Water pump and water-cooling welding machine

Abstract

The water pump comprises a shell assembly, a rotor assembly and a stator assembly, the shell assembly comprises a machine shell, a pump cover and a volute, the pump cover is connected with the front end of the machine shell in a sealed mode, the pump cover is provided with a water pumping cavity, a water inlet pipeline and a water outlet pipeline, the water inlet pipeline and the water outlet pipeline are communicated with the water pumping cavity, and the volute is arranged in the machine shell; the front end of the volute extends to the front end of the machine shell and is connected with the machine shell in a sealed mode, the volute is provided with a rotor cavity communicated with the water pumping cavity, the rear end of the volute is provided with a drainage pipeline extending out of the machine shell, and an annular stator cavity is formed between the machine shell and the volute. The rotor assembly comprises a rotor and an impeller, the rotor is rotatably installed in the rotor cavity, the impeller is fixedly connected to the end of the rotor and located in the water pumping cavity, a cooling channel is formed between the rotor and the volute, and the two ends of the cooling channel communicate with the water pumping cavity and the drainage pipeline correspondingly; the stator assembly is arranged in the stator cavity. According to the embodiment of the invention, the rotor is water-cooled by introducing liquid, and the pressure in the water pump can be balanced.

Description

Technical Field

[0001] The present invention relates to the technical field of water cooling equipment, and in particular to a water pump and a water cooling welding machine. Background Art

[0002] At present, welding guns need to be cooled during use. In the prior art, water cooling is one of the cooling methods, that is, the water in the water tank is output through a water pump to cool the welding gun. The water pump includes a turbine and a motor. The turbine is driven to rotate under the action of the motor so as to form a negative pressure in the water pump to achieve the function of transmitting water to the external source. However, under the continuous operation of the water pump, the temperature of the rotor located in the center of the motor continues to increase, causing the motor to have a high temperature due to poor heat dissipation performance, affecting the efficiency of the motor, and further affecting the working efficiency of the water pump. On the other hand, due to the high internal pressure of the water pump during use, the motor is unstable due to the heavy load, especially when the water outlet of the water pump is blocked and the motor is blocked, it is easy to burn the motor due to excessive pressure. Therefore, it is necessary to propose a water pump that can solve the above technical problems. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a water pump that can cool a rotor by introducing liquid and balance the pressure inside the water pump.

[0004] The present invention also proposes a water-cooled welding machine using the water pump.

[0005] A water pump proposed in accordance with an embodiment of the first aspect of the present invention comprises a casing assembly, a rotor assembly and a stator assembly, wherein the casing assembly comprises a casing, a pump cover and a volute, the pump cover is sealedly connected to the front end of the casing, the pump cover is provided with a pump water chamber and a water inlet pipe and a water outlet pipe connected to the pump water chamber, the volute is arranged in the casing, the front end of the volute extends to the front end of the casing and is sealedly connected to the casing, the volute is provided with a rotor chamber connected to the pump water chamber, the rear end of the volute is provided with a drainage pipe extending to the outside of the casing, and an annular stator chamber is formed between the casing and the volute; the rotor assembly comprises a rotor and an impeller, the rotor is rotatably mounted in the rotor chamber, the impeller is fixedly connected to the end of the rotor and is located in the pump water chamber, a cooling channel is formed between the rotor and the volute, and the two ends of the cooling channel are respectively connected to the pump water chamber and the drainage pipe; the stator assembly is mounted in the stator chamber.

[0006] The water pump according to the above embodiment of the present invention has at least the following beneficial effects: The water pump provided by the embodiment of the present invention sets a cooling channel between the rotor and the volute, so that the liquid entering the pump water chamber through the water inlet pipe enters the water outlet pipe under the drive of the impeller, and part of the liquid can flow through the cooling channel and be discharged through the drainage pipe under the action of the water flow, so that the heat generated during the operation of the rotor can be taken away by the direct contact between the liquid and the rotor to cool the rotor, thereby improving the cooling efficiency, reducing the heat accumulation of the motor, and effectively improving the working efficiency and service life of the motor. In addition, through the optimized design of the flow channel, the water flow can take away impurities and pollutants in the water pump and be discharged through the drainage pipe, thereby preventing the accumulation of impurities and pollutants to form scale, thereby maintaining the efficient operation of the water pump.

