A water return device

Abstract

The invention discloses a water return device, which relates to the technical field of cooling equipment, and comprises an adapter, a fixing screw 1, a transmission box, a transmission lubrication device, a motor, a fixing screw 2 and a fixing screw 3; the transmission lubrication device, the transmission box and the adapter provided in the invention are convenient for lifting the motor to the water surface, thereby avoiding damage caused by water ingress to the motor, and thus increasing the service life of the motor; in the invention, power is transmitted through a multi-section transmission box, thereby avoiding the use of an overly long extension shaft resulting in excessive centrifugal force at its end, thereby increasing the vibration amplitude of the water pump end, and further affecting the stability and reliability of the water pump operation, and also being able to increase the transmission distance between the motor and the water pump; the transmission lubrication device, the transmission box and the adapter of the invention are all provided with a connected lubrication mechanism, thereby ensuring the stability and reliability of the transmission between the transmission lubrication device, the transmission box and the adapter, and thus meeting the needs of long-term water return work.

Description

Technical Field

[0001] The invention relates to the technical field of cooling equipment, and in particular to a water return device. Background Art

[0002] The return water device pumps circulating cooling water into the cooling tower to provide cooling water to all machines in the factory that need cooling water, and then flows back into the cooling water pit through the return water pipe. The motor of the existing return water device is installed under the water surface. After long-term operation, the mechanical seals of the water pump and the motor are prone to wear, resulting in poor sealing, making it easy for cooling water to flow into the motor through the gap, causing the motor to burn out and a high failure rate. Summary of the invention

[0003] The purpose of the present invention is to provide a water return device in order to solve the above-mentioned problems, which solves the problem that the motor of the existing water return device is installed under the water surface and runs for a long time, the mechanical seal between the water pump and the motor is prone to wear, resulting in poor sealing, making it easy for cooling water to flow into the motor through the gap, causing the motor to burn out and a high failure rate.

[0004] In order to solve the above problems, the present invention provides a technical solution: a return water device, including a cooling water pit and a water pump, and also including an adapter, a fixing screw one, a transmission box, a transmission lubrication device, a motor, a fixing screw two and a fixing screw three; the bottom of the transmission lubrication device is fixedly connected to one side of the top of the cooling water pit, and the transmission lubrication device is fixedly connected with a motor, and the motor output shaft is connected to the input end of the transmission lubrication device; there are several transmission boxes, and the head and tail of the several transmission boxes are fixedly connected by several fixing screws three, wherein the upper side of the uppermost transmission box is fixedly connected to the lower right side of the transmission lubrication device by several fixing screws two, and the lower side of the lowermost transmission box is fixedly connected to the upper side of the adapter by several fixing screws one; the right output end of the adapter is connected to the input end of the water pump.

[0005] Preferably, the specific structure of the adapter includes an outer shell, a gear cavity 1, a transmission gear 1, a transmission shaft 1, a coupling 1, a bearing 1, a lubrication hole 1, a valve cavity 1, a spring 1, a valve hole 1, a valve core 1, an end face concave toothed disk 1 and a transmission gear 2; a gear cavity 1 is provided in the central interior of the outer shell; the transmission shaft 1 is movably connected to the right interior of the gear cavity 1, a bearing 1 is provided between the outside of the transmission shaft 1 and the right interior of the gear cavity 1, a transmission gear 1 is fixedly connected to the left end of the transmission shaft 1, and the right side of the transmission shaft 1 is connected to the input end of the water pump through a coupling 1; the transmission gear 2 is movably connected to the upper side of the gear cavity 1, and the transmission The movable gear 2 is connected with the transmission gear 1, and an end face concave toothed disk 1 is fixedly connected to the upper side of the upper central axis of the transmission gear 2, and a bearing 1 is provided between the outer side of the upper central axis of the transmission gear 2 and the upper inner side of the gear chamber 1; the valve chamber 1 is provided on the upper right side of the outer shell, and a valve core 1 is movably connected to the inner side of the valve chamber 1, and a spring 1 is provided between the inner side of the lower side of the valve core and the bottom surface of the valve chamber 1; a valve hole 1 is provided inside the upper side of the valve core 1; the lubrication hole 1 is provided inside the upper right side of the outer shell, and the upper opening of the lubrication hole 1 is connected to the lower right side of the valve chamber 1, and the lower opening of the lubrication hole 1 is connected to the right inner side and the upper inner side of the gear chamber 1.

