Insulator steel foot local sealing and homogenizing type laser quenching device

Abstract

The invention relates to a local sealing and homogenizing type laser quenching device for insulator steel feet. The local sealing and homogenizing type laser quenching device comprises a water tank, a copper inner container, a copper outer cover and a laser transmitter, wherein the water tank and the copper inner container are each of a barrel structure with the upper end open and the lower end closed, the copper inner container is arranged in the water tank in a sleeved mode, and the copper inner container and the water tank are arranged in a spaced mode to form a cooling cavity; the copper outer cover covers the upper end openings of the water tank and the copper inner container; the center of the copper outer cover is provided with a through hole for accommodating an insulator steel pin, the copper outer cover is provided with an incidence hole, a concave lens is arranged in the incidence hole, and the laser emitter is arranged at the incidence hole; a plurality of hemispherical protrusions are evenly arranged on the inner wall of the copper inner container and the lower surface of the copper outer cover respectively. According to the laser quenching device, the insulator steel foot can be subjected to laser quenching in a packaging mode, the to-be-strengthened surface of the insulator steel foot is fully covered by laser through homogenization treatment on the laser, and the qualified rate and the production efficiency of local laser quenching of the insulator steel foot are improved.

Description

Technical Field

[0001] The invention relates to the technical field of laser quenching, and more specifically to a partially enclosed homogenized laser quenching device for an insulator steel foot. Background Art

[0002] Under severe climatic conditions such as strong winds, the load-bearing components of transmission lines, the insulator steel legs, face severe challenges. During long-term operation, the joint between the ball head and the bowl mouth is thinned due to wear, and the large impact load is easily caused to cause the steel legs to break. In response to this problem, the following solutions have been proposed: 1. Use the sol-coating method to prepare a new coating on the surface of the hardware to enhance the mechanical properties of the hardware surface and thus enhance the friction resistance of the hardware. However, the research and development cost of the new coating is high, and the process is complicated, so it cannot be widely used. 2. Use wear-resistant nesting at the worn position of the steel leg to improve the wear resistance of the insulator steel leg, but the production process is complicated and cannot completely solve the wear problem. 3. Use insulator steel legs with higher strength grades, but this will require tempering heat treatment or replacement of materials, which increases costs and wastes energy.

[0003] In order to solve the above problems, it is proposed to use laser quenching technology to quench the key wear area of ​​the insulator steel foot. This solution will not increase the load-bearing capacity of the insulator tower, and it is easy to realize automated production, which is expected to reduce costs and save energy.

[0004] Laser quenching technology is an advanced technology currently used for metal surface treatment. Through the high energy density of the laser, the metal surface temperature can be quickly increased and quickly cooled, achieving a quenching process in a very short time. Compared with traditional methods such as flame quenching and resistance heating quenching, laser quenching technology is suitable for surface quenching treatment of a variety of materials, has uniform quenching hardness, and can minimize the formation of defects such as deformation and cracks. In addition, laser quenching technology is easy to realize automated production, which can improve production efficiency and stability.

[0005] However, the existing laser quenching device is usually a rotary feed laser surface quenching device. When using this laser quenching device to perform laser surface quenching treatment on a local area of ​​the insulator steel leg, problems such as uneven surface treatment and over-treatment of the insulator steel leg are prone to occur. Summary of the invention

[0006] In view of this, the object of the present invention is to provide a partially enclosed homogenized laser quenching device for an insulator steel leg, aiming to solve the problems existing in the prior art.

[0007] According to the present invention, a partially enclosed homogenized laser quenching device for insulator steel legs is provided, which comprises: a water tank, a copper inner tank, a copper outer cover and a laser transmitter; wherein: The water tank and the copper liner are both cylindrical structures with an open upper end and a closed lower end. The copper liner is sleeved in the water tank, and a cooling cavity for containing cooling water is formed between the copper liner and the water tank. The copper outer cover is arranged on the upper openings of the water tank and the copper inner tank; A through hole for accommodating the insulator steel leg is arranged at the center of the copper outer cover, an incident hole is arranged on the copper outer cover, a concave lens is arranged in the incident hole, and the laser emitter is arranged at the incident hole; The inner wall of the copper liner and the lower surface of the copper outer cover are evenly provided with a plurality of hemispherical protrusions.

