Auxiliary welding device for environment monitor shell

Abstract

An environment monitor shell welding auxiliary device comprises a plasma welding main body mechanism, a cooling protection mechanism and an arc striking prevention mechanism, the plasma welding main body mechanism can conduct welding operation on a to-be-welded part, and the cooling protection mechanism is arranged at the bottom of the plasma welding main body mechanism; the cooling protection mechanism carries out cooling operation in the plasma welding process of the plasma welding main body mechanism, so that part of parts of the plasma welding main body mechanism are prevented from being damaged due to high temperature, and an arc striking prevention mechanism is arranged in the plasma welding main body mechanism; the arc striking prevention mechanism can protect an arc striking point of the plasma welding main body mechanism after the plasma welding main body mechanism completes arc striking, the arc splitting phenomenon in the subsequent welding process is prevented, and the plasma welding main body mechanism comprises a plasma nozzle, a contact tube mounting table, a contact tube and a tungsten electrode.

Description

Technical Field

[0001] This invention relates to the field of plasma welding, and more particularly to an auxiliary device for welding the housing of an environmental monitoring instrument. Background Technology

[0002] The existing environmental monitoring instrument casing requires welding. An existing patent (publication number: CN114309905B) proposes a welding device, including a plasma welding head. The annular opening of the plasma welding head is surrounded by a flow guide platform and an outer cover assembly. The outer cover assembly includes an active cover layer and a containment cover layer. The active cover layer is composed of multiple flap plates surrounding the outer ring of the flow guide platform. However, in this device, "the flow guide platform is fixedly installed at the bottom opening of the plasma gas channel and the center of the flow guide platform has a vertical hole communicating with the plasma gas channel." During the welding process, the tungsten electrode rod may generate arc splitting with the flow guide platform and other structures, causing the arc to jump and drift, thereby affecting the continuity and uniformity of the weld seam of the environmental monitoring instrument casing. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, this invention provides an auxiliary welding device for the housing of an environmental monitoring instrument. This device provides an insulating shielding block that shields the arc-starting block after welding begins. Due to the insulating effect between the bottom-insulated welding nozzle and the insulating shielding block, the tungsten electrode will not generate arc splitting during welding after the arc-starting block is shielded, thus preventing arc jumping and drifting from affecting the continuity and uniformity of the weld.

[0004] The objective of this invention is achieved through the following technical solution: An auxiliary device for welding the casing of an environmental monitoring instrument includes a plasma welding main body, a cooling and protection mechanism, and an anti-arc ignition mechanism. The plasma welding main body can perform welding operations on the parts to be welded. The cooling and protection mechanism is provided at the bottom of the plasma welding main body to cool down the parts during the plasma welding process, preventing damage to some parts of the plasma welding main body due to high temperature. The anti-arc ignition mechanism is provided inside the plasma welding main body to protect the arc ignition point of the plasma welding main body after the arc is ignited, preventing arc splitting in subsequent welding processes.

[0005] The plasma welding main body includes a plasma nozzle, a conductive nozzle mounting platform, a conductive nozzle, and a tungsten electrode. The top of the plasma welding main body has an upper nozzle mating groove, which is adapted to the plasma nozzle and connected to it. The upper nozzle mating groove is fixed to the outside of the plasma nozzle. The bottom of the plasma nozzle has a plasma nozzle outlet. Inside the plasma nozzle is a conductive nozzle mounting platform, which is adapted to the conductive nozzle and connected to it. The conductive nozzle is inserted into and fixed inside the conductive nozzle mounting platform. The tungsten electrode is adapted to the conductive nozzle and connected to it. The tungsten electrode is inserted into and fixed inside the conductive nozzle. The side of the plasma welding main body has an inert gas pipe connection port, into which an inert gas supply pipe is inserted and fixed. The bottom of the plasma welding main body has a nozzle connection screw groove. A bottom protective nozzle is provided at the bottom of the plasma welding main body, and a nozzle connection thread is located at the top of the bottom protective nozzle. The nozzle connection thread is threadedly connected to the nozzle connection screw groove.

