Welding nozzle structure for gas metal arc welding gun

Abstract

The utility model relates to welding gun equipment, in particular to a welding nozzle structure for a gas metal arc welding gun, which comprises a welding nozzle, a gas guide tube, an opening frame, a limiting elastic piece and a burner, the welding nozzle is sleeved at one end outside the gas guide tube, one end of the welding nozzle far away from the gas guide tube is connected with the burner, the welding nozzle is cylindrical, and the welding nozzle faces one end of the burner. The interior of the welding nozzle is matched with the end, inserted into the welding nozzle, of the air guide pipe, and a plurality of limiting elastic pieces are arranged between the welding nozzle and the air guide pipe. The limiting elastic pieces are sequentially arranged in the length direction of the welding nozzle, so that when the gas guide pipe is inserted into the welding nozzle, the gas guide pipe can be embedded into different positions, and through fixing of the limiting elastic pieces, the closed elastic pieces are controlled by the opening size of the opening frame; and therefore, the output quantity of the combustible gas guided out from the closed elastic sheets by the gas guide pipe is controlled.

Description

Technical Field

[0001] The utility model relates to welding gun equipment, in particular to a welding nozzle structure used for a metal-electrode gas shielded welding gun. Background Art

[0002] The welding gun is a gas welding tool that extracts and burns combustible gas to spray out a high-temperature flame as a heat source to perform hot-melt welding between two objects. Therefore, when the welding gun continues to spray combustion gas and burns, the high temperature can easily cause certain overheating damage to the welding nozzle of the welding gun. In the past, the way to deal with this situation was to replace the nozzle, so the welding nozzle was replaced more frequently.

[0003] Publication number CN201755713U is a Chinese utility model patent, which discloses a welding gun conductive nozzle holder that is easy to disassemble and maintain. The conductive nozzle holder of the welding gun includes a conductive nozzle holder body with a through hole inside, both ends of the through hole of the conductive nozzle holder body are provided with threads connected to other components, an annular groove is provided on the outer circumference of the conductive nozzle holder body, and a convex spring piece is provided in the groove; the welding gun conductive nozzle holder described in the utility model has a simple structure, is easy to process, is easy to disassemble and maintain, and will not be stuck when connected to other components, which affects replacement.

[0004] In combination with the above structure, the welding nozzle is twisted onto the welding gun, and after being twisted to a certain area, the two are fixed by ejecting the convex spring piece. However, the convex spring piece needs to be pulled out of the conductive nozzle seat with force, so that the convex bump is squeezed by the nozzle wall, so that the entire convex spring piece is compressed, and the conductive nozzle is removed. This method is difficult to extract the convex spring piece when the welding nozzle has a certain heat, and the plug-in and pull-out method when installing the conductive nozzle is also prone to cause certain cumbersome operations. Therefore, it is necessary to develop a welding nozzle that can be easily replaced and disassembled and can also adjust the gas outlet size. Utility Model Content

[0005] In view of the technical defects existing in the background technology, the utility model proposes a welding nozzle structure for a metal-metal gas shielded welding gun, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0006] The support frame is embedded in the welding nozzle, and the welding nozzle is matched with the end of the welding nozzle into which the welding nozzle is inserted, and a plurality of limiting spring pieces are arranged between the welding nozzle and the welding nozzle; a plurality of receiving grooves are provided in the welding nozzle, and a limiting spring piece is provided in each of the receiving grooves, and a side of the arc-shaped surface of each limiting spring piece protruding outward faces the outer surface of the welding nozzle; and a plurality of limiting grooves corresponding to the plurality of limiting spring pieces are provided on the outer surface of the welding nozzle.

[0007] A connecting ring is provided at one end of the welding nozzle, and a thread is provided on the outer surface of the connecting ring; the inner and outer diameters of the side of the welding nozzle connected to the burner are consistent, and the welding nozzle is embedded in the side connected to the burner by the connecting ring and is engaged through the thread of the connecting ring; a plurality of embedding grooves are provided on the inner edge of the welding nozzle facing the burner.

