Water pump and water-cooled welding machine

Abstract

The application discloses a water pump and a water-cooled welding machine, wherein the water pump comprises a shell assembly, a rotor assembly and a stator assembly; the shell assembly comprises a shell, a pump cover and a volute; the pump cover is in sealing connection with the front end of the shell; the pump cover is provided with a pump water cavity, a water inlet pipeline and a water outlet pipeline which are in communication with the pump water cavity; the volute is arranged in the shell; the front end of the volute extends to the front end of the shell and is in sealing connection with the shell; the volute is provided with a rotor cavity which is in communication with the pump water cavity; the rear end of the volute is provided with a water outlet pipeline which extends to the outside of the shell; an annular stator cavity is formed between the shell and the volute; the rotor assembly comprises a rotor and an impeller; the rotor is rotatably arranged in the rotor cavity; the impeller is fixedly connected to the end of the rotor and located in the pump water cavity; a cooling channel is formed between the rotor and the volute; the two ends of the cooling channel are in communication with the pump water cavity and the water outlet pipeline respectively; and the stator assembly is arranged in the stator cavity. The water-cooled rotor can balance the pressure in the water pump.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water cooling equipment, in particular to a water pump and a water-cooled welding machine. BACKGROUND

[0002] At present, the welding gun needs to be cooled during use. In the prior art, water cooling is one of the cooling methods, that is, water in the water tank is output by 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 negative pressure in the water pump and achieve the function of transferring water from the outside. However, under the continuous operation of the water pump, the temperature of the rotor located at the center of the motor continuously increases, so that the motor has a high temperature due to poor heat dissipation performance, which affects the efficiency of the motor and further affects 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 runs unstably due to heavy load. In particular, when the water outlet of the water pump is blocked, the motor is easily blocked and burned due to excessive pressure. Therefore, it is necessary to propose a water pump that can solve the above technical problems. SUMMARY

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

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

[0005] According to the water pump of the first aspect of the present application, the water pump comprises a shell assembly, a rotor assembly and a stator assembly. The shell assembly comprises a shell, a pump cover and a volute. The pump cover is sealingly connected to the front end of the shell. The pump cover is provided with a pump water cavity, and a water inlet pipeline and a water outlet pipeline which communicate with the pump water cavity. The volute is arranged in the shell. The front end of the volute extends to the front end of the shell and is sealingly connected to the shell. The volute is provided with a rotor cavity which communicates with the pump water cavity. The rear end of the volute is provided with a drain pipeline which extends to the outside of the shell. An annular stator cavity is formed between the shell and the volute. The rotor assembly comprises a rotor and an impeller. The rotor is rotatably arranged in the rotor cavity. The impeller is fixedly connected to the end of the rotor and located in the pump water cavity. A cooling channel is formed between the rotor and the volute. The two ends of the cooling channel respectively communicate with the pump water cavity and the drain pipeline. The stator assembly is arranged in the stator cavity.

[0006] According to the water pump of the above-mentioned embodiments of the present application, at least the following beneficial effects are achieved:

[0007] The water pump provided by the embodiment of the present application is cooled by setting a cooling channel between the rotor and the volute, so that part of the liquid entering the pump water cavity through the water inlet pipe can flow through the cooling channel and be discharged through the drain pipe under the action of the water flow while the liquid entering the pump water cavity through the water inlet pipe is driven by the impeller to enter the water outlet pipe, thereby the heat generated by the rotor during operation can be taken away by the direct contact between the liquid and the rotor to cool the rotor, improve the cooling efficiency, reduce the heat accumulation of the motor, effectively improve the working efficiency and service life of the motor, and through the optimized design of the flow channel, the water flow can take away the impurities and pollutants in the water pump and be discharged through the drain pipe to prevent the accumulation of impurities and pollutants to form scale, thereby maintaining the efficient operation of the water pump.

