Closestool flushing valve and closestool

Abstract

The utility model relates to a closestool flushing valve and a closestool, and provides the closestool flushing valve which comprises a valve body shell, a valve body upper cover covering the valve body shell and a back pressure control cover arranged at the upper end of the valve body upper cover, and a valve plate is clamped between the valve body shell and the valve body upper cover; the valve body shell is provided with a water inlet cavity and at least one water outlet cavity, the valve plate is provided with a through hole and a pressurizing hole, the valve body upper cover is provided with a pressure relief channel and a pressure relief hole which are communicated with the water outlet cavities, the valve plate and the valve body upper cover are sealed to form a back pressure cavity, and the pressurizing hole is communicated with the back pressure cavity and the water inlet cavity; the pressure relief valve further comprises a valve rod, one end of the valve rod can move between the position where the pressure relief channel is plugged and the position where the pressure relief channel is opened, and when the valve rod is located at the plugged position, the water pressure of the backpressure cavity enables the valve plate to close the water outlet cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of bathrooms, in particular to a toilet flushing valve and a toilet. Background Art

[0002] With modern homes increasingly demanding sanitary ware, the performance of toilet flush valves has become a key indicator of toilet quality. Toilet flush valves currently on the market are primarily divided into two types: pulse solenoid valves and mechanical flush valves. Pulse solenoid valves are favored for their rapid response and precise control, but the two solenoid coils in a pulse solenoid valve are a major component of its cost, making it relatively expensive. Mechanical flush valves, on the other hand, are widely used due to their simple structure and low cost. However, they have a higher probability of failure. For example, components such as the valve disc and valve seat may wear, corrode, or become clogged over time, resulting in malfunction. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a toilet flush valve and a toilet to solve the problems mentioned in the above background technology section.

[0004] The utility model is achieved through the following technical solutions:

[0005] A toilet flush valve comprises a valve body shell, a valve body cover covering the valve body shell, and a back pressure control cover arranged at the upper end of the valve body cover, a valve plate is sandwiched between the valve body shell and the valve body cover; the valve body shell is provided with a water inlet chamber and at least one water outlet chamber, the valve plate is provided with a through hole and a pressure charging hole, the valve body cover is provided with a pressure relief channel and a pressure relief hole connected with the water outlet chamber, the valve plate and the valve body cover are sealed to form a back pressure chamber, and the pressure charging hole connects the back pressure chamber and the water inlet chamber; it also includes a valve stem, one end of the valve stem can move between the position of blocking and opening the pressure relief channel, when the valve stem is in the blocking position, the water pressure in the back pressure chamber will cause the valve plate to close the water outlet chamber.

[0006] Furthermore, a spring is provided on the outer periphery of the valve stem, and the spring is used to keep the valve stem blocking the pressure relief channel.

[0007] Furthermore, the valve plate is provided with a deformation portion, and the upper end surface of the water outlet chamber constitutes a water stop surface. Through the deformation of the deformation portion, the lower end surface of the valve plate can move between the position of supporting and separating from the water stop surface.

[0008] Furthermore, it also includes a driver fixed to the back pressure control cover, and a driving rod embedded in the back pressure control cover, the other end of the driving rod is connected to the valve stem, and the driver drives the driving rod to drive the driving rod to drive the valve stem to move up and down, so that one end of the valve stem can move between the position of blocking and opening the pressure relief channel.

[0009] Furthermore, the valve body shell is provided with two water outlet chambers and two corresponding driving rods, and the output end of the driver can selectively drive one of the driving rods to move up and down.

[0010] Furthermore, the valve body upper cover is provided with a conduit inserted into the water outlet chamber, the hollow portion of the conduit constitutes the pressure relief channel, and the conduit is sealed against the through hole.

[0011] Furthermore, the valve stem sleeve is provided with a sealing gasket, and the valve stem abuts against the pressure relief channel through the sealing gasket.

[0012] Furthermore, the pressure relief channel is provided with a raised surface protruding from the upper end surface of the pressure relief hole, and the valve stem blocks the pressure relief channel by supporting the raised surface.

[0013] Furthermore, the back pressure control cover is provided with a stepped hole for installing the valve stem, and also includes a retaining ring covering the stepped hole. A first sealing ring is provided in the stepped hole, and the first sealing ring seals against the valve stem.

[0014] On the other hand, the present invention provides a toilet comprising any one of the above-mentioned toilet flush valves.

[0015] The beneficial effects of this utility model are as follows: through the design of the back-pressure chamber, this utility model can effectively utilize water pressure to control the closure of the valve disc, reducing unnecessary liquid waste and achieving water conservation. The back-pressure chamber design also helps to reduce the noise generated by the sudden release of water pressure, making the toilet flushing process quieter. Through the coordinated use of the driver and valve stem, the liquid pressure relief can be precisely controlled, thereby achieving precise adjustment of the toilet flushing force, improving flushing efficiency, and reducing the probability of flush valve failure due to mechanical failure. The various components are designed to be separated, and if the valve stem or valve disc is damaged, it can be removed and replaced separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a toilet flush valve.

