Passive automatic hair breaking method and device for sewer pipeline of wash basin

Abstract

The invention belongs to the technical field of sewer pipeline accessories, and relates to a passive automatic hair breaking method and device for a sewer pipeline of a wash basin, and the method comprises the following steps: 1, arranging a Laval pipe in a water feeding pipeline, enabling a convergence section to be in butt joint with a water inlet of the water feeding pipeline, and enabling a diffusion section to be in butt joint with a water outlet of the water feeding pipeline; 2, an impeller is arranged at the diffusion section of the Laval pipe, so that the driving stress direction of the impeller faces the flowing direction of fluid in the Laval pipe; 3, a hair breaking device for rotary shearing is arranged on the sewer pipeline, and the rotary shearing surface of the hair breaking device is blocked in the direction of a water flow channel of the sewer pipeline; 4, the torque of the impeller is conveyed to the hair breaking device to provide shearing torque for rotary shearing of the hair breaking device; the laval pipe is additionally arranged in the water inlet and purification pipeline, power is provided for the rotary hair breaking unit through the contraction-relaxation structure of the laval pipe, secondary introduction of external electric energy or kinetic energy is not needed, and therefore pipeline blockage caused by the fact that hair enters a sewer pipeline is prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of sewer pipe accessories, and in particular relates to a passive automatic hair-crushing method and device for a sewer pipe of a wash basin. Background Art

[0002] The existing bathroom basin drain pipe cannot cut hair and is easy to get clogged. For example, although the bathroom basin is not equipped with a hair collection device, in order to prevent debris from entering the sewer, the bathroom basin is usually installed with a filter. While blocking the hair, the filter will also intercept many small particles that should not be filtered, so the filter needs to be cleaned frequently, which brings a lot of inconvenience to the user. However, if the filter is not added, over time, hair will accumulate in the sewer and adhere to other dirt to block the sewer pipe.

[0003] At present, there are two methods for unclogging sewer blockages: physical and chemical. The physical method is inefficient and has poor results, while the chemical method is highly corrosive, which not only has adverse effects on human health and the indoor environment, but also increases the difficulty of sewage treatment and has adverse effects on the natural environment.

[0004] Therefore, a hair cutting device or method for a basin drain pipe is needed to solve the above technical problems. Summary of the invention

[0005] The present invention increases the flow rate of water in the upper water pipe by using the Laval effect of the Laval tube. Since the upper and lower water pipes of the wash basin are arranged in pairs, the water flow power in the upper water pipe can be used by the lower water pipe. When the flow rate of the upper water pipe is increased, the water flow impacts the impeller to rotate, which continuously provides power for the rotating shearing hair fragmentation device in the lower water pipe.

[0006] The present invention provides the following technical solutions: a passive automatic hair-crushing method for a water pipe of a wash basin, comprising the following steps: step 1, arranging a Laval tube in series in a water supply pipe, so that the convergent section of the Laval tube is connected to the water inlet of the water supply pipe, and the diffuser section of the Laval tube is connected to the water outlet of the water supply pipe; step 2, arranging an impeller in the diffuser section of the Laval tube, so that the driving force direction of the impeller is toward the fluid flow direction in the Laval tube; step 3, arranging a rotary shearing hair-crushing device in the drain pipe, and the rotary shearing surface of the hair-crushing device is blocked in the water flow channel direction of the drain pipe; step 4, transmitting the torque of the impeller in step 2 to the hair-crushing device in step 3 to provide shearing torque for the rotary shearing of the hair-crushing device.

[0007] Preferably, in the step 3, the rotary shearing methods of the hair trimming device include: rotary cutter cutting, rotary cutting, rotary die cutting, spiral shearing, centrifugal shearing, and grinding shearing; in the step 4, the torque transmission methods include: gear transmission, belt transmission, chain transmission, shaft transmission, coupling transmission, and magnetic coupling transmission.

[0008] More preferably, the torque of the impeller is output to the outside of the Laval tube through the output shaft. The output shaft is connected to one end of the input shaft through a coupling. The other end of the input shaft extends into the water discharge channel of the lower water pipeline, and the input shaft drives the blade located in the water discharge channel to perform rotary cutting in the direction of cutting off the water flow.

