Flushing waterway switching device

Abstract

The utility model discloses a flushing waterway switching device which comprises a switching body, a water inlet pipeline, a brush ring pipeline and an injection pipeline. The switching body is provided with an inlet, a first switching port and a second switching port which are respectively communicated with the water inlet pipeline, the brush ring pipeline and the injection pipeline; the switching body is further provided with a backpressure water stop assembly and a switching assembly. The backpressure water stop assembly controls the inlet to movably communicate with the first switching opening and the second switching opening. The switching assembly controls the backpressure water stopping assembly to sequentially conduct water path switching that the inlet communicates with the first switching opening, the inlet communicates with the second switching opening and the inlet communicates with the first switching opening. The flushing waterway switching device can control the closestool to output brushing water in the early stage and the later stage of flushing in the flushing process of the closestool, so that water seal can be quickly formed at the bottom of a urinal of the closestool, and blowing of pipeline odor is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of closestool, especially a flush water route switching device. BACKGROUND

[0002] The existing closestool controls the closestool to output circle flushing water and then jet water when flushing through the flush water route switching device, wherein the circle flushing water is used for flushing the inner wall of the closestool bowl, and the jet water is used for flushing the bottom of the closestool bowl to form siphon. The existing flush water route switching device (such as the switching device disclosed in Chinese patent CN219491192U) always outputs jet water in the middle and later stages of closestool flushing, and the siphon formed by the jet water can drain the water seal at the bottom of the closestool bowl, and the water seal is currently restored by water replenishment through the water inlet valve, so the water inlet valve of the closestool has a fast water inlet speed, and thus the water seal cannot be quickly formed at the bottom of the closestool bowl, which can easily cause pipeline odor to drift out.

[0003] In view of the above problems, it is necessary to study a flush water route switching device which can quickly form a water seal at the bottom of the closestool bowl to prevent pipeline odor from drifting out. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a flush water route switching device which is helpful for saving water resources.

[0005] In order to achieve the above purpose, the solution of the utility model is as follows:

[0006] A flush water route switching device comprises a switching body, a water inlet pipeline, a circle flushing pipeline and a jet pipeline, the switching body has an inlet, a first switching port and a second switching port which are respectively communicated with the water inlet pipeline, the circle flushing pipeline and the jet pipeline, the switching body further has a back pressure water stop assembly and a switching assembly, the back pressure water stop assembly controls the inlet to be in active communication with the first switching port and the second switching port, the back pressure water stop assembly is provided with a first pressure relief hole and a second pressure relief hole, whether the first pressure relief hole is blocked or not controls whether the first switching port is in communication with the inlet or not, and whether the second pressure relief hole is blocked or not controls whether the second switching port is in communication with the inlet or not, the switching assembly comprises a first switching connecting rod, a second switching connecting rod, a first floating bucket and a second floating bucket, the first switching connecting rod is connected with the first floating bucket, the second switching connecting rod is connected with the second floating bucket, the second floating bucket is lower than the first floating bucket, the first switching connecting rod is in active blocking of the first pressure relief hole and the second pressure relief hole, and the second switching connecting rod is in active pressing of the first switching connecting rod and is used for driving the first switching connecting rod to block the second pressure relief hole.

[0007] The first switching link includes a first switching rod and a first connecting rod. The middle part of the first switching rod is rotatably connected to the switching body. The two ends of the first switching rod respectively form a first blocking part and a second blocking part for movably blocking the first pressure relief hole and the second pressure relief hole. The first end of the first connecting rod is connected to the second blocking part of the first switching rod, and the second end of the first connecting rod is connected to the first float bucket; the second switching link includes a second switching rod and a second connecting rod. The middle part of the second switching rod is rotatably connected to the switching body. The first end of the second switching rod movably presses the second blocking part of the first switching rod, the second end of the second switching rod is connected to the first end of the second switching rod, and the second end of the second connecting rod is connected to the second float bucket.

[0008] The switching body includes a switching body, the back pressure water stop assembly and the switching assembly; a switching cavity is formed inside the switching body, and the switching body is provided with the inlet, the first switching port and the second switching port communicating with the switching cavity; one side of the switching body is also provided with a mounting port communicating with the switching cavity; the back pressure water stop assembly includes a sealing cover, a first water stop pad, a second water stop pad, a first pressure cover and a second pressure cover; the sealing cover is installed at the mounting port and closes the mounting port, and the sealing cover is provided with the first pressure relief hole and the second pressure relief hole; the first water stop pad is installed at The first pressure cover is mounted on the first water-stop pad and the first pressure cover and the sealing cover form a first back pressure chamber connected to the first pressure relief hole. The first pressure cover is provided with a first drainage hole, and the first drainage hole is connected to the inlet. The second water-stop pad is installed in the switching chamber and movably blocks the second switching port. The second pressure cover is mounted on the second water-stop pad and the second water-stop pad, the second pressure cover and the sealing cover form a second back pressure chamber connected to the second pressure relief hole. The second pressure cover is provided with a second drainage hole, and the second drainage hole is connected to the inlet.