[0006] The cooling protection mechanism includes a coolant output pipe, a coolant inlet pipe, and a cooling agitator. The bottom protective nozzle housing has an inner cooling groove that is adapted to the cooling agitator. The inner cooling groove is connected to the cooling agitator, and the cooling agitator rotates inside the inner cooling groove. The cooling agitator consists of an upper cooling block positioning ring and cooling agitator claws. The cooling agitator claws are located at the bottom of the upper cooling block positioning ring, and multiple sets of cooling agitator claws are evenly arranged around the central axis of the upper cooling block positioning ring. The cooling agitator claws have a spiral structure in general. The side of the cooling agitator claw facing the top has a turbulence groove. The bottom of the cooling agitator claw is a certain distance from the bottom of the inner cooling groove. The inner side of the cooling agitator has a cooling block positioning groove, and the inner cooling groove has a cooling block positioning ring. The cooling block positioning ring is adapted to the cooling block positioning groove and is connected to the cooling block positioning groove. The cooling block positioning groove slides outside the cooling block positioning ring.

[0007] Beneficial effects: 1. The present invention uses a cooling stirring block set inside the inner cooling tank. When the coolant enters through the coolant inlet pipe, the side of the cooling stirring claw with the turbulence groove is subjected to greater force due to the obstruction effect of the turbulence groove on the coolant. This causes the cooling stirring block to rotate as a whole, allowing the newly entered coolant to be distributed more quickly inside the inner cooling tank. It also avoids the accumulation of some old coolant inside the inner cooling tank, which affects the cooling effect in local areas. This makes the cooling inside the inner cooling tank more uniform. It also prevents the bottom protective nozzle from being misaligned with the axis of the tungsten electrode due to uneven heating during the welding process, which would cause the weld seam of the environmental monitoring instrument shell to be uneven, discontinuous, and uneven after the precision welding process.

[0008] 2. The cooling stirring claw of the present invention divides the interior of the inner cooling tank into independent spaces. By designing a certain distance between the bottom of the cooling stirring claw and the bottom of the inner cooling tank, each independent space is connected only by its bottom. This ensures that when the coolant flows inside the inner cooling tank, most of it passes through the bottom of the inner cooling tank, thereby achieving targeted cooling of the bottom of the inner cooling tank and avoiding ablation of the bottom insulation welding nozzle closest to the welding point.

[0009] 3. After welding begins, the insulating shielding block can shield the arc-starting block. Due to the insulation effect between the bottom insulating welding nozzle and the insulating shielding block, the tungsten electrode will not generate arc splitting during the welding process after the arc-starting block is shielded, thus avoiding arc jumping and drifting that affect the continuity and uniformity of the weld.

[0010] 4. The protective drive cylinder of the present invention is provided with a pressure relief rod on its side. When the high-temperature hydraulic oil inside the protective drive cylinder expands thermally, if the insulating shielding block has already moved to its limit position, the pressure relief rod will extend outward to prevent the excessively expanded high-temperature hydraulic oil from cracking the protective drive cylinder and to ensure the stability of the protective drive cylinder in use. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of an auxiliary device for welding the outer shell of an environmental monitoring instrument according to the present invention.

[0012] Figure 2 This is a partial side cross-sectional view of an auxiliary device for welding the housing of an environmental monitoring instrument according to the present invention.

[0013] Figure 3 As described in this invention Figure 2 Enlarged view A.

[0014] Figure 4 As described in this invention Figure 2 Enlarged view B.

[0015] Figure 5 As described in this invention Figure 4 Enlarged view C.

[0016] Figure 6 This is a partial structural diagram of an auxiliary device for welding the outer shell of an environmental monitoring instrument according to the present invention.

[0017] Figure 7 This is a diagram showing the installation state of the protective drive cylinder described in this invention.

[0018] Figure 8 This is a schematic diagram of the plasma welding main structure described in this invention.

[0019] Figure 9 This is a diagram of the internal structure of the plasma welding main body mechanism described in this invention.

[0020] Figure 10 This is a schematic diagram of the bottom protective nozzle structure described in this invention.

[0021] Figure 11 This is a diagram of the internal structure of the bottom protective nozzle described in this invention.

[0022] Figure 12 This is a schematic diagram of the cooling and stirring block structure described in this invention.

[0023] Figure 13 This is a schematic diagram of the insulating protective ring structure described in this invention.

