Electromagnetic negative pressure valve

Abstract

The utility model relates to drinking water equipment technical field, concretely relates to a kind of electromagnetic negative pressure valve, including electromagnetic valve control assembly, electromagnetic valve body, negative pressure valve body, negative pressure valve cover;Water inlet pipe is equipped on electromagnetic valve body, and water outlet pipe is equipped on negative pressure valve body;Electromagnetic valve body is equipped with electromagnetic valve port, and electromagnetic valve control assembly is matched with electromagnetic valve port and is used to control the on-off of electromagnetic valve port;Negative pressure valve is equipped in negative pressure valve body, and corresponding negative pressure valve port is equipped with negative pressure valve plug and the elastic member of driving negative pressure valve plug and pressing and closing negative pressure valve port;Negative pressure valve body is equipped with air pressure diaphragm and movable element, and negative pressure valve cover is equipped with air vent.The utility model is combined with electromagnetic valve on the basis of negative pressure valve, a new combination valve appears, and the probability of water leakage is perfectly solved for long-term use of negative pressure valve;In original negative pressure valve, resonance still appears under certain working condition, and perfect solution is formed by combining electromagnetic valve control;At the same time, double confirmation insurance is formed by mechanical control and electromagnetic control.

Description

Technical Field

[0001] This utility model relates to the field of drinking water equipment technology, specifically to an electromagnetic negative pressure valve. Background Technology

[0002] Traditional drinking water equipment typically includes a water tank for storage; however, these tanks are susceptible to bacterial contamination. To address this, a negative pressure valve was developed. This valve provides the necessary water flow to the drinking water heating system. The supply pressure is unlimited, but if there is no negative pressure at the outlet, no water is dispensed. The negative pressure generated by the water pump draws water from the pressurized supply end, and the water flow stops immediately when there is no negative pressure at the outlet. The flow rate is determined by the negative pressure at the outlet (pump speed - flow rate). This valve can replace the water tank in drinking water equipment, operating in a completely sealed manner and preventing contamination of drinking water by bacteria in the air. For example, patent CN202222974778.5 describes a mechanical negative pressure water inlet valve, including a valve body with an inlet and an outlet. The valve body contains a sealing port, a sealing head, a sealing diaphragm, and a spring. The valve body has a vent hole for connecting the atmospheric cavity to the outside. A transmission structure between the sealing head and the sealing diaphragm allows the sealing diaphragm to move upwards, which in turn moves the sealing head upwards. The transmission structure includes a push plate that works in conjunction with the sealing head, located above the sealing diaphragm. The spring is positioned between the push plate and the valve body. In use, an external water pump is connected to the outlet. During operation, negative pressure is generated, attracting the sealing diaphragm to move upwards and downwards, which in turn moves the sealing head upwards via the push plate, thus connecting the inlet and outlet. The operating flow rate is determined by the external water pump's throughput, ensuring flow stability. However, in actual operation, the switching action of this structure is affected by water pressure and flow rate, resulting in drawbacks such as vibration, noise, and flow restriction. Prolonged use may lead to leakage. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an electromagnetic negative pressure valve.

[0004] The technical solution adopted by this utility model is as follows: an electromagnetic negative pressure valve, including an electromagnetic valve control component, an electromagnetic valve body, a negative pressure valve body, and a negative pressure valve cover; The solenoid valve control assembly and the solenoid valve body are connected to form the first control valve chamber; The solenoid valve body and the negative pressure valve body are connected to form a second control valve chamber; The negative pressure valve body and the negative pressure valve cover are connected to form a third control valve chamber; The solenoid valve body is provided with an inlet pipe that connects to the first control valve chamber, and the negative pressure valve body is provided with an outlet pipe that connects to the third control valve chamber. The solenoid valve body is provided with a solenoid valve port for connecting the first control valve chamber and the second control valve chamber. The solenoid valve control component cooperates with the solenoid valve port to control the opening and closing of the solenoid valve port. The negative pressure valve body is provided with a negative pressure valve port for connecting the second control valve chamber and the third control valve chamber. The second control valve chamber is provided with a negative pressure valve plug and an elastic member for driving the negative pressure valve plug to press and close the negative pressure valve port. The third control valve chamber is equipped with a pneumatic diaphragm and a movable component. The pneumatic diaphragm isolates the third control valve chamber into a medium chamber and an atmospheric chamber. The medium chamber is connected to the negative pressure valve port and the water outlet pipe. The negative pressure valve cover is equipped with a vent that allows the atmospheric chamber to communicate with the outside air. The two ends of the movable component are respectively engaged with the pneumatic diaphragm and the negative pressure valve plug.

