An adjustable height water inlet valve

Abstract

This utility model discloses an adjustable height water inlet valve, including an inlet pipe and a valve body assembly. The valve body assembly is fitted onto the inlet pipe. One of the valve body assembly and the inlet pipe is provided with a locking block, and the other is provided with multiple first locking grooves for engaging with the locking block. All the first locking grooves are arranged along the axial direction of the inlet pipe. One of the valve body assembly and the inlet pipe is provided with a positioning part, which can elastically move radially along the inlet pipe. During the axial movement of the valve body assembly relative to the inlet pipe, the positioning part can enter and exit any one of the first locking grooves, and when the positioning part is engaged in one of the first locking grooves, the locking block is aligned with the other first locking groove. The water inlet valve provided by this utility model can improve the accuracy of the height adjustment of the valve body assembly.

Description

Technical Field

[0001] This utility model relates to the field of water inlet valve technology, and in particular to a water inlet valve with adjustable height. Background Technology

[0002] The inlet valve is an automatic water inlet device for toilet tanks. When the water level in the tank is below a certain height, the valve body opens to allow tap water to flow into the tank. When the water level rises to a certain height, the valve body automatically closes. Some existing inlet valves, in order to adjust the height of the valve body assembly according to the tank height, have locking blocks on the valve body assembly and multiple locking slots on the inlet pipe that mate with the locking blocks. Thus, by rotating the valve body assembly to move the locking blocks in and out of the locking slots, and by raising or lowering the valve body assembly, the height of the valve body assembly is adjusted. However, with this type of inlet valve, it is difficult to accurately control the raising or lowering of the valve body assembly. It is easy to raise or lower the valve body assembly too high or too low, causing the locking blocks to misalign with the locking slots that meet the height requirements. This necessitates repeated attempts to rotate and raise or lower the valve body assembly. Therefore, the accuracy of the height adjustment of existing inlet valves needs improvement. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an adjustable-height water inlet valve, which can improve the accuracy of height adjustment of the valve body assembly.

[0004] An adjustable-height water inlet valve according to an embodiment of the present invention includes an inlet pipe and a valve body assembly. One end of the valve body assembly is inserted into the inlet pipe. One of the valve body assembly and the inlet pipe is provided with a locking block, and the other is provided with a plurality of first locking slots for engaging with the locking block. All the first locking slots are arranged along the axial direction of the valve body assembly. The valve body assembly is circumferentially rotatable and axially movable relative to the inlet pipe, so that the locking block can enter and exit any one of the first locking slots. A positioning part is provided in one of the valve body assembly and the inlet pipe. The positioning part is radially elastically movable relative to the inlet pipe. During the axial movement of the water inlet pipe, the positioning part can enter and exit any one of the first locking slots, and when the positioning part is locked in one of the first locking slots, the locking block is aligned with the other first locking slot; or, one of the valve body assembly and the water inlet pipe is provided with a positioning part, and the other is provided with a plurality of second locking slots arranged along the axial direction of the water inlet pipe. The positioning part can move elastically along the radial direction of the valve body assembly. During the axial movement of the valve body assembly relative to the water inlet pipe, the positioning part can enter and exit any one of the second locking slots, and when the positioning part is locked in one of the second locking slots, the locking block is aligned with one of the first locking slots.

[0005] An adjustable-height water inlet valve according to an embodiment of the present invention has at least the following beneficial effects: The water inlet valve provided by the present invention can achieve height adjustment of the valve body assembly by rotating the valve body assembly, raising and lowering the valve body assembly, and then rotating the valve body assembly again. In the process of raising and lowering the valve body assembly, the positioning part that can move elastically cooperates with any first locking groove or any second locking groove for positioning, so as to realize the height adjustment of the valve body assembly step by step along the axial direction of the water inlet pipe. Each level of height adjustment can ensure that the locking block is aligned with the corresponding first locking groove. Thus, the possibility of misalignment between the locking block and the first locking groove can be effectively avoided, improving the accuracy of the height adjustment of the valve body assembly. This allows subsequent height adjustment to be completed simply by rotating the valve body assembly to re-insert the locking block into the corresponding first locking groove, reducing the number of times the valve body assembly is repeatedly rotated and raised and lowered.

