One-way electromagnetic valve

Abstract

According to the one-way electromagnetic valve, a non-return mechanism is arranged at a water outlet, and when water flows out of the water outlet, a piston of a non-return valve can be pressed downwards to flow out. However, when water flows back from the water outlet, the check valve piston is extruded in the reverse direction, so that the check valve piston and the check valve shell are sealed more tightly and cannot flow back, and accumulated water retention in the valve is reduced. And the water flow at the water inlet is shunted into the two cavities by the valve seat, so that the flow path required when the electromagnetic valve is opened can be reduced. Meanwhile, the water inlet and the water outlet are formed in the bottom surface of the electromagnetic valve, so that the electromagnetic valve is convenient to disassemble and assemble, the electromagnetic valve can be assembled only by inserting and then assembling several screws, the screws are disassembled and directly pulled out, and the electromagnetic valve is reliable and convenient to disassemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pipeline valve field, concretely relates to a pilot direct insertion type electromagnetic valve of one -way flow. BACKGROUND

[0002] Valves are everywhere in people's daily life, which can control the flow of liquid or gas. In life, people contact valves more with water, such as washing hands or drinking water, which need to control the flow of water through valves. Therefore, valves need to be in contact with water for a long time, and traditional valves control the opening and closing of valves manually. The valve opening and closing time is long, and it is difficult to replace and disassemble and install when damage occurs. And it is difficult for the traditional valve to control water to flow from the water inlet to the water outlet, and the liquid pressure is affected to produce backflow, and the liquid is accumulated in the electromagnetic valve.

[0003] For example, the "direct insertion type electromagnetic valve structure" disclosed in the announcement number CN206754527U, the electromagnetic valve is of plug-in structure, but only one set of electromagnetic coil is used inside, and the electromagnetic coil is installed inside the valve seat, and the flow of water depends on the opening and closing of the electromagnet. To ensure the flow of the pipeline, the pipe diameter needs to be sufficient, and the bottom area of the electromagnet also needs to be large enough to cover the pipe diameter. The demand for magnetic force is also greater, and more power is consumed, and the water outlet does not have an anti-backflow structure, and cannot guarantee that there is no water accumulation in the valve. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides a one-way electromagnetic valve, a check valve assembly is arranged at the water outlet of the one-way electromagnetic valve, and the water flowing out of the water outlet is not affected. However, when water flows back from the water outlet, it cannot flow in, which ensures that there is no water accumulation in the valve, reduces the corrosion of the electromagnet assembly in a humid environment, and reduces the breeding of bacteria. At the same time, the water inlet and the water outlet are arranged on the same face, which facilitates the disassembly and installation of the electromagnetic valve. Only a few screws need to be inserted and installed, and the disassembly can be realized by pulling out the screws directly.

[0005] The utility model is realized by the following technical means.

[0006] A one-way electromagnetic valve, comprising a valve cover and a valve seat, the bottom of the valve seat is provided with a water inlet and a water outlet, and the water inlet and the water outlet are arranged on the same face and have similar end port end height.

[0007] A check valve assembly is arranged in the water outlet, and the connection between the water inlet and the valve seat is divided into two ports.

[0008] Further, the valve seat is divided into three chambers, one side chamber is connected with the water outlet, the middle chamber and the other side chamber are connected with the water inlet, the pilot hole on the valve cover is located in the middle chamber and the chamber connected with the water outlet.

[0009] Further, a pressing seat is arranged in the valve cover, the pressing seat covers the iron core assembly, the outer wall of the pressing seat is close to a part of the inner wall of the valve cover, and the other part is close to the valve seat, and the end of the pressing seat is inserted into the outer ring of the valve disc sealing gasket.

[0010] Further, the check valve assembly is tightly close to the inner wall of the water outlet and is squeezed in the pipeline of the water outlet.

[0011] Further, the check valve assembly is composed of a check valve shell, a check valve sleeve and a check valve piston, and the check valve sleeve is covered in the check valve shell except the base.

