Welding device for seat ring and volute of water turbine

Abstract

The invention discloses a welding device for a seat ring and a volute of a water turbine. The machine shell is welded; the power supply unit is fixed in the welding machine shell; the cooling fan is fixed in the welding machine shell and is positioned above the power supply unit; the air inlet is formed in the top face of the welding machine shell and located above the cooling fan. The air outlet is formed in the bottom surface of the welding machine shell and is positioned below the power supply unit; the air inlet baffle is arranged on the inner top face of the welding machine shell and matched with the air inlet, and the air inlet baffle is movably connected with the welding machine shell; the air outlet baffle is arranged on the inner low surface of the welding machine shell and matched with the air outlet, and the air outlet baffle is movably connected with the welding machine shell; and the baffle driving structure is arranged in the welding machine shell and connected with the air inlet baffle and the air outlet baffle, and the baffle driving structure is connected with the cooling fan. The welding machine has the beneficial effect that internal parts of the welding machine can be protected.

Description

Technical Field

[0001] The invention relates to the technical field related to water turbine welding, in particular to a welding device for a water turbine seat ring and a volute. Background Art

[0002] A water turbine is a machine that converts water energy into rotational mechanical energy, thereby driving a generator to generate electrical energy. It is one of the power equipment of a hydropower station. The seat ring and volute are the two major components of the embedded part of the water turbine. They are both the basic parts of the unit and the components of the flow-through parts of the unit. They bear the water pressure distribution load that changes with the operating conditions of the unit and the force transmitted from the top cover.

[0003] At present, due to transportation restrictions, the volute of the turbine generally needs to be welded to the turbine seat ring on site at the power station site. Dust, moisture or mosquitoes on the power station site can easily enter the inside of the welding machine through the heat dissipation port of the welding machine and affect its normal operation, resulting in a significant reduction in the service life of the welding machine.

[0004] In summary, there is a need for a welding device for a turbine seat ring and a volute that can protect the internal parts of the welding machine. Summary of the invention

[0005] The present invention aims to overcome the shortcomings of the prior art that dust, moisture or mosquitoes on the construction site can easily enter the interior of the welding machine through the heat dissipation port of the welding machine and affect its normal operation, resulting in a greatly reduced service life of the welding machine. A welding device for a turbine seat ring and a volute that can protect the internal parts of the welding machine is provided.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A welding device for a turbine seat ring and a volute, comprising: Welding machine housing; A power supply unit is fixed inside the welding machine housing; A cooling fan is fixed inside the welding machine housing and is located above the power supply unit; An air inlet is arranged on the top surface of the welding machine housing and is located above the cooling fan; An air outlet is arranged on the bottom surface of the welding machine housing and is located below the power supply unit; An air inlet baffle is arranged on the inner top surface of the welding machine housing and matches the air inlet, and the air inlet baffle is movably connected to the welding machine housing; An air outlet baffle is arranged on the inner lower surface of the welding machine housing and matches the air outlet, and the air outlet baffle is movably connected to the welding machine housing; The baffle driving structure is arranged inside the welding machine housing and connected to the air inlet baffle and the air outlet baffle. The baffle driving structure is connected to the cooling fan.

[0007] When the welding machine is in a shutdown state, the air inlet baffle is blocked at the air inlet, and the air outlet baffle is blocked at the air outlet, which can prevent dust, moisture or mosquitoes on the construction site from entering the welding machine housing through the air inlet or air outlet and affecting the working life of internal parts, thereby improving the protection of the internal parts of the welding machine; when the welding machine is working, the cooling fan blows air to dissipate heat to the power unit. During the rotation of the cooling fan, the baffle driving structure will be driven to work synchronously, and the air inlet baffle and the air outlet baffle will be controlled by the baffle driving structure to move, so that the air inlet baffle is automatically moved away from the air inlet, and the air outlet baffle is automatically moved away from the air outlet. At this time, the external wind will be sucked in from the air inlet under the negative pressure of the cooling fan, and blown to the power unit, taking away the working heat of the power unit and discharging it through the air outlet, thereby achieving heat dissipation and cooling of the power unit.

