Pipeline structure for cleaning machine and cleaning machine

Abstract

The utility model belongs to the technical field of cleaning electric appliances, and discloses a pipeline structure for a cleaning machine and the cleaning machine, the pipeline structure comprises a water supply pipe, a water guide pipe and a locking assembly, the water supply pipe is internally provided with a water supply cavity, a connecting piece is arranged outside the water supply pipe, and the water guide pipe is internally provided with a water guide cavity; the water guide pipe can be connected to the water supply pipe so that the water guide cavity can communicate with the water supply cavity. The locking assembly comprises a locking arm movably connected to the water guide pipe, the driving end of the locking arm is located in the water guide cavity, the locking end of the locking arm is located outside the water guide pipe and adjacent to the connecting piece, and the driving end of the locking arm is located on the flowing path of water flow in the water guide cavity and can move under the action of the water flow so that the locking end can be close to and limited to the connecting piece. According to the pipeline structure, impact force and water pressure of fluid flowing can be utilized, a power source for the locking arm to be close to and limited to the connecting piece is formed, connection reliability is improved, the risk of water leakage is reduced, and the cleaning effect of the cleaning machine is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cleaning appliance technical field, especially a pipe structure for cleaning machine and cleaning machine. BACKGROUND

[0002] The dish washer is a kind of household appliance using washing pump to pressurize cleaning water and adopt inner container waterway to deliver to spray arm, and the jet water pressure at spray hole is largely determined the cleaning performance of dish washer.

[0003] The dish washer with multiple spray arms is generally provided with lower spray arm at the bottom of inner container, and upper spray arm is arranged on tableware rack, and the installation height of tableware rack is adjustable to adapt to the cleaning space requirement of different size tableware, so the water guide pipe of upper spray arm is separated from inner container waterway, and inner container waterway has multiple water outlets of different heights, and tableware rack is adjusted to height, and water guide pipe and corresponding water outlet are communicated.The detachable communication structure has poor reliability, and in addition, the water flow pressure when cleaning water enters water guide pipe from inner container waterway will form impact on tableware rack, causes tableware rack to move, thereby causing water guide pipe to loosen, water leakage and other problems at connecting portion. SUMMARY

[0004] The first purpose of the utility model is to provide a pipe structure for cleaning machine, which can solve the problems of poor reliability of detachable communication structure of existing water guide pipe and inner container waterway, tableware rack is easily moved due to water pressure impact, and further causes water guide pipe to loosen, water leakage and other problems at connecting portion.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] First, a pipe structure for cleaning machine is provided, including water supply pipe, water guide pipe and lock connection assembly, the water supply pipe has water supply cavity inside, the water supply pipe is provided with connecting piece outside, the water guide pipe has water guide cavity inside, the water guide pipe can be connected to the water supply pipe to make the water guide cavity communicate with the water supply cavity, and along the flow direction of water flow, the water guide cavity is located downstream of water supply cavity;

[0007] The lock connection assembly includes lock connection arm movably connected to the water guide pipe, the lock connection end of the lock connection arm is located outside the water guide pipe and adjacent to the connecting piece, the driving end of the lock connection arm is located on the flow path of water flow in the water guide cavity, and can be moved under the action of water flow to make the lock connection end close to and limit on the connecting piece.

[0008] As an optional structure of the utility model, the lock connecting arm is rotatably connected to the water guide pipe, and the extension direction of the rotation axis of the lock connecting arm intersects with the extension direction of the water guide pipe, a lead-out hole is formed on the pipe body of the water guide pipe, the rotation shaft of the lock connecting arm is arranged on the pipe body, the lock connecting arm passes through the lead-out hole so that the driving end is located in the water guide cavity and the lock connecting end is located outside the water guide cavity, the lock connecting arm and the water guide pipe are arranged at an included angle in the axial direction, water flow can push the driving end so that the lock connecting end and the driving end rotate around the rotation shaft at the same time, and the lock connecting end can be rotated to clamp the connecting piece.

