A water inlet valve water level adjustment mechanism

Abstract

The present invention discloses a water inlet valve water level adjusting mechanism, which includes a valve body, a water guide pipe, a floating bucket, a floating shell and an adjusting screw. A first accommodation cavity adapted to the floating shell is formed at the top of the floating bucket. The bottom of the floating shell is open, and the floating shell is movably arranged in the first accommodation cavity and is threadedly connected with the adjusting screw. A driving wheel and a driven wheel are rotatably arranged on the floating bucket, and the driving wheel can drive the driven wheel to rotate. A fixed screw parallel to the adjusting screw is arranged on the water guide pipe, and the driven wheel is in threaded cooperation with the fixed screw. The valve body is arranged at the top of the water guide pipe, and a water sealing arm connected to the adjusting screw is arranged on the valve body. The adjusting screw is arranged in the driving wheel, rotates synchronously with the driving wheel and can slide axially relative to the driving wheel. When the adjusting screw rotates, it drives the floating bucket and the floating shell to rise and fall synchronously. When the adjusting screw rises, it drives the water sealing arm to close the valve body. The water level adjustment range of the present invention is wide, and it has a small volume and good working stability.

Description

Technical Field

[0001] The present invention relates to the technical field of toilet water inlet valves, and particularly to a water level adjusting mechanism for a water inlet valve. Background Art

[0002] A water inlet valve usually needs to cooperate with water tanks of different heights and volumes. If there is not enough working water level adjustment range, the applicable range of the water inlet valve will be greatly reduced.

[0003] As Figure 1 shown, many water inlet valves on the market currently adopt a structure in which a floating bucket and a floating shell are adjusted synchronously. The structure of the floating bucket and the floating shell adjustment is basically the same as that disclosed in the Chinese invention patent with the publication number CN110106948A, which discloses an anti-siphon toilet water tank water inlet valve. It mainly cooperates the floating bucket 1' with the floating shell 2', threadedly connects the adjusting rod 3' with external threads to the floating bucket 1', and threadedly connects the movable nut sleeve 4' with external threads to the floating shell 2'. By synchronously rotating the adjusting rod 3' and the movable nut sleeve 4', the synchronous lifting of the floating bucket 1' and the floating shell 2' is driven.

[0004] This adjustment method can conveniently adjust the working water level in the water tank when the water inlet valve automatically stops water. However, its water level adjustment range is affected by the heights of the floating bucket and the floating shell. To achieve a large adjustment range, only the parts where the adjusting rod is matched with the floating bucket and the floating shell is matched with the movable nut sleeve can be made longer accordingly. If the floating bucket and the floating shell are lengthened as a whole, the installation space will be greatly increased. At the same time, it will also cause the opening height of the water inlet valve to become larger when it is reopened, which is not conducive to the water volume adjustment requirements of the drain valve. If only the parts where the floating bucket is matched with the adjusting rod and the floating shell is matched with the movable nut sleeve are lengthened, in addition to increasing the installation space, the bottom of the chamber for accommodating the nut sleeve in the floating bucket sinks relative to the inner cavity of the floating bucket. The space of the chamber for accommodating the nut sleeve is narrow and closed, and it is very easy to accumulate dirt. If there is sediment accumulation, the water inlet valve will not be able to intake water normally. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a water level adjusting mechanism for a water inlet valve, which has a wide water level adjustment range, small volume and good working stability.

[0006] To solve the above technical problem, the present invention provides a water level adjusting mechanism for a water inlet valve, including a valve body, a water guide pipe, a floating bucket, a floating shell and an adjusting screw.

[0007] A first accommodating cavity adapted to the floating shell is formed at the top of the floating bucket. The bottom of the floating shell is open, and the floating shell is movably arranged in the first accommodating cavity and is threadedly connected to the adjusting screw.

[0008] A driving wheel and a driven wheel are rotatably arranged on the floating bucket, and the driving wheel can drive the driven wheel to rotate.

