Multi-die crimping device for grounding wire fitting of power transmission line

Abstract

The invention relates to the technical field of ground wire fitting multi-mold crimping, in particular to a power transmission line ground wire fitting multi-mold crimping device, which comprises a fixed seat, a movable seat and a crimping assembly, and is characterized in that the movable seat and the fixed seat are oppositely arranged; the number of the crimping assemblies is two, the crimping assemblies are symmetrically arranged on the fixed seat and the movable seat respectively, each crimping assembly comprises a first die holder and second die holders symmetrically arranged on the two sides of the first die holder, and pressing dies are installed on the first die holders and the second die holders respectively. The movable seat can drive the pressing dies to be arranged in the circumferential direction by approaching the fixed seat so as to form a polygonal die cavity. The movable seat is close to the fixed seat to drive the pressing dies to be arranged in the circumferential direction to form the polygonal die cavity, simultaneous pressing connection of all faces of a polygon of a wire fitting is achieved through single driving, pressing force is uniform, and the flash generation probability in the pressing connection process is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of multi-die crimping of ground wire hardware, and in particular to a multi-die crimping device for ground wire hardware of a power transmission line. Background Art

[0002] Power lines widely utilize metal accessories made of iron, aluminum, or aluminum alloys. These accessories (iron, aluminum, or aluminum alloys) are used to connect equipment and conductors, conductors and wires, transmission line wires themselves, and insulators in distribution equipment in step-up and step-down substations, as well as to protect wires and insulators. Power fittings primarily connect and combine various devices in the power system, transmitting mechanical and electrical loads and providing some form of protection. The power fittings used for overhead transmission lines are called line fittings. Line fittings are used to connect conductors, insulators, insulators to poles, and insulators to conductors on overhead transmission lines. They must possess sufficient mechanical strength and flexibility in assembly and operation.

[0003] The most common method for crimping hardware for transmission line conductors is the clamping method, which involves hydraulically driving a lower semi-hexagonal die to close and squeeze the upper fixed semi-hexagonal die to achieve plastic deformation of the hardware. Its disadvantages include: 1) asymmetric contact during the crimping process, which can easily produce flash and affect the transmission of crimping force; 2) the semi-hexagonal die tends to self-lock with the workpiece after crimping, making it difficult to remove the hardware from the die; and 3) low crimping efficiency and the need for manual alignment, which is difficult and inaccurate. Summary of the Invention

[0004] The present application provides a multi-mold crimping device for ground wire hardware of power transmission lines, which is used to solve the problem in the prior art that the lower semi-hexagonal mold and the upper fixed semi-hexagonal mold have asymmetric contact during the crimping process, which easily produces burrs and affects the transmission of crimping force values.

[0005] The present application provides a multi-die crimping device for ground wire fittings of a power transmission line, comprising: Fixed seat; The movable seat is arranged opposite to the fixed seat; The crimping assembly includes two groups, which are symmetrically arranged on the fixed base and the movable base respectively. Each group of crimping assemblies includes a first die base and a second die base symmetrically arranged on both sides of the first die base. The first die base and the second die base are respectively equipped with a pressing die; The movable seat can drive the pressing die to be arranged along the circumferential direction to form a polygonal mold cavity by approaching the fixed seat.

[0006] In one possible design, the fixed seat is recessed upward and the movable seat is recessed downward to form a half-cavity with an isosceles trapezoidal longitudinal cross-section. The first mold base is fixedly installed on the middle plane of the half-cavity, and the second mold base is slidably installed on the side slope of the half-cavity.

[0007] In a possible design, slide rails are respectively provided on the oblique side surfaces of the half-cavity, and guide blocks are respectively provided on the second mold base. The guide blocks slide in cooperation with the slide rails so that the second mold base can move along the corresponding slide rails.