[0009] As an optional structure of the utility model, the included angle between the lock connecting arm and the flow direction is an acute angle along the flow direction of the fluid and the flow direction of water flow, water flow pushes the driving end to rotate towards the direction of approaching the inner cavity wall of the water guide pipe, and the lock connecting end rotates towards the direction of approaching the outer pipe wall of the water guide pipe.

[0010] The water guide pipe further comprises an elastic push plate, a push groove communicating with the lead-out hole is formed on the pipe body, one end of the elastic push plate is embedded in the push groove, and the other end extends into the lead-out hole and abuts against the lock connecting arm, and the elastic push plate always has a movement trend of elastically abutting against the lock connecting arm to partially block the lead-out hole.

[0011] As an optional structure of the utility model, the lock connecting assembly comprises a plurality of lock connecting arms, and the plurality of lock connecting arms are arranged at intervals along the circumference of the water guide pipe.

[0012] As an optional structure of the utility model, the lock connecting assembly further comprises an elastic reset piece, the elastic reset piece is connected to the lock connecting arm, the elastic reset piece applies an elastic force so that the lock connecting end always has a movement trend of moving away from and disengaging from the limiting of the connecting piece, and water flow can overcome the elastic force.

[0013] As an optional structure of the utility model, a sliding groove is formed on the pipe body of the water guide pipe, the length of the sliding groove extends along the axial direction of the water guide pipe, the lock connecting arm is slidably arranged in the sliding groove, so that the driving end is located in the water guide cavity and the lock connecting end is located outside the water guide cavity, water flow can push the driving end to move along the axial direction of the water guide pipe, and the lock connecting end can be moved to clamp the connecting piece.

[0014] As an optional structure of the utility model, the water supply pipe comprises a main water pipe and a pipe joint, the pipe joint is coaxially arranged with the water guide pipe, the pipe joint is used for connecting the water guide pipe, a first buckle is arranged on the outer circumferential side of the pipe joint to form the connecting piece, the lock connecting end has a second buckle, and the first buckle and the second buckle are clamped with each other.

[0015] As an optional structure of the utility model, the pipe joint is provided with a support wall around the periphery, the support wall has a protrusion on the side away from the pipe joint and facing away from the pipe joint to form the first buckle, and the end of the locking end has a protrusion facing the direction of the water guide pipe to form the second buckle.

[0016] The pipe structure further comprises a sealing ring in the shape of a ring, which is arranged between the pipe joint and the water guide pipe to seal the gap between the pipe joint and the water guide pipe.

[0017] As an optional structure of the utility model, the locking assembly comprises two locking arms symmetrically arranged along the axial direction of the water guide pipe, and the support wall is symmetrically arranged on both sides of the pipe joint along the axial direction of the pipe joint, under the action of water flow, the two locking arms clamp the support wall on both sides of the pipe joint, and a support rib is arranged between the pipe joint and the support wall to support the support wall.

[0018] The second object of the utility model is to provide a cleaning machine, which has the above-mentioned pipe structure and can solve the problems of poor reliability of the detachable connection structure of the existing water guide pipe and the inner container water channel, the utensil rack being easily moved due to water pressure impact, and further causing the water guide pipe to loosen at the connection, water leakage and other problems.

[0019] To achieve the above object, the utility model adopts the following technical scheme in another aspect:

[0020] Secondly, the utility model provides a cleaning machine comprising the above-mentioned pipe structure.

