An assembled water tank with replaceable water pipes

Abstract

The present invention provides a prefabricated water tank with replaceable water pipes, belonging to the technical field of water pipe installation on water tanks. The prefabricated water tank with replaceable water pipes includes a water tank, a pipeline, and a transmission member. In the present invention, the gear assembly drives the connecting gear to rotate along a first preset direction, and the connecting gear pushes the rack to move towards the direction close to the installation through hole, so that the insertion end of the pipeline passes through the installation through hole and is inserted into the inner side of the water tank, facilitating the installation of the pipeline on the water tank; the gear assembly drives the connecting gear to rotate along a second preset direction, and the connecting gear pushes the rack to move away from the installation through hole, so that the insertion end of the pipeline disengages from the installation through hole, facilitating the disassembly of the pipeline from the water tank; the smooth operation of the pipeline is realized through multiple groups of gear transmissions, and the stable connection between the pipeline and the water tank is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of water pipe installation on water tanks, and particularly relates to an assembled water tank with replaceable water pipes. Background Art

[0002] After a water tank is used for a long time, dirt will accumulate. In order to avoid affecting the use of the water tank, the water tank needs to be cleaned regularly. However, during the installation process of the existing water tank pipes, the pipes cannot smoothly enter the water tank, resulting in unstable connection between the water tank and the pipes.

[0003] Chinese Patent CN112361091A, published on February 12, 2021, discloses an assembled water-cooled box with replaceable water pipes for indoor decoration, which relates to the technical field of water-cooled boxes. The present invention includes a water-cooled box body and a water pipe. An inlet pipe opening is provided on one side surface of the water-cooled box body. An internal sealing ring is fixedly installed on the inner wall of the inlet pipe opening. The internal sealing ring can seal the opening of the water-cooled box body, so that the water in the water-cooled box body is not easy to flow out. Fixed seats are provided at the top and bottom of the inlet pipe opening. The fixed seats are fixedly connected to the water-cooled box body. A square groove is provided on the side surface of the fixed seat close to the inlet pipe opening. An extrusion block is movably sleeved inside the square groove. One end of the extrusion block away from the inlet pipe opening is rotatably connected to a threaded rod, and the threaded rod is threadedly connected to the fixed seat. A fixing ring is welded on the circumferential side surface of the water pipe. An external sealing ring is provided on the side of the fixed seat close to the inlet pipe opening. This prior art can realize the quick disassembly and assembly of the water-cooled box body and the water pipe, and has good sealing performance. During the installation of the water pipe in the water tank in the above patent, the water pipe is quickly inserted into the water tank, and one end of the water pipe cannot smoothly pass through the inlet pipe opening on the water tank and enter the water tank, resulting in unstable connection between the water tank and the water pipe. Summary of the Invention

[0004] The purpose of the present invention is to propose an assembled water tank with replaceable water pipes in view of the above-mentioned deficiencies of the prior art.

[0005] The present invention proposes an assembled water tank with replaceable water pipes, including a water tank, a pipeline, and a transmission member. An installation through hole is provided through one side end of the water tank. The transmission member includes a plurality of racks provided on the outer side wall of the pipeline, a plurality of connecting gears respectively meshing with the plurality of racks, and a plurality of gear assemblies respectively used to drive the plurality of connecting gears. When the connecting gears rotate along a first preset direction, they push the racks to move towards the direction close to the installation through hole, so that the insertion end of the pipeline moves along the axis direction of the installation through hole towards the installation through hole until it passes through the installation through hole and is inserted into the inner side of the water tank. When the connecting gears rotate along a second preset direction, they push the racks to move away from the installation through hole, so that the insertion end of the pipeline moves along the axis direction of the installation through hole away from the installation through hole until it disengages from the installation through hole.

[0006] Further, it further includes a rubber pad disposed at the water tank at the installation through-hole for filling the gap at the connection between the pipeline and the water tank.

[0007] Further, it further includes a housing fixed to one end of the water tank. A fixed cavity with an axis coinciding with the axis of the installation through-hole is provided inside the housing. The gear assembly and the connecting gear are both disposed in the fixed cavity. The sum of the cross-sectional areas of the pipeline and the rack is smaller than the cross-sectional area of the fixed cavity. The moving direction of the rack is parallel to the axis of the fixed cavity.

