CN215200298U

CN215200298U - Protective device

Info

Publication number: CN215200298U
Application number: CN202121019199.4U
Authority: CN
Inventors: 张东; 张铁浩; 张贺; 张风东
Original assignee: CRRC Qingdao Sifang Co Ltd
Current assignee: CRRC Qingdao Sifang Co Ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2021-12-17
Anticipated expiration: 2031-05-13

Abstract

The utility model relates to a protector, including the medium container that is used for holding the low temperature medium, the medium container is installed on the work piece of being protected, the surface laminating of work piece is in on the surface of medium container, the wall board of medium container is made by the heat conduction material. The utility model discloses simple structure, easy dismounting can be in the welding process of work piece, and the heat input is dispersed fast owing to the temperature rise that the welding heat input produced in the quick transmission, and then reduces the influence of welding heat input to the outmost cladding material of work piece, effectively protects work piece surface coating, makes the work piece can not drop because of overheated production, explodes the problem of skin, and then can reduce the rejection rate by a wide margin and reprocess the rate, greatly practices thrift manufacturing cost, improves production quality.

Description

Protective device

Technical Field

The utility model relates to a protector, in particular to a protector that is arranged in the work progress such as welding, polishing to being protected the part and protecting.

Background

The earth terminal platform of the aluminum alloy vehicle body of the railway vehicle is generally of a three-layer structure, the innermost part is made of aluminum alloy materials, the middle part is wrapped by a layer of thin copper, and the outermost layer is plated with a layer of tin. In the process of welding the grounding terminal table, the welding heat input is large, the generated high temperature is conducted along the grounding terminal table, and the tin coating on the grounding terminal table is easy to be heated to cause the problems of falling off and skin explosion because the melting point of tin is only 231.93 ℃.

Currently, the commonly used solution is to wrap the ground terminal block with a wet towel to dissipate heat from the tin-plated portion. In the heat dissipation mode, the water stored in the wet towel is less, the interval between wrapping the wet towel and welding is longer, and the moisture stored in the wet towel is volatilized and dissipated to a certain extent, so that the heat dissipation effect cannot be better achieved. Meanwhile, the wet towel stores less water, so that the wet towel needs to be frequently replaced, the welding efficiency of the grounding terminal block is greatly influenced, and the rejection rate and the repair rate of the grounding terminal block are increased. When the tin-plated layer is damaged, the grounding terminal table needs to be replaced, so that the consumption of rework and repair operators such as welding and the like, the consumption of working hours and the consumption of tools are increased, and the manufacturing cost of vehicles is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a simple structure, and simple to operate can effectively protect work piece surface coating owing to the temperature rise that the welding heat input produced in the welding process fast transmission, and then can reduce the protector of rejection rate and repair rate by a wide margin.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a shielding device comprising a media container for holding a cryogenic medium, the media container being mounted on a workpiece to be protected, the surface of the workpiece being in contact with the outer surface of the media container, the wall of the media container being made of a thermally conductive material.

Further, the medium containers comprise two medium containers, the workpiece is arranged between the two medium containers, and the two side surfaces of the workpiece are respectively attached to the outer surfaces of the two medium containers.

Further, the two medium containers are fixedly connected together through a connecting structure.

Further, the connecting structure is baffle plates arranged on two sides of one of the medium containers, the baffle plates extend towards the other medium container, and the other medium container is clamped between the two extending baffle plates and fixed.

Furthermore, the baffle plates on the two sides and the medium container in the middle are fixedly connected through bolts, or are clamped and fixed from the two sides through puller bolts, or are fixedly connected through pins, or are fixedly connected in an inserting mode, or are fixedly connected in a clamping mode.

The medium container is characterized by further comprising a limiting baffle, wherein the limiting baffle is arranged above the workpiece, and after the medium container is installed, the limiting baffle is arranged at the top of the workpiece in a lapping mode, so that the medium container and the workpiece are vertically fixed.

Furthermore, the medium container comprises a box body, a detachable box cover arranged on the box body and a sealing ring arranged between the box body and the box cover.

Furthermore, the box cover consists of a cover plate and a handle arranged on the cover plate.

Further, the medium is water.