[0008] The water pump provided by the embodiment of the present application is cooled by setting a cooling channel between the rotor and the volute, so that part of the liquid entering the pump water cavity through the water inlet pipe can flow through the cooling channel and be discharged through the drain pipe under the action of the water flow while the liquid entering the pump water cavity through the water inlet pipe is driven by the impeller to enter the water outlet pipe, thereby the heat generated by the rotor during operation can be taken away by the direct contact between the liquid and the rotor to cool the rotor, improve the cooling efficiency, reduce the heat accumulation of the motor, effectively improve the working efficiency and service life of the motor, and through the optimized design of the flow channel, the water flow can take away the impurities and pollutants in the water pump and be discharged through the drain pipe to prevent the accumulation of impurities and pollutants to form scale, thereby maintaining the efficient operation of the water pump.

[0009] According to some embodiments of the present application, the pump cover is provided with the water inlet pipe away from the axial end surface of the volute, the water outlet pipe is arranged on the peripheral surface of the pump cover, and the drain pipe is arranged adjacent to the bottom of the volute.

[0010] According to some embodiments of the present application, the water inlet pipe is located on the axis of the casing and arranged coaxially with the volute, and the axis of the water outlet pipe is perpendicular to the axis of the water inlet pipe.

[0011] According to some embodiments of the present application, the axis of the drain pipe is parallel to the axis of the water inlet pipe and located directly below the axis of the water inlet pipe.

[0012] According to some embodiments of the present application, the rotor assembly further comprises a central shaft, the central shaft is rotatably arranged on the axis of the volute, and the rotor is rotatably sleeved on the central shaft.

[0013] According to some embodiments of the present application, the volute is provided with a first rotating seat away from the inner wall of the pump cover, the pump cover is provided with a second rotating seat opposite to the first rotating seat, both ends of the central shaft are rotatably inserted into the first rotating seat and the second rotating seat respectively, and the rotor is provided with a gasket between the first rotating seat and the second rotating seat, and the gasket is sleeved on the central shaft.

[0014] According to some embodiments of the present application, the stator assembly comprises a stator winding and a PCB board, the stator winding is sleeved on the volute, the PCB board is used for accessing external power supply, the PCB board is arranged on the side of the stator winding away from the pump cover, the stator winding is provided with phase line terminals, and the PCB board is provided with phase line pins in electrical contact with the phase line terminals.

[0015] According to some embodiments of the present application, the water pump further comprises an electric control box, the electric control box is externally arranged on the casing and is separately arranged from the casing, and the PCB board is electrically connected with the electric control box.

[0016] According to some embodiments of the present application, the top outer wall of the casing is provided with a connecting seat, the upper end surface of the connecting seat is provided with a sliding groove, the leading end of the sliding groove is provided with an opening, the opposite two inner walls of the sliding groove are both provided with an insertion slot in communication with the opening, the extension direction of the insertion slot is the same as that of the sliding groove, the bottom surface of the electric control box is provided with an insertion seat in the middle, the insertion seat can be slidably arranged in the sliding groove, the opposite two sides of the insertion seat are both provided with an insertion plate extending outward, the insertion plate can be inserted into the insertion slot, and the front end of the bottom surface of the electric control box is provided with a buckling piece, the buckling piece can be buckled to the front end of the connecting seat.

[0017] According to the water-cooled welding machine provided by the second aspect of the embodiments of the present application, the water pump is the water pump provided by any one of the first aspect of the embodiments of the present application.

[0018] The water-cooled welding machine provided by the above-mentioned embodiments of the present application has at least the following beneficial effects:

[0019] The water pump of the water-cooled welding machine provided by the embodiments of the present application is provided with a cooling channel between the rotor and the volute, so that part of the liquid entering the pump water cavity through the water inlet pipeline can flow through the cooling channel under the action of the water flow and be discharged through the water outlet pipeline while the liquid entering the pump water cavity through the water inlet pipeline is driven by the impeller, thereby the heat generated by the operation of the rotor can be taken away through the direct contact between the liquid and the rotor to cool the rotor, the cooling efficiency is improved, the heat accumulation of the motor is reduced, the working efficiency and service life of the motor are effectively improved, and through the optimization design of the flow channel, the impurities and pollutants in the water pump can be taken away by the water flow and discharged through the water outlet pipeline, thereby preventing the accumulation of impurities and pollutants to form scale, so as to maintain the efficient operation of the water pump.

