A three-way check valve structure for preventing side leakage of a nozzle of a scrubber

Abstract

The application discloses a three-way check valve structure for preventing side leakage of a nozzle of a floor cleaning machine, and relates to the technical field of the floor cleaning machine.The three-way check valve structure comprises a three-way pipe, the three-way pipe comprises a main pipe and two branch pipes, the main pipe is connected with a water inlet pipe of the floor cleaning machine, the branch pipes are connected with a connecting pipe, a nozzle is arranged at the end of the connecting pipe, and the three-way check valve structure further comprises: a valve block fixed in the main pipe, a stepped hole is formed in the valve block; two piston pieces are slidably arranged in the two branch pipes, water through holes are formed in the two piston pieces, the water through amount of the water through holes in the water distribution process is greater than that in the water combination process, a medium cavity is formed in the three-way pipe between the valve block and the two piston pieces; and a valve piece is arranged for controlling whether the stepped hole is opened or not, and when the stepped hole is closed, the valve piece controls the two piston pieces to move in opposite directions, so that the space in the medium cavity is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of floor washing machines, in particular to a three-way check valve structure for preventing side leakage of a nozzle of a floor washing machine. BACKGROUND

[0002] The water inlet of the existing floor washing machine is connected to a three-way pipe, as shown in the drawings, two connecting pipes are connected to the two sides of the three-way pipe, and a nozzle is connected to the connecting pipes. Figures 1-2 When spraying water, the water pressure of the water inlet is increased to make the water flow through the three-way pipe and then sprayed from the nozzle. Generally, the water pressure in the connecting pipe needs to be increased to a certain extent before the nozzle can spray water. When stopping, the water pressure of the water inlet is reduced to stop spraying water.

[0003] At present, when the floor washing machine is stopped, the nozzle is lifted. If the floor washing machine is placed horizontally, there is no pressure difference between the two ends of the three-way pipe at this time, and the floor washing machine will not leak. If it is placed obliquely, a water level pressure difference will be generated between the two ends of the three-way pipe at this time. The stored water in the connecting pipe of the high end will flow to the low end, so that the water pressure in the connecting pipe of the low end increases, thereby causing the floor washing machine to leak after stopping, which brings a poor user experience. SUMMARY

[0004] The present application aims to provide a three-way check valve structure for preventing side leakage of a nozzle of a floor washing machine to solve at least one technical problem existing in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a three-way check valve structure for preventing side leakage of a nozzle of a floor washing machine, comprising a three-way pipe, the three-way pipe comprising a main pipe and two branch pipes, the main pipe being connected to a water inlet pipe of the floor washing machine, and the branch pipes being connected to connecting pipes, and a nozzle being installed at the end of the connecting pipe, further comprising:

[0006] a valve block fixed in the main pipe, a stepped hole being formed in the valve block;

[0007] two piston members slidably installed in the two branch pipes, a water passage being formed in each of the two piston members, the water passage having a larger water flow during a flow splitting process than during a flow combining process, and a middle liquid cavity being formed in the three-way pipe between the valve block and the two piston members;

[0008] a valve member for controlling whether the stepped hole is open or not, and when the stepped hole is closed, the valve member controls the two piston members to move in opposite directions, so as to increase the space in the middle liquid cavity.

[0009] Preferably, the valve member comprises a mounting hole formed at the connection between the main pipe and the branch pipe, a top rod being slidably installed in the mounting hole, a spring being connected between the mounting hole and the top rod, a top plate being fixed to the end of the top rod and capable of being inserted into the stepped hole to close the stepped hole, and a connecting rod being rotatably connected between the top rod and the opposite surface of each of the two piston members.

[0010] Preferably, the water passage hole comprises a middle channel arranged in the piston, and the middle channel is provided with an opening facing the connecting pipe; the interior of the piston is further provided with a water passage hole for connecting the middle channel with the middle liquid cavity; the inner wall of the middle channel is fixed with a guide rod, the outer wall of the guide rod is sleeved with a water blocking sleeve, and a tension spring is arranged between the water blocking sleeve and the inner wall of the middle channel and sleeved on the guide rod; and the gap between the guide rod and the water blocking sleeve is arranged as a backflow channel.

[0011] Preferably, the side of the water blocking sleeve facing the middle channel is arranged as a conical surface, and the opening of the middle channel is arranged as a conical hole matched with the conical surface.