[0006] Preferably, a positioning groove is provided on the top surface of the outer shell.

[0007] Preferably, the specific structure of the transmission box includes a box body, an extended shaft, a fixed sleeve body, two bearings, two end face concave toothed discs, two valve cores, two valve holes, two valve chambers, two springs, two lubrication holes, a connecting hole and one end face convex toothed disc; the upper and lower sides of the box body are fixedly connected to the fixed sleeve body, and the right side of the box body is provided with a connecting hole; the extended shaft is movably connected to the central part of the box body, and two bearings are provided between the upper and lower sides of the extended shaft and the corresponding fixed sleeve body. The upper end of the extended shaft is fixedly connected to the second end face concave toothed disc. An end face convex toothed disk is fixedly connected to the lower end of the extended shaft; a valve cavity is provided inside the right side of the fixed sleeve body, and a valve core is movably connected inside the valve cavity, and a valve hole is provided inside the outer side of the valve core, and a lubrication hole is provided inside the right side of the fixed sleeve body; a spring is provided between the inner side of the valve core and the inside of the valve hole; one opening of the lubrication hole is connected to the inside of the valve cavity, another opening of the lubrication hole is connected to the inside of the fixed sleeve body, and another opening of the lubrication hole is connected to the opening of the connecting hole.

[0008] Preferably, a positioning groove is provided on the top surface of the box body, and a positioning convex groove is provided on the bottom surface of the box body.

[0009] Preferably, the specific structure of the transmission lubrication device includes a mounting seat, a second coupling, a second transmission shaft, an oil chamber, a third bearing, a driving gear, a driven gear, a second end face convex toothed disc, an oil inlet hole, a third valve chamber, a third spring, a third valve core and a third valve hole; the upper left side of the mounting seat is fixedly connected to a motor, an upper right side of the mounting seat is provided with an oil chamber, and a lower right side of the oil chamber is provided with an oil inlet hole; the second transmission shaft is movably connected to the right side of the mounting seat, the left side of the second transmission shaft is fixedly connected to the right side output shaft of the motor through the second coupling, and the outside of the second transmission shaft is connected to the mounting seat A bearing three is provided inside the right side of the seat, and a driving gear is fixedly connected to the right end of the transmission shaft two; the driven gear is movably connected inside the lower right side of the mounting seat, the driven gear is connected to the driving gear, and an end face convex toothed disk two is fixedly connected to the lower central axis of the driven gear; the valve cavity three is provided inside the lower right corner of the mounting seat, the right side of the valve cavity three is connected to the lower opening of the oil inlet hole, a valve core three is movably connected inside the valve cavity three, and a spring three is provided between the upper side of the valve core three and the upper side of the valve cavity three; a valve hole three is provided inside the lower side of the valve core three.

[0010] Preferably, a temperature sensor is provided inside the oil cavity, and a liquid level observation port is provided on the side of the oil cavity.

[0011] Preferably, the motor is a permanent magnet synchronous motor, and a rainproof roof is provided on the upper side of the motor.

[0012] Preferably, a pressure sensor is provided inside the water pump.

[0013] The beneficial effects of the present invention are as follows: (1) The present invention has a reasonable and simple structure, low production cost and convenient installation. The transmission lubrication device, transmission box and adapter provided here facilitate lifting the motor to the water surface, thereby avoiding damage to the motor caused by water ingress, thereby increasing the service life of the motor.

[0014] (2) In the present invention, power is transmitted through a multi-section transmission box, thereby avoiding the use of an excessively long extension shaft that causes excessive centrifugal force at its end, thereby increasing the vibration amplitude at the water pump end, thereby affecting the stability and reliability of the water pump operation, and can also increase the transmission distance between the motor and the water pump.