[0020] The water pump of the water-cooled welding machine provided by the embodiment of the present application plays a cooling role and a pressure relief role at the same time through the optimized design of the flow channel. The water flow enters the cooling channel under high pressure and is discharged through the drain pipeline, so that the internal pressure of the rotor cavity can be balanced, the water pump runs more stably, and when the motor is blocked due to the blockage of the water outlet pipeline, 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 gas being trapped due to the residual gas in the pump water cavity, which affects the working efficiency. By arranging the drain pipeline at the rear end of the volute, the residual gas in the pump water cavity can be discharged through the drain pipeline, so that the water pump can enter the full load state and run more quickly, thereby improving the working efficiency.

[0021] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described below in conjunction with the drawings and embodiments, in which:

[0023] Figure 1 Structure diagram of the water pump of some embodiments of the present application;

[0024] Figure 2 Exploded view of the water pump of some embodiments of the present application;

[0025] Figure 3 Sectional view of the water pump of some embodiments of the present application;

[0026] Figure 4 Schematic diagram of the water pump of some embodiments of the present application when equipped with an electric control box;

[0027] Figure 5 Another schematic diagram of the water pump of some embodiments of the present application when equipped with an electric control box.

[0028] Among them, the reference signs are:

[0029] Housing 110; Stator cavity 111; Bottom support 112; Pump cover 120; Pump water cavity 121; Water inlet pipeline 122; Annular groove 1221; Fixed groove 1222; Water outlet pipeline 123; Second rotating seat 124; Volute 130; Rotor cavity 131; Drain pipeline 132; Cooling channel 133; First rotating seat 134; End cover 140; Gasket 150; Connection seat 160; Slide groove 161; Insert groove 162; Adapter 170; Fixed hole 171; First sealing ring 180; Second sealing ring 190;

[0030] Rotor assembly 200; rotor 210; impeller 220; central shaft 230;

[0031] Stator assembly 300; stator winding 310; PCB board 320; phase wire pin 330;

[0032] Electric control box 400; plug-in seat 410; plug-in board 420; buckling member 430; handle 440. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like component have the same or similar designations. The embodiments described below are presented by way of example only and are not intended to limit the present application.

[0034] In the description of the present application, it is to be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by the upper, lower, front, back, left, right and the like is based on the orientation or position relationship shown in the drawings, which is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0035] In the description of the present application, several meanings are one or more, and the meaning of multiple is two or more. Greater than, less than, more than, and the like are understood as not including the number, and above, below, and the like are understood as including the number. If the first and second are described, they are only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0036] In the description of the present application, unless otherwise explicitly defined, the words such as arrangement, installation, connection, etc. should be understood broadly, and the person skilled in the art can determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution. In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", 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 application. In the description of the present application, the illustrative description 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 application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", 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 application. In the description of the present application, the illustrative description 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.

[0037] With reference to Figures 1 to 5 According to the water pump provided by the embodiment of the present application, the water pump comprises a shell assembly, a rotor assembly 200 and a stator assembly 300. The shell assembly comprises a shell 110, a pump cover 120 and a volute 130. The pump cover 120 is in sealing connection with the front end of the shell 110. The pump cover 120 is provided with a pump water cavity 121 and water inlet and outlet pipelines 122 and 123 which are in communication with the pump water cavity 121. The volute 130 is arranged in the shell 110. The front end of the volute 130 extends to the front end of the shell 110 and is in sealing connection with the shell 110. The volute 130 is provided with a rotor cavity 131 which is in communication with the pump water cavity 121. The rear end of the volute 130 is provided with a water discharge pipeline 132 which extends to the outside of the shell 110. An annular stator cavity 111 is formed between the shell 110 and the volute 130. The rotor assembly 200 comprises a rotor 210 and an impeller 220. The rotor 210 is rotatably arranged 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. The two ends of the cooling channel 133 are in communication with the pump water cavity 121 and the water discharge pipeline 132, respectively. The stator assembly 300 is arranged in the stator cavity 111.