[0006] According to some embodiments of the present invention, a first unlocking device is provided between the valve body assembly and the water inlet pipe. When the locking block is locked in one of the first locking slots, the first unlocking device can restrict the rotation of the valve body assembly or unlock the valve body assembly.

[0007] According to some embodiments of the present invention, the first unlocking device includes a lever, which is installed on the valve body assembly and can slide along the axial direction of the water inlet pipe. The positioning part is connected to the lever. The locking block is disposed on the valve body assembly, and the first locking groove is disposed on the water inlet pipe. The water inlet pipe is provided with multiple positioning steps along the axial direction. The first locking groove or the second locking groove is formed by two adjacent positioning steps. When the locking block is locked in one of the first locking grooves, the positioning part is located outside the first locking groove or the second locking groove so that the lever can drive the positioning part to slide between a first position and a second position. When the positioning part slides to the first position, the positioning part abuts against the positioning step to restrict the rotation of the valve body assembly. When the positioning part slides to the second position, the positioning part avoids the positioning step to allow the valve body assembly to rotate.

[0008] According to some embodiments of the present invention, a second unlocking device is provided between the lever and the valve body assembly. When the lever drives the positioning part to slide to the first position, the second unlocking device can restrict the movement of the lever or unlock the lever.

[0009] According to some embodiments of the present invention, the second unlocking device includes a paddle, which is mounted on the lever. The paddle is slidable relative to the lever along the circumference of the water inlet pipe. A locking position is provided between the paddle and the valve body assembly, and a locking part is provided on the other side. By sliding the paddle circumferentially relative to the lever, the locking part and the locking position can be locked together or disengaged from each other.

[0010] According to some embodiments of the present invention, a first guide limiting structure is provided between the lever and the paddle, and the first guide limiting structure can limit the sliding range of the paddle.

[0011] According to some embodiments of the present invention, a second guide limiting structure is provided between the lever and the valve body assembly, and the second guide limiting structure can limit the sliding range of the lever.

[0012] According to some embodiments of the present invention, the second guide limiting structure includes two gear holes and a limiting post. The two gear holes are spaced apart along the axial direction of the water inlet pipe on the lever and are connected. The limiting post is disposed on the valve body assembly and can be inserted into either of the gear holes. The lever is provided with two clearance holes spaced apart along the circumference of the water inlet pipe. The two gear holes are located between the two clearance holes so that the opposite side walls of the gear holes are elastic. The limiting post can move between the two gear holes.

[0013] According to some embodiments of the present invention, the valve body assembly includes a housing, a switching valve, and a floating device. One end of the housing is sleeved on the water inlet pipe. The switching valve is installed on the valve body assembly. The floating device is vertically and flexibly installed on the valve body assembly. The floating device is pulsatorically connected to the switching valve to control the opening and closing of the switching valve. The input pipe of the switching valve is vertically and flexibly inserted into the water inlet pipe, and the water inlet channel in the water inlet pipe is connected to the input pipe of the switching valve.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0016] Figure 1 This is a partial cross-sectional view of the adjustable height water inlet valve (when both the first unlocking device and the second unlocking device are locked) according to an embodiment of the present utility model.

[0017] Figure 2 for Figure 1 The figure shows a cross-sectional view of the adjustable height inlet valve on section AA.

[0018] Figure 3 for Figure 1 An exploded view of the valve body assembly of the adjustable height inlet valve is shown.

[0019] Figure 4 for Figure 1 A schematic diagram of the housing of an adjustable-height inlet valve is shown.

[0020] Figure 5 for Figure 1 A schematic diagram of an adjustable height water inlet valve (when both the first and second unlocking devices are locked);

[0021] Figure 6 for Figure 1 A schematic diagram of an adjustable height water inlet valve (when both the first and second unlocking devices are unlocked);

[0022] Figure 7 for Figure 1 The diagram shown is of an adjustable height inlet valve (when the valve body assembly is in use).