[0012] The check valve piston is located in the chamber composed of the check valve shell and the check valve sleeve, and one end of the check valve piston is extended from one end of the base.

[0013] Further, the upper part of the check valve shell has a larger wall thickness, the lower part has a smaller wall thickness, the inner wall of the junction between the upper part and the lower part of the check valve shell is an inclined surface, the check valve shell O-shaped ring is embedded on the outer side of the check valve shell, and the check valve shell O-shaped ring is in interference fit with the inner wall of the water outlet.

[0014] Further, the upper part of the check valve piston is larger, the lower part has a smaller diameter and is in a rod shape, the upper part of the check valve piston is in a trapezoidal layout, and the check valve piston O-shaped ring is semi-embedded on the side wall of the upper part of the check valve piston.

[0015] The check valve spring is arranged between the check valve piston and the base of the check valve sleeve, and the base of the check valve sleeve extends upward by a sleeve pipe at the matching position of the check valve sleeve and the check valve piston.

[0016] Further, the inner wall of the valve seat is in a stepped shape, the middle step is provided with an annular groove, and the valve disc sealing gasket arranged in the valve seat is matched and installed with the annular groove.

[0017] The outer ring of the valve disc sealing gasket is in a few-shaped type and is matched with the annular groove, and the valve disc sealing gasket is hung on the middle step.

[0018] Further, the middle part of the valve disc sealing gasket is provided with an opening, the valve disc is arranged at the opening, the valve disc is provided with a pilot hole at the center position, and the valve disc clamps the valve disc sealing gasket.

[0019] The utility model has the following gain effects:

[0020] The one-way electromagnetic valve is provided with a check mechanism at the water outlet, and water flowing out of the water outlet is not affected, but when water flows reversely from the water outlet, the water cannot flow in, so that water accumulation in the valve is avoided, corrosion of the electromagnetic assembly in a humid environment is reduced, and bacterial growth is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a sectional view structure schematic diagram of the utility model.

[0022] Figure 2 is a check valve structure schematic diagram of the utility model.

[0023] In the figure, 1 is a pressing seat, 2 is a framework, 3 is an upper sleeve, 4 is an insert piece, 5 is a spring, 6 is an iron core, 7 is a plastic-coated wire package, 8 is a lower sleeve, 9 is a framework fixing plate, 10 is an iron core sealing head, 11 is a valve seat, 12 is a sealing ring, 13 is a pagoda spring, 14 is a valve piece, 15 is a valve piece sealing gasket, 16 is a check valve shell, 17 is a check valve shell O-ring, 18 is a check valve piston O-ring, 19 is a check valve spring, 20 is a check valve sleeve, 21 is a check valve piston, 22 is a water inlet, and 23 is a water outlet. DETAILED DESCRIPTION

[0024] The utility model will be further described below in combination with the drawings and specific embodiments, but the protection scope of the utility model is not limited thereto.

[0025] Example one:

[0026] As shown in Figure 1 and Figure 2 The utility model relates to a one-way electromagnetic valve, and the utility model as a whole is composed of a valve cover and a valve seat 11. In the valve cover, mainly provided are an electromagnet and related components thereof, responsible for controlling the opening or closing of a pilot hole. On the valve seat 11, a pilot hole and a water inlet 22 and a water outlet 23 and other water flow-related components are provided in the valve seat, and inside the water outlet 23, a check valve assembly is firmly provided to prevent water from flowing reversely from the water outlet 23 into the cavity of the valve body or even at the water inlet 23.

[0027] It should be noted that compared with the general pilot electromagnetic valve, the one-way electromagnetic valve of the utility model has some differences in the flow path of the pilot hole. In the design of the conventional pilot electromagnetic valve, the water flow generally flows into the water inlet 22, passes through the assembly similar to the valve piece 14 of the utility model, and then flows out from the water outlet 23 after passing through the pilot hole. The pilot flow path is formed, the pressure difference between the upper and lower is generated, the assembly similar to the valve piece 14 separating the water inlet 22 and the water outlet 23 is opened, and finally the flow paths of the water inlet 22 and the water outlet 23 are connected.