[0009] The first blocking portion and the second blocking portion of the first switching lever are both equipped with plugs.

[0010] The first gland is provided with a first slider in sliding connection with the sealing cover, and the second gland is provided with a second slider in sliding connection with the sealing cover.

[0011] The second end of the first connecting rod is connected to the first floating bucket through the first connecting rod. The second end of the first connecting rod forms a first movable hole. The first movable hole is sleeved with the first connecting rod. The first connecting rod is provided with a first pressure head for movably pressing the first connecting rod. The first connecting rod is screwed to the first floating bucket.

[0012] The second end of the second connecting rod is connected to the second floating bucket through the second connecting rod. The second end of the second connecting rod forms a second movable hole, the second movable hole is sleeved with the second connecting rod, the second connecting rod is provided with a second pressure head for movably pressing the second connecting rod, and the second connecting rod is screwed to the second floating bucket.

[0013] The first float bucket and the second float bucket are movably sleeved with a water inlet pipeline.

[0014] The water inlet pipeline is connected to a water pump.

[0015] The injection pipeline has a water supply interface.

[0016] The injection pipeline is provided with a check valve.

[0017] After adopting the above scheme, the working principle of the utility model is:

[0018] When the toilet needs to be flushed, the toilet water pump draws water from the water tank to the water inlet pipe of the flushing water circuit switching device;

[0019] In the early stage of flushing, the water in the water tank makes the first float and the second float both at the high position of the first float and the high position of the second float. At this time, the first float controls the first switching link to block the second pressure relief hole and the first switching link does not block the first pressure relief hole. At this time, the back pressure water stop assembly controls the first switching port of the switching body to be connected with the inlet and the second switching port of the switching body to be disconnected from the inlet, thereby connecting the brush ring pipeline with the water inlet pipeline, and then the water flow drawn by the water pump is output through the brush ring pipeline, so that the toilet outputs brush ring water to flush the inner wall of the toilet bowl; at the same time, the second float controls the second switching link not to press the first switching link;

[0020] In the middle of flushing, the water in the water tank decreases, causing the first float to be in the lower position of the first float and the second float to be still in the higher position of the second float. The first float controls the first switching link to block the first pressure relief hole, while the first switching link does not block the second pressure relief hole. At this time, the back pressure water stop assembly controls the second switching port of the switching body to be connected with the inlet, while the first switching port of the switching body is disconnected from the inlet, thereby connecting the jetting pipeline with the water inlet pipeline, and thus allowing the water flow pumped by the water pump to be output through the jetting pipeline, so that the toilet outputs the jet water and forms a siphon in the toilet. At the same time, the second float still controls the second switching link not to press the first switching link.

[0021] In the later stage of flushing, the water in the water tank continues to decrease, causing the first float to be at the lower position of the first float and the second float to be at the lower position of the second float. At this time, the second float controls the second switching link to press the first switching link and drive the first switching link to move, so that the first switching link blocks the second pressure relief hole and the first switching link does not block the first pressure relief hole. At this time, the back pressure water stop assembly controls the first switching port of the switching body to be connected with the inlet and the second switching port of the switching body is not connected with the inlet, thereby connecting the brush ring pipeline with the water inlet pipeline, and then causing the water flow drawn by the water pump to be output through the injection pipeline, so that the toilet outputs brush ring water to replenish the toilet bowl.

[0022] From the above, it can be seen that the flushing water path switching device of the present invention can control the toilet to output brush ring water in the early and late stages of the flush and only output spray water in the middle stage of the flush. In this way, the present invention can use the water in the toilet water tank to quickly form a water seal at the bottom of the toilet bowl in the later stage of the flush, thereby preventing the odor in the pipe from escaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 .

[0024] Figure 2 This is a schematic diagram of the structure of the utility model Figure 1 .

[0025] Figure 3 It is a cross-sectional view of the present invention.

