CN210254654U - Anti-scalding device for welding tongs - Google Patents

Abstract

The utility model discloses a welding tongs anti-scalding device, which comprises a fusing connection box and an anti-scalding body arranged in the fusing connection box, and is characterized in that the anti-scalding body comprises a through core shell with a containing space, two ends of a through core hole of the shell are respectively provided with an outlet connecting terminal and an inlet connecting terminal, and a sodium fuse is arranged between the outlet connecting terminal and the inlet connecting terminal; a beryllium oxide porcelain tube is arranged outside one end of the sodium fuse, which faces out of the wiring terminal; and a mica glass layer is arranged in the shell and positioned outside the wiring terminal and the beryllium oxide porcelain tube. The sodium melt is instantly in a high resistance state at high temperature, so that the current is limited to pass through; when the fault disappears, the temperature drops, and the sodium melt automatically recovers the original low-resistance conduction state; the device has the advantages of obvious current limiting effect, short action time, no need of replacing melt after action, repeated use, automatic reclosing and the like.

Description

Anti-scalding device for welding tongs

Technical Field

The utility model relates to an electric welding tool technique, especially a soldering turret prevents scalding device.

Background

The electrode holder is the main tool for welding rod arc welding, and its main function is to hold the welding rod and conduct current, which is greatly related to the labor condition and life safety of welder. The electrode holders must have good insulating property and heat insulation capability, but the electrode holders in practical use have a lot of hidden dangers when being scalded, and the following problems can be caused: the insulating part loses the insulating property, and electric shock accidents are caused; fire and scald accidents are easy to cause; the using liability of the welding tongs is reduced; the welding energy is lost, and the welding current is reduced. The reason for the welding tongs to be scalded is various, but the welding tongs are scalded mainly due to the fact that the welding steel plate is conducted to the welding tongs due to overhigh temperature, contact resistance is large, the welding tongs are scalded along with the lengthening of welding time, and if the phenomenon cannot be found manually in time, hidden dangers are large.

The anti-scalding treatment of the electric welding tongs in the disclosed technology is basically realized by modifying parts from a welding tongs body, such as CN207787940U, the anti-scalding electric welding tongs is characterized in that a first tong mouth, a second tong mouth, a handle, an elastic buffer device, a handle and a cable connecting cylinder arranged in the handle are utilized, the first tong mouth is connected with the handle, the second tong mouth is connected with the handle, the first tong mouth and the second tong mouth are connected through a pin, the elastic buffer device is arranged between the handle and the cable connecting cylinder to form a main body structure of the electric welding tongs, a wavy plate body is arranged in the cable connecting cylinder, a jackscrew penetrates through the pipe wall of the cable connecting cylinder and is contacted with the wavy plate body, the wavy plate body is contacted with the cable, the cable is compressed through the wavy plate body, the contact area between the cable and the tong body is enlarged, and the electric energy of the cable is transmitted to the first tong mouth and the second tong mouth through the wavy plate body, the jackscrew, so as to reduce the possibility that the electric energy transmitted by the cable during the use of the anti-scald electrode holder is converted into heat energy. However, this method can either only deal with one problem or has low practicality.

The reason that the contact resistance is too high due to the use of the existing soldering turret is in many aspects, and the negligence of all links such as installation, use, maintenance and the like can be caused. The hair of the welding tongs is affected by various factors such as time, welding current and environment, and the judgment of a welder is difficult. In addition, the labor protection article for welding is thick and cannot be felt by welders at five or sixty degrees. The welder will experience the temperature of the soldering tweezers in an insulated condition, and the temperature on the conductors inside the soldering tweezers will be higher. A welder who normally stays in a high-temperature environment has no special sensitivity to the seven-eighty-degree temperature of the outer surface of the welding tongs. And often find that because the welder is in the process of working up to the project, the soldering turret is put into the bucket to cool down when being scalded and can not be held by hand, and the soldering turret soaked in water can boil the water, which shows that the temperature of the soldering turret at this moment is far beyond one hundred degrees centigrade. Therefore, the problem of hair waving cannot be solved completely at present.

Disclosure of Invention

The utility model aims at solving the problems and providing an anti-scalding device of a welding tongs which can automatically cut off power when reaching a safe temperature.

The above technical problem of the present invention can be solved by the following technical solutions: an anti-scalding device of welding tongs comprises a fusing connection box and an anti-scalding body arranged in the fusing connection box, and is characterized in that the anti-scalding body comprises a through core shell with a containing space, an outlet connecting terminal and an inlet connecting terminal are respectively arranged at two ends of a through core hole of the shell, and a sodium fuse is arranged between the outlet connecting terminal and the inlet connecting terminal; a beryllium oxide porcelain tube is arranged outside one end of the sodium fuse, which faces out of the wiring terminal; a mica glass layer is arranged in the shell and positioned outside the wiring terminal and the beryllium oxide porcelain tube; and an argon gas cavity is formed in one end of the sodium fuse body, which faces the wiring terminal.