[0021] The utility model has the advantages of:

[0022] The pipe structure for the cleaning machine provided by the utility model has a locking assembly comprising a locking arm movably connected to the water guide pipe, the driving end of the locking arm is located on the flow path of the water flow in the water guide cavity, and the locking end of the locking arm is located outside the water guide pipe and close to the connecting piece. The water guide cavity is located downstream of the water supply cavity, and the water flow in the water supply cavity can enter the water guide cavity through the water supply cavity. The driving end can be rotated to the locking end close to and limited on the connecting piece under the action of the water flow. The mutual limiting connection of the locking arm and the connecting piece increases the reliability of the connection of the water guide pipe and the water supply pipe, avoids the loosening and falling of the water guide pipe from the water supply pipe, and moreover, the locking assembly utilizes the impact force of fluid flow and water pressure to form a power source for moving the locking arm and forming a limiting state, which on the one hand reduces the direct impact force of fluid on the water guide pipe, reduces the risk of rack movement, and on the other hand forms the limiting state of the locking assembly, increases the reliability of the connection of the water guide pipe and the water supply pipe, and reduces the risk of water leakage.

[0023] The cleaning machine provided by the utility model, through the lock connection assembly of the pipeline structure, utilizes the impact force and water pressure of water flow, forms a power source for rotating the lock connection arm to the lock connection end close to and limiting the connecting piece, reduces the direct impact force of fluid to the water guide pipe on one hand, reduces the moving risk of the shelf driving the spray arm, forms the limiting state of the lock connection assembly on the other hand, increases the reliability of the water guide pipe and the water supply pipe connection, reduces the water leakage risk, and guarantees the cleaning effect of the cleaning machine. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the structure sectional view of the pipeline structure limiting the connecting piece at the lock connection end provided by the utility model embodiment;

[0025] Figure 2 is the structure sectional view of the water guide pipe and the water supply pipe disengaging provided by the utility model embodiment;

[0026] Figure 3 is the structure sectional view of the pipeline structure disengaging the connecting piece limiting at the lock connection end provided by the utility model embodiment;

[0027] Figure 4 is the partial structure schematic view of the cleaning machine provided by the utility model embodiment.

[0028] In the drawing,

[0029] 1, water supply pipe;11, water supply cavity;12, main water pipe;13, pipe joint;14, first buckle;15, support wall;16, support rib;2, water guide pipe;21, water guide cavity;22, pipe body;221, lead-out hole;3, lock connection assembly;31, lock connection arm;311, driving end;312, lock connection end;3121, second buckle;32, elastic reset member;4, sealing element;

[0030] 10, spray arm;

[0031] 100, water flow. DETAILED DESCRIPTION

[0032] The utility model will be further explained in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all structures.

[0033] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element's mutual action relation.For the ordinary skill in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0034] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional feature between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0035] In the description of the embodiment, the orientation or position relationship of the terms "on", "under", "left", "right" and the like is based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification of operation, 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, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0036] As Figures 1 to 4 As shown in the utility model provides a pipe structure for cleaning machine includes water supply pipe 1, water guide pipe 2 and lock assembly 3, water supply pipe 1 inside has water supply cavity 11, water supply cavity 11 flows in the water flow 100 with certain pressure, water supply pipe 1 outside is provided with connecting piece.Water guide pipe 2 inside has water guide cavity 21, water guide pipe 2 can be connected to water supply pipe 1 to make water guide cavity 21 communicate water supply cavity 11, and along the flow direction of water flow 100, water guide cavity 21 is located downstream of water supply cavity 11.Water guide pipe 2 is connected to spray arm 10 away from water supply pipe 1 end, water guide pipe 2 is used to provide water flow 100 with certain pressure to spray arm 10 to provide cleaning water for cleaning machine.