[0009] A fixed screw parallel to the adjusting screw is provided on the water conduit, and the driven wheel is in threaded engagement with the fixed screw;

[0010] The valve body is arranged on the top of the water conduit, and a water sealing arm connected to the adjusting screw is provided on the valve body;

[0011] The adjusting screw passes through the driving wheel, rotates synchronously with the driving wheel and can slide relatively in the axial direction. When the adjusting screw rotates, it drives the floating bucket and the floating shell to lift and lower synchronously. When the adjusting screw is lifted, it drives the water sealing arm to close the valve body.

[0012] As an improvement of the above solution, external threads with equal pitches are provided on the adjusting screw and the fixed screw, and the module and number of teeth of the driving wheel and the driven wheel are the same.

[0013] As an improvement of the above solution, the water conduit is arranged parallel to the adjusting screw. The floating bucket is provided with a second accommodation cavity axially penetrated by the water conduit. A guide rail is arranged on the outer wall of the water conduit along the axial direction, and a first guide groove adapted to the guide rail is arranged on the cavity wall of the second accommodation cavity.

[0014] As an improvement of the above solution, a limiting rib is provided above the floating bucket on the water conduit. The length of the threaded section of the top of the adjusting screw extending out of the floating shell is equal to the distance from the upper end face of the floating bucket to the limiting rib.

[0015] The length of the threaded section of the top of the adjusting screw extending out of the floating shell is equal to the distance from the upper end face of the floating bucket to the limiting rib.

[0016] As an improvement of the above solution, an assembly clip adapted to the driving wheel and the driven wheel is provided on the floating bucket. Fixed seats are provided on both the driving wheel and the driven wheel. An annular rib is provided on the outside of the fixed seat, and the annular rib abuts against the upper end face of the assembly clip.

[0017] As an improvement of the above solution, the assembly clip includes two elastic arms. The elastic arms are bent to form a clamping groove adapted to the fixed seat. The two elastic arms are symmetrically arranged, and the two clamping grooves communicate with each other.

[0018] As an improvement of the above solution, the floating bucket is provided with a third accommodation cavity axially penetrated by the adjusting screw and the fixed screw, and the assembly clip is arranged on the inner wall of the third accommodation cavity.

[0019] As an improvement of the above solution, the adjusting screw is coaxially arranged with the driving wheel. The adjusting screw is provided with a second guide groove along the axial direction. A protrusion adapted to the second guide groove is arranged on the inner wall surface of the driving wheel. A preset distance is provided between the groove wall of the second guide groove and the protrusion.

[0020] As an improvement of the above solution, a support member is provided on the outer wall of the valve body. The middle part of the water sealing arm abuts against the support member. One end of the water sealing arm is movably connected to the adjusting screw rod, and a water sealing member is provided at the other end. When the adjusting screw rod is lifted, it drives the water sealing arm to flip, and drives the water sealing member to block the pressure relief hole of the valve body.

[0021] Implementing the present invention has the following beneficial effects:

[0022] The present invention discloses a water inlet valve water level adjustment mechanism. By threadedly connecting the adjusting screw rod with the floating shell and passing it through the driving wheel on the floating bucket, the fixed screw rod on the water guide pipe is threadedly matched with the driven wheel on the floating bucket. The fixed screw rod is arranged parallel to the adjusting screw rod. When the adjusting screw rod is rotated, the driving wheel linked to it drives the driven wheel to rotate in the opposite direction. The driven wheel together with the floating bucket moves along the axial direction of the fixed screw rod. At the same time, the floating shell moves along the axial direction of the adjusting screw rod, realizing the synchronous movement of the floating shell and the floating bucket. By rotating the adjusting screw rod forward or backward, the floating shell and the floating bucket are synchronously lifted and lowered in the water tank;

[0023] When the water level in the water tank rises to the top of the floating bucket, the floating shell in the floating bucket is lifted by the buoyancy force, driving the adjusting screw rod to lift, and driving the water sealing arm to close the valve body, realizing automatic closing of the water inlet;

