CN107552946B - Universal die for thermite welding of grounding grid - Google Patents
Universal die for thermite welding of grounding grid Download PDFInfo
- Publication number
- CN107552946B CN107552946B CN201711009458.3A CN201711009458A CN107552946B CN 107552946 B CN107552946 B CN 107552946B CN 201711009458 A CN201711009458 A CN 201711009458A CN 107552946 B CN107552946 B CN 107552946B
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- welding
- die
- reaction chamber
- ignition
- ignition port
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- 238000003466 welding Methods 0.000 title claims abstract description 75
- 239000003832 thermite Substances 0.000 title claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 21
- 239000000779 smoke Substances 0.000 claims abstract description 18
- 239000004020 conductor Substances 0.000 claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 239000000428 dust Substances 0.000 abstract description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 230000004927 fusion Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- 239000005751 Copper oxide Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910000431 copper oxide Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention discloses a universal die for thermite welding of a grounding grid, which comprises a die body, wherein a reaction chamber, a drainage groove and a welding cavity are formed in the die body from top to bottom, the bottom of the reaction chamber is connected with the drainage groove, a gasket, thermite welding powder and igniting powder can be placed in the reaction chamber, the welding cavity is horizontally positioned at the bottom of the drainage groove, fixed placing cavities communicated with the welding cavity are respectively arranged on two horizontal sides of the outer surface of the die body, detachable modules are arranged in the fixed placing cavities, the diameter of each module is the same as the inner diameter of the fixed placing cavity, inner holes through which welding conductors can pass are penetrated are formed in the end face of each module, and an ignition port and a cover body are arranged on the die body to be matched for use, so that smoke dust generated by inhalation and combustion when workers ignite is reduced.
Description
Technical Field
The invention relates to thermite welding, in particular to a universal die for grounding grid thermite welding.
Background
The grounding device can introduce leakage current, static charge, lightning current and the like possibly generated on electrical equipment and other production equipment into the ground, so that personal electric shock and accidents such as fire disaster and explosion possibly occurring are avoided, and the grounding device is an electricity safety measure adopted for ensuring the normal work and personal safety of the electrical equipment. With the development of the power system, the requirements on grounding devices are more and more strict, and the long-term, reliable and safe grounding system is a fundamental guarantee for maintaining the stable operation of the power system and guaranteeing the safety of operators and electrical equipment. The key of ensuring the long-term safe and reliable operation of the grounding system is that the grounding material with good quality is connected with the grounding system reliably;
at present, the grounding grid is connected by using a gas welding or arc welding process generally, but the safety requirement of the welding process is higher (for example, oxygen and acetylene cannot be transported by a vehicle, the site is required to be placed at a distance of more than 5m, the arc welding is required to prevent accidents such as eye burning, electric shock, fire and the like), welding personnel must hold special operation evidences, and a workplace must conform to a certain safety technology. Particularly, in the welding process of grounding networks such as power transmission substations, power transmission towers and the like, the construction site is often difficult to realize no electricity, complex terrain, inconvenient transportation and the like, and the construction difficulty of gas welding or arc welding is increased sharply. Thermite welding is a modern welding process of welding joints by utilizing chemical reaction of aluminum and copper oxide, reducing copper oxide by utilizing high-temperature aluminum with stronger activity in a high-temperature resistant graphite mold, generating an ultrahigh-temperature molten copper conductor in the mold, and passing through a mold cavity with a certain shape and size. The welding can be implemented by only using the welding flux, the ignition device and the die, a large number of auxiliary welding equipment is not needed, and the welding is fast and convenient to implement in a field environment, and is praised as an optimal connection mode of the grounding device;
although thermite welding can weld joints such as stranded wires, stranded steel plates, stranded wires, steel pipes, steel plates and the like, the principle determines that the joints with different specifications and different sizes need special dies. In particular, when the outdoor construction is performed, a plurality of special dies are needed to be connected with the connectors according to different specifications and different sizes, the hardness of the graphite dies is low, the transportation and the inconvenience are caused, and the graphite dies which are required to bear high temperature and hot air flow are high in price, so that the popularization and the application of heat release welding on the grounding grid are limited.