[0008] Preferably, a baffle slide groove 1 is provided on the inner top surface of the welding machine housing, the air inlet baffle is mounted on the baffle slide groove 1 and is slidably connected thereto, the air inlet is located on the bottom surface of the baffle slide groove 1, a baffle slide groove 2 is provided on the inner bottom surface of the welding machine housing, the air outlet baffle is mounted on the baffle slide groove 2 and is slidably connected thereto, and the air outlet is located on the bottom surface of the baffle slide groove 2. The design of the baffle slide groove 1 facilitates the installation of the air inlet baffle on the inner top surface of the welding machine housing, and at the same time, it guides the movement of the air inlet baffle, thereby improving the movement accuracy; the design of the baffle slide groove 2 facilitates the installation of the air outlet baffle on the inner bottom surface of the welding machine housing, and at the same time, it guides the movement of the air outlet baffle, thereby improving the movement accuracy.

[0009] Preferably, a unit frame is fixed on the inner bottom surface of the welding machine housing, the power unit is fixed on the unit frame, a fan frame is fixed on the inner wall of the welding machine housing, the heat dissipation fan is installed on the fan frame, a fan shaft is arranged on the heat dissipation fan, a motor is also fixed on the inner wall of the welding machine housing, a motor shaft is arranged on the motor, and the motor shaft and the fan shaft are connected by a gear set. The heat dissipation fan is installed in the welding machine housing through the fan frame, with a simple structure and convenient installation. The motor shaft on the motor transmits motion to the fan shaft through the gear set, thereby driving the heat dissipation fan to work, with a simple structure and convenient control.

[0010] Preferably, the baffle driving structure includes a transmission shaft installed inside the welding machine housing, the transmission shaft and the welding machine housing are rotatably connected, the transmission shaft and the fan shaft are connected by a transmission belt 1, the air inlet baffle is fixed on the transmission belt 1, a driven shaft is installed on the inner bottom surface of the welding machine housing, the driven shaft is placed on the side of the unit frame, the driven shaft is rotatably connected to the welding machine housing, the driven shaft and the transmission shaft are connected by a transmission belt 2, and the air outlet baffle is fixed on the transmission belt 2. When the cooling fan starts working, the rotating fan shaft will synchronously drive the transmission belt 1 to move. Since the air inlet baffle is fixed on the transmission belt 1, the air inlet baffle will move with the transmission belt 1, thereby automatically moving away from the air inlet. At the same time, under the transmission action of the transmission shaft, the transmission belt 2 will also start to move synchronously. Since the air outlet baffle is fixed on the transmission belt 2, the air outlet baffle will move with the transmission belt 2, thereby automatically moving away from the air outlet. The structure is simple, the control is convenient, and the degree of automation is high.

[0011] Preferably, a transmission sleeve is installed on the fan shaft, the transmission sleeve is sleeved on the fan shaft and rotatably connected with it, a movable pin slide groove is provided on the side wall of the fan shaft, a movable pin is slidably connected in the movable pin slide groove, one end of the movable pin is connected to the bottom surface of the movable pin slide groove by a movable pin spring, a movable pin slot matching the other end of the movable pin is provided on the inner side wall of the transmission sleeve, a pulley is also provided on the transmission sleeve, the pulley is sleeved on the outer side of the transmission sleeve and rotatably connected with it, a friction layer is provided on the contact surface between the transmission sleeve and the pulley, a baffle spring is provided in the baffle slide groove 1, one end of the baffle spring is connected to the groove wall of the baffle slide groove 1, and the other end of the baffle spring is connected to the plate wall of the air inlet baffle. When the fan shaft rotates, the movable pin in the movable pin slot will automatically extend out of the movable pin slot under the action of centrifugal force and be inserted into the movable pin slot, so that the transmission sleeve can rotate synchronously with the fan shaft. Since a friction layer is provided between the pulley and the transmission sleeve, the pulley will also rotate with the transmission sleeve under the action of static friction, thereby driving the transmission belt and the air inlet baffle thereon to move. At this time, the baffle spring is gradually compressed. When the elastic force of the baffle spring on the air inlet baffle and the static friction between the pulley and the transmission sleeve are balanced, the static friction between the pulley and the transmission sleeve will change into dynamic friction. The dynamic friction between the pulley and the transmission sleeve can maintain the stability of the air inlet baffle and prevent the air inlet baffle from moving back, thereby ensuring that the air inlet can always be in an open state. When the cooling fan stops, the fan shaft stops rotating. At this time, the movable pin will automatically withdraw from the movable pin slot under the reset action of the movable pin spring, so that the connection between the fan shaft and the transmission sleeve is disconnected. At this time, the air inlet baffle will automatically move back and block the air inlet again under the push of the reset elastic force of the baffle spring, and the return of the air inlet baffle will also drive the automatic reset of transmission belt 1 and transmission belt 2, so that the air outlet baffle will also automatically move back and block the air outlet again. The control is convenient and the degree of automation is high.