[0007] The water pump provided by the embodiment of the present invention can not only play a cooling role through the optimized design of the flow channel, but also play a pressure relief role. The water flows into the cooling channel under high pressure and is discharged through the drainage pipe, so as to balance the internal pressure of the rotor cavity, making the water pump run more smoothly, and can discharge the water flow in time to relieve pressure when the motor is blocked due to blockage in the outlet pipe, thereby preventing the motor from burning, and effectively improving the working efficiency and service life of the motor. On the other hand, when the water pump starts to run, there is often a problem of trapped air due to residual gas in the pump water chamber, which affects the working efficiency. By providing a drainage pipe at the rear end of the volute, the residual gas in the pump water chamber can be discharged through the drainage pipe, so that the water pump can enter the full load state faster and improve the working efficiency.

[0008] According to some embodiments of the present invention, the water inlet pipe is arranged on the axial end surface of the pump cover away from the volute, the water outlet pipe is arranged on the circumferential surface of the pump cover, and the drainage pipe is arranged near the bottom of the volute.

[0009] According to some embodiments of the present invention, the water inlet pipe is located on the axis of the casing and is arranged coaxially with the volute, and the axis of the water outlet pipe is perpendicular to the axis of the water inlet pipe.

[0010] According to some embodiments of the present invention, the axis of the drainage pipe is parallel to the axis of the water inlet pipe and is located directly below the axis of the water inlet pipe.

[0011] According to some embodiments of the present invention, the rotor assembly further includes a central shaft, the central shaft is rotatably disposed on the axis of the volute, and the rotor is rotatably sleeved on the central shaft.

[0012] According to some embodiments of the present invention, a first rotating seat is provided on the inner wall of the volute away from the pump cover, and the pump cover is provided with a second rotating seat opposite to the first rotating seat. Both ends of the central axis can be rotatably inserted in the first rotating seat and the second rotating seat respectively, and gaskets are provided between the rotor and the first rotating seat and the second rotating seat, and the gaskets are sleeved on the central axis.

[0013] According to some embodiments of the present invention, the stator assembly includes a stator winding and a PCB board, the stator winding is sleeved on the volute, the PCB board is used to connect to an external power supply, the PCB board is installed on a side of the stator winding away from the pump cover, the stator winding has a phase line terminal, and the PCB board is provided with a phase line pin electrically contacting the phase line terminal.

[0014] According to some embodiments of the present invention, the water pump further comprises an electric control box, the electric control box is disposed outside the casing and is separately arranged from the casing, and the PCB board is electrically connected to the electric control box.

[0015] According to some embodiments of the present invention, a connecting seat is provided on the top outer wall of the casing, a slide groove is provided on the upper end surface of the connecting seat, an opening is provided at the head end of the slide groove, slots connected to the openings are provided on the inner walls on opposite sides of the slide groove, and the extension direction of the slots is the same as the extension direction of the slide groove, a plug-in seat is provided in the middle of the bottom surface of the electric control box, the plug-in seat can be slidably arranged in the slide groove, plug-in plates extending outward are provided on opposite sides of the plug-in seat, the plug-in plates can be inserted in the slots, and a buckle is provided at the bottom of the front end of the electric control box, and the buckle can be buckled to the front end of the connecting seat.

[0016] A water-cooled welding machine according to an embodiment of the second aspect of the present invention comprises a water pump as described in any one of the embodiments of the first aspect of the present invention.