[0023] Figure label:

[0024] Water inlet pipe 100, water inlet channel 110, positioning step 120, first locking groove 121, valve body assembly 200, outer shell 210, locking block 211, locking position 212, limiting post 213, slot 214, switch valve 220, input pipe 221, floating device 230, lever 310, positioning part 311, gear hole 312, clearance hole 313, lever 320, locking part 321. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] Reference Figure 1 According to an embodiment of the present invention, an adjustable height water inlet valve includes a water inlet pipe 100 and a valve body assembly 200. One end of the valve body assembly 200 is inserted into the water inlet pipe 100. One of the valve body assembly 200 and the water inlet pipe 100 is provided with a locking block 211, and the other is provided with a plurality of first locking slots 121 for engaging with the locking block 211. All the first locking slots 121 are arranged along the axial direction of the water inlet pipe 100. The valve body assembly 200 can rotate circumferentially and move axially relative to the water inlet pipe 100 so that the locking block 211 can enter and exit any one of the first locking slots 121.

[0030] Reference Figure 1 In order to ensure the accuracy of height adjustment of valve body assembly 200, in some embodiments, one of valve body assembly 200 and water inlet pipe 100 is provided with positioning part 311. Positioning part 311 can move elastically along the radial direction of water inlet pipe 100. During the axial movement of valve body assembly 200 relative to water inlet pipe 100, positioning part 311 can enter and exit any one of the first slots 121. When positioning part 311 is locked in one of the first slots 121, the locking block 211 is aligned with the other first slot 121.

[0031] It should be noted that in other embodiments, other methods can also be used to ensure the accuracy of the height adjustment of the valve body assembly 200. For example, one of the valve body assembly 200 and the water inlet pipe 100 is provided with a positioning part 311, and the other is provided with a plurality of second slots arranged along the axial direction of the water inlet pipe 100. The positioning part 311 can move elastically along the radial direction of the valve body assembly 200. During the axial movement of the valve body assembly 200 relative to the water inlet pipe 100, the positioning part 311 can enter and exit any one of the second slots. When the positioning part 311 is locked in one of the second slots, the locking block 211 is aligned with one of the first slots 121.

[0032] Reference Figure 1 and Figure 7With the above configuration, the inlet valve provided by this utility model can achieve height adjustment of the valve body assembly 200 by rotating the valve body assembly 200, raising and lowering the valve body assembly 200, and then rotating the valve body assembly 200 again. During the raising and lowering of the valve body assembly 200, the positioning part 311, which can move elastically, cooperates with any first slot 121 or any second slot for positioning. This allows for step-by-step raising and lowering of the valve body assembly 200 along the axial direction of the inlet pipe 100. Each level of height adjustment ensures that the locking block 211 is aligned with the corresponding first slot 121. This effectively avoids the possibility of misalignment between the locking block 211 and the first slot 121, improving the accuracy of the height adjustment of the valve body assembly 200. Subsequent height adjustments can be completed simply by rotating the valve body assembly 200 to re-insert the locking block 211 into the corresponding first slot 121, reducing the number of times the valve body assembly 200 is repeatedly rotated and raised and lowered. In addition, the positioning part 311 also improves the feel of lifting and lowering the valve body assembly 200.

[0033] When the valve body assembly 200 is raised, the positioning part 311 will elastically deform along the radial direction of the water inlet pipe 100 to enter or exit any one of the first slots 121 or the second slot. During this process, the positioning part 311 collides with the side wall of the first slot 121 or the second slot, thereby generating a sound indicating that the valve body assembly 200 is raised and lowered step by step.

[0034] Reference Figure 1 , Figure 2 According to some embodiments of this utility model, a first unlocking device is provided between the valve body assembly 200 and the water inlet pipe 100. When the locking block 211 is engaged in one of the first locking slots 121, the first unlocking device can restrict the rotation of the valve body assembly 200 or unlock the valve body assembly 200. By providing the first unlocking device, the valve body assembly 200 can be locked when the height of the valve body assembly 200 does not need to be adjusted, preventing external factors from causing the valve body assembly 200 to rotate automatically and causing the locking block 211 to disengage from the first locking slot 121.