[0038] It can be understood that the water pump provided by the embodiment of the present application sets the cooling channel 133 between the rotor 210 and the volute 130, so that part of the liquid entering the pump water cavity 121 through the water inlet pipe 122 can flow through the cooling channel 133 and be discharged through the water outlet pipe 132 under the action of the water flow while the liquid is driven into the water outlet pipe 123 by the impeller 220, so that the heat generated by the rotor 210 during operation can be taken away through the direct contact of the liquid with the rotor 210 to cool the rotor 210, improve the cooling efficiency, reduce the heat accumulation of the motor, effectively improve the working efficiency and service life of the motor, and through the optimized design of the flow channel, the water flow can take away the impurities and pollutants in the water pump and be discharged through the water outlet pipe 132, preventing the accumulation of impurities and pollutants to form scale, thereby maintaining the efficient operation of the water pump.

[0039] Further, the water pump provided by the embodiment of the present application plays a cooling role while playing a pressure relief role through the optimized design of the flow channel, the water flow enters the cooling channel 133 under high pressure and is discharged through the water outlet pipe 132, so that the internal pressure of the rotor cavity 131 can be balanced, the water pump runs more stably, the mechanical unstable jitter of the water pump is reduced, and when the motor is blocked due to the blockage of the water outlet pipe 123, the water flow can be discharged in time to play a pressure relief role, thereby preventing the motor from burning, effectively improving the working efficiency and service life of the motor. On the other hand, the water pump often has the problem of gas accumulation when starting to run due to the residual gas in the pump water cavity 121, which affects the working efficiency, and by setting the water outlet pipe 132 at the rear end of the volute 130, the residual gas in the pump water cavity 121 can be discharged through the water outlet pipe 132, so that the water pump can enter the full load state more quickly, improving the working efficiency.

[0040] Further, referring to Figures 1 to 5 According to some embodiments of the present application, the water inlet pipe 122 is arranged on the axial end surface of the pump cover 120 away from the volute 130, the water outlet pipe 123 is arranged on the circumferential surface of the pump cover 120, preferably, the inlet of the cooling channel 133 is communicated with the outer side of the pump water cavity 121 in the radial direction, and the water outlet pipe 132 is arranged on the outer side of the rear end of the volute 130 in the radial direction.

[0041] It can be understood that when the impeller 220 rotates, liquid outside the water pump can be sucked into the pump water cavity 121 through the water inlet pipe 122, and then discharged through the water outlet pipe 123. The liquid delivered by the pump body is not limited to water, but can also be other liquids. In this process, the rotating motion of the impeller 220 generates water flow, so that the part close to the center line of the impeller 220 in the radial direction receives less water pressure, and the area close to the outer diameter of the impeller 220 is affected by the high-pressure turbulent area, that is, the water pressure of the area on the radial outside of the pump water cavity 121, resulting in a pressure difference of high outside and low inside in the radial direction. Accordingly, the pressure of the part of the rotor cavity 131 abutting the radial outside of the pump water cavity 121, that is, the cooling channel 133, is greater than the part abutting the radial inside of the pump water cavity 121. The existence of the pressure difference forces water flow in the rotor cavity 131 to cool the rotor 210 by means of 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, without the need for an external power source to drive the cooling water flow, which can effectively reduce the cost. At the same time, through the optimization design of the flow channel, the inlet of the cooling channel 133 is connected to the radial outside of the pump water cavity 121, and the outlet of the cooling channel 133, that is, the water outlet pipe 132, is arranged on the radial outside of the rear end of the volute 130, so as to utilize the high-pressure turbulent flow to increase the speed of the cooling water flow into and out of the cooling channel 133, thereby faster carrying away the heat of the rotor 210 and improving the heat dissipation efficiency.