[0009] The present invention also discloses a passive automatic hair trimming device for the lower water pipeline of a washbasin. This passive automatic hair trimming device adopts the above-mentioned passive automatic hair trimming method. This passive automatic hair trimming device includes: a Laval tube and a conical housing. An impeller is arranged in the diffuser section of the Laval tube;

[0010] A first bevel gear is arranged in the conical housing. The first bevel gear meshes with a second bevel gear, and the second bevel gear drives the upper moving blade to perform rotary cutting;

[0011] The impeller is torque-transmission-connected to the first bevel gear through shaft transmission or coupling transmission;

[0012] The conical housing is provided with a sewage inlet and a sewage outlet. Sewage flows in from the sewage inlet, passes through the conical housing, and then flows out from the sewage outlet; the rotary cutting surface of the upper moving blade is transversely arranged in the sewage water flow channel of the conical housing.

[0013] Preferably, the rotation axis of the first bevel gear is perpendicular to the sewage water flow direction in the conical housing, and the rotation axis of the second bevel gear is parallel to the sewage water flow direction in the conical housing.

[0014] More preferably, the first bevel gear meshes with a third bevel gear, and the third bevel gear drives the first rotary blade to perform rotary cutting. The rotary cutting surfaces of the upper moving blade and the first rotary blade are parallel and rotate in opposite directions.

[0015] More preferably, the rotation surfaces of the third bevel gear and the second bevel gear are parallel and rotate in opposite directions; the second bevel gear drives the upper moving blade to perform rotary cutting through a vertical transmission shaft, and the third bevel gear drives the first rotary blade to perform rotary cutting through a shaft sleeve;

[0016] The shaft sleeve is coaxially sleeved on the outer cylindrical surface of the vertical transmission shaft, and the shaft sleeve is rotationally connected to the vertical transmission shaft.

[0017] More preferably, a upper static blade is also fixedly arranged in the conical housing. The cutting edge of the upper static blade and the cutting edge of the upper moving blade cooperate with each other to perform relative rotary shearing motion;

[0018] A second rotary blade is also sleeved on the vertical transmission shaft. The second rotary blade rotates coaxially and synchronously with the vertical transmission shaft. The shaft section of the vertical transmission shaft sleeving the second rotary blade extends out of the end of the shaft sleeve. The blades of the second rotary blade and the first rotary blade cooperate with each other to perform a relative rotary shearing motion.

[0019] More preferably, a sealed upper and lower buckled transmission cavity housing is provided inside the conical housing. The transmission cavity housing is fixed in the inner cavity of the conical housing through rib plates or connecting rods. The transmission cavity housing includes an upper sealing shell and a lower sealing shell. The first bevel gear, the second bevel gear, and the third bevel gear are meshed inside the transmission cavity housing. The rotating shafts of the first bevel gear, the second bevel gear, and the third bevel gear respectively extend out of the transmission cavity housing. The sewage inside the conical housing flows through the periphery of the transmission cavity housing.

[0020] Preferably, the conical housing is in the shape of a frustum of a cone with a larger upper part and a smaller lower part. The sewage inlet is located on the top surface of the frustum of the cone, and the sewage outlet is located on the bottom surface of the frustum of the cone.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The present invention adds a Laval tube to the water inlet and purification pipeline. By using the contraction-dilation structure of the Laval tube, the water flow velocity is accelerated. The high-speed water flow drives the impeller inside the Laval tube to rotate rapidly, providing power for the rotary hair-cutting unit, without the need to introduce external electric energy or kinetic energy for the second time, overcoming the dependence on external energy, and achieving passive automatic hair cutting.

[0023] 2. The present invention uses a gear transmission structure in which one driving bevel gear meshes with two driven bevel gears with the same axis of rotation at the same time. Since the two driven bevel gears are respectively connected to the two rotary blades, the forward and reverse rotations of the two rotary blades are realized, improving the hair-cutting work efficiency. Therefore, the hair-cutting effect of the present invention is better.

[0024] 3. The present invention adopts a two-layer hair-cutting structure. The upper-layer blade completes primary hair cutting, and the lower-layer blade completes ultimate hair cutting, improving the hair-cutting rate. Therefore, the hair-cutting effect of the present invention is better.

