Welding and cutting nozzle with adjustable inner diameter

Abstract

The utility model relates to the technical field of welding gun accessories, in particular to a welding and cutting nozzle with an adjustable inner diameter, and aims to solve the problems that the inner diameter of the conventional nozzle is fixed, the inner diameter cannot be adjusted at any time, and the welding efficiency and the production speed are very influenced. Comprising a nozzle front end, an adjusting valve, a flow adjusting ring and a nozzle rear end, an inner cavity is formed in the nozzle front end, the adjusting valve sequentially comprises a front end valve body and a rear end valve body, the front end valve body and the rear end valve body are fixedly connected through a bolt, a plurality of movable trapezoidal sliding blocks are arranged in the rear end valve body, and a rail groove is formed in the flow adjusting ring. The trapezoidal sliding block is connected with the track groove through the limiting sliding rod, the nozzle front end, the adjusting valve, the flow adjusting ring and the nozzle rear end are sequentially connected, and the whole nozzle has the advantages that easily-damaged parts can be replaced, cost is saved, and the inner diameter can be adjusted to adapt to different welding requirements and welding workpiece materials.

Description

Technical Field

[0001] The utility model relates to the technical field of welding gun accessories, in particular to an adjustable inner diameter type welding and cutting nozzle. Background Art

[0002] The welding gun is the part that performs the welding operation during the welding process. When working, the welding gun uses the high current and high voltage of the welding machine to generate heat and gather it at the terminal of the welding gun to melt the welding wire. The molten welding wire penetrates into the part to be welded. After cooling, the objects to be welded are firmly connected into one. In order to prevent poor welding quality caused by rapid oxidation during the welding process, shielding gas is usually introduced during welding.

[0003] The main function of the welding gun nozzle in the welding process is to control the flow of arc, airflow and shielding gas. The inner diameter of the nozzle directly affects the flow, speed and distribution of the shielding gas, and therefore also affects the welding quality. The inner diameter of the nozzle affects the circulation speed and flow of the shielding gas, and also indirectly affects the welding speed during welding. Generally, a smaller inner diameter of the nozzle will lead to a decrease in the flow of the shielding gas, thereby reducing the welding speed and efficiency. Conversely, a larger inner diameter of the nozzle may cause the shielding gas flow rate to be too fast and the arc to be unstable, which will also reduce the welding efficiency. The existing nozzle inner diameter is fixed and the inner diameter cannot be adjusted at any time to adapt to different welding requirements and welding workpiece materials, which greatly affects the welding efficiency and production speed. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the inner diameter of the existing nozzle is fixed and the inner diameter cannot be adjusted at any time to adapt to different welding requirements and welding workpiece materials, which greatly affects the welding efficiency and production speed.

[0005] The technical solution adopted by the utility model to solve its technical problems is: the utility model provides an adjustable inner diameter welding and cutting nozzle, including a nozzle front end, a regulating valve, a flow regulating ring and a nozzle rear end, the nozzle front end is provided with an inner cavity, a cooling channel is provided between the outer wall of the nozzle front end and the inner cavity, the regulating valve comprises a front valve body and a rear valve body in sequence, the front valve body and the rear valve body are fixedly connected by bolts, one end of the rear valve body is provided with a hexagonal opening and closing groove, the bottom of the opening and closing groove is provided with an airway through hole penetrating the front valve body and the rear valve body, the bottom of the opening and closing groove is provided with a plurality of limit slots around the airway through hole, the hexagonal opening and closing Six isosceles trapezoidal sliders are arranged along the inner wall of the groove, the upper base and waist of the trapezoidal slider are fitted with the inner wall of the hexagonal opening and closing groove, a limiting slide bar is arranged on the trapezoidal slider, the limiting slide bar is slidably arranged in the limiting slot hole, the limiting slide bar end passes through the limiting slot hole and extends to the outside of the rear end valve body, a plurality of track grooves are equidistantly arranged on the inner ring of the flow regulating ring, an air flow hole is arranged inside the rear end of the nozzle, the front end of the nozzle, the regulating valve, the flow regulating ring and the rear end of the nozzle are connected in sequence, the inner cavity is connected with the airway through hole, the airway through hole is connected with the air flow hole, and one end of the limiting slide bar passes through the limiting slot hole and extends to the track groove.