[0015] (3) The transmission lubrication device, transmission box and adapter of the present invention are all provided with interconnected lubrication mechanisms, thereby ensuring the stability and reliability of transmission among the transmission lubrication device, transmission box and adapter, and meeting the needs of long-term water return work.

[0016] (4) The springs 3, 2 and 1 provided in the transmission lubrication device, the transmission case and the adapter of the present invention ensure that the lubricating oil inside the transmission lubrication device, the transmission case and the adapter will not flow out after they are disassembled, thereby improving the convenience of maintenance. At the same time, the temperature sensor provided inside the oil chamber can monitor the temperature of the lubricating oil in real time so that timely measures can be taken when the temperature is abnormal, and the liquid level observation port facilitates the observation of the liquid level of the lubricating oil to ensure the normal operation of the lubrication system.

[0017] (5) The rainproof roof arranged on the upper side of the motor in the present invention can effectively prevent rainwater from entering the motor, further improving the service life of the motor.

[0018] (6) The pressure sensor disposed inside the water pump of the present invention can monitor the working pressure of the water pump in real time so as to detect and handle abnormal situations in a timely manner.

[0019] (7) During the installation process, the present invention can utilize the positioning grooves on the top surface of the housing and the positioning protrusions on the bottom surface to conveniently position and connect multiple transmission boxes, thereby improving the accuracy and efficiency of installation. The positioning grooves on the top surface of the adapter housing also facilitate the connection and positioning with the transmission box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 for Figure 1 sectional view of .

[0022] Figure 3 A schematic diagram of the structure of the adapter.

[0023] Figure 4 for Figure 3 Enlarged view of position A in the middle.

[0024] Figure 5 It is a schematic diagram of the structure of the transmission box.

[0025] Figure 6 for Figure 5 Enlarged view of position B in the middle.

[0026] Figure 7 It is a structural schematic diagram of the transmission lubrication device.

[0027] Figure 8 for Figure 7 Enlarged view of position C in the middle.

[0028] 1-Cooling water pit; 2-Water pump; 3-Adapter; 4-Fixing screw 1; 5-Transmission box; 6-Transmission lubrication device; 7-Motor; 8-Fixing screw 2; 9-Fixing screw 3; 31-Outer shell; 32-Gear cavity 1; 33-Transmission gear 1; 34-Transmission shaft 1; 35-Coupling 1; 36-Bearing 1; 37-Lubrication hole 1; 38-Valve cavity 1; 39-Spring 1; 310-Valve hole 1; 311-Valve core 1; 312-End face concave toothed disc 1; 313-Transmission gear 2; 51-Box; 52-Extension shaft; 5 3-fixed sleeve; 54-bearing two; 55-end face concave toothed disc two; 56-valve core two; 57-valve hole two; 58-valve cavity two; 59-spring two; 510-lubrication hole two; 511-connecting hole; 512-end face convex toothed disc one; 61-mounting seat; 62-coupling two; 63-drive shaft two; 64-oil cavity; 65-bearing three; 66-driving gear; 67-driven gear; 68-end face convex toothed disc two; 69-oil inlet hole; 610-valve cavity three; 611-spring three; 612-valve core three; 613-valve hole three. DETAILED DESCRIPTION

[0029] like Figure 1 and Figure 2 As shown, this specific embodiment adopts the following technical scheme: a return water device, including a cooling water pit 1 and a water pump 2, and also including an adapter 3, a fixing screw 1 4, a transmission box 5, a transmission lubrication device 6, a motor 7, a fixing screw 2 8 and a fixing screw 3 9; the bottom of the transmission lubrication device 6 is fixedly connected to one side of the top of the cooling water pit 1, and the motor 7 is fixedly connected to the transmission lubrication device 6, and the output shaft of the motor 7 is connected to the input end of the transmission lubrication device 6; there are several transmission boxes 5, and the head and tail of the several transmission boxes 5 are fixedly connected by several fixing screws 3 9, wherein the upper side of the uppermost transmission box 5 is fixedly connected to the lower right side of the transmission lubrication device 6 by several fixing screws 2 8, and the lower side of the lowermost transmission box 5 is fixedly connected to the upper side of the adapter 3 by several fixing screws 1 4; the right side output end of the adapter 3 is connected to the input end of the water pump 2.