[0024] In the diagram: 1. Plasma welding main body; 2. Cooling and protection mechanism; 3. Anti-arc ignition mechanism; 4. Plasma nozzle; 5. Conductive nozzle mounting platform; 6. Conductive nozzle; 7. Tungsten electrode; 8. Bottom protective nozzle; 9. Inert gas pipe connection port; 10. Inert gas supply pipe; 11. Coolant outlet; 12. Coolant outlet pipe; 13. Coolant inlet; 24. Coolant inlet pipe; 25. Nozzle connection thread groove; 26. Top liquid supply tank; 27. Nozzle connection thread; 28. Inner cooling tank; 29. ​​Cold... 26. Stirring block; 27. Cooling block positioning ring; 28. Cooling block positioning groove; 29. ​​Liquid supply docking groove; 30. Plasma nozzle; 31. Arc ignition block connecting groove; 32. Arc ignition block; 33. Insulating protective ring; 34. Insulating shielding block; 35. Protective ring driven arm; 36. Protective drive cylinder; 37. Turbulence groove; 38. Pressure relief rod connecting groove; 39. Pressure relief rod; 40. Spring connector; 41. Protective ring driven crank rod; 42. Inner oil tank; 43. Upper nozzle docking groove; 151. Bottom insulating welded nozzle; 261. Upper cooling block positioning ring; 262. Cooling stirring claw; Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments: Example 1: An auxiliary welding device for the housing of an environmental monitoring instrument includes a plasma welding main body 1, a cooling and protection mechanism 2, and an anti-arc ignition mechanism 3. The plasma welding main body 1 can perform welding operations on the parts to be welded. The cooling and protection mechanism 2 is provided at the bottom of the plasma welding main body 1. The cooling and protection mechanism 2 performs cooling operations during the plasma welding process of the plasma welding main body 1 to prevent some parts of the plasma welding main body 1 from being damaged due to high temperature. The anti-arc ignition mechanism 3 is provided inside the plasma welding main body 1. The anti-arc ignition mechanism 3 can protect the arc ignition point of the plasma welding main body 1 after the arc is ignited, to prevent arc splitting in the subsequent welding process.

[0026] Example 2: The plasma welding main body mechanism 1 of the present invention includes a plasma nozzle 11, a conductive nozzle mounting platform 12, a conductive nozzle 13, and a tungsten electrode 14. The top of the plasma welding main body mechanism 1 has an upper nozzle docking groove 43, which is adapted to the plasma nozzle 11 and connected to it. The upper nozzle docking groove 43 is fixed to the outside of the plasma nozzle 11. The bottom of the plasma nozzle 11 has a plasma nozzle 30. The conductive nozzle mounting platform 12 is located inside the plasma nozzle 11, and the conductive nozzle 13 is adapted to and connected to the conductive nozzle mounting platform 12. The conductive nozzle 13 is inserted into the conductive nozzle mounting platform 12 and fixed. The tungsten electrode 14 is adapted to the conductive nozzle 13 and is connected to the conductive nozzle 13. The tungsten electrode 14 is inserted into the conductive nozzle 13 and fixed. The side of the plasma welding main body 1 has an inert gas pipe connection port 16. The inert gas supply pipe 17 is inserted into the inert gas pipe connection port 16 and fixed. The bottom of the plasma welding main body 1 has a nozzle connection screw groove 22. The bottom of the plasma welding main body 1 is provided with a bottom protective nozzle 15. The top of the bottom protective nozzle 15 has a nozzle connection thread 24. The nozzle connection thread 24 is threadedly connected to the nozzle connection screw groove 22.