[0008] In one possible design, the slide rail has a first end and a second end that are relatively arranged, the first end is close to the middle plane, and the second end is far away from the middle plane. A spring is arranged between the first end and the second mold base, and the length direction of the spring is parallel to the slide rail.

[0009] In a possible design, mold base limiting blocks are respectively provided on the fixed seat and the movable seat near the second end of the slide rail, and the mold base limiting blocks are used to prevent the second mold base from sliding out of the slide rail.

[0010] In a possible design, adjacent surfaces of two adjacent second mold bases can be connected by a chimeric structure.

[0011] In a possible design, the pressing die is connected to the first die base and the second die base by a snap-fit structure.

[0012] In a possible design, the crimping device further includes a mold limit block, which is arranged at the connection between the pressing mold and the first mold base and the second mold base.

[0013] In one possible design, the crimping device also includes a top cover and a base that are arranged relatively to each other. The top cover and the base are connected by a snap-fit structure. The top cover is used to install the fixed seat. A driving member is provided on the base, and the driving end of the driving member is connected to the movable seat.

[0014] In a possible design, the crimping device further includes a locking block disposed at the connection between the top cover and the base.

[0015] In one possible design, the crimping device further includes a blowing hole, which is opened on the side slope of the half cavity and is located around the first end of the slide rail, for blowing compressed gas into the gap between the first mold base and the second mold base.

[0016] The beneficial effects of this application are as follows: The multi-die crimping device for the power transmission line ground wire fittings of the present application forms a polygonal mold cavity by driving the dies to be arranged circumferentially by bringing the movable seat close to the fixed seat, thereby realizing simultaneous crimping of each polygonal face of the conductor fittings with a single drive, uniform pressing force, and reducing the probability of flash generation during the crimping process; the polygonal dies crimp simultaneously without the need for manual centering, and high pressing efficiency; different dies can be replaced to achieve crimping of conductor fittings of different specifications, and the device is universal; the device consists of two upper and lower units, and the connection and separation of the units are achieved through a snap-on structure, which facilitates the insertion and removal of the ground wire fittings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A schematic structural diagram of a multi-mold crimping device for ground wire fittings for power transmission lines provided in an embodiment of the present application in a ready state; Figure 2 A schematic structural diagram of a multi-mold crimping device for ground wire fittings for a power transmission line provided in an embodiment of the present application, which is about to enter a crimping state; Figure 3 A schematic structural diagram of the multi-mold crimping device for ground wire fittings for power transmission lines provided in an embodiment of the present application in the final crimping state; Figure 4 A schematic structural diagram of the slide rails and springs of the multi-mold crimping device for ground wire fittings for power transmission lines provided in an embodiment of the present application; Figure 5 A schematic diagram of the assembly structure of a pressing die and a second die base of a multi-die crimping device for ground wire fittings for power transmission lines provided in an embodiment of the present application; Figure 6 Schematic diagram of the air blowing hole of the multi-mold crimping device for the ground wire fittings of the power transmission line provided in an embodiment of the present application.

[0019] Reference numerals: 110. Fixed seat; 111. Middle plane; 112. Side slope; 120. Movable seat; 210. First die base; 220. Second die base; 221. Guide block; 300. Press die; 400. Slide rail; 500. Spring; 610. Die base limit block; 620. Die limit block; 630. Locking block; 710. Wedge-shaped protrusion; 720. Wedge-shaped groove; 810. Top cover; 820. Base; 900. Blow hole. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions of this application in conjunction with the embodiments. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0021] The following combination Figures 1-6 , describing the multi-mold crimping device for the ground wire hardware of the power transmission line provided in the embodiment of the present application.

[0022] Reference Figure 1 、 Figure 2 、 Figure 3 As shown, the multi-mold crimping device for ground wire fittings for power transmission lines provided in an embodiment of the present application includes a fixed base 110, a movable base 120, and a crimping assembly. The movable base 120 is arranged opposite the fixed base 110, and is located below the fixed base 110. The movable base 120 can move up and down to move closer to or away from the fixed base 110.