[0012] Preferably, a protective mesh cover is provided at the air inlet, and the protective mesh cover is fixed on the outer surface of the welding machine housing. The design of the protective mesh cover can prevent debris splashed on the construction site from entering the welding machine housing through the air inlet to damage the internal parts of the welding machine housing, thereby further protecting the internal parts of the welding machine.

[0013] Preferably, a power connector is fixed on the outer surface of the welding machine housing, the power connector is electrically connected to the power supply unit, a cover plate movable cavity is provided inside the power connector, a conductive column through hole is provided on the side wall on one side of the cover plate movable cavity, a conductive column slot is provided on the side wall on the other side of the cover plate movable cavity, the conductive column through hole and the conductive column slot are arranged oppositely, a torsion spring seat is also fixed on the side wall on one side of the cover plate movable cavity, the torsion spring seat is placed on the side of the conductive column through hole, a through-hole cover plate matching the conductive column through hole is installed on the torsion spring seat, and the through-hole cover plate and the torsion spring seat are rotatably connected. The power connector is used to connect the external electrode. When the welding machine is in the shutdown state, the through-hole cover plate in the cover plate movable cavity will automatically press on the conductive column through hole under the elastic force of the torsion spring seat to prevent dust, moisture or mosquitoes on the construction site from entering the power connector through the conductive column through hole and affecting the working life of the conductive connector, thereby improving the protection of the power connector.

[0014] Preferably, it also includes a handle portion, the handle portion is provided with an electrode connector, the electrode connector is provided with a connector slot matching the power connector, a connector limit block is fixed on the inner wall of the connector slot, an axial slide groove matching the connector limit block is provided on the outer wall of the power connector, the connector limit block and the axial slide groove are slidably connected, one end of the axial slide groove is located on the end surface of the power connector, and a horizontal slide groove matching the connector limit block is provided on the groove wall at the other end of the axial slide groove, and the connector limit block and the horizontal slide groove are slidably connected The slot wall of the horizontal slot is provided with a limit block slot matching the joint limit block, the limit block slot is placed on one side of the end face close to the power connector, the joint limit block and the limit block slot are connected, a compression spring is fixed on the bottom surface of the joint slot, a conductive column matching the conductive column through hole and the conductive column slot is fixed on the bottom surface of the joint slot, a conductive contact 1 is provided on the conductive column, and a conductive contact 2 matching the conductive contact 1 is provided on the side wall of the conductive column slot, and the conductive contact 2 is electrically connected to the power supply unit. A working electrode is provided on the handle part, and the handle part is electrically connected to the power supply unit inside the welding machine housing through the plug-in cooperation of the electrode connector and the power connector to supply power to the working electrode thereon. When plugging, align the joint limit block on the inner wall of the joint slot with the axial slot on the outer wall of the power connector, and then insert the power connector into the joint slot on the electrode connector. At this time, the conductive column on the bottom surface of the joint slot will also pass through the conductive column through hole to enter the interior of the power connector (the through hole cover at the conductive column through hole will be automatically pushed open by the conductive column). When the power connector is inserted to the bottom of the connector slot, the conductive column is just inserted to the bottom of the conductive column slot (the compression spring is compressed by the conductive column at this time), and the connector limit block in the axial slide groove is just moved to the position of the horizontal slide groove. Then the electrode connector is rotated, the connector limit block is transferred into the horizontal slide groove and the connector limit block is moved to the position of the limit block slot. Finally, the user releases the electrode connector, and the connector limit block will automatically snap into the limit block slot under the elastic force of the compression spring, thereby completing the plug-in fixation of the electrode connector and the power connector. The structure is simple, the operation is convenient, the fixing effect is good, and the electrode connector can be effectively prevented from being loosened from the power connector on the welding machine housing. After the electrode connector and the power connector are plugged in, the current of the power supply unit is transmitted to the working electrode on the handle through the conductive contact 2, the conductive contact 1 and the conductive column in turn.

