Water inlet valve capable of preventing siphon water return

Abstract

A water inlet valve capable of preventing siphon water return comprises a valve body, a movable valve element, a sealing piece, a valve cover, a water inlet pipe, a buoy, a screw rod, air seal colloidal particles and a water inlet lever, the valve body comprises a water outlet connector pipe, a water inlet connector pipe, a valve cavity and a valve element base, a core body part is embedded into a core body cavity part, a guide column extends out of the core body cavity part, and a core body cavity part end plate at a mounting hole is embedded into an annular clamping groove; the annular seat plate is attached to a bottom plate of the counter bore, the valve cover is inserted into the valve cavity and tightly presses the annular seat plate, the inserting opening part is inserted into the opening cavity part, the closed end of the core body cavity part is attached to the valve core seat, and the guide column is inserted into the valve core seat and is in sliding fit with the valve core seat; the air seal rubber particles are arranged on the particle seat, the half shaft is hinged to the hinge cavity, the crank arm is matched with the limiting groove, and the upper end of the screw is matched with the screw seat. The float bowl is in sliding fit with the water inlet pipe, and the lower end of the screw 7 is connected with the float bowl. The valve body is provided with the vertically-through water outlet connector pipe, the upper end of the water outlet connector pipe is communicated with the atmosphere, and anti-siphon water return is effectively achieved.

Description

Technical Field

[0001] The present invention relates to a device for flushing a toilet tank, in particular to a water inlet valve. Background Art

[0002] The current existing technology, Chinese patent 201120264745.0, a water tank inlet valve, includes a valve body, a water sealing rubber cover, a valve cover, a lever and a float. The valve cover is connected to the valve body to form a valve cavity, and the valve body is provided with a water inlet pipe connected to the valve cavity; the water sealing rubber cover is arranged in the valve cavity, the bottom end of the water sealing rubber cover is connected to the lever, the lever and the float are connected through an adjusting screw, and the water sealing rubber cover forms a seal or opens the water inlet of the valve body under the action of the lever. It is characterized in that: a latch is provided on the top surface of the water sealing rubber cover, and a boss is provided on the latch. A small groove is cut into the boss; a water-sealing silicone pad is installed on the top surface of the water-sealing rubber cover, which is fitted into the latch. When water enters through the small groove on the boss of the water-sealing rubber cover, the water-sealing silicone pad is relatively thin. Under the pressure of the water inlet, the inclined surface between the water-sealing silicone pad and the water-sealing rubber cover will create a large gap to allow water to enter. The float rises due to the buoyancy of the water, and the float drives the pressure rod to close the small hole in the valve cover. When the pressure is high enough, the water-sealing rubber cover is pushed to press the water-sealing silicone pad against the valve body, stopping the water inlet valve from entering. At the same time, dirt and sediment in the water can be carried away, preventing blockage and failure of the water inlet valve. The problem is that siphoning backwater is prone to occur. Summary of the Invention

[0003] The purpose of the present invention is to provide a water inlet valve for preventing siphon backflow, which has the characteristics of siphon backflow.

[0004] The present invention is realized as follows: an anti-siphon backflow water inlet valve, which is special in that it includes a valve body, a movable valve core, a sealing member, a valve cover, a water inlet pipe, a float, a screw, an air-sealing rubber particle and a water inlet lever.

[0005] The valve body includes an outlet pipe, an inlet pipe, a valve cavity and a valve core seat provided in the valve cavity. The inlet pipe is connected to the valve cavity. The hollow end of the valve core seat is open and the closed end is connected to the outlet pipe. The valve cavity is provided with a countersunk hole.

[0006] The movable valve core comprises a core body with an open end and a guide column with a water guide groove, and an annular groove is provided at one end of the guide column adjacent to the core body;

[0007] The sealing member has an opening at one end and comprises a core cavity, an interface cavity and an annular seat plate, and a mounting hole is provided on the end plate of the core cavity;

[0008] The valve cover includes an inserting interface, an inlet and outlet seat, and a hinge cavity, wherein the hinge cavity has an end opening and a limiting groove;

[0009] The water inlet lever includes a screw seat, a straight arm, a crank arm and a hinged frame plate, and the hinged frame plate includes a half shaft and a particle seat provided on both sides of the upper part;

[0010] The core body is embedded in the core body cavity, the guide column extends from the core body cavity, and the core body cavity end plate at the mounting hole is engaged with the annular groove; the annular seat plate is fitted with the bottom plate of the countersunk hole, the valve cover is inserted into the valve cavity and presses the annular seat plate, the plug interface is inserted into the interface cavity, the closed end of the core body cavity is fitted with the valve core seat, the guide column is inserted into the valve core seat and slides together; the air sealing rubber particles are arranged on the particle seat, the half shaft is hinged to the hinge cavity, the crank arm is matched with the limit groove, and the upper end of the screw is matched with the screw seat; the water inlet pipe is connected to the water outlet interface pipe, the float is slidably matched with the water inlet pipe, and the lower end of the screw 7 is connected to the float.