[0025] 4. The present invention seals the driving bevel gear and the driven bevel gears in a sealing shell. The sealing shell adopts an upper and lower split design, which is convenient for installation and maintenance, effectively isolating the contact between water and the bevel gears and bearings, avoiding corrosion and dirt from entering the teeth of the bevel gears, and thus ensuring the smoothness of the transmission. Therefore, the present invention has better applicability and durability.

[0026] 5. The conical structure of the conical housing of the rotary hair-cutting unit of the present invention helps the sewage and hair to enter the sewer, reducing the retention of dirt. Therefore, the sewage drainage effect of the present invention is better. Description of the Drawings

[0027] Figure 1It is an installation schematic diagram of a passive automatic hair - shredding method and device for the drain pipeline under a washbasin in the present invention;

[0028] Figure 2 It is an isometric view of the overall structure of the present invention;

[0029] Figure 3 It is a sectional structural view of the rotating hair - shredding unit of the present invention.

[0030] In the figure, 1. upper cross - shaped fixing frame; 2. conical shell; 3. upper static blade; 4. upper moving blade; 5. sewage inlet; 6. left cross - shaped fixing frame; 7. linear fixing frame; 8. hose; 9. purified water outlet; 10. device housing; 11. right cross - shaped fixing frame; 12. purified water inlet; 13. Laval tube; 14. impeller; 15. first horizontal transmission shaft; 16. first deep groove ball bearing; 17. coupling; 18. second deep groove ball bearing; 19. second horizontal transmission shaft; 20. third deep groove ball bearing; 21. first bevel gear; 22. lower sealing shell; 23. second bevel gear; 24. third bevel gear; 25. bushing; 26. upper sealing shell; 27. lower cross - shaped fixing frame; 28. first rotating blade; 29. second rotating blade; 30. vertical transmission shaft; 31. sewage outlet; 32. building wall; 33. faucet; 34. washbasin; 35. hair - shredding device; 36. sewage drain pipe; 37. cabinet; 38. leg; 39. first metal braided hose; 40. second metal braided hose; 41. pre - embedded water outlet in the wall; 42. first flat key; 43. second flat key; 44. third flat key; 45. fourth flat key; 46. fifth flat key; 47. sixth flat key; 48. fourth deep groove ball bearing; 49. fifth deep groove ball bearing; 50. sixth deep groove ball bearing; 51. seventh deep groove ball bearing; 52. bevel gear support. Detailed implementation manners

[0031] Next, the related technologies in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0032] The present embodiment discloses a passive automatic hair shredding method for the downpipe of a washbasin, including the following steps: Step 1, a Laval tube is serially arranged in the upper water pipe, such that the converging section of the Laval tube is butt-connected to the water inlet of the upper water pipe, and the diverging section of the Laval tube is butt-connected to the water outlet of the upper water pipe; Step 2, an impeller is arranged in the diverging section of the Laval tube, such that the driving force direction of the impeller faces the fluid flow direction in the Laval tube; Step 3, a hair shredding device with rotary shearing is arranged in the downpipe, and the rotary shearing surface of the hair shredding device blocks the water flow channel direction of the downpipe; Step 4, the torque of the impeller in Step 2 is transmitted to the hair shredding device in Step 3 to provide shearing torque for the rotary shearing of the hair shredding device. The converging section of the Laval tube gradually narrows from the inlet, causing the incoming fluid to be forced to accelerate and compress. According to Bernoulli's principle, during this process, the pressure of the fluid decreases while the velocity increases, reaching a high speed; in the diverging section of the Laval tube, as the cross-sectional area increases, the fluid further expands and decompresses, and at the same time its velocity continues to increase to a higher level, so that the impeller located in the diverging section can be driven to rotate; the impeller transmits the torque to the hair shredding device, cutting the long hair in the downpipe into shredded hair segments, enabling the shredded hair to flow smoothly and avoiding the blockage of the downpipe caused by long hair.