[0012] Preferably, the guide rod is arranged as a hollow pipe, and the end of the guide rod extending out of the middle channel is arranged as an opening, and the outer wall of the guide rod located in the middle channel is provided with a water permeable hole.

[0013] Preferably, the outer ring of the top plate and the inner ring of the stepped hole are both provided with a sealing ring, and the sealing ring is made of PTFE.

[0014] Preferably, when the top plate is inserted into the stepped hole to close the stepped hole, the rotation range of the connecting rod does not exceed the horizontal state.

[0015] Preferably, the end of the guide rod extending out of the middle channel extends out of the pipe of the branch pipe and extends into the connecting pipe.

[0016] Preferably, a plurality of ring-shaped balls are arranged in the backflow channel between the water blocking sleeve and the guide rod.

[0017] Preferably, the top rod and the connecting rod are both made of stainless steel.

[0018] Preferably, the communication holes on each piston are not less than four groups.

[0019] A scrubber comprises the above-mentioned three-way check valve structure of the scrubber nozzle.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] The present application can reduce the water pressure of the nozzle when the floor cleaning machine is tilted after stopping, because the movement of the piston reduces the amount of residual water in the connecting pipe, and the residual water in both connecting pipes continuously flows back into the middle liquid cavity, and the water flow through the water hole can be set to prolong the time of continuous backflow, and in the tilted state, the water in the connecting pipe below the three-way pipe cannot flow back into the middle liquid cavity, but under the action of negative pressure in the middle liquid cavity, the water in the lower connecting pipe is still in a state of negative pressure, and the above-mentioned two functions can separate the two connecting pipes and reduce the amount of water in the connecting pipe, so that the residual water in the connecting pipe cannot be squeezed out from the nozzle under insufficient water pressure, thereby avoiding the problem of water leakage and providing good user experience. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A schematic view of the three-way pipe in the background art of the present application in a horizontal state;

[0023] Figure 2 A schematic view of the three-way pipe in the background art of the present application in a tilted state;

[0024] Figure 3 A schematic view of the three-way pipe in the background art of the present application in a horizontal state;

[0025] Figure 4 A front view of the three-way pipe in the background art of the present application;

[0026] Figure 5 A side view of the three-way pipe in the background art of the present application;

[0027] Figure 6 A schematic view of the three-way pipe in the background art of the present application; Figure 5 A sectional view along A-A and a partial enlarged view;

[0028] Figure 7 A sectional view along A-A and a partial enlarged view; Figure 6 A sectional view along A-A and a partial enlarged view;

[0029] Figure 8 A state diagram of the three-way pipe in the background art of the present application after closing the water passage.

[0030] In the figure: 1, main pipe; 2, branch pipe; 3, water inlet pipe; 4, connecting pipe; 5, piston; 6, middle channel; 7, communication hole; 8, guide rod; 9, water blocking sleeve; 10, tension spring; 11, backflow channel; 12, mounting hole; 13, top rod; 14, spring; 15, connecting rod; 16, valve block; 17, stepped hole; 18, top plate; 19, middle liquid cavity; 20, water permeable hole; 21, conical hole. DETAILED DESCRIPTION

[0031] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0032] Please refer to Figures 1 to 8 The present application provides a technical solution: a three-way check valve structure for preventing side leakage of a nozzle of a floor cleaning machine, comprising a three-way pipe, the three-way pipe comprising a main pipe 1 and two branch pipes 2, the main pipe 1 being connected with a water inlet pipe 3 of the floor cleaning machine, and the branch pipes 2 being connected with a connecting pipe 4, and the connecting pipe 4 being provided with a nozzle at the end thereof, and further comprising:

[0033] a valve block 16 fixed in the main pipe 1, the valve block 16 being provided with a stepped hole 17 therein;

[0034] two piston members 5 respectively slidingly installed in the two branch pipes 2, and each of the two piston members 5 being provided with a water passing hole, the water passing amount of the water passing hole in the water distribution process being greater than that in the water combination process, and a middle liquid cavity 19 being formed in the three-way pipe between the valve block 16 and the two piston members 5;

[0035] a valve member for controlling whether the stepped hole 17 is opened or not, and when the stepped hole 17 is closed, the valve member controls the two piston members 5 to move in opposite directions, so as to increase the space in the middle liquid cavity 19.

[0036] The three-way check valve structure is used in the same way as the existing three-way pipe connection mode, the main pipe 1 is connected with the water inlet pipe 3 of the floor cleaning machine, and the branch pipes 2 are connected with the connecting pipe 4.