[0008] The support frame is composed of a plurality of top rods and a top block; one end of each top rod of the support frame is embedded in an embedding groove provided in the welding nozzle, and each top rod of the support frame extends in one direction and tilts toward the tube center of the welding nozzle; the top rods are connected at the intersection of the plurality of top rods of the support frame; one end of the top block away from the plurality of top rods is conically arranged, and this end of the top block faces the end of the air guide tube inserted into the welding nozzle.

[0009] One end of the air guide tube inserted into the welding nozzle is connected to a plurality of closed spring pieces; one end of the plurality of closed spring pieces is respectively connected to the end edge of the air guide tube and is integrally arranged; one end of the plurality of closed spring pieces away from the air guide tube is inclined toward the tube core of the welding nozzle and is closed; the closed ends of the plurality of closed spring pieces are arranged in a straight line with the top block arranged on the support frame.

[0010] One end of the air guide tube away from the welding nozzle is wrapped with a thermal insulation layer and is connected to the external gas injection structure by a wire tube; a plurality of limit grooves are provided on the outer surface of the air guide tube and surround the air guide tube, and a plurality of limit grooves in each ring form a ring, and the air guide tube is arranged in a plurality of rows along the length of the tube.

[0011] The two ends of each of the limiting spring pieces are respectively embedded in the two storage bins opened in the welding nozzle. The limiting spring pieces are squeezed by the outer surface of the air guide tube, and the two ends of the limiting spring pieces are respectively inserted into the two storage bins. The two ends of the limiting spring pieces are respectively provided with a barb, and the two barbs of the limiting spring pieces are respectively hooked on the edges of the two storage bins; an elastic top sheet is provided between the recessed surface of each limiting spring piece and the storage groove, and the limiting spring piece is pushed out to the corresponding limiting groove on the outer surface of the air guide tube through the elastic top sheet.

[0012] The diameter of one end of the nozzle away from the welding nozzle is smaller than that of the end connected to the welding nozzle; an ignition port is provided outside the nozzle and passes through the nozzle, and a plurality of ignition ports are arranged in a ring shape along the outside of the nozzle; an end of the nozzle is away from the welding nozzle, and a guide outlet is provided at the opening.

[0013] The beneficial effects of the utility model are:

[0014] The utility model is used to connect the welding gun, so as to avoid direct contact between the welding gun and the combustion area, thereby causing the welding gun to melt due to heat; one end of the gas guide tube is connected to the welding gun, and the other end of the gas guide tube is inserted into the welding nozzle, and a plurality of limiting spring pieces arranged in the welding nozzle are embedded in the corresponding limiting grooves to realize the connection between the welding nozzle and the gas guide tube; and after the gas guide tube is inserted, the opening frame arranged in the welding nozzle opens the plurality of closed spring pieces of the gas guide tube in a closed state when the gas guide tube is inserted, and at the same time of opening, the tube core of the gas guide tube is exposed, so that the combustible gas injected into the gas guide tube can be discharged, and then the welding nozzle can spray the flame for welding by contacting the ignition object at the burner.

[0015] The utility model has a plurality of limiting spring pieces arranged in sequence along the length direction of the welding nozzle. Therefore, when the welding nozzle is inserted through the air guide tube, it can be embedded in different positions through the air guide tube, and the limiting spring pieces can be fixed to control the size of the opening of the support frame, thereby controlling the output amount of the combustible gas derived from the plurality of closing spring pieces by the air guide tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic diagram of the internal structure of a welding nozzle structure used for a metal-electrode gas shielded welding welding gun.

[0017] Figure 2 The present invention is a schematic diagram of the internal structure of a gas guide pipe of a welding nozzle structure of a metal-electrode gas shielded welding welding gun away from a support frame.

[0018] Figure 3 The present invention is a schematic diagram of the partial three-dimensional structure of a welding nozzle of a welding nozzle structure for a metal-electrode gas shielded welding welding gun.