[0026] Description of labels:

[0027] Switch body A, first back pressure chamber A01, second back pressure chamber A02,

[0028] Switch body 1, switch cavity 11, inlet 12, first switch port 13, second switch port 14, installation port 15,

[0029] Back pressure water stop assembly 2,

[0030] Cover 21, first pressure relief hole 211, second pressure relief hole 212,

[0031] First water stop pad 22, first pressure ring 221,

[0032] Second water stop pad 23, second pressure ring 231,

[0033] First gland 24, first drainage hole 241, first slider 242,

[0034] The second gland 25, the second drainage hole 251, the second slider 252,

[0035] Switch component 3,

[0036] First switching link 31, first switching rod 311, first blocking portion 3111, second blocking portion 3112, first connecting rod 312, first movable hole 3121, plug 313,

[0037] The second switching link 32, the second switching rod 321, the second connecting rod 322, the second movable hole 3221,

[0038] The first floating bucket 33,

[0039] The second floating bucket 34,

[0040] First connecting rod 35, first pressing head 351,

[0041] The second connecting rod 36, the second pressure head 361,

[0042] Water inlet pipe B,

[0043] Brush ring pipeline C,

[0044] Injection pipeline D, water supply interface D1, check valve D2,

[0045] Water pump E. DETAILED DESCRIPTION

[0046] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0047] like Figures 1 to 3 As shown, the utility model discloses a flushing waterway switching device, which includes a switching body A, a water inlet pipe B, a brush ring pipe C and a jet pipe D; the switching body A has an inlet 12, a first switching port 13 and a second switching port 14 respectively connected to the water inlet pipe B, the brush ring pipe C and the jet pipe D, and the water inlet pipe B is connected to the water pump E; the switching body A also has a back pressure water stop component 2 and a switching component 3; the back pressure water stop component 2 controls the inlet 12 to be connected to the first switching port 13 and the second switching port 14, and the back pressure water stop component 2 is provided with a first pressure relief hole 21 and a second pressure relief hole 22, which is controlled accordingly by whether the first pressure relief hole 21 is blocked or not. Whether the first switching port 13 is connected to the inlet 12 and whether the second pressure relief hole 22 is blocked is controlled accordingly to control whether the second switching port 14 is connected to the inlet 12; the switching component 3 includes a first switching link 31, a second switching link 32, a first float 33 and a second float 34; the first switching link 31 is connected to the first float 33, the second switching link 32 is connected to the second float 34, the second float 34 is lower than the first float 33, the first switching link 31 movably blocks the first pressure relief port 21 and the second pressure relief port 22, the second switching link 32 movably presses the first switching link 31 and is used to drive the first switching link 31 to block the second pressure relief port 22. When the toilet is flushed, the flushing water path switching device of the present invention first opens the first pressure relief port 21 and blocks the second pressure relief port 22 under the buoyancy of the first float 33. After the water level in the toilet tank drops, the first switching link 31 moves to block the first pressure relief port 21 and open the second pressure relief port 22. When the water level in the water tank continues to drop below the working water level of the second float 34, the second float 34 drives the second switching link 32 to press the first switching link 31, thereby driving the first switching link 31 to block the second pressure relief port 22 and open the first pressure relief port 21.

[0048] Specifically, the first switching link 31 includes a first switching rod 311 and a first connecting rod 312. The middle part of the first switching rod 311 is rotatably connected to the switching body A. The two ends of the first switching rod 311 respectively form a first blocking portion 3111 and a second blocking portion 3112 that movably block the first pressure relief hole 21 and the second pressure relief hole 22. The first end of the first connecting rod 312 is connected to the second blocking portion 3112 of the first switching rod 311, and the second end of the first connecting rod 312 is connected to the first float 33. The second switching link 32 includes a second switching rod 321 and a second connecting rod 322. The middle part of the second switching rod 321 is rotatably connected to the switching body A. The first end of the second switching rod 321 movably presses the second blocking portion 3112 of the first switching rod 311. The second end of the second switching rod 321 is connected to the first end of the second switching rod 321, and the second end of the second connecting rod 322 is connected to the second float 34. The working principle of the present utility model is specifically as follows:

[0049] When the toilet needs to be flushed, the toilet water pump E pumps water from the water tank to the water inlet pipe B of the flushing water circuit switching device;