[0023] The fixed seat 110 is recessed upward to form a half-cavity with an isosceles trapezoidal longitudinal section, and the movable seat 120 is recessed downward to form a half-cavity with an isosceles trapezoidal longitudinal section. When the movable seat 120 moves upward and contacts the fixed seat 110, the two half-cavities together form a complete hexagonal cavity.

[0024] A set of crimping assemblies is respectively disposed in the half-cavities of the fixed seat 110 and the movable seat 120. Each set of crimping assemblies includes a first die seat 210 and a second die seat 220 symmetrically disposed on either side of the first die seat 210. The inner walls of the half-cavities of the fixed seat 110 and the movable seat 120 are used to mount the first die seat 210 and the second die seat 220. Specifically, the inner walls of the half-cavities include a center plane 111 and symmetrically disposed side slopes 112. The first die seat 210 is fixedly mounted on the center plane 111 of the half-cavity via bolts, and the second die seat 220 is slidably mounted on the side slopes 112 of the half-cavity. For example, a guide block 221 is formed at the bottom of the second die seat 220, and a slide rail 400 is provided on the side slopes 112 of the half-cavity. The outer surface of the guide block 221 slides with the slide rail 400, and the slide rail 400 is longer than the length of the guide block 221, enabling the second die seat 220 to move along the slide rail 400. A pressing die 300 is mounted on the side of the first die base 210 away from the midplane 111, and another pressing die 300 is mounted on the side of the second die base 220 away from the side slope 112. As the movable base 120 moves upward toward the fixed base 110, the second die base 220 can move along the slide rail 400, thereby driving the pressing dies 300 to align circumferentially to form a circumferentially closed polygonal mold cavity, thereby achieving the crimping and forming of the electrical hardware.

[0025] Reference Figure 4 As shown, in some specific embodiments, the slide rail 400 has a first end and a second end that are arranged opposite each other, with the first end being closer to the middle plane 111 and the second end being farther away from the middle plane 111. A spring 500 is disposed in the slide rail 400 between the first end and the second die holder 220. One end of the spring 500 is welded to the end wall of the first end of the slide rail 400, and the other end of the spring 500 is welded to the guide block 221 of the second die holder 220. The length of the spring 500 is parallel to the slide rail 400. In this way, first, the spring 500 can overcome the gravity of the second die holder 220, preventing the upper and lower second die holders 220 from being misaligned due to their own weight, resulting in damage to the die holders or crimping failure. Second, after crimping is completed, the second die holder 220 and the first die holder 210 can be spread apart to facilitate removal of the crimped component.

[0026] In some specific embodiments, a mold base limit block 610 is respectively provided on the fixed base 110 and the movable base 120 near the second end of the slide rail 400. The mold base limit block 610 is used to prevent the guide block 221 of the second mold base 220 from sliding out from the second end of the slide rail 400.

[0027] Reference Figure 1 、 Figure 2 As shown, in some embodiments, adjacent surfaces of two adjacent second mold bases 220 can be engaged via a chimeric structure. Specifically, the second mold base 220 located on the left side of the fixed base 110 and the second mold base 220 located on the left side of the movable base 120 are adjacent second mold bases 220; the second mold base 220 located on the right side of the fixed base 110 and the second mold base 220 located on the right side of the movable base 120 are adjacent second mold bases 220. In some specific embodiments, a wedge-shaped protrusion 710 is provided on the lower end surface of the second mold base 220 of the fixed base 110, and a wedge-shaped groove 720 is provided on the upper end surface of the second mold base 220 of the movable base 120. When the movable seat 120 moves upward, the wedge-shaped protrusion 710 can be inserted downward into the wedge-shaped groove 720, thereby realizing the connection between the two second mold bases 220 opposite to each other, preventing the lateral relative displacement between the two second mold bases 220 opposite to each other during the upward movement of the movable seat 120, ensuring that each polygonal surface of the wire fitting is crimped at the same time, making the pressing force uniform, and reducing the probability of flashing during the crimping process.