[0033] Further, in Step 3, the rotary shearing methods of the hair shredding device include: rotary cutter cutting, rotary cutting, rotary die cutting, spiral shearing, centrifugal shearing, grinding shearing; in Step 4, the torque transmission methods include: gear transmission, belt transmission, chain transmission, shaft transmission, coupling transmission, magnetic coupling transmission. The hair shredding device can adopt various rotary shearing methods, and the rotary torque of the impeller in the upper water pipe can be transmitted to the downpipe through various transmission methods. Therefore, various combinations can be generated between the rotary shearing methods and torque transmission methods of the hair shredding device to meet the hair shredding requirements of different washbasin downpipes.

[0034] Furthermore, the torque of the impeller is output to the outside of the Laval tube through an output shaft. The output shaft is connected to one end of an input shaft through a coupling, and the other end of the input shaft extends into the water discharge channel of the downpipe. The input shaft drives the blade located in the water discharge channel to perform rotary cutting in the water flow direction. Since the upper and lower water pipes of the washbasin are arranged in pairs, the torque transmission method of shaft transmission is relatively reliable and has a simple structure. And since the hair is tough but the hair strands are thin, the hair strands can be cut by adopting the method of rotary blade cutting. Therefore, the combination of rotary blade cutting can meet the hair shredding requirements, and the rotary blade has a simple structure and is convenient to set.

[0035] This embodiment also discloses a passive automatic hair shredding device for the drain pipe of a washbasin. This passive automatic hair shredding device implements the above-mentioned passive automatic hair shredding method. The passive automatic hair shredding device includes: a Laval tube 13 and a conical housing 2. An impeller 14 is arranged in the diffuser section of the Laval tube 13; the fluid in the Laval tube 13 provides initial power for the impeller 14;

[0036] A first bevel gear 21 is arranged in the conical housing 2. The first bevel gear 21 meshes with a second bevel gear 23, and the second bevel gear 23 drives the upper moving blade 4 to perform rotary cutting; the bevel gear turns the power torque and provides it to the rotary blade; even the rapid rotation of a single row of blades can easily cut the hair strands to complete the hair shredding function;

[0037] The impeller 14 is torque-transmission connected to the first bevel gear 21 through shaft transmission or coupling transmission;

[0038] The conical housing 2 is provided with a sewage inlet 5 and a sewage outlet 31. Sewage flows in from the sewage inlet 5, passes through the conical housing 2, and then flows out from the sewage outlet 31; the rotary cutting surface of the upper moving blade 4 is transversely arranged in the sewage water flow channel of the conical housing 2.

[0039] Further, the rotation axis of the first bevel gear 21 is perpendicular to the sewage water flow direction in the conical housing 2, and the rotation axis of the second bevel gear 23 is parallel to the sewage water flow direction in the conical housing 2. The rotation axis of the second bevel gear 23 being parallel to the sewage water flow direction makes the setting of the rotary cutting blade simpler and more convenient. Only by fixedly arranging the rotary cutting blade on the second bevel gear 23 to rotate coaxially can the hair strands be cut by the rotary cutting blade.

[0040] Furthermore, the first bevel gear 21 meshes with a third bevel gear 24, and the third bevel gear 24 drives the first rotary blade 28 to perform rotary cutting. The rotary cutting surfaces of the upper moving blade 4 and the first rotary blade 28 are parallel and have opposite rotation directions. The rotary cutting surface of the upper moving blade 4 perpendicular to the water flow direction can transversely cut the water flow and the long hair strands carried in the water flow, which is the rotary cutting angle with the best cutting effect. And arranging multiple layers of bevel gears to mesh can provide multiple layers of rotary cutting blades. Therefore, the long hair strands can be cut multiple times simultaneously, and the hair strands can be cut into finer shredded hair segments.