[0030] like Figure 3 and Figure 4As shown, the specific structure of the adapter 3 includes an outer shell 31, a gear cavity 32, a transmission gear 33, a transmission shaft 34, a coupling 35, a bearing 36, a lubrication hole 37, a valve cavity 38, a spring 39, a valve hole 310, a valve core 311, an end face concave toothed disc 312 and a transmission gear 2 313; a gear cavity 32 is provided in the central interior of the outer shell 31; the transmission shaft 34 is movably connected to the right side interior of the gear cavity 32, a bearing 36 is provided between the outside of the transmission shaft 34 and the right side interior of the gear cavity 32, a transmission gear 33 is fixedly connected to the left end of the transmission shaft 34, and the right side of the transmission shaft 34 is connected to the input end of the water pump 2 through a coupling 35; the transmission gear 2 313 is movably connected to the upper side of the gear cavity 32, The transmission gear 2 313 is connected to the transmission gear 1 33, and an end face concave toothed disk 1 312 is fixedly connected to the upper side of the upper central axis of the transmission gear 2 313, and a bearing 16 is provided between the outer side of the upper central axis of the transmission gear 2 313 and the upper inner side of the gear chamber 1 32; the valve chamber 1 38 is provided on the upper right side of the outer shell 31, and a valve core 1 311 is movably connected to the inner side of the valve chamber 1 38, and a spring 1 39 is provided between the lower inner side of the valve core 1 311 and the bottom surface of the valve chamber 1 38; a valve hole 1 310 is provided on the upper inner side of the valve core 1 311; the lubrication hole 1 37 is provided on the upper right inner side of the outer shell 31, and the upper opening of the lubrication hole 1 37 is communicated with the lower right side of the valve chamber 1 38, and the lower opening of the lubrication hole 1 37 is communicated with the right inner side and the upper inner side of the gear chamber 1 32.

[0031] Wherein, a positioning groove is formed on the top surface of the outer shell 31 .

[0032] like Figure 5 and Figure 6As shown, the specific structure of the transmission box 5 includes a box body 51, an extension shaft 52, a fixed sleeve body 53, a second bearing 54, a second end face concave toothed disk 55, a second valve core 56, a second valve hole 57, a second valve cavity 58, a second spring 59, a second lubrication hole 510, a connecting hole 511 and a first end face convex toothed disk 512; the upper and lower sides of the box body 51 are fixedly connected to the fixed sleeve body 53, and the right side of the box body 51 is provided with a connecting hole 511; the extension shaft 52 is movably connected to the central interior of the box body 51, and a second bearing 54 is provided between the upper and lower sides of the extension shaft 52 and the corresponding interior of the fixed sleeve body 53, and the upper end of the extension shaft 52 is fixedly connected to the second end face concave toothed disk 55, the lower end of the extended shaft 52 is fixedly connected with an end face convex toothed disk 512; a valve cavity 58 is provided inside the right side of the fixed sleeve 53, and a valve core 56 is movably connected inside the valve cavity 58, and a valve hole 57 is provided inside the outer side of the valve core 56, and a lubrication hole 510 is provided inside the right side of the fixed sleeve 53; a spring 59 is provided between the inner side of the valve core 56 and the inside of the valve hole 57; one opening of the lubrication hole 510 is connected with the inside of the valve cavity 58, another opening of the lubrication hole 510 is connected with the inside of the fixed sleeve 53, and another opening of the lubrication hole 510 is connected with the opening of the connecting hole 511.

[0033] Among them, a positioning groove is provided on the top surface of the box body 51, and a positioning convex groove is provided on the bottom surface of the box body 51, thereby ensuring that during the installation process, the positioning groove on the top surface of the box body and the positioning convex groove on the bottom surface can be used to conveniently position and connect multiple transmission boxes, thereby improving the accuracy and efficiency of the installation.

