CN219379312U

CN219379312U - Active heat dissipation slag prevention device for flash butt welding motorized clamp

Info

Publication number: CN219379312U
Application number: CN202320292687.5U
Authority: CN
Inventors: 翁海波; 高佳贺; 朱申奥; 董诗慧; 苏世杰; 张建
Original assignee: Jiangsu University of Science and Technology
Current assignee: Jiangsu University of Science and Technology
Priority date: 2023-02-23
Filing date: 2023-02-23
Publication date: 2023-07-21
Anticipated expiration: 2033-02-23

Abstract

The utility model discloses an active heat dissipation slag prevention device for a movable clamp of flash butt welding, which comprises a table top and a movable clamp bottom plate, wherein an electrode copper table is arranged on the movable clamp bottom plate, and an electrode is arranged on the electrode copper table; the bottom of the electrode copper table is provided with an air inlet and an air outlet, and a first air inlet pipeline and a first air outlet pipeline are arranged in the electrode copper table; the pipelines in the electrode comprise a frame-type shunt pipeline, a second air inlet pipeline and a second air outlet pipeline; the movable clamp bottom plate, the dustproof shield and the thrust plate form a cavity; a cooling gun connected with a compressed air source is arranged in the cavity; cold air enters the electrode copper table through the first air inlet pipeline, then enters the electrode through the second air inlet pipeline, flows out of the electrode through the second air outlet pipeline after being split through the frame-type split pipeline and enters the first air outlet pipeline, enters the cavity through the air outlet of the electrode copper table, positive pressure is formed, and solidified metal liquid drops and other impurities after welding work are blown away. The utility model realizes the dual functions of heat dissipation, slag prevention and dust prevention, and has simple and compact structure, safety and reliability.

Description

Active heat dissipation slag prevention device for flash butt welding motorized clamp

Technical Field

The utility model relates to cooling equipment, in particular to an active heat dissipation slag prevention device for a flash butt welding motorized clamp.

Background

The flash butt welding process includes heating, flashing, upsetting and other stages. During welding, paired weldments are pressed on the conductive electrodes through the clamp pressing blocks, the end faces of the weldments on two sides are contacted and generate resistance heat after the electrodes are electrified, the contact points of the end faces of the weldments are heated and then melted, a flashing phenomenon is generated, and upsetting force is applied after the preset flashing length is reached, so that the end faces of the weldments on two sides are crystallized and formed at high temperature. The flash butt welding process can generate a large amount of resistance heat, so that the temperature of the electrode and the adjacent mechanical structure is quickly increased, and the working efficiency of the welding machine can be greatly influenced if the natural heat dissipation is only relied on. In addition, a large amount of tiny metal droplets can be sprayed from a weld neck in the flashing stage of flash butt welding, and in order to avoid the damage of welding moving parts caused by tiny metal particles formed after the droplets are cooled and solidified, a slag prevention device is required to be added to the moving parts of the flash butt welding machine.

In order to reduce the influence of heat and high temperature on a working position, patent 202221539712.7 discloses a cooling water backwater device of an anchor chain flash welding machine, which is characterized in that a plurality of backwater hoses are arranged on parts needing to be radiated of the welding machine to collect backwater water to a cooling water tank, and a closed circulation backwater mode is adopted for cooling, so that the cooling effect of each part of the welding machine is improved. However, the backwater cooling device has a complex structure and high cost; meanwhile, accidents such as short circuit and the like are easily caused by water leakage of the water pipe, and potential safety hazards exist.

In order to prevent the influence of welding slag on moving parts, patent 201920718612.2 discloses a slag-sticking prevention structure of a main clamp of a flash welding machine in a cold rolling mill, which adopts a slag-sticking prevention plate made of materials which are good in conductive effect and different from steel plates and are not easy to adhere and splash, and then the slag-sticking prevention plate is compounded on the surface of the clamp of the original flash welding machine, so that slag sticking can be effectively prevented. The slag-preventing plate comprises five layers of special structures, and is complex in processing technology and high in cost.

Disclosure of Invention

The utility model aims to: the utility model aims to provide an active heat dissipation slag prevention device for flash butt welding of a motorized fixture and capable of realizing rapid cooling of local parts and slag prevention of moving parts.