[0008] Further, the gear assembly includes an outer gear, an inner gear, a first connecting shaft, a driving gear, a driven gear, a second connecting shaft, and a bearing seat. The outer gear is rotatably disposed in the fixed cavity. The axis of the outer gear coincides with the axis of the fixed cavity. An inner hole with an axis coinciding with the axis of the outer gear is provided through the inside of the outer gear. The inner gear is disposed inside the inner hole and meshes with the outer gear. One end of the first connecting shaft is rotatably connected to the inner side wall of the housing, and the other end is sequentially connected to the inside of the inner gear and the inside of the driving gear. The driven gear meshes with the driving gear. The bearing seat is fixed to the inner side wall of the housing. One end of the second connecting shaft is rotatably connected to the bearing seat, and the other end is sequentially connected to the driven gear and the connecting gear. The axis of the first connecting shaft is parallel to the axis of the fixed cavity, and the second connecting shaft is perpendicular to the axis of the fixed cavity.

[0009] Further, the axis of the pipeline coincides with the center line of the installation through-hole. A plurality of the connecting gears are symmetrically arranged about the center line of the installation through-hole. At least one of the plurality of connecting gears is located at the lower end of the pipeline, and one of the connecting gears is located at the upper end of the pipeline.

[0010] Further, it further includes a fixed disk and a connecting rod. The fixed disk is rotatably connected to one end of the inner side wall of the housing close to the installation through-hole. One end of the connecting rod is connected to the fixed disk, and the other end is connected to one side end of the outer gear.

[0011] Further, a chute communicating with the fixed cavity is provided through one side end of the housing away from the installation through-hole. It further includes a manual rod with one end connected to the other side end of the outer gear and the other end passing through the chute and extending out of the housing.

[0012] Further, the installation through-hole is a circular installation through-hole, and the chute is an arc-shaped chute that coincides with the center of the installation through-hole and has a radius larger than the radius of the installation through-hole when projected onto the plane where the installation through-hole is located.

[0013] Further, it further includes a limiting ring for limiting when the insertion end of the pipeline is inserted into the water tank. The limiting ring is disposed on the outer side wall of the pipeline. The sum of the cross-sectional areas of the limiting ring and the pipeline is larger than the cross-sectional area of the fixed cavity.

[0014] Further, the pipe includes a conical insertion part provided at the insertion end, and a conical through hole for inserting the conical insertion part is provided through the inner side of the rubber pad.

[0015] The prefabricated water tank with replaceable water pipes of the present invention has the following beneficial effects:

[0016] The gear assembly drives the connecting gear to rotate along the first preset direction. The connecting gear pushes the rack to move towards the installation through hole, driving the insertion end of the pipe to move closer to the installation through hole along the axial direction of the installation through hole, so that the insertion end of the pipe passes through the installation through hole and inserts into the inner side of the water tank, facilitating the installation of the pipe on the water tank; the gear assembly drives the connecting gear to rotate along the second preset direction. The connecting gear pushes the rack to move away from the installation through hole, driving the insertion end of the pipe to move away from the installation through hole along the axial direction of the installation through hole, so that the insertion end of the pipe disengages from the installation through hole, facilitating the removal of the pipe from the water tank; the stable operation of the pipe is realized through multiple sets of gear transmissions, and the stable connection between the pipe and the water tank is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings incorporated into the specification and constituting a part of the specification illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, like reference numerals are used to represent like elements. The drawings in the following description are some embodiments of the present invention, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic cross-sectional view of the outer shell and the inner side of the pipe when the pipe in the prefabricated water tank with replaceable water pipes according to the embodiment of the present invention moves towards the water tank;

[0019] Figure 2 It is a schematic cross-sectional view of the outer shell and the inner side of the pipe when the insertion end of the pipe in the prefabricated water tank with replaceable water pipes according to the embodiment of the present invention is inserted into the installation through hole;

[0020] Figure 3 It is a side view of the inner side of the outer gear in the prefabricated water tank with replaceable water pipes according to the embodiment of the present invention when viewed in cross-section;

[0021] Figure 4 It is a side view of the outer shell of the prefabricated water tank with replaceable water pipes according to the embodiment of the present invention when installed on one side end of the water tank.