[0019] Figure 4 The present invention is a schematic diagram of the combined structure of a welding nozzle, a gas guide tube and a limiting spring piece of a welding nozzle structure for a metal-electrode gas shielded welding welding gun. DETAILED DESCRIPTION

[0020] The implementation methods of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0021] like Figures 1 to 4 As shown, a welding nozzle structure for a metal-metal gas shielded welding welding gun comprises: a welding nozzle 1, an air guide tube 2, a support frame 3, a limiting spring piece 4 and a nozzle 5, wherein the welding nozzle 1 is sleeved at one end outside the air guide tube 2, and the end of the welding nozzle 1 away from the air guide tube 2 is connected with the nozzle 5, the welding nozzle 1 is arranged in a cylindrical body, the welding nozzle 1 faces one end of the nozzle 5, and has an open frame 3 embedded therein, the welding nozzle 1 is consistent with the end of the air guide tube 2 inserted into the welding nozzle 1, and a plurality of limiting spring pieces 4 are arranged between the welding nozzle 1 and the air guide tube 2; a plurality of receiving grooves 12 are provided in the welding nozzle 1, and a limiting spring piece 4 is arranged in each of the receiving grooves 12, and a curved surface of each limiting spring piece 4 protrudes outwardly toward the outer surface of the air guide tube 2; a plurality of limiting grooves corresponding to the plurality of limiting spring pieces 4 are provided on the outer surface of the air guide tube 2.

[0022] The utility model is used to connect a welding gun to avoid direct contact between the welding gun and the combustion area, thereby causing the welding gun to melt due to heat, and one end of the gas guide tube 2 is connected to the welding gun, and the other end of the gas guide tube 2 is inserted into the welding nozzle 1, and a plurality of limiting spring pieces 4 arranged in the welding nozzle 1 are embedded in the corresponding limiting grooves to realize the connection between the welding nozzle 1 and the gas guide tube 2, and after the gas guide tube 2 is inserted, the expansion frame 3 arranged in the welding nozzle 1 expands the plurality of closed spring pieces 21 of the gas guide tube 2 in a closed state when the gas guide tube 2 is inserted, and at the same time, the tube core of the gas guide tube 2 is exposed, so that the combustible gas injected into the gas guide tube 2 can be discharged, and then contact the ignition object at the burner 5, so that the welding nozzle 1 can spray the welding flame.

[0023] The utility model provides a plurality of limiting spring pieces 4 in sequence along the length direction of the welding nozzle 1. Therefore, when the welding nozzle 1 is inserted through the air duct 2, the air duct 2 can be embedded in different positions, and the limiting spring pieces 4 can be fixed to control the size of the opening of the opening frame 3, thereby controlling the output amount of the combustible gas derived from the plurality of closing spring pieces 21 by the air duct 2.

[0024] After adopting the above structure, it needs to be further explained that the welding nozzle 1 is arranged in a cylindrical shape, which can facilitate the rotation of the circular air guide tube 2 inserted inside the welding nozzle 1. At the same time, the air guide tube 2 and the welding nozzle 1 are both arranged in a cylindrical shape, and the two curved surfaces fit each other, so that the gap between the air guide tube 2 and the welding nozzle 1 can be reduced as much as possible to avoid leakage of combustible gas.

[0025] A connecting ring 11 is provided at one end of the welding nozzle 1, and a thread is provided on the outer surface of the connecting ring 11; the inner and outer diameters of the side of the welding nozzle 1 connected to the burner nozzle 5 are consistent, and the welding nozzle 1 is embedded in the side connected to the burner nozzle 5 using the connecting ring 11 and is engaged through the thread of the connecting ring 11; the welding nozzle 1 is provided with a plurality of embedding grooves at the inner edge of the burner nozzle 5.

[0026] After adopting the above structure, it needs to be further explained that the welding nozzle 1 and the connecting ring 11 are arranged in an integrated manner.

[0027] The threaded engagement connection of the connecting ring 11 to the nozzle 5 allows the nozzle 5 for emitting the flame to be engaged and replaced when the welding nozzle 1 is put on the gas guide tube 2. Moreover, the nozzle 5 is prone to certain damage after being used for a long time when emitting the flame. Therefore, the welding nozzle 1 and the nozzle 5 are connected in an engaging manner, so that if the nozzle 5 is damaged later, the nozzle 5 can be disassembled and replaced by engaging and twisting.