In the burn-proof device for welding tongs, preferably, a straight through pipe is arranged along the center line of the through core hole of the shell, and the straight through pipe passes through all parts at the core part of the passage of the shell.

In the burn-proof device for welding tongs, preferably, the inner wall of the linear through pipe is provided with a wear-resistant layer.

In the anti-scalding device for the welding tongs, preferably, the wire inlet terminal and the shell are connected into a whole through threads; the outgoing wiring terminal and the shell core through hole are positioned through a rubber sleeve.

In the aforesaid welding tongs prevent scalding device, as preferred, the fusing connecting box is equipped with the coupling rod with welding tongs access end complex including holding the fusing box of preventing scalding the body, the one end of fusing box, the other end of fusing box be equipped with power supply line complex cable junction pipe.

The sodium melt fuse is of a big head and a small head, wherein one end facing the argon cavity is a big head.

The technical proposal organically combines the scald preventing body and the electric welding pliers through an intermediate body-fusing connecting box, places the fusing body in the fusing connecting box, and then passes through the connecting rod and the electric welding pliersThe clamp is fixed and equipped with a cable connection pipe cooperating with the power supply line. The scald-proof body is an integral structure seen from the outside, is convenient to install along with the belt, takes a through core shell with a containing space as a basic body, fixes an inlet connecting terminal and an outlet connecting terminal at two ends of the through core shell, a sodium fuse is arranged at the middle part of the through core shell, a beryllium oxide porcelain tube is arranged outside one end of the sodium fuse facing the outlet connecting terminal, the beryllium oxide porcelain is a ceramic with beryllium oxide as a main component, pure beryllium oxide (BeO) belongs to a cubic crystal system, and the density of the beryllium oxide porcelain tube is 3.03g/cm³The melting point is 2570 ℃, the thermal conductivity is almost equal to that of pure red copper aluminum, the thermal conductivity coefficient lambda is 200-; the shell is filled with a mica glass layer, and the mica glass is a refractory insulating material, has excellent high-temperature resistance and combustion resistance, and plays a role in sealing and firming the beryllium oxide porcelain tube. A certain amount of sodium fuse is extruded in the beryllium oxide porcelain tube, and the fuse body is pressed by argon in the argon cavity.

For general manual shielded metal arc welding, the fuse can be directly installed to solve the overheating problem without changing the structure of the original electrode holder. Further, the device is provided with a straight-line through pipe along the center line of the core through hole of the shell so as to meet automatic or semi-automatic welding, the device is used under the condition of not changing the motion trail of the welding wire, and the straight-line through pipe is used as a protective pipe when the welding wire is melted so as to protect the inner wall of the sodium melt fuse hole in the motion process of the welding wire.

Advance binding post and shell and pass through threaded connection and become an organic whole, can easily change and prevent scalding the body, go out and fix a position through high temperature resistant gum cover between binding post and the shell lead to the core hole, both can prevent that the dust from preventing scalding the inside invasion of body, can form axial buffering and location to a binding post again.

Under the normal working condition, current can enter from the wiring terminal, is conducted to the shell through the sodium fuse melt in the beryllium oxide porcelain tube, and is led out from the wiring terminal. When the electrode holders are used for a long time or short-circuit current passes through the scald preventing body, the sodium fuse is rapidly heated by overheating or short-circuit current, so that the sodium fuse is changed into plasma steam in a high-temperature and high-pressure state from a solid, the resistivity is rapidly increased, the strong current limiting effect is achieved on the short-circuit current, and the current is instantly broken. The instantaneous vaporization pressure of the metal sodium can reach 400 MPa, and the pressure is quickly reduced to 30-20 MPa due to the buffer action of the argon gas cavity. When the breaking is finished, the metal sodium vapor is immediately restored to liquid state and solid state, and simultaneously, the argon gas cavity pushes the piston again to compress the sodium melt fuse, so that the circuit is connected again.

Compared with the prior art, the beneficial effects of the utility model are that: gas, metal sodium and the like are used as current limiting elements of the melt, and the sodium melt is instantly in a high-resistance state at high temperature, so that the current is limited to pass through; when the fault disappears, the temperature drops, and the sodium melt automatically recovers the original low-resistance conduction state; the device has the advantages of obvious current limiting effect, short action time, no need of replacing melt after action, repeated use, automatic reclosing and the like.

Drawings

Fig. 1 is a schematic structural view of an embodiment of an anti-scald body of the present invention.

Fig. 2 is a schematic structural view of an embodiment of the hollow scald-proof body of the present invention.

Fig. 3 and fig. 4 are schematic views of the connection status of the scald-proof body of the present invention.

Fig. 5 is a schematic structural view of the installed electrode holders of the present invention.

