A leak-proof inlet valve

Abstract

The present invention discloses a water leakage prevention inlet valve, which includes a water inlet pipe, a water storage tank, a water stop valve, a water stop switch, a small float, a drainage siphon and a magnetic attraction structure; a siphon chamber and an overflow chamber are arranged side by side in the water storage tank, and a water overflow port is arranged between the siphon chamber and the overflow chamber; the water storage tank is installed on the water inlet pipe, and a water replenishing port is opened on the water inlet pipe, the water replenishing port is located above the siphon chamber and communicates with the siphon chamber, a drainage siphon is arranged in the siphon chamber, a drainage port is opened at the bottom of the siphon chamber, one end of the drainage siphon is connected to the drainage port, and the other end of the drainage siphon is suspended at the bottom of the siphon chamber; a small float is arranged in the overflow chamber, a driving part is arranged at the top of the small float, a water stop switch is arranged above the driving part, and the driving part floats with the small float to trigger the water stop switch to block the water inlet through the magnetic attraction structure. The present invention can automatically control water stop through the added water stop structure and magnetic attraction structure, solve the water leakage problem, and has novel structure and long service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of sanitary ware water fittings, and particularly relates to a leak-proof water inlet valve. Background Art

[0002] The water inlet valve of the existing toilet water tank mainly uses the water pressure in the domestic water supply pipe network to achieve water inlet or blockage, and includes a water inlet pipe, a back pressure valve, a buoyancy control mechanism, a water inlet channel, and a water outlet channel. The back pressure valve is installed on the water inlet pipe, the water inlet pipe is connected to the water inlet pipe, and the buoyancy control mechanism controls the formation of water pressure or pressure relief in the internal pressure chamber of the back pressure valve to realize the on-off of the water flow between the water inlet channel and the water outlet channel. Among them, the toilet water tank water inlet valve is divided into a back pressure water inlet valve and a needle valve water inlet valve according to different structures of the water stop valve. Both rely on installing a water stop pad inside the water stop valve to form a pressure chamber, and rely on the elastic deformation of the water stop pad to block the water stop surface of the water inlet channel to realize the on-off of the water flow. For example, when the pressure relief hole of the back pressure water inlet valve is blocked, the amount of water in the water stop chamber increases, and the water stop pad is expanded to block the connection between the water inlet channel and the water outlet channel. However, both the back pressure water inlet valve and the needle valve water inlet valve may fail, and the failure will cause the water inlet valve to continuously supply water to the water tank, resulting in a leakage phenomenon and wasting water resources. Summary of the Invention

[0003] The purpose of the present invention is to provide a leak-proof water inlet valve, which can automatically control water stop through an additional water stop structure and a magnetic attraction structure, solve the leakage problem, and has a novel structure and a long service life.

[0004] To achieve the above object, the solution of the present invention is: a leak-proof water inlet valve, including a water inlet pipe, a water storage tank, a water stop valve, a water stop switch, a small float, a drainage siphon, and a magnetic attraction structure;

[0005] The water storage tank penetrates a water inlet pipe for supplying water to the toilet water tank. A water stop chamber and a water receiving tray communicating with the water stop chamber are provided at the top of the water inlet pipe. The water stop chamber is for installing the water stop valve, the water receiving tray is provided with the water receiving port, the top of the water stop valve is provided with a pressure relief hole, and the pressure relief hole is connected to the water receiving port through the water receiving tray;

[0006] A siphon chamber and an overflow chamber are arranged side by side in the water storage tank, and an overflow port is provided between the siphon chamber and the overflow chamber; a water replenishing hole is opened in the upper part of the siphon chamber, the water replenishing hole is located below the water receiving port, a drainage port is opened at the bottom of the siphon chamber, and the drainage port communicates with the toilet water tank; a drainage siphon is arranged in the siphon chamber, one end of the drainage siphon is connected to the drainage port, and the other end of the drainage siphon is suspended at the bottom of the siphon chamber;

[0007] The water inlet pipe is provided with a water inlet channel and a water outlet channel. A water stop cavity is arranged in the water outlet channel. A water passing cavity is arranged between the water inlet channel and the water outlet channel. One end of the water passing cavity is a water passing surface for the water in the water inlet channel to pass into the water outlet channel, and the other end is provided with an installation opening; a water stop switch is installed at the installation opening. The water stop switch includes a knob, a screw rod, a switch bracket, an elastic pin, a coil spring, and a plunger.

[0008] The switch bracket is installed at the installation opening. An internal threaded hole is axially arranged at the center of the switch bracket. The rod body of the screw rod is provided with an external thread. The screw rod is fitted and passed through the internal threaded hole. The outer end of the screw rod is slidably sleeved with the knob and circumferentially limited with the knob. The knob axially slides relative to the switch bracket, and the sliding direction of the knob is opposite to the moving direction of the screw rod. The inner end of the screw rod is provided with a plunger. The screw rod actively pushes against the plunger to open or block the water passing surface. The coil spring is arranged between the knob and the switch bracket with a compressed initial state. A pin hole is opened on one side of the switch bracket, and an elastic pin is arranged in the pin hole. A clamping portion is arranged on the side of the knob for the elastic pin to be clamped.