[0022] In the figure: 1 - water tank, 11 - installation through - hole, 2 - pipeline, 21 - rack, 22 - limit ring, 31 - external gear, 311 - inner hole, 32 - internal gear, 33 - connecting gear, 331 - bearing seat, 332 - second connecting shaft, 34 - driving gear, 341 - first connecting shaft, 35 - driven gear, 4 - rubber pad, 41 - tapered through - hole, 5 - housing, 51 - fixed cavity, 52 - chute, 6 - fixed disk, 61 - connecting rod, 7 - manual rod. Detailed implementation manners

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other arbitrarily.

[0024] Please refer to Figures 1 to 4 The pre - assembled water tank 1 with replaceable water pipes in the embodiments of the present invention includes a water tank 1, a pipeline 2, and a transmission member. An installation through - hole 11 is provided through one side end of the water tank 1. The transmission member includes a plurality of racks 21 provided on the outer side wall of the pipeline 2, a plurality of connecting gears 33 respectively meshing with the plurality of racks 21, and a plurality of gear assemblies for respectively driving the plurality of connecting gears 33. When the connecting gear 33 rotates along the first preset direction, it pushes the rack 21 to move towards the direction close to the installation through - hole 11, so that the insertion end of the pipeline 2 moves along the axial direction of the installation through - hole 11 towards the installation through - hole 11 until it passes through the installation through - hole 11 and inserts into the inner side of the water tank 1. When the connecting gear 33 rotates along the second preset direction, it pushes the rack 21 to move towards the direction away from the installation through - hole 11, so that the insertion end of the pipeline 2 moves along the axial direction of the installation through - hole 11 away from the installation through - hole 11 until it disengages from the installation through - hole 11.

[0025] Here, the gear assembly drives the connecting gear 33 to rotate along a first preset direction. The connecting gear 33 pushes the rack 21 to move in a direction close to the mounting through-hole 11, driving the insertion end of the pipe 2 to move close to the mounting through-hole 11 along the axial direction of the mounting through-hole 11, so that the insertion end of the pipe 2 passes through the mounting through-hole 11 and is inserted into the inner side of the water tank 1, facilitating the installation of the pipe 2 on the water tank 1; the gear assembly drives the connecting gear 33 to rotate along a second preset direction. The connecting gear 33 pushes the rack 21 to move in a direction away from the mounting through-hole 11, driving the insertion end of the pipe 2 to move away from the mounting through-hole 11 along the axial direction of the mounting through-hole 11, so that the insertion end of the pipe 2 disengages from the mounting through-hole 11, facilitating the removal of the pipe 2 from the water tank 1; the stable operation of the pipe 2 is realized through multiple sets of gear transmissions, and the stable connection between the pipe 2 and the water tank 1 is realized.

[0026] As the prefabricated water tank with replaceable water pipes in this embodiment, it may further include a rubber gasket 4 provided at the position of the water tank 1 where the mounting through-hole 11 is located, for filling the gap at the connection between the pipe 2 and the water tank 1. The rubber gasket 4 is provided at the position of the mounting through-hole 11 on the outer side wall of the water tank 1, and the rubber gasket 4 can be adhered to the outer side wall of the water tank 1. The middle part of the pipe 2 is provided with a butting end whose cross-sectional area is larger than that of the mounting through-hole 11. When the insertion end of the pipe 2 is inserted into the mounting through-hole 11, the butting end of the pipe 2 abuts against the outer side wall of the water tank 1, and there is a gap between the butting end of the pipe 2 and the water tank 1. At this time, the rubber gasket 4 is provided on the outer side wall of the water tank 1, which can be used to fill the gap at the connection between the pipe 2 and the water tank 1, thereby enhancing the waterproof performance of the connection between the pipe 2 and the water tank 1. The middle part of the rubber gasket 4 is provided with a first insertion through-hole for the pipe 2 to pass through. When the insertion end of the pipe 2 passes through the first insertion through-hole and the mounting through-hole 11 in sequence, the butting end of the pipe 2 abuts against the rubber gasket 4, and the rubber gasket 4 can also generate friction with the butting end of the pipe 2, thereby enhancing the connection effect between the pipe 2 and the water tank 1.