[0028] Reference Figure 5As shown, in some specific embodiments, the die 300 is connected to the first die base 210 and the second die base 220 by a snap-fit structure. For example, a T-block is provided at the bottom of the die 300, and T-slots are provided on the first die base 210 and the second die base 220. The T-block and the T-slot cooperate with each other to achieve snap-fit fixation. In some specific embodiments, the crimping device further includes a mold limit block 620, which is respectively provided at the connection between the die 300 and the first die base 210 and the second die base 220. Specifically, the mold limit block 620 is fixed to both ends of the T-slot by bolts to prevent the T-block from sliding out of the T-slot.

[0029] Reference Figure 1 As shown, the crimping device also includes a top cover 810 and a base 820 that are arranged relative to each other. The top cover 810 and the base 820 are connected by a snap-fit structure. For example, a T-block is provided at the upper end of the base 820, and a T-slot is provided at the lower end of the top cover 810. The T-block and the T-slot cooperate with each other to achieve snap-fit fixation. The fixed seat 110 is mounted on the fixed seat 110 by bolts. The movable seat 120 is placed on the base 820. A driving member is also installed in the base 820. For example, a cylinder is installed in the base 820. The driving end of the cylinder extends upward and is connected to the lower end of the movable seat 120. The movement of the cylinder can drive the movable seat 120 up and down. In other embodiments, the driving member can also be electrically driven or hydraulically driven.

[0030] In some specific embodiments, the crimping device further includes a locking block 630, which is disposed at the connection between the top cover 810 and the base 820. The locking block 630 is fixed to both ends of the T-slot by bolts to prevent the T-block from sliding out of the T-slot.

[0031] Reference Figure 6 As shown, in some specific embodiments, the crimping device further includes air holes 900. These air holes 900 are located on the side slope 112 of the half-mold cavity, around the first end of the slide rail 400, and are used to blow compressed gas into the gap between the first mold base 210 and the second mold base 220. In some specific embodiments, the air holes 900 include multiple rows arranged in a rectangular array, distributed on both sides of the slide rail 400. Air cavities are also provided in the fixed base 110 and the movable base 120, and all of the air holes 900 are connected to the air cavities. An air pipe is also provided in the fixed seat 110 and the movable seat 120 respectively. One end of the air pipe is connected to the inlet of the air cavity, and the other end of the air pipe is connected to the air compressor. The air compressor can blow compressed gas evenly into the gap between the first die base 210 and the second die base 220 through the air pipe, the air cavity and the blowing hole 900. The compressed gas generates gas resistance to prevent the electrical hardware from being squeezed into the gap between the first die base 210 and the second die base 220 during the crimping process, thereby avoiding the generation of flash.

[0032] If the ambient temperature is too low, the ductility of the material deteriorates, and flash is easily generated. In some specific embodiments, a heating component is further included, and the heating components are respectively arranged in the fixed seat 110 and the movable seat 120, for heating the gas in the trachea. For example, a heating sleeve is provided around the trachea, and the heating sleeve includes an outer insulating layer and an inner heating element, such as a heating wire. When powered on, the heating element heats up, and the air in the trachea is heated by heat conduction, and the crimping temperature is controlled at about 20°C-30°C to improve the forming performance of the material and avoid the generation of flash.

[0033] The working process of the multi-die crimping device for ground wire fittings of power transmission lines in this application is as follows: Figure 1 To prepare the crimping device for working, the top cover 810 can be slid off the base 820, and the die 300 can be replaced according to the model and specifications of the workpiece to be pressed. After the die 300 is replaced, the T-slot of the top cover 810 and the T-block of the base 820 are engaged with each other, and the locking block 630 is closed.