[0041] Furthermore, the rotation plane of the third bevel gear 24 is parallel to that of the second bevel gear 23 and their rotation directions are opposite; the second bevel gear 23 drives the upper moving blade 4 to perform rotary cutting through the vertical transmission shaft 30, and the third bevel gear 24 drives the first rotary blade 28 to perform rotary cutting through the sleeve 25; the sleeve 25 is coaxially sleeved on the outer cylindrical surface of the vertical transmission shaft 30, and the sleeve 25 is rotatably connected to the vertical transmission shaft 30. Through the cooperation of the sleeve 25 and the vertical transmission shaft 30, multiple layers of blades, such as the upper moving blade 4 and the first rotary blade 28, can be arranged on the same side or both sides of the bevel gear meshing; when arranged on the same side, the long hair can be cut at a short distance simultaneously, and when arranged on both sides, the long hair can be cut twice at a relatively long distance. Whether to arrange them on the same side or on the upper and lower sides specifically can be determined according to the torque and rotational speed provided by the impeller 14. When the rotational speed is high, a single-layer rotary blade can cut the hair into broken hair segments, and the blades can be arranged on both sides of the bevel gear meshing. When the torque is small, the rotational speed is low, or the hair cutting effect of a single-layer rotary blade is not ideal, multiple layers of blades can be arranged on the same side of the bevel gear meshing.

[0042] Furthermore, an upper stationary blade 3 is also fixedly arranged in the conical housing 2, and the cutting edge of the upper stationary blade 3 cooperates with the cutting edge of the upper moving blade 4 to perform a relative rotary shearing motion; when the rotational speed of the blade is low or the cutting edge cannot fully cut the hair, the hair can be cut off by the way of staggered shearing of the two blades, and the cutting is performed through the cutting edge of the upper stationary blade 3 and the cutting edge of the upper moving blade 4;

[0043] A second rotary blade 29 is also sleeved on the vertical transmission shaft 30. The second rotary blade 29 rotates coaxially and synchronously with the vertical transmission shaft 30. The shaft section of the vertical transmission shaft 30 sleeving the second rotary blade 29 extends out of the end of the sleeve 25, and the cutting edge of the second rotary blade 29 cooperates with the cutting edge of the first rotary blade 28 to perform a relative rotary shearing motion. The shearing is performed by two blades rotating in opposite directions. Since the first rotary blade 28 and the second rotary blade 29 are driven by different bevel gears with opposite rotation directions respectively, the relative shearing speed is faster and the hair cutting effect is better.

[0044] Furthermore, the conical housing 2 is provided with a sealed transmission cavity housing that is buckled up and down, and the transmission cavity housing is fixed to the inner cavity of the conical housing 2 through ribs or connecting rods. The transmission cavity housing includes: an upper sealing shell 26 and a lower sealing shell 22. The first bevel gear 21, the second bevel gear 23, and the third bevel gear 24 are meshed in the transmission cavity housing. The rotating shafts of the first bevel gear 21, the second bevel gear 23, and the third bevel gear 24 extend out of the transmission cavity housing respectively, and the sewage in the conical housing 2 flows through the periphery of the transmission cavity housing. The meshing and sealing of the bevel gears in the transmission cavity housing can prevent sewage and debris in the sewage from being involved in the meshing part of the gears and affecting the meshing. At the same time, it can also prevent the gears from rusting or aging, or use non-metallic gears such as nylon and plastic to meet the high speed and low torque requirements of the blade cutting long hair.

[0045] Furthermore, the conical shell 2 is in the shape of a truncated cone with a larger top and a smaller bottom, the sewage inlet 5 is located on the top surface of the truncated cone, and the sewage outlet 31 is located on the bottom surface of the truncated cone. The conical shell 2 in the shape of a truncated cone and the sewage inlet 5 and the sewage outlet 31 located at the upper and lower ends respectively allow long hair in the sewage to pass through the shearing surface of the blade as much as possible, thereby increasing the proportion and number of long hair being sheared into short hair segments.

[0046] Example

[0047] like Figures 1 to 3 As shown, this embodiment consists of two major units, one is a green drive unit; the other is a rotating hair-crushing unit. Both units are installed in a housing through fixed supports. In order to facilitate installation and use, the two units are integrated inside the device housing 10. The green drive unit includes a clean water inlet 12, a Laval tube 13, an impeller 14, a first horizontal transmission shaft 15, a hose 8, a clean water outlet 9, a left cross-shaped fixing frame 6, a straight-line fixing frame 7 and a right cross-shaped fixing frame 11. The rotating hair-crushing unit includes an upper moving blade 4, an upper static blade 3, a conical shell 2, an upper cross-shaped fixing frame 1, a vertical transmission shaft 30, a second rotating blade 29, a first rotating blade 28, a lower cross-shaped fixing frame 27, an upper sealing shell 26, a sleeve 25, a third bevel gear 24, a second bevel gear 23, a first bevel gear 21, a lower sealing shell 22, and a sewage outlet 31. The first horizontal transmission shaft 15 in the green drive unit is connected to the second horizontal transmission shaft 19 of the rotating hair-crushing unit through a coupling 17 to realize hair-crushing power transmission.