To sum up, compared with the prior art, the protection device of the present invention has the following advantages:

(1) the device utilizes the low temperature liquid medium of intussuseption of container and adopts the assembly mode of laminating formula, can be at the welding process of work piece, and the temperature rise of quick transmission because welding heat input produces looses the heat input fast, and then reduces the influence of welding heat input to the outermost cladding material of work piece, effectively protects work piece surface coating, makes the work piece can not drop because of overheated production, the problem of bursting skin, and then can reduce rejection rate and rework rate by a wide margin, greatly practice thrift manufacturing cost, improve production quality.

(2) The device has guaranteed the close-fitting radiating effect between work piece and the medium container when the assembly, and simple structure, simple to operate can promote the operating efficiency moreover by a wide margin.

(3) The device still can be effectively keep apart by protection work piece and construction tool at the welding process, plays better guard action, effectively prevents the unexpected physical damage that the work piece produced in welding process.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic view of the assembly structure of the protection device of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1 (with the lid removed);

FIG. 3 is a schematic structural diagram of a first medium container of the present invention;

FIG. 4 is a schematic structural diagram of a second medium container of the present invention;

fig. 5 is a schematic view of the structure of the box cover of the present invention.

As shown in fig. 1 to 5, a ground terminal block 1, a dielectric container 2, a first dielectric container 2a, a second dielectric container 2b, a box body 3, a box cover 4, a cover plate 4a, a handle 4b, a baffle plate 5, a threaded hole 6, a tightening bolt 7, and a limit baffle plate 8.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.

As shown in fig. 1 and 2, in the present embodiment, a protection device is provided for protecting a workpiece during welding, in the present embodiment, the workpiece is exemplified by a ground terminal block 1 on a rail vehicle, and the ground terminal block 1 is roughly in an L-shaped structure. The bottom of the grounding terminal block 1 is installed and welded on a vehicle body of a railway vehicle, the innermost part of the grounding terminal block 1 is made of aluminum alloy, the middle part of the grounding terminal block is wrapped with a layer of copper with the thickness less than 1mm, and the outermost layer of the grounding terminal block is plated with tin with the thickness of about 40 mu m.

The shielding device comprises a medium container 2 for containing a cryogenic medium, the walls of the medium container 2 being made of a heat conducting material, preferably a metal material, more preferably an aluminium alloy. The dielectric container 2 is fixedly attached to the outside of the ground terminal block 1 to be protected, and the dielectric container 2 is detached from the ground terminal block 1 after the construction.

After the installation, the surface laminating of ground terminal platform 1 is on medium container 2's surface, utilize the low temperature medium in medium container 2 to carry out the heat exchange with ground terminal platform 1, the temperature rise of heat input production is owing to the welding in the quick transmission, with heat input effluvium fast, and then reduce the influence of welding heat input to the outmost tin coating of ground terminal platform 1, effectively protect ground terminal platform 1 surface tin coating, make ground terminal platform 1 can not produce because of overheated and drop, the problem of skinning, and then can reduce rejection rate and repair rate by a wide margin, greatly practice thrift manufacturing cost, improve production quality.

In order to maximize the heat transfer performance, in this embodiment, preferably, two medium containers 2 are used, that is, a first medium container 2a and a second medium container 2b, respectively, a ground terminal block 1 is installed between the first medium container 2a and the second medium container 2b, both side surfaces of the ground terminal block 1 are respectively attached to the outer surfaces of the first medium container 2a and the second medium container 2b, and the ground terminal block 1 in the middle is cooled by the low-temperature medium in the first medium container 2a and the second medium container 2 b. During the welding process, the low-temperature media in the first medium container 2a and the second medium container 2b can quickly absorb heat, so that the surface temperature of the grounding terminal block 1 is reduced, and the tin plating of the grounding terminal block 1 is prevented from being melted and damaged. By adopting the fitting type assembling mode, the components can be ensured to be closely attached, a better heat dissipation effect is achieved, and meanwhile, the damage of a workpiece surface coating can be effectively avoided.

