CN111001979A

CN111001979A - Method for disassembling drainage plate

Info

Publication number: CN111001979A
Application number: CN201911228686.9A
Authority: CN
Inventors: 岳楹超; 梁永纯; 吕旺燕; 董重里; 黄丰
Original assignee: Guangdong Power Grid Co Ltd; Electric Power Research Institute of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Electric Power Research Institute of Guangdong Power Grid Co Ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-04-14
Anticipated expiration: 2039-12-04
Also published as: CN111001979B

Abstract

The application relates to the technical field of electrical equipment, in particular to a method for disassembling a drainage plate, which comprises the following steps: carrying out low-temperature treatment on the two drainage plates welded together by tin solder so as to separate the two drainage plates welded together by the tin solder; wherein the temperature of the low-temperature treatment is 13 ℃ or lower. This application utilizes tin when the temperature is less than 13 ℃, white tin can be cracked into powdered grey tin, make white tin take place the tin epidemic reaction, the tin soldering layer between two drainage plates that will be in the same place through the soldering material welding is transformed into breakable grey tin gradually, make the staff can part two drainage plates very easily, under the prerequisite that can in close contact with between two drainage plates not influencing, easy dismantlement and change between two drainage plates have been guaranteed, solve the technical problem that prior art's drainage plate through welded fastening is difficult to dismantle effectively.

Description

Method for disassembling drainage plate

Technical Field

The application relates to the technical field of electrical equipment, in particular to a method for disassembling a drainage plate.

Background

The strain clamp on the transmission line is an important electric power fitting, and the drainage plate of the strain clamp needs to bear the pressure of a lead and has good electrical performance. At present, two sheet-shaped drainage plates are connected and fixed by bolts in the conventional drainage plate applied to a common power transmission line, and the drainage plate has the characteristics of simple structure, small processing difficulty and low cost. Though it is all more convenient to dismantle with the installation through bolted drainage plate, but two drainage plates through bolted fixation can be because of the accumulated wind pendulum of day and month bad contact, and the drainage plate bad contact leads to the fastener to generate heat easily, influences transmission line's steady operation.

In order to solve the problem of poor contact between two drainage plates, the existing surface that also has two drainage plates of assurance through the welded mode can the in close contact with, but two drainage plates after the welding are difficult to dismantle, and inconvenient staff dismantles and more renews the drainage plate, therefore the demand is convenient with the dismantlement method that two welded drainage plates separated, realizes realizing under the prerequisite that can the in close contact with between two drainage plates, has still guaranteed to dismantle and change between two drainage plates.

Disclosure of Invention

In view of this, an object of the present application is to provide a method for detaching a drainage plate, which effectively solves the technical problem that the drainage plate fixed by welding in the prior art is difficult to detach, and ensures easy detachment and replacement between two drainage plates without affecting the close contact between the two drainage plates.

In order to achieve the purpose, the application provides the following technical scheme:

a method for disassembling a drainage plate comprises the following steps: carrying out low-temperature treatment on the two drainage plates welded together by tin solder so as to separate the two drainage plates welded together by the tin solder; wherein the temperature of the low-temperature treatment is 13 ℃ or lower.

Preferably, in the above drainage plate, the temperature of the low-temperature treatment is-33 ℃ or lower.

Preferably, in the above-mentioned flow guide plates, the low-temperature treatment is specifically to reduce the temperature of the two flow guide plates by using a solid-state cold source, a liquid-state cold source or a gaseous-state cold source.

Preferably, in the above-mentioned flow guide plates, the low-temperature treatment is to wrap dry ice or ice on the two flow guide plates by using a heat insulating material.

Preferably, in the above drainage plate, the time for the low-temperature treatment is at least 30 min.

Preferably, in the above-described flow guide plate, after the low-temperature treatment, the junction of the two flow guide plates is washed to facilitate separation of the two flow guide plates.

Specifically, organic solvents are adopted for washing the two drainage plates, and the organic solvents comprise alcohol, acetone, diethyl ether, ethyl acetate, isopropanol turpentine, benzene and xylene.

Preferably, in the drainage plate, a groove is formed in the surface of any one of the drainage plates, the groove is filled with molten tin solder, and the two drainage plates are pressed to be connected in a sealing manner through the tin solder.