[0035] Reference Figures 1 to 3According to some embodiments of the present invention, the first unlocking device includes a lever 310, which is mounted on the valve body assembly 200 and can slide along the axial direction of the water inlet pipe 100. A positioning part 311 is connected to the lever 310. A locking block 211 is disposed on the valve body assembly 200, and a first locking groove 121 is disposed on the water inlet pipe 100. The water inlet pipe 100 is provided with a plurality of positioning steps 120 along the axial direction. The first locking groove 121 or the second locking groove is formed by two corresponding adjacent positioning steps 120. When the locking block 211 is engaged in one of the first locking slots 121, the positioning part 311 is located outside the first locking slot 121 or the second locking slot, so that the lever 310 can drive the positioning part 311 to slide between the first position and the second position. When the positioning part 311 slides to the first position, the positioning part 311 abuts against the positioning step 120 to restrict the rotation of the valve body assembly 200. When the positioning part 311 slides to the second position, the positioning part 311 avoids the positioning step 120 to allow the valve body assembly 200 to rotate. With the above configuration, the positioning part 311 can also be used to restrict the rotation of the valve body assembly 200 or unlock the valve body assembly 200 without the need for additional positioning part 311 and locking slots.

[0036] Reference Figures 5 to 7 When it is necessary to adjust the height of the valve body assembly 200, the lever 310 can be slid first to make the positioning part 311 slide from the first position to the second position, thereby unlocking the valve body assembly 200. Then, the valve body assembly 200 can be rotated to make the locking block 211 disengage from the first locking slot 121. The entire valve body assembly 200 can then be raised or lowered. Next, the valve body assembly 200 can be rotated to make the locking block 211 re-enter one of the first locking slots 121, thereby completing the height adjustment of the valve body assembly 200. At this time, the positioning part 311 returns to the second position. Finally, the lever 310 can be slid to slide the positioning part 311 to the first position, thereby relocking the valve body assembly 200.

[0037] Reference Figure 2 and Figure 4 In the specific implementation process, in order to make the valve body assembly 200 rotate more stably, the valve body assembly 200 is provided with two or more locking blocks 211 around the water inlet pipe 100. Correspondingly, the water inlet pipe 100 is provided with multiple sets of first locking slots 121.

[0038] Reference Figure 1 and Figure 2 According to some embodiments of this utility model, a second unlocking device is provided between the lever 310 and the valve body assembly 200. When the lever 310 drives the positioning part 311 to slide to the first position, the second unlocking device can restrict the movement of the lever 310 or unlock the lever 310. By setting the second unlocking device, the lever 310 can be prevented from sliding automatically under the influence of its own gravity and other factors, thereby preventing the positioning part 311 from accidentally moving from the first position to the second position.

[0039] Reference Figure 1 and Figure 2 According to some embodiments of this utility model, the second unlocking device includes a paddle 320, which is mounted on a lever 310. The paddle 320 can slide relative to the lever 310 along the circumference of the water inlet pipe 100. A locking position 212 is provided between the paddle 320 and the valve body assembly 200, and a locking part 321 is provided on the other side. By sliding the paddle 320 relative to the lever 310 in the circumference, the locking part 321 and the locking position 212 can be locked or disengaged from each other. Therefore, when the lever 310 moves the positioning part 311 to the first position, simply sliding the paddle 320 can lock or unlock the lever 310, making the operation convenient and simple. The sliding direction of the paddle 320 is along the circumference of the water inlet pipe 100, while the sliding direction of the lever 310 is along the axial direction of the water inlet pipe 100. The different sliding directions of the paddle 320 and the lever 310 provide better protection against accidents.

[0040] Reference Figure 1 , Figures 5 to 7 In specific implementation, the valve body assembly 200 is provided with a slot 214 along the axial direction of the water inlet pipe 100. The lever 310 is slidably inserted into the slot 214. Thus, the lever 310 can be guided to slide through the slot 214. At the same time, the side wall of the slot 214 restricts the rotation of the lever 310 relative to the valve body assembly 200, so that the lever 310 can rotate together with the valve body assembly 200. One side wall of the slot 214 can be configured as the aforementioned locking position 212.

[0041] Reference Figure 3 According to some embodiments of the present invention, a first guide limiting structure is provided between the lever 310 and the paddle 320. The first guide limiting structure can limit the sliding range of the paddle 320 and guide the paddle 320 to improve the operating feel.

[0042] Reference Figure 3 According to some embodiments of the present invention, a second guide limiting structure is provided between the lever 310 and the valve body assembly 200. The second guide limiting structure can limit the sliding range of the lever 310 and enable the valve body assembly 200 to drive the lever 310 to rise and fall together.