[0027] Example 3: The cooling protection mechanism 2 of this invention includes a coolant output pipe 19, a coolant inlet pipe 21, and a cooling stirring block 26. The bottom protective nozzle 15 housing has an inner cooling groove 25, which is adapted to the cooling stirring block 26 and connected to it. The cooling stirring block 26 rotates within the inner cooling groove 25. The cooling stirring block 26 is composed of an upper cooling block positioning ring 261 and cooling stirring claws 262. The cooling stirring claws 262 are located at the bottom of the upper cooling block positioning ring 261, and multiple sets of cooling stirring claws 262 are evenly arranged around the central axis of the upper cooling block positioning ring 261. The cooling stirring claws 262 have a generally spiral structure. The side of the cooling stirring claw 262 facing the top has a turbulence groove 37. The bottom of the cooling stirring claw 262 is a certain distance from the bottom of the inner cooling groove 25. The inner side of the cooling stirring block 26 has a cooling block positioning groove 28. The 5 has a cooling block positioning ring 27 inside, which is adapted to the cooling block positioning groove 28. The cooling block positioning ring 27 is connected to the cooling block positioning groove 28, and the cooling block positioning groove 28 slides outside the cooling block positioning ring 27. The top of the bottom protective nozzle 15 has a liquid supply docking groove 29. Multiple sets of liquid supply docking grooves 29 are evenly surrounded around the outside of the nozzle connecting thread 24. The plasma welding main body 1 has two sets of top liquid supply grooves 23 inside the housing. The two sets of top liquid supply grooves 23 are symmetrically distributed on both sides of the plasma welding main body 1. One side of the top liquid supply groove 23 has a coolant outlet 18. The coolant outlet pipe 19 is inserted into the coolant outlet 18 and fixed. The other side of the top liquid supply groove 23 has a coolant inlet 20. The coolant inlet pipe 21 is inserted into the coolant inlet 20 and fixed. The bottom opening of the top liquid supply groove 23 corresponds to the position of the liquid supply docking groove 29.

[0028] It should be noted that: through the cooling stirring block 26 set inside the inner cooling tank 25, when the coolant enters through the coolant inlet pipe 21, due to the blocking effect of the turbulence groove 37 on the coolant, the side of the cooling stirring claw 262 with the turbulence groove 37 is subjected to greater force, thereby pushing the cooling stirring block 26 to rotate as a whole. This allows the newly entered coolant to be distributed more quickly inside the inner cooling tank 25, and also avoids some old coolant accumulating inside the inner cooling tank 25 and affecting the cooling effect in local areas. This makes the cooling inside the inner cooling tank 25 more uniform, and prevents the bottom protective nozzle 15 from being misaligned with the axis of the tungsten electrode 14 due to uneven heating during the welding process. This would prevent the weld seam of the environmental monitoring instrument shell from being uneven, discontinuous, or uneven after the precision welding process.

[0029] It should be noted that the cooling stirring claw 262 divides the interior of the inner cooling tank 25 into independent spaces. By designing a certain distance between the bottom of the cooling stirring claw 262 and the bottom of the inner cooling tank 25, each independent space is connected only by its bottom. This ensures that when the coolant flows inside the inner cooling tank 25, most of it passes through the bottom of the inner cooling tank 25, thereby achieving targeted cooling of the bottom of the inner cooling tank 25 and preventing the bottom insulation welding nozzle 151, which is closest to the welding point, from being ablated.

[0030] Example 4: The anti-arc-initiating mechanism 3 of this invention includes an arc-initiating block 32, an insulating protective ring 33, a protective drive cylinder 36, and a pressure relief rod 39. The bottom protective nozzle 15 has a bottom insulating welding nozzle 151 at its bottom. The insulating protective ring 33 is adapted to the bottom protective nozzle 15 and is connected to it. The insulating protective ring 33 rotates inside the bottom protective nozzle 15. The bottom of the insulating protective ring 33 has an insulating shielding block 34, which is adapted to the bottom insulating welding nozzle 151. The shielding block 34 connects to the bottom insulating welding nozzle 151 and rotates inside the bottom insulating welding nozzle 151. The top of the bottom insulating welding nozzle 151 has an arc-starting block connecting groove 31. Multiple sets of arc-starting block connecting grooves 31 are evenly arranged around the central axis of the bottom insulating welding nozzle 151. The arc-starting block 32 is adapted to the arc-starting block connecting groove 31 and is connected to the arc-starting block connecting groove 31. The arc-starting block 32 is inserted into the arc-starting block connecting groove 31 and fixed. The top of the insulating protective ring 33 has a protective... A ring driven arm 35, with multiple sets of protective ring driven arms 35 evenly arranged around the central axis of the insulating protective ring 33, has a protective ring driven crank 41 on its side. A protective drive cylinder 36 is fixedly connected to the inner side of the bottom protective nozzle 15. The protective drive cylinder 36 has a slender structure, with multiple sets of protective drive cylinders 36 evenly arranged around the central axis of the bottom protective nozzle 15. The protective drive cylinder 36 has an inner oil reservoir 42, which is adapted to the protective ring driven crank 41. The inner oil reservoir 42 is connected to... The protective ring driven crank 41 slides inside the inner oil tank 42, which is filled with high-temperature resistant hydraulic oil. The protective drive cylinder 36 has a pressure relief rod connecting groove 38 on its side, which is adapted to the pressure relief rod 39. The pressure relief rod connecting groove 38 connects to the pressure relief rod 39, which slides inside the pressure relief rod connecting groove 38. The end of the pressure relief rod 39 has a spring connector 40, which is connected to the protective drive cylinder 36 by a spring.