[0027] As the prefabricated water tank with replaceable water pipes in this embodiment, it may further include a housing 5 fixed to one end of the water tank 1. The housing 5 is provided with a fixed cavity 51 whose axis coincides with the axis of the mounting through-hole 11. The gear assembly and the connecting gear 33 are both arranged in the fixed cavity 51. The sum of the cross-sectional areas of the pipe 2 and the rack 21 is smaller than the cross-sectional area of the fixed cavity 51, and the moving direction of the rack 21 is parallel to the axis of the fixed cavity 51. The water outlet of the water tank 1 is arranged at one end of the mounting through-hole 11 of the water tank 1, and the housing 5 covers the water outlet of the water tank 1. The axis of the pipe 2 coincides with the axis of the mounting through-hole 11, that is, the axis of the pipe 2 coincides with the axis of the fixed cavity 51. The connecting gear 33 pushes the rack 21 to move, and the rack 21 moves along a straight line parallel to the axis of the fixed cavity 51, facilitating the insertion end of the pipe 2 to be pushed to the inner side of the mounting through-hole 11. The housing 5 can protect the pipe 2 from external impact on the side of the pipe 2.

[0028] The gear assembly may include an external gear 31, an internal gear 32, a first connecting shaft 341, a driving gear 34, a driven gear 35, a second connecting shaft 332, and a bearing seat 331. The external gear 31 is rotatably disposed within a fixed cavity 51, and the axis of the external gear 31 coincides with the axis of the fixed cavity 51. An inner hole 311 with an axis coinciding with the axis of the external gear 31 penetrates through the inner side of the external gear 31. The internal gear 32 is disposed inside the inner hole 311 and meshes with the external gear 31. One end of the first connecting shaft 341 is rotatably connected to the inner side wall of the housing 5, and the other end is sequentially connected to the inner side of the internal gear 32 and the inner side of the driving gear 34. The driven gear 35 meshes with the driving gear 34. The bearing seat 331 is fixed to the inner side wall of the housing 5. One end of the second connecting shaft 332 is rotatably connected to the bearing seat 331, and the other end is sequentially connected to the driven gear 35 and the connecting gear 33. The axis of the first connecting shaft 341 is parallel to the axis of the fixed cavity 51, and the second connecting shaft 332 is perpendicular to the axis of the fixed cavity 51. There are engaging teeth provided on the inner side wall of the external gear 31, and the internal gear 32 meshes with the engaging teeth on the inner side of the external gear 31. The external gear 31 and the internal gear 32 are coplanar, and the normal vector of the plane where the external gear 31 is located coincides with the axis of the fixed cavity 51. The cross-sectional area of the inner hole 311 of the external gear 31 is larger than the cross-sectional area of the installation through-hole 11. At least two internal gears 32 are meshed inside the external gear 31, and the cross-sectional area of the inscribed circle tangent to the internal gear 32 respectively is larger than the cross-sectional area of the installation through-hole 11, facilitating the insertion end of the pipeline 2 to pass through the inscribed circle and be inserted into the installation through-hole 11. The driving gear 34 and the driven gear 35 can both be bevel gears, and the connecting gear 33 is perpendicular to the plane where the external gear 31 is located. A plurality of racks 21 are provided on the circumferential surface of the pipeline 2, and the connecting gear 33 meshes with the gear. By rotating the external gear 31 and through the transmission route of the internal gear 32, the first connecting shaft 341, the driving gear 34, the driven gear 35, the second connecting shaft 332, the connecting gear 33, and the rack 21, the movement of the pipeline 2 is realized, and the insertion end of the pipeline 2 is passed through the installation through-hole 11 and extended into the water tank 1.

[0029] The axis of the pipe 2 can coincide with the center line of the installation through hole 11. A plurality of connecting gears 33 are symmetrically arranged with respect to the center line of the installation through hole 11. At least one connecting gear 33 of the plurality of connecting gears 33 is located at the lower end of the pipe 2, and one connecting gear 33 is located at the upper end of the pipe 2. The connecting gear 33 located at the upper end of the pipe 2 supports the pipe 2, and the connecting gear 33 located at the lower end of the pipe 2 limits the pipe 2. Four connecting gears 33 can be included. The four connecting gears 33 are symmetrically arranged, and the interval between adjacent two connecting gears 33 is 90 degrees. A connecting gear 33 is provided at the lower end of the lowest point of the pipe 2, and this connecting gear 33 meshes with the rack 21 at the lowest point on the pipe 2, so as to support the bottom of the pipe 2. A connecting gear 33 is provided at the upper end of the highest point of the pipe 2, and this connecting gear 33 meshes with the rack 21 at the highest point on the pipe 2, so as to limit the top of the pipe 2. A connecting gear 33 is provided on one side of the pipe 2, and this connecting gear 33 meshes with the rack 21 at the corresponding position on the pipe 2, so as to stop when the pipe 2 tilts to one side. A connecting gear 33 is provided on the other side of the pipe 2, and this connecting gear 33 meshes with the rack 21 at the corresponding position on the pipe 2, so as to stop when the pipe 2 tilts to the other side. Thus, through the cooperation of the four connecting gears 33, the pipe 2 can be driven to extend smoothly, avoiding the pipe 2 from tilting sideways when extending, resulting in unstable connection or damage to the connection structure, causing the consequence of being unable to install or disassemble.