[0042] Preferably, in the embodiments of the present application, the water outlet pipe 132 is arranged adjacent to the bottom of the volute 130, so as to utilize the high and low water potential to increase the speed of the cooling liquid discharged through the water outlet pipe 132 while utilizing the high-pressure turbulent flow on the radial outside of the pump water cavity 121, thereby reducing the hydraulic loss, faster carrying away the heat of the rotor 210, improving the heat dissipation efficiency, and ensuring the effective discharge of the cooling liquid to prevent water accumulation.

[0043] Further, with reference to Figure 3 According to some embodiments of the present application, the water inlet pipe 122 is located on the axis of the casing 110 and arranged coaxially 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 water outlet pipe 132 is parallel to the axis of the water inlet pipe 122 and located directly below the axis of the water inlet pipe 122.

[0044] It can be understood that this design is beneficial to simplify the connection of the pipes, reduce the installation complexity, and also helps to optimize the flow channel, thereby improving the efficiency of fluid transmission.

[0045] Further, with reference to Figure 3According to some embodiments of the present application, the shell assembly further comprises an end cover 140, which is used to open or close the rear end of the casing 110, so as to facilitate the disassembly of the water pump, maintenance and repair. The drain pipe 132 extends to and out of the end cover 140, and the drain pipe 132 and the end cover 140 are in sealed connection. Thus, a closed stator cavity 111 is formed between the casing 110, the volute 130 and the end cover 140, so as to prevent external liquid from entering the stator cavity 111 and causing short circuit.

[0046] Further, referring to Figure 3 According to some embodiments of the present application, the pump cover 120 and the front end of the casing 110 are in sealed connection through a first sealing ring 180, so as to avoid the leakage of liquid in the pump water cavity 121. The volute 130 and the casing 110 are designed in an integrated manner, so as to simplify the manufacturing process and assembly process, reduce the production and processing cost, and improve the work efficiency.

[0047] Further, referring to Figure 3 According to some embodiments of the present application, the rotor assembly 200 further comprises a central shaft 230, which is rotatably arranged on the axis of the volute 130. The rotor 210 is rotatably sleeved on the central shaft 230, so as to improve the stability of the rotor 210 during rotation, and reduce the vibration and noise caused by imbalance.

[0048] Further, referring to Figure 3 According to some embodiments of the present application, the volute 130 is provided with a first rotating seat 134 away from the inner wall of the pump cover 120. The pump cover 120 is provided with a second rotating seat 124 opposite to the first rotating seat 134. The two ends of the central shaft 230 are rotatably inserted into the first rotating seat 134 and the second rotating seat 124, respectively. The rotor 210 and the first rotating seat 134 and the second rotating seat 124 are both provided with a gasket 150, which is sleeved on the central shaft 230. This further reduces the vibration of the rotor 210 during operation, and improves the stability of the system.

[0049] Further, referring to Figure 2 and Figure 3 According to some embodiments of the present application, the stator assembly 300 comprises a stator winding 310 and a PCB board 320. The stator winding 310 is sleeved on the volute 130. The PCB board 320 is used to access external power supply. The PCB board 320 is arranged on the side of the stator winding 310 away from the pump cover 120. The stator winding 310 has phase line terminals. The PCB board 320 is provided with phase line pins 330 in electrical contact with the phase line terminals.

[0050] It can be understood that the user can open the end cover 140 to make electrical connection, which simplifies the process of electrical connection and facilitates the docking of the stator winding 310 and the external power supply.