[0015] Preferably, the side wall of the conductive column is provided with a cover plate limiting groove matching the through hole cover plate, and when the connector limiting block is inserted into the limiting block slot, the through hole cover plate is also pressed against the cover plate limiting groove, further improving the fixing effect of the electrode connector and the power connector.

[0016] Preferably, a handle is fixed on the top of the welding machine housing, and a universal movable wheel is installed on the bottom of the welding machine housing. The design of the universal movable wheel facilitates the movement of the welding machine, so that the welding machine can be quickly moved to a required position, thereby improving work efficiency. The design of the handle improves the convenience and comfort of use, and facilitates the user to push the welding machine.

[0017] The beneficial effects of the present invention are: improving the protection of the internal parts of the welding machine; improving the activity accuracy; simple structure, convenient control, and high degree of automation; improving the protection of the power connector; simple structure, convenient operation, and good fixing effect; and improving the convenience and comfort of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a top view of the welding machine housing; Figure 3 yes Figure 2 Sectional view at AA in the middle; Figure 4 yes Figure 3 Enlarged view of point C in the middle; Figure 5 yes Figure 2 The enlarged view of point B in the middle; Figure 6 It is a connection diagram of the power connector and the electrode connector; Figure 7 yes Figure 6 Cross-sectional view at DD in the middle.

[0019] In the figure: 1. welding machine housing, 2. power unit, 3. cooling fan, 4. air inlet, 5. air outlet, 6. air outlet baffle, 7. baffle slide slot 1, 8. baffle slide slot 2, 9. fan shaft, 10. transmission shaft, 11. transmission belt 1, 12. driven shaft, 13. transmission belt 2, 14. transmission sleeve, 15. movable pin slide slot, 16. movable pin, 17. movable pin slot, 18. pulley, 19. friction layer, 20. baffle spring, 21. protective mesh cover, 22. power connector, 23. cover plate movable cavity, 24. conductive column through hole, 25. conductive column slot, 26. torsion spring seat, 27. through-hole cover, 28. handle, 29. electrode connector, 30. connector slot, 31. connector limit block, 32. Axial slide groove, 33. Horizontal slide groove, 34. Limit block slot, 35. Compression spring, 36. Conductive column, 37. Conductive contact one, 38. Conductive contact two, 39. Cover plate limit slot, 40. Handle, 41. Universal movable wheel, 42. Air inlet baffle, 43. Movable pin spring. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figure 1 , Figure 2 and Figure 3 In the embodiment described, a welding device for a turbine seat ring and a volute includes: Welding machine housing 1; A power supply unit 2 is fixed inside the welding machine housing 1; A cooling fan 3 is fixed inside the welding machine housing 1 and is located above the power supply unit 2; The air inlet 4 is arranged on the top surface of the welding machine housing 1 and is located above the cooling fan 3; The air outlet 5 is arranged on the bottom surface of the welding machine housing 1 and is located below the power supply unit 2; The air inlet baffle 42 is arranged on the inner top surface of the welding machine housing 1 and matches the air inlet 4. The air inlet baffle 42 and the welding machine housing 1 are movably connected; The air outlet baffle 6 is arranged on the inner lower surface of the welding machine housing 1 and matches the air outlet 5. The air outlet baffle 6 and the welding machine housing 1 are movably connected; The baffle driving structure is arranged inside the welding machine housing 1 and connected to the air inlet baffle 42 and the air outlet baffle 6 . The baffle driving structure is connected to the cooling fan 3 .

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, a baffle slide groove 7 is provided on the inner top surface of the welding machine housing 1, the air inlet baffle 42 is installed on the baffle slide groove 7 and is slidably connected thereto, the air inlet 4 is located on the bottom surface of the baffle slide groove 7, a baffle slide groove 2 8 is provided on the inner bottom surface of the welding machine housing 1, the air outlet baffle 6 is installed on the baffle slide groove 2 8 and is slidably connected thereto, and the air outlet 5 is located on the bottom surface of the baffle slide groove 2 8.

[0023] like Figure 3 and Figure 4 As shown, a unit frame is fixed on the inner bottom surface of the welding machine housing 1, the power unit 2 is fixed on the unit frame, a fan frame is fixed on the inner wall of the welding machine housing 1, a cooling fan 3 is installed on the fan frame, a fan shaft 9 is provided on the cooling fan 3, a motor is also fixed on the inner wall of the welding machine housing 1, a motor shaft is provided on the motor, and the motor shaft and the fan shaft 9 are connected through a gear set.