[0017] The water-cooled welding machine according to the above embodiment of the present invention has at least the following beneficial effects: The water pump of the water-cooled welding machine provided by the embodiment of the present invention sets a cooling channel between the rotor and the volute, so that the liquid entering the pump water chamber through the water inlet pipe enters the water outlet pipe under the drive of the impeller, and part of the liquid can flow through the cooling channel and be discharged through the drainage pipe under the action of the water flow, so that the heat generated during the operation of the rotor can be taken away by the direct contact between the liquid and the rotor to cool the rotor, thereby improving the cooling efficiency, reducing the heat accumulation of the motor, and effectively improving the working efficiency and service life of the motor. In addition, through the optimized design of the flow channel, the water flow can take away impurities and pollutants in the water pump and discharge them through the drainage pipe, thereby preventing the accumulation of impurities and pollutants to form scale, thereby maintaining the efficient operation of the water pump.

[0018] The water pump of the water-cooled welding machine provided by the embodiment of the present invention plays a cooling role through the optimized design of the flow channel, and can also play a pressure relief role. The water flows into the cooling channel under high pressure and is discharged through the drainage pipe, so that the internal pressure of the rotor cavity can be balanced, so that the water pump runs more smoothly, and when the motor is blocked due to blockage in the water outlet pipe, the water flow can be discharged in time to play a pressure relief role, thereby preventing the motor from burning, and effectively improving the working efficiency and service life of the motor. On the other hand, when the water pump starts to run, there is often a problem of trapped air due to residual gas in the pump water chamber, which affects the working efficiency. By providing a drainage pipe at the rear end of the volute, the residual gas in the pump water chamber can be discharged through the drainage pipe, so that the water pump can enter the full load state faster and improve the working efficiency.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 It is a schematic diagram of the structure of a water pump according to some embodiments of the present invention; Figure 2 An exploded view of a water pump according to some embodiments of the present invention; Figure 3 sectional views of water pumps according to some embodiments of the present invention; Figure 4 A schematic diagram of a water pump in some embodiments of the present invention configured with an electric control box; Figure 5 Another schematic diagram of a water pump according to some embodiments of the present invention configured with an electric control box.

[0021] Wherein, the reference numerals are: Casing 110; stator cavity 111; bottom bracket 112; pump cover 120; pump water cavity 121; water inlet pipe 122; annular groove 1221; fixed groove 1222; water outlet pipe 123; second rotating seat 124; volute 130; rotor cavity 131; drainage pipe 132; cooling channel 133; first rotating seat 134; end cover 140; gasket 150; connecting seat 160; slide groove 161; slot 162; adapter 170; fixing hole 171; first sealing ring 180; second sealing ring 190; Rotor assembly 200; rotor 210; impeller 220; central shaft 230; Stator assembly 300; stator winding 310; PCB board 320; phase line pin 330; Electric control box 400; socket 410; plug board 420; buckle 430; handle 440. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, the words such as setting, installing, connecting, etc. should be understood in a broad sense, and the technical personnel in the relevant technical field can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution. In the description of the present invention, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the description of the present specification, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0026] Reference Figures 1 to 5 A water pump according to an embodiment of the present invention includes a housing assembly, a rotor assembly 200 and a stator assembly 300. The housing assembly includes a casing 110, a pump cover 120 and a volute 130. The pump cover 120 is sealed and connected to the front end of the casing 110. The pump cover 120 is provided with a pump water cavity 121 and an inlet pipe 122 and an outlet pipe 123 connected to the pump water cavity 121. The volute 130 is arranged in the casing 110. The front end of the volute 130 extends to the front end of the casing 110 and is sealed and connected to the casing 110. The volute 130 is provided with a rotor cavity 131 connected to the pump water cavity 121. A drainage pipe 132 extending to the outside of the casing 110 is provided at the rear end of the volute 130, and an annular stator cavity 111 is formed between the casing 110 and the volute 130; the rotor assembly 200 includes a rotor 210 and an impeller 220, the rotor 210 is rotatably mounted in the rotor cavity 131, the impeller 220 is fixedly connected to the end of the rotor 210 and is located in the pump water cavity 121, a cooling channel 133 is formed between the rotor 210 and the volute 130, and the two ends of the cooling channel 133 are respectively connected to the pump water cavity 121 and the drainage pipe 132; the stator assembly 300 is mounted in the stator cavity 111.