[0037] The locking assembly 3 comprises a locking arm 31 movably connected to the water guide pipe 2, and a driving end 311 of the locking arm 31 is located in the flow path of the water flow 100 in the water guide cavity 21, and a locking end 312 of the locking arm 31 is located outside the water guide pipe 2 and close to the connecting piece. The water flow 100 in the water supply cavity 11 can enter the water guide cavity 21 through the water supply cavity 11, and in the flow direction of the water flow 100, the water flow 100 can push the driving end 311 to move the locking arm 31 and make the locking end 312 close to and limit the connecting piece. The locking arm 31 in the limiting state is connected to the connecting piece, which increases the reliability of the connection between the water guide pipe 2 and the water supply pipe 1, avoids loosening and falling of the water guide pipe 2 from the water supply pipe 1, and moreover, the locking assembly 3 uses the impact force and water pressure of the water flow 100 to form a power source for moving the locking arm 31 and forming the limiting state of the locking arm 31, which on the one hand reduces the direct impact of the water flow 100 on the water guide pipe 2, reduces the risk of moving the shelf, and on the other hand forms the limiting state of the locking arm 31, increases the reliability of the connection between the water guide pipe 2 and the water supply pipe 1, and reduces the risk of water leakage.

[0038] It should be noted that the pipeline structure provided by the embodiment can be applied to other pipeline butt joint communication structures for conveying pressure fluid, in addition to being applied to the spray arm 10 on the shelf of the dishwasher. The water flow 100 includes but is not limited to cleaning water with a certain pressure.

[0039] The locking arm 31 is moved to the state that the locking end 312 is close to and limited on the connecting piece through the movement of the driving end 311. Specifically, the locking arm 31 is rotatably connected to the water guide pipe 2, and the extension direction of the rotation axis of the locking arm 31 intersects with the extension direction of the water guide pipe 2. That is, the pipe body 22 of the water guide pipe 2 is provided with an exit hole 221, the rotation shaft of the locking arm 31 is arranged on the pipe body 22 and close to the exit hole 221, or the rotation shaft is arranged in the exit hole 221. The locking arm 31 passes through the exit hole 221 so that the driving end 311 is located in the water guide cavity 21 and the locking end 312 is located outside the water guide cavity 21, and the locking arm 31 and the water guide pipe 2 are arranged at an angle in the axial direction, the water flow 100 can push the driving end 311 to rotate the locking end 312 and the driving end 311 around the rotation shaft at the same time, and the locking end 312 can be rotated to clamp the connecting piece.

[0040] In order to reduce the too large blocking area of the locking end 312 in the water guide cavity 21, the angle between the locking arm 31 and the flow direction of the water flow 100 is an acute angle, so that when the water flow 100 pushes the driving end 311, as shown in Figure 1 , the driving end 311 rotates towards the direction close to the inner cavity wall of the water guide pipe 2, and is closer to the inner cavity wall, reducing the influence on the flow of the water flow 100 in the central area; correspondingly, the locking end 312 rotates towards the direction close to the outer pipe wall of the water guide pipe 2.

[0041] Since the water guide pipe 2 is usually arranged horizontally, and the water supply pipe 1 is usually arranged vertically, asFigure 4 As shown, in order to realize the connection of the water guide pipe 2 and the water supply pipe 1, the water supply pipe 1 comprises a main water pipe 12 and a pipe joint 13. The main water pipe 12 is arranged vertically, the pipe joint 13 and the water guide pipe 2 are coaxially arranged, and the pipe joint 13 is used to connect the water guide pipe 2.

[0042] In order to adapt to the rotating direction of the locking end 312, the outer circumferential side of the pipe joint 13 is provided with a first buckle 14 to form a connecting piece, the locking end 312 has a second buckle 3121, and the first buckle 14 and the second buckle 3121 are buckled with each other. The buckling connection mode is relatively simple, easy to disassemble and assemble, when there is no water flow 100 in the water guide cavity 21, the locking end 312 and the limiting connection of the connecting piece can be relatively easily released, and the water guide pipe 2 is convenient to separate from the water supply pipe 1. Specifically, the circumferential side of the pipe joint 13 is surrounded by a supporting wall 15, and the side of the supporting wall 15 away from the pipe joint 13 has a protrusion towards the direction away from the pipe joint 13 to form the first buckle 14. The end of the locking end 312 has a protrusion towards the direction of the water guide pipe 2 to form the second buckle 3121. By forming the first buckle 14 on the supporting wall 15, the structure is relatively simple, and the machining difficulty of arranging the first buckle 14 on the pipe joint 13 is reduced.