[0008] Preferably, a water inlet and a water outlet connected to the cooling cavity are arranged on the side wall of the water tank, and the water inlet and the water outlet are arranged at an interval of 180 degrees in the circumferential direction.

[0009] Preferably, the water inlet is arranged at the lower part of the side wall of the water tank, and the water outlet is arranged at the upper part of the side wall of the water tank.

[0010] Preferably, the axis of the incident hole is arranged at a preset angle with the upper surface of the copper outer cover, and the incident laser emitted by the laser emitter is parallel to the axis of the incident hole.

[0011] Preferably, the angle between the axis of the incident hole and the upper surface of the copper outer cover is 20°~40°.

[0012] Preferably, the angle between the axis of the incident hole and the upper surface of the copper outer cover is 30°.

[0013] Preferably, the lower surface of the copper outer cover is provided with an annular clamping protrusion, and the clamping protrusion is arranged between the copper inner liner and the water tank.

[0014] Preferably, the copper outer cover is formed by splicing two semicircular outer cover units.

[0015] Preferably, arc protrusions are provided at the corners of the bottom wall of the copper liner.

[0016] Preferably, the water tank and the top end of the copper inner tank are sealedly connected to the copper outer cover.

[0017] The insulator steel leg local closed homogenization laser quenching device provided by the present invention performs primary homogenization of the laser emitted by the laser transmitter through a concave lens in the incident hole, and then diverges and totally reflects on the surface of the closed inner cavity formed by the copper inner liner and the copper outer cover, thereby achieving laser homogenization, allowing the laser to fill the entire closed inner cavity, and finally achieving full coverage of the surface to be strengthened of the insulator steel leg by the laser, thereby improving the qualified rate and production efficiency of the local laser quenching of the insulator steel leg. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings.

[0019] Figure 1 A schematic structural diagram of a partially enclosed homogenized laser quenching device for an insulator steel leg according to an embodiment of the present invention is shown.

[0020] Figure 2 for Figure 1 Schematic diagram of the local structure at point A.

[0021] Figure 3 for Figure 1 Schematic diagram of the laser reflection from the arc-shaped protrusion at the bottom corner of the copper inner liner at B in the middle.

[0022] In the figure: 1. Water tank; 11. Water inlet; 12. Water outlet; 2. Copper inner tank; 3. Copper outer cover; 31. Entrance hole; 4. Insulator steel foot; 5. Laser transmitter; 6. Concave lens. DETAILED DESCRIPTION

[0023] Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, the same elements are represented by the same or similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale.

[0024] The present invention provides a partially enclosed homogenized laser quenching device for an insulator steel foot, see Figure 1 The partially closed homogenized laser quenching device for the insulator steel leg comprises: a water tank 1, a copper inner liner 2, a copper outer cover 3 and a laser emitter 5; wherein the water tank 1 and the copper inner liner 2 are both cylindrical structures with an upper end open and a lower end closed, the copper inner liner 2 is sleeved in the water tank 1, and a cooling cavity for containing cooling water is formed between the copper inner liner 2 and the water tank 1; the copper outer cover 3 is covered at the upper end openings of the water tank 1 and the copper inner liner 2; a through hole for accommodating the insulator steel leg 4 is provided at the center of the copper outer cover 3, an incident hole 31 is provided on the copper outer cover 3, a concave lens 6 is provided in the incident hole 31, and the laser emitter 5 is provided at the incident hole 31; the inner wall of the copper inner liner 2 and the lower surface of the copper outer cover 3 are respectively and evenly provided with a plurality of hemispherical protrusions.

[0025] The partially enclosed homogenized laser quenching device for the insulator steel foot forms a closed inner cavity through the copper inner liner 2 and the copper outer cover 3. The ball head of the insulator steel foot and the partial area of ​​the rod near the ball head are enclosed in the closed inner cavity. The laser emitted by the laser emitter 5 is homogenized by the concave lens 6 in the incident hole 31, and then diverges and totally reflects on the surface of the closed inner cavity formed by the copper inner liner 2 and the copper outer cover 3, thereby achieving the homogenization of the laser, so that the laser can fill the entire closed inner cavity, and finally achieve the full coverage of the surface to be strengthened of the insulator steel foot 4 by the laser. When the partially enclosed homogenized laser quenching device for the insulator steel foot is used for laser quenching, when the prescribed laser irradiation time is over, the laser emitter 5 is turned off to allow the insulator steel foot 4 to cool naturally to complete the quenching of the metal on the surface of the insulator steel foot 4.