[0024] The present invention can conveniently achieve stepless fine adjustment of the water level, and the water level adjustment range is not affected by the height of the floating bucket and the floating shell. It can achieve a small volume and a wide water level adjustment range;

[0025] Moreover, there is no narrow and enclosed space between the floating bucket and the floating shell that is prone to dirt accumulation and affects the operation of the water inlet valve, and the working stability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the existing water inlet valve water level adjustment structure;

[0027] Figure 2 is a schematic diagram of the structure of an embodiment of a water inlet valve water level adjustment mechanism of the present invention;

[0028] Figure 3 is Figure 2 a partial longitudinal sectional structure diagram;

[0029] Figure 4 is Figure 3 a disassembled structure diagram;

[0030] Figure 5 is Figure 3 a cross-sectional structure diagram of the driving wheel and the adjusting screw rod;

[0031] Figure 6 is Figure 2 a longitudinal sectional structure diagram of the valve body and the water guide pipe. Detailed implementation mode

[0032] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] As Figure 2 、 Figure 3 and Figure 4 shown, this embodiment provides an embodiment of a water inlet valve water level regulating mechanism, which includes a valve body 1, a water guide pipe 2, a floating bucket 3, a floating shell 4 and an adjusting screw 5. A first accommodation cavity 31 adapted to the floating shell 4 is provided at the top of the floating bucket 3. The bottom of the floating shell 4 is open. The floating shell 4 is movably arranged in the first accommodation cavity 31 and is threadedly connected to the adjusting screw 5. A driving wheel 6 and a driven wheel 7 are rotatably arranged on the floating bucket 3. The driving wheel 6 can drive the driven wheel 7 to rotate. A fixed screw 21 parallel to the adjusting screw 5 is provided on the water guide pipe 2. The driven wheel 7 is in threaded cooperation with the fixed screw 21. The valve body 1 is arranged at the top of the water guide pipe 2. A water sealing arm 11 connected to the adjusting screw 5 is provided on the valve body 1. The adjusting screw 5 passes through the driving wheel 6, rotates synchronously with the driving wheel 6 and can slide axially relative to it. When the adjusting screw 5 rotates, it drives the floating bucket 3 and the floating shell 4 to lift and lower synchronously. When the adjusting screw 5 is lifted, it drives the water sealing arm 11 to close the valve body 1.

[0034] In this embodiment, the adjusting screw 5 is threadedly connected to the floating shell 4 and passes through the driving wheel 6 on the floating bucket 3. The fixed screw 21 on the water guide pipe 2 is in threaded cooperation with the driven wheel 7 on the floating bucket 3. The fixed screw 21 is parallel to the adjusting screw 5. When the adjusting screw 5 rotates, the driving wheel 6 linked to it drives the driven wheel 7 to rotate in the opposite direction. The driven wheel 7 together with the floating bucket 3 moves along the axial direction of the fixed screw 21. At the same time, the floating shell 4 moves along the axial direction of the adjusting screw 5, realizing the synchronous movement of the floating shell 4 and the floating bucket 3. By rotating the adjusting screw 5 forward or backward, the floating shell 4 and the floating bucket 3 are synchronously lifted and lowered in the water tank. When the water level in the water tank rises to the top of the floating bucket 3, the floating shell 4 in the floating bucket 3 is lifted by the buoyancy force, driving the adjusting screw 5 to lift and driving the water sealing arm 11 to close the valve body 1, realizing automatic closing of the water inlet. This embodiment can conveniently achieve stepless fine adjustment of the water level, and the water level adjustment range is not affected by the heights of the floating bucket 3 and the floating shell 4. It can achieve a small volume and a wide water level adjustment range. Moreover, there is no narrow and closed space between the floating bucket 3 and the floating shell 4 that is prone to dirt accumulation and affects the operation of the water inlet valve, and the working stability is good.