In the figure: 1. the anti-scald device comprises an anti-scald body, 101 parts of an outlet connecting terminal, 102 parts of a mica glass layer, 103 parts of a beryllium oxide porcelain tube, 104 parts of a shell, 105 parts of a sodium fuse, 106 parts of an argon gas cavity, 107 parts of an inlet connecting terminal, 108 parts of a linear through tube, 109 parts of a rubber sleeve, 2 parts of an electric welding clamp, 3 parts of a fusing connecting box, 301 parts of a connecting rod, 302 parts of a fusing box and 303 parts of a cable connecting tube.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

This embodiment prevents scalding device of soldering turret, includes a fusing connection box 3, refers to fig. 3, fig. 4, fusing connection box 3 comprises coupling rod 301, fusing box 302, cable connecting pipe 303 triplex, and wherein, fusing box 302 is used for assembling and prevents scalding body 1, and coupling rod 301 is used for being connected the cooperation with the incoming end of electrode holder 2, and cable connecting pipe 303 is used for being connected the cooperation with the power supply line.

The first embodiment of the scald preventing body 1 is as follows: as shown in fig. 1, a tubular core-through housing 104 having a core part with a receiving space is provided, the housing 104 is made of austenitic stainless steel, and a terminal 101 and a terminal 107 are respectively provided at both ends of a core-through hole of the housing 1; a sodium melt fuse 105 with a large head and a small head is arranged between the outlet terminal 101 and the inlet terminal 107, a beryllium oxide porcelain tube 103 is arranged outside one end of the sodium melt fuse 105 facing the outlet terminal 101, that is, the small-diameter end of the sodium melt fuse 105 penetrates through the beryllium oxide porcelain tube 103. In the shell 104, mica glass layers 102 are filled outside the connecting terminal 101 and the beryllium oxide porcelain tube 103, an argon gas cavity 106 is arranged at one end of the sodium fuse 105 facing the connecting terminal 107, and the argon gas cavity 106 is filled with argon gas of 10-20 MPa; the end of sodium melt fuse 105 facing argon chamber 106 is the large diameter end. The inlet terminal 107 and the housing 104 are connected into a whole through threads, and the outlet terminal 101 and the core through hole of the housing 104 are positioned and fixed through a rubber sleeve 109.

Embodiment two of the scald preventing body 1: as shown in fig. 2, the basic structure is the same as that of the first embodiment, except that a straight-line through pipe 108 is arranged along the center line of the through hole of the casing 104, the straight-line through pipe 108 is made of high-temperature-resistant and wear-resistant porcelain pipes, the straight-line through pipe 108 penetrates through all parts located at the passage core of the casing 104, including an outlet terminal 101, an inlet terminal 107, a beryllium oxide porcelain pipe 103, a sodium fuse 105 and an argon gas cavity 106, and the inner wall of the straight-line through pipe 108 is provided with a wear-resistant layer.

When in use, the fusing connection box 3 provided with the burn-proof body 1 is connected to the tail part of the electrode holder, and as shown in figure 5, the view of the electrode holder is shown after the device is assembled.

The above embodiments are descriptions of the present invention, not limitations of the present invention, and any structure after simple transformation is all included in the protection scope of the present invention.

Claims (6)

1. A burn-proof device of welding tongs comprises a fusing connection box (3) and a burn-proof body (1) arranged in the fusing connection box, and is characterized in that the burn-proof body comprises a through core shell (104) with a containing space, an outlet connecting terminal (101) and an inlet connecting terminal (107) are respectively arranged at two ends of a through core hole of the shell, and a sodium fuse (105) is arranged between the outlet connecting terminal and the inlet connecting terminal; a beryllium oxide porcelain tube (103) is arranged outside one end of the sodium fuse, which faces out of the connecting terminal; a mica glass layer (102) is arranged in the shell and positioned outside the wiring terminal and the beryllium oxide porcelain tube; and an argon gas cavity (106) is arranged at one end of the sodium fuse body facing the wiring terminal.

2. A burn prevention device for soldering tweezers as claimed in claim 1, wherein a straight through tube (108) is provided along the centerline of the bore through the enclosure (104) and passes through all components in the core of the enclosure passageway.

3. The anti-scalding device for welding tongs according to claim 2, characterized in that the inner wall of the straight through pipe (108) is provided with a wear-resistant layer.

4. A soldering tweezers burn prevention device as defined in claim 1, 2 or 3 wherein said terminal (107) and housing (104) are integrally threaded; the outgoing terminal (101) and the shell core through hole are positioned through a rubber sleeve (109).

5. A welding tongs anti-scalding device according to claim 1, 2 or 3, characterized in that the fuse connection box (3) comprises a fuse box (302) containing the anti-scalding body (1), one end of the fuse box is provided with a coupling rod (301) cooperating with the access end of the welding tongs (2), and the other end of the fuse box is provided with a cable connection tube (303) cooperating with the power supply line.

6. A soldering tweezers burn prevention device as claimed in claim 1 or 2 or 3, wherein said sodium fuse (105) is of a large head, with a large head towards the argon chamber (106).

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