[0051] Preferably, according to some embodiments of the present application, the stator winding 310 is arranged close to the volute 130, and the volute 130 is preferably made of a material with high thermal conductivity, corrosion resistance, rust prevention and the like, such as aluminum alloy and the like. The material can not only improve the heat dissipation efficiency, but also help to reduce the weight and control the cost.

[0052] It can be understood that, by arranging 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 cooling liquid in the cooling channel 133, thereby cooling the rotor 210 and the stator winding 310, improving the heat dissipation efficiency and ensuring the stability of the system.

[0053] Further, referring to Figure 4 and Figure 5 , according to some embodiments of the present application, the water pump further comprises an electric control box 400, which is arranged outside the casing 110 and is separate from the casing 110. The PCB 320 is electrically connected to the electric control box 400, which is convenient for disassembly and maintenance in the later stage, and also facilitates the management of electrical connection.

[0054] Further, according to some embodiments of the present application, the casing 110 or the end cover 140 is provided with a cable joint, which is a sealed, waterproof and dustproof joint. The cable joint can be locked by screws. The PCB 320 can lead out a wire to be connected to the cable joint in a sealed manner, and after being extended out of the casing 110 or the end cover 140 through the cable joint, the PCB 320 is electrically connected to the electric control box 400.

[0055] Further, referring to Figure 1 , Figure 4 and Figure 5 , according to some embodiments of the present application, the top outer wall of the casing 110 is provided with a connecting seat 160, the upper end surface of the connecting seat 160 is provided with a sliding groove 161, the leading end of the sliding groove 161 is provided with an opening, the opposite inner walls of the sliding groove 161 are both provided with a plug slot 162 communicating with the opening, the extension direction of the plug slot 162 is the same as that of the sliding groove 161, the bottom surface of the electric control box 400 is provided with a plug-in seat 410, the plug-in seat 410 can be slidably arranged in the sliding groove 161, the opposite sides of the plug-in seat 410 are both provided with an outwardly extending plug plate 420, the plug plate 420 can be plugged into the plug slot 162, and the front end of the bottom surface of the electric control box 400 is provided with a buckling member 430, which can be buckled to the front end of the connecting seat 160.

[0056] It can be understood that when the electric control box 400 is installed, the user inserts the two plug plates 420 into the two insertion grooves 162 respectively, the plug plates 420 play a limiting and guiding role, so that the plug-in seat 410 moves along the sliding groove 161 until the front end of the electric control box 400 reaches the innermost part of the sliding groove 161, so that the buckling piece 430 at the bottom of the front end of the electric control box 400 can be buckled on the front end of the connecting seat 160. The electric control box 400 can be removed by only releasing the buckling piece 430 and pulling out the electric control box 400. The structure is simple and convenient to operate. It is not only convenient for quick installation, but also can ensure the stability of the installation of the electric control box 400, and reduce the failure rate caused by loosening.

[0057] Further, referring to Figure 1 , according to some embodiments of the application, the width of the insertion groove 162, that is, the distance between the opposite two side walls, gradually decreases along the extension direction of the sliding groove 161, and the minimum width of the insertion groove 162 is not less than the width of the plug plate 420, and preferably the minimum width of the insertion groove 162 is equal to the width of the plug plate 420, so as to facilitate the stable installation of the electric control box 400. It can be understood that by designing the width of the insertion groove 162 at the opening of the sliding groove 161 to be greater than the width of the plug plate 420, the user can easily insert the plug plate 420 into the insertion groove 162 without frequent positioning, thereby improving work efficiency.

[0058] Further, according to some embodiments of the application, the insertion groove 162 can be provided with a variable section with gradually decreasing width at the front part, and a flat section with constant width equal to the width of the plug plate 420 at the rear part, so that after the plug plate 420 is inserted into the flat section, the electric control box 400 can be stably installed. The specific extension length of the variable section and the flat section can be determined according to actual conditions, which is not limited here.