The technical scheme is as follows: the utility model relates to an active heat dissipation slag prevention device for a movable clamp for flash butt welding, which comprises a table top and a movable clamp bottom plate arranged on the table top in a sliding manner, wherein an electrode copper table is arranged on one side, close to a working surface, of the movable clamp bottom plate, and an electrode is arranged on the electrode copper table; the bottom of the electrode copper table is provided with an air inlet and an air outlet, and a first air inlet pipeline and a first air outlet pipeline are arranged in the electrode copper table; the pipelines in the electrode comprise a frame-type shunt pipeline which is horizontally arranged, a second air inlet pipeline and a second air outlet pipeline which are vertically arranged; the U-shaped dustproof shield is fixed on the lower surface of the movable clamp bottom plate, and the cavity is formed by the dustproof shield, the movable clamp bottom plate and the thrust plate fixed on one side of the movable clamp bottom plate in the moving direction; a cooling gun connected with a compressed air source is arranged in the cavity and is connected with an air inlet through an air guide hose; the cold air is led into the first air inlet pipeline from the air inlet and enters the electrode copper table, then enters the electrode from the second air inlet pipeline, is split to the electrode through the frame-type split pipeline to be cooled everywhere, is converged to the second air outlet pipeline, and the outflow electrode enters the first air outlet pipeline and flows out through the air outlet of the electrode copper table and enters the cavity to form a positive pressure working environment.

Preferably, the sum of the cross sectional areas of the frame-shaped diversion pipelines is equal to the cross sectional area of the second air inlet pipeline, and the cross sectional area of the second air inlet pipeline is the same as the cross sectional area of the second air outlet pipeline, so that the balance of gas flow is maintained.

Preferably, the electrode is an L-shaped electrode made of chromium, zirconium and copper, and is fixed in an electrode groove on the upper surface of the electrode copper table, and a conical groove is arranged at the interface of the second air inlet pipeline and the second air outlet pipeline and the electrode copper table.

Preferably, the electrode copper table is made of L-shaped red copper, the air inlet is provided with threads, and the first air inlet pipeline outlet and the first air outlet pipeline inlet are provided with conical boss interfaces.

Preferably, the U-shaped dustproof protection cover is provided with a heat dissipation round hole at the hot gas outlet corresponding to the cooling gun.

Preferably, dustproof protection coils are arranged in the through holes or grooves on the table top and the movable clamp bottom plate.

Preferably, the table top is provided with a guide rail and a sliding block, and the movable clamp bottom plate is fixedly connected with the sliding block to realize sliding connection with the table top.

Preferably, both ends of the air guide hose are provided with pneumatic quick connectors.

The beneficial effects are that: compared with the prior art, the utility model has the following advantages: 1. the device combines the local heat radiation requirement of the movable electrode mechanism with the guide rail dustproof measure, realizes the dual functions of heat radiation and slag and dust prevention, and has a simple and compact structure; 2. the pressure of the closed space at the bottom of the bottom plate of the movable clamp is increased by the reflowed cold air to form a positive pressure environment, and the pressure difference generated by the pressure difference and the outside can blow away the welding slag and dust impurities of the metal liquid drops, so that the protection effect is enhanced, the dust-free working environment of the guide rail is realized, the damage or the blocking of moving parts is prevented, and the working stability and the service life of the device are improved; 3. the device has simple structure, safety and reliability, and eliminates the short circuit risk caused by water leakage of the water cooling device.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a top view of a mesa;

FIG. 3 is a schematic view of the structure within the cavity;

FIG. 4 is a diagram of a gas line within an electrode copper station;

FIG. 5 is a bottom view of the electrode copper table;

fig. 6 is a diagram of a gas circuit in an electrode.

Description of the embodiments

The technical scheme of the utility model is further described below with reference to the accompanying drawings.

The utility model relates to an active heat dissipation slag prevention device for a flash butt welding motorized clamp, which comprises a table top 1 and a movable clamp bottom plate 4, wherein a guide rail 2 and a sliding block 3 are arranged on the table top 1, and the movable clamp bottom plate 4 is fixedly connected with the sliding block to realize sliding connection with the table top 1. The guide rail 2 is in a linear type and is fixed in a guide rail groove on the right side of the table top through a screw. The sliding block is flange-shaped and is arranged on the guide rail. The left side of the table top 1 is provided with a first straight notch, the centers of the two guide rails are provided with a second straight notch, and a first dustproof protection coil 11 and a second dustproof protection coil 12 are respectively installed in the first straight notch and the second straight notch.