[0037] When water is sprayed, water is pressurized by the water inlet pipe 3, the valve member controls the stepped hole 17 to be opened, the middle liquid cavity 19 is communicated, then water is distributed to the connecting pipe 4 through the two branch pipes 2, flows out to the connecting pipe 4 through the water passing hole, and is sprayed out from the nozzle at the end of the connecting pipe 4, so as to complete the process of spraying water for cleaning the floor.

[0038] In the water flow hole, the water flow in the shunt process is greater than that in the confluence process, that is, when the water flow flows from the middle liquid cavity 19 to the connecting pipe 4, the water flow is greater, and the pressure loss of the water flow shunt is reduced, and vice versa, when the water flow flows from the connecting pipe 4 to the middle liquid cavity 19, the water flow is smaller, so when the scrubber stops using, the water inlet pipe 3 stops pressurizing water, at this time the valve closes the stepped hole 17, so that the middle liquid cavity 19 and the two branch pipes 2 form a closed space, and when the stepped hole 17 is closed, the valve controls the two piston members 5 to move in opposite directions, so that the space in the middle liquid cavity 19 is increased, in this process, the opposite movement of the two piston members 5 will continue to squeeze out the residual water in the branch pipe 2 and the connecting pipe 4 from the nozzle, reducing the amount of residual water in the connecting pipe 4, and as the space in the middle liquid cavity 19 increases, negative pressure will be generated in the middle liquid cavity 19, and the residual water in the connecting pipe 4 will continue to flow back to the middle liquid cavity 19 under the action of the pressure difference after the piston member 5 stops moving;

[0039] In this way, when the scrubber stops and is placed obliquely, firstly, the movement of the piston member 5 reduces the amount of residual water in the connecting pipe 4, which can reduce the water pressure on the nozzle under the inclined state of the connecting pipe 4 to a certain extent, and secondly, the residual water in the two connecting pipes 4 continues to flow back to the middle liquid cavity 19, and due to the water flow setting of the water flow hole, the time of continuous backflow can be prolonged, and under the inclined state, the water in the connecting pipe 4 below the three-way pipe cannot flow back to the middle liquid cavity 19 due to the reduction, but under the action of the negative pressure in the middle liquid cavity 19, the connecting pipe 4 below can still be in a state of negative pressure;

[0040] In summary, under the cooperation of the two, the two connecting pipes 4 are separated at the same time, and the amount of water in the connecting pipe 4 is reduced, so that the residual water in the connecting pipe 4 cannot be squeezed out from the nozzle under insufficient water pressure, thereby avoiding the problem of water leakage, and providing a good user experience.

[0041] In a more preferred embodiment, an embodiment of the valve opening or closing the stepped hole 17 is provided, which can be specifically referred to as Figure 6 and Figure 8 which are schematic diagrams in open and closed states, respectively;

[0042] The valve includes a mounting hole 12 provided at the connection between the main pipe 1 and the branch pipe 2, a top rod 13 is slidably installed in the mounting hole 12, a spring 14 is connected between the mounting hole 12 and the top rod 13, and the end of the top rod 13 is fixed with a top plate 18 which can be inserted into the stepped hole 17 and closed, and the opposite surfaces of the two piston members 5 are rotatably connected with connecting rods 15.

[0043] When the water inlet pipe 3 is pressurized, the top plate 18 is pushed out of the stepped hole 17 under the action of water pressure, the stepped hole 17 is opened, and the stepped hole 17 is communicated with the middle liquid cavity 19. At the same time, the top rod 13 moves and drives the two piston pieces 5 to move relative to each other through the connecting rod 15, so that the space in the middle liquid cavity 19 is compressed to the maximum. When the water inlet pipe 3 stops pressurizing, the top rod 13 reinserts the top plate 18 into the stepped hole 17 under the elastic force of the spring 14, the stepped hole 17 is closed, and the two piston pieces 5 move away from each other under the connection of the connecting rod 15, so that the space in the middle liquid cavity 19 becomes larger. By compressing the space in the middle liquid cavity 19 first, the negative pressure generated when the subsequent space becomes larger also becomes larger, the water return amount in the connecting pipe 4 is increased, and the water return time is prolonged, thereby further avoiding the problem of water leakage from the nozzle due to residual water in the connecting pipe 4.

[0044] In one of the more preferred embodiments, an implementation of the water passage hole with changing flow during the diverging and converging processes is provided.