[0006] Preferably, a threaded connection ring is provided at one end opening of the inner cavity of the front end of the nozzle, a thread is provided on the inner wall of the airway through hole of the front end valve body, and the threaded connection ring is screwed into the airway through hole of the front end valve body. The front end of the nozzle is detachable and replaceable, and is connected to the regulating valve through the threaded connection ring.

[0007] Preferably, a hexagonal boss protrudes from one end of the front valve body, the airway through hole passes through the boss, the boss is embedded in the opening and closing groove, a plurality of limit grooves are formed on the boss, and one end of the limit slide rod is slidably installed in the limit groove. The boss fits with the trapezoidal slider to prevent the trapezoidal slider from shaking, and the trapezoidal slider can move in the gap between the boss and the opening and closing groove. The simultaneous movement of the six trapezoidal sliders can adjust the inner diameter to affect the efficiency of airflow.

[0008] Preferably, a first limiting ring is provided at the opening of the airway through hole on one side of the boss, and the diameter of the first limiting ring is smaller than the outer diameter of the threaded connection ring. The first limiting ring can play a role of limiting and sealing to prevent gas leakage.

[0009] Preferably, a covering protective sleeve is provided on the outer ring of the flow regulating ring, and the surface of the covering protective sleeve is provided with anti-skid patterns, and the covering protective sleeve is sleeved on the rear end of the nozzle. The covering protective sleeve can effectively prevent external impurities from entering the air flow channel from the gap, and also has a sealing function. The covering protective sleeve and the anti-skid patterns can increase the contact area, and it is not easy to slip during rotation.

[0010] Preferably, both ends of the rear end of the nozzle are provided with connectors, the connectors are connected to the air flow holes, and the rear end of the nozzle is screwed into the air passage holes on the rear end valve body through the connectors. The connectors are used to connect the regulating valve and the rear end pipeline.

[0011] Preferably, a second limiting ring is provided at the opening of the airway through hole at the bottom of the opening and closing groove, and the diameter of the second limiting ring is smaller than the outer diameter of the connecting piece. The second limiting ring can play a role of limiting and sealing to prevent gas leakage.

[0012] Preferably, first sealing rings are provided at both ends of the flow regulating ring, and first annular sealing grooves are provided at the ends of the rear end valve body and the rear end of the nozzle that are in contact with the flow regulating ring, and the first sealing ring is embedded in the first annular sealing groove. The combination of the first sealing ring and the first annular sealing groove can effectively prevent gas leakage.

[0013] Preferably, the end where the front valve body and the front end of the nozzle are attached are respectively provided with a second sealing ring and a second sealing groove, and the second sealing ring is embedded in the second sealing groove. The combination of the second sealing ring and the second sealing groove can increase the sealing performance of the front valve body and the front end of the nozzle.

[0014] The beneficial effects of the utility model are as follows: by dividing the nozzle into multiple structures, a regulating valve which can adjust the inner diameter of the nozzle at any time can be provided in the nozzle while ensuring that the front end of the nozzle which is easily damaged can be replaced at any time, and the opening and closing of the regulating valve can be controlled by a flow regulating ring. The entire nozzle has the advantages of cost saving by replaceable parts which are easily damaged, and the advantages of adjusting the inner diameter to adapt to different welding requirements and welding workpiece materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 It is a schematic diagram of the utility model in a disassembled state;

[0017] Figure 2 It is a three-dimensional schematic diagram of the utility model;

[0018] Figure 3 It is the front view of the utility model;

[0019] Figure 4 This utility model Figure 3 A schematic diagram of the structure enlarged at AA;

[0020] Figure 5 It is a half-section schematic diagram of the front end of the nozzle of the utility model;

[0021] Figure 6 This is a three-dimensional schematic diagram of the front end valve body of the utility model. Figure 1 ;

[0022] Figure 7 This is a three-dimensional schematic diagram of the front end valve body of the utility model. Figure 2 ;

[0023] Figure 8 This is a three-dimensional schematic diagram of the flow regulating ring of the utility model. Figure 1 ;

[0024] Fig. 9 This is a three-dimensional schematic diagram of the flow regulating ring of the utility model. Figure 2 ;

[0025] Fig.10 This is a three-dimensional diagram of the closed state of the regulating valve and flow regulating ring of the utility model Figure 1 ;

[0026] Fig.11 This is a three-dimensional diagram of the closed state of the regulating valve and flow regulating ring of the utility model Figure 2 ;

[0027] Fig.12 This is a schematic diagram of the partial structure of the utility model when the regulating valve is in the open state Figure 1 ;

[0028] Fig.13 This is a schematic diagram of the partial structure of the utility model when the regulating valve is in the open state Figure 2 ;

[0029] Fig.14 It is a three-dimensional schematic diagram of the rear end of the nozzle of the utility model;

[0030] Fig.15 It is a three-dimensional schematic diagram of a trapezoidal sliding block of the utility model.