[0059] Further, referring to Figure 4 and Figure 5 , according to some embodiments of the application, the opposite two side walls of the electric control box 400 are provided with handles 440, so as to facilitate the user to use.

[0060] Further, referring to Figure 1 , according to some embodiments of the application, the connecting seat 160 is arranged at the middle part of the top outer wall of the cabinet 110, and the sliding groove 161 extends along the axial direction of the cabinet 110, so as to optimize the structure layout and facilitate the user to use.

[0061] Further, referring to Figure 1 , according to some embodiments of the application, the bottom of the cabinet 110 is provided with a bottom support 112 on the opposite two sides, so as to support the water pump.

[0062] Further, referring to Figures 1 to 5According to some embodiments of the present application, the water inlet pipe 122 is sleeved with the adapter 170, the water inlet pipe 122 is sequentially provided with an annular groove 1221 and a fixing groove 1222 in the direction close to the pump cover 120, the annular groove 1221 is sleeved with a second sealing ring 190, the adapter 170 is sealingly connected with the water inlet pipe 122 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 arranged in the fixing hole 171, and the fixing groove 1222 is fixedly connected with the fixing hole 171 through the bolt.

[0063] It can be understood that, through the design of the adapter 170, appropriate specifications of the adapter 170 can be selected according to different application scenarios, and the adaptability of the water pump in different environments is enhanced. By arranging the annular groove 1221 on the water inlet pipe 122 and sleeving the second sealing ring 190 in the annular groove 1221, a good sealing connection between the adapter 170 and the water inlet pipe 122 can be formed, liquid leakage is effectively prevented, and normal operation of the system is ensured. The adapter 170 and the water inlet pipe 122 are fixedly connected through the fixing groove 1222 and the bolt in the fixing hole 171, the stability of the connection is improved, and the connection is also convenient to disassemble and replace, thereby reducing the maintenance cost.

[0064] Further, referring to Figure 5 According to some embodiments of the present application, the fixing groove 1222 is annular and coaxially arranged with the annular groove 1221, and the outer peripheral wall of the adapter 170 is uniformly provided with a plurality of fixing holes 171 in the circumferential direction.

[0065] It can be understood that this design can make the stress generated by the plurality of bolts during fastening be uniformly distributed on the circumference of the water inlet pipe 122, avoid material fatigue or deformation caused by local stress concentration, thereby improving the strength and reliability of the connection part, and at the same time, help to keep the second sealing ring 190 in a relatively uniform pressure environment, help to maintain the integrity and sealing performance of the sealing ring, and reduce the risk of cooling liquid leakage. And it is convenient for the user to fasten from multiple angles, simplifying the installation process, and it is convenient for the user to rotate the adapter 170 to adjust the position, and at the same time, when disassembly is needed, the bolts can also be conveniently unscrewed one by one, and it is not difficult to disassemble because of excessive stress on a single point.

[0066] Further, referring to Figure 5 According to some embodiments of the present application, the water inlet pipe 122 is provided with a plurality of annular grooves 1221 in the axial direction, and the specific number of the annular grooves 1221 can be 2, 3, 4 or other numbers, which can be determined according to actual conditions and is not limited here.

[0067] It can be understood that by setting multiple layers of second sealing rings 190 to form a multiple sealing barrier, the reliability of the seal and the liquid leakage prevention performance are greatly improved. Even if one layer of second sealing ring 190 fails, the other sealing layers can still continue to function, ensuring the normal operation of the system. The multiple annular grooves 1221 arranged in the axial direction can provide more fixing points, making the connection between the adapter 170 and the water inlet pipe 122 more stable. Not only can it prevent loosening caused by vibration, but also can resist external forces, ensuring 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, reducing the pressure load borne by a single second sealing ring 190, thereby reducing the risk of seal failure caused by excessive pressure, and enhancing the pressure resistance of the system. Users can choose to install second sealing rings 190 in different annular grooves 1221 according to actual needs, or adjust the number and position of second sealing rings 190 according to changes in working conditions, flexibly adjust the sealing effect, to adapt to different working conditions.