[0009] A small floating cylinder is arranged in the overflow cavity. A driving portion is arranged at the top of the small floating cylinder. A water stop switch is arranged above the driving portion; a magnetic attraction structure is arranged between the driving portion and the elastic pin. The driving portion moves up and down with the small floating cylinder and actively magnetically attracts the elastic pin. When the driving portion magnetically attracts the elastic pin, the screw rod pushes against the plunger to block the water passing surface.

[0010] As a preferred solution, the switch bracket is provided with an installation post. An internal threaded hole is arranged inside the installation post. The inner end of the installation post is fitted and inserted into the water passing cavity from the installation opening. The outer end of the installation post is sleeved with the coil spring. One end of the coil spring abuts against the knob, and the other end abuts against the switch bracket.

[0011] As a preferred solution, a first O-ring is arranged between the screw rod and the internal threaded hole. A second O-ring is sleeved at the insertion part of the inner end of the installation post and the water passing cavity. A conical plug is formed in the middle of the end of the screw rod. A central through hole is opened at the position of the plunger corresponding to the conical plug. When the screw rod actively pushes against the plunger, the conical plug is hermetically inserted into the central through hole, so that a back pressure cavity is formed on the back of the plunger by the internal threaded hole.

[0012] As a preferred solution, the magnetic attraction structure includes a first magnet and a second magnet. The driving portion of the small floating cylinder is located at the lower side of the elastic pin. A second magnet is arranged outside the elastic pin. A first magnet is arranged on the driving portion to magnetically attract the second magnet so that the elastic pin slides and contracts and disengages from the clamping portion.

[0013] As a preferred solution, a water collecting area is convexly arranged on the surface of the water storage tank below the water replenishing hole. The water collecting area is surrounded by a retaining edge protruding from the top of the water storage tank. A water collecting hole communicating with the siphon cavity is opened in the water collecting area.

[0014] As a preferred solution, the water collection area is conical in the area enclosed at the top of the water storage tank, and the lower part of the water replenishment hole corresponds to the wide part of the cone, and the wide part gradually converges to the narrow part where the water collection hole is located.

[0015] As a preferred solution, the water collecting hole is concave to form a float cavity, a float is arranged in the float cavity, a connecting hole is provided at the bottom of the float cavity, and the upper end surface of the float is used to movably block the water collecting hole.

[0016] As a preferred solution, the water stop switch is arranged below the water receiving tray, a water hole is opened at the top of the water stop switch below the corresponding water replenishment hole, a drain hole is opened at the bottom of the water stop switch above the wide part of the water collection area, and a water passage is provided in the water stop switch for connecting the water hole and the drain hole.

[0017] As a preferred embodiment, the bottom of the overflow chamber is provided with a drainage end face, a valve chamber and a one-way water outlet valve, the one-way water outlet valve includes a valve stem, a compression spring, a valve cover and a sealing gasket, the valve cover is covered on the bottom of the valve chamber and the valve cover is provided with a through hole and a drainage microhole, a valve stem, a compression spring and a sealing gasket are arranged in the valve chamber, the middle section of the valve stem is provided with an annular flange, the sealing gasket and the compression spring are sleeved on the valve stem, the sealing gasket is located on the upper end face of the annular flange and blocks the drainage end face, the compression spring is located between the lower end face of the annular flange and the valve cover, the through hole is provided for the lower section of the valve stem to pass through, the upper section of the valve stem extends into the overflow chamber, and the bottom of the small float is provided with a yield groove corresponding to the upper section of the valve stem.

[0018] As a preferred solution, a partition is provided between the siphon chamber and the overflow chamber, and an overflow port is formed on the upper portion of the partition.

[0019] As a preferred solution, the water stop valve is a back pressure valve.

[0020] After adopting the above scheme, the gain effect of the present invention is:

[0021] 1. The present invention rationally utilizes the structure of the water storage tank, arranges an overflow chamber side by side on the basis of the siphon chamber, arranges a water replenishment hole on the top, and the overflow port is arranged between the siphon chamber and the overflow chamber. When water leaks, the water replenishment characteristic of the back pressure valve is utilized, and the water level of the siphon chamber will pass over the overflow port and enter the overflow chamber. The overflow mechanism of the overflow chamber triggers the water stopping mechanism to realize automatic control of water stopping, thereby eliminating the need for manual water stopping. The present invention has a compact and small structure and can be applied to most water inlet valves.

[0022] 2. When the water stop valve fails, the present invention can stop water through the water stop switch. The water stop switch designed in the present invention has a clever structure, including a knob, a screw rod, a switch bracket, an elastic pin, a coil spring, and a plunger; the elastic pin can latch the knob and the screw rod to make the knob and the screw rod static. Only when an external force triggers the elastic pin, will the elastic pin be forced to elastically contract and disengage from the knob and the screw rod. After the latching restriction between the knob and the screw rod is released, under the drive of the coil spring, the knob moves outwards, and the screw rod pushes inwards against the plunger to block the water, replacing the water stop pad to stop water. The threaded fit between the screw rod and the switch bracket can accurately and slowly control the process of the screw rod pushing against the plunger, without sudden collisions, improving the service life; if you want to reopen the water inlet, you can rotate the knob inwards to compress the coil spring again, and at the same time adjust the latching part of the knob and the limit of the spring plunger. The knob resets to the static state again, and the screw rod moves outwards to reopen the water passage surface, and the water inlet valve re-enters water.