[0027] It can be understood that the water pump provided by the embodiment of the present invention sets a cooling channel 133 between the rotor 210 and the volute 130, so that the liquid entering the pump water chamber 121 through the water inlet pipe 122 enters the water outlet pipe 123 under the drive of the impeller 220, and part of the liquid can flow through the cooling channel 133 and be discharged through the drainage pipe 132 under the action of the water flow, so that the heat generated during the operation of the rotor 210 can be taken away through the direct contact between the liquid and the rotor 210 to cool the rotor 210, thereby improving the cooling efficiency, reducing the heat accumulation of the motor, and effectively improving the working efficiency and service life of the motor. In addition, through the optimized design of the flow channel, the water flow can take away impurities and pollutants in the water pump and discharge them through the drainage pipe 132, preventing the accumulation of impurities and pollutants to form scale, thereby maintaining the efficient operation of the water pump.

[0028] It is further explained that the water pump provided by the embodiment of the present invention can not only play a cooling role through the optimized design of the flow channel, but also play a pressure relief role. The water flows into the cooling channel 133 under high pressure and is discharged through the drainage pipe 132, so that the internal pressure of the rotor cavity 131 can be balanced, so that the water pump runs more smoothly, and the mechanical instability and jitter of the water pump can be reduced. When the motor is blocked due to blockage in the outlet pipe 123, the water flow can be discharged in time to play a pressure relief role, thereby preventing the motor from burning, and effectively improving the working efficiency and service life of the motor. On the other hand, when the water pump starts to run, there is often a problem of trapped air due to the residual gas in the pump water chamber 121, which affects the working efficiency. By providing a drainage pipe 132 at the rear end of the volute 130, the residual gas in the pump water chamber 121 can be discharged through the drainage pipe 132, so that the water pump can enter the full load state faster and improve the working efficiency.

[0029] Further, see Figures 1 to 5 According to some embodiments of the present invention, a water inlet pipe 122 is provided on the axial end face of the pump cover 120 away from the volute 130, and a water outlet pipe 123 is provided on the peripheral surface of the pump cover 120. Preferably, the inlet of the cooling channel 133 is connected to the radial outer side of the pump water cavity 121, and the drainage pipe 132 is provided on the radial outer side of the rear end of the volute 130.

[0030] It can be understood that when the impeller 220 rotates, the liquid outside the water pump can be sucked into the pump water chamber 121 through the water inlet pipe 122, and then discharged through the water outlet pipe 123. The liquid transported by the pump body is not limited to water, but can also be other liquids. In this process, the rotation of the impeller 220 generates water flow, so that the water pressure of the part close to the center line of the impeller 220 in the radial direction is relatively small, and the area close to the outer diameter of the impeller 220 is affected by the water pressure of the high-pressure turbulent area, that is, the area outside the pump water chamber 121 in the radial direction, and a pressure difference of high outside and low inside is generated in the radial direction. Accordingly, the pressure of the part of the rotor cavity 131 that docks with the radial outside of the pump water chamber 121, that is, the cooling channel 133, is greater than the part docking with the radial inside of the pump water chamber 121. The existence of the pressure difference forces the rotor cavity 131 to generate water flow, so as to cool the rotor 210 with the help of the water flow. By directly using the available pressure drop caused by the vortex motion of the impeller 220, the liquid flow in the cooling channel 133 is directly driven, and no external power source is required to drive the water flow for cooling, which can effectively reduce the cost. At the same time, through the optimized design of the flow channel, the inlet of the cooling channel 133 is connected to the radially outer side of the pump water chamber 121, and the outlet of the cooling channel 133, namely the drainage pipe 132, is correspondingly arranged on the radially outer side of the rear end of the volute 130, so as to utilize high-pressure turbulence to increase the speed of the cooling water flow entering and discharging the cooling channel 133, thereby taking away the heat of the rotor 210 more quickly and improving the heat dissipation efficiency.