[0043] In order to increase the convenience of the locking assembly 3 to release the limiting state of the locking arm 31, the locking assembly 3 further comprises an elastic reset piece 32, the elastic reset piece 32 is connected to the locking arm 31, the elastic reset piece 32 applies an elastic force to make the locking end 312 always have a movement tendency to move away from and out of the limiting of the connecting piece, and the water flow 100 can overcome the elastic force applied by the elastic reset piece 32. In this way, when there is water flow 100 in the water guide cavity 21, the water flow 100 overcomes the elastic force applied by the elastic reset piece 32 to the locking arm 31, so that the locking arm 31 rotates to form the limiting state of the locking end 312 to the limiting of the connecting piece, as shown in Figure 1 When there is no water flow 100 in the water guide cavity 21, the elastic force applied by the elastic reset piece 32 to the locking arm 31 makes the locking arm 31 rotate in the opposite direction to move away from and out of the limiting of the connecting piece, as shown in Figure 3 Moreover, due to the existence of the elastic reset piece 32, when the water guide pipe 2 is not connected to the water supply pipe 1, the locking arm 31 is in the state that the locking arm 31 moves away from the connecting piece, avoiding the structure interference of the locking assembly 3 in the process of connecting the water guide pipe 2 to the pipe joint 13, as shown in Figure 2 The arrow in the figure shows that the water guide pipe 2 moves towards the water supply pipe 1 to be connected.

[0044] The elastic reset piece 32 can adopt a torsional spring, the torsional spring is sleeved on the rotating axis of the locking arm 31, one of the torsional arms of the torsional spring abuts against the driving end 311 or the locking end 312, and the other abuts against the pipe body 22, so that the locking end 312 keeps the second buckle 3121 away from the water guide pipe 2.

[0045] In order to increase the locking reliability of the locking assembly 3, the locking assembly 3 comprises a plurality of locking arms 31 which are arranged at intervals along the circumference of the water guide pipe 2. Figure 1 As shown in FIG. 2, the locking assembly 3 comprises two locking arms 31 which are symmetrically arranged along the axial direction of the water guide pipe 2; correspondingly, the support wall 15 is symmetrically arranged on both sides of the pipe joint 13 along the axial direction of the pipe joint 13, and the locking ends 312 of the two locking arms 31 can rotate towards the pipe joint 13 at the same time, and the two locking arms 31 can clamp the support wall 15 from both sides of the pipe joint 13 at the same time when the first buckle 14 and the second buckle 3121 are buckled with each other, thereby further improving the locking reliability of the locking assembly 3.

[0046] A support rib 16 is arranged between the pipe joint 13 and the support wall 15 to support the support wall 15, so as to avoid the deformation of the support wall 15 due to the clamping of the locking arm 31. The support rib 16 can form a T shape, and the support rib 16 extends from the outer pipe wall of the pipe joint 13 towards the support wall 15.

[0047] There are two ways to connect the pipe joint 13 and the water guide pipe 2, one is that the pipe joint 13 is inserted into the water guide pipe 2, and the other is that the pipe joint 13 is sleeved outside the water guide pipe 2. Figure 1 As shown in FIG. 2, the pipe joint 13 is inserted into the water guide pipe 2. In order to increase the sealing performance of the connection, the pipe structure further comprises a ring-shaped sealing member 4 which is arranged between the pipe joint 13 and the water guide pipe 2 to seal the gap between the pipe joint 13 and the water guide pipe 2, thereby reducing the water leakage between the pipe joint 13 and the water guide pipe 2.