[0028] In the utility model, the water entering the water inlet 22 into the valve seat 11 is divided into two paths, one path is in the middle chamber of the valve seat 11, and the other path enters the right chamber of the valve seat. The valve piece 14 and the valve piece sealing gasket 15 are covered above the middle chamber, and a pilot hole is arranged at the center of the valve piece 14, which is large at the bottom and small at the top. The outlet of the pilot hole is blocked by the electromagnetic iron assembly without power supply. In the right chamber flowing from the water inlet 22, but the right chamber is completely covered above by the valve piece sealing gasket 15, and there is no pilot hole structure, so the water in the right chamber cannot enter before the valve piece sealing gasket 15 and the valve piece 14 are completely opened.

[0029] Therefore, in the utility model, after the electromagnetic iron assembly opens the pilot hole, water will directly flow into the pilot hole, flow to the upper part of the left chamber corresponding to the water outlet 23, pass through the pilot hole arranged in the left chamber by the valve piece sealing gasket 15 and the valve piece 14, and then flow out from the water outlet 23, forming a flow path from the water inlet 22 to the water outlet 23. A low pressure area is generated above the valve piece sealing gasket 15 and the valve piece 14, a pressure difference is formed, so that the water inlet 22 and the water outlet 23 separated by the valve piece sealing gasket 15 and the valve piece 14 can be connected through the flow path, and the water flow is much larger than the flow through the pilot hole.

[0030] In the electromagnetic valve, because the iron core assembly blocks the pilot hole. Therefore, when the pilot hole is opened, water will flow into the chamber where the iron core is located through the pilot hole. The iron core 6 will inevitably come into contact with water, and the contact between the iron core 6 and water does not affect the magnetic field acting on it and the magnetic force acting on it. However, the plastic-coated wire package 7 cannot come into contact with water because it generates a magnetic field when powered. Therefore, although the iron core 6 and the plastic-coated wire package 7 are separated by the pressure seat 1. The pressure seat 1 is in the shape of a few characters, completely covering the iron core assembly. And the pressure seat 1 below the few characters is close to the inner wall of the valve cover and the valve seat 11. The lowermost end of the pressure seat 1 is inserted into the outermost end of the valve piece sealing gasket 15.

[0031] The pressure seat 1 is a thin-walled shell structure component, the uppermost end of the inner wall of the pressure seat 1 is provided with a convex pressure head to press against one end of the spring 5, and the other end of the spring 5 is connected with the iron core 6. The upper end of the iron core 6 is sleeved with the spring 5 with a smaller diameter, the middle section has a larger diameter, and the end is in inverted T shape and connected with the iron core sealing head 10. The uppermost end of the pressure seat 1 is also provided with a framework 2, which covers the outer side of the valve cover and fixes the valve cover. The outer side of the pressure seat 1 is provided with a tubular upper sleeve 3 to cover the connection part of the pressure seat 1 and the spring 5 and the whole part of the spring 5. After a certain interval, a tubular lower sleeve 8 covers the part of the pressure seat 1 matched with the iron core 6 and contacts the platform position of the several-shaped platform of the pressure seat 1 and stands on the platform.

[0032] The platform is horizontally provided with a ring-shaped framework fixing plate 9 which covers the outer side of the end of the lower sleeve 8 and is matched with the several-shaped platform position of the pressure seat 1. The outer circle of the framework fixing plate 9 has a diameter larger than the diameter of the valve seat 11 in contact with the framework fixing plate 9. The cavity composed of the framework fixing plate 9 and the valve seat 11 is matched with the outer wall of the several-shaped platform of the pressure seat 1 and the downward extension section of the platform.

