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] This utility model relates to a device for flushing toilet tanks, and in particular to a water inlet valve. Background Technology

[0002] The existing technology, Chinese patent 201120264745.0, describes a water tank inlet valve, including a valve body, a sealing cap, a valve cover, a lever, and a float. The valve cover and valve body are connected to form a valve cavity, and the valve body has an inlet pipe connected to the valve cavity. The sealing cap is disposed inside the valve cavity, and its bottom end is connected to the lever. The lever and float are connected via an adjusting screw. Under the action of the lever, the sealing cap seals or opens the inlet pipe of the valve body. The sealing cap is characterized by a locking position on its top surface, with a protrusion on the locking position. A small groove is cut into the boss; a sealing silicone pad is installed on the top surface of the sealing cap, and the sealing silicone pad is fitted into the locking position; when water enters through the small groove on the boss of the sealing cap, because the sealing silicone pad is relatively thin, under the water pressure, the inclined surface between the sealing silicone pad and the sealing cap will open a large gap to allow water to enter. The float is lifted by the buoyancy of the water, and the float drives the pressure rod to close the small hole on the valve cover. When the pressure is high enough, it pushes the sealing cap to press the sealing silicone pad tightly against the valve body, and the water inlet valve stops water intake. At the same time, dirt and silt in the water can be carried away to prevent blockage and failure of the water inlet valve. The problem is: it is prone to siphon backflow. Utility Model Content

[0003] The purpose of this utility model is to provide an inlet valve that prevents siphon backflow, and it has the characteristic of preventing siphon backflow.

[0004] This utility model is implemented as follows: a water inlet valve for preventing siphon backflow, characterized in that it includes a valve body, a movable valve core, a sealing element, a valve cover, a water inlet pipe, a float, a screw, air-sealing rubber particles, and a water inlet lever.

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

[0006] The movable valve core includes a core part with one end open and a guide post with a water guide groove. The guide post and the core part are provided with an annular groove at the adjacent end.

[0007] The seal is open at one end and includes a core cavity, an interface cavity, and an annular seat plate. The end plate of the core cavity is provided with mounting holes.

[0008] The valve cover includes a plug portion, an inlet / outlet seat, and a hinge cavity, the hinge cavity having 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. The hinged frame plate includes a half shaft and a pellet seat located on both sides of the upper part.

[0010] The core part is embedded in the core cavity, the guide post extends from the core cavity, and the end plate of the core cavity at the mounting hole is fitted 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 insertion interface is inserted into the interface cavity, the closed end of the core cavity is fitted with the valve core seat, the guide post is inserted into the valve core seat and slides; the air seal granules are set on the granule seat, the half shaft is hinged to the hinge cavity, the crank arm is fitted with the limiting groove, and the upper end of the screw is fitted with the screw seat; the water inlet pipe is connected to the water outlet interface pipe, the float is slidably fitted with the water inlet pipe, and the lower end of the screw 7 is connected to the float.

[0011] The water inlet valve for preventing siphon water return is characterized in that: an air pipe with an upper opening is installed 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 water inlet valve for preventing siphon backflow is characterized in that: the core of the movable valve core is provided with a positioning post;

[0013] The end plate of the core cavity of the seal is provided with a positioning hole; the positioning pin is inserted into the positioning hole.

[0014] The water inlet valve for preventing siphon backflow is 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;

[0015] The valve cavity is provided with a locking block, and the locking block is provided with an axial positioning groove;

[0016] The locking groove and the locking block are screwed together, and the axial positioning protrusion and the axial positioning groove are engaged.

[0017] The water inlet valve for preventing siphon backflow is characterized in that a filter screen is provided inside the water inlet interface pipe.

[0018] This utility model discloses an anti-siphon water inlet valve, which features a water outlet pipe running vertically through the valve body. The upper end of the water outlet pipe is connected to the atmosphere, effectively preventing siphon water backflow. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the valve in the closed state of this utility model.

[0020] Figure 2 This is a cross-sectional view of the present invention in the open valve state.

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

[0022] Figure 4 This is a three-dimensional sectional view of the valve body of this utility model.

[0023] Figure 5 This is one of the exploded perspective views of this utility model.

[0024] Figure 6 This is the second exploded perspective view of this utility model.

[0025] Figure 7 This is the third exploded perspective view of this utility model.

[0026] Figure 8 This is a perspective view of the present invention. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

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

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

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

[0031] The movable valve core 2 includes a core part 21 with one end open and a guide post 22 with a water guide groove. The guide post 22 and the core part 21 are provided with an annular groove (not marked) at the adjacent end.

[0032] The sealing element 3 has an opening at one end and includes a core cavity 31, an interface cavity 32, and an annular seat plate 33. The end plate of the core cavity 31 is provided with a mounting hole 311.

[0033] The valve cover 4 includes a plug-in portion 41, an inlet / 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 plate 94. The hinged frame plate 94 includes a half shaft and a pellet seat located on both sides of the upper part.