Preferably, in the above-mentioned drainage plate, the groove is embodied as an annular groove.

Preferably, in the above-mentioned drainage plate, the number of the annular grooves is at least two, and all the annular grooves are concentrically arranged on the surface of any one of the drainage plates.

Preferably, in the drainage plate, the tin solder is mainly made of 98.3-99.3% by mass of tin powder and 0.7-1.7% by mass of copper powder.

Compared with the prior art, the beneficial effects of this application are:

the application provides a method for disassembling a drainage plate, which comprises the following steps: carrying out low-temperature treatment on the two drainage plates welded together by tin solder so as to separate the two drainage plates welded together by the tin solder; wherein the temperature of the low-temperature treatment is 13 ℃ or lower. This application utilizes tin when the temperature is less than 13 ℃, white tin can be cracked into powdered grey tin, make white tin take place the tin epidemic reaction, the tin soldering layer between two drainage plates that will be in the same place through the soldering material welding is transformed into breakable grey tin gradually, make the staff can part two drainage plates very easily, under the prerequisite that can in close contact with between two drainage plates not influencing, easy dismantlement and change between two drainage plates have been guaranteed, solve the technical problem that prior art's drainage plate through welded fastening is difficult to dismantle effectively.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic view of the connection of two flow guide plates welded together by tin solder according to an embodiment of the present disclosure;

fig. 2 is a schematic structural view of a drainage plate provided in an embodiment of the present application.

In the figure:

the solder mask comprises a drainage plate 1, a groove 2 and a tin solder layer 3.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

At present, two sheet-shaped drainage plates are connected and fixed by bolts in the conventional drainage plate applied to a common power transmission line, and the drainage plate has the characteristics of simple structure, small processing difficulty and low cost. Though it is all more convenient to dismantle with the installation through bolted drainage plate, but two drainage plates through bolted fixation can be because of the accumulated wind pendulum of day and month bad contact, and the drainage plate bad contact leads to the fastener to generate heat easily, influences transmission line's steady operation. In order to solve the problem of poor contact of two drainage plates, the surface that has also to guarantee two drainage plates through the welded mode now can the in close contact with, and the common means of dismantling welded article is heating and inhales welder. Although the tin soldering layers of the two drainage plates can be melted by heating, the service life of the drainage plates can be reduced by heating; the suction welding gun is generally used for quickly sucking away a small amount of soldering tin on the circuit board, and the suction welding gun is difficult to suck away the soldering tin layer between two closely connected drainage plates. It can be seen that, two welded drainage plates are difficult to dismantle by the existing common means, which is inconvenient for workers to dismantle and replace new drainage plates. Therefore, a disassembling method for conveniently separating two welded drainage plates is needed, and the two drainage plates can be disassembled and replaced on the premise of not influencing the close contact between the two drainage plates.

The application provides a method for disassembling a drainage plate, which comprises the following steps: carrying out low-temperature treatment on the two drainage plates 1 welded together by tin solder so as to separate the two drainage plates 1 welded together by the tin solder; wherein the temperature of the low-temperature treatment is 13 ℃ or lower.

This application utilizes tin when the temperature is less than 13 ℃, the white tin can be cracked into powdered grey tin, make the white tin take place the tin epidemic reaction, the tin layer 3 between two drainage plates 1 that will be in the same place through the soldering material welding gradually turns into breakable grey tin, make the staff can part two drainage plates 1 very easily, under the prerequisite that does not influence between two drainage plates 1 can in close contact with, quick detachable and change between two drainage plates 1 have been guaranteed, solve the technical problem that prior art's drainage plate 1 through welded fastening is difficult to dismantle effectively.

Further, in this example, the temperature of the low-temperature treatment was-33 ℃ or lower. When the temperature drops to-33 ℃, the speed of converting white tin into gray tin is greatly increased compared with the temperature of 13 ℃, so that the tin welding layer 3 between the two drainage plates 1 can be quickly changed into cracked powder, and the disassembly rate of workers on the two drainage plates 1 is improved.