[0030] As the prefabricated water tank with replaceable water pipes in this embodiment, it can further include a fixed disk 6 and a connecting rod 61. The fixed disk 6 is rotatably connected to one end of the inner side wall of the outer shell 5 close to the installation through hole 11. One end of the connecting rod 61 is connected to the fixed disk 6, and the other end is connected to one side end of the outer gear 31. A second insertion through hole can be provided in the middle of the fixed disk 6 to facilitate the pipe 2 to pass through the second insertion through hole and enter the installation through hole 11. A first bearing can be fixed inside the outer shell 5. The outer ring of the first bearing is fixedly connected to the inner side wall of the outer shell 5, and the fixed disk 6 can be sleeved on the inner ring of the first bearing. One end of the connecting rod 61 is fixedly connected to the fixed disk 6 of the first bearing, and the other end is detachably installed on the outer gear 31. The outer gear 31 is supported by the fixed disk 6 and the connecting rod 61.

[0031] A chute 52 communicating with the fixed cavity 51 can be provided through the side end of the outer shell 5 far from the installation through hole 11. It further includes a manual rod 7 with one end connected to the other side end of the outer gear 31 and the other end passing through the chute 52 and extending out of the outer shell 5. A stop portion is provided at the side end of the outer shell 5 far from the installation through hole 11, and the chute 52 can be arranged on the stop portion. By manually sliding the manual rod 7 along the chute 52, the rotation of the outer gear 31 is realized.

[0032] The mounting through hole 11 may be a circular mounting through hole, and the slide groove 52 is an arcuate slide groove whose center coincides with the mounting through hole 11 when projected onto the plane where the mounting through hole 11 is located and whose radius is greater than the radius of the mounting through hole 11. The arcuate slide groove may be semicircular, so as to facilitate the manual lever 7 to move, thereby driving the outer gear 31.

[0033] The assembled water tank with replaceable water pipes in this embodiment may also include a limiting ring 22 for limiting the insertion end of the pipe 2 when it is inserted into the water tank 1. The limiting ring 22 is arranged on the outer wall of the pipe 2, and the sum of the cross-sectional areas of the limiting ring 22 and the pipe 2 is greater than the cross-sectional area of ​​the fixed cavity 51. The limiting ring 22 may be symmetrically arranged in plurality, and the limiting ring 22 may be arranged close to the end of the rack 21 to prevent the pipe 2 from extending too long into the water tank 1.

[0034] The pipe 2 may include a tapered insertion portion arranged at the insertion end, and a tapered through hole 41 for the tapered insertion portion to be inserted is penetrated on the inner side of the rubber pad 4, so as to facilitate the insertion end of the pipe 2 to be inserted into the installation through hole 11, and friction is generated between the tapered insertion portion and the portion of the rubber pad 4 located at the tapered through hole 41, thereby enhancing the connection effect between the pipe 2 and the water tank 1 and improving the stability of the connection between the pipe 2 and the water tank 1.

[0035] The contents described above may be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present invention.