The lower surface of the movable clamp bottom plate 4 is fixedly provided with a U-shaped dustproof shield 6, the movable clamp bottom plate 4 and a thrust plate 5 fixed on one side of the movable clamp bottom plate 4 in the moving direction form a cavity, and the center of the left side surface of the U-shaped dustproof shield is provided with a heat dissipation round hole. A cooling gun 7 connected with a compressed air source is arranged in the cavity, and the cooling gun 7 is fixed on the lower surface of the movable clamp base plate 4 through a base 71. The cooling gun 7 comprises a hot air outlet 76, a compressed air source air inlet 72 and a cold air outlet 73, the cold air outlet 73 is connected with an air inlet 821 of the electrode copper table 8 through an air guide hose 75, the hot air outlet 76 is positioned at the center of the gun body of the cooling gun 7, the hot air outlet is opposite to the heat dissipation round hole of the U-shaped dustproof protection cover, and the air inlet 821 is connected with a compressed air source (not shown in the figure); the cool air outlet 73 is opposite to the compressed air source air inlet 72. The air guide hoses 75 are each provided with a pneumatic quick connector 74.

The movable clamp base plate 4 is cuboid, an electrode copper table groove is formed in one side, close to the working face, of the right side edge of the upper surface of the movable clamp base plate, a through line round hole is formed in the left side of the movable clamp base plate, and a round dustproof protection coil 41 is installed in the through line round hole. The center of the movable clamp bottom plate is provided with a plurality of bolt through holes. An electrode copper table 8 and an electrode 9 fixed in the electrode copper table 8 are arranged in the electrode copper table groove on the movable clamp bottom plate 4, the electrode copper table 8 is L-shaped and is made of red copper, and the electrode 9 is L-shaped and is made of chromium zirconium copper.

The pipelines in the electrode 9 comprise a frame-shaped shunt pipeline 912 which is arranged horizontally, and a second air inlet pipeline 911 and a second air outlet pipeline 913 which are arranged vertically. The sum of the cross-sectional areas of the frame-shaped shunt tubes 912 is equal to the cross-sectional area of the second inlet tube 911, and the cross-sectional area of the second inlet tube 911 is the same as the cross-sectional area of the second outlet tube 913. Conical grooves are formed at the inlet of the second air inlet pipeline 911 and the outlet of the second air outlet pipeline 913.

The bottom of the electrode copper table 8 is provided with an air inlet 821 and an air outlet 822, a first air inlet pipeline 823 and a first air outlet pipeline 824 are arranged in the electrode copper table 8, and the first air inlet pipeline 823 is communicated with the air inlet 821 and conveys cold air to flow into the electrode 9; the first air outlet pipeline 824 is communicated with the air outlet 822, and cold air flowing out of the electrode 9 is output. The air inlet 821 is threaded, and the outlet of the first air inlet pipeline 823 and the inlet of the first air outlet pipeline 824 are provided with conical boss interfaces.

The electrode 9 is installed in the electrode groove of the electrode copper platform 8, the boss interface of the electrode copper platform 8 is matched with the conical groove of the electrode 9 in a sealing way, and after the electrode 9 is installed in place, the second air inlet pipeline 911 and the second air outlet pipeline 913 of the electrode 9 are aligned with the first air inlet pipeline 823 and the first air outlet pipeline 824 of the electrode copper platform 8 respectively.

The first sealing plug 91 and the second sealing plug 92 are respectively embedded and installed on the electrode copper table and the inner pipeline processing end face of the electrode. The first sealing plug and the second sealing plug are made of stainless steel, and the first sealing plug is slightly larger than the second sealing plug.

Cool air is introduced into the first air inlet pipeline 823 from the air inlet 821 and enters the electrode copper platform 8, then enters the electrode 9 from the second air inlet pipeline 911, is split to the electrode through the frame-type split pipeline 912 to be cooled, is converged to the second air outlet pipeline 913, flows out of the electrode 9 and enters the first air outlet pipeline 824, flows out through the air outlet 822 of the electrode copper platform 8 and enters the cavity, and a positive pressure working environment is formed.