[0035] To facilitate the synchronous lifting and lowering of the floating shell 4 and the floating barrel 3 when rotating and adjusting the adjusting screw 5, the adjusting screw 5 and the fixing screw 21 in this embodiment are provided with external threads having equal pitches. The module and the number of teeth of the driving wheel 6 and the driven wheel 7 are the same, so as to ensure that when the adjusting screw 5 is rotated, the driving wheel 6 and the driven wheel 7 rotate by the same angle and move the same distance on the adjusting screw 5 and the fixing screw 21. In addition, the external threads on the adjusting screw 5 and the fixing screw 21 have the same helix direction. The driving wheel 6 and the driven wheel 7 can be directly meshed to realize the synchronous lifting and lowering of the floating shell 4 and the floating barrel 3 without the aid of an intermediate gear, simplifying the transmission structure.

[0036] The external threads on the adjusting screw 5 and the fixing screw 21 are preferably the more common right-handed threads. When the adjusting screw 5 is rotated clockwise, the floating shell 4 and the floating barrel 3 move upward synchronously; otherwise, they move downward.

[0037] To further improve the stability of the lifting of the floating barrel 3, the water guide pipe 2 in this embodiment is arranged parallel to the adjusting screw 5. The floating barrel 3 is provided with a second accommodation cavity 32 for the axial penetration of the water guide pipe 2. The outer wall of the water guide pipe 2 is provided with a guide rail 22 along the axial direction, and the cavity wall of the second accommodation cavity 32 is provided with a first guide groove adapted to the guide rail 22.

[0038] To ensure the effectiveness of adjusting the water level each time, the water guide pipe 2 is provided with a limiting rib 23 above the floating barrel 3. The length of the threaded section of the top of the adjusting screw 5 extending out of the floating shell 4 is equal to the distance from the upper end face of the floating barrel 3 to the limiting rib 23, so that the lifting and lowering strokes of the floating barrel 3 and the floating shell 4 are consistent. The limiting rib 23 is preferably formed on the guide rail 22.

[0039] The floating barrel 3 is provided with an assembly clip 33 adapted to the driving wheel 6 and the driven wheel 7. The driving wheel 6 is provided with a fixing seat 61, and the driven wheel 7 is provided with a fixing seat 71. The outer sides of the fixing seat 61 and the fixing seat 71 are both provided with annular ribs, and the annular ribs are in contact with the upper end face of the assembly clip 33. The assembly clip 33 includes two elastic arms, and the elastic arms are bent to form a clamping groove adapted to the fixing seat 61 and the fixing seat 71. The clamping grooves formed by the two elastic arms are communicated with each other, which is convenient for improving the assembly efficiency. The elastic action of the elastic arms makes it easy for the driving wheel 6 and the driven wheel 7 to enter and difficult to exit. And the rotation directions of the driving wheel 6 and the driven wheel 7 are opposite during the rotation process, and the friction force directions between the driving wheel 6, the driven wheel 7 and the corresponding elastic arms on the assembly clip 33 are also opposite. Forming a symmetric structure for the two elastic arms can make the overall force of the assembly clip 33 more balanced.

[0040] The floating barrel 3 is provided with a third accommodation cavity 34 for the axial penetration of the adjusting screw 5 and the fixing screw 21, and the assembly clip 33 is arranged on the inner wall of the third accommodation cavity 34.

[0041] CombinedFigure 5 The adjusting screw rod 5 is coaxially arranged with the driving wheel 6. The adjusting screw rod 5 is axially provided with a second guiding groove 51, and a protrusion 62 adapted to the second guiding groove 51 is provided on the inner wall surface of the driving wheel 6. A preset distance is provided between the groove wall of the second guiding groove 51 and the protrusion 62. When the adjusting screw rod 5 rotates, torque is transmitted between the groove wall of the second guiding groove 51 and the protrusion 62 on the inner wall surface of the driving wheel 6. The adjusting screw rod 5 drives the driving wheel 6 to rotate. When the adjusting screw rod 5 axially moves, that is, rises and falls together with the floating shell 4, there is no interference between the driving wheel 6 and the adjusting screw rod 5, ensuring that the adjusting screw rod 5 smoothly drives the water sealing arm 11 to open or close the valve body 1. The guiding grooves are arranged in multiple groups in the circumferential direction of the adjusting screw rod 5 to make the torque transmission more balanced.

