments, comprising the steps of:

the method comprises the following steps: forming a first inner circular surface having a plurality of first gaps in a circumferential direction on an outer circumferential side of the pipeline;

step two: forming a second inner circumferential surface having a plurality of second gaps in a circumferential direction on an outer circumferential side of the pipeline, and pressurizing for a preset time range within a preset pressure range;

wherein the first gap is greater than the second gap and the diameter of the first inner circular surface is greater than the diameter of the second inner circular surface.

Further, in the second step, the crimping amount information and/or the time information are received and compared with the preset information range respectively, and if the corresponding preset information range is reached, the operation is stopped.

Furthermore, the preset crimping amount information range of the reinforced core crimping pipe is 0.5 mm-2 mm, and the preset crimping amount information range of the lead crimping pipe is 1 mm-5 mm;

the preset pressure range is 30 MPa-90 MPa;

the preset time range is 0-80 s.

Has the advantages that:

according to the pipeline crimping method provided by the invention, the pipeline necking crimping machine is utilized, so that the technical advantages and effects which can be achieved by the pipeline crimping method also comprise the technical advantages and effects which can be achieved by the pipeline necking crimping machine, and further description is omitted.

In a third aspect, the present invention provides a crimp pipe obtained by the line crimp machine according to any one of the preceding embodiments or the line crimp method according to any one of the preceding embodiments, wherein an outer circumferential surface of the crimp pipe is provided with a plurality of sets of crimp projections extending in an axial direction of the crimp pipe.

Has the advantages that:

the crimping pipe provided by the invention is obtained by using the pipeline necking crimping machine or the pipeline crimping method, so that the technical advantages and effects which can be achieved by the crimping pipe also comprise the technical advantages and effects which can be achieved by the pipeline necking crimping machine or the pipeline crimping method, and are not repeated herein.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a view showing a crimping pipe obtained by a conventional crimping method;

FIG. 2 is a schematic structural diagram of a pipe crimping machine provided by an embodiment of the invention in a mold closing state;

fig. 3 is a schematic structural diagram of a pipeline necking and crimping machine provided in the embodiment of the present invention in an open state;

FIG. 4 is a schematic diagram of a pipeline necking and crimping machine connected to a hydraulic control device according to an embodiment of the present invention;

FIG. 5 is a drawing of a crimp tube obtained by crimping with a line crimp machine according to an embodiment of the present invention.

Icon:

100-buckling the host; 110-fixing a mould; 120-moving the mold; 130-split flap mold; 140-combined split petals; 150-inner circular surface; 141-arc concave surface; 142-a concave platform; 143-a boss;

200-hydraulic control means;

300-hydraulic oil line.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 2 and 3, the present embodiment provides a pipeline crimping machine, including a crimping main machine 100; the buckling and pressing host 100 comprises a host body and opposite opening and closing modules arranged on the host body; the opposite opening and closing module comprises a fixed die 110 and a movable die 120 which can move relatively to realize opening and closing of the die; the fixed mold 110 and the movable mold 120 both comprise slot petals and a plurality of split petals 130 arranged at intervals along an arc line, the slot petals 130 are arranged on the opposite side surfaces of the fixed mold 110 and the movable mold 120, and the slot petals 130 on the two sides are mutually matched to form a combined split petal 140 in a mold closing state; during the crimping process, the split petals 130 and the combined split petals 140 simultaneously approach the center of the arc to form an inner circular surface 150 for clamping the pipeline.

In the pipe necking crimping machine provided by the embodiment, in the die closing process, the fixed die 110 and the movable die 120 move relatively to realize die closing, and meanwhile, the slot split dies 130 on the two sides of the fixed die 110 and the movable die 120 are matched with each other to form the combined split die 140, on one hand, the combined split die 140 can play a guiding role, so that the fixed die 110 and the movable die 120 can be precisely closed, an inner circular surface 150 for clamping a pipe can be formed in the crimping process, and preparation is made for uniform stress of the following pipe in the crimping process; on the other hand, since the combined split petals 140 can be formed by closing the side faces of the fixed mold 110 opposite to the movable mold 120, and the gap that is consistent with the gap of the adjacent split petals 130 can be formed by setting the split petals, the gap that is reserved after the fixed mold 110 and the movable mold 120 are closed can not be large because the split petals 130 are not easily arranged on the edges of the two ends of the fixed mold 110 and the movable mold 120 on the basis of realizing the pressure welding of the pipeline.