[0023] 3. The present invention designs a brand-new internal waterway structure, which centrally arranges the water inlet channel and the water outlet channel at the same end of the water passage cavity, so that a water stop switch can be added to the other end of the water passage cavity. The water stop switch slides in the water passage cavity to control whether the water inlet channel and the water outlet channel are connected. Thus, when the water stop pad cannot block the water outlet end face of the water outlet channel, that is, when the water inlet valve fails, the water stop switch can block the water passage surface to block the connection between the water inlet channel and the water outlet channel, completing water stoppage, replacing the water stop pad to stop water; the structure of the present invention is simple and ingenious, and can be applied to most water inlet valves. In addition, the present invention also designs a clever water stop switch structure. When the water level is too high, the small floating cylinder can automatically drive the water stop switch to stop water through the magnetic structure. The magnetic structure has little wear, can extend the service life, and stably realizes the control of opening and stopping water.

[0024] 4. The water storage tank of the present invention is applied to the water inlet valve as a temporary water storage component for water replenishment. The water replenishment port of the water inlet valve can replenish water into the siphon cavity of the water storage tank, so that the water replenishment will not flow into the toilet water tank, that is, the water replenishment will not affect the water storage capacity of the toilet water tank, thus avoiding the problem of water overflow in the toilet water tank and saving water resources. In addition, a drainage siphon is provided in the siphon cavity, and at the same time, a water inlet bottom hole is also opened at the bottom of the siphon cavity, so that the siphon cavity can hold the water in the toilet water tank and the water for water replenishment. When the toilet water tank drains water, the difference in water pressure inside and outside the siphon tube causes the siphon tube to drain all the water in the siphon cavity each time, ensuring that water can be replenished again next time. The present invention rationally utilizes the structure of the water storage tank to realize the separation of water replenishment and the toilet water tank. The structure is compact and small, and can be applied to most water inlet valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the overall structural schematic diagram of the water inlet valve in the first embodiment of the present invention (the state diagram when the small floating cylinder disengages from the drive switch when the water level in the overflow cavity drops);

[0026] Figure 2Schematic diagram of the internal structure of the water inlet valve in the first embodiment of the present invention Figure 1 ;

[0027] Figure 3 Schematic diagram of the half-section decomposition structure of the first embodiment of the present invention;

[0028] Figure 4 is Figure 3 Enlarged view of part A in

[0029] Figure 5 Schematic diagram of the internal structure of the water inlet valve in the first embodiment of the present invention Figure 2 (State diagram of the magnetic attraction between the small float and the drive switch when the water level in the overflow chamber rises);

[0030] Figure 6 Schematic diagram of the internal structure of the siphon chamber in the first embodiment of the present invention;

[0031] Figure 7 Exploded view of the check valve in the first embodiment of the present invention;

[0032] Figure 8 Schematic diagram of the internal structure of the overflow chamber in the first embodiment of the present invention;

[0033] Figure 9 is Figure 8 Enlarged view of part B in

[0034] Figure 10 Schematic diagram of the internal structure of the water inlet pipe in the first embodiment of the present invention;

[0035] Figure 11 Schematic diagram of the internal structure of the water inlet pipe in the first embodiment of the present invention( Figure 13 Enlarged view of part C in

[0036] Figure 12 Exploded view of the first embodiment of the present invention;

[0037] Figure 13 Schematic diagram of the half-section decomposition structure of the first embodiment of the present invention;

[0038] Figure 14 Schematic diagram of the half-section three-dimensional structure of the first embodiment of the present invention;

[0039] Figure 15 Schematic diagram of the half-section front view structure of the first embodiment of the present invention;

[0040] Figure 16 is Figure 14 Enlarged view of part D in

[0041] Figure 17 is Figure 15 Enlarged view of part E in

[0042] Figure 18 It is a three-dimensional structural schematic diagram of the water inlet pipe in the first embodiment of the present invention;

[0043] Figure 19 It is a three-dimensional structural schematic diagram of the switch bracket in the first embodiment of the present invention;

[0044] Figure 20 It is a three-dimensional structural schematic diagram of the knob in the first embodiment of the present invention.

[0045] Label description:

[0046] 1. Water inlet pipe; 11. Water stop cavity; 12. Water receiving tray; 121. Annular flow channel; 122. Water outlet annular gap; 13. Water receiving hole; 14. Water inlet channel; 15. Water outlet channel; 151. Water outlet end face; 16. Water outlet pore; 17. Water passing cavity; 171. L-shaped bending section; 18. Water passing surface; 19. Installation opening; 191. Yielding opening; 192. Buckling interface; 2. Water stop switch; 21. Knob; 211. Clamping part; 22. Screw rod; 221. Tapered plug; 23. Switch bracket; 231. Pin hole; 232. Internal thread hole; 233. Installation column; 234. First O-ring; 235. Second O-ring; 236. Anti-siphon sheet; 237. Buckling convex ring; 24. Elastic pin; 25. Coil spring; 26. Plunger; 261. Central through hole; 262. Back pressure cavity; 27. Second magnet; 28. Water passing hole; 29. Water falling hole; 30. Water passing channel; 3. Water storage tank; 31. Siphon cavity; 311. Drainage port; 312. Drainage preset water level; 32. Overflow cavity; 321. Drainage end face; 322. Valve cavity; 323. One-way water outlet valve; 324. Valve rod; 325. Compression spring; 326. Valve cover; 327. Sealing gasket; 328. Annular flange; 329. Drainage micropore; 33. Overflow port; 331. Partition board; 34. Water collection area; 35. Water replenishing hole; 351. Floating cavity; 352. Floating body; 353. Communication hole; 36. Upper box body; 361. Insertion rod; 37. Lower box body; 38. Water inlet pipeline; 381. Water inlet bottom hole; 39. Counterweight block; 4. Drainage siphon; 5. Small floating cylinder; 51. Driving part; 52. First magnet; 53. Yielding groove; 6. Back pressure valve; 61. Pressure relief hole; 7. Large floating cylinder. Detailed implementation manners

[0047] The following will make a detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments.