[0035] The core part 21 is embedded in the core cavity 31, the guide post 22 extends out from the core cavity 31, and the end plate of the core cavity 31 at the mounting hole 311 is fitted 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 insertion interface part 41 is inserted into the interface cavity 32, the closed end of the core cavity 31 is fitted with the valve core seat 14, and the guide post 22 is inserted into the valve core seat 14 and slides; the air seal granules 8 are set on the granule seat on the hinge frame plate 94, the half shaft is hinged to the hinge cavity 43, the crank arm 93 is fitted with the limiting groove 431, and the upper end of the screw 7 is fitted with the screw seat 91; the water inlet pipe 5 is connected to the water outlet interface pipe 11, the float 6 is slidably fitted 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 view in a static state, i.e., the state after the toilet tank is filled with water; the air-sealing granules 8 and the air inlet / outlet seat 42 are fitted together in a sealed manner, the end plate of the closed end of the core cavity 31 is fitted with the valve core seat 14, and the sealing element 3 and the valve cover 4 form a closed pressure chamber; when the water level in the toilet tank drops, such as Figure 8 As shown, the float 6 moves downward, the inlet lever 9 rotates counterclockwise, and the air seal granules 8 leave the inlet and outlet seats 42, as... Figure 2 As shown; under the action of water pressure, the movable valve core 2, in Figure 1 As the water moves to the left, a gap appears between the end plate of the closed end of the core cavity 31 and the valve core seat 14, and the guide column moves within the valve core seat 14. Water enters the valve cavity 13 through the inlet pipe 12 and the water guide channel 15; then it enters the toilet tank through the valve core seat 14, the outlet pipe 11, and the inlet pipe 5. As the water level in the tank rises, the float gradually moves upward, and the inlet lever 9 rotates clockwise until the set water level is reached. The air seal granules 8 and the air inlet / outlet seat 42 seal together, and the end plate of the closed end of the core cavity 31 fits against the valve core seat 14, stopping the water intake. Because the outlet pipe 11 is vertically continuous and its upper end is open to the atmosphere, it effectively prevents the water in the toilet tank from siphoning back.

[0037] As a further improvement of this utility model: the upper end of the water outlet pipe 11 is provided with an air pipe 111 with openings at the top and bottom, and the length of the air pipe 111 is less than the length of the water outlet pipe 11.

[0038] The lower end of the air pipe 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 this utility model: the core part 21 of the movable valve core 2 is provided with a positioning post 211;

[0041] The end plate of the core cavity 31 of the sealing element 3 is provided with a positioning hole 312; the positioning pin 211 is inserted into the positioning hole 312 to prevent the movable valve core 2 from rotating.

[0042] As a further improvement of this utility model: the valve cover 4 is provided with a locking groove 44 and an axial positioning protrusion 45 provided in the locking groove. The locking groove 44 includes a circumferential wall portion 441 and an axial wall portion 442.

[0043] The valve cavity 13 is provided with a locking block 132, and the locking block 132 is provided with an axial positioning groove;

[0044] The locking groove 44 screws into the locking block 132, and the axial positioning protrusion 45 engages with the axial positioning groove. This prevents loosening.

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

Claims

1. A water inlet valve for preventing siphon backflow, characterized in that: This includes the valve body, movable valve core, seals, valve cover, inlet pipe, float, screw, air seal granules, and inlet lever. The valve body includes an outlet pipe, an inlet pipe, a valve cavity, and a valve core seat located in the middle, which are connected vertically. The inlet pipe and the valve cavity are connected. The valve core seat is hollow with one open end and the closed end connected to the outlet pipe. The valve cavity is provided with a countersunk hole. The movable valve core includes a core part with one end open and a guide post with a water guide groove. The guide post and the core part are provided with an annular groove at the adjacent end. The seal is open at one end and includes a core cavity, an interface cavity, and an annular seat plate. The end plate of the core cavity is provided with mounting holes. The valve cover includes a plug portion, an inlet / outlet seat, and a hinge cavity, the hinge cavity having an end opening and a limiting groove; The water inlet lever includes a screw seat, a straight arm, a crank arm, and a hinged frame plate. The hinged frame plate includes a half shaft and a pellet seat located on both sides of the upper part. The core part is embedded in the core cavity, and the guide post extends from the core cavity. The end plate of the core cavity at the mounting hole is fitted 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 against the annular seat plate. The insertion interface is inserted into the interface cavity. The closed end of the core cavity is fitted with the valve core seat, and the guide post is inserted into the valve core seat and slides. The air-sealing granules are set on the granule seat. The half shaft is hinged to the hinge cavity. The crank arm is fitted with the limiting groove. The upper end of the screw is fitted with the screw seat. The inlet pipe is connected to the outlet interface pipe. The float is slidably fitted with the inlet pipe. The lower end of the screw is connected to the float.

2. The anti-siphon water return inlet valve according to claim 1, characterized in that: The upper end of the water outlet pipe is provided with an air pipe with openings at the top and bottom. The upper end of the air pipe is connected to the upper end of the water outlet pipe, and there is a gap between the air pipe and the water outlet pipe.

3. The anti-siphon water return inlet valve according to claim 1, characterized in that: The core of the movable valve core is provided with a positioning post; The end plate of the core cavity of the seal is provided with a positioning hole; the positioning pin is inserted into the positioning hole.

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

5. A water inlet valve for preventing siphon backflow as described in claim 1, 2, 3 or 4, characterized in that: The water inlet pipe is equipped with a filter screen.

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