In the crimping process, the split petals 130 and the combined split petals 140 simultaneously approach to the circle center of the circular arc to form an inner circular surface 150 for clamping the pipeline, and the split petals 130 and the combined split petals 140 simultaneously synchronously act, so that the pipeline to be crimped is uniformly stressed at each radial position, the problem of quality damage caused by uneven stress of the pipeline (a lead or a reinforcing core) is effectively solved, and the mechanical connection strength of the lead and a hardware fitting is improved. In addition, when the fixed mold 110 and the movable mold 120 move relatively to open the mold, the pipeline can be taken and placed.

The pipeline in the embodiment comprises an overhead conductor, a reinforced core crimping pipe which is a circular pipe with concentric inner and outer cylindrical surfaces or a special pipe with the outer cylindrical surface coinciding with the geometric center line of the special-shaped through hole, and the like; the material of the transmission line hardware fitting can be metal or nonmetal material meeting the requirements of the transmission line hardware fitting, for example, the material is metal material such as 304 stainless steel, 306 stainless steel, manganese steel, carbon steel, aluminum pipe and the like.

Specifically, the movable mold 120 moves close to the fixed mold 110 to realize mold closing; the movable mold 120 moves away from the fixed mold 110 to open the mold.

The pipeline necking crimping machine of this embodiment can set up to upper and lower compound die, also can set up to control the compound die that opens and shuts, specifically can set up as required. When the pipeline necking crimping machine can be arranged to be opened and closed left and right, the pipeline can be taken in and out from the upper part.

It should be noted that the split petals 130 and the slot petals 130 (or the combined split petals 140, respectively) are respectively and correspondingly provided with a driving member capable of driving the split petals 130 and the slot petals 130 to move, so as to ensure that the split petals 130 and the combined split petals 140 simultaneously approach to the center of the circular arc.

Further, referring to fig. 3, the slot petals of the fixed mold 110 and the movable mold 120 correspond to each other, one of the two molds has a circular arc concave surface 141 coinciding with a part of the circular surface of the inner circular surface 150, and the outer side surface is provided with a concave platform 142, and the other one of the two molds is provided with a convex platform 143 matching with the concave platform 142; after the boss 143 is inserted into the recessed table 142, the two have a coplanar region, and the coplanar region is parallel to the side surface of the adjacent split petals 130.

In this embodiment, the fixed mold 110 and the movable mold 120 each include two or three split petals 130 and two slot petals; the slot petals 130 on both sides are matched with each other in a matched state to form two combined split petals 140.

It should be noted that when the fixed mold 110 and the movable mold 120 both include two split petals 130 and two slot petals, a six-petal mold can be formed; when the fixed mold 110 and the movable mold 120 both include three split petals 130 and two slot petals, eight petals can be formed. Wherein the width range of each mould is 20-50 mm; illustratively, the die width may be 20mm, 30mm, 40mm, 50 mm.

With continued reference to fig. 2, the inner circular surface 150 has a radial equidistant gap between adjacent split petals 130, or between the split petals 130 and the combined split petals 140.

It should be noted that the radial equidistant gaps at various positions are kept consistent in size, so that the uniformity of the stress on the pipeline is further improved on the basis of ensuring the formation of the inner circular surface 150.

In this embodiment, the maximum opening range of the fixed mold 110 and the movable mold 120 in the mold opening state is 60-80 mm; illustratively, the maximum opening of the fixed mold 110 and the movable mold 120 in the mold-opened state may be 60mm, 70mm, or 80mm to meet the crimping of a pipeline having an outer diameter of about 60 mm.

Referring to fig. 4, the line necking crimping machine further includes a hydraulic control device 200; the hydraulic control device 200 is hydraulically connected to the movable mold 120, and is used for driving the movable mold 120 to move closer to or away from the fixed mold 110, so as to respectively realize mold closing or mold opening.

Further, the hydraulic control device 200 is connected to the movable mold 120 through a line 300.

The hydraulic control device 200 may be a hydraulic station.