[0034] like Figure 7 and Figure 8As shown, the specific structure of the transmission lubrication device 6 includes a mounting seat 61, a second coupling 62, a second transmission shaft 63, an oil cavity 64, a third bearing 65, a driving gear 66, a driven gear 67, a second end face convex toothed disc 68, an oil inlet hole 69, a third valve cavity 610, a third spring 611, a third valve core 612 and a third valve hole 613; the upper left side of the mounting seat 61 is fixedly connected to the motor 7, the upper right side of the mounting seat 61 is provided with an oil cavity 64, and the lower right side of the oil cavity 64 is provided with an oil inlet hole 69; the second transmission shaft 63 is movably connected to the right side of the mounting seat 61, the left side of the second transmission shaft 63 is fixedly connected to the right output shaft of the motor 7 through the second coupling 62, and the outer side of the second transmission shaft 63 is connected to the mounting seat A bearing three 65 is provided inside the right side of the seat 61, and a driving gear 66 is fixedly connected to the right end of the transmission shaft two 63; the driven gear 67 is movably connected inside the lower right side of the mounting seat 61, and the driven gear 67 is connected to the driving gear 66, and an end face convex tooth disk two 68 is fixedly connected to the lower central axis of the driven gear 67; the valve cavity three 610 is provided inside the lower right corner of the mounting seat 61, and the right side of the valve cavity three 610 is connected to the lower opening of the oil inlet hole 69, and a valve core three 612 is movably connected inside the valve cavity three 610, and a spring three 611 is provided between the upper side of the valve core three 612 and the upper side of the valve cavity three 610; a valve hole three 613 is provided inside the lower side of the valve core three 612.

[0035] Among them, a temperature sensor is provided inside the oil chamber 64, so that the temperature of the lubricating oil can be monitored in real time, so that timely measures can be taken when the temperature is abnormal. A liquid level observation port is provided on the side of the oil chamber 64, and the liquid level observation port is convenient for observing the liquid level of the lubricating oil to ensure the normal operation of the lubrication system; the motor 7 is a permanent magnet synchronous motor, and a rainproof roof is provided on the upper side of the motor 7, so as to further improve the service life of the motor; a pressure sensor is provided inside the water pump 2.

[0036] The use state of the present invention is as follows: the present invention has a reasonable and simple structure, low production cost, and convenient installation. When in use, first start the motor 7 to drive the driving gear 66 to rotate through the coupling 2 62 and the transmission shaft 2 63, and the rotation of the driving gear 66 drives the end face convex toothed disc 2 68 to rotate through the driven gear 67, and the rotation of the end face convex toothed disc 2 68 drives the extension shaft 52 to rotate through the end face concave toothed disc 2 55, and the rotation of the extension shaft 52 drives the end face concave toothed disc 1 312 to rotate through the end face convex toothed disc 1 512, and the rotation of the end face concave toothed disc 1 312 drives the transmission shaft through the transmission gear 2 313 and the transmission gear 1 33. The rotation of the transmission shaft 34 drives the water pump 2 to work through the coupling 35. The transmission lubrication device 6, the transmission box 5 and the adapter 3 provided here facilitate the lifting of the motor 7 to the water surface, thereby avoiding the motor 7 from being damaged by water ingress, and thus increasing the service life of the motor 7. In addition, the power is transmitted through the multi-section transmission box 5, thereby avoiding the use of an overly long extension shaft 52 that causes excessive centrifugal force at its end, which increases the vibration amplitude at the water pump end, thereby affecting the stability and reliability of the water pump 2. In addition, the transmission distance between the motor 7 and the water pump 2 can be increased. In addition, the transmission lubrication device The transmission lubrication device 6, the transmission box 5 and the adapter 3 are all provided with a connected lubrication mechanism, thereby ensuring the stability and reliability of the transmission between the transmission lubrication device 6, the transmission box 5 and the adapter 3, and also meeting the needs of long-term water return work. In addition, the spring three 611, the spring two 59 and the spring one 39 provided in the transmission lubrication device 6, the transmission box 5 and the adapter 3 ensure that the lubricating oil inside the transmission lubrication device 6, the transmission box 5 and the adapter 3 will not flow out after the transmission lubrication device 6, the transmission box 5 and the adapter 3 are disassembled, thereby improving the convenience of maintenance. At the same time, the temperature sensor provided in the oil chamber 64 can monitor the temperature of the lubricating oil in real time, so as to take timely measures when the temperature is abnormal. Take measures, and the liquid level observation port is convenient for observing the liquid level of the lubricating oil to ensure the normal operation of the lubrication system. The rainproof roof arranged on the upper side of the motor 7 can effectively prevent rainwater from entering the motor, further improving the service life of the motor. The pressure sensor arranged inside the water pump 2 can monitor the working pressure of the water pump in real time, so as to timely discover and deal with abnormal situations. In addition, during the installation process, the positioning grooves on the top surface of the box body and the positioning convex grooves on the bottom surface can be used to conveniently position and connect multiple transmission boxes, thereby improving the accuracy and efficiency of the installation. The positioning grooves on the top surface of the adapter shell body also help to connect and position the transmission box.