[0005] The central axis of the solenoid valve port is either coaxial with or parallel to the central axis of the negative pressure valve port.

[0006] The extension direction of the water inlet pipe is perpendicular to the central axis of the solenoid valve port; the extension direction of the water outlet pipe is perpendicular to the central axis of the negative pressure valve port; the solenoid valve body and the negative pressure valve body are detachably connected by a plurality of threaded fasteners evenly distributed around the circumference.

[0007] The solenoid valve body is provided with a plurality of connecting posts extending along the central axis of the solenoid valve port and evenly distributed at equal intervals. The bottom of the connecting post is provided with a first connecting hole. The negative pressure valve body is provided with a plurality of second connecting holes. The threaded fastener passes through the second connecting hole and extends into the first connecting hole to be threadedly connected to the connecting post. The water inlet pipe is located between two adjacent connecting posts, and the water outlet pipe is located between two adjacent second connecting holes.

[0008] The solenoid valve body has a base plate, and the upper surface of the base plate is provided with an upwardly extending first annular valve seat, the upper end of the first annular valve seat forming the solenoid valve port; the lower surface of the base plate is provided with a downwardly extending mating ring, the mating ring being inserted into the negative pressure valve body to form a plug-in fit, and a sealing ring being provided between the two; the center of the first annular valve seat and the center of the mating ring are connected to form a central flow channel.

[0009] The solenoid valve body has a spring limiting plate in the central flow channel. The outer peripheral wall of the spring limiting plate and the inner peripheral wall of the solenoid valve body are spaced apart by a certain distance and are connected by several evenly distributed connecting ribs to form several flow holes. The elastic member is a compression spring, the upper end of which abuts against the spring limiting plate. The lower end of the spring limiting plate has a positioning groove adapted to the elastic member. The connecting ribs extend towards the negative pressure valve port to form a limiting groove adapted to the outer periphery of the negative pressure valve plug.

[0010] The negative pressure valve body is provided with a second annular valve seat, the upper end of which forms a negative pressure valve port; the movable part is provided with a push rod that extends into the second annular valve seat.

[0011] The pneumatic diaphragm includes a telescopic part, a bending part, and a mounting part connected sequentially from the inside to the outside. The mounting part is located between the negative pressure valve body and the negative pressure valve cover. The bending part protrudes towards the negative pressure valve cover. The movable part is provided with a movable disc that cooperates with the telescopic part and a circular skirt extending into the bending part is formed on the outer periphery of the movable disc. The movable disc is provided with several through holes.

[0012] The inner surface of the negative pressure valve cover is provided with a vent keyway corresponding to the telescopic part, and a step is formed at the edge of the vent keyway. The vent is located at the step at the edge of the vent keyway.

[0013] The inlet and outlet water connectors are quick-connect straight-insertion connectors.

[0014] The beneficial effects of this utility model are as follows: This utility model combines a negative pressure valve with a solenoid valve to create a new combined valve, which perfectly solves the problem of leakage that may occur after long-term use of the negative pressure valve; the original negative pressure valve would still resonate under certain working conditions, which can be perfectly solved by combining the control of the solenoid valve; at the same time, a double confirmation and safety system is formed through mechanical control and electromagnetic control. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a cross-sectional view of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the solenoid valve body in one embodiment of the present invention; Figure 3 This is a cross-sectional view of the solenoid valve body in one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the negative pressure valve body in one embodiment of the present invention; Figure 5 This is a cross-sectional view of the negative pressure valve body in one embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the movable component in one embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the pneumatic diaphragm in one embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the negative pressure valve cover in one embodiment of the present invention; Figure 9This is a schematic diagram of a set of quick-connect straight-insertion pipes in one embodiment of the present invention; In the diagram, the components are: solenoid valve control assembly - 100, solenoid valve body - 200, inlet pipe - 210, solenoid valve port - 220, connecting post - 230, first connecting hole - 231, base plate - 240, first annular valve seat - 250, mating ring - 260, spring limiting plate - 270, positioning groove - 271, connecting rib - 280, flow hole - 290, negative pressure valve body - 300, outlet pipe - 310, negative pressure valve port - 320. Second connecting hole - 330, sealing ring - 340, second annular valve seat - 350, negative pressure valve cover - 400, vent - 410, vent keyway - 420, negative pressure valve plug - 510, elastic actuating element - 520, pneumatic diaphragm - 610, telescopic part - 611, bending part - 612, mounting part - 613, moving part - 620, top rod - 621, moving plate - 622, circular skirt - 623, through hole - 624.