[0026] Specifically, the hemispherical protrusions on the inner wall of the copper liner 2 and the lower surface of the copper outer cover 3 are polished to achieve a better reflection effect on the laser. At the same time, in order to avoid excessive processing of the extended surface of the bottom connection position of the insulator steel foot 4, the bottom wall corners of the copper liner 2 are provided with arc protrusions (see Figure 3 ) to increase the scattering and reflection effects of the incident laser in the closed cavity, thereby increasing the reflection area for better reflection of the laser.

[0027] Furthermore, a water inlet 11 and a water outlet 12 connected to the cooling cavity are provided on the side wall of the water tank 1, and the water inlet 11 and the water outlet 12 are arranged at intervals of 180 degrees in the circumferential direction. The cooling water enters the cooling cavity from the water inlet 11, and the cooling water with a higher temperature after absorbing the heat of the copper liner 2 is discharged from the water outlet 12. The copper liner 2 is physically cooled by the circulating water flow of the cooling cavity to prevent the surface of the copper liner 2 from excessively absorbing the laser energy during the laser treatment process and causing damage to the device. In this embodiment, the water inlet 11 is provided at the lower part of the side wall of the water tank 1, and the water outlet 12 is provided at the upper part of the side wall of the water tank 1. Water naturally descends due to gravity and enters the cooling cavity from the lower water inlet 11. Then, due to the principle of thermal expansion and contraction, the density of the heated water decreases, and it naturally rises and is discharged from the high water outlet 12; the cold water has a larger density and will sink, so that convection is naturally formed, which helps to improve the cooling efficiency.

[0028] Furthermore, if Figure 2As shown, the axis of the incident hole 31 is set at a preset angle with the upper surface of the copper outer cover 3, and the incident laser emitted by the laser emitter 5 is parallel to the axis of the incident hole 31. By setting the incident hole 31 obliquely, the irradiation area of ​​the incident laser light emitted by the laser emitter 5 to the closed inner cavity can be increased. Preferably, the angle between the axis of the incident hole 31 and the upper surface of the copper outer cover 3 is 20°~40°. In this embodiment, the angle between the axis of the incident hole 31 and the upper surface of the copper outer cover 3 is 30°.

[0029] Furthermore, the lower surface of the copper outer cover 3 is provided with an annular clamping protrusion, and the clamping protrusion is provided between the copper inner liner 2 and the water tank 1. Specifically, the annular clamping protrusion is concentrically arranged with the through hole provided at the center of the copper outer cover 3, and the clamping protrusion is clamped between the copper inner liner 2 and the water tank 1, so that the copper inner liner 2 and the water tank 1 can also be kept concentrically arranged, and the gap between the copper inner liner 2 and the water tank 1 can be kept uniform, and the insulator steel foot 4 inserted into the closed inner cavity through the through hole at the center of the copper outer cover 3 can also be kept at the center position of the copper inner liner 2, ensuring the coaxiality of the insulator steel foot 4 and the copper inner liner 2, so that when laser quenching is performed, the laser can be irradiated more evenly on the surface of the insulator steel foot 4. In this embodiment, the copper outer cover 3 is formed by splicing two semicircular outer cover units, and the size of the through hole of the spliced ​​copper outer cover 3 matches the rod of the insulator steel foot 4, so as to better achieve the closure of the closed inner cavity and facilitate the removal and placement of the insulator steel foot 4.

[0030] Furthermore, the top of the water tank 1 and the copper inner liner 2 are sealed and connected to the copper outer cover 3. In specific implementation, a sealing strip is provided at the position corresponding to the top of the water tank 1 and the top of the copper inner liner 2 on the lower surface of the copper outer cover 3, so as to achieve a sealing effect after the copper outer cover 3 is closed, and prevent the cooling water in the cooling cavity from entering the copper inner liner 2 or overflowing to the outside of the water tank 1.