[0043] Reference Figure 3According to some embodiments of the present invention, the second guide limiting structure includes two gear holes 312 and a limiting post 213. The two gear holes 312 are spaced apart along the axial direction of the water inlet pipe 100 on the lever 310 and are connected. The limiting post 213 is disposed on the valve body assembly 200 and can be inserted into either gear hole 312. The lever 310 is spaced apart along the circumference of the water inlet pipe 100 by two clearance holes 313. The two gear holes 312 are located between the two clearance holes 313 so that the opposite side walls of the gear holes 312 are elastic. The limiting post 213 can move between the two gear holes 312. When the lever 310 drives the positioning part 311 to move upward to the first position, the limiting post 213 is inserted into the lower gear hole 312. When the lever 310 drives the positioning part 311 to move downward to the second position, the limiting post 213 is inserted into the upper gear hole 312. By setting the second guide limiting structure, when people move the lever 310, it can be ensured that the lever 310 can drive the positioning part 311 to move accurately to the first position or the second position, and the feel is improved.

[0044] The setting method of the first guide limit structure can refer to that of the second guide limit structure, and will not be described in detail here.

[0045] It is conceivable that the second unlocking device described above can also be configured in other ways. For example, the second unlocking device may include a first locking bolt, which is screwed onto the lever 310 and abuts against the water inlet pipe 100. By tightening or loosening the first locking bolt, the lever 310 can be locked or unlocked.

[0046] It should be noted that the first unlocking device described above can also be configured in other ways. For example, the first unlocking device may include a second locking bolt, which is screwed onto the valve body assembly 200 and abuts against the water inlet pipe 100. Thus, by tightening or loosening the second locking bolt, the valve body assembly 200 can be locked or unlocked. With this configuration, the second unlocking device is not required.

[0047] Reference Figure 2 and Figure 3According to some embodiments of this utility model, the valve body assembly 200 includes a housing 210, a switching valve 220, and a floating device 230. One end of the housing 210 is sleeved on the inlet pipe 100, or the inlet pipe 100 is sleeved on one end of the housing 210. The aforementioned slot 214 is disposed on the housing 210, and the aforementioned locking block 211 or first locking groove 121 is disposed on the housing 210. The switching valve 220 is installed on the valve body assembly 200. The floating device 230 is vertically and vertically installed on the valve body assembly 200. The floating device 230 is drively connected to the switching valve 220 to control the opening and closing of the switching valve 220. The input pipe 221 of the switching valve 220 is vertically and vertically inserted into the inlet pipe 100, and the water inlet channel 110 in the inlet pipe 100 communicates with the input pipe 221 of the switching valve 220. Through the above arrangement, while achieving height adjustment of the valve body assembly 200, the communication between the valve body assembly 200 and the inlet pipe 100 is maintained. Since the on / off valve 220, the floating device 230 and the valve body assembly 200 are integrated together, the entire inlet valve can have a smaller volume.

[0048] In the specific implementation process, in order to prevent leakage between the input pipe 221 and the water inlet pipe 100, a sealing ring can be installed on the input pipe 221.

[0049] Reference Figure 2 When the aforementioned inlet valve is applied to the toilet tank, when the water level in the tank is lower than the floating device 230, the floating device 230 will automatically descend under its own weight, thereby opening the switch valve 220. At this time, tap water can flow from the inlet pipe 100 into the input pipe 221 and then through the switch valve 220 into the tank. When the water level in the tank rises to a certain height, the floating device 230 also rises to a certain height along with the water level, thereby closing the switch valve 220. At this time, tap water cannot flow into the tank through the switch valve 220.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A height-adjustable inlet valve, characterized in that, include: Water inlet pipe (100); A valve body assembly (200) is provided with one end inserted into the water inlet pipe (100). One of the valve body assembly (200) and the water inlet pipe (100) is provided with a locking block (211), and the other is provided with a plurality of first locking slots (121) for engaging with the locking block (211). All the first locking slots (121) are arranged along the axial direction of the water inlet pipe (100). The valve body assembly (200) can rotate circumferentially and move axially relative to the water inlet pipe (100) so that the locking block (211) can enter and exit any one of the first locking slots (121). The valve body assembly (200) and the water inlet pipe (100) are each provided with a positioning part (311). The positioning part (311) is elastically movable radially along the water inlet pipe (100). During the axial movement of the valve body assembly (200) relative to the water inlet pipe (100), the positioning part (311) can enter and exit either of the first slots (121). When the positioning part (311) is engaged in one of the first slots (121), the locking block (211) is aligned with the other first slot (121); or, One of the valve body assembly (200) and the water inlet pipe (100) is provided with a positioning part (311), and the other is provided with a plurality of second slots arranged along the axial direction of the water inlet pipe (100). The positioning part (311) can move elastically along the radial direction of the valve body assembly (200). During the axial movement of the valve body assembly (200) relative to the water inlet pipe (100), the positioning part (311) can enter and exit any one of the second slots. When the positioning part (311) is engaged in one of the second slots, the locking block (211) is aligned with one of the first slots (121).