[0031] Preferably, in an embodiment of the present invention, the drainage pipe 132 is arranged near the bottom of the volute 130, so that while utilizing the high-pressure turbulence on the radially outer side of the pump water chamber 121, the high and low water potentials can be utilized to increase the speed at which the coolant is discharged through the drainage pipe 132, thereby reducing hydraulic losses, thereby taking away the heat of the rotor 210 more quickly, improving the heat dissipation efficiency, and being able to ensure the effective discharge of the coolant to prevent water accumulation.

[0032] Further, see Figure 3 According to some embodiments of the present invention, the water inlet pipe 122 is located on the axis of the casing 110 and is coaxially arranged with the volute 130, the axis of the water outlet pipe 123 is perpendicular to the axis of the water inlet pipe 122, and the axis of the drain pipe 132 is parallel to the axis of the water inlet pipe 122 and is located directly below the axis of the water inlet pipe 122.

[0033] It can be understood that this design is conducive to simplifying pipeline connections and reducing installation complexity, while also helping to optimize the flow path, thereby improving the efficiency of fluid transmission.

[0034] Further, see Figure 3According to some embodiments of the present invention, the housing assembly further includes an end cover 140, which is used to open or close the rear end of the casing 110, thereby facilitating the disassembly and assembly of the water pump, and facilitating repair and maintenance. The drainage pipe 132 extends backward to the end cover 140 and extends out of the end cover 140, and the drainage pipe 132 is sealedly connected to the end cover 140, so that a closed stator cavity 111 is formed between the casing 110, the volute 130 and the end cover 140, thereby preventing external liquid from entering the stator cavity 111 and causing a short circuit.

[0035] Further, see Figure 3 According to some embodiments of the present invention, the pump cover 120 is sealed to the front end of the housing 110 through the first sealing ring 180, thereby preventing liquid leakage from the pump water chamber 121. The volute 130 and the housing 110 are integrated, thereby simplifying the manufacturing process and assembly process, reducing production and processing costs, and improving work efficiency.

[0036] Further, see Figure 3 According to some embodiments of the present invention, the rotor assembly 200 further includes a central shaft 230, which is rotatably disposed on the axis of the volute 130, and the rotor 210 is rotatably sleeved on the central shaft 230, thereby improving the stability of the rotor 210 during rotation and reducing vibration and noise caused by imbalance.

[0037] Further, see Figure 3 According to some embodiments of the present invention, a first rotating seat 134 is provided on the inner wall of the volute 130 away from the pump cover 120, and the pump cover 120 is provided with a second rotating seat 124 opposite to the first rotating seat 134. Both ends of the central shaft 230 can be rotatably inserted into the first rotating seat 134 and the second rotating seat 124 respectively. Gaskets 150 are provided between the rotor 210 and the first rotating seat 134 and the second rotating seat 124. The gasket 150 is sleeved on the central shaft 230, which further reduces the vibration of the rotor 210 during operation and improves the stability of the system.

[0038] Further, see Figure 2 and Figure 3 According to some embodiments of the present invention, the stator assembly 300 includes a stator winding 310 and a PCB board 320. The stator winding 310 is mounted on the volute 130. The PCB board 320 is used to connect to an external power supply. The PCB board 320 is installed on a side of the stator winding 310 away from the pump cover 120. The stator winding 310 has a phase terminal, and the PCB board 320 is provided with a phase pin 330 that is in electrical contact with the phase terminal.

[0039] It is understandable that the user can make electrical connection by opening the end cover 140, which simplifies the electrical connection process and facilitates the connection between the stator winding 310 and the external power supply.

[0040] Preferably, according to some embodiments of the present invention, the stator winding 310 is arranged close to the volute 130, and the material preferably used for the volute 130 has the characteristics of high thermal conductivity, corrosion resistance, and rust resistance, such as aluminum alloy and other materials, which can not only improve the heat dissipation efficiency, but also help to reduce weight and control costs.