[0033] The plastic-coated wire package 7 completely covers the framework 2, the upper sleeve 3, the lower sleeve 8 and the framework fixing plate 9 from the side, provides certain support for the valve cover, can generate a magnetic field by power supply to drive the movement of the iron core 6, and the plug-in piece 4 is horizontally installed at the upper outer side of the plastic-coated wire package 7 and can be used for power supply of the plastic-coated wire package 7. The valve cover is designed for convenient manufacturing and has high structural strength. The water outlet 23 of the valve seat 11 is provided with a check valve assembly. The check valve assembly is mainly composed of a check valve shell 16 and a check valve sleeve 20 to build the main structural components of the check valve. The check valve shell 16 and the check valve sleeve 20 are embedded with each other. The check valve shell 16 is a tubular structure with both ends open. The upper end wall of the check valve shell 16 is thicker and uneven. The inner wall of the upper end is downwardly provided with a slope. The lower part of the upper end of the check valve shell 16 is uniform and thin. The outer wall of the check valve shell 16 is close to a cylinder. The check valve shell 16 is provided with an annular groove at the outer wall of the upper end. The groove is provided with a check valve shell O-ring 17 which is half-embedded in the check valve shell 16.

[0034] The check valve sleeve 20 is a cylindrical structure. The diameter of the outer side of the cylinder wall of the check valve sleeve 20 is close to the inner wall of the check valve shell 16. The top end of the cylinder wall of the check valve sleeve 20 has a step which is coincided with the outer wall of the cylinder wall. The step is embedded with the bottom of the wall of the upper end of the check valve shell 16. The bottom near the cylinder of the check valve sleeve 20 is outwardly provided with a boss which is matched with the groove in the inner wall of the lower part of the cylinder wall of the check valve shell 16. The bottom of the check valve sleeve 20 outwardly extends a platform which is in contact with the bottom of the check valve shell 16 and stands thereon.

[0035] The check valve piston 21 is in the shape of an umbrella, and the umbrella portion of the check valve piston 21 is in the shape of a circular truncated cone. The slope of the waist of the umbrella portion cooperates with the slope in the inner wall of the upper end of the check valve shell 16, and the diameter of the lowermost portion of the umbrella portion is greater than the minimum inner diameter of the upper portion of the check valve shell 16. A groove is provided in the waist of the umbrella portion, and the check valve piston O-ring 18 is half-embedded in the groove. A check valve spring 19 is provided at the joint between the umbrella portion and the umbrella handle of the check valve piston 21.

[0036] A through hole is provided in the center of the bottom of the check valve sleeve 20, and cooperates with the umbrella handle of the check valve piston 21. A sleeve pipe extends upward from the position of the through hole of the check valve sleeve 20. The other end of the check valve spring 19 is sleeved on the sleeve pipe, and the sleeve pipe also functions as a guide, allowing the check valve piston 21 to move vertically in the sleeve pipe.

[0037] Therefore, the check valve assembly allows water to flow in one direction and prevents water from flowing back from the water outlet 23, by cooperation of the umbrella portion of the check valve piston 21 and the slope of the upper portion of the check valve shell 16. When water flows out of the water outlet 23, the upper portion of the check valve assembly is filled with water and the lower portion is filled with air, and the pressure in the upper portion is greater than that in the lower portion. The check valve piston 21 is pressed downward, and the check valve spring 19 is compressed, and the check valve is opened, allowing water to flow out of the water outlet 23. When the water flow is complete, the check valve piston 21 is lifted by the elastic force of the check valve spring 19, until the check valve piston O-ring 18 contacts the slope of the upper portion of the check valve shell 16, thereby closing the check valve.

[0038] If water flows back from the lower portion of the water outlet 23, on the one hand, the gap between the umbrella handle of the check valve piston 21 and the cooperating position of the check valve sleeve 20 is small, and the resistance to backflow of the water is large, and it is difficult for the water to enter the cavity of the check valve, and when the water reaches the bottom of the umbrella portion, on the other hand, the lower portion of the check valve piston 21 is filled with water and the upper portion is filled with air, and the pressure in the lower portion is greater than that in the upper portion, and the umbrella portion is pressed upward. The check valve piston O-ring 18 is tightly pressed against the slope of the upper portion of the check valve shell 16, and the check valve piston O-ring is made of flexible material such as rubber. Therefore, when the check valve piston O-ring 18 is pressed, the check valve piston O-ring 18 can be in full contact with the slope of the upper portion of the check valve shell 16, thereby blocking the passage of water flowing back from the water outlet 23 into the valve.