[0048] Embodiment 1:

[0049] The present invention provides a leak-proof water inlet valve, as Figures 1 to 2As shown in the figure, it includes a water inlet pipe 1, a water stop switch 2, a water storage tank 3, a drainage siphon 4, a small float 5, a back pressure valve 6, a large float 7 and a magnetic attraction structure. In this embodiment, the back pressure valve 6 of the water inlet valve is taken as an example for introduction. The back pressure valve 6 is just one kind of water stop valve. In other embodiments, other water stop valves including a water stop pad can also be adopted.

[0050] Combined with Figure 11 , the water inlet pipe 1 is arranged in the water storage tank 3. A water stop cavity 11 and a water receiving tray 12 communicating with the water stop cavity 11 are provided at the top of the water inlet pipe 1. The water stop cavity 11 is for installing the back pressure valve 6. A water inlet 13 is opened in the water receiving tray 12. A pressure relief hole 61 is provided at the top of the back pressure valve 6. The pressure relief hole 61 is connected to the water inlet 13 through the water receiving tray 12.

[0051] As Figure 1 and Figure 2 shown, a siphon cavity 31 and an overflow cavity 32 are arranged side by side in the water storage tank 3. A water replenishing hole 35 is opened in the upper part of the siphon cavity 31. The water replenishing hole 35 is located below the water inlet 13. A water collecting area 34 is convexly provided on the surface of the water storage tank 3 below the water inlet 13. The water collecting area 34 is surrounded by a flange protruding from the top of the water storage tank 3. A water replenishing hole 35 communicating with the siphon cavity 31 is opened in the water collecting area 34.

[0052] In this way, the water flows out from the pressure relief hole 61 of the back pressure valve 6, then flows out from the water inlet 13, and then is collected through the water collecting area 34 and flows into the siphon cavity 31 from the water replenishing hole 35, realizing the water inlet of the siphon cavity 31.

[0053] As Figure 1 shown, since the water flowing out from the water inlet 13 has a certain range, in order to better collect the water flow of the water inlet 13 in the water collecting area 34, the area surrounded by the water collecting area 34 on the top of the water storage tank 3 is conical. The lower part of the water inlet 13 corresponds to the wide part of the cone. The wide part gradually converges to the narrow part where the water replenishing hole 35 is located. The wide part can cover all the water flows flowing from the water inlet 13 into the water collecting area 34, so that the water flowing out from the water inlet 13 can gather within a certain range and will not flow out. The narrow part can converge the water flow of the wide part to the water replenishing hole 35, enabling the water flow to rush into the siphon cavity 31. This structure can more stably control the water flow direction. Of course, the shape of the water collecting area 34 is not limited in this case. This embodiment only provides a relatively preferred one.

[0054] Combined with Figure 1 , Figure 3 , Figure 4 and Figure 5, Further, the water stop switch 2 is arranged below the water receiving tray 12. A water passing hole 28 is opened at the top of the water stop switch 2 below the corresponding water inlet 13, and a water falling hole 29 is opened at the bottom of the water stop switch 2 above the wide part of the water collecting area 34. A water passing channel 30 is arranged in the water stop switch 2 to connect the water passing hole 28 and the water falling hole 29. This structural design enables the water stop switch 2 to be used not only as a water stop component but also as a water passing component, saving the additional arrangement of pipelines and slowing down the falling speed of the water flow, achieving the effect of slow flow.

[0055] Combined with Figure 6 , a drain siphon 4 is arranged in the siphon chamber 31. The drain siphon 4 is in an inverted U shape. One end of the drain siphon 4 is connected to the drain port 311 at the bottom of the siphon chamber 31, and the other end of the drain siphon 4 is suspended above the bottom of the siphon chamber 31. The drain siphon 4 drains water according to the siphon principle. The drain siphon 4 is provided with a drain preset water level 312. In the normal state, when the water in the siphon chamber 31 reaches the drain preset water level 312, the drain siphon 4 drains the water in the siphon chamber 31 into the water tank, ensuring that the water in the siphon chamber 31 is also drained out every time the toilet water tank drains water; beside the siphon chamber 31 is the overflow chamber 32. In one embodiment, a partition 331 is arranged between the siphon chamber 31 and the overflow chamber 32, and an overflow port 33 is formed at the upper part of the partition 331. The height of the overflow port 33 is higher than the drain preset water level 312; when the water inlet valve leaks and continuously supplies water or the drain valve cannot drain water, the water level in the water tank is relatively high, the drain siphon 4 fails, and the back pressure valve 6 will continuously supply water. When the water level exceeds the height of the overflow port 33, it overflows from the siphon chamber 31 and then enters the overflow chamber 32; a small float 5 is arranged in the overflow chamber 32. A driving part 51 is arranged at the top of the small float 5, and the water stop switch 2 is arranged above the driving part 51. As Figure 5 shown, the small float 5 floats as the water level in the overflow chamber 32 rises, and the driving part 51 floats with the small float 5 to trigger the water stop switch 2 to block the water inlet, thereby realizing the water stop control when the water inlet valve leaks. The present invention rationally utilizes the structure of the water storage tank 3, arranges the overflow chamber 32 side by side on the basis of the siphon chamber 31, sets the water inlet 13 at the top, and utilizes the water supply characteristic of the back pressure valve 6 and the overflow mechanism of the overflow chamber 32 to trigger the water stop mechanism to realize water stop, with a compact and small structure.