[0037] The control method in the present invention is to start manually or control through existing automation technology. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and wiring layout in detail.

[0038] In the description of the invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the 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 cannot be understood as a limitation on the invention.

[0039] In the invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation", "screw-on" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the invention according to the specific circumstances.

[0040] The above shows and describes the basic principles, main features and advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the invention. Without departing from the spirit and scope of the invention, the invention may have various changes and improvements, which shall fall within the scope of the invention to be protected. The scope of protection of the invention shall be defined by the attached claims and their equivalents.

Claims

1. A water return device, comprising a cooling water pit (1) and a water pump (2), characterized in that: It also includes an adapter (3), a fixing screw 1 (4), a transmission box (5), a transmission lubrication device (6), a motor (7), a fixing screw 2 (8) and a fixing screw 3 (9); The bottom of the transmission lubrication device (6) is fixedly connected to one side of the top of the cooling water pit (1), the top of the transmission lubrication device (6) is fixedly connected to a motor (7), and the output shaft of the motor (7) is connected to the input end of the transmission lubrication device (6); There are a plurality of transmission boxes (5), and the plurality of transmission boxes (5) are fixedly connected at the head and tail ends by a plurality of fixing screws (9), wherein the upper side of the transmission box (5) on the uppermost side is fixedly connected to the lower right side of the transmission lubrication device (6) by a plurality of fixing screws (8), and the lower side of the transmission box (5) on the lowermost side is fixedly connected to the upper side of the adapter (3) by a plurality of fixing screws (4); The right output end of the adapter (3) is connected to the input end of the water pump (2); The specific structure of the adapter (3) includes an outer shell (31), a gear chamber (32), a transmission gear (33), a transmission shaft (34), a coupling (35), a bearing (36), a lubrication hole (37), a valve chamber (38), a spring (39), a valve hole (310), a valve core (311), an end face concave toothed disc (312) and a transmission gear (313). A gear chamber 1 (32) is provided in the center of the outer shell (31); The transmission shaft (34) is movably connected to the right side of the gear chamber (32); a bearing (36) is provided between the outside of the transmission shaft (34) and the right side of the gear chamber (32); a transmission gear (33) is fixedly connected to the left end of the transmission shaft (34); and the right side of the transmission shaft (34) is connected to the input end of the water pump (2) via a coupling (35); The transmission gear 2 (313) is movably connected to the upper side of the gear chamber 1 (32), the transmission gear 2 (313) is connected to the transmission gear 1 (33), the upper side of the central axis of the upper side of the transmission gear 2 (313) is fixedly connected with the end face concave toothed disc 1 (312), and a bearing 1 (36) is provided between the outer side of the central axis of the upper side of the transmission gear 2 (313) and the inner side of the upper side of the gear chamber 1 (32); The valve chamber (38) is arranged on the upper right side of the outer shell (31), the valve chamber (38) is movably connected with a valve core (311), and a spring (39) is arranged between the lower side of the valve core (311) and the bottom surface of the valve chamber (38); A valve hole 1 (310) is provided inside the upper side of the valve core 1 (311); The lubrication hole path 1 (37) is arranged inside the upper right side of the outer shell (31), the upper opening of the lubrication hole path 1 (37) is connected to the lower right side of the valve chamber 1 (38), and the lower opening of the lubrication hole path 1 (37) is connected to the right side and upper side of the gear chamber 1 (32); The specific structure of the transmission box (5) comprises a box body (51), an extension shaft (52), a fixed sleeve body (53), a second bearing (54), a second end face concave toothed disc (55), a second valve core (56), a second valve