[0031] In the figure: 1. front end of the nozzle, 2. regulating valve, 3. flow regulating ring, 4. rear end of the nozzle, 5. threaded connecting ring, 6. boss, 7. first limiting ring, 8. covering protective sleeve, 9. anti-slip pattern, 10. connecting piece, 11. second limiting ring, 12. first sealing ring, 13. first annular sealing groove, 14. second sealing ring, 15. second sealing groove, 101. inner cavity, 102. cooling channel, 201. front end valve body, 202. rear end valve body, 203. bolt, 204. opening and closing groove, 205. airway through hole, 206. limiting slot hole, 207. trapezoidal slider, 208. limiting slide rod, 301. track groove, 401. air flow hole, 601. limiting slot. DETAILED DESCRIPTION

[0032] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0033] Reference throughout the specification to "in a specific embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Therefore, the phrases "in a specific embodiment" or "in some embodiments" appear in various places throughout the specification, not all of which refer to the same embodiment. In addition, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0034] like Figures 1 to 15 The adjustable inner diameter welding and cutting nozzle shown in the figure comprises a nozzle front end 1, a regulating valve 2, a flow regulating ring 3 and a nozzle rear end 4, wherein the nozzle front end 1 is provided with an inner cavity 101, a cooling channel 102 is provided between the outer wall of the nozzle front end 1 and the inner cavity 101, the regulating valve 2 comprises a front valve body 201 and a rear valve body 202 in sequence, the front valve body 201 and the rear valve body 202 are fixedly connected by bolts 203, a hexagonal opening and closing groove 204 is provided at one end of the rear valve body 202, an airway through hole 205 penetrating the front valve body 201 and the rear valve body 202 is provided at the bottom of the opening and closing groove 204, a plurality of limiting slots 206 are provided around the airway through hole 205 at the bottom of the opening and closing groove 204, and six isosceles ladders are provided along the inner wall of the hexagonal opening and closing groove 204. The trapezoidal slider 207 has an upper bottom and a waist that fit with the inner wall of the hexagonal opening and closing groove 204. A limiting slide bar 208 is arranged on the trapezoidal slider 207. The limiting slide bar 208 is slidably arranged in the limiting groove hole 206. The end of the limiting slide bar 208 passes through the limiting groove hole 206 and extends to the outside of the rear end valve body 202. A plurality of track grooves 301 are equidistantly arranged on the inner ring of the flow regulating ring 3. An air flow hole 401 is arranged inside the rear end 4 of the nozzle. The front end 1 of the nozzle, the regulating valve 2, the flow regulating ring 3 and the rear end 4 of the nozzle are connected in sequence. The inner cavity 101 is connected with the airway through hole 205. The airway through hole 205 is connected with the air flow hole 401. One end of the limiting slide bar 208 passes through the limiting groove hole 206 and extends to the track groove 301.

[0035] In a specific embodiment, Figure 1 , Figure 5 and Figure 6 As shown, a threaded connection ring 5 is provided at the opening of one end of the inner cavity 101 of the front end 1 of the nozzle, and a thread is provided on the inner wall of the airway through hole 205 of the front end valve body 201, and the threaded connection ring 5 is screwed into the airway through hole 205 of the front end valve body 201.

[0036] In a specific embodiment, Figure 1 , Figure 7 and Fig.12 As shown, a hexagonal boss 6 protrudes from one end of the front end valve body 201, the airway through hole 205 passes through the boss 6, the boss 6 is embedded in the opening and closing groove 204, and a plurality of limit grooves 601 are opened on the boss 6. One end of the limit slide rod 208 is slidably installed in the limit groove 601.

[0037] In a specific embodiment, Figure 1 and Figure 6 As shown, a first limiting ring 7 is provided at the opening of the airway through hole 205 on one side of the boss 6 , and the diameter of the first limiting ring 7 is smaller than the outer diameter of the threaded connection ring 5 .