Further, in the present embodiment, the low temperature treatment is specifically to reduce the temperature of the two flow guide plates 1 by using a solid-state cold source, a liquid-state cold source or a gaseous-state cold source. Low temperature treatment can be with two drainage plates 1 arrange in a closed container, then add solid-state cold source, liquid cold source or gaseous state cold source in toward closed container, also can directly wrap up solid-state cold source on the surface of drainage plate 1, perhaps can directly spout liquid cold source or gaseous state cold source to two drainage plates 1 again, these all can play the effect that reduces the temperature of two drainage plates 1. Of course, if the heat exchanger is arranged in the closed container, the heat exchanger needs to be replaced with a new solid cold source, a new liquid cold source or a new gaseous cold source in time along with the increase of the temperature of the closed container, so as to ensure that the temperature is maintained in a proper range.

Further, in the present embodiment, the low-temperature treatment is specifically to wrap dry ice or ice on the two drainage plates 1 by using a heat insulating material. The dry ice and the ice are common solid cold sources, the manufacturing process of the dry ice and the ice is relatively mature, the dry ice is the most preferable, and the cold storage of the dry ice is more than 1.5 times that of the water ice, so that the cooling effect of the dry ice on the drainage plate 1 under the same condition is better than that of the ice on the drainage plate 1. The heat insulating material wraps the dry ice to cover the surfaces of the two drainage plates 1, so that the heat insulating material can prevent cold generated when the dry ice is melted from being dissipated to the air, and the cold generated when the dry ice is melted can be effectively used for reducing the temperature of the drainage plates 1.

Further, in the present embodiment, the time for the low-temperature treatment is at least 30 min. In order to ensure that the tin soldering layer 3 between the two drainage plates 1 can be effectively converted into cracked powder, the two drainage plates 1 are required to be ensured to be in a low-temperature environment within sufficient time, so that a worker can disassemble the two separated drainage plates 1 subsequently.

Further, in the present embodiment, after the cryogenic treatment, the junction of the two flow guide plates 1 is washed to facilitate separation of the two flow guide plates. Specifically, the two drainage plates are washed by organic solvents, and the organic solvents comprise alcohol, acetone, diethyl ether, ethyl acetate, isopropanol turpentine, benzene and xylene. After low-temperature treatment, although the tin solder is converted into a cracked powder, the flux doped in the tin solder, such as rosin, can still adhere between the two drainage plates 1, so that a worker can conveniently disassemble and separate the two drainage plates 1, residual rosin can be sprayed and washed by alcohol, and the rosin can be dissolved in the alcohol, so that the rosin can not adhere to the two drainage plates 1.

Further, in this embodiment, a groove 2 is formed in the surface of any one of the drainage plates 1, molten tin solder is filled in the groove 2, the groove 2 is located on the butt joint surface of the other drainage plate 1, and the two drainage plates 1 are pressed together, so that the two drainage plates 1 are hermetically connected through the tin solder. The roughness of the butt joint face of the drainage plate 1 and another drainage plate 1 can be properly increased by the arrangement of the groove 2, so that the stability of the two drainage plates 1 during welding is favorably increased, and the groove 2 can serve as a filling area for redundant welding flux during welding, so that a worker can conveniently weld the two drainage plates 1 by using molten tin welding flux.

Further, in the present embodiment, the groove 2 is embodied as an annular groove. The setting of annular groove can all provide the filling region of fused tin solder for each direction of the butt joint face of drainage plate 1 for two drainage plates 1 all are connected by fused tin solder in each direction, are favorable to improving the inseparable degree between two drainage plates 1.

Further, in this embodiment, the number of the annular grooves is at least two, and all the annular grooves are concentrically arranged on the surface of any one of the drainage plates. The annular groove that sets up like this makes the butt joint face of drainage plate 1 be back the style of calligraphy, and recess 2 through returning the style of calligraphy makes drainage plate 1 contact inseparabler to through the annular groove who wraps up layer upon layer, make drainage plate 1's central part position difficult by the rainwater invasion, increase drainage plate 1 practical life, guarantee transmission line safety and stability and move.