[0042] Combined with Figure 6 In the valve body 1, there are an inlet cavity 12, an outlet cavity 13 and a back pressure cavity 14. A water stop pad 15 is provided between the inlet cavity 12, the outlet cavity 13 and the back pressure cavity 14. The water stop pad 15 is provided with a water inlet hole 151 communicating with the inlet cavity 12. A valve needle 152 is inserted into the water inlet hole 151. The back pressure cavity 14 is provided with a pressure relief hole 141 communicating with the outside. The water sealing member 111 on the water sealing arm 11 is arranged outside the pressure relief hole 141. A support member 16 is provided on the outer wall of the valve body 1. The middle part of the water sealing arm 11 abuts against the support member 16. One end of the water sealing arm 11 is movably connected with the adjusting screw rod 5, and the other end is provided with a water sealing member 111. When the adjusting screw rod 5 rises, it drives the water sealing arm 11 to turn over and drives the water sealing member 111 to block the pressure relief hole 141 of the valve body 1.

[0043] A water outlet 35 is opened at the bottom of the floating bucket 3. A floating plug 36 is provided below the water outlet 35. The floating plug 36 blocks the water outlet 35 when the water pressure outside the floating bucket 3 is greater than the internal water pressure.

[0044] The working process of the inlet valve of the present invention is as follows:

[0045] When the water in the water tank is drained, the water level inside the floating bucket 3 is higher than the water level outside, that is, the water level of the water tank. Under the action of the internal water pressure of the floating bucket 3, the floating plug 36 falls back, and the water inside the floating bucket 3 is discharged outside through the water outlet at the floating plug 36. The water level inside the floating bucket 3 drops, driving the floating shell 4 to drop; at this time, the floating shell 4 drives the adjusting screw rod 5 threadedly connected thereto to drop synchronously, driving the water sealing arm 11 to turn over, opening the pressure relief port, and water enters the water tank from the inlet cavity 12, the outlet cavity 13 and the water guide pipe 2. At the same time, a small part of the water enters the back pressure cavity 14 through the water inlet hole 151 and then flows out through the pressure relief hole 141. At this time, the purpose of water inlet is achieved;

[0046] When the water level in the water tank rises to the lower end face of the float bucket 3, the float plug 36 will gradually block the water outlet 35. When the water level in the water tank rises to the upper end face of the float bucket 3, overflow starts into the float bucket 3. At this time, the float shell 4 floats under the action of the water pressure inside the float bucket 3, driving the adjusting screw rod 5 threadedly connected thereto to rise synchronously, driving the water sealing arm 11 to rotate in the reverse direction. The water sealing member 111 on the water sealing arm 11 blocks the pressure relief hole 141 of the inlet valve, preventing the pressure relief hole 141 from draining water outward, and forming a sealed space inside the inlet valve. Since the water contact area of the water stop pad 15 on the back pressure chamber 14 side is larger than that on the water inlet chamber 12 side, the water pressure on the back pressure chamber 14 side acting on the water stop pad 15 is greater. The water pressure on the back pressure chamber 14 side causes the water stop pad 15 to block the water inlet chamber 12. At the same time, the moment the water sealing member 111 blocks the pressure relief hole 141, the water in the water inlet chamber 12 continues to enter the back pressure chamber 14 through the water inlet hole 151, causing the water pressure in the back pressure chamber 14 to suddenly increase, resulting in elastic expansion and deformation to block the water inlet hole 151, cutting off the water flow between the water inlet chamber 12 and the water outlet chamber 13, achieving the purpose of water stop, and the inlet valve stops water intake.