[0045] The water passage hole includes a middle channel 6 opened in the piston piece 5, and the middle channel 6 is provided with an opening facing the connecting pipe 4. The inside of the piston piece 5 is also provided with a communication hole 7 for communicating the middle channel 6 with the middle liquid cavity 19. The inner wall of the middle channel 6 is fixed with a guide rod 8, the outer wall of the guide rod 8 is sleeved with a water blocking sleeve 9, and the water blocking sleeve 9 and the inner wall of the middle channel 6 are connected with a tension spring 10 sleeved on the guide rod 8. The gap between the guide rod 8 and the water blocking sleeve 9 is provided as a backflow channel 11.

[0046] During the diverging process, the water in the middle liquid cavity 19 enters the middle channel 6 through the communication hole 7, and under the action of water pressure, the water blocking sleeve 9 is opened by overcoming the tension of the tension spring 10. At this time, the water flow can directly enter the connecting pipe 4 from the middle channel 6, ensuring the communication of the water flow.

[0047] When the water inlet pipe 3 stops water inflow, the water pressure in the middle liquid cavity 19 decreases, and the water blocking sleeve 9 closes the opening of the middle channel 6 under the action of the tension of the tension spring 10. At this time, the middle channel 6 and the connecting pipe 4 are only connected through the backflow channel 11, so the residual water in the connecting pipe 4 will slowly backflow to the middle liquid cavity 19 through the backflow channel 11, that is, the converging process. Through the cooperation of the above structure, the size of the water flow in different water flow directions can be controlled, and the backflow time can be prolonged, thereby avoiding the problem of water leakage from the nozzle.

[0048] In one of the more preferred embodiments, the side of the water blocking sleeve 9 facing the middle channel 6 is provided as a conical surface, and the opening of the middle channel 6 is provided as a conical hole 21 matched therewith.

[0049] The conical surface and the conical hole 21 can position the water blocking sleeve 9 and improve the close degree of the water blocking sleeve 9 to the middle channel 6, and ensure the opening to be closed.

[0050] In one of the more preferred embodiments, the guide rod 8 is a hollow pipe, and the end extending out of the middle channel 6 is open, and the outer wall in the middle channel 6 is provided with a water permeable hole 20.

[0051] As known from the foregoing, in the inclined state, the water in the connecting pipe 4 below the tee pipe cannot flow back to the middle liquid cavity 19 due to the reduction, and thus the guide rod 8 is a hollow pipe, as long as the guide rod 8 is below the liquid level of the connecting pipe 4, the backflow process can be completed through the guide rod 8.

[0052] In one of the more preferred embodiments, the outer ring of the top plate 18 and the inner ring of the stepped hole 17 are both provided with a sealing ring, and the sealing ring is made of PTFE.

[0053] In one of the more preferred embodiments, when the top plate 18 is inserted into the stepped hole 17 to close it, the rotation amplitude of the connecting rod 15 will not exceed the horizontal state.

[0054] For details, please refer to Figure 8 The stroke of the top plate 18 in the stepped hole 17 can ensure that the piston 5 only moves away, and expand the space in the middle liquid cavity 19.

[0055] In one of the more preferred embodiments, the end of the guide rod 8 extending out of the middle channel 6 extends out of the pipe of the branch pipe 2 and extends into the connecting pipe 4.

[0056] In one of the more preferred embodiments, a plurality of annularly distributed balls are arranged in the backflow channel 11 between the water blocking sleeve 9 and the guide rod 8.

[0057] The balls can improve the smoothness of the sliding between the water blocking sleeve 9 and the guide rod 8, and also position the water blocking sleeve 9, so that the water blocking sleeve 9 and the guide rod 8 maintain a relatively concentric position, similar to the structure of a bearing, to ensure that the water blocking sleeve 9 can be closely embedded in the conical hole 21.

[0058] In one of the more preferred embodiments, the top rod 13 and the connecting rod 15 are made of stainless steel.

[0059] In order to prevent the top rod 13 and the connecting rod 15 from rusting in the tee pipe, stainless steel can be used, and other rust-proof materials or rust-proof coating can also be used on the surface of the top rod 13 and the connecting rod 15.

[0060] In one of the more preferred embodiments, the communicating holes 7 on each piston piece 5 are not less than four groups, and multiple groups of communicating holes 7 are provided so that the total flow capacity of the communicating holes 7 is greater than the flow capacity of the central passage 6 in the piston piece 5.