[0028] The support frame 3 is composed of a plurality of top rods and a top block 31; one end of each top rod of the support frame 3 is embedded in an embedding groove provided in the welding nozzle 1, and each top rod of the support frame 3 extends in one direction and is inclined toward the tube center of the welding nozzle 1; the intersection of the plurality of top rods of the support frame 3 is connected to the top rod 31; the top block 31 is tapered at one end away from the plurality of top rods, and this end of the top block 31 faces the end of the air guide tube 2 inserted into the welding nozzle 1.

[0029] After adopting the above structure, it needs to be further explained that the utility model is provided with four push rods, and the interface of each push rod is polygonal, and one end of each push rod is provided with a bending section toward the top block 21, and the bending section is embedded in the edge of the welding nozzle 1. This arrangement can prevent the embedded support frame 3 from rotational displacement, and after the welding nozzle 1 is connected to the nozzle 5, because the diameter of the connection position of the welding nozzle 1 and the nozzle 5 is consistent, after the nozzle 5 passes through the connecting ring 11, the surface of the nozzle 5 overlaps the welding nozzle 1, and the bending sections of the four push rods are fixed to the edge of the welding nozzle 1 through extrusion and limiting. This prevents the support frame 3 from loosening and the center of the welding nozzle 1 is convenient, and also prevents the support frame 3 from falling off from the welding nozzle 1.

[0030] The conical top block 31 is used to open the multiple closed spring pieces 21 in a closed state. When the air guide tube 2 is inserted along one direction of the welding nozzle 1, the conical end of the top block 31 is inserted into the center of the multiple closed spring pieces 21 that are mutually attached to each other, so as to open the multiple closed spring pieces 21 and open the multiple closed spring pieces 21 along the top rod behind the top block 21. Therefore, according to the inward or outward movement, the top block 31 and the top rod control and adjust the opening and closing size of the multiple closed spring pieces 21 in the closed state.

[0031] One end of the air duct 2 inserted into the welding nozzle 1 is connected to a plurality of closing spring pieces 21; one end of the plurality of closing spring pieces 21 is respectively connected to the end edge of the air duct 2 and is integrally arranged; one end of the plurality of closing spring pieces 21 away from the air duct 2 is inclined toward the tube center of the welding nozzle 1 and is closed; the closed ends of the plurality of closing spring pieces 21 are arranged in a straight line with the top block 31 arranged on the support frame 3.

[0032] After adopting the above structure, it needs to be further explained that one ends of several closed spring pieces 21 in the closed state fit together, so that the end of the air duct 2 is in a closed state. When the welding nozzle 1 is not inserted, the air duct 2 is closed to avoid leakage of combustible gas. In order to ensure that the several closed spring pieces 21 are not stretched open by the top block 31 and remain in contact with each other, the several closed spring pieces 21 of the utility model are made of a material with resilience.

[0033] One end of the air guide tube 2 away from the welding nozzle 1 is wrapped with a thermal insulation layer and is connected to the external gas injection structure in a wire tube; a plurality of limit grooves are provided on the outer surface of the air guide tube 2 and surround the air guide tube 2, and a plurality of limit grooves in each ring form a ring, and the air guide tube 2 is arranged in a plurality of rows along the length of the tube.

[0034] After adopting the above structure, it needs to be further explained that each ring of the air guide tube 2 is evenly provided with four limiting grooves, and the air guide tube 2 is provided with four rings along the tube length.

[0035] When the air guide tube 2 is inserted into the welding nozzle 1, the limiting groove of the air guide tube 2 is matched with the limiting spring piece 4, and the limiting spring piece 4 is embedded in the limiting groove to achieve insertion and fixing, so that the welding nozzle 1 is prevented from falling off from the outside of the air guide tube 2, and the four limiting grooves of each ring can prevent the welding nozzle 1 from rotating when no external force is applied.