[0041] It can be understood that by keeping the stator winding 310 close to the volute 130 with high thermal conductivity, the heat generated by the stator winding 310 during operation can be transferred to the volute 130, so that the heat can be taken away by the coolant in the cooling channel 133, so that the stator winding 310 can be cooled while cooling the rotor 210, thereby improving the heat dissipation efficiency and ensuring the stability of the system.

[0042] Further, see Figure 4 and Figure 5 According to some embodiments of the present invention, the water pump further includes an electric control box 400, which is externally disposed on the housing 110 and is separated from the housing 110. The PCB board 320 is electrically connected to the electric control box 400, which is convenient for later disassembly, assembly and maintenance, and also facilitates the management of electrical connections.

[0043] It is further explained that according to some embodiments of the present invention, a cable connector is provided on the housing 110 or the end cover 140, specifically a sealed waterproof and dustproof connector, the cable connector can be locked by screws, the PCB board 320 can lead out a wire to seal the cable connector, and after the cable connector extends out of the housing 110 or the end cover 140, it is electrically connected to the electric control box 400.

[0044] Further, see Figure 1 , Figure 4 and Figure 5 According to some embodiments of the present invention, a connecting seat 160 is provided on the top outer wall of the casing 110, and a slide groove 161 is provided on the upper end surface of the connecting seat 160, and an opening is provided at the head end of the slide groove 161, and slots 162 connected to the openings are provided on the inner walls on the opposite sides of the slide groove 161, and the extension direction of the slot 162 is the same as the extension direction of the slide groove 161. A plug-in seat 410 is provided in the middle of the bottom surface of the electric control box 400, and the plug-in seat 410 can be slidably arranged in the slide groove 161, and plug-in plates 420 extending outward are provided on the opposite sides of the plug-in seat 410, and the plug-in plates 420 can be inserted in the slots 162, and a buckle 430 is provided at the bottom of the front end of the electric control box 400, and the buckle 430 can be buckled to the front end of the connecting seat 160.

[0045] It can be understood that when installing the electric control box 400, the user aligns the two plug plates 420 with the two slots 162 and inserts them. The plug plates 420 play a role of limiting and guiding, so that the connector 410 moves along the slide groove 161 until the front end of the electric control box 400 reaches the innermost part of the slide groove 161, so that the buckle 430 at the bottom of the front end of the electric control box 400 can buckle with the front end of the connecting seat 160. To disassemble the electric control box 400, you only need to release the buckle 430 and pull out the electric control box 400. The structure is simple and the operation is convenient. It is not only convenient for quick installation, but also can ensure the stability of the installation of the electric control box 400, reducing the failure rate caused by looseness.

[0046] Further, see Figure 1 According to some embodiments of the present invention, along the extension direction of the chute 161, the width of the slot 162, i.e., the distance between the inner walls on both sides, gradually decreases, and the minimum width of the slot 162 is not less than the width of the plugboard 420. Preferably, the minimum width of the slot 162 is equal to the width of the plugboard 420, so that the electric control box 400 can be installed firmly. It can be understood that by designing the width of the slot 162 at the opening of the chute 161 to be greater than the width of the plugboard 420, it is convenient for users to insert the plugboard 420 into the slot 162 without frequent positioning, thereby improving work efficiency.

[0047] Furthermore, according to some embodiments of the present invention, the slot 162 may be provided with a variable section with a gradually decreasing width in the front portion, and a straight section with a constant width and equal to the width of the plug-in board 420 in the rear portion, so that after the plug-in board 420 is inserted into the straight section, the electrical control box 400 can be installed firmly. The specific extension lengths of the variable section and the straight section can be determined based on actual conditions and are not specifically limited here.

[0048] Further, see Figure 4 and Figure 5 According to some embodiments of the present invention, handles 440 are provided on the outer walls of the electric control box 400 on both sides to facilitate user use.