[0017] Figure 2 An exploded view of a toilet flush valve.

[0018] Figure 3 A perspective view of the back pressure control cover.

[0019] Figure 4 It is a three-dimensional view of the valve body cover.

[0020] Figure 5 It is a three-dimensional diagram of the valve plate.

[0021] Figure 6 It is a partial cross-sectional view of the first embodiment of the toilet flush valve.

[0022] Figure 7 It is a partial cross-sectional view of the second embodiment of the toilet flush valve.

[0023] Figure 8 This is a cross-sectional view of the toilet flush valve water outlet chamber and the water outlet chamber in a blocked state.

[0024] Figure 9 This is a cross-sectional view of the toilet flush valve water outlet chamber and the water outlet chamber in a connected state.

[0025] Figure 10 A three-dimensional cutaway diagram of the toilet and toilet flush valve assembly.

[0026] The above drawings include the following reference numerals:

[0027] 1. Valve body shell; 11. Water inlet chamber; 12. Water outlet chamber; 121. Water stop surface; 2. Valve body upper cover; 21. Conduit; 211. Pressure relief channel; 212. Raised surface; 22. Pressure relief hole; 23. Second sealing ring; 3. Back pressure control cover; 31. Step hole; 32. Retaining ring; 33. First sealing ring; 34. Mounting groove; 4. Valve plate; 41. Through hole; 42. Pressurization hole; 43. Narrowing part; 44. Deformation part; 45. Supporting layer; 46. Rubber layer; 5. Back pressure chamber; 6. Driver; 61. Gear; 611. Partial tooth; 62. Support plate part; 7. Drive rod; 71. Rack part; 72. Pin shaft; 73. Force shaft; 8. Valve stem; 81. Spring; 82. Sealing gasket; 9. Toilet; 91. Upward flush pipe; 92. Downward flush pipe. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] Reference Figures 1 to 10As shown, a toilet flush valve includes a valve body shell 1, a valve body cover 2 covering the valve body shell 1, and a back pressure control cover 3 arranged at the upper end of the valve body cover 2, a valve plate 4 is sandwiched between the valve body shell 1 and the valve body cover 2; the valve body shell 1 is provided with a water inlet chamber 11 and at least one water outlet chamber 12, the valve plate 4 is provided with a through hole 41 and a charging hole 42, the valve body cover 2 is provided with a pressure relief channel 211 and a pressure relief hole 22 connected with the water outlet chamber 12, the valve plate 4 and the valve body cover 2 are sealed to form a back pressure chamber 5, the charging hole 42 connects the back pressure chamber 5 and the water inlet chamber 11; it also includes a valve stem 8, one end of the valve stem 8 can move between the position of blocking and opening the pressure relief channel 211, when the valve stem 8 is in the blocking position, the water pressure in the back pressure chamber 5 will cause the valve plate 4 to close the water outlet chamber 12.

[0030] The utility model, through the design of the back-pressure chamber 5, can effectively utilize water pressure to control the closure of the valve disc 4, reducing unnecessary liquid waste and achieving a water-saving effect. The design of the back-pressure chamber 5 also helps to reduce the noise generated by the sudden release of water pressure, making the flushing process of the toilet 9 quieter. Through the coordinated use of the valve stem 8 and the valve disc 4 and other structures, the pressure relief of the liquid can be precisely controlled, thereby achieving precise adjustment of the flushing force of the toilet 9, improving the flushing efficiency, and reducing the probability of flush valve failure due to mechanical failure. The various components are designed to be separated, and if the valve stem 8 or valve disc 4 are damaged, they can be removed and replaced separately.

[0031] The back pressure control cover 3 is provided with a stepped hole 31 for installing the valve stem 8. The valve stem 8 moves up and down along the stepped hole 31. It also includes a retaining ring 32 covering the stepped hole 31. A first sealing ring 33 is provided in the stepped hole 31. The first sealing ring 33 seals against the valve stem 8. The first sealing ring 33 is clamped between the retaining ring 32 and the back pressure control cover 3 to prevent liquid from leaking from this position.

[0032] A spring 81 is sleeved on the outer periphery of the valve stem 8 . The spring 81 is disposed in the step hole 31 . The spring 81 is used to keep the valve stem 8 blocking the pressure relief channel 211 .

[0033] The valve stem 8 is sleeved with a sealing gasket 82, and the valve stem 8 abuts the pressure relief channel 211 through the sealing gasket 82. Specifically, the pressure relief channel 211 is provided with a raised surface 212 protruding from the upper end surface of the pressure relief hole 22, and the sealing gasket 82 of the valve stem 8 blocks the pressure relief channel 211 by supporting the raised surface 212.