[0056] Such as Figure 4As shown, a floating cavity 351 is formed by the concave of the water replenishing hole 35. A float 352 is arranged in the floating cavity 351. A communication hole 353 is opened at the bottom of the floating cavity 351. After the water replenishing hole 35 above the float 352 replenishes water into the floating cavity 351, the float 352 floats up but does not block the water replenishing hole 35, and at the same time the float 352 floats up to open the communication hole 353, so as to replenish water into the siphon cavity 31 through the communication hole 353. When the water in the siphon cavity 31 is full, the water level exceeds the height of the communication hole 353, and the communication hole 353 cannot continue to replenish water. The water replenishing hole 35 continues to replenish water, and the floating height of the float 352 is further increased. The upper end surface of the float 352 cooperates to block the water replenishing hole 35, so that the water replenishing hole 35 can no longer replenish water into the floating cavity 351.

[0057] As Figure 7 , Figure 8 and Figure 9 As shown, a drainage end face 321, a valve cavity 322 and a one-way water outlet valve 323 are arranged at the bottom of the overflow cavity 32. The one-way water outlet valve 323 includes a valve rod 324, a compression spring 325, a valve cover 326 and a sealing gasket 327. The valve cover 326 covers the bottom of the valve cavity 322 and the valve cover 326 is provided with a through hole and a drainage micropore 329. A valve rod 324, a compression spring 325 and a sealing gasket 327 are arranged in the valve cavity 322. An annular flange 328 is arranged in the middle section of the valve rod 324. The sealing gasket 327 and the compression spring 325 are sleeved on the valve rod 324. The sealing gasket 327 is located on the upper end face of the annular flange 328 and blocks the drainage end face 321. The compression spring 325 is located between the lower end face of the annular flange 328 and the valve cover 326. The through hole is for the lower section of the valve rod 324 to pass through. The upper section of the valve rod 324 extends into the overflow cavity 32, and a relief groove 52 is arranged at the bottom of the small float 5 corresponding to the upper section of the valve rod 324. When the water inlet valve returns to normal water inlet, there is water retained in the overflow cavity 32. At this time, manual drainage is required. The small float 5 can be pressed. The relief groove 52 at the bottom abuts against the valve rod 324. The valve rod 324 moves downwards, the compression spring 325 contracts, and the annular flange 328 separates from the drainage end face 321, so that the drainage end face 321 is opened to drain the water in the overflow cavity 32 into the water tank through the valve cavity 322 and the drainage micropore 329, realizing the drainage of the overflow cavity 32. After the water is drained, the pressing is released, and the elastic force of the compression spring 325 is released to drive the annular flange 328 to block the drainage end face 321 again. At this time, the water in the overflow cavity 32 is drained and the small float 5 descends. The small float 5 can be at the bottom of the overflow cavity 32 under the relief space of the relief groove 52.

[0058] As Figure 10As shown in the figure, the water storage tank 3 includes an upper box body 36 and a lower box body 37. A vertical water inlet pipe 38 is partitioned in the siphon chamber 31 of the lower box body 37. At the top position corresponding to the water inlet pipe 38, the upper box body 36 is provided with a plug rod 361. The upper box body 36 covers the lower box body 37, and the plug rod 361 is inserted and fitted into the water inlet pipe 38. A water inlet bottom hole 381 is opened at the bottom of the water inlet pipe 38. The drain port 311 and the water inlet bottom hole 381 are communicated with the toilet water tank. A counterweight 39 is arranged in the water inlet pipe 38, and the counterweight 39 seals the water inlet bottom hole 381. The water in the toilet water tank flushes open the counterweight 39, enters the water inlet pipe 38 through the water inlet bottom hole 381, and then enters the siphon chamber 31 from the water inlet pipe 38; the height of the drain port 311 at the bottom of the siphon chamber 31 is higher than that of the water inlet bottom hole 381. When the toilet water tank drains water, the counterweight 39 seals the water inlet bottom hole 381 to prevent water from flowing out of the water inlet pipe 38, acting as a check valve; the water replenishing hole 35 replenishes water into the siphon chamber 31 at the same time. When the water level reaches the preset drain water level 312, the drain siphon 4 is triggered to drain water, and all the water in the siphon chamber 31 is drained into the toilet water tank to store water for the toilet water tank.

[0059] As Figure 4 and Figure 11 shown in the figure, an inlet channel 14 and an outlet channel 15 are provided inside the water inlet pipe 1. A water stop chamber 11 is arranged in the outlet channel 15. An outlet end face 151 is formed in the water stop chamber 11. An outlet pore 16 is opened on the outlet end face 151. A back pressure valve 6 is arranged in the water stop chamber 11 to control the opening or blocking of the outlet pore 16 by the back pressure pad. Combined Figure 10 with this, the back pressure valve 6 is connected to the large floating cylinder 7, and the back pressure valve 6 moves up and down with the large floating cylinder 7. In this embodiment, the working principle of the back pressure valve 6 is the same as that of the existing back pressure valve 6, and will not be elaborated in this case.