The working principle of the pipeline necking crimping machine provided by the embodiment is as follows: and 6-8 split petals 130 are controlled to move along the radial direction of the pipeline simultaneously to enable the pipeline on the inner side and the pipeline on the outer side to generate plastic deformation and seal gaps, the crimping quality is reliable, the crimping amount and the pressure value are controllable, and inching or full-automatic control is realized.

The working process of the pipeline necking crimping machine provided by the embodiment is as follows: putting a crimping pipe with an overhead conductor or a reinforcing core sleeved at one end into a 6-to 8-petal split petal mold 130 in an open state from the upper part of a crimping host machine 100;

adjusting the overhead conductor or the reinforced core crimping pipe to be in the mold middle position in the mold opening state, starting a hydraulic pump station, and driving the movable mold 120 to move through a hydraulic oil pipeline 300 connected with the crimping host 100; firstly, the slot split mold on the fixed mold 110 is matched with the slot split mold of the movable mold 120 to form a combined split mold 140; then, the split petals 130 and the combined split petals 140 move to the circle center position of the pipeline simultaneously to synchronously and uniformly apply pressure for crimping until the crimping is in place, and the overhead conductor crimping pipe is compressed;

and (3) the split petals 130 and the combined split petals 140 are in a die closing state and reach a set crimping amount or pressure value, pressure is maintained for a period of time according to the crimping process requirement, then the hydraulic pump station is controlled to open the die, and the crimped overhead conductor or the reinforced core is taken out from the upper side.

It should be noted that, the pipeline necking crimping machine of the embodiment can ensure that the overhead conductor or the reinforcing core crimping pipe is crimped on the overhead conductor or the reinforcing core under uniform radial stress, so that the mechanical performance of connection is improved, the safety of line operation is greatly improved, and the pipeline necking crimping machine has important application value. Reaching the pressure value of predetermineeing or crimping degree of depth crimping chance auto-stop pressurize a period in the crimping process, crimping chance sends the suggestion of reporting to the police simultaneously, guarantees withholding stability. In the perimeter of the cross section of a crimping pipe of the overhead conductor and the reinforcing core thereof, the total length proportion of the arcs occupied by each sub-mold is more than or equal to 70 percent, and the lengths are uniformly and evenly distributed. The die-stacked crimping can be carried out, namely, the crimping can be carried out in the area after the previous crimping when the next crimping is carried out.

The embodiment provides a pipeline crimping method using the pipeline necking crimping machine, which comprises the following steps:

the method comprises the following steps: forming a first inner circumferential surface 150 having a plurality of first gaps in a circumferential direction on an outer circumferential side of the manifold;

step two: forming a second inner circumferential surface 150 having a plurality of second gaps in a circumferential direction at an outer circumferential side of the pipeline and pressurizing for a preset time range within a preset pressure range;

wherein the first gap is greater than the second gap and the diameter of the first inner circular surface 150 is greater than the diameter of the second inner circular surface 150.

And in the second step, receiving the crimping amount information, the crimping amount information and/or the time information, comparing the crimping amount information, the crimping amount information and/or the time information with the preset information range respectively, and stopping if the corresponding preset information range is reached.

By adopting pressure control, size (crimping amount) control (self-selection adjustment) or time control, when the crimping time reaches a preset pressure value, crimping depth or crimping time, the crimping machine can automatically stop and maintain the pressure for a period of time, and simultaneously, the crimping machine can send an alarm prompt to ensure the crimping stability.

Specifically, the preset crimping amount information range of the reinforced core crimping pipe is 0.5 mm-2 mm, and the preset crimping amount information range of the lead crimping pipe is 1 mm-5 mm; the preset pressure range is 30 MPa-90 MPa; the preset time range is 0-80 s.

Preferably, the preset time range is 50-80 s, and the preset time can be 50s, 60s, 70s or 80 s.

Referring to fig. 5, the present embodiment provides a crimping pipe obtained by using the aforementioned pipe necking crimping machine or the aforementioned pipe crimping method, wherein the outer circumferential surface of the crimping pipe is provided with a plurality of sets of crimping projections along the circumferential direction, and the crimping projections extend along the axial direction of the crimping pipe.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.