[0049] Further, see Figure 1 According to some embodiments of the present invention, a connecting seat 160 is provided in the middle of the top outer wall of the housing 110, and a slide groove 161 extends along the axial direction of the housing 110, so as to facilitate user use by optimizing the structural layout.

[0050] Further, see Figure 1 According to some embodiments of the present invention, bottom brackets 112 are disposed on opposite sides of the bottom of the housing 110 to support the water pump.

[0051] Further, see Figures 1 to 5According to some embodiments of the present invention, the water inlet pipe 122 is provided with an adapter 170, and the water inlet pipe 122 is provided with an annular groove 1221 and a fixing groove 1222 in sequence along the direction close to the pump cover 120, the annular groove 1221 is provided with a second sealing ring 190, the adapter 170 and the water inlet pipe 122 are sealed and connected through the second sealing ring 190, and the outer peripheral wall of the adapter 170 is provided with a fixing hole 171 at a position corresponding to the fixing groove 1222, and a bolt is provided in the fixing hole 171, and the fixing groove 1222 and the fixing hole 171 are fixedly connected by bolts.

[0052] It is understandable that, through the design of the adapter 170, the appropriate adapter 170 specifications can be selected according to different application scenarios, thereby enhancing the adaptability of the water pump in different environments. By providing an annular groove 1221 on the water inlet pipe 122 and inserting the second sealing ring 190 in the annular groove 1221, a good sealing connection can be formed between the adapter 170 and the water inlet pipe 122, effectively preventing liquid leakage and ensuring the normal operation of the system. The adapter 170 is fixedly connected to the water inlet pipe 122 by bolts in the fixing groove 1222 and the fixing hole 171, which improves the stability of the connection, facilitates disassembly and replacement, and reduces maintenance costs.

[0053] Further, see Figure 5 According to some embodiments of the present invention, the fixing groove 1222 is annular and is arranged coaxially with the annular groove 1221, and a plurality of fixing holes 171 are evenly arranged on the outer peripheral wall of the adapter 170 in the circumferential direction.

[0054] It is understandable that this design can make the stress generated by the multiple bolts when tightened be evenly distributed on the circumference of the water inlet pipe 122, avoiding material fatigue or deformation that may be caused by local stress concentration, thereby improving the strength and reliability of the connection part, and at the same time helping to keep the second sealing ring 190 in a relatively uniform pressure environment, helping to maintain the integrity and sealing performance of the sealing ring, and reducing the risk of coolant leakage. It is also convenient for users to tighten from multiple angles, simplifying the installation process, and convenient for users to rotate the adapter 170 to adjust the position. At the same time, when disassembly is required, the bolts can be easily unscrewed one by one, and it will not be difficult to disassemble due to excessive force on a single point.

[0055] Further, see Figure 5 According to some embodiments of the present invention, the water inlet pipe 122 is provided with a plurality of annular grooves 1221 along the axial direction. The specific number of the annular grooves 1221 may be 2, 3, 4 or other numbers, which may be determined according to actual conditions and is not specifically limited herein.

[0056] It is understandable that by setting multiple layers of second sealing rings 190 to form multiple sealing barriers, the reliability of the seal and the anti-leakage performance of the liquid are greatly improved. Even if a layer of the second sealing ring 190 fails, the other sealing layers can continue to play a role to ensure the normal operation of the system. The multiple annular grooves 1221 arranged along the axial direction can provide more fixing points, so that the connection between the adapter 170 and the water inlet pipe 122 is more stable, which can not only prevent loosening caused by vibration, but also resist the force applied from the outside to ensure the tightness of the connection. When the water inlet pipe 122 is subjected to high-pressure water flow, the multiple annular grooves 1221 can disperse the pressure and reduce the pressure load borne by a single second sealing ring 190, thereby reducing the risk of sealing failure caused by excessive pressure and enhancing the pressure resistance of the system. Users can choose to install the second sealing ring 190 in different annular grooves 1221 according to actual needs, or adjust the number and position of the second sealing ring 190 according to changes in working conditions, and flexibly adjust the sealing effect to adapt to different working conditions.