Further, in the present embodiment, the tin solder is mainly made of 98.3 to 99.3 mass% of tin powder and 0.7 to 1.7 mass% of copper powder. Since tin is more susceptible to tin plague as the purity of tin is higher, the tin solder needs to be selected from solder with higher tin purity, and most preferably, the tin solder is mainly prepared from 99.3 mass percent of tin powder and 0.7 mass percent of copper powder.

More specifically, when the drainage plate 1 is prepared, the used solder is lead-free solder, the soldering flux is rosin, and the heating tool is a common electric soldering iron; when the drainage plate 1 is installed, lead-free solder and soldering flux are mixed according to the mass ratio of 8.5: 1.5, mixing, heating the mixture by using an electric iron, and pouring the mixture into the groove of the drainage plate 1; after the groove is filled with the mixture of the solder and the soldering flux, covering the surface of the drainage plate 1 with the groove by using another common smooth plane drainage plate 1 in a molten state, pressing and fixing for 15min by using a clamp to ensure good contact, and cooling the solder to obtain two drainage plates 1 which are tightly connected.

Example 1

The application provides an embodiment, and the embodiment provides a method for disassembling a drainage plate, which comprises the following steps: the method comprises the following steps of performing low-temperature treatment on two drainage plates 1 welded together through tin solder, then washing the joint of the two drainage plates 1 through alcohol to dissolve residual soldering flux, and finally disassembling the two drainage plates 1 welded together through the tin solder, wherein the temperature of the low-temperature treatment is 13 ℃, specifically, the two drainage plates 1 are soaked in cooling liquid stabilized at 13 ℃, so that a tin solder layer 3 between the two drainage plates 1 is gradually changed into cracked powder, and the time required by the whole process of disassembling the drainage plates 1 is 24 hours; wherein the tin solder comprises 99.3 percent of tin powder and 0.7 percent of copper powder by mass percent.

Example 2

The application provides another embodiment, and the embodiment provides another method for disassembling a drainage plate, which comprises the following steps: the method comprises the following steps of carrying out low-temperature treatment on two drainage plates 1 welded together through tin solder, then washing the joint of the two drainage plates 1 through alcohol to dissolve residual scaling powder, and finally disassembling the two drainage plates 1 welded together through the tin solder, wherein the low-temperature treatment temperature is-33 ℃, specifically, dry ice is wrapped on the two drainage plates 1 through a heat insulation material to cover the two drainage plates 1, so that a tin solder layer 3 between the two drainage plates 1 is gradually changed into cracked powder, and the time required by the whole process of disassembling the drainage plates 1 is 1 h; wherein the tin solder comprises 98.3 percent of tin powder and 1.7 percent of copper powder by mass percent.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for disassembling a drainage plate is characterized by comprising the following steps:

carrying out low-temperature treatment on the two drainage plates welded together by tin solder so as to separate the two drainage plates welded together by the tin solder;

wherein the temperature of the low-temperature treatment is 13 ℃ or lower.

2. The disassembly method of claim 1, wherein the temperature of the cryogenic treatment is-33 ℃ or less.

3. The disassembling method according to claim 1, wherein the low-temperature treatment is specifically to reduce the temperature of the two flow guide plates by using a solid-state cold source, a liquid-state cold source or a gaseous-state cold source.

4. The disassembly method according to claim 3, wherein the low-temperature treatment is implemented by wrapping dry ice or ice on the two drainage plates by a heat insulating material.

5. Disassembly method according to claim 1, wherein the cryogenic treatment is carried out for a period of at least 30 min.

6. The disassembly method of claim 1, wherein after the cryogenic treatment, the junction of the two flow guide plates is rinsed to facilitate separation of the two flow guide plates.

7. The disassembling method according to claim 1, characterized in that a groove is formed in the surface of any one of the drainage plates, molten tin solder is filled in the groove, and the two drainage plates are pressed together, so that the two drainage plates are connected in a sealing manner through the tin solder.

8. Disassembly method according to claim 7, wherein the groove is in particular an annular groove.

9. The disassembly method of claim 8, wherein the number of the annular grooves is at least two, and all the annular grooves are concentrically arranged on the surface of any one of the drainage plates.

10. Method according to any one of claims 1-9, characterised in that the tin solder is mainly made of tin powder in a mass percentage of 98.3-99.3% and copper powder in a mass percentage of 0.7-1.7%.