[0031] The present invention solves the problem of uneven treatment and over-treatment of the non-standard axial cylindrical surface of the insulator steel foot in the existing laser surface quenching device. In view of the problem of uneven quenching caused by the difference in laser defocus and incident angle in the current curved surface laser surface treatment, as well as the problem of overlapping quenching lap bands, the insulator steel foot partially closed and homogenized laser quenching device provided by the present invention realizes multi-level homogenization treatment of the incident laser emitted by the laser transmitter through a concave lens and a hemispherical convex reflective surface on the inner surface of the closed inner cavity, so as to ensure that the laser can evenly cover the structural surface of the insulator steel foot to be strengthened. The present invention replaces the traditional rotary feed laser surface quenching device, and wraps the insulator steel foot to be strengthened part with a closed inner cavity formed by a copper inner liner and a copper outer cover, which not only ensures the integrity of the quenched surface, but also realizes the convergence of laser energy.

[0032] The partially enclosed homogenized laser quenching device for insulator steel legs provided by the present invention performs laser quenching by encapsulating the local surface of the insulator steel legs. Compared with the traditional rotary feed device laser quenching device, the device increases the selection effect of the insulator steel legs to be quenched, while reducing heat loss. In addition, the device realizes the total reflection effect of the laser inside, so that the laser can be randomly and evenly reflected and filled on the surface of the insulator steel legs to be quenched, thereby reducing the problem of uneven surface treatment and over-treatment caused by changes in the laser focus position. The operation of the device mainly includes the control of the laser power and the time of the laser transmitter. It is easy to operate and can effectively improve the qualified rate and production efficiency of product processing.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0034] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A partially enclosed homogenized laser quenching device for insulator steel legs, characterized in that: include: Water tank, copper inner tank, copper outer cover and laser transmitter; among them, The water tank and the copper liner are both cylindrical structures with an open upper end and a closed lower end. The copper liner is sleeved in the water tank, and a cooling cavity for containing cooling water is formed between the copper liner and the water tank. The copper outer cover is arranged on the upper openings of the water tank and the copper inner tank; A through hole for accommodating the insulator steel leg is arranged at the center of the copper outer cover, an incident hole is arranged on the copper outer cover, a concave lens is arranged in the incident hole, and the laser emitter is arranged at the incident hole; The inner wall of the copper liner and the lower surface of the copper outer cover are evenly provided with a plurality of hemispherical protrusions.

2. The partially enclosed homogenized laser quenching device for insulator steel legs according to claim 1 is characterized in that: A water inlet and a water outlet communicated with the cooling cavity are arranged on the side wall of the water tank, and the water inlet and the water outlet are arranged at intervals of 180 degrees along the circumferential direction.

3. The partially enclosed homogenized laser quenching device for insulator steel legs according to claim 2 is characterized in that: The water inlet is arranged at the lower part of the side wall of the water tank, and the water outlet is arranged at the upper part of the side wall of the water tank.

4. The partially enclosed homogenized laser quenching device for insulator steel legs according to claim 1 is characterized in that: The axis of the incident hole is arranged at a preset angle with the upper surface of the copper outer cover, and the incident laser emitted by the laser transmitter is parallel to the axis of the incident hole.

5. The partially enclosed homogenized laser quenching device for insulator steel legs according to claim 4 is characterized in that: The angle between the axis of the incident hole and the upper surface of the copper outer cover is 20° to 40°.

6. The partially enclosed homogenized laser quenching device for insulator steel legs according to claim 5, characterized in that: The angle between the axis of the incident hole and the upper surface of the copper outer cover is 30°.

7. The partially enclosed homogenized laser quenching device for insulator steel legs according to claim 2, characterized in that: The lower surface of the copper outer cover is provided with an annular clamping protrusion, and the clamping protrusion is arranged between the copper inner liner and the water tank.

8. The partially enclosed homogenized laser quenching device for insulator steel legs according to claim 7, characterized in that: The copper outer cover is formed by splicing two semicircular outer cover units.

9. The partially enclosed homogenized laser quenching device for insulator steel legs according to claim 1, characterized in that: Arc protrusions are arranged at the corners of the bottom wall of the copper inner container.

10. The partially enclosed homogenized laser quenching device for insulator steel legs according to claim 1, characterized in that: The water tank and the top of the copper inner container are sealedly connected to the copper outer cover.

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