[0031] Further: An operating method for a welding auxiliary device for an environmental monitoring instrument housing includes the following steps: First, when the plasma welding operation begins, plasma gas is ejected from inside the plasma nozzle 11, and simultaneously, coolant is injected into the inner cooling tank 25 through the coolant inlet pipe 21. As the coolant flows within the inner cooling tank 25, it simultaneously drives the cooling stirring block 26 to rotate, accelerating the flow of coolant within the inner cooling tank 25 and making the coolant distribution more uniform. Simultaneously, inert gas is injected into the plasma welding main body 1 through the inert gas supply pipe 17 and finally ejected from the bottom outlet of the bottom protective nozzle 15. Second, the conductive nozzle 13 and the arc-starting block 32... When the power is turned on, an electric arc is generated between the bottom of the tungsten electrode 14 and the arc-starting block 32. After the arc is generated, the power between the conductive nozzle 13 and the workpiece is turned on, so that the arc is transferred between the tungsten electrode 14 and the workpiece. The power between the conductive nozzle 13 and the arc-starting block 32 is cut off, and the arc is established. Some of the heat generated during the plasma cutting process causes the high-temperature resistant hydraulic oil inside the protective drive cylinder 36 to expand due to heat, which gradually pushes the protective ring out of the driven crank 41, so that the insulating shielding block 34 gradually covers the outside of the arc-starting block 32, so as to prevent the arc-starting block 32 from being contaminated by the metal vapor generated during the welding process and affecting the subsequent arc-starting operation. It can also prevent the arc from splitting between the tungsten electrode 14 and the arc-starting block 32, which would affect the welding effect.

[0032] It should be noted that after welding begins, the insulating shielding block 34 can shield the arc-starting block 32. Due to the insulation effect of the bottom insulating welding nozzle 151 and the insulating shielding block 34, the tungsten electrode 14 will not generate arc splitting during the welding process after the arc-starting block 32 is shielded, thus avoiding arc jumping and drifting that affect the continuity and uniformity of the weld.

[0033] It should be noted that in existing technologies, the arc-starting block is easily contaminated by welding metal vapors, leading to subsequent arc-starting failures and requiring frequent disassembly and cleaning. In this application, the insulating shielding block 34, insulating protective ring 33, and arc-starting block 32 work together. When the insulating shielding block 34 rotates under the drive of the protective drive cylinder 36, its edge forms slight friction with the surface of the arc-starting block 32, scraping away the attached metal vapor deposits and oxide scale like a scraper, achieving self-cleaning of the arc-starting block. Simultaneously, the rotation of the insulating protective ring 33 causes the insulating shielding block 34 to repeatedly wipe the surface of the arc-starting block, ensuring the cleanliness of the exposed surface. The success rate of repeated arc-starting is increased from 70% in existing technologies to 98%, eliminating the need for machine shutdown for disassembly and cleaning, extending the maintenance cycle by three times. This is particularly suitable for batch continuous welding operations, significantly improving production efficiency. Simultaneously, the bottom-insulated welding nozzle 151, plasma nozzle 30, and cooling stirring block 26 work together. The insulation properties of the bottom-insulated welding nozzle 151 not only prevent arc splitting but also form an arc focusing channel. The insulation material prevents the arc from scattering to the surrounding area, concentrating the arc energy in the center of the weld. The heat-affected zone of the weld is reduced by 20%, reducing the deformation of the workpiece shell of the environmental monitoring instrument, achieving arc focusing and spatter suppression, and simplifying subsequent cleaning procedures.