[0024] The baffle driving structure includes a transmission shaft 10 installed inside the welding machine housing 1, the transmission shaft 10 is rotatably connected to the welding machine housing 1, the transmission shaft 10 and the fan shaft 9 are connected by a transmission belt 11, the air inlet baffle 42 is fixed on the transmission belt 11, a driven shaft 12 is installed on the inner bottom surface of the welding machine housing 1, the driven shaft 12 is placed on the side of the unit frame, the driven shaft 12 is rotatably connected to the welding machine housing 1, the driven shaft 12 and the transmission shaft 10 are connected by a transmission belt 13, and the air outlet baffle 6 is fixed on the transmission belt 13.

[0025] like Figure 3 and Figure 4 As shown, a transmission sleeve 14 is installed on the fan shaft 9, and the transmission sleeve 14 is sleeved on the fan shaft 9 and rotatably connected thereto. A movable pin slot 15 is provided on the side wall of the fan shaft 9, and a movable pin 16 is slidably connected in the movable pin slot 15. One end of the movable pin 16 is connected to the bottom surface of the movable pin slot 15 by a movable pin spring 43. A movable pin slot 17 matching the other end of the movable pin 16 is provided on the inner side wall of the transmission sleeve 14. A pulley 18 is also provided on the transmission sleeve 14, and the pulley 18 is sleeved on the outer side of the transmission sleeve 14 and rotatably connected thereto. A friction layer 19 is provided on the contact surface between the transmission sleeve 14 and the pulley 18. A baffle spring 20 is provided in the baffle slot 7, and one end of the baffle spring 20 is connected to the slot wall of the baffle slot 7, and the other end of the baffle spring 20 is connected to the plate wall of the air inlet baffle 42.

[0026] like Figure 3 and Figure 4 As shown, a protective mesh cover 21 is provided at the air inlet 4 , and the protective mesh cover 21 is fixed on the outer surface of the welding machine housing 1 .

[0027] A power connector 22 is fixed on the outer surface of the welding machine housing 1, and the power connector 22 is electrically connected to the power supply unit 2. A cover plate movable cavity 23 is provided inside the power connector 22. A conductive column through hole 24 is provided on the side wall of one side of the cover plate movable cavity 23, and a conductive column slot 25 is provided on the side wall of the other side of the cover plate movable cavity 23. The conductive column through hole 24 and the conductive column slot 25 are arranged opposite to each other. A torsion spring seat 26 is also fixed on the side wall of one side of the cover plate movable cavity 23. The torsion spring seat 26 is placed on the side of the conductive column through hole 24. A through hole cover plate 27 matching the conductive column through hole 24 is installed on the torsion spring seat 26, and the through hole cover plate 27 and the torsion spring seat 26 are rotatably connected.

[0028] like Figure 1 , Figure 6 and Figure 7As shown, it also includes a handle portion 28, on which an electrode connector 29 is arranged, and on which a connector slot 30 matching the power connector 22 is arranged, and a connector stopper 31 is fixed on the inner wall of the connector slot 30, and an axial slide groove 32 matching the connector stopper 31 is arranged on the outer wall of the power connector 22, and the connector stopper 31 and the axial slide groove 32 are slidably connected, and one end of the axial slide groove 32 is located on the end surface of the power connector 22, and a horizontal slide groove 33 matching the connector stopper 31 is arranged on the groove wall at the other end of the axial slide groove 32, and the connector stopper 31 and the horizontal slide groove 33 are slidably connected A limit block slot 34 matching the connector limit block 31 is provided on the slot wall of the horizontal slide slot 33, and the limit block slot 34 is placed on one side of the end face close to the power connector 22. The connector limit block 31 and the limit block slot 34 are engaged with each other, and a compression spring 35 is fixed on the bottom surface of the connector slot 30. A conductive column 36 matching the conductive column through hole 24 and the conductive column slot 25 is fixed on the bottom surface of the connector slot 30, and a conductive contact 1 37 is provided on the conductive column 36. A conductive contact 2 38 matching the conductive contact 1 37 is provided on the side wall of the conductive column slot 25, and the conductive contact 2 38 is electrically connected to the power supply unit 2.