2. The adjustable height inlet valve according to claim 1, characterized in that, A first unlocking device is provided between the valve body assembly (200) and the water inlet pipe (100). When the card block (211) is locked in one of the first card slots (121), the first unlocking device can restrict the valve body assembly (200) from rotating or unlock the valve body assembly (200).

3. The adjustable height inlet valve according to claim 2, characterized in that, The first unlocking device includes a lever (310), which is mounted on the valve body assembly (200) and can slide along the axial direction of the water inlet pipe (100). The positioning part (311) is connected to the lever (310). The locking block (211) is disposed on the valve body assembly (200), and the first locking groove (121) is disposed on the water inlet pipe (100). The water inlet pipe (100) is provided with a plurality of positioning steps (120) along the axial direction. The first locking groove (121) or the second locking groove is formed by two corresponding adjacent positioning steps (120). The locking block (211) When the lever (310) is engaged in one of the first slots (121), the positioning part (311) is located outside the first slot (121) or the second slot so that the lever (310) can drive the positioning part (311) to slide between the first position and the second position. When the positioning part (311) slides to the first position, the positioning part (311) abuts against the positioning step (120) to restrict the rotation of the valve body assembly (200). When the positioning part (311) slides to the second position, the positioning part (311) avoids the positioning step (120) to allow the valve body assembly (200) to rotate.

4. The adjustable height inlet valve according to claim 3, characterized in that, A second unlocking device is provided between the lever (310) and the valve body assembly (200). When the lever (310) drives the positioning part (311) to slide to the first position, the second unlocking device can restrict the movement of the lever (310) or unlock the lever (310).

5. The adjustable height inlet valve according to claim 4, characterized in that, The second unlocking device includes a paddle (320) mounted on the lever (310). The paddle (320) can slide relative to the lever (310) along the circumference of the water inlet pipe (100). A locking position (212) is provided between the paddle (320) and the valve body assembly (200), and a locking part (321) is provided on the other side. By sliding the paddle (320) relative to the lever (310) in the circumference, the locking part (321) and the locking position (212) can be locked together or disengaged from each other.

6. The adjustable height inlet valve according to claim 5, characterized in that, A first guide limiting structure is provided between the lever (310) and the paddle (320), which can limit the sliding range of the paddle (320).

7. The adjustable height inlet valve according to claim 3, characterized in that, A second guide limiting structure is provided between the lever (310) and the valve body assembly (200), which can limit the sliding range of the lever (310).

8. The adjustable height inlet valve according to claim 7, characterized in that, The second guide limiting structure includes two gear holes (312) and a limiting post (213). The two gear holes (312) are spaced apart along the axial direction of the water inlet pipe (100) on the lever (310), and the two gear holes (312) are connected. The limiting post (213) is disposed on the valve body assembly (200) and can be inserted into any one of the gear holes (312). The lever (310) is provided with two clearance holes (313) spaced apart along the circumferential direction of the water inlet pipe (100). The two gear holes (312) are located between the two clearance holes (313) so that the opposite side walls of the gear holes (312) are elastic. The limiting post (213) can move between the two gear holes (312).

9. The adjustable height inlet valve according to claim 1, characterized in that, The valve body assembly (200) includes a housing (210), a switching valve (220), and a floating device (230). One end of the housing (210) is sleeved on the water inlet pipe (100). The switching valve (220) is installed on the housing (210). The floating device (230) is installed on the housing (210) in a vertically movable manner. The floating device (230) is connected to the switching valve (220) to control the opening and closing of the switching valve (220). The input pipe (221) of the switching valve (220) is inserted vertically into the water inlet pipe (100), and the water inlet channel (110) in the water inlet pipe (100) is connected to the input pipe (221) of the switching valve (220).

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