[0034] The sealing gasket 82 is preferably made of rubber to ensure the sealing effect of the pressure relief channel 211.

[0035] There are multiple pressure relief holes 22 , which are arranged in a circular array around the pressure relief channel 211 to increase the flow rate of the liquid.

[0036] It also includes a driver 6 fixed to the back pressure control cover 3, and a driving rod 7 embedded in the back pressure control cover 3, the other end of the driving rod 7 is connected to the valve stem 8, the driver 6 drives the driving rod 7, so that the driving rod 7 drives the valve stem 8 to move up and down, so that one end of the valve stem 8 can move between the position of blocking and opening the pressure relief channel 211.

[0037] The valve body shell 1 is provided with two water outlet chambers 12 and two corresponding driving rods 7 . The output end of the driver 6 can selectively drive one of the driving rods 7 to move up and down.

[0038] Reference Figure 2 、 Figure 6 、 Figure 8 and Figure 9 The figure shows a first embodiment of the present invention in which a driver 6 provided by the present invention drives a drive rod 7 to move up and down by rotation. Specifically, the output end of the driver 6 is provided with a gear 61 having a partial tooth 611. The drive rod 7 is provided with a rack portion 71. The driver 6 drives the gear 61 to rotate, causing the partial tooth 611 to selectively engage with the rack portion 71 of the drive rod 7, thereby selecting one of the water outlet chambers 12 for water discharge. The two water outlet chambers 12 are respectively connected to the upper flush pipe 91 and the lower flush pipe 92 of the toilet 9.

[0039] Reference Figure 7 The figure shows a second embodiment of the present invention in which the driver 6 provided by the present invention drives the driving rod 7 to move up and down by rotation. Specifically, the output end of the driver 6 is provided with two supporting plates 62, and the driving rod 7 is provided with a force-bearing shaft 73. By rotating the driver 6, the supporting plates 62 are lifted by the force-bearing shaft 73, thereby selecting any water outlet chamber 12 for water discharge. The two water outlet chambers 12 are respectively connected to the upper flush pipe 91 and the lower flush pipe 92 of the toilet 9.

[0040] The driver 6 can be electrically controlled or manually controlled. The electrically controlled method is to drive the gear 61 or the support plate 62 through a motor to rotate clockwise or counterclockwise, thereby driving the left or right driving rod 7 to move up and down; the manually controlled method is to set a knob, manual wrench, etc. extending out of the back pressure control cover 3, and drive the gear 61 or the support plate 62 through the knob or manual wrench to rotate clockwise or counterclockwise, thereby driving the left or right driving rod 7 to move up and down.

[0041] The back pressure control cover 3 is provided with a mounting groove 34 for mounting the driving rod 7 and the gear 61 , and the driving rod 7 moves up and down along the mounting groove 34 .

[0042] The valve body upper cover 2 is provided with a conduit 21 inserted into the water outlet chamber 12 . The hollow portion of the conduit 21 constitutes the pressure relief channel 211 . The conduit 21 seals against the through hole 41 of the valve plate 4 .

[0043] The valve plate 4 includes a supporting layer 45 and a rubber layer 46 arranged outside the supporting layer 45. The rubber layer 46 is provided with the through hole 41. The through hole 41 is provided with a constricted portion 43 abutting the conduit 21. The constricted portion 43 ensures that the conduit 21 is sealed against the valve plate 4.

[0044] The valve plate 4 is provided with a deformation portion 44 , and the upper end surface of the water outlet chamber 12 constitutes a water stop surface 121 . Through the deformation of the deformation portion 44 , the lower end surface of the valve plate 4 can move between the position of supporting and separating from the water stop surface 121 .

[0045] The valve stem 8 is provided with an assembly hole, and the drive rod 7 is provided with a pin shaft 72 passing through the assembly hole. Through this structure, the driving rod 7 is lifted and lowered, thereby driving the valve stem 8 to move up and down.

[0046] The valve body further includes a second sealing ring 23 , which seals against the back pressure control cover 3 and the valve body upper cover 2 , thereby preventing liquid from leaking from this position.

[0047] Reference Figure 8 As shown, when the water inlet chamber 11 and the water outlet chamber 12 are in a blocked state, the liquid in the water inlet chamber 11 enters the back pressure chamber 5 through the through hole 41 of the valve plate 4. At this time, the rubber layer 46 of the valve stem 8 abuts against the convex surface 212 of the pressure relief channel 211, and the liquid in the back pressure chamber 5 causes the lower end surface of the valve plate 4 to abut against the water stop surface 121 of the water outlet chamber 12, thereby disconnecting the water outlet chamber 12 and the water outlet chamber 12.