[0036] When the welding tip 1 needs to be disassembled, the welding tip 1 is rotated left or right along the center of the circle through external force, so that the edge of the limiting groove squeezes the limiting spring piece 4, so that the limiting spring piece 4 is stored in the storage groove 12, and the limiting spring piece 4 is kept in an squeezed state through the outer surface of the air guide tube 2 where no limiting groove is set, so that the limiting spring piece 4 is kept away from the limiting groove, so that the air guide tube 2 and the welding tip 1 are only in a fitted state, and the welding tip 1 is pulled outward in one direction to achieve disassembly.

[0037] The two ends of each of the limiting spring pieces 4 are respectively embedded in the two storage bins 13 opened in the welding nozzle 1. The limiting spring piece 4 is squeezed by the outer surface of the air guide tube 2, and the two ends of the limiting spring piece 4 are respectively inserted into the two storage bins 13. The two ends of the limiting spring piece 4 are respectively provided with a barb, and the two barbs of the limiting spring piece 4 are respectively hooked at the edges of the two storage bins 3; an elastic top sheet 41 is provided between the concave surface of each limiting spring piece 4 and the storage groove 12, and the limiting spring piece 4 is pushed out to the corresponding limiting groove on the outer surface of the air guide tube 2 by the elastic top sheet 41.

[0038] After adopting the above structure, it needs to be further explained that the limiting spring piece 4 of the utility model is made of metal with resilience.

[0039] When the limiting spring piece 4 is compressed, the two ends of the limiting spring piece 4 extend toward the two storage bins 13 respectively, providing a retractable space for the limiting spring piece 4, and the barbs at both ends of the limiting spring piece 4 will respectively hook on the edges of the two storage bins 13 in a pop-up state to prevent the limiting spring piece 4 from falling off.

[0040] In order to ensure that the convex arc surface of the limiting spring piece 4 remains in a convex state, an elastic top sheet 41 with elasticity and arc shape is further provided between the limiting spring piece 4 and the receiving groove 12. The elastic top sheet 41 is used to push the arc surface of the limiting spring piece 4 outward. When the limiting spring piece 4 is squeezed, the elastic top sheet 41 is bent and in an extruded and tightened state due to its arc shape. When the limiting spring piece 4 is not squeezed, the elastic top sheet 41 is released from the tightened state and quickly pushes the arc section of the limiting spring piece 4 outward.

[0041] In order to allow the elastic top sheet 41 to be vertically arranged between the limiting spring sheet 4 and the receiving groove 12 , the limiting spring sheet 4 and the receiving groove 12 are respectively provided with a notch for connecting the two ends of the elastic top sheet 41 .

[0042] The ejection of the limiting spring piece 4 of the utility model can also be achieved by a spring setting. The elasticity of the spring piece is relatively weak, but it can store energy under twisting and squeezing conditions, making the limiting spring piece 4 reset faster. Therefore, the utility model uses an elastic top sheet 4 to eject the limiting spring piece 4, which is the best choice.

[0043] The diameter of one end of the nozzle 5 away from the welding nozzle 1 is smaller than that of the end connected to the welding nozzle 1; an ignition port 51 is provided outside the nozzle 5 and penetrates into the nozzle 5, and a plurality of ignition ports 51 are arranged in a ring shape in sequence along the outside of the nozzle 5; an end of the nozzle 5 away from the welding nozzle 1 is provided with a guide outlet 6 at the opening.

[0044] After adopting the above structure, it needs to be further explained that the several ignition ports 51 at the beginning of the burner 5 are used for external ignition materials to contact the ignition ports 51, so that the combustible gas discharged from the welding nozzle 1 can burn through the ignition materials. This setting can avoid the danger of the ignition materials contacting the burner 5 and causing the ejected flame to spray and burn the operator's hands or the ignition materials.