[0048] In order to reduce the water leakage of the lead-out hole 221, the water guide pipe 2 further comprises an elastic push plate to partially shield and close the lead-out hole 221 formed on the pipe body 22. The pipe body 22 is provided with a push groove communicating with the lead-out hole 221, one end of the elastic push plate is embedded in the push groove, and the other end extends into the lead-out hole 221 and abuts against the locking arm 31. The elastic push plate always has a movement trend of elastically abutting against the locking arm 31 to partially block the lead-out hole 221. The elastic push plate can be used to shield part of the lead-out hole 221 on the side of the locking arm 31 facing the flow direction, and the part of the lead-out hole 221 on the side of the locking arm 31 away from the flow direction has less risk of leakage due to the shielding of the locking arm 31. In the process of pushing the driving end 311 of the water flow 100 to rotate the locking arm 31, the locking arm 31 will push the elastic push plate into the push groove against the elastic force of the elastic push plate; when there is no water flow 100 in the water guide cavity 21, the elastic force applied by the elastic return member 32 to the locking arm 31 causes the locking arm 31 to rotate in the opposite direction, so that the locking end 312 is away from the connecting member and is out of the limiting state. At this time, the elastic push plate will always abut against the locking arm 31 under the action of its own elastic force, thereby maintaining the sealing and shielding of the lead-out hole 221.

[0049] In another embodiment, the movement of the locking arm 31 to the limiting state of the locking end 312 can be achieved by the axial movement of the driving end 311. Specifically, a sliding groove is formed on the pipe body 22 of the water guide pipe 2, the length of the sliding groove extends along the axial direction of the water guide pipe 2, and the locking arm 31 is slidably arranged in the sliding groove, so that the driving end 311 is located in the water guide cavity 21 and the locking end 312 is located outside the water guide cavity 21. The driving end 311 and the locking end 312 are parallel to each other, and a connecting rod is arranged between the driving end 311 and the locking end 312, the connecting rod slides in the sliding groove; the driving end 311 is perpendicular to the flow direction of the water flow 100, when the driving end 311 moves axially, the locking end 312 can move axially to approach the connecting piece on the water supply pipe 1, and the clamping of the connecting piece is achieved.

[0050] The utility model embodiment further provides a cleaning machine, the cleaning machine includes the pipeline structure of any one of the above embodiments. The cleaning machine further includes a spray arm 10, the spray arm 10 is connected to the water guide pipe 2 of the pipeline structure, and the water guide pipe 2 is used to provide the water flow 100 flowing in the water supply pipe 1 with a certain pressure to the spray arm 10. The locking assembly 3 of the pipeline structure utilizes the impact force and water pressure of the water flow 100 flow to form a power source for the movement of the locking arm 31 and the limiting of the locking end 312 to the connecting piece, which reduces the direct impact force of the water flow 100 on the water guide pipe 2, reduces the risk of moving the spray arm 10 by the shelf, on the other hand, forms the state of the locking end 312 of the locking assembly 3 being limited, increases the reliability of the connection between the water guide pipe 2 and the water supply pipe 1, reduces the risk of water leakage, and ensures the cleaning effect of the cleaning machine.

[0051] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A piping structure for a cleaning machine, characterized in that, It includes a water supply pipe (1), a water guide pipe (2) and a locking assembly (3). The water supply pipe (1) has a water supply cavity (11) inside. A connector is provided outside the water supply pipe (1). The water guide pipe (2) has a water guide cavity (21) inside. The water guide pipe (2) can be connected to the water supply pipe (1) so that the water guide cavity (21) communicates with the water supply cavity (11). Along the flow direction of the water flow (100), the water guide cavity (21) is located downstream of the water supply cavity (11). The locking assembly (3) includes a locking arm (31) movably connected to the water guide pipe (2). The locking end (312) of the locking arm (31) is located outside the water guide pipe (2) and adjacent to the connector. The driving end (311) of the locking arm (31) is located on the flow path of the water flow (100) in the water guide cavity (21) and can move under the action of the water flow (100) so that the locking end (312) is close to and limited on the connector.