Disclosure of Invention
In order to solve the problem that special dies are needed for thermite welding of different joints, the invention provides a universal die for thermite welding of a grounding grid, which can be used for thermite welding of joints with the same specification and different dimensions, improves the transportation convenience, reduces the cost and is suitable for form welding of stranded wires, stranded steel plates, steel plates and the like.
The invention is realized by the following technical scheme:
a general mould for ground net thermite welding, general mould includes the mould body, from last down set up into reaction chamber, drainage groove, butt fusion chamber respectively in the mould body, reaction chamber's bottom is connected with the drainage groove, gasket, thermite welding powder, ignition powder have been placed in the reaction chamber, butt fusion chamber level is located the bottom of drainage groove, and the surface level both sides of mould body are provided with the fixed chamber of placing that feeds through the butt fusion chamber respectively, the fixed intracavity of placing all is provided with detachable module, the diameter of module is the same with the internal diameter of fixed chamber of placing, run through on the terminal surface of module has the hole that can supply and demand welded conductor to pass.
Preferably, the die body is provided with the ignition mouth near top one side, the ignition mouth is through spilling the slope pipeline and the reaction chamber intercommunication that have the powder of igniting in advance, the opposite one side of ignition mouth articulates on the top of die body has the lid, the lid on lie in one side of ignition mouth top and have the sunshade that is used for sheltering from the ignition mouth through spout sliding connection.
Preferably, a fire baffle plate is detachably arranged on the side wall, above the tail end of the inclined pipeline, of the reaction chamber, and a gap is reserved between one end, away from the ignition port, of the fire baffle plate and the reaction chamber to form a smoke exhaust channel.
Preferably, the cover body is provided with a smoke outlet, and the smoke outlet is positioned on one side of the cover body far away from the ignition port.
Preferably, the bottom end of the shielding plate is connected with a bulge matched with the ignition port.
Preferably, a handle is arranged on the shielding plate.
Preferably, the module is made of graphite.
Preferably, the reaction chamber has a structure with a wide upper part and a narrow lower part.
Aiming at the problem that special dies are needed for thermite welding of different joints, the beneficial effects of the invention mainly comprise the following aspects:
(1) The fixed placing cavities communicated with the welding cavities are respectively arranged on two horizontal sides of the outer surface of the die body, the detachable modules are arranged in the fixed placing cavities, the diameter of each module is the same as the inner diameter of the fixed placing cavity, the inner holes through which welding conductors can pass are penetrated on the end surfaces of the modules, when the die is used in field construction, the welding conductors with different sizes and the same specification (round shape and square shape) can be realized by only adding one die with the modules with different inner hole diameters, the welding conductors with different sizes and the same specification can be welded by one die, the transportation convenience is improved, the die manufacturing cost can be saved, and although the welding of a large die (a large die for a large-size joint) for a small-size joint needs to consume more welding powder, the aluminum thermal welding connection cost of a grounding grid can be greatly reduced compared with the high cost and the transportation convenience of the die;
(2) The invention relates to a method for igniting aluminum thermal welding, which comprises the steps of bending an ignition strip, placing the ignition strip on aluminum thermal welding powder of a reaction chamber, covering a die cover body, and enabling one end of the ignition strip to leak out of the die cover body to facilitate ignition, wherein in the use process, the ignition strip is sometimes easy to be broken by the cover body to affect ignition efficiency;
(3) According to the invention, the fire baffle plate is detachably arranged on the side wall, which is positioned above the tail end of the inclined pipeline, in the reaction chamber, a gap is reserved between one end, which is far away from the ignition port, of the fire baffle plate and the reaction chamber to form a smoke exhaust channel, the reaction chamber is internally combusted more fully through the arrangement of the fire baffle plate, the ignition port is blocked by the instant shielding plate after ignition, and meanwhile, the combusted smoke dust is discharged from the smoke exhaust channel which is far away from the ignition port and the smoke exhaust port on the cover body, so that the smoke dust generated by inhalation combustion is reduced when a worker positioned nearer to the ignition port ignites.