[0060] When the back pressure valve 6 fails, the back pressure valve 6 cannot block the outlet end face, resulting in continuous water outflow from the outlet end face and continuous water inflow of the inlet valve. Therefore, this embodiment provides a magnetically controlled water stop switch 2, which can block the water inlet through the water stop switch 2 without using the back pressure valve 6 to stop water.

[0061] The inlet channel 14 admits water from bottom to top. A water passing chamber 17 is provided on the side between the inlet channel 14 and the outlet end face 151. One end of the water passing chamber 17 is a water passing surface 18 for the inlet channel 14 to pass water to the outlet channel 15, and the other end is provided with an installation opening 19 for installing the water stop switch 2.

[0062] As Figure 12 , Figure 13 , Figure 18 and Figure 19As shown, the water stop switch 2 includes a knob 21, a screw rod 22, a switch bracket 23, an elastic dowel pin 24, a coil spring 25, and a plunger 26; the switch bracket 23 is installed in the installation opening 17. A pin hole 231 is provided on one side of the switch bracket 23, and the elastic dowel pin 24 is built in the pin hole 231. Combining Figure 20 , a clamping portion 211 is provided on the side of the knob 21 for the elastic dowel pin 24 to movably clamp. The initial state of the elastic dowel pin 24 is to be clamped with the clamping portion 211. The knob 21 is rotatably installed on the switch bracket 23. The coil spring 25 is set between the knob 21 and the switch bracket 23 with a compressed initial state. An internal threaded hole 232 is axially provided at the center of the switch bracket 23. The rod body of the screw rod 22 is provided with an external thread, and the screw rod 22 is cooperatively inserted into the internal threaded hole 232. The outer end of the screw rod 22 is slidably sleeved with the knob 21 and is circumferentially limited with the knob 21. The knob 21 axially slides relative to the switch bracket 23, and the sliding direction of the knob 21 is opposite to the moving direction of the screw rod 22. A plunger 26 is provided at the inner end of the screw rod 22, and the screw rod 22 movably pushes against the plunger 26 to open or block the water passing surface 18; the plunger 26 is preferably made of rubber material, and the rubber has a certain elastic deformation force, which can withstand the pushing of the screw rod 22 and can also reset and return to its original shape.

[0063] In this preferred embodiment, the elastic dowel pin 24 is triggered to move by means of magnetic force and buoyancy. As Figure 2 shown, the small floating cylinder 5 is arranged in the overflow cavity 32 and is located below the side of the elastic dowel pin 24. A driving portion 51 is provided at the top of the small floating cylinder 5. The small floating cylinder 5 floats up and down as the water volume in the water tank rises and falls. The driving portion 51 cooperates with the elastic dowel pin 24 to make the elastic dowel pin 24 disengage from the clamping portion 211. Moreover, a first magnet 52 is provided on the driving portion 51 of the small floating cylinder 5, and a second magnet 27 is provided on the outer side of the elastic dowel pin 24 or the elastic dowel pin 24 itself is a magnetic conductor. When the first magnet 52 magnetically attracts the second magnet 27, the elastic dowel pin 24 contracts and disengages from the clamping portion 211. When the first magnet 52 disengages from the second magnet 27, the elastic dowel pin 24 resets.

[0064] Based on the above scheme, when the back pressure valve 6 fails, the water stop working process of the water stop switch 2 in this preferred embodiment is as follows:

[0065] First, the initial state of the elastic pin 24 is engaged with the engaging portion 211, and the initial state of the coil spring 25 is compressed. When the water inlet valve continuously fills water into the water tank, the small float 5 rises with the buoyancy and drives the driving portion 51 to move upward close to the elastic pin 24. The first magnet 52 on the driving portion 51 attracts the second magnet 27 of the elastic pin 24. The elastic pin 24 contracts and disengages from the engaging portion 211 outward. Then, since the limit of the elastic pin 24 is released, the knob 21 moves outward under the stretching action of the coil spring 25, and at the same time drives the screw rod 22 to move inward (because the moving direction of the screw rod 22 is opposite to the moving direction of the knob 21, and the moving direction of the screw rod 22 is determined by the helix direction designed by the internal thread hole 232). Finally, the screw rod 22 pushes against the plunger 26 to block the water passing surface 18, and no water passes between the water inlet channel 14 and the water outlet channel 15, and the water inlet valve stops filling water.

[0066] When the back pressure valve 6 can stop water normally, the water level drops, and at this time, the water stop switch 2 can be reset. The reset process is as follows:

[0067] While rotating the knob 21, press the knob 21 at the same time. The coil spring 25 is converted from the stretched state to the compressed state. When compressed to a certain volume, since the small float 5 drops with the buoyancy and drives the driving portion 51 to move downward away from the elastic pin 24, the first magnet 52 on the driving portion 51 moves away from the second magnet 27 of the elastic pin 24. The elastic pin 24 resets inward and engages with the engaging portion 211 of the knob 21. At this time, the knob 21 is restricted and cannot rotate. During the process of pressing the knob 21, it moves inward and at the same time drives the screw rod 22 to move outward. The screw rod 22 releases the pushing against the plunger 26, the water passing surface 18 is opened, and water passes between the water inlet channel 14 and the water outlet channel 15, and the water inlet valve can fill water normally.