[0039] Moreover, the check valve piston O-ring 18 is easy to recover after being pressed and is not easy to be damaged. Therefore, although the slope of the check valve piston 21 cooperates with the slope of the check valve shell 16, it is not necessary for the two to be in contact, thereby avoiding damage caused by contact between the two when the pressure is too large.

[0040] The check valve shell O-ring 17 on the outside of the check valve shell 16 is in interference fit with the inner wall of the water outlet 23, and can firmly fix the check valve inside the water outlet 23.

[0041] Example Two

[0042] Compared with the first embodiment, the overall structure of this embodiment is similar, and the main improvement lies in the valve plate structure at the pilot hole position.

[0043] like Figure 1 and Figure 2 As shown, the valve cover primarily houses the electromagnet and its associated components, which control the opening and closing of the pilot hole. The valve seat 11 includes the pilot hole, as well as components related to water flow, such as the water inlet 22 and the water outlet 23. A check valve assembly is securely installed within the water outlet 23 to prevent water from flowing back into the chamber of the valve body, or even into the water inlet 23.

[0044] In conventional pilot-operated solenoid valve designs, water typically flows in through the water inlet 22, passes through a component similar to the valve disc 14 of the present invention, and then flows out of the water outlet 23 through the pilot hole. This forms a pilot flow path, creating a pressure differential between the upper and lower parts of the valve disc, which opens the component similar to the valve disc 14 that blocks the water inlet 22 and water outlet 23, ultimately connecting the flow paths between the water inlet 22 and the water outlet 23.

[0045] In the present invention, the water entering the valve seat 11 from the water inlet 22 is divided into two paths, one in the middle chamber of the valve seat 11, and the other in the right chamber of the valve seat. The middle chamber is covered with a valve disc 14 and a valve disc sealing gasket 15. A pilot hole is provided in the center of the valve disc 14, which is larger at the bottom and smaller at the top. The outlet of the pilot hole is blocked by an unpowered electromagnet assembly. In the right chamber where the water inlet 22 flows in, the top of the right chamber is completely covered by the valve disc sealing gasket 15, and there is no pilot hole structure. Therefore, the water in the right chamber will not enter before the valve disc sealing gasket 15 and the valve disc 14 move upward to fully open the blockage.

[0046] The valve disc 14 is symmetrically provided with openings, which are respectively located above the water inlet 22 and the water outlet 23. Two partition plates are provided in the chamber at the bottom of the valve seat 11 to divide the valve seat 11 into three front chambers. For ease of understanding, the three chambers are illustrated here with left, middle and right. The left chamber is the chamber corresponding to the water outlet 23. The right side of the middle chamber has an opening connected to the water inlet 22, and the right chamber completely corresponds to the water inlet 22. The valve disc 14 has a boss downward above the middle chamber, and the center of the boss is provided with a pilot hole with an inner diameter that is thicker at the bottom and thinner at the top. The valve disc sealing gasket 15 above the left chamber is provided with a hole on the same axis as the valve disc 14. The upper part of the right chamber is completely blocked by the valve disc sealing gasket 15 and has no pilot hole.

[0047] The pilot hole in the center of the valve plate 14 contacts the core sealing head 10 on the core 6 when the plastic-coated wire coil 7 is not energized, is blocked by the core sealing head 10, and the valve plate gasket 15 is annular, with the central circular hole portion clamped in the boss of the valve plate 14, and the two sides of the valve plate gasket 15 are in the shape of a Chinese character, clamped in the groove of the middle step of the valve seat 11, the Chinese character structure forms an annular boss, the upper part of the valve plate 14 is in the shape of a bowl, the bowl edge is located at the annular boss, a ring-shaped protrusion is arranged at the bottom of the bowl near the middle position of the valve plate 14, clamping a small section of the conical spring 13, and the large end of the conical spring 13 is clamped at the bottom center protrusion of the pressure seat 1. The valve plate gasket 15 is made of flexible material, and the annular boss in the shape of a Chinese character can be deformed.