[0048] Reference Figure 9 As shown, when the water inlet chamber 11 and the water outlet chamber 12 are in a connected state, the drive rod 7 is driven to rise by the driver 6, and the drive rod 7 drives the valve stem 8 to rise, so that the rubber layer 46 of the valve stem 8 is separated from the convex surface 212 of the pressure relief channel 211, and the liquid in the back pressure chamber 5 enters the pressure relief channel 211 through the pressure relief hole 22, and then enters the water outlet chamber 12. At this time, the back pressure chamber 5 is depressurized, and then the deformation part 44 of the valve plate 4 is deformed by the action of water pressure, so that the lower end face of the valve plate 4 is separated from the water stop surface 121 of the water outlet chamber 12. At this time, the liquid in the water inlet chamber 11 turns over the water stop surface 121 and enters the water outlet chamber 12.

[0049] Reference Figure 10As shown, on the other hand, the present invention provides a toilet 9, which is provided with an upper flush pipe 91 and a lower flush pipe 92, and the upper flush pipe 91 and the lower flush pipe 92 are respectively connected to the two water outlet chambers 12 of the flushing valve, and the upper flush pipe 91 or the lower flush pipe 92 is selected to discharge water through the driver 6.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0051] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, the terms "first" and "second" may explicitly or implicitly include one or more of the features.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A toilet flush valve, characterized by: It comprises a valve body shell (1), a valve body upper cover (2) covering the valve body shell (1), and a back pressure control cover (3) arranged at the upper end of the valve body upper cover (2), and a valve plate (4) is sandwiched between the valve body shell (1) and the valve body upper cover (2); The valve body shell (1) is provided with a water inlet chamber (11) and at least one water outlet chamber (12); the valve plate (4) is provided with a through hole (41) and a pressure-charging hole (42); the valve body upper cover (2) is provided with a pressure relief channel (211) and a pressure relief hole (22) communicating with the water outlet chamber (12); the valve plate (4) and the valve body upper cover (2) are sealed to form a back pressure chamber (5); the pressure-charging hole (42) communicates with the back pressure chamber (5) and the water inlet chamber (11); It also includes a valve stem (8), one end of which can move between a position of blocking and opening the pressure relief channel (211). When the valve stem (8) is in the blocking position, the water pressure in the back pressure chamber (5) causes the valve plate (4) to close the water outlet chamber (12).

2. A toilet flush valve according to claim 1, characterized in that: The outer periphery of the valve stem (8) is sleeved with a spring (81), and the spring (81) is used to keep the valve stem (8) blocking the pressure relief channel (211).

3. A toilet flush valve according to claim 1, characterized in that: The valve plate (4) is provided with a deformation portion (44), and the upper end surface of the water outlet chamber (12) constitutes a water stop surface (121). Through the deformation of the deformation portion (44), the lower end surface of the valve plate (4) can move between a position supporting and a position away from the water stop surface (121).

4. A toilet flush valve according to claim 1, characterized in that: The invention also includes a driver (6) fixed to the back pressure control cover (3), and a driving rod (7) embedded in the back pressure control cover (3), the other end of the driving rod (7) is connected to the valve stem (8), and the driver (6) drives the driving rod (7) so that the driving rod (7) drives the valve stem (8) to move up and down, so that one end of the valve stem (8) can move between the position of blocking and opening the pressure relief channel (211).

5. A toilet flush valve according to claim 4, characterized in that: The valve body shell (1) is provided with two water outlet chambers (12) and two corresponding driving rods (7), and the output end of the driver (6) can selectively drive one of the driving rods (7) to move up and down.

6. A toilet flush valve according to claim 1, characterized in that: The valve body upper cover (2) is provided with a conduit (21) inserted into the water outlet chamber (12), the hollow portion of the conduit (21) forming the pressure relief channel (211), and the conduit (21) is sealed against the through hole (41).

7. A toilet flush valve according to claim 1, characterized in that: The valve stem (8) is sleeved with a sealing gasket (82), and the valve stem (8) abuts against the pressure relief channel (211) through the sealing gasket (82).

8. The toilet flush valve according to claim 1, characterized in that: The pressure relief channel (211) is provided with a raised surface (212) protruding from the upper end surface of the pressure relief hole (22), and the valve stem (8) blocks the pressure relief channel (211) by supporting the raised surface (212).

9. A toilet flush valve according to claim 1, characterized in that: The back pressure control cover (3) is provided with a stepped hole (31) for installing the valve stem (8), and also includes a retaining ring (32) covering the stepped hole (31). A first sealing ring (33) is provided in the stepped hole (31), and the first sealing ring (33) seals against the valve stem (8).

10. A toilet, characterized in that: The invention comprises a toilet flush valve according to any one of claims 1 to 9.

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