[0068] Such as Figure 17 and Figure 19As shown, the switch bracket 23 of the present invention is an important component for installing the water stop switch 2 on the water inlet pipe 1. An installation post 233 is provided at the middle axis of the switch bracket 23, and an internal thread hole 232 is provided inside the installation post 233. A screw rod 22 is in threaded fit with the internal thread hole 232, and a first O-ring 234 is arranged between the screw rod 22 and the internal thread hole 232 to ensure that the internal thread hole 232 does not leak water. The inner end of the installation post 233 is inserted into the water passing cavity 17 through the installation port 17 in a mating manner, and a second O-ring 235 is sleeved at the insertion position to ensure the airtightness of the water passing cavity 17 and prevent water from flowing out of the installation port 17. A tapered plug 221 is formed in the middle of the end of the screw rod 22. A central through hole 261 is provided at the position of the plunger 26 corresponding to the tapered plug 221. When the screw rod 22 is movably pushed against the plunger 26, the tapered plug 261 is hermetically inserted into the central through hole 261, so that a back pressure cavity 262 is formed on the back of the plunger 26 by the internal thread hole 232. The design of this back pressure cavity 262 can form a huge pressure on the back of the plunger 26, enabling the plunger 26 to block the water passing surface 16 more powerfully. In addition, a coil spring 25 is sleeved on the outer end of the installation post 233. One end of the coil spring 25 abuts against the knob 21, and the other end of the coil spring 25 abuts against the switch bracket 23. In this way, most of the components of the water stop switch 2 can be installed on the water inlet pipe 1 through the switch bracket 23. A siphon prevention sheet 236 is also sleeved on the inner end of the installation post 233. As Figure 16 , Figure 18 and Figure 19 shown, a buckling convex ring 237 is formed at the edge of the switch bracket 23, and a buckling interface 192 is formed at the position of the water inlet pipe 1 corresponding to the buckling convex ring 237. The switch bracket 23 is buckled on the buckling interface 192 of the water inlet pipe 1 through the buckling convex ring 237. The buckling interface 192 protrudes from the water inlet pipe 1 relative to the installation port 17, so that an annular flow channel 121 communicating with the water outlet pore 16 is formed between the water inlet pipe 1 and the buckled switch bracket 23. An outlet annular gap 122 is formed on the outer circumference of the water inlet channel 14 of the water inlet pipe 1. Thus, after the water flow enters the water outlet channel 15 from the water passing surface 18, it completes the water outlet through the water outlet end face 151, the water outlet pore 16, the annular flow channel 121, and the outlet annular gap 122.

[0069] Further refining the structures of the water inlet channel 14 and the water outlet channel 15, as Figure 11 shown, the water inlet channel 14 is vertically arranged inside the water inlet pipe 1, the water passing cavity 17 is horizontally arranged inside the water inlet pipe 1, the water inlet channel 14 is bent and communicated with one end of the water passing cavity 17. An L-shaped bending section 171 is provided at one end of the water passing cavity 17, and the water passing surface 18 is formed on the L-shaped bending section 171. The water passing cavity 17 is communicated with the water outlet end face 151 through the L-shaped bending pipe section 171. The L-shaped bending section 151 blocks between the water outlet end face 151 and the water inlet channel 14.

[0070] As Figure 1 and Figure 12As shown, an open relief opening 191 is formed in the water inlet pipe 1 at the positions of the knob 21 and the elastic dowel pin 24. Users can operate the reset of the knob 21 from the relief opening 191. Moreover, the small float 5 can also cooperate with the elastic dowel pin 24 through the relief opening 191.

[0071] After the water level drops, the driving part 51 of the small float 5 disengages from the knob 21. The above solution does not limit how the small float 5 re-opens the water inlet after the water level drops. This case does not make any restrictions. In this preferred embodiment, the knob 21 is manually driven to reset. The plunger 26 re-opens the water passage cavity 18 under the action of water flow, and water passes between the water inlet passage 14 and the water outlet passage 15, realizing the re-inflow of water into the water inlet valve.

[0072] The above are only the preferred embodiments of the present invention, and do not limit the design of this case. All equivalent changes made according to the key design of this case fall within the protection scope of this case.