[0038] In a specific embodiment, Figure 1 and Fig. 9 As shown, a covering protective sleeve 8 is arranged on the outer ring of the flow regulating ring 3 , and an anti-slip pattern 9 is arranged on the surface of the covering protective sleeve 8 . The covering protective sleeve 8 is sleeved on the rear end 4 of the nozzle.

[0039] In a specific embodiment, Figure 1 and Fig.10 As shown, both ends of the nozzle rear end 4 are provided with connecting pieces 10 , which are connected to the air flow holes 401 , and the nozzle rear end 4 is screwed into the air passage holes 205 on the rear end valve body 202 through the connecting pieces 10 .

[0040] In a specific embodiment, Figure 1 and Fig.10 As shown, a second limiting ring 11 is provided at the opening of the airway through hole 205 at the bottom of the opening and closing groove 204 , and the diameter of the second limiting ring 11 is smaller than the outer diameter of the connecting member 10 .

[0041] In a specific embodiment, Figure 1 , Figure 8 , Fig. 9 , Fig.10 , Fig.13 and Fig.14 As shown, first sealing rings 12 are provided at both ends of the flow regulating ring 3 , and first annular sealing grooves 13 are formed at the ends of the rear end valve body 202 and the rear end 4 of the nozzle that are in contact with the flow regulating ring 3 , and the first sealing rings 12 are embedded in the first annular sealing grooves 13 .

[0042] In a specific embodiment, Figure 5 and Figure 6 As shown, the end where the front end valve body 201 and the front end 1 of the nozzle are attached are respectively provided with a second sealing ring 14 and a second sealing groove 15 , and the second sealing ring 14 is embedded in the second sealing groove 15 .

[0043] The utility model needs to be assembled before use. First, the flow regulating ring 3 is installed on the side of the rear end 4 of the nozzle, so that the first sealing ring 12 is embedded in the first annular sealing groove 13 of the rear end valve body 202, and then the rear end valve body 202 is installed in close contact with the flow regulating ring 3, so that the first sealing ring 12 is embedded in the first annular sealing groove 13 of the rear end valve body 202, and the rear end valve body 202 is rotated at the same time, and the two components are fixed together by screwing the airway through hole 205 and the connecting piece 10, and the trapezoidal slider 207 is placed in the opening and closing groove 204. The trapezoidal slider 207 is arranged along the inner wall, and the upper bottom and waist of the trapezoidal slider 207 are in contact with the inner wall of the opening and closing groove 204. The limiting slide bar 208 of the trapezoidal slider 207 passes through the limiting slot hole 206 and extends into the track groove 301. The boss 6 at one end of the front end valve body 201 is embedded into the opening and closing groove 204 and installed close to the trapezoidal slider 207. At this time, one end of the limiting slide bar 208 is located in the limiting slot 601, and the front end valve body 201 and the rear end valve body 202 are fixedly connected together by bolts 203, and the threaded connection ring 5 at the front end of the nozzle is connected. Screw it into the airway through hole 205 of the front end valve body 201, wherein cooling water can also be injected into the cooling channel 102 of the front end 1 of the nozzle for cooling. The front end 1 of the nozzle can be replaced at any time. When the inner diameter of the nozzle needs to be adjusted, the covering protective sleeve 8 of the rotating flow adjustment ring 3 is used, and the track groove 301 on the flow adjustment ring 3 moves with the limiting slide bar 208, and all the trapezoidal sliders 207 are simultaneously fitted to the inner wall of the opening and closing groove 204 and displaced. At this time, the space formed between the relative angles of several trapezoidal sliders 207 will change, thereby changing the inner diameter of the nozzle, affecting the gas flow speed to adapt to different welding requirements and welding workpiece materials. When the trapezoidal slider 207 is in a fully open state, the diameter of the space formed by it is smaller than the diameter of the airway through hole 205, which can effectively prevent gas leakage. When the trapezoidal slider 207 is in a fully closed state, a gap will be generated between it and the airway through hole 205 to prevent complete blockage of the airway and cause damage to the equipment. The entire nozzle has the advantages of cost saving by replacing easily damaged parts and adjusting the inner diameter to adapt to different welding requirements and welding workpiece materials.