[0036] It should be noted that in the description of the present application, it should be noted that the terms "upper end", "lower end" and "bottom end" indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device 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 present application. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device comprising the elements.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembled water tank with replaceable water pipes, characterized in that: It includes a water tank (1), a pipeline (2), and transmission components. An installation through-hole (11) is provided through one end of the water tank (1). The transmission components include a plurality of racks (21) provided on the outer sidewall of the pipeline (2), a plurality of connecting gears (33) respectively meshing with the plurality of racks (21), and a plurality of gear assemblies for respectively driving the plurality of connecting gears (33). When the connecting gears (33) rotate along a first preset direction, they push the racks (21) to move towards the direction close to the installation through-hole (11), so that the insertion end of the pipeline (2) moves along the axis direction of the installation through-hole (11) towards the installation through-hole (11) until it passes through the installation through-hole (11) and inserts into the inner side of the water tank (1). When the connecting gears (33) rotate along a second preset direction, they push the racks (21) to move towards the direction away from the installation through-hole (11), so that the insertion end of the pipeline (2) moves along the axis direction of the installation through-hole (11) away from the installation through-hole (11) until it disengages from the installation through-hole (11). It further includes a housing (5) fixed to one end of the water tank (1). A fixed cavity (51) with an axis coinciding with the axis of the installation through-hole (11) is provided inside the housing (5). The gear assemblies and the connecting gears (33) are all arranged inside the fixed cavity (51). The sum of the cross-sectional areas of the pipeline (2) and the racks (21) is smaller than the cross-sectional area of the fixed cavity (51). The moving direction of the racks (21) is parallel to the axis of the fixed cavity (51). The gear assemblies include an outer gear (31), an inner gear (32), a first connecting shaft (341), a driving gear (34), a driven gear (35), a second connecting shaft (332), and a bearing seat (331). The outer gear (31) is rotatably arranged inside the fixed cavity (51). The axis of the outer gear (31) coincides with the axis of the fixed cavity (51). An inner hole (311) with an axis coinciding with the axis of the outer gear (31) is provided through the inner side of the outer gear (31). The inner gear (32) is arranged inside the inner hole (311) and meshes with the outer gear (31). One end of the first connecting shaft (341) is rotatably connected to the inner sidewall of the housing (5), and the other end is sequentially connected to the inner side of the inner gear (32) and the inner side of the driving gear (34). The driven gear (35) meshes with the driving gear (34). The bearing seat (331) is fixed to the inner sidewall of the housing (5). One end of the second connecting shaft (332) is rotatably connected to the bearing seat (331), and the other end is sequentially connected to the driven gear (35) and the connecting gear (33). The axis of the first connecting shaft (341) is parallel to the axis of the fixed cavity (51). The second connecting shaft (332) is perpendicular to the axis of the fixed cavity (51). It further includes a fixed disk (6) and a connecting rod (61). The fixed disk (6) is rotatably connected to one end of the inner sidewall of the housing (5) close to the installation through-hole (11). One end of the connecting rod (61) is connected to the fixed disk (6), and the other end is connected to one side end of the outer gear (31).A chute (52) communicating with the fixed cavity (51) is penetratingly provided on one side end of the outer shell (5) away from the mounting through hole (11), and further includes a manual rod (7) with one end connected to the other side end of the external gear (31) and the other end passing through the chute (52) and extending out of the outer shell (5).; 2. The prefabricated water tank with replaceable water pipes according to claim 1, characterized in that: It further includes a rubber pad (4) disposed at the water tank (1) at the installation through hole (11) for filling the gap at the connection between the pipeline (2) and the water tank (1).

3. The prefabricated water tank with replaceable water pipes according to claim 1 or 2, characterized in that: The axis of the pipeline (2) coincides with the center line of the installation through hole (11), and a plurality of the connecting gears (33) are symmetrically arranged about the center line of the installation through hole (11). At least one of the plurality of connecting gears (33) is located at the lower end of the pipeline (2), and one connecting gear (33) is located at the upper end of the pipeline (2).

4. The prefabricated water tank with replaceable water pipes according to claim 1, characterized in that: The installation through hole (11) is a circular installation through hole (11), and the sliding groove (52) is an arc-shaped sliding groove that coincides with the center of the installation through hole (11) when projected onto the plane where the installation through hole (11) is located and has a radius greater than the radius of the installation through hole (11).

5. The prefabricated water tank with replaceable water pipes according to claim 1, characterized in that: It further includes a limiting ring (22) for limiting the position when the insertion end of the pipeline (2) is inserted into the water tank (1). The limiting ring (22) is arranged on the outer side wall of the pipeline (2), and the sum of the cross-sectional areas of the limiting ring (22) and the pipeline (2) is greater than the cross-sectional area of the fixed cavity (51).

6. The prefabricated water tank with replaceable water pipes according to claim 2, characterized in that: The pipeline (2) includes a conical insertion part arranged at the insertion end, and a conical through hole (41) for the conical insertion part to be inserted is provided through the inner side of the rubber pad (4).

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