[0050] When the water in the water tank is high, the first float 33 and the second float 34 are both at the high position of the first float 33 and the high position of the second float 34. At this time, the first float 33 controls the second blocking portion 3112 of the first switching lever 311 to block the second pressure relief hole 22 through the first connecting rod 312, and the first blocking portion 3111 of the first switching lever 311 does not block the first pressure relief hole 21. At this time, the back pressure water stop assembly 2 controls the first switching port 13 of the switching body A to be connected with the inlet 12 and the second switching port 14 of the switching body A to be disconnected from the inlet 12, thereby connecting the brush ring pipeline C with the water inlet pipeline B, and thus allowing the water flow extracted by the water pump E to be output through the brush ring pipeline C, so that the toilet outputs brush ring water to flush the inner wall of the toilet bowl; at the same time, the second float 34 controls the first end of the second switching lever 321 through the second connecting rod 322 not to press the second blocking portion 3112 of the first switching lever 311;

[0051] In the middle of the flushing, the water in the water tank is reduced so that the first float bucket 33 is at the low position of the first float bucket 33 and the second float bucket 34 is still at the high position of the second float bucket 34, the first float bucket 33 controls the first blocking part 3111 of the first switching rod 311 to block the first pressure relief hole 21 through the first connecting rod 312 and the second blocking part 3112 of the first switching rod 311 does not block the second pressure relief hole 22, at this time, the back pressure water stop assembly 2 controls the second switching port 14 of the switching body A to communicate with the inlet 12 and the first switching port 13 of the switching body A does not communicate with the inlet 12, so that the jet pipeline D communicates with the water inlet pipeline B, and then the water flow extracted by the water pump E is output through the jet pipeline D, so that the closestool outputs the jet water and forms the siphon; at the same time, the second float bucket 34 still controls the first end part of the second switching rod 321 not to press the second blocking part 3112 of the first switching rod 311 through the second connecting rod 322;

[0052] In the later stage of the flushing, the water in the water tank continues to be reduced so that the first float bucket 33 is at the low position of the first float bucket 33 and the second float bucket 34 is at the low position of the second float bucket 34, at this time, the second float bucket 34 controls the first end part of the second switching rod 321 to press the second blocking part 3112 to drive the first switching rod 311 to rotate through the second connecting rod 322, so that the second blocking part 3112 of the first switching rod 311 blocks the second pressure relief hole 22 and the first blocking part 3111 of the first switching rod 311 does not block the first pressure relief hole 21, at this time, the back pressure water stop assembly 2 controls the first switching port 13 of the switching body A to communicate with the inlet 12 and the second switching port 14 of the switching body A does not communicate with the inlet 12, so that the brush circle pipeline C communicates with the water inlet pipeline B, and then the water flow extracted by the water pump E is output through the jet pipeline D, so that the closestool outputs the brush circle water and replenishes the closestool bowl.

[0053] From the above, the closestool flushing water path switching device can control the closestool to output the brush circle water in the early stage and the later stage of the closestool flushing and output the jet water only in the middle stage of the closestool flushing, so that the closestool water tank can form the water seal at the bottom of the closestool bowl in the later stage of the closestool flushing, and the odor in the pipeline is avoided from escaping.

[0054] In an embodiment of the present utility model, the switching body A includes a switching body 1, the back pressure water stop assembly 2 and the switching assembly 3; a switching cavity 11 is formed inside the switching body 1, and the switching body 1 is provided with the inlet 12, the first switching port 13 and the second switching port 14 communicated with the switching cavity 11; one side of the switching body 1 is also provided with a mounting port 15 communicated with the switching cavity 11; the back pressure water stop assembly 2 includes a sealing cover 21, a first water stop pad 22, a second water stop pad 23, a first pressure cover 24 and a second pressure cover 25; the sealing cover 21 is installed on the mounting port 15 and closes the mounting port 15, and the sealing cover 21 is provided with the first pressure relief hole 21 and the second pressure relief hole 22; the first water stop pad 22 is installed in the switching cavity 11 and movably blocks the first switching port 13, and the edge of the first water stop pad 22 It can be connected to the cover 21 through the first pressure ring 221, the first pressure cover 24 is matched with the first water stop pad 22, and the first water stop pad 22, the first pressure cover 24 and the cover 21 form a first back pressure chamber A01 communicated with the first pressure relief hole 21, the first pressure cover 24 is provided with a first drainage hole 241, and the first drainage hole 241 is communicated with the inlet 12; the second water stop pad 23 is installed in the switching chamber 11 and movably blocks the second switching port 14, the edge of the second water stop pad 23 can be connected to the cover 21 through the second pressure ring 231, the second pressure cover 25 is matched with the second water stop pad 23, and the second water stop pad 23, the second pressure cover 25 and the cover 21 form a second back pressure chamber A02 communicated with the second pressure relief hole 22, the second pressure cover 25 is provided with a second drainage hole 251, and the second drainage hole 251 is communicated with the inlet 12. The middle portion of the first switching lever 311 can be rotatably connected to the cover 21 , and the middle portion of the second switching lever 321 can also be rotatably connected to the cover 21 .