[0034] It should be noted that a pressure relief rod 39 is provided on the side of the protective drive cylinder 36. When the high-temperature hydraulic oil inside the protective drive cylinder 36 expands thermally, if the insulating shielding block 34 has already moved to its limit position, the pressure relief rod 39 will extend outward to prevent the excessively expanded high-temperature hydraulic oil from cracking the protective drive cylinder 36 and to ensure the stability of the protective drive cylinder 36 in use.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A welding auxiliary device for the housing of an environmental monitoring instrument, characterized in that: The system includes a plasma welding main body (1), a cooling protection mechanism (2), and an anti-arc mechanism (3). The plasma welding main body (1) performs welding operations on the parts to be welded. The plasma welding main body (1) is equipped with a cooling protection mechanism (2) at the bottom. The cooling protection mechanism (2) performs cooling operations during the plasma welding process of the plasma welding main body (1) to prevent some parts of the plasma welding main body (1) from being damaged due to high temperature. The plasma welding main body (1) is equipped with an anti-arc mechanism (3) inside. The anti-arc mechanism (3) can protect the arc ignition point of the plasma welding main body (1) after the arc is ignited, to prevent arc splitting in the subsequent welding process.

2. The auxiliary device for welding the housing of an environmental monitoring instrument according to claim 1, characterized in that: The plasma welding main body (1) includes a plasma nozzle (11), a conductive nozzle mounting platform (12), a conductive nozzle (13), and a tungsten electrode (14). The plasma welding main body (1) has an upper nozzle docking groove (43) at the top. The plasma nozzle (11) is adapted to the upper nozzle docking groove (43). The plasma nozzle (11) is connected to the upper nozzle docking groove (43). The upper nozzle docking groove (43) is fixed on the outside of the plasma nozzle (11). The plasma nozzle (11) has a plasma nozzle (30) at the bottom. The plasma nozzle (11) has a conductive nozzle mounting platform (12) inside. The conductive nozzle (13) is adapted to the conductive nozzle mounting platform (12). The conductive nozzle (13) is connected to the conductive nozzle mounting platform (12). The conductive nozzle (13) is inserted into the conductive nozzle mounting platform (12) and fixed. The tungsten electrode (14) is adapted to the conductive nozzle (13). The tungsten electrode (14) is connected to the conductive nozzle (13). The tungsten electrode (14) is inserted into the conductive nozzle (13) and fixed.

3. The auxiliary device for welding the housing of an environmental monitoring instrument according to claim 2, characterized in that: The plasma welding main body (1) has an inert gas pipe connection port (16) on the side. An inert gas supply pipe (17) is inserted into the inert gas pipe connection port (16) and fixed. The plasma welding main body (1) has a nozzle connection screw groove (22) at the bottom. A bottom protection nozzle (15) is provided at the bottom of the plasma welding main body (1). The bottom protection nozzle (15) has a nozzle connection thread (24) at the top. The nozzle connection thread (24) is threadedly connected to the nozzle connection screw groove (22).

4. The auxiliary device for welding the housing of an environmental monitoring instrument according to claim 1, characterized in that: The cooling protection mechanism (2) includes a coolant output pipe (19), a coolant inlet pipe (21), and a cooling stirring block (26). The bottom protection nozzle (15) has an inner cooling groove (25) inside its housing. The inner cooling groove (25) is adapted to the cooling stirring block (26). The inner cooling groove (25) is connected to the cooling stirring block (26). The cooling stirring block (26) rotates inside the inner cooling groove (25). The cooling stirring block (26) is composed of an upper cooling block positioning ring (261) and a cooling stirring claw (262). The cooling stirring claw (262) is located at the bottom of the upper cooling block positioning ring (261). Multiple sets of cooling stirring claws (262) are evenly arranged around the central axis of the upper cooling block positioning ring (261). The cooling stirring claw (262) is generally spiral in structure. The cooling stirring claw (262) has a turbulence groove (37) on the side facing the top. The bottom of the cooling stirring claw (262) is a certain distance from the bottom of the inner cooling groove (25).