2. The pipeline structure according to claim 1, characterized in that, The locking arm (31) is rotatably connected to the water pipe (2) and the extension direction of its rotation axis intersects the extension direction of the water pipe (2). The water pipe (2) has an outlet hole (221) on its body (22). The pivot of the locking arm (31) is located on the body (22). The locking arm (31) passes through the outlet hole (221) so that the driving end (311) is located inside the water guiding cavity (21) and the locking end (312) is located outside the water guiding cavity (21). The axial direction of the locking arm (31) and the water pipe (2) is set at an angle. The water flow (100) can push against the driving end (311) so that the locking end (312) and the driving end (311) rotate around the pivot at the same time, and the locking end (312) can rotate to engage the connector.

3. The pipeline structure according to claim 2, characterized in that, Along the flow direction of the water flow (100), the angle between the locking arm (31) and the flow direction is an acute angle. The water flow (100) pushes the driving end (311) to rotate toward the inner wall of the water guide pipe (2), and the locking end (312) to rotate toward the outer wall of the water guide pipe (2); and / or, The water guide pipe (2) also includes an elastic push plate. The pipe body (22) has a push groove that connects to the outlet hole (221). One end of the elastic push plate is embedded in the push groove, and the other end extends into the outlet hole (221) and abuts against the locking arm (31). The elastic push plate always has the tendency to elastically abut against the locking arm (31) to partially block the outlet hole (221).

4. The pipeline structure according to claim 1, characterized in that, The locking assembly (3) includes a plurality of locking arms (31) which are spaced apart circumferentially along the water pipe (2).

5. The pipeline structure according to claim 1, characterized in that, The locking assembly (3) further includes an elastic reset member (32), which is connected to the locking arm (31). The elastic reset member (32) applies an elastic force to ensure that the locking end (312) always has a tendency to move away from and disengage from the limiting position of the connector, and the water flow (100) can overcome the elastic force.

6. The pipeline structure according to claim 1, characterized in that, The water guide pipe (2) has a sliding groove on its body (22). The length of the sliding groove extends along the axial direction of the water guide pipe (2). The locking arm (31) is slidably inserted into the sliding groove so that the driving end (311) is located inside the water guide cavity (21) and the locking end (312) is located outside the water guide cavity (21). The water flow (100) can push the driving end (311) to move along the axial direction of the water guide pipe (2), and the locking end (312) can move to engage the connector.

7. The pipeline structure according to any one of claims 1-6, characterized in that, The water supply pipe (1) includes a main water pipe (12) and a pipe connector (13). The pipe connector (13) and the water guide pipe (2) are coaxially arranged. The pipe connector (13) is used to connect the water guide pipe (2). A first buckle (14) is provided on the outer periphery of the pipe connector (13) to form the connector. The locking end (312) has a second buckle (3121). The first buckle (14) and the second buckle (3121) are engaged with each other.

8. The pipeline structure according to claim 7, characterized in that, The pipe connector (13) is surrounded by a support wall (15). The support wall (15) has a protrusion on the side opposite to the pipe connector (13) that faces away from the pipe connector (13) to form the first latch (14). The locking end (312) has a protrusion at its end facing the water pipe (2) to form the second latch (3121); and / or, The pipeline structure also includes an annular sealing element (4), which is disposed between the pipe joint (13) and the water guide pipe (2) to seal the gap between the pipe joint (13) and the water guide pipe (2).

9. The pipeline structure according to claim 8, characterized in that, The locking assembly (3) includes two locking arms (31) symmetrically arranged along the axial direction of the water pipe (2), and the support wall (15) is symmetrically arranged on both sides of the pipe joint (13) along the axial direction of the pipe joint (13). Under the action of water flow (100), the two locking arms (31) clamp the support wall (15) on both sides of the pipe joint (13). A support rib (16) is provided between the pipe joint (13) and the support wall (15) to support the support wall (15).

10. A cleaning machine, characterized in that, Includes the piping structure as described in any one of claims 1-9.

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