The grounding terminal block 1 is clamped between the first medium container 2a and the second medium container 2b, and the protected grounding terminal block 1 can be effectively isolated from construction tools, so that a good protection effect is achieved, accidental physical damage to the grounding terminal block 1 in the welding process is effectively prevented, the product quality of the grounding terminal block 1 is further improved, and the rejection rate is reduced.

The low-temperature medium in the medium container 2 can be selected from water, such as tap water with lower temperature, and is convenient to obtain and low in cost. Of course, the cryogenic medium is not limited to water, and other liquids may be used.

The first medium container 2a and the second medium container 2b are each composed of a case 3, a detachable case cover 4 mounted on the case 3, and a seal ring (not shown in the figure) mounted between the case 3 and the case cover 4. After cooling water is injected into the box body 3, the box cover 4 and the sealing ring play a role in sealing, and the first medium container 2a and the second medium container 2b are both closed containers.

As shown in fig. 1 and 5, the cover 4 is composed of a cover plate 4a and a handle 4b attached to the cover plate 4a for easy operation. The outer ring of the bottom surface of the cover plate 4a is provided with a circle of step structure, a circle of sealing ring is arranged at the step, and after the box cover 4 is covered on the box body 3, sealing is formed between the box cover 4 and the box body 3.

As shown in fig. 3 and 4, the main body of the box body 3 has a substantially flat structure with an open top, and when a sufficient amount of water is contained, the contact area with the ground terminal block 1 can be increased to increase the heat transfer capacity between the water and the ground terminal block 1. It is preferable that the widths of the first medium container 2a and the second medium container 2b are the same as the width of the ground terminal block 1 in order to simplify the structure and ensure efficient and rapid heat absorption due to the restriction of the construction space. By changing the size of the case 3, for example, increasing the size in the width direction or the height direction of the apparatus case 3, the apparatus can be adapted to the ground terminal block 1 of different sizes.

In order to prevent relative movement between the medium containers 2 and the ground terminal block 1 during the welding operation, in the present embodiment, the two medium containers 2 are fixedly connected together by a connecting structure.

In the present embodiment, as shown in fig. 1 and 4, the connecting structure is a baffle 5 fixed on both sides of the second medium container 2b, the baffle 5 extends forward (i.e., toward the first medium container 2 a), and the baffle 5 can be fixed on the outer surface of the second medium container 2b by welding. In this embodiment, it is preferable that the baffle 5 is formed by integrally projecting forward projections of both side walls of the second medium container 2b, and the other first medium container 2a is sandwiched and fixed between the two projecting baffles 5. The two baffle plates 5 serve to fix the first medium container 2a and also to position the middle ground terminal block 1 in the lateral direction.

The baffle plates 5 on both sides and the first medium container 2a in the middle can be fixedly connected in various ways, for example, by bolt, pin, plug, or snap. In the present embodiment, as shown in fig. 1 and 3, preferably, two screw holes 6 are respectively formed on the two baffle plates 5, a butterfly-shaped tightening bolt 7 is respectively installed in the two screw holes 6, and the first medium container 2a and the second medium container 2b are fixedly connected by clamping the middle first medium container 2a with the two tightening bolts 7 passing through the screw holes 6 on the baffle plates 5 from both sides, so that the first medium container 2a and the second medium container 2b do not slide relative to the ground terminal table 1 under the action of gravity. After the welding operation is finished, the butterfly-shaped jacking bolt 7 on the second medium container 2b is loosened, so that the device can be integrally taken down, the rapid installation and disassembly are realized, and the operation is simple and convenient.

As shown in fig. 1, a limit baffle 8 is further disposed between the two first medium containers 2a and the second medium container 2b, and the limit baffle 8 may be directly fixed to the first medium container 2a or the second medium container 2b by welding and protrudes to one side of the medium container, so that the limit baffle 8 is located right above the terminal block 1. The width of the limit baffle 8 is less than or equal to the thickness of the ground terminal block 1, that is, less than or equal to the gap between the first dielectric container 2a and the second dielectric container 2b, and the length of the limit baffle 8 may be less than or equal to the width of the box body 3. In this embodiment, the length of the limit baffle 8 is preferably equal to the width of the box body 3, the limit baffle 8 is welded on the two baffles 5 in a crossing manner, and the lower surfaces of the baffles 5 and the top of the box body 3 are on the same platform. After installation, the limiting baffle 8 is arranged at the top of the terminal block 1 in a lap mode, so that the limitation between the first medium container 2a and the second medium container 2b and the grounding terminal block 1 in the vertical direction is achieved, the stability of the terminal block 1 after insertion is guaranteed, meanwhile, the limiting baffle 8 further fixes the first medium container 2a and the second medium container 2b with the middle grounding terminal block 1, and the first medium container 2a and the second medium container 2b are further guaranteed not to slide relative to the grounding terminal block 1 under the action of gravity.