[0045] The outlet 6 is the final outlet of the flame, and therefore, the outlet 6 of the present invention is made of high temperature resistant material. When the outlet 6 is damaged, it can be replaced by disassembling the burner.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A welding nozzle structure for a metal-metal gas shielded welding gun, comprising: A welding nozzle, an air duct, a support frame, a limiting spring piece and a burner, wherein the welding nozzle sleeve is placed at one end outside the air duct, the end of the welding nozzle away from the air duct is connected to the burner, the welding nozzle is arranged in a cylindrical body, the welding nozzle faces one end of the burner, and an open frame is embedded inside the welding nozzle, the welding nozzle is consistent with the end of the air duct inserted into the welding nozzle, and a plurality of limiting spring pieces are arranged between the welding nozzle and the air duct; A plurality of receiving grooves are provided in the welding nozzle, each of which is provided with a limiting spring piece, and a side of the arc-shaped surface of each limiting spring piece that protrudes outwards faces the outer surface of the air guide tube; The outer surface of the air guide tube is provided with a plurality of limiting grooves corresponding to the plurality of limiting spring sheets.

2. The welding nozzle structure for a metal-metal gas shielded welding gun according to claim 1, characterized in that: A connecting ring is provided at one end of the welding nozzle, and a thread is provided on the outer surface of the connecting ring; The inner and outer diameters of the side of the welding nozzle connected to the burner are consistent, and the welding nozzle is embedded in the side connected to the burner by the connecting ring and is engaged by the thread of the connecting ring; The welding nozzle is provided with a plurality of embedding grooves at the inner edge of the nozzle.

3. The welding nozzle structure for a metal-metal gas shielded welding gun according to claim 2, characterized in that: The support frame is composed of a plurality of top rods and a top block; One end of each top rod of the open frame is embedded in an embedding groove provided in the welding nozzle, and each top rod of the open frame extends in one direction and tilts toward the tube center of the welding nozzle; The intersection of the plurality of top rods of the support frame is connected to the top rod; One end of the top block away from the plurality of top rods is arranged in a conical shape, and the end of the top block faces one end of the air guide tube inserted into the welding nozzle.

4. The welding nozzle structure for a metal-metal gas shielded welding gun according to claim 1, characterized in that: One end of the air guide tube inserted into the welding nozzle is connected to a plurality of closing spring pieces; One end of a plurality of the closing spring pieces is respectively connected to the end edge of the air guide tube and is integrally arranged. One end of a plurality of the closing spring pieces away from the air guide tube is inclined toward the tube core of the welding nozzle and is closed; The closed ends of the plurality of closing spring sheets are arranged in a straight line with the top block arranged on the propping frame.

5. The welding nozzle structure for a metal-metal gas shielded welding gun according to claim 4, characterized in that: One end of the air guide tube away from the welding nozzle is wrapped with a thermal insulation layer and is connected to the external gas injection structure in the form of a wire tube; The air guide tube has a plurality of limit grooves on its outer surface which surround the air guide tube, and the plurality of limit grooves in each ring form a ring. The air guide tube is arranged in a plurality of rows along the length of the tube.

6. The welding nozzle structure for a metal-metal gas shielded welding gun according to claim 1, characterized in that: The two ends of each of the limiting spring pieces are respectively embedded in the two storage bins opened in the welding nozzle. The limiting spring pieces are respectively inserted into the two storage bins by the extrusion of the outer surface of the air guide tube. The two ends of the limiting spring pieces are respectively provided with a barb, and the two barbs of the limiting spring pieces are respectively hooked at the edges of the two storage bins. An elastic top sheet is provided between the concave surface of each of the limiting spring sheets and the receiving groove, and the limiting spring sheets are pushed out through the elastic top sheet to the corresponding limiting groove on the outer surface of the air guide tube.

7. The welding nozzle structure for a metal-metal gas shielded welding gun according to claim 1, characterized in that: The diameter of one end of the nozzle away from the welding nozzle is smaller than that of the end connected to the welding nozzle; The burner nozzle is provided with an ignition port extending through the burner nozzle, and a plurality of ignition ports are sequentially arranged in a ring shape along the outside of the burner nozzle; The flame nozzle is located away from one end of the welding nozzle, and a guide outlet is provided at the opening.

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