[0017] First control valve chamber - A, second control valve chamber - B, third control valve chamber - C. Detailed Implementation

[0018] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0019] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0020] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0021] An electromagnetic negative pressure valve, such as Figure 1 , Figure 2 As shown, it includes a solenoid valve control assembly 100, a solenoid valve body 200, a negative pressure valve body 300, and a negative pressure valve cover 400.

[0022] The solenoid valve control component 100 and the solenoid valve body 200 are connected to form a solenoid valve unit. The solenoid valve control component 100 and the solenoid valve body 200 are connected to form a first control valve chamber A. The solenoid valve body 200 is provided with a water inlet pipe 210 connecting to the first control valve chamber A. The solenoid valve body 200 has a solenoid valve port 220 inside. The solenoid valve control component 100 cooperates with the solenoid valve port 220 to control the opening and closing of the solenoid valve port 220. The solenoid valve control component 100 includes components such as an electromagnetic coil, an iron core, and a sealing plug. The change in the electromagnetic field caused by the energization / de-energization of the electromagnetic coil drives the iron core to move the sealing plug, thereby blocking or removing the solenoid valve port 220. The solenoid valve control component 100 is a conventional structure in this field, therefore its specific structure will not be described in detail.

[0023] The solenoid valve body 200, the negative pressure valve body 300, and the negative pressure valve cover 400 are sequentially connected to form a negative pressure valve unit. The solenoid valve body 200 and the negative pressure valve body 300 are connected to form a second control valve chamber B. The solenoid valve port 220 is used to connect the first control valve chamber A and the second control valve chamber B. The negative pressure valve body 300 and the negative pressure valve cover 400 are connected to form a third control valve chamber C. The negative pressure valve body 300 is provided with a water outlet pipe 310 connecting to the third control valve chamber C. The negative pressure valve body 300 is provided with a negative pressure valve port 320 for connecting the second control valve chamber B and the third control valve chamber C. The second control valve chamber B is equipped with a negative pressure valve plug 510 corresponding to the negative pressure valve port 320, and an elastic member 520 that drives the negative pressure valve plug 510 to press and close the negative pressure valve port 320; the third control valve chamber C is equipped with a pneumatic diaphragm 610 and a movable member 620. The pneumatic diaphragm 610 isolates the third control valve chamber C into a medium chamber and an atmospheric chamber. The medium chamber is connected to the negative pressure valve port 320 and the water outlet pipe 310. The negative pressure valve cover 400 is equipped with a vent 410 that connects the atmospheric chamber to the outside air. The two ends of the movable member 620 are respectively engaged with the pneumatic diaphragm 610 and the negative pressure valve plug 510.

[0024] This application integrates a solenoid valve and a negative pressure valve into a single combined valve. The upstream solenoid valve controls the flow of water, while the downstream negative pressure valve controls the flow of water, ensuring that the pump draws out water at low or no pressure. The structure of this application forms a double-sealed inlet structure. The inlet solenoid valve needs to be energized to allow water flow into the second control valve chamber B of the negative pressure valve. Only when the water pump at the outlet operates, driving the moving part 620 to rise and open the negative pressure valve plug 510, can the water flow be unblocked. This perfectly solves the problem of leakage that may occur with prolonged use of the negative pressure valve; it also perfectly resolves the issue of resonance that may occur under certain operating conditions with the solenoid valve control; furthermore, it provides double-confirmation safety through mechanical and electromagnetic control.

[0025] Furthermore, the central axis of the solenoid valve port 220 is coaxial with or parallel to the central axis of the negative pressure valve port 320. In this embodiment, the central axis of the solenoid valve port 220 and the central axis of the negative pressure valve port 320 are coaxial.