[0057] A water-cooled welding machine proposed according to the present invention includes the water pump of the above embodiment. Since the water-cooled welding machine adopts all the above technical solutions, it should have the same beneficial effects, which will not be described in detail here.

[0058] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A water pump, characterized in that: include: A housing assembly, comprising a casing, a pump cover and a volute, wherein the pump cover is sealed and connected to the front end of the casing, the pump cover is provided with a pump water cavity and a water inlet pipe and a water outlet pipe connected to the pump water cavity, the volute is arranged in the casing, the front end of the volute extends to the front end of the casing and is sealed and connected to the casing, the volute is provided with a rotor cavity connected to the pump water cavity, the rear end of the volute is provided with a drainage pipe extending to the outside of the casing, and an annular stator cavity is formed between the casing and the volute; A rotor assembly, comprising a rotor and an impeller, wherein the rotor is rotatably mounted in the rotor cavity, the impeller is fixedly connected to the end of the rotor and is located in the pump water cavity, a cooling channel is formed between the rotor and the volute, and both ends of the cooling channel are respectively connected to the pump water cavity and the drainage pipe; The stator assembly is installed in the stator cavity.

2. The water pump according to claim 1, characterized in that: The water inlet pipe is arranged on the axial end surface of the pump cover away from the volute, the water outlet pipe is arranged on the peripheral surface of the pump cover, and the drainage pipe is arranged near the bottom of the volute.

3. The water pump according to claim 2, characterized in that: The water inlet pipe is located on the axis of the casing and is coaxially arranged with the volute, and the axis of the water outlet pipe is perpendicular to the axis of the water inlet pipe.

4. The water pump according to claim 3, characterized in that: The axis of the drainage pipe is parallel to the axis of the water inlet pipe and is located directly below the axis of the water inlet pipe.

5. The water pump according to claim 1, characterized in that: The rotor assembly also includes a central shaft, which is rotatably disposed on the axis of the volute, and the rotor is rotatably sleeved on the central shaft.

6. The water pump according to claim 5, characterized in that: A first rotating seat is provided on the inner wall of the volute away from the pump cover, and the pump cover is provided with a second rotating seat opposite to the first rotating seat. Both ends of the central axis can be rotatably inserted in the first rotating seat and the second rotating seat respectively, and gaskets are provided between the rotor and the first rotating seat and the second rotating seat, and the gaskets are sleeved on the central axis.

7. The water pump according to claim 1, characterized in that: The stator assembly includes a stator winding and a PCB board, the stator winding is sleeved on the volute, the PCB board is used to connect to an external power supply, the PCB board is installed on a side of the stator winding away from the pump cover, the stator winding has a phase line terminal, and the PCB board is provided with a phase line pin electrically contacting the phase line terminal.

8. The water pump according to claim 7, characterized in that: The water pump further comprises an electric control box, which is disposed outside the casing and is separated from the casing, and the PCB board is electrically connected to the electric control box.

9. The water pump according to claim 8, characterized in that A connecting seat is provided on the top outer wall of the casing, a sliding groove is provided on the upper end surface of the connecting seat, an opening is provided at the head end of the sliding groove, slots connected to the openings are provided on the inner walls on opposite sides of the sliding groove, and the extension direction of the slots is the same as the extension direction of the sliding groove; a plug-in seat is provided on the middle part of the bottom surface of the electric control box, the plug-in seat can be slidably arranged in the sliding groove, plug-in plates extending outward are provided on opposite sides of the plug-in seat, the plug-in plates can be plugged into the slots, and a buckle is provided on the bottom front end of the electric control box, and the buckle can be buckled to the front end of the connecting seat.

10. A water-cooled welding machine, characterized in that: Comprising the water pump according to any one of claims 1 to 9.

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