[0047] The above-disclosed is only a preferred embodiment of the present invention. Of course, it cannot be used to limit the scope of the rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A water inlet valve water level adjusting mechanism, characterized in that, It includes a valve body, a water guide pipe, a floating bucket, a floating shell and an adjusting screw rod. A first accommodation cavity adapted to the floating shell is formed at the top of the floating bucket. The bottom of the floating shell is open, and the floating shell is movably arranged in the first accommodation cavity and is in threaded connection with the adjusting screw rod. A driving wheel and a driven wheel are rotatably arranged on the floating bucket, and the driving wheel can drive the driven wheel to rotate. A fixed screw rod parallel to the adjusting screw rod is arranged on the water guide pipe, and the driven wheel is in threaded fit with the fixed screw rod. The floating bucket is provided with a third accommodation cavity axially penetrating through the adjusting screw rod and the fixed screw rod. The valve body is arranged at the top of the water guide pipe, and a water sealing arm connected to the adjusting screw rod is arranged on the valve body. The adjusting screw rod is arranged in the driving wheel, rotates synchronously with the driving wheel and can slide relatively in the axial direction. When the adjusting screw rod rotates, it drives the floating bucket and the floating shell to lift and lower synchronously. When the adjusting screw rod is lifted, it drives the water sealing arm to close the valve body. An assembly clamp adapted to the driving wheel and the driven wheel is arranged on the floating bucket. Fixed seats are arranged on both the driving wheel and the driven wheel. An annular rib is arranged on the outer side of the fixed seat, and the annular rib abuts against the upper end surface of the assembly clamp. The assembly clamp includes two elastic arms, the elastic arms are bent to form a clamping groove adapted to the fixed seat, the two elastic arms are symmetrically arranged, and the two clamping grooves communicate with each other. The assembly clamp is arranged on the inner wall of the third accommodation cavity.

2. The water inlet valve water level adjustment mechanism according to claim 1, characterized in that, External threads with equal pitches are arranged on the adjusting screw rod and the fixed screw rod, and the module and number of teeth of the driving wheel and the driven wheel are the same.

3. The water inlet valve water level adjustment mechanism according to claim 2, characterized in that, The external threads on the adjusting screw rod and the fixed screw rod have the same helix direction, and the driving wheel meshes with the driven wheel.

4. The water inlet valve water level adjusting mechanism according to claim 1 or 2, characterized in that, The water guide pipe is arranged parallel to the adjusting screw rod. The floating bucket is provided with a second accommodation cavity axially penetrating through the water guide pipe. A guide rail is arranged on the outer wall of the water guide pipe along the axial direction, and a first guide groove adapted to the guide rail is arranged on the cavity wall of the second accommodation cavity.

5. The water inlet valve water level regulating mechanism according to claim 4, characterized in that, A limiting rib is arranged on the water guide pipe above the floating bucket. The length of the threaded section where the top of the adjusting screw rod extends out of the floating shell is equal to the distance from the upper end surface of the floating bucket to the limiting rib.

6. The water inlet valve water level adjustment mechanism according to claim 1, characterized in that, The adjusting screw rod is coaxially arranged with the driving wheel. The adjusting screw rod is axially provided with a second guide groove. A protrusion adapted to the second guide groove is arranged on the inner wall surface of the driving wheel. A preset distance is arranged between the groove wall of the second guide groove and the protrusion. Multiple groups of the second guide grooves are arranged in the circumferential array of the adjusting screw rod.

7. The water inlet valve water level adjustment mechanism according to claim 1, characterized in that, A support member is arranged on the outer wall of the valve body. The middle part of the water sealing arm abuts against the support member. One end of the water sealing arm is movably connected to the adjusting screw rod, and a water sealing member is arranged at the other end. When the adjusting screw rod is lifted, it drives the water sealing arm to turn over and drives the water sealing member to block the pressure relief hole of the valve body.

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