5. The auxiliary device for welding the housing of an environmental monitoring instrument according to claim 4, characterized in that: The inner side of the cooling stirring block (26) has a cooling block positioning groove (28), and the inner cooling groove (25) has a cooling block positioning ring (27). The cooling block positioning ring (27) is adapted to the cooling block positioning groove (28). The cooling block positioning ring (27) is connected to the cooling block positioning groove (28). The cooling block positioning groove (28) slides on the outside of the cooling block positioning ring (27). The top of the bottom protective nozzle (15) has a liquid supply docking groove (29). Multiple sets of liquid supply docking grooves (29) are evenly surrounded on the outside of the nozzle connection thread (24).

6. The auxiliary device for welding the housing of an environmental monitoring instrument according to claim 5, characterized in that: The plasma welding main body (1) has two sets of top liquid supply tanks (23) inside the shell. The two sets of top liquid supply tanks (23) are symmetrically distributed on both sides of the plasma welding main body (1). One side of the top liquid supply tank (23) has a coolant outlet (18) on the side. The coolant outlet pipe (19) is inserted into the coolant outlet (18) and fixed. The other side of the top liquid supply tank (23) has a coolant inlet (20) on the side. The coolant inlet pipe (21) is inserted into the coolant inlet (20) and fixed. The bottom opening of the top liquid supply tank (23) corresponds to the position of the liquid supply docking groove (29).

7. The auxiliary device for welding the housing of an environmental monitoring instrument according to claim 1, characterized in that: The anti-arc mechanism (3) includes an arc-inducing block (32), an insulating protective ring (33), a protective drive cylinder (36), and a pressure relief rod (39). The bottom protective nozzle (15) has a bottom insulating welding nozzle (151) at its bottom. The insulating protective ring (33) is adapted to the bottom protective nozzle (15) and is connected to the bottom protective nozzle (15). The insulating protective ring (33) rotates inside the bottom protective nozzle (15). The bottom of the insulating protective ring (33) has an insulating shielding block (34) and is adapted to the bottom insulating welding nozzle (151). The insulating shielding block (34) is connected to the bottom insulating welding nozzle (151) and rotates inside the bottom insulating welding nozzle (151).

8. The auxiliary device for welding the housing of an environmental monitoring instrument according to claim 7, characterized in that: The bottom insulating welding nozzle (151) has an arc-starting block connecting groove (31) at the top. Multiple sets of arc-starting block connecting grooves (31) are evenly arranged around the central axis of the bottom insulating welding nozzle (151). The arc-starting block (32) is adapted to the arc-starting block connecting groove (31). The arc-starting block (32) is connected to the arc-starting block connecting groove (31). The arc-starting block (32) is inserted into the arc-starting block connecting groove (31) and fixed.

9. The auxiliary device for welding the housing of an environmental monitoring instrument according to claim 8, characterized in that: The top of the insulating protective ring (33) has a protective ring driven arm (35), and multiple sets of protective ring driven arms (35) are evenly arranged around the central axis of the insulating protective ring (33). The side of the protective ring driven arm (35) has a protective ring driven crank (41). The inner side of the bottom protective nozzle (15) is fixedly connected to the protective drive cylinder (36). The protective drive cylinder (36) has a slender structure, and multiple sets of protective drive cylinders (36) are evenly arranged around the central axis of the bottom protective nozzle (15). The inside of the protective drive cylinder (36) has an inner oil tank (42). The inner oil tank (42) is adapted to the protective ring driven crank (41). The inner oil tank (42) is connected to the protective ring driven crank (41). The protective ring driven crank (41) slides inside the inner oil tank (42). The inner oil tank (42) is filled with high-temperature resistant hydraulic oil.

10. The auxiliary device for welding the housing of an environmental monitoring instrument according to claim 9, characterized in that... The protective drive cylinder (36) has a pressure relief rod connecting groove (38) on its side. The pressure relief rod connecting groove (38) is adapted to the pressure relief rod (39). The pressure relief rod connecting groove (38) connects to the pressure relief rod (39). The pressure relief rod (39) slides inside the pressure relief rod connecting groove (38). The end of the pressure relief rod (39) has a spring connector (40). The spring connector (40) is connected to the protective drive cylinder (36) by a spring.

Images