[0011] The anti-siphon backwater inlet valve is special in that an air pipe with an upper opening is arranged inside the upper end of the water outlet interface pipe, the upper end of the air pipe is connected to the upper end of the water outlet interface pipe, and there is a gap between the air pipe and the water outlet interface pipe.

[0012] The anti-siphon backflow water inlet valve is special in that: the core of the movable valve core is provided with a positioning column;

[0013] A positioning hole is provided on the end plate of the core cavity of the sealing member; and a positioning post is inserted into the positioning hole.

[0014] The anti-siphon backflow water inlet valve is special in that: the valve cover is provided with a locking groove and an axial positioning protrusion, and the locking groove includes a circumferential wall portion and an axial wall portion;

[0015] A locking block is provided in the valve cavity, and an axial positioning groove is provided on the locking block;

[0016] The locking groove is screwed into the locking block, and the axial positioning protrusion is engaged with the axial positioning groove.

[0017] The anti-siphon backwater inlet valve is special in that a filter mesh is provided in the water inlet interface pipe.

[0018] The invention discloses an anti-siphon water backflow water inlet valve. A water outlet interface pipe is provided on the valve body and is passed through from top to bottom. The upper end of the water outlet interface pipe is connected to the atmosphere, thereby effectively preventing the water from siphoning backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the valve closed state of the present invention.

[0020] Figure 2 It is a cross-sectional view of the valve-opening state of the present invention.

[0021] Figure 3 yes Figure 1 A-A view of.

[0022] Figure 4 It is a three-dimensional cross-sectional view of the valve body of the present invention.

[0023] Figure 5 It is one of the three-dimensional exploded views of the present invention.

[0024] Figure 6 This is the second exploded perspective view of the present invention.

[0025] Figure 7 It is the third exploded view of the present invention.

[0026] Figure 8 It is a perspective view of the present invention. DETAILED DESCRIPTION

[0027] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0029] like Figure 1 As shown, an anti-siphon backflow water inlet valve includes a valve body 1, a movable valve core 2, a sealing member 3, a valve cover 4, a water inlet pipe 5, a float 6, a screw 7, an air-sealing rubber particle 8 and a water inlet lever 9.

[0030] The valve body 1 includes an outlet pipe 11, an inlet pipe 12, a valve cavity 13, and a valve core seat 14 located in the valve cavity 13. The inlet pipe 12 is connected to the valve cavity 13. The valve core seat 14 is hollow and has one open end. The closed end is connected to the outlet pipe 11 through a water guide channel 15. The valve cavity 13 is provided with a countersunk hole 131. A filter mesh is provided in the inlet pipe 12.

[0031] The movable valve core 2 includes a core body 21 with an open end and a guide column 22 with a water guide groove. An annular groove (not marked) is provided at one end of the guide column 22 adjacent to the core body 21.

[0032] The sealing member 3 is open at one end and includes a core cavity 31, an interface cavity 32 and an annular seat plate 33. A mounting hole 311 is provided on the end plate of the core cavity 31.

[0033] The valve cover 4 includes an inserting port 41, an inlet and outlet seat 42 and a hinge cavity 43. The hinge cavity 43 has an end opening and a limiting groove 431 provided on the circumferential wall.

[0034] The water inlet lever 9 includes a screw seat 91, a straight arm 92, a crank arm 93 and a hinged frame 94. The hinged frame 94 includes a half shaft and a particle seat provided on both sides of the upper part;

[0035] The core body 21 is embedded in the core body cavity 31, the guide column 22 extends from the core body cavity 31, and the end plate of the core body cavity 31 at the mounting hole 311 is engaged with the annular groove; the annular seat plate 33 is fitted with the bottom plate of the countersunk hole 131, the valve cover 4 is inserted into the valve cavity 13 and presses the annular seat plate 33, the plug interface 41 is inserted into the interface cavity 32, the closed end of the core body cavity 31 is fitted with the valve core seat 14, the guide column 22 is inserted into the valve core seat 14 and slides; the air sealing rubber particles 8 are arranged on the particle seat on the hinge frame plate 94, the half shaft is hinged to the hinge cavity 43, the crank arm 93 cooperates with the limit groove 431, and the upper end of the screw 7 cooperates with the screw seat 91; the water inlet pipe 5 is connected to the water outlet interface pipe 11, the float 6 slides with the water inlet pipe 5, and the lower end of the screw 7 is connected to the float 6;

[0036] Figure 1 、 Figure 8 This is a static state view, that is, the state after the flushing tank is filled with water; the air seal particles 8 and the inlet and outlet seats 42 are sealed together, the end plate of the closed end of the core cavity 31 is in contact with the valve core seat 14, and the seal 3 and the valve cover 4 form a closed pressure chamber; when the water level in the flushing tank drops, as shown Figure 8 As shown, the float 6 moves downward, the water inlet lever 9 rotates counterclockwise, and the air seal rubber particles 8 leave the inlet and outlet seats 42, as shown in FIG. Figure 2 As shown; Under the action of water pressure, the movable valve core 2, Figure 1 As the valve moves leftward, a gap appears between the end plate at the closed end of the core cavity 31 and the valve core seat 14, causing the guide column to move within the valve core seat 14. Water enters the valve cavity 13 through the water inlet interface pipe 12 and the water guide channel 15, and then enters the toilet tank through the valve core seat 14, the water outlet interface pipe 11, and the water inlet pipe 5. As the water level in the tank rises, the float gradually moves upward, and the water inlet lever 9 rotates clockwise until the set water level is reached. The air seal particles 8 and the inlet and outlet seats 42 are sealed, and the end plate at the closed end of the core cavity 31 is in contact with the valve core seat 14, stopping water inflow. Because the water outlet interface pipe 11 is continuous from top to bottom and its upper end is connected to the atmosphere, siphoning back of water in the toilet tank is effectively prevented.