The operation process of the utility model is as follows:

before flash welding, parts at all parts are installed. During welding, the bar is pressed on the notch of the electrode, the bar is heated under the action of current and then melted, and the temperature of the electrode is gradually increased. Opening a compressed air source, enabling compressed air to enter the cooling gun 7 through the compressed air source air inlet 72, enabling cool air to be discharged into the air guide hose 75 through the cool air outlet 73, and enabling hot air to be discharged through the heat dissipation round holes of the U-shaped dustproof protection cover 6; the cold air in the air guide hose 75 flows into the first air inlet line 823 in the electrode copper stage, and enters the second air inlet line 911 in the electrode 9 through the boss joint. The cool air in the second air inlet pipeline 911 is split to the electrode parts through the frame-shaped split pipeline 912, is subjected to heat dissipation and cooling, then is converged into the second air outlet pipeline 913, and is discharged out of the electrode 9 through the boss interface. The exhausted gas flows into a first gas outlet pipeline 824 of the electrode copper platform and is exhausted from the electrode copper platform 8 through a gas outlet 822; the flowing cold air enters the sealed space below the movable clamp bottom plate 4 to form a positive pressure working environment, and the solidified metal liquid drops and other impurities after the welding work are blown away, so that the guide rail is ensured to work stably. And after the welding work is finished, the movable clamp moves, the welding piece is taken down, and the cooling device can continuously cool and dissipate heat.

Claims

1. The active heat dissipation slag prevention device for the flash butt welding movable clamp comprises a table top (1) and a movable clamp bottom plate (4) arranged on the table top (1) in a sliding manner, and is characterized in that an electrode copper table (8) is arranged on one side, close to a working surface, of the movable clamp bottom plate (4), and an electrode (9) is arranged on the electrode copper table (8); an air inlet (821) and an air outlet (822) are formed in the bottom of the electrode copper table (8), and a first air inlet pipeline (823) and a first air outlet pipeline (824) are arranged in the electrode copper table (8); the pipelines in the electrode (9) comprise a frame-type shunt pipeline (912) which is horizontally arranged, a second air inlet pipeline (911) and a second air outlet pipeline (913) which are vertically arranged; the U-shaped dustproof shield (6) is fixed on the lower surface of the movable clamp base plate (4), and a cavity is formed by the U-shaped dustproof shield (6), the movable clamp base plate (4) and a thrust plate (5) fixed on one side of the movable clamp base plate (4) in the moving direction; a cooling gun (7) connected with a compressed air source is arranged in the cavity and is connected with an air inlet (821) through an air guide hose (75); the cold air is introduced into the first air inlet pipeline (823) through the air inlet (821) and enters the electrode copper table (8), then enters the electrode (9) through the second air inlet pipeline (911), is shunted to the electrode through the frame-type shunt pipeline (912) to cool all the positions, is converged to the second air outlet pipeline (913), flows out of the electrode (9) and enters the first air outlet pipeline (824), flows out through the air outlet (822) of the electrode copper table (8), and enters the cavity to form a positive pressure working environment.

2. The active heat dissipation slag prevention device for a flash butt welding motorized fixture as recited in claim 1, wherein the sum of the cross-sectional areas of the frame-shaped shunt tubes (912) is equal to the cross-sectional area of the second air inlet tube (911), the second air inlet tube (911) being the same as the cross-sectional area of the second air outlet tube (913).

3. The active heat dissipation slag prevention device for the flash butt welding motorized fixture according to claim 1, wherein the electrode (9) is an electrode (9) made of L-shaped chromium zirconium copper, the electrode is fixed in an electrode groove on the upper surface of the electrode copper table (8), and a conical groove is formed at an interface between the second air inlet pipeline (911) and the second air outlet pipeline (913) and the electrode copper table (8).

4. The active heat dissipation slag prevention device for a flash butt welding motorized fixture according to claim 1, wherein the electrode copper table (8) is an electrode copper table (8) made of L-shaped red copper, the air inlet (821) is provided with threads, and the outlets of the first air inlet pipeline (823) and the inlets of the first air outlet pipeline (824) are provided with conical boss interfaces.

5. The active heat dissipation slag prevention device for a flash butt welding motorized fixture according to claim 1, wherein the U-shaped dust guard (6) is provided with heat dissipation round holes at positions corresponding to hot gas outlets (76) of the cooling guns (7).

6. The active heat dissipation and slag prevention device for a flash butt welding motorized fixture of claim 1, wherein the dust protection coil is installed in the through holes or slots on the table top and the bottom plate of the motorized fixture.

7. The active heat dissipation slag prevention device for the flash butt welding motorized clamp according to claim 1, wherein a guide rail (2) and a sliding block (3) are arranged on the table top (1), and the movable clamp bottom plate (4) is fixedly connected with the sliding block to realize sliding connection with the table top (1).

8. Active heat dissipation and slag prevention device for a flash butt welding motorized fixture according to claim 1, characterized in that both ends of the air guiding hose (75) are equipped with pneumatic quick connectors (74).