[0055] The working principle of the back pressure water stop assembly 2 of the present invention is: when the first pressure relief hole 21 is opened and the second pressure relief hole 22 is blocked, the first back pressure chamber A01 is depressurized and the second back pressure chamber A02 is filled with water and pressurized, so that the second water stop pad 23 moves to close the second switching port 14 and the first water stop pad 22 does not close the first switching port 13, so that the first switching port 13 is connected with the inlet 12 and the brush ring pipeline C is connected with the water inlet pipeline B; and when the first pressure relief hole 21 is blocked and the second pressure relief hole 22 is opened, the first back pressure chamber A01 is filled with water and pressurized and the second back pressure chamber A02 is depressurized, so that the first water stop pad 22 moves to close the first switching port 13 and the second water stop pad 23 does not close the second switching port 14, so that the second switching port 14 is connected with the inlet 12 and the injection pipeline D is connected with the water inlet pipeline B.

[0056] In an embodiment of the present invention, the first gland 24 may be provided with a first slider 242 that slides in contact with the cover 21, allowing the first water-stopping pad 22 to move accurately, thereby enabling the first water-stopping pad 22 to accurately close the first switching opening 13. Similarly, the second gland 25 may be provided with a second slider 252 that slides in contact with the cover 21, allowing the second water-stopping pad 23 to move accurately, thereby enabling the second water-stopping pad 23 to accurately close the second switching opening 14.

[0057] In the embodiment of the present invention, the first blocking portion 3111 and the second blocking portion 3112 of the first switching lever 311 are both equipped with plugs 313 , thereby ensuring a blocking effect on the first pressure relief hole 21 and the second pressure relief hole 22 .

[0058] In the embodiment of the present invention, the second end of the first linkage rod 312 is connected to the first float 33 via a first connecting rod 35. Specifically, a first movable hole 3121 is formed at the second end of the first linkage rod 312, which is inserted into the first connecting rod 35. The first connecting rod 35 is provided with a first pressure head 351 that flexibly presses the first linkage rod 312. The first connecting rod 35 is connected to the first float 33, and the upward and downward movement of the first float 33 drives the first switching link 31 to rotate. The first connecting rod 35 and the first float 33 are threadedly connected, allowing the initial position of the first float 33 to be adjusted and the timing of the first flushing water output to be controlled. The first float 33 flexibly inserts the water inlet pipe B, allowing the water inlet pipe B to guide the movement of the first float 33 and reducing the size of the flushing water circuit switching device.

[0059] In an embodiment of the present invention, the second end of the second linkage rod 322 is connected to the second float 34 via a second connecting rod 36. Specifically, a second movable hole 3221 is formed at the second end of the second linkage rod 322, which is inserted into the second connecting rod 36. The second connecting rod 36 is provided with a second pressure head 361 that flexibly presses the second linkage rod 322. The second connecting rod 36 is connected to the second float 34, and the upward and downward movement of the second float 34 drives the second switching link 32 to rotate. The second connecting rod 36 and the second float 34 are threadedly connected, allowing the initial position of the second float 34 to be adjusted and the timing of the water spray output to be controlled. The second float 34 flexibly inserts the water inlet pipe B, allowing the water inlet pipe B to guide the movement of the second float 34 and reducing the size of the flushing waterway switching device.

[0060] In an embodiment of the present invention, the injection pipe D may have a water supply interface D1 for connecting to the toilet water inlet valve; after the toilet is flushed, the water inlet valve introduces water from the external water source into the water tank, and at the same time, the water inlet valve also introduces water from the external water source into the injection pipe D, so that water flows out of the injection pipe D and a better water seal is formed at the bottom of the toilet bowl.

[0061] In the embodiment of the utility model, the injection pipeline D can be equipped with check valve D2, check valve D2 can prevent the water flow in the closestool bowl from flowing back to the flush water pipeline switching device.

[0062] The above embodiment and drawing are not limited to the product shape and style of the utility model, and any ordinary technical personnel in the technical field can make appropriate changes or modifications, which should be considered as not departing from the patent category of the utility model.