Drawings
FIG. 1 is a schematic overall cross-sectional view of a mold of the present invention;
FIG. 2 is a schematic diagram of the structure of the module of the present invention;
FIG. 3 is a schematic view of the structure of the cover of the present invention;
reference numerals: 1. the die comprises a die body, 2, a reaction chamber, 3, a drainage groove, 4, a welding cavity, 5, a bulge, 6, a fixed placing cavity, 7, a module, 8, an inner hole, 9, a fire baffle plate, 10, an ignition port, 11, an inclined pipeline, 12, a cover body, 13, a shielding plate, 14 and a chute.
Detailed Description
The invention is further illustrated by the following examples:
example 1
The utility model provides a general mould for ground net thermite welding, general mould includes mould body 1, set up respectively as reaction chamber 2, drainage groove 3, welding chamber 4 from top to bottom in the mould body 1, reaction chamber 2 is wide in the bottom of reaction chamber 2 and is narrow in the bottom, be connected with drainage groove 3, place the gasket between reaction chamber 2 and the drainage groove 3, can place thermite welding powder, the powder of igniting in the top of gasket, the gasket can be the aluminium gasket, welding chamber 4 level is located the bottom of drainage groove 3, the surface level both sides of mould body 1 are provided with the fixed chamber 6 of placing that feeds through welding chamber 4 respectively, all be provided with detachable module 7 in the fixed chamber of placing 6, module 7 is graphite material, the diameter of module 7 is the same with the internal diameter of fixed chamber of placing 6, run through on the terminal surface of module 7 has the hole 8 that can supply the welding conductor to pass, module 7 can be replaced for the welding conductor that has different sizes of different specifications;
the die body 1 is close to top one side and is provided with the ignition mouth 10, the ignition mouth 10 is through scattering the inclined pipeline 11 and the reaction chamber 2 intercommunication that have the powder of igniting in advance, one side opposite with the ignition mouth 10 on the top of die body 1 articulates there is lid 12, one side that lies in the ignition mouth 10 top on the lid 12 be used for sheltering from the sunshade 13 of ignition mouth 10 through spout 14 sliding connection, the bottom of sunshade 13 is connected with ignition mouth 10 assorted arch 5, and is equipped with the handle on the sunshade 13, the reaction chamber 2 in lie in the inclined pipeline 11 terminal side on can dismantle and be provided with flame baffle 9, flame baffle 9 keep away from the one end of mouth 10 and reaction chamber 2 and leave the clearance and form the smoke vent, be equipped with the exhaust port on the lid 12, the smoke vent is located on the lid 12 and keeps away from ignition mouth one side.
The working process comprises the following steps:
the universal die is assembled by a left part and a right part, screws penetrate through screw holes on the die body 1 to be assembled, the die body 1 and conductors to be welded are dehumidified before thermite welding, drying is guaranteed, protective articles such as gloves and goggles are put on, and a module with corresponding inner hole diameter is selected according to the inner diameter of the conductors to be welded, for example: welding a phi 20 mm-phi 20mm steel strand straight joint, selecting two modules with inner hole aperture of phi 20mm, placing the two modules into a fixed placing cavity 6 of a die body, penetrating the steel strand joint of phi 20mm through the inner hole of the module 7, assembling the steel strand joint with the module 7, ensuring that the part to be welded is positioned at the center of a welding cavity 4, placing a gasket at the bottom of a reaction cavity 2, placing thermite welding powder and ignition powder into the welding cavity 4 after the gasket prevents the thermite welding powder, the ignition powder and the like before reaction from entering the welding cavity 4 through an ignition groove 3, then scattering some ignition powder on an inclined pipeline 11 in advance, covering a cover body 12, sliding a shielding plate 13 onto the cover body 12 when ignition is needed, placing an ignition gun at an ignition port 10, reacting with the thermite welding powder and the ignition powder in the reaction cavity 2 through igniting the ignition powder on the inclined pipeline 11, generating high temperature to melt the gasket, entering the welding cavity 4 through the ignition groove 3 to weld a conductor to be welded, the reaction chamber 2 is internally burnt more fully through the arrangement of the fire baffle 9, the instantaneously shielding plate 13 after ignition slides down from the cover body 12 to block the ignition port, meanwhile, the burnt smoke dust is discharged from a smoke discharging channel far away from the ignition port 10 and the smoke discharging port on the cover body 12, so that the smoke dust generated by the sucked combustion is reduced when a worker positioned near the ignition port 10 ignites, after the reaction is finished for 2 to 3 minutes, a die is opened after the reaction is finished, a welded joint is taken out, the welding of the steel strand in-line joint with phi 20 mm-phi 20mm is completed, the die is made of graphite and is a disposable product, the die can be broken and taken down after the welding, the die can be left on the joint of a welding conductor without influencing the conductivity of the joint, so that slag in the die is removed for the next use, when the welding of conductors with other sizes is required, the die matched with the conductors to be welded is only required to be replaced, the method can be used for welding conductors to be welded with the same specification and different sizes by repeating the above operation, improves the transportation convenience, and can also save the manufacturing cost of the die.