[0034] Insert the connected pressed workpiece (electrical hardware) close to the die 300, start the cylinder to drive the movable seat 120 to move upward, and then the interlocking structures of the two second die seats 220 facing each other are in contact and interlocked. Figure 2 As shown, at this time, the crimping device is about to enter the crimping state.

[0035] The cylinder continues to move upward, and under the guidance of the slide rail 400 of the side slope 112 of the fixed seat 110 and the movable seat 120, the second die base 220 and the first die base 210 are pushed to contract radially, and all the dies 300 contact each other to achieve the gathering and pressing of the regular hexagonal dies 300. Figure 3 As shown, the crimping device is now in the working state of finishing crimping.

[0036] After the crimping is completed, the cylinder drives the movable seat 120 to move downward, and the first die base 210 and the second die base 220 open under the tension of the spring 500, and the pressed workpiece (electrical hardware) falls off. The locking block 630 is opened, the top cover 810 and the base 820 are separated from each other, and the pressed workpiece is taken out.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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, and therefore should not be understood as a limitation on the present application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0039] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0040] In this application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0041] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A multi-die crimping device for ground wire fittings of power transmission lines, characterized in that: include: Fixed seat; A movable seat, arranged opposite to the fixed seat; The crimping assembly includes two groups, which are symmetrically arranged on the fixed base and the movable base respectively. Each group of the crimping assembly includes a first die base and a second die base symmetrically arranged on both sides of the first die base. The first die base and the second die base are respectively equipped with a pressing die; The movable seat can drive the pressing dies to be arranged along the circumferential direction to form a polygonal mold cavity by approaching the fixed seat.

2. The multi-die crimping device for ground wire fittings of power transmission lines according to claim 1, characterized in that: The fixed seat is recessed upward and the movable seat is recessed downward to form a half-cavity with an isosceles trapezoidal longitudinal section. The first mold base is fixedly installed on the middle plane of the half-cavity, and the second mold base is slidably installed on the side slope of the half-cavity.

3. The multi-die crimping device for ground wire fittings of power transmission lines according to claim 2, characterized in that: Slide rails are respectively provided on the oblique side surfaces of the half-cavity, and guide blocks are respectively formed on the second mold base. The guide blocks are slidably matched with the slide rails to enable the second mold base to move along the corresponding slide rails.

4. The multi-die crimping device for ground wire fittings of power transmission lines according to claim 3, characterized in that: The slide rail has a first end and a second end that are oppositely arranged, the first end is close to the middle plane, and the second end is away from the middle plane. A spring is arranged between the first end and the second mold base, and the length direction of the spring is parallel to the slide rail.

5. The multi-die crimping device for ground wire fittings of power transmission lines according to claim 4, characterized in that: A mold base limiting block is respectively provided on the fixed seat and the movable seat at a position close to the second end of the slide rail, and the mold base limiting block is used to prevent the second mold base from sliding out of the slide rail.

6. The multi-die crimping device for ground wire fittings of a power transmission line according to any one of claims 1 to 5, characterized in that: Adjacent surfaces of two adjacent second mold bases can be connected by a chimeric structure.

7. The multi-die crimping device for ground wire fittings of a power transmission line according to claim 6, characterized in that: The pressing die is connected to the first die base and the second die base by a clamping structure.

8. The multi-die crimping device for ground wire fittings of power transmission lines according to claim 7, characterized in that: It also includes a mold limiting block, which is arranged at the connection between the pressing mold and the first mold base and the second mold base.

9. The multi-die crimping device for ground wire fittings of power transmission lines according to claim 6, characterized in that: It also includes a top cover and a base that are arranged opposite to each other. The top cover and the base are connected by a snap-fit structure. The top cover is used to install the fixed seat. A driving member is provided on the base, and a driving end of the driving member is connected to the movable seat.

10. The multi-die crimping device for ground wire fittings of power transmission lines according to claim 9, characterized in that: It also includes a locking block, which is arranged at the connection between the top cover and the base.

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