Claims

1. A leak-proof water inlet valve, characterized in that: it includes a water inlet pipe, a water storage tank, a water stop valve, a water stop switch, a small float, a drainage siphon and a magnetic attraction structure; the water storage tank is penetrated by a water inlet pipe for supplying water to the toilet tank. A water stop cavity and a water receiving tray communicating with the water stop cavity are provided at the top of the water inlet pipe. The water stop cavity is for installing the water stop valve. The water receiving tray is provided with the water receiving port. A pressure relief hole is provided at the top of the water stop valve, and the pressure relief hole is connected to the water receiving port through the water receiving tray; a siphon cavity and an overflow cavity are arranged side by side in the water storage tank, and an overflow port is provided between the siphon cavity and the overflow cavity; a water replenishing hole is opened in the upper part of the siphon cavity, the water replenishing hole is located below the water receiving port, a drainage port is opened at the bottom of the siphon cavity, and the drainage port communicates with the toilet tank; a drainage siphon is arranged in the siphon cavity, one end of the drainage siphon is connected to the drainage port, and the other end of the drainage siphon is suspended at the bottom of the siphon cavity; an inlet channel and an outlet channel are provided in the water inlet pipe, the water stop cavity is arranged in the outlet channel, a water passing cavity is provided between the inlet channel and the outlet channel, one end of the water passing cavity is a water passing surface for the inlet channel to pass water to the outlet channel, and the other end is provided with an installation opening; a water stop switch is installed at the installation opening, and the water stop switch includes a knob, a screw rod, a switch bracket, an elastic pin, a coil spring, and a plunger; the switch bracket is installed at the installation opening. An internal threaded hole is provided axially at the center of the switch bracket. The rod body of the screw rod is provided with an external thread, and the screw rod is cooperatively inserted into the internal threaded hole. The outer end of the screw rod is slidably sleeved with the knob and circumferentially limited with the knob. The knob slides axially relative to the switch bracket, and the sliding direction of the knob is opposite to the moving direction of the screw rod. The inner end of the screw rod is provided with a plunger, and the screw rod movably pushes against the plunger to open or block the water passing surface. The coil spring is arranged between the knob and the switch bracket with a compressed initial state. A pin hole is opened on one side of the switch bracket, and an elastic pin is arranged in the pin hole. A clamping portion is provided on the side of the knob for the elastic pin to be clamped; a small float is arranged in the overflow cavity, a driving portion is provided at the top of the small float, and a water stop switch is arranged above the driving portion; a magnetic attraction structure is provided between the driving portion and the elastic pin. The driving portion moves up and down with the small float and magnetically attracts the elastic pin. When the driving portion magnetically attracts the elastic pin, the screw rod pushes against the plunger to block the water passing surface.

2. A leak-proof water inlet valve according to claim 1, characterized in that: the switch bracket is provided with an installation post, an internal threaded hole is provided inside the installation post, the inner end of the installation post is cooperatively inserted into the water passing cavity from the installation opening, the outer end of the installation post is sleeved with a coil spring, one end of the coil spring abuts against the knob, and the other end of the coil spring abuts against the switch bracket.

3. A leak-proof water inlet valve according to claim 2, characterized in that: a first O-ring is arranged between the screw rod and the internal threaded hole, a second O-ring is sleeved at the insertion part of the inner end of the installation post and the water passing cavity, a conical plug is formed in the middle of the end of the screw rod, a central through hole is opened at the position of the plunger corresponding to the conical plug, and when the screw rod movably pushes against the plunger, the conical plug is hermetically inserted into the central through hole, so that a back pressure cavity is formed at the back of the plunger in the internal threaded hole.

4. A leak-proof water inlet valve according to claim 1, characterized in that: The magnetic attraction structure includes a first magnet and a second magnet. The driving part of the small float is located below the side of the elastic pin. The second magnet is arranged on the outer side of the elastic pin. The driving part is provided with a magnetic attraction second magnet to make the elastic pin slide and shrink and disengage from the first magnet of the clamping part.

5. A leak-proof water inlet valve as claimed in claim 1, Features: A water collection area is convexly arranged on the surface of the water storage tank below the water replenishment hole. The water collection area is surrounded by a retaining edge protruding from the top of the water storage tank. A water collection hole connected to the siphon cavity is arranged in the water collection area.

6. A leak-proof water inlet valve as claimed in claim 5, Features: The water collection area is conical in the area enclosed at the top of the water storage tank, and the lower part of the water replenishment hole corresponds to the wide part of the cone, and the wide part gradually converges to the narrow part where the water collection hole is located.

7. A leak-proof water inlet valve as claimed in claim 5, Features: The water collecting hole is concave to form a float cavity, a float is arranged in the float cavity, a communicating hole is arranged at the bottom of the float cavity, and the upper end surface of the float is used for movably blocking the water collecting hole.

8. A leak-proof water inlet valve as claimed in claim 1, Features: The water stop switch is arranged below the water receiving tray, a water through hole is opened at the top of the water stop switch below the corresponding water replenishment hole, a drain hole is opened at the bottom of the water stop switch above the wide part of the water collection area, and a water passage is arranged in the water stop switch for connecting the water through hole and the drain hole.

9. A leak-proof water inlet valve as claimed in claim 1, Features: The bottom of the overflow chamber is provided with a drainage end face, a valve chamber and a one-way water outlet valve. The one-way water outlet valve includes a valve stem, a compression spring, a valve cover and a sealing gasket. The valve cover is covered on the bottom of the valve chamber and has a through hole and a drainage microhole. The valve stem, compression spring and sealing gasket are arranged in the valve chamber. The middle section of the valve stem is provided with an annular flange. The sealing gasket and the compression spring are sleeved on the valve stem. The sealing gasket is located on the upper end face of the annular flange and blocks the drainage end face. The compression spring is located between the lower end face of the annular flange and the valve cover. The through hole is provided for the lower section of the valve stem to pass through, and the upper section of the valve stem extends into the overflow chamber, and the bottom of the small float is provided with a yield groove corresponding to the upper section of the valve stem.

10. A leak-proof water inlet valve as claimed in claim 1, Features: A partition is arranged between the siphon cavity and the overflow cavity, and an overflow port is formed on the upper part of the partition.

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