[0068] According to the water-cooled welding machine provided by the present application, the water pump of the above-mentioned embodiments is adopted, so the water-cooled welding machine should have the same beneficial effects, which will not be repeated here.

[0069] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled persons in the art without departing from the purpose of the present application.

Claims

1. A water pump characterized by comprising: The utility model relates to a water pump, comprising: a shell assembly, including a casing, a pump cover and a volute, the pump cover is sealedly connected with the front end of the casing, the pump cover is provided with a pump water cavity and the water inlet pipeline and water outlet pipeline that communicate 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 sealedly connected with the casing, the volute is provided with a rotor cavity that communicates the pump water cavity, the rear end of the volute is provided with a drain pipeline that extends to the outside of the casing, and the casing and the volute form an annular stator cavity between them; a rotor assembly, including a rotor and an impeller, the rotor is rotatably arranged in the rotor cavity, the impeller is fixedly connected to the end of the rotor and located in the pump water cavity, the rotor and the volute form a cooling channel between them, and the two ends of the cooling channel communicate with the pump water cavity and the drain pipeline respectively; a stator assembly arranged in the stator cavity; the water pump further comprises an electric control box, and the electric control box is externally arranged on the peripheral wall of the casing; the drain pipeline is arranged adjacent to the bottom of the volute, the axis of the drain pipeline is parallel to the axis of the water inlet pipeline and located directly below the axis of the water inlet pipeline, the inlet of the cooling channel communicates with the outer side of the pump water cavity in the radial direction, and the drain pipeline is arranged on the outer side of the rear end of the volute in the radial direction.

2. The water pump of claim 1, wherein the pump cover is provided with the water inlet pipeline away from the axial end surface of the volute, and the pump cover is provided with the water outlet pipeline on the peripheral surface.

3. The water pump of claim 2, wherein the water inlet pipeline is located on the axis of the casing and arranged coaxially with the volute, and the axis of the water outlet pipeline is perpendicular to the axis of the water inlet pipeline.

4. The water pump of claim 1, wherein the rotor assembly further comprises a central shaft, the central shaft is rotatably arranged on the axis of the volute, and the rotor is rotatably sleeved on the central shaft.

5. The water pump of claim 4, wherein the volute is provided with a first rotating seat away from the inner wall of the pump cover, the pump cover is provided with a second rotating seat opposite to the first rotating seat, the two ends of the central shaft are rotatably inserted into the first rotating seat and the second rotating seat respectively, and the rotor is provided with a gasket between the first rotating seat and the second rotating seat, and the gasket is sleeved on the central shaft.

6. The water pump of claim 1, wherein the stator assembly comprises a stator winding and a PCB board, the stator winding is sleeved on the volute, the PCB board is used for accessing external power supply, the PCB board is arranged on the 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 in electrical contact with the phase line terminal.

7. The water pump of claim 6, wherein the electric control box is arranged in a split mode with the casing, and the PCB board is electrically connected with the electric control box.

8. The water pump of claim 7, wherein The top outer wall of the shell is provided with a connecting seat, the upper end surface of the connecting seat is provided with a sliding groove, the leading end of the sliding groove is provided with an opening, the opposite two side inner walls of the sliding groove are each provided with an insertion slot communicating with the opening, the extension direction of the insertion slot is the same as the extension direction of the sliding groove, the middle of the bottom surface of the electric control box is provided with an insertion seat, the insertion seat can slide in the sliding groove, the opposite two sides of the insertion seat are each provided with an outwardly extending insertion plate, the insertion plate can be inserted in the insertion slot, the front end bottom of the electric control box is provided with a buckling piece, the buckling piece can be buckled to the front end of the connecting seat.

9. A water-cooled welder characterized by, A water pump comprising a water pump according to any one of claims 1 to 8.

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