[0029] like Figure 5 , Figure 6 and Figure 7 As shown, a cover plate limiting groove 39 matching the through hole cover plate 27 is provided on the side wall of the conductive column 36 , and when the connector limiting block 31 is inserted into the limiting block slot 34 , the through hole cover plate 27 is also pressed against the cover plate limiting groove 39 .

[0030] A handle 40 is fixed on the top of the welding machine housing 1 , and a universal movable wheel 41 is installed on the bottom of the welding machine housing 1 .

[0031] Protection principle of internal parts of welding machine housing 1: When the welding machine is in a shutdown state, the air inlet baffle 42 blocks the air inlet 4, and the air outlet baffle 6 blocks the air outlet 5, which can prevent dust, moisture or mosquitoes on the construction site from entering the welding machine housing 1 through the air inlet 4 or the air outlet 5 and affecting the service life of the internal parts.

[0032] When the welding machine is working, the cooling fan 3 blows air to the power supply unit 2 for heat dissipation. During the rotation of the cooling fan 3, the fan shaft 9 will be driven to rotate. At this time, the movable pin 16 in the movable pin slot 15 will automatically extend out of the movable pin slot 15 under the centrifugal effect and be inserted into the movable pin slot 17, so that the transmission sleeve 14 rotates synchronously with the fan shaft 9. Since a friction layer 19 is provided between the pulley 18 and the transmission sleeve 14, the pulley 18 will also rotate with the transmission sleeve 14 under the action of static friction, thereby driving the transmission belt 11 to move. Since the air inlet baffle 42 is fixed on the transmission belt 11, the air inlet baffle 42 will move with the transmission belt 11, thereby automatically moving away from the air inlet 4 (during the movement of the air inlet baffle 42, the baffle spring 20 is gradually compressed. When the baffle spring 20 is pressed against the air inlet baffle When the elastic force of the plate 42 and the static friction between the pulley 18 and the transmission sleeve 14 are balanced, the static friction between the pulley 18 and the transmission sleeve 14 will turn into dynamic friction, and the dynamic friction between the pulley 18 and the transmission sleeve 14 will maintain the stability of the air inlet baffle 42 to prevent the air inlet baffle 42 from moving back, thereby ensuring that the air inlet 4 can always be in an open state). At the same time, under the transmission action of the transmission shaft 10, the transmission belt 2 13 will also start to move synchronously. Since the air outlet baffle 6 is fixed on the transmission belt 2 13, the air outlet baffle 6 will move with the transmission belt 2 13, thereby automatically moving away from the air outlet 5. At this time, the external wind will be sucked in from the air inlet 4 under the negative pressure of the cooling fan 3, and blown toward the power supply unit 2, taking away the working heat of the power supply unit 2 and discharging it through the air outlet 5, thereby achieving heat dissipation and cooling of the power supply unit 2.

[0033] When the cooling fan 3 stops, the fan shaft 9 stops rotating. At this time, the movable pin 16 will automatically withdraw from the movable pin slot 17 under the reset action of the movable pin spring 43, so that the connection between the fan shaft 9 and the transmission sleeve 14 is disconnected. At this time, the air inlet baffle 42 will automatically move back and block the air inlet 4 again under the push of the reset elastic force of the baffle spring 20, and the return of the air inlet baffle 42 will also drive the transmission belt 1 11 and the transmission belt 2 13 to automatically reset, so that the air outlet baffle 6 will also automatically move back and block the air outlet 5 again.

[0034] Protection principle of power connector 22: When the welding machine is in a stopped state, the through-hole cover plate 27 in the cover plate movable cavity 23 will be automatically pressed against the conductive column through-hole 24 under the elastic force of the torsion spring seat 26 to prevent dust, moisture or mosquitoes on the construction site from entering the power connector 22 through the conductive column through-hole 24 and affecting the working life of the conductive connector.