[0026] Furthermore, the extension direction of the inlet pipe 210 is perpendicular to the central axis of the solenoid valve port 220; the extension direction of the outlet pipe 310 is perpendicular to the central axis of the negative pressure valve port 320; the solenoid valve body 200 and the negative pressure valve body 300 are detachably connected by a plurality of threaded fasteners evenly distributed around the circumference. Through the above structure, the solenoid valve body 200 and the negative pressure valve body 300 are detachable, and the solenoid valve body 200 and the negative pressure valve body 300 have multiple relative angle connection relationships, which can meet various complex application scenarios. In this embodiment, the solenoid valve body 200 and the negative pressure valve body 300 are connected by four threaded fasteners distributed at the four corners of a square, and the solenoid valve body 200 and the negative pressure valve body 300 have four relative angle connection relationships.

[0027] Specifically, such as Figure 2 , Figure 3 As shown, the outer periphery of the solenoid valve body 200 is provided with a plurality of connecting posts 230 extending along the central axis of the solenoid valve port 220 and evenly distributed at equal intervals. The bottom of each connecting post 230 is provided with a first connecting hole 231. Figure 4 As shown, the negative pressure valve body 300 is provided with a plurality of second connection holes 330. The threaded fastener passes through the second connection hole 330 and extends into the first connection hole 231 to be threadedly connected to the connecting post 230. The water inlet pipe 210 is located between two adjacent connecting posts 230, and the water outlet pipe 310 is located between two adjacent second connection holes 330.

[0028] Furthermore, such as Figure 2 , Figure 3As shown, the solenoid valve body 200 has a base plate 240, and the upper surface of the base plate 240 is provided with an upwardly extending first annular valve seat 250, the upper end of the first annular valve seat 250 forming a solenoid valve port 220; the lower surface of the base plate 240 is provided with a downwardly extending mating ring 260, the mating ring 260 is inserted into the negative pressure valve body 300 to form a plug-in fit, and a sealing ring 340 is provided between the two; the center of the first annular valve seat 250 and the center of the mating ring 260 are connected to form a central flow channel. The solenoid valve body 200 has a spring limiting plate 270 in the central flow channel. The outer peripheral wall of the spring limiting plate 270 is spaced apart from the inner peripheral wall of the solenoid valve body 200 and the two are connected by several evenly distributed connecting ribs 280, forming several flow holes 290. The elastic member 520 is a compression spring, and its upper end abuts against the spring limiting plate 270. The lower end of the spring limiting plate 270 has a positioning groove 271 adapted to the elastic member 520. The connecting ribs 280 extend towards the negative pressure valve port 320 to form a limiting groove adapted to the outer periphery of the negative pressure valve plug 510. In this embodiment, there are six connecting ribs 280, which are evenly distributed to form six flow holes 290, reducing the vertical impact force of the water flow.

[0029] like Figure 4 , Figure 5 As shown, the negative pressure valve body 300 is provided with a second annular valve seat 350, and the upper end of the second annular valve seat 350 forms a negative pressure valve port 320; as Figure 6 As shown, the movable part 620 is provided with a push rod 621 that extends into the second annular valve seat 350.

[0030] like Figure 7 As shown, the pneumatic diaphragm 610 includes a telescopic portion 611, a bending portion 612, and a mounting portion 613 connected sequentially from the inside to the outside. The mounting portion 613 is located between the negative pressure valve body 300 and the negative pressure valve cover 400. The bending portion 612 protrudes towards the negative pressure valve cover 400. The movable member 620 is provided with a movable disc 622 that cooperates with the telescopic portion 611, and a circular skirt 623 extending into the bending portion 612 is formed on the outer periphery of the movable disc 622. The movable disc 622 is provided with several through holes 624. The circular skirt 623 on the outer periphery of the movable disc 622 is designed to match the diaphragm groove to reduce the impact of water flow. The addition of four through holes 624 on the movable disc 622 as water passage holes can reduce noise and vibration caused by water pressure.

[0031] like Figure 8 As shown, the inner surface of the negative pressure valve cover 400 is provided with a vent keyway 420 corresponding to the telescopic part 611, and a step is formed at the edge of the vent keyway 420. The vent 410 is located at the step at the edge of the vent keyway 420 to meet the market demand for low noise.