[0061] The scrubber comprises the above-mentioned three-way anti-side-leakage check valve structure of the scrubber nozzle, so that the water leakage problem caused by the inclined placement of the scrubber when the scrubber is turned off can be effectively solved, and good user experience is provided.

[0062] The standard parts used in the embodiment can be directly purchased from the market, and the non-standard structural parts according to the description and drawings can also be directly processed according to the existing technical knowledge without doubt, and the connection mode of each part adopts the mature conventional means in the existing technology, and the machinery, parts and equipment all adopt the conventional models in the existing technology, so specific description is not made here.

[0063] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A three-way check valve structure for preventing side leakage of a nozzle of a scrubber, comprising a three-way pipe including a main pipe (1) and two branch pipes (2), wherein the main pipe (1) is connected to a water inlet pipe (3) of the scrubber, the branch pipes (2) are connected to a connecting pipe (4), and a nozzle is installed at the end of the connecting pipe (4), characterized in that, The utility model also comprises: The valve block (16) is fixed in the main pipeline (1), and a stepped hole (17) is formed in the valve block (16); Two piston members (5) are slidably arranged in the two branch pipelines (2), and a water passing hole is formed in each of the two piston members (5); the water passing amount of the water passing hole in the water distribution process is greater than that in the water combination process; a three-way pipe is formed between the valve block (16) and the two piston members (5), and a medium cavity (19) is formed in the three-way pipe; A valve member is arranged to control the opening and closing of the stepped hole (17), and when the stepped hole (17) is closed, the valve member controls the opposite movement of the two piston members (5), so that the space in the medium cavity (19) is increased; The valve member comprises a mounting hole (12) formed at the joint of the main pipeline (1) and the branch pipeline (2), a top rod (13) is slidably arranged in the mounting hole (12), a spring (14) is connected between the mounting hole (12) and the top rod (13), and a top plate (18) capable of being inserted into the stepped hole (17) and closing the stepped hole (17) is fixed to the end of the top rod (13); the opposite surfaces of the two piston members (5) are rotatably connected with the top rod (13) through connecting rods (15); The water passing hole comprises a medium channel (6) formed in the piston member (5), and an opening is formed in the medium channel (6) towards the connecting pipe (4); a communication hole (7) is further formed in the piston member (5) to communicate the medium channel (6) with the medium cavity (19); a guide rod (8) is fixed to the inner wall of the medium channel (6); a water blocking sleeve (9) is sleeved on the outer wall of the guide rod (8); a tension spring (10) is arranged on the guide rod (8) and connected between the water blocking sleeve (9) and the inner wall of the medium channel (6); and a backflow channel (11) is formed between the guide rod (8) and the water blocking sleeve (9).

2. The walk-behind scrubber nozzle side leak prevention tee check valve structure of claim 1, wherein: The side of the water blocking sleeve (9) towards the medium channel (6) is formed as a conical surface, and the opening of the medium channel (6) is formed as a conical hole (21) matched with the conical surface.

3. The walk-behind scrubber nozzle side leak prevention tee check valve structure of claim 1, wherein: The guide rod (8) is formed as a hollow pipe, and the end of the guide rod (8) extending out of the medium channel (6) is formed as an opening; and a water permeable hole (20) is formed in the outer wall of the guide rod (8) located in the medium channel (6).

4. The walk-behind scrubber nozzle side leak prevention tee check valve structure of claim 1, wherein: Sealing rings are arranged on the outer ring of the top plate (18) and the inner ring of the stepped hole (17), and the sealing rings are made of PTFE.

5. The walk-behind scrubber nozzle side leak prevention tee check valve structure of claim 1, wherein: When the top plate (18) is inserted into the stepped hole (17) to close the stepped hole (17), the rotation range of the connecting rod (15) does not exceed the horizontal state.

6. The walk-behind scrubber nozzle side leak prevention tee check valve structure of claim 3, wherein: The end of the guide rod (8) extending out of the medium channel (6) extends out of the pipe of the branch pipeline (2) and extends into the connecting pipe (4).

7. The walk-behind scrubber nozzle side leak prevention tee check valve structure of claim 1, wherein: A plurality of rolling balls are arranged in the backflow channel (11) between the water blocking sleeve (9) and the guide rod (8) in a ring shape.

8. The walk-behind scrubber nozzle side leak prevention tee check valve structure of claim 1, wherein: The top rod (13) and the connecting rod (15) are made of stainless steel.

9. A scrubber machine characterized by: The utility model discloses a three-way valve structure of a mop nozzle side leakage prevention non-reversing valve.

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