[0035] The handle 28 is provided with a working electrode, and the handle 28 is electrically connected to the power supply unit 2 inside the welding machine housing 1 through the plug-in cooperation of the electrode connector 29 and the power connector 22, so as to supply power to the working electrode thereon. When plugging, align the connector stopper 31 on the inner wall of the connector slot 30 with the axial slot 32 on the outer wall of the power connector 22, and then insert the power connector 22 into the connector slot 30 on the electrode connector 29, at which time the conductive column 36 on the bottom surface of the connector slot 30 will also pass through the conductive column through hole 24 and enter the interior of the power connector 22 (the through hole cover plate 27 at the conductive column through hole 24 will be automatically pushed open by the conductive column 36). When the power connector 22 is inserted to the bottom of the connector slot 30, the conductive column 36 is just inserted to the bottom of the conductive column slot 25 (at this time, the compression spring 35 is compressed by the conductive column 36), and the connector limit block 31 in the axial slide groove 32 also just moves to the position of the horizontal slide groove 33. Then, the electrode connector 29 is rotated, the connector limit block 31 is transferred into the horizontal slide groove and the connector limit block 31 is moved to the position of the limit block slot 34. Finally, the user releases the electrode connector 29. At this time, the connector limit block 31 will automatically snap into the limit block slot 34 under the elastic force of the compression spring 35 (at the same time as the connector limit block 31 is snapped into the limit block slot 34, the through-hole cover plate 27 is also pressed against the cover plate limit slot 39), thereby completing the plug-in fixation of the electrode connector 29 and the power connector 22. After the electrode connector 29 and the power connector 22 are connected, the current of the power supply unit 2 is transmitted to the working electrode on the handle portion 28 through the conductive contact 2 38 , the conductive contact 1 37 and the conductive column 36 in sequence.

Claims

1. A welding device for a turbine seat ring and a volute, characterized in that it comprises: Welding machine housing (1); A power supply unit (2) is fixed inside the welding machine housing (1); A cooling fan (3) is fixed inside the welding machine housing (1) and is located above the power supply unit (2); An air inlet (4) is arranged on the top surface of the welding machine housing (1) and is located above the cooling fan (3); An air outlet (5) is arranged on the bottom surface of the welding machine housing (1) and is located below the power supply unit (2); An air inlet baffle (42) is arranged on the inner top surface of the welding machine housing (1) and matches the air inlet (4), and the air inlet baffle (42) and the welding machine housing (1) are movably connected; An air outlet baffle (6) is arranged on the inner lower surface of the welding machine housing (1) and matches the air outlet (5), and the air outlet baffle (6) and the welding machine housing (1) are movably connected; A baffle driving structure is arranged inside the welding machine housing (1) and is connected to the air inlet baffle (42) and the air outlet baffle (6); the baffle driving structure is connected to the cooling fan (3).

2. A welding device for a turbine seat ring and a volute according to claim 1, characterized in that: A baffle slide groove 1 (7) is provided on the inner top surface of the welding machine housing (1), the air inlet baffle (42) is mounted on the baffle slide groove 1 (7) and is slidably connected thereto, the air inlet (4) is located on the bottom surface of the baffle slide groove 1 (7), a baffle slide groove 2 (8) is provided on the inner bottom surface of the welding machine housing (1), the air outlet baffle (6) is mounted on the baffle slide groove 2 (8) and is slidably connected thereto, and the air outlet (5) is located on the bottom surface of the baffle slide groove 2 (8).

3. A welding device for a turbine seat ring and a volute according to claim 2, characterized in that: A unit frame is fixed on the inner bottom surface of the welding machine housing (1), the power unit (2) is fixed on the unit frame, a fan frame is fixed on the inner wall of the welding machine housing (1), the heat dissipation fan (3) is installed on the fan frame, a fan shaft (9) is arranged on the heat dissipation fan (3), a motor is also fixed on the inner wall of the welding machine housing (1), a motor shaft is arranged on the motor, and the motor shaft and the fan shaft (9) are connected by a gear train.

4. A welding device for a turbine seat ring and a volute according to claim 3, characterized in that: The baffle driving structure comprises a transmission shaft (10) installed inside the welding machine housing (1), the transmission shaft (10) and the welding machine housing (1) are rotatably connected, the transmission shaft (10) and the fan shaft (9) are connected via a transmission belt 1 (11), the air inlet baffle (42) is fixed on the transmission belt 1 (11), a driven shaft (12) is installed on the inner bottom surface of the welding machine housing (1), the driven shaft (12) is placed on the side of the unit frame, the driven shaft (12) and the welding machine housing (1) are rotatably connected, the driven shaft (12) and the transmission shaft (10) are connected via a transmission belt 2 (13), and the air outlet baffle (6) is fixed on the transmission belt 2 (13).