Claims

1. A flushing waterway switching device, characterized in that: Including switching body, water inlet pipeline, brush circle pipeline and injection pipeline; The switching body has an inlet, a first switching port and a second switching port respectively connected to the water inlet pipe, the brush ring pipe and the spray pipe; the switching body also has a back pressure water stop assembly and a switching assembly; the back pressure water stop assembly controls the inlet to be connected to the first switching port and the second switching port, and the back pressure water stop assembly is provided with a first pressure relief hole and a second pressure relief hole. Whether the first pressure relief hole is blocked or not controls whether the first switching port is connected to the inlet, and whether the second pressure relief hole is blocked or not controls whether the second switching port is connected to the inlet; The switching assembly includes a first switching link, a second switching link, a first float bucket and a second float bucket; the first switching link is connected to the first float bucket, the second switching link is connected to the second float bucket, the second float bucket is lower than the first float bucket, the first switching link movably blocks the first pressure relief port and the second pressure relief port, and the second switching link movably presses the first switching link and is used to drive the first switching link to block the second pressure relief port.

2. The flushing waterway switching device according to claim 1, characterized in that: The first switching link includes a first switching rod and a first connecting rod, the middle portion of the first switching rod is rotatably connected to the switching body, and the two ends of the first switching rod are respectively formed with a first blocking portion and a second blocking portion for movably blocking the first pressure relief hole and the second pressure relief hole, the first end of the first connecting rod is connected to the second blocking portion of the first switching rod, and the second end of the first connecting rod is connected to the first floating bucket; The second switching link includes a second switching rod and a second connecting rod. The middle part of the second switching rod is rotatably connected to the switching body. The first end of the second switching rod movably presses the second blocking part of the first switching rod. The second end of the second switching rod is connected to the first end of the second switching rod. The second end of the second connecting rod is connected to the second float bucket.

3. The flushing waterway switching device according to claim 2, wherein: The switching body includes a switching main body, the back pressure water stop assembly and the switching assembly; A switching cavity is formed inside the switching body, and the switching body is provided with the inlet, the first switching port and the second switching port communicating with the switching cavity; a mounting port communicating with the switching cavity is also provided on one side of the switching body; The back-pressure water-stop assembly includes a sealing cover, a first water-stop pad, a second water-stop pad, a first pressure cover and a second pressure cover; the sealing cover is installed on the installation port and closes the installation port, and the sealing cover is provided with the first pressure relief hole and the second pressure relief hole; the first water-stop pad is installed in the switching chamber and movably blocks the first switching port, the first pressure cover is matched on the first water-stop pad and the first water-stop pad, the first pressure cover and the sealing cover form a first back-pressure chamber communicated with the first pressure relief hole, the first pressure cover is provided with a first drainage hole, and the first drainage hole is communicated with the inlet; the second water-stop pad is installed in the switching chamber and movably blocks the second switching port, the second pressure cover is matched on the second water-stop pad and the second water-stop pad, the second pressure cover and the sealing cover form a second back-pressure chamber communicated with the second pressure relief hole, the second pressure cover is provided with a second drainage hole, and the second drainage hole is communicated with the inlet.

4. The flushing waterway switching device according to claim 3, wherein: The first blocking portion and the second blocking portion of the first switching lever are both equipped with plugs.

5. The flushing water channel switching device according to claim 3, characterized in that: The first gland is provided with a first slider in sliding connection with the sealing cover, and the second gland is provided with a second slider in sliding connection with the sealing cover.

6. The flushing waterway switching device according to claim 2, wherein: The second end of the first connecting rod is connected to the first floating bucket through the first connecting rod. The second end of the first connecting rod forms a first movable hole. The first movable hole is sleeved with the first connecting rod. The first connecting rod is provided with a first pressure head for movably pressing the first connecting rod. The first connecting rod is screwed to the first floating bucket.

7. The flushing waterway switching device according to claim 2, wherein: The second end of the second connecting rod is connected to the second floating bucket through the second connecting rod. The second end of the second connecting rod forms a second movable hole, the second movable hole is sleeved with the second connecting rod, the second connecting rod is provided with a second pressure head for movably pressing the second connecting rod, and the second connecting rod is screwed to the second floating bucket.

8. The flushing waterway switching device according to claim 1, wherein: The first float bucket and the second float bucket are movably sleeved with a water inlet pipeline.

9. The flushing water channel switching device according to claim 1, characterized in that: The water inlet pipeline is connected to a water pump.

10. The flushing water channel switching device according to claim 1, characterized in that: The injection pipeline has a water supply interface; the injection pipeline is provided with a check valve.

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