[0044] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An adjustable inner diameter welding and cutting nozzle, characterized in that: include, A nozzle front end (1), wherein the nozzle front end (1) is provided with an inner cavity (101), and a cooling channel (102) is provided between an outer wall of the nozzle front end (1) and the inner cavity (101); A regulating valve (2), the regulating valve (2) comprising a front valve body (201) and a rear valve body (202) in sequence, the front valve body (201) and the rear valve body (202) being fixedly connected by bolts (203), one end of the rear valve body (202) being provided with a hexagonal opening and closing groove (204), the bottom of the opening and closing groove (204) being provided with an air passage through hole (205) penetrating the front valve body (201) and the rear valve body (202), the bottom of the opening and closing groove (204) surrounding the air passage through hole (205) A plurality of limit slots (206) are provided, and six isosceles trapezoidal sliders (207) are provided along the inner wall of the hexagonal opening and closing slot (204). The upper base and waist of the trapezoidal slider (207) are in contact with the inner wall of the hexagonal opening and closing slot (204). A limit slide bar (208) is provided on the trapezoidal slider (207). The limit slide bar (208) is slidably provided in the limit slot (206), and the end of the limit slide bar (208) passes through the limit slot (206) and extends to the outside of the rear end valve body (202); A flow regulating ring (3), wherein a plurality of track grooves (301) are arranged at equal intervals on the inner ring of the flow regulating ring (3); A nozzle rear end (4), wherein an air flow hole (401) is provided inside the nozzle rear end (4); The nozzle front end (1), the regulating valve (2), the flow regulating ring (3) and the nozzle rear end (4) are connected in sequence, the inner cavity (101) is connected to the airway through hole (205), the airway through hole (205) is connected to the air flow hole (401), and one end of the limiting slide rod (208) passes through the limiting slot hole (206) and extends into the track slot (301).

2. The adjustable inner diameter welding and cutting nozzle according to claim 1, characterized in that: A threaded connection ring (5) is provided at an opening at one end of the inner cavity (101) of the front end of the nozzle, and a thread is provided on the inner wall of the airway through hole (205) of the front end valve body (201), and the threaded connection ring (5) is screwed into the airway through hole (205) of the front end valve body (201).

3. The adjustable inner diameter welding and cutting nozzle according to claim 1, characterized in that: A hexagonal boss (6) protrudes from one end of the front end valve body (201), the airway through hole (205) passes through the boss (6), the boss (6) is embedded in the opening and closing groove (204), a plurality of limit grooves (601) are formed on the boss (6), and one end of the limit sliding rod (208) is slidably installed in the limit groove (601).

4. The adjustable inner diameter welding and cutting nozzle according to claim 3, characterized in that: A first limiting ring (7) is provided at the opening of the airway through hole (205) located on one side of the boss (6), and the diameter of the first limiting ring (7) is smaller than the outer diameter of the threaded connection ring (5).

5. The adjustable inner diameter welding and cutting nozzle according to claim 1, characterized in that: The outer ring of the flow regulating ring (3) is provided with a covering protective sleeve (8), the surface of the covering protective sleeve (8) is provided with anti-slip grooves (9), and the covering protective sleeve (8) is sleeved on the rear end (4) of the nozzle.

6. The adjustable inner diameter welding and cutting nozzle according to claim 1, characterized in that: Both ends of the nozzle rear end (4) are provided with connecting pieces (10), the connecting pieces (10) are connected to the air flow hole (401), and the nozzle rear end (4) is screwed into the air passage hole (205) on the rear end valve body (202) through the connecting pieces (10).

7. The adjustable inner diameter welding and cutting nozzle according to claim 6, characterized in that: A second limiting ring (11) is provided at the opening of the airway through hole (205) at the bottom of the opening and closing groove (204), and the diameter of the second limiting ring (11) is smaller than the outer diameter of the connecting piece (10).

8. The adjustable inner diameter welding and cutting nozzle according to claim 1, characterized in that: First sealing rings (12) are provided at both ends of the flow regulating ring (3); first annular sealing grooves (13) are provided at the ends of the rear end valve body (202) and the rear end of the nozzle (4) that are in contact with the flow regulating ring (3); and the first sealing ring (12) is embedded in the first annular sealing groove (13).

9. The adjustable inner diameter welding and cutting nozzle according to claim 1, characterized in that: The end where the front end valve body (201) and the front end of the nozzle (1) are fitted together is respectively provided with a second sealing ring (14) and a second sealing groove (15), and the second sealing ring (14) is embedded in the second sealing groove (15).

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