[0048] Therefore, in the utility model, after the electromagnetic assembly opens the pilot hole, water directly flows into the pilot hole, flows to the upper part of the left chamber corresponding to the water outlet 23, passes through the valve plate gasket 15 and the pilot hole arranged in the left chamber of the valve plate 14, and then flows out from the water outlet 23, forming a flow path from the water inlet 22 to the water outlet 23. A low-pressure area is generated above the valve plate gasket 15 and the valve plate 14, forming a pressure difference, so that the water inlet 22 and the water outlet 23 separated by the valve plate gasket 15 and the valve plate 14 can be connected through the flow path, and the water flow is much larger than the flow through the pilot hole.

[0049] In the electromagnetic valve, because the core assembly blocks the pilot hole. Therefore, when the pilot hole is opened, water flows into the chamber where the core is located through the pilot hole. The core 6 inevitably comes into contact with water, and the contact of the core 6 with water does not affect the magnetic field acting on it and the magnetic force acting on it. However, the plastic-coated wire coil 7 cannot come into contact with water because it generates a magnetic field when energized. Therefore, although the pressure seat 1 is arranged between the core 6 and the plastic-coated wire coil 7, the pressure seat 1 is in the shape of a Chinese character, completely covering the core assembly. And the lower part of the pressure seat 1 is close to the inner wall of the valve cover and the valve seat 11. The outermost end of the pressure seat 1 is inserted into the valve plate gasket 15.

[0050] The pressure seat 1 is a thin-walled shell-shaped structure component, the uppermost end of the inner wall of the pressure seat 1 is provided with a protruding pressure head which abuts against one end of the spring 5, and the other end of the spring 5 is connected with the core 6. The upper end of the core 6 is smaller in diameter to cover the spring 5, the middle section is larger in diameter, and the end is in the shape of an inverted T to be connected with the core sealing head 10. The uppermost end of the pressure seat 1 is also provided with the skeleton 2 which covers the outer side of the valve cover to fix the valve cover. The outer side of the pressure seat 1 is provided with the tubular upper sleeve 3 which covers the spring 5 connecting part of the pressure seat 1 and the whole part of the spring 5. After being spaced apart by a cavity, the tubular lower sleeve 8 covers the part of the pressure seat 1 matched with the core 6 and is in contact with the platform position of the Chinese character-shaped platform of the pressure seat 1 and stands on the platform.

[0051] The annular skeleton fixing plate 9 is horizontally arranged on the platform, and is sleeved outside the end of the lower sleeve 8 and is in contact with the platform of the valve seat 1. The outer diameter of the skeleton fixing plate 9 is larger than the diameter of the valve seat 11. The cavity formed by the skeleton fixing plate 9 and the valve seat 11 is in contact with the outer wall of the platform of the valve seat 1 and the downward extension of the platform.

[0052] The plastic-coated wire 7 completely coats the skeleton 2, the upper sleeve 3, the lower sleeve 8 and the skeleton fixing plate 9 from the side, and provides support for the valve cover and enables the electric core 6 to generate a magnetic field to drive the movement of the electric core 6. The plug 4 is horizontally arranged above the plastic-coated wire 7, and is used to supply power to the plastic-coated wire 7. The valve cover is designed for easy manufacturing and has high structural strength. The check valve assembly is arranged in the water outlet 23 of the valve seat 11, and mainly comprises a check valve shell 16 and a check valve sleeve 20. The check valve shell 16 and the check valve sleeve 20 are embedded in each other.