[0048] In this embodiment, a clean water inlet 12 is provided at the far right, a clean water outlet 9 is provided at the upper right of the top, a sewage inlet 5 is provided at the upper left of the top, and a sewage outlet 31 is provided at the lower left of the bottom.

[0049] The connection sequence of the green drive unit components is as follows: the left cross-shaped support frame 6, the linear support frame 7, and the right cross-shaped support frame 11 are connected to the device housing 10. The Laval tube 13 is respectively connected to the left cross-shaped support frame 6 and the right cross-shaped support frame 11 and is horizontally placed inside the device housing 10. The clean water inlet 12 of the Laval tube 13 is connected to the pre-set water outlet 41 of the building wall through the second metal braided hose 40. The outlet of the Laval tube 13 is connected to the water inlet of the faucet 33 through the hose 8. The impeller 14 is installed on the first horizontal transmission shaft 15. Both the impeller 14 and the first horizontal transmission shaft 15 are horizontally installed in the middle of the Laval tube 13, and the rotation axis of the impeller 14 coincides with the center line of the Laval tube 13. The first horizontal transmission shaft 15 is supported at the left end of the Laval tube 13 by the first deep groove ball bearing 16. The first horizontal transmission shaft 15 is connected to the second horizontal transmission shaft 19 of the rotating hair-crushing unit through the coupling 17.

[0050] The connection sequence of the rotating hair-crushing unit components - the second horizontal transmission shaft 19 is connected to the first bevel gear 21 through the fourth flat key 46. The first bevel gear 21 meshes with the third bevel gear 24 and the second bevel gear 23 respectively. The third bevel gear 24 is connected to the bushing 25 through the third flat key 45. The second bevel gear 23 is connected to the vertical transmission shaft 30 through the fifth flat key 47. The upper moving blade 4 is connected to the vertical transmission shaft 30 through the first flat key 42. The second rotating blade 29 is connected to the vertical transmission shaft 30 through the second flat key 43. The first rotating blade 28 is connected to the bushing 25 through the third flat key 44. The vertical transmission shaft 30 is supported on the fourth deep groove ball bearing 48 and the seventh deep groove ball bearing 51. The bushing 25 is supported on the fifth deep groove ball bearing 49 and the sixth deep groove ball bearing 50.

[0051] The vertical transmission shaft 30 is installed inside the bushing 25. To ensure the minimum transmission resistance, the outer diameter of the vertical transmission shaft 30 is smaller than the inner diameter of the bushing 25.

[0052] The upper static blade 3 is fixedly connected to the upper cross-shaped fixing frame. During the rotation of the upper moving blade 4, the upper static blade 3 remains stationary to complete the primary hair-crushing function.

[0053] The passive automatic hair-crushing device of this embodiment is installed directly below the washbasin. The clean water inlet 12 of this embodiment and the pre-set water outlet 41 in the wall are connected through the common second metal braided hose 40. The clean water outlet 9 and the faucet 33 are connected through the first metal braided hose 39, enabling the high-pressure water supply of the building to enter the faucet 33 to meet the daily water use needs.

[0054] Figure 2In this case, after the faucet 33 is turned on, the purified water enters the purified water inlet 12 of this embodiment through the second metal braided hose 40, and then enters the Laval tube 13. Due to the unique structure of the cross-section scaling of the Laval tube, the flow rate of the purified water at the purified water inlet 12 is effectively increased. The high-speed water turbine impacts the impeller 14 to rotate rapidly, and the rotational power is transmitted to the first bevel gear 21 through the first horizontal transmission shaft 15, the coupling 17, and the second horizontal transmission shaft 19.