While the basic principles, principal features and advantages of the present invention have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described in the foregoing description merely illustrate the principles of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (5)
1. A universal die for thermite welding of a ground grid, characterized by: the universal die comprises a die body (1), wherein the die body (1) is internally provided with a reaction chamber (2), a drainage groove (3) and a welding cavity (4) from top to bottom respectively, the bottom of the reaction chamber (2) is connected with the drainage groove (3), a gasket, thermite welding powder and ignition powder are placed in the reaction chamber (2), the welding cavity (4) is horizontally positioned at the bottom of the drainage groove (3), fixed placing cavities (6) communicated with the welding cavity (4) are respectively arranged on two horizontal sides of the outer surface of the die body (1), detachable modules (7) are respectively arranged in the fixed placing cavities (6), the diameter of each module (7) is the same as the inner diameter of the fixed placing cavity (6), and an inner hole (8) through which a welding conductor can pass is penetrated on the end face of each module (7);
the die comprises a die body (1), wherein an ignition port (10) is formed in one side, close to the top, of the die body (1), the ignition port (10) is communicated with a reaction chamber (2) through an inclined pipeline (11) with ignition powder scattered in advance, a cover body (12) is hinged to one side, opposite to the ignition port (10), of the top end of the die body (1), a smoke outlet is formed in the cover body (12), the smoke outlet is formed in one side, far away from the ignition port, of the cover body, and a shielding plate (13) for shielding the ignition port (10) is connected to one side, located above the ignition port (10), of the cover body (12) in a sliding mode through a sliding groove (14);
the side wall of the reaction chamber (2) above the tail end of the inclined pipeline (11) is detachably provided with a fire baffle plate (9), and one end of the fire baffle plate (9) away from the ignition port (10) and the reaction chamber (2) leave a gap to form a smoke exhaust channel.
2. A universal die for thermite welding of a ground network as set forth in claim 1, wherein: the bottom end of the shielding plate (13) is connected with a bulge (5) matched with the ignition port (10).
3. A universal die for thermite welding of a ground network as set forth in claim 1, wherein: the shielding plate (13) is provided with a handle.
4. A universal die for thermite welding of a ground network as set forth in claim 1, wherein: the module (7) is made of graphite.
5. A universal die for thermite welding of a ground network as set forth in claim 1, wherein: the reaction chamber (2) has a structure with a wide upper part and a narrow lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711009458.3A CN107552946B (en) | 2017-10-25 | 2017-10-25 | Universal die for thermite welding of grounding grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711009458.3A CN107552946B (en) | 2017-10-25 | 2017-10-25 | Universal die for thermite welding of grounding grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107552946A CN107552946A (en) | 2018-01-09 |
| CN107552946B true CN107552946B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711009458.3A Active CN107552946B (en) | 2017-10-25 | 2017-10-25 | Universal die for thermite welding of grounding grid |
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| CN108465930B (en) * | 2018-04-16 | 2021-07-09 | 深圳市沃尔核材股份有限公司 | Method for connecting two connecting pipes |
| CN112548456A (en) * | 2020-12-09 | 2021-03-26 | 中国南方电网有限责任公司超高压输电公司柳州局 | Hot melt welding mould |
| CN116727950B (en) * | 2023-08-09 | 2023-10-13 | 宝牌电缆实业有限公司 | Cable conductor connects welding equipment |
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| CN107552946A (en) | 2018-01-09 |
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