The steps of use of the device are described in detail below:

1. before welding, the second dielectric container 2b is mounted on the terminal block 1, the terminal block 1 is mounted between the two baffle plates 5, and the limit baffle plate 8 is placed on the top of the terminal block 1.

2. The first medium container 2a is placed between two baffles 5.

3. Two butterfly puller bolts 7 are inserted through the threaded holes 6 of the baffle plates 5 on both sides and are pulled tightly against the first medium container 2a in the middle.

4. Low-temperature water is added to the first medium tank 2a and the second medium tank 2 b.

5. The covers 4a of the first medium container 2a and the second medium container 2b are respectively covered on the two cases 3.

6. After welding, the two butterfly-shaped tightening bolts 7 are loosened, and the first medium container 2a is detached from the middle of the two baffle plates 5.

7. Finally, the second dielectric container 2b is removed from the terminal block 1.

The device utilizes low temperature liquid medium such as water of first medium container 2a and the interior intussuseption of second medium container 2b, and adopt this kind of laminating formula's assembly methods between work pieces such as first medium container 2a and second medium container 2b and protected terminal platform 1, guarantee to paste between each part totally, play better radiating effect, can be in the welding process of work piece, the rapid transfer is because the temperature rise that welding heat input produced, with heat input fast effluvium, and then reduce the influence of welding heat input to outermost cladding material of work piece, effectively protect work piece surface coating, make the work piece can not produce because of overheated and drop, the problem of skinning, and then can reduce rejection rate and rework rate by a wide margin, greatly practice thrift manufacturing cost, improve production quality.

In addition, the device can effectively isolate the protected workpiece from a construction tool in the welding process, has a better protection effect, and effectively prevents the workpiece from accidental physical damage in the welding process.

The working principle of the device can be widely applied to welding operation of other workpieces with similar structures with the wiring terminal block 1.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.

Claims

1. A protective device, characterized by: the low-temperature medium container comprises a medium container for containing low-temperature medium, wherein the medium container is arranged on a protected workpiece, the surface of the workpiece is attached to the outer surface of the medium container, and the wall plate of the medium container is made of heat conduction material.

2. A protective device according to claim 1, wherein: the medium container comprises two medium containers, the workpiece is arranged between the two medium containers, and the two side surfaces of the workpiece are respectively attached to the outer surfaces of the two medium containers.

3. A guard according to claim 2, characterised in that: the two medium containers are fixedly connected together through a connecting structure.

4. A guard according to claim 3, characterised in that: the connecting structure is a baffle plate arranged on two sides of one of the medium containers, the baffle plates extend towards the other medium container, and the other medium container is clamped between the two extending baffle plates and fixed.

5. A guard according to claim 4, characterised in that: the baffle plates on two sides are fixedly connected with the medium container in the middle through bolts, or are clamped and fixed from two sides through puller bolts, or are fixedly connected through pins, or are fixedly connected in an inserting mode, or are fixedly connected in a clamping mode.

6. A protective device according to claim 1, wherein: the medium container is characterized by further comprising a limiting baffle, wherein the limiting baffle is arranged above the workpiece, and after the medium container is installed, the limiting baffle is arranged at the top of the workpiece in a lapping mode, so that the medium container and the workpiece are vertically fixed.

7. A protective device according to claim 1, wherein: the medium container consists of a box body, a detachable box cover arranged on the box body and a sealing ring arranged between the box body and the box cover.

8. A guard according to claim 7, characterised in that: the box cover consists of a cover plate and a handle arranged on the cover plate.

9. A guard according to any one of claims 1 to 8, characterised in that: the medium is water.