[0053] The check valve sleeve 20 is in a cylindrical structure, and the outer diameter of the check valve sleeve 20 is close to the inner diameter of the check valve shell 16. The top end of the check valve sleeve 20 has a step, and the outer wall of the step is coincident with the cylinder wall. The step is embedded in the bottom of the wall of the upper end of the check valve shell 16. The bottom of the check valve sleeve 20 has a boss, and the boss is matched with the groove arranged in the inner wall of the lower part of the check valve shell 16. The bottom of the check valve sleeve 20 extends outwardly to form a platform, and the bottom of the check valve shell 16 is in contact with the platform.

[0054] The check valve piston 21 is in an umbrella structure, and the umbrella part of the check valve piston 21 is in a circular truncated cone shape. The slope of the waist of the umbrella part is matched with the slope of the inner wall of the upper end of the check valve shell 16. The diameter of the lowermost part of the umbrella part is larger than the minimum inner diameter of the upper part of the check valve shell 16. A groove is arranged in the waist of the umbrella part, and the check valve O-ring 18 is half-embedded in the groove. The check valve spring 19 is arranged at the connection position of the umbrella part and the umbrella handle of the check valve piston 21.

[0055] A through hole is arranged at the center of the bottom of the check valve sleeve 20, and the through hole is matched with the umbrella handle of the check valve piston 21. The through hole of the check valve sleeve 20 extends upwardly to form a sleeve. The other end of the check valve spring 19 is sleeved on the sleeve, and the sleeve also has a guiding function, which enables the check valve piston 21 to move vertically in the sleeve.

[0056] The water inlet 22 and the water outlet 23 are all three-layer structures, and the middle two grooves are provided with sealing rings 12.

[0057] Example three:

[0058] This embodiment describes the process of opening the water flow in the energization process of the one-way electromagnetic valve of the utility model.

[0059] Before the valve plate gasket 15 and the valve plate 14 are lifted upward, the water flowing into the water inlet 22 cannot directly flow out from the water outlet 23. After the water flows into the water inlet 22, it enters the middle chamber and the right chamber. However, the water cannot flow because the right chamber is closed at the top and the pilot hole at the top of the middle chamber is blocked by the iron core sealing head 10. At this time, the plastic-coated wire package 7 is energized, the iron core 6 is attracted, the pilot hole is opened, the water flows into the middle chamber from the water inlet 22, flows into the left chamber from the pilot hole at the top of the middle chamber, and reaches the top of the check valve.

[0060] The top of the check valve assembly is water, and the bottom is air. The pressure at the top is greater than that at the bottom. The check valve piston 21 is pressed downward, the check valve spring 19 is compressed, the check valve is opened, and the water flows out from the water outlet 23. A complete flow path is formed. At this time, the liquid above the valve plate 14 flows fast with low pressure, the valve plate 14 and the valve plate gasket 15 are lifted, the water in the right chamber can also flow out from the water outlet 23 of the left chamber, forming a large flow path and supporting the valve plate 14 and the valve plate gasket 15. When the plastic-coated wire package 7 is de-energized, the iron core 6 falls and blocks the pilot hole of the middle chamber again. At this time, the liquid below the valve plate 14 and the valve plate gasket 15 flows fast with low pressure, and the valve plate 14 and the valve plate gasket 15 close the three chambers in the valve seat 11 to cut off the water flow.

[0061] When the remaining water in the valve seat 11 is exhausted, the check valve piston 21 is lifted by the elastic force of the check valve spring 19, and the check valve piston O-ring 18 contacts the inclined surface on the upper part of the check valve shell 16, thereby closing the check valve.

[0062] If water flows from the lower part of the water outlet 23, on the one hand, the resistance of the water backflow is large due to the small gap between the umbrella handle of the check valve piston 21 and the matching position of the check valve sleeve 20, and it is difficult for the water to enter the cavity of the check valve, and when the water is on the bottom of the umbrella, it enters the cavity in time. The lower part of the check valve piston 21 is water, and the upper part is air. The pressure of the lower part is greater than that of the upper part, which presses the umbrella upward. The check valve piston O-ring 18 is tightly pressed on the inclined surface of the upper part of the check valve shell 16. Because the check valve piston O-ring is made of flexible material such as rubber. Therefore, when the check valve piston O-ring 18 is pressed, the check valve piston O-ring 18 can be in full contact with the inclined surface of the upper part of the check valve shell 16, which blocks the channel through which water can flow from the water outlet 23 into the valve.