[0037] As a further improvement of the present invention: an air pipe 111 with upper and lower openings is provided in the upper end of the water outlet pipe 11, and the length of the air pipe 111 is shorter than the length of the water outlet pipe 11;

[0038] The lower end of the air tube 111 is located below the horizontal plane where the axis of the valve core seat 14 is located;

[0039] The upper end of the air pipe 111 is connected to the upper end of the water outlet pipe 11, and there is a gap between the air pipe 111 and the water outlet pipe 11. The water flowing out of the valve core seat 14 enters the gap between the air pipe 111 and the water outlet pipe 11, and then enters the lower end of the water outlet pipe 11.

[0040] As a further improvement of the present invention: the core body 21 of the movable valve core 2 is provided with a positioning column 211;

[0041] A positioning hole 312 is provided on the end plate of the core cavity 31 of the sealing member 3 , and the positioning post 211 is inserted into the positioning hole 312 to prevent the movable valve core 2 from rotating.

[0042] As a further improvement of the present invention: the valve cover 4 is provided with a locking groove 44 and an axial positioning protrusion 45 provided in the locking groove, and the locking groove 44 includes a circumferential wall portion 441 and an axial wall portion 442;

[0043] A locking block 132 is provided in the valve cavity 13, and an axial positioning groove is provided on the locking block 132;

[0044] The locking groove 44 is screwed into the locking block 132, and the axial positioning protrusion 45 is engaged with the axial positioning groove to prevent loosening.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An anti-siphon water inlet valve, characterized by: It includes valve body, movable valve core, seal, valve cover, water inlet pipe, float, screw, air seal rubber and water inlet lever. The valve body includes an outlet interface pipe, an inlet interface pipe, a valve cavity and a valve core seat arranged in the valve cavity, the inlet interface pipe is connected to the valve cavity, one end of the hollow of the valve core seat is open, and the closed end is connected to the outlet interface pipe, and a countersunk hole is arranged on the valve cavity; The movable valve core comprises a core body with an opening at one end and a guide column with a water guide groove, and an annular groove is provided at one end of the guide column adjacent to the core body; The sealing member has an opening at one end and comprises a core cavity, an interface cavity and an annular seat plate, and a mounting hole is arranged on the end plate of the core cavity; The valve cover comprises an inserting interface, an inlet and outlet seat and a hinge cavity, wherein the hinge cavity has an end opening and a limiting groove; The water inlet lever comprises a screw seat, a straight arm, a crank arm and a hinged frame plate, and the hinged frame plate comprises a half shaft and a particle seat arranged on both sides of the upper part; The core body is embedded in the core body cavity, the guide column extends from the core body cavity, the core body cavity end plate at the mounting hole is embedded in the annular groove; the annular seat plate is fitted with the bottom plate of the countersunk hole, the valve cover is inserted into the valve cavity and presses the annular seat plate, the plug interface is inserted into the interface cavity, the closed end of the core body cavity is fitted with the valve core seat, the guide column is inserted into the valve core seat and slides together; the air sealing rubber particles are arranged on the particle seat, the half shaft is hinged to the hinge cavity, the crank arm is matched with the limit groove, and the upper end of the screw is matched with the screw seat; the water inlet pipe is connected to the water outlet interface pipe, the float is slidably matched with the water inlet pipe, and the lower end of the screw 7 is connected to the float.

2. The anti-siphon backflow water inlet valve according to claim 1, characterized in that: An air pipe with upper and lower openings is arranged in the upper end of the water outlet interface pipe, the upper end of the air pipe is connected to the upper end of the water outlet interface pipe, and there is a gap between the air pipe and the water outlet interface pipe.

3. The anti-siphon backflow water inlet valve according to claim 1, characterized in that: The core body of the movable valve core is provided with a positioning column; A positioning hole is arranged on the end plate of the core cavity of the sealing member; a positioning post is inserted into the positioning hole.

4. The anti-siphon backflow water inlet valve according to claim 1, characterized in that: The valve cover is provided with a locking groove and an axial positioning protrusion, and the locking groove includes a circumferential wall portion and an axial wall portion; A locking block is provided in the valve cavity, and an axial positioning groove is provided on the locking block; The locking groove is screwed with the locking block, and the axial positioning protrusion is engaged with the axial positioning groove.

5. An anti-siphon backflow water inlet valve according to claim 1, 2, 3 or 4, characterized in that: A filter mesh is arranged in the water inlet interface pipe.

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