[0055] The first bevel gear 21 meshes with the third bevel gear 24 and the second bevel gear 23 at the same time. Since the third bevel gear 24 and the second bevel gear 23 are respectively arranged on both sides of the first bevel gear 21, when the first bevel gear 21 rotates, the rotation direction of the second bevel gear 23 is just opposite to that of the third bevel gear 24. In addition, the number of teeth of the second bevel gear 23 and the third bevel gear 24 is the same, so that the rotational speeds of the second bevel gear 23 and the third bevel gear 24 are equal in magnitude.

[0056] When the second bevel gear 23 rotates, since the second bevel gear 23 and the vertical transmission shaft 30 are connected by the fifth flat key 47, the vertical transmission shaft 30 rotates. Under the action of the second flat key 43 and the first flat key 42, the vertical transmission shaft 30, the upper moving blade 4, and the second rotating blade 29 rotate at the same speed. At the same time, the third bevel gear 24 drives the sleeve 25 to rotate synchronously through the third flat key 45. Since the sleeve 25 and the first rotating blade 28 are connected by the third flat key 44, the third bevel gear 24 and the first rotating blade 28 rotate synchronously, and the rotation direction is just opposite to that of the second rotating blade 29. Under the combined action of the first rotating blade 28 and the second rotating blade 29 with opposite rotation directions, the hair cutting rate of the passive automatic hair cutting device is effectively improved.

[0057] Once the faucet 33 is in the open state, the impeller 14 is in the rotating state, thus driving the upper moving blade 4, the second rotating blade 29, and the first rotating blade 28 to rotate at high speed. The sewage and the dropped long hair in the washbasin 34 enter the sewage inlet 5 along with the water flow, and then enter the upper moving blade 4 and the upper static blade 3 to achieve primary hair cutting. Then, they enter the first rotating blade 28 and the second rotating blade 29 along with the water flow to achieve secondary hair cutting. The cut hair and sewage enter the sewage drain pipe 36 through the sewage outlet 31 until they are discharged into the main sewage pipe of the building.

[0058] The hair cutting device of the present invention utilizes the purified water pressure in the building pipeline as power, uses the Laval tube to increase the flow rate of the water flow, realizes the high-speed rotation of the hair cutting blades, and does not require additional external power, achieving the energy-saving requirement while realizing the hair cutting function.

[0059] In summary, by adding a Laval tube to the water inlet and purification pipeline, the present invention utilizes the contraction-dilation structure of the Laval tube to accelerate the water flow velocity. The high-speed water flow drives the impeller inside the Laval tube to rotate rapidly, providing power for the rotating hair-breaking unit without the need to introduce external electric energy or kinetic energy twice, overcoming the dependence on external energy sources and achieving passive automatic hair breaking. Therefore, the present invention can effectively cut the hair in the sink drain pipe and prevent pipeline blockage caused by hair entering the drain pipeline.

[0060] It should be emphasized that the above are only preferred embodiments of the present invention, and there is no limitation to the present invention in any form. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A passive automatic hair-crushing method for the water pipe of a wash basin, characterized in that: The following steps are involved: Step 1: A Laval tube is arranged in series in the water supply pipeline, so that the convergent section of the Laval tube is connected to the water inlet of the water supply pipeline, and the diffuser section of the Laval tube is connected to the water outlet of the water supply pipeline; Step 2, an impeller is arranged in the diffusion section of the Laval tube, so that the driving force direction of the impeller is toward the fluid flow direction in the Laval tube; Step 3, a rotary shearing hair-crushing device is arranged in the sewer pipe, wherein the rotary shearing surface of the hair-crushing device blocks the direction of the water flow channel in the sewer pipe; Step 4: transmitting the torque of the impeller in step 2 to the hair chopping device in step 3 to provide shear torque for the rotational shearing of the hair chopping device.

2. A passive automatic hair-crushing method for a water pipe of a wash basin according to claim 1, characterized in that: In step 3, the rotary shearing method of the hair-crushing device includes: rotary knife cutting, rotary cutting, rotary die cutting, spiral shearing, centrifugal shearing, and grinding shearing; In step 4, the torque transmission method includes: gear transmission, belt transmission, chain transmission, shaft transmission, coupling transmission, and magnetic coupling transmission.

3. A passive automatic hair-crushing method for a water pipe of a wash basin according to claim 2, characterized in that: The torque of the impeller is output to the outside of the Laval tube through the output shaft, the output shaft is connected to one end of the input shaft through a coupling, the other end of the input shaft extends into the sewer channel of the sewer pipe, and the input shaft drives the blade located in the sewer channel to perform rotary cutting to cut off the direction of water flow.