[0063] The installation of the utility model only needs to insert the water inlet 22 and the water outlet 23 into the corresponding positions, and then simply fix them by screws on both sides.

[0064] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A one-way solenoid valve, comprising a valve cover and a valve seat (11), characterized in that: The bottom of the valve seat (11) is provided with a water inlet (22) and a water outlet (23), wherein the water inlet (22) and the water outlet (23) are arranged on the same surface and the terminal ends thereof are at similar heights; A check valve assembly is provided in the water outlet (23), and the connection between the water inlet (22) and the valve seat (11) is divided into two openings.

2. The one-way solenoid valve according to claim 1, characterized in that: The interior of the valve seat (11) is divided into three chambers, one side chamber is connected to the water outlet (23), the middle chamber and the other side chamber are connected to the water inlet (22), and the pilot holes on the valve cover are respectively located in the middle chamber and the chamber connected to the water outlet (23).

3. The one-way solenoid valve according to claim 1, characterized in that: A pressure seat (1) is provided in the valve cover, and the pressure seat (1) covers the iron core assembly. The outer wall of the pressure seat (1) is close to a part of the inner wall of the valve cover, and the other part is close to the valve seat (11). The end of the pressure seat (1) is inserted into the outer ring of the valve plate sealing gasket (15).

4. The one-way solenoid valve according to claim 1, characterized in that: The outside of the check valve assembly is close to the inner wall of the water outlet (23) and is squeezed into the pipeline of the water outlet (23).

5. A one-way solenoid valve according to claim 1, 2, 3 or 4, characterized in that: The check valve assembly is composed of a check valve housing (16), a check valve sleeve (20), and a check valve piston (21). The check valve sleeve (20), except for the base, is covered inside the check valve housing (16). The check valve piston (21) is located in a chamber formed by the check valve housing (16) and the check valve sleeve (20), and one end of the check valve piston (21) extends from one end of the base.

6. The one-way solenoid valve according to claim 5, characterized in that: The upper wall thickness of the check valve housing (16) is larger, while the lower wall thickness is smaller. The inner wall at the junction of the upper and lower parts of the check valve housing (16) is an inclined surface. A check valve housing O-ring (17) is embedded on the outer side of the check valve housing (16). The check valve housing O-ring (17) is interference-fitted with the inner wall of the water outlet (23).

7. The one-way solenoid valve according to claim 5, characterized in that: The check valve piston (21) has a larger upper portion and a smaller lower portion in diameter and is rod-shaped. The upper portion of the check valve piston (21) is arranged in a trapezoidal shape, and a check valve piston O-ring (18) is half-embedded in the side wall of the upper portion of the check valve piston (21). A check valve spring (19) is provided between the check valve piston (21) and the base of the check valve sleeve (20). At the matching position of the check valve sleeve (20) and the check valve piston (21), a section of sleeve is extended upward from the base of the check valve sleeve (20).

8. The one-way solenoid valve according to claim 1 or 2 or 3 or 4 or 6 or 7, characterized in that: The inner wall of the valve seat (11) is stepped, and an annular groove is provided on the middle step. The valve plate sealing gasket (15) provided in the valve seat (11) is installed in cooperation with the annular groove. The outer ring of the valve plate sealing gasket (15) is in a "X" shape and matches the annular groove. The valve plate sealing gasket (15) is hung on the middle step.

9. The one-way solenoid valve according to claim 8, characterized in that: An opening is provided in the middle of the valve plate sealing gasket (15), a valve plate (14) is provided at the opening, a pilot hole is provided at the center of the valve plate (14), and the valve plate (14) clamps the valve plate sealing gasket (15).

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