5. A welding device for a turbine seat ring and a volute according to claim 4, characterized in that: A transmission sleeve (14) is mounted on the fan shaft (9), and the transmission sleeve (14) is sleeved on the fan shaft (9) and is rotatably connected thereto. A movable pin slot (15) is provided on the side wall of the fan shaft (9), and a movable pin (16) is slidably connected in the movable pin slot (15). One end of the movable pin (16) is connected to the bottom surface of the movable pin slot (15) via a movable pin spring (43), and an movable spring (43) matching the other end of the movable pin (16) is provided on the inner side wall of the transmission sleeve (14). A movable pin slot (17), a pulley (18) is further provided on the transmission sleeve (14), the pulley (18) is sleeved on the outer side of the transmission sleeve (14) and is rotatably connected thereto, a friction layer (19) is provided on the contact surface between the transmission sleeve (14) and the pulley (18), a baffle spring (20) is provided in the baffle slide groove (7), one end of the baffle spring (20) is connected to the groove wall of the baffle slide groove (7), and the other end of the baffle spring (20) is connected to the plate wall of the air inlet baffle (42).

6. A welding device for a turbine seat ring and a volute according to any one of claims 1 to 5, characterized in that: A protective mesh cover (21) is provided at the air inlet (4), and the protective mesh cover (21) is fixed on the outer surface of the welding machine housing (1).

7. A welding device for a turbine seat ring and a volute according to any one of claims 1 to 5, characterized in that: A power connector (22) is fixed on the outer surface of the welding machine housing (1), and the power connector (22) is electrically connected to the power supply unit (2). A cover plate movable cavity (23) is provided inside the power connector (22), and a conductive column through hole (24) is provided on the side wall of one side of the cover plate movable cavity (23), and a conductive column slot (25) is provided on the side wall of the other side of the cover plate movable cavity (23). The conductive column through hole (24) and the conductive column slot (25) are arranged opposite to each other. A torsion spring seat (26) is also fixed on the side wall of one side of the cover plate movable cavity (23), and the torsion spring seat (26) is placed on the side of the conductive column through hole (24). A through hole cover plate (27) matching the conductive column through hole (24) is installed on the torsion spring seat (26), and the through hole cover plate (27) and the torsion spring seat (26) are rotatably connected.

8. A welding device for a turbine seat ring and a volute according to claim 7, characterized in that: The device further comprises a handle portion (28), wherein the handle portion (28) is provided with an electrode connector (29), wherein the electrode connector (29) is provided with a connector slot (30) matching the power connector (22), wherein a connector stop block (31) is fixed on the inner wall of the connector slot (30), wherein an axial slide groove (32) matching the connector stop block (31) is provided on the outer wall of the power connector (22), wherein the connector stop block (31) and the axial slide groove (32) are slidably connected, wherein one end of the axial slide groove (32) is located on the end surface of the power connector (22), wherein a horizontal slide groove (33) matching the connector stop block (31) is provided on the groove wall at the other end of the axial slide groove (32), wherein the connector stop block (31) and the horizontal slide groove (33) are slidably connected, A limit block slot (34) matching the connector limit block (31) is provided on the slot wall of the horizontal slide slot (33); the limit block slot (34) is disposed on one side of the end surface close to the power connector (22); the connector limit block (31) and the limit block slot (34) are engaged with each other; a compression spring (35) is fixed on the bottom surface of the connector slot (30); a conductive column (36) matching the conductive column through hole (24) and the conductive column slot (25) is fixed on the bottom surface of the connector slot (30); a conductive contact 1 (37) is provided on the conductive column (36); a conductive contact 2 (38) matching the conductive contact 1 (37) is provided on the side wall of the conductive column slot (25); the conductive contact 2 (38) is electrically connected to the power supply unit (2).

9. A welding device for a turbine seat ring and a volute according to claim 8, characterized in that: A cover plate limiting groove (39) matching the through-hole cover plate (27) is provided on the side wall of the conductive column (36); when the connector limiting block (31) is inserted into the limiting block slot (34), the through-hole cover plate (27) is also pressed against the cover plate limiting groove (39).

10. A welding device for a turbine seat ring and a volute according to claim 9, characterized in that: A handle (40) is fixed to the top of the welding machine housing (1), and a universal movable wheel (41) is installed at the bottom of the welding machine housing (1).

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