4. A passive automatic hair-crushing device for the water pipe of a wash basin, characterized in that: The passive automatic hair-chopping device adopts the passive automatic hair-chopping method according to any one of claims 1 to 3, and comprises: a Laval tube (13), a conical shell (2), and an impeller (14) is arranged in the diffusion section of the Laval tube (13); A first bevel gear (21) is provided in the conical housing (2), the first bevel gear (21) is meshed with a second bevel gear (23), and the second bevel gear (23) drives the upper movable blade (4) to perform rotary cutting; The impeller (14) is connected to the first bevel gear (21) via shaft transmission or coupling transmission torque transmission; The conical shell (2) is provided with a sewage inlet (5) and a sewage outlet (31); sewage flows into the conical shell (2) from the sewage inlet (5) and then flows out from the sewage outlet (31); the rotary cut surface of the upper movable blade (4) is cross-sectioned in the sewage flow channel of the conical shell (2).

5. A passive automatic hair-crushing device for the water pipe of a wash basin according to claim 4, characterized in that: The rotation axis of the first bevel gear (21) is perpendicular to the sewage flow direction in the conical housing (2), and the rotation axis of the second bevel gear (23) is parallel to the sewage flow direction in the conical housing (2).

6. A passive automatic hair-crushing device for the water pipe of a wash basin according to claim 5, characterized in that: The first bevel gear (21) is meshed with a third bevel gear (24), and the third bevel gear (24) drives the first rotating blade (28) to perform rotary cutting. The rotary cutting surfaces of the upper movable blade (4) and the first rotating blade (28) are parallel and have opposite rotation directions.

7. A passive automatic hair-crushing device for the water pipe of a wash basin according to claim 6, characterized in that: The third bevel gear (24) and the second bevel gear (23) have rotating surfaces that are parallel and have opposite rotation directions; the second bevel gear (23) drives the upper movable blade (4) to perform rotary cutting via a vertical transmission shaft (30), and the third bevel gear (24) drives the first rotating blade (28) to perform rotary cutting via a shaft sleeve (25); The shaft sleeve (25) is coaxially sleeved on the outer cylindrical surface of the vertical transmission shaft (30), and the shaft sleeve (25) is rotatably connected to the vertical transmission shaft (30).

8. A passive automatic hair-crushing device for the water pipe of a wash basin according to claim 7, characterized in that: An upper stationary blade (3) is also fixedly disposed in the conical housing (2), and the blade of the upper stationary blade (3) cooperates with the blade of the upper movable blade (4) to perform relative rotational shearing motion; The vertical transmission shaft (30) is also sleeved with a second rotating blade (29), and the second rotating blade (29) and the vertical transmission shaft (30) rotate synchronously coaxially. The shaft section of the vertical transmission shaft (30) sleeved with the second rotating blade (29) extends out of the end of the shaft sleeve (25), and the blade of the second rotating blade (29) cooperates with the blade of the first rotating blade (28) to perform relative rotating shearing motion.

9. A passive automatic hair-crushing device for the water pipe of a wash basin according to claim 6, characterized in that: A sealed transmission cavity shell that is buckled up and down is provided in the conical shell (2); the transmission cavity shell is fixed to the inner cavity of the conical shell (2) by means of ribs or connecting rods; the transmission cavity shell comprises an upper sealing shell (26) and a lower sealing shell (22); the first bevel gear (21), the second bevel gear (23), and the third bevel gear (24) are meshed in the transmission cavity shell; the rotating shafts of the first bevel gear (21), the second bevel gear (23), and the third bevel gear (24) respectively extend out of the transmission cavity shell; and the sewage in the conical shell (2) flows through the periphery of the transmission cavity shell.

10. A passive automatic hair-crushing device for a water pipe of a wash basin according to claim 4, characterized in that: The conical shell (2) is in the shape of a truncated cone that is larger at the top and smaller at the bottom. The sewage inlet (5) is located on the top surface of the truncated cone, and the sewage outlet (31) is located on the bottom surface of the truncated cone.

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