hole (57), a second valve cavity (58), a second spring (59), a second lubrication hole (510), a connecting hole (511) and a first end face convex toothed disc (512); The upper and lower sides of the box body (51) are both fixedly connected with a fixed sleeve (53), and the right side of the box body (51) is provided with a communication hole (511); The extension shaft (52) is movably connected to the central interior of the box body (51); a second bearing (54) is provided between the upper and lower exteriors of the extension shaft (52) and the interior of the corresponding fixed sleeve (53); the upper end of the extension shaft (52) is fixedly connected to a second end face concave toothed disk (55); and the lower end of the extension shaft (52) is fixedly connected to a first end face convex toothed disk (512); A second valve cavity (58) is provided inside the right side of the fixed sleeve (53), and a second valve core (56) is movably connected inside the second valve cavity (58), and a second valve hole (57) is provided inside the outer side of the second valve core (56), and a second lubrication hole (510) is provided inside the right side of the fixed sleeve (53); A second spring (59) is provided between the inner side of the second valve core (56) and the inside of the second valve hole (57); One opening of the second lubrication hole (510) is connected to the interior of the second valve chamber (58), another opening of the second lubrication hole (510) is connected to the interior of the fixed sleeve (53), and another opening of the second lubrication hole (510) is connected to the opening of the connecting hole (511); The specific structure of the transmission lubrication device (6) includes a mounting seat (61), a second coupling (62), a second transmission shaft (63), an oil chamber (64), a third bearing (65), a driving gear (66), a driven gear (67), a second end face convex toothed disc (68), an oil inlet hole (69), a third valve chamber (610), a third spring (611), a third valve core (612) and a third valve hole (613); The upper left side of the mounting seat (61) is fixedly connected to a motor (7), the upper right side of the mounting seat (61) is internally provided with an oil chamber (64), and the lower right side of the oil chamber (64) is provided with an oil inlet hole (69); The second transmission shaft (63) is movably connected to the right interior of the mounting seat (61); the left side of the second transmission shaft (63) is fixedly connected to the right output shaft of the motor (7) through the second coupling (62); a third bearing (65) is provided between the outside of the second transmission shaft (63) and the right interior of the mounting seat (61); and the right end of the second transmission shaft (63) is fixedly connected to a driving gear (66); The driven gear (67) is movably connected to the inside of the lower right side of the mounting seat (61), the driven gear (67) is connected to the driving gear (66), and the lower central axis of the driven gear (67) is fixedly connected to an end face convex toothed disc 2 (68); The valve chamber three (610) is arranged inside the lower right corner of the mounting seat (61), the right side of the valve chamber three (610) is connected to the lower opening of the oil inlet hole (69), the valve core three (612) is movably connected inside the valve chamber three (610), and a spring three (611) is arranged between the upper side of the valve core three (612) and the upper side of the valve chamber three (610); A valve hole three (613) is provided inside the lower side of the valve core three (612).

2. The water return device according to claim 1, characterized in that: A positioning groove is provided on the top surface of the outer shell (31).

3. The water return device according to claim 1, characterized in that: A positioning groove is provided on the top surface of the box body (51), and a positioning convex groove is provided on the bottom surface of the box body (51).

4. The water return device according to claim 1, characterized in that: A temperature sensor is provided inside the oil cavity (64), and a liquid level observation port is provided on the side of the oil cavity (64).

5. The water return device according to claim 1, characterized in that: The motor (7) is a permanent magnet synchronous motor, and a rainproof roof is provided on the upper side of the motor (7).

6. The water return device according to claim 1, characterized in that: A pressure sensor is arranged inside the water pump (2).

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