[0032] The inlet pipe 210 and outlet pipe 310 are quick-connect straight-insertion pipes, which are convenient for connection to pipelines. The structure of the quick-connect straight-insertion pipe is as follows: Figure 9 As shown, the inserted pipe is held in place by an elastic clamping element, which is a conventional structure in this field, so the specific structure will not be described in detail.

[0033] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An electromagnetic negative pressure valve, characterized in that, Includes a solenoid valve control assembly (100), a solenoid valve body (200), a negative pressure valve body (300), and a negative pressure valve cover (400). The solenoid valve control assembly (100) and the solenoid valve body (200) are connected to form a first control valve chamber (A); The solenoid valve body (200) and the negative pressure valve body (300) are connected to form a second control valve chamber (B); The negative pressure valve body (300) and the negative pressure valve cover (400) are connected to form a third control valve chamber (C); The solenoid valve body (200) is provided with an inlet pipe (210) that connects to the first control valve chamber (A), and the negative pressure valve body (300) is provided with an outlet pipe (310) that connects to the third control valve chamber (C). The solenoid valve body (200) is provided with a solenoid valve port (220) for connecting the first control valve chamber (A) and the second control valve chamber (B). The solenoid valve control assembly (100) cooperates with the solenoid valve port (220) to control the opening and closing of the solenoid valve port (220). The negative pressure valve body (300) is provided with a negative pressure valve port (320) for connecting the second control valve chamber (B) and the third control valve chamber (C). The second control valve chamber (B) is provided with a negative pressure valve plug (510) corresponding to the negative pressure valve port (320) and an elastic member (520) for driving the negative pressure valve plug (510) to press against and close the negative pressure valve port (320). The third control valve chamber (C) is provided with a pneumatic diaphragm (610) and a movable part (620). The pneumatic diaphragm (610) isolates the third control valve chamber (C) into a medium chamber and an atmospheric chamber. The medium chamber is connected to the negative pressure valve port (320) and the water outlet pipe (310). The negative pressure valve cover (400) is provided with a vent (410) that connects the atmospheric chamber to the outside air. The two ends of the movable part (620) are respectively engaged with the pneumatic diaphragm (610) and the negative pressure valve plug (510).

2. The electromagnetic negative pressure valve according to claim 1, characterized in that: The central axis of the solenoid valve port (220) is coaxial with or parallel to the central axis of the negative pressure valve port (320).

3. The electromagnetic negative pressure valve according to claim 2, characterized in that: The extension direction of the water inlet pipe (210) is perpendicular to the central axis of the solenoid valve port (220); the extension direction of the water outlet pipe (310) is perpendicular to the central axis of the negative pressure valve port (320); the solenoid valve body (200) and the negative pressure valve body (300) are detachably connected by a plurality of threaded fasteners evenly distributed around the circumference.

4. The electromagnetic negative pressure valve according to claim 3, characterized in that: The outer periphery of the solenoid valve body (200) is provided with a plurality of connecting posts (230) extending along the central axis of the solenoid valve port (220) and evenly distributed at equal intervals. The bottom of the connecting post (230) is provided with a first connecting hole (231). The negative pressure valve body (300) is provided with a plurality of second connecting holes (330). The threaded fastener passes through the second connecting hole (330) and extends into the first connecting hole (231) to be threadedly connected to the connecting post (230). The water inlet pipe (210) is located between two adjacent connecting posts (230), and the water outlet pipe (310) is located between two adjacent second connecting holes (330).

5. The electromagnetic negative pressure valve according to claim 1, characterized in that: The solenoid valve body (200) has a base plate (240), and the upper surface of the base plate (240) is provided with an upwardly extending first annular valve seat (250), the upper end of the first annular valve seat (250) forming a solenoid valve port (220); the lower surface of the base plate (240) is provided with a downwardly extending mating ring (260), the mating ring (260) is inserted into the negative pressure valve body (300) to form a plug-in fit and a sealing ring (340) is provided between the two; the center of the first annular valve seat (250) and the center of the mating ring (260) are connected to form a central flow channel.

6. The electromagnetic negative pressure valve according to claim 5, characterized in that: The solenoid valve body (200) has a spring limiting plate (270) in the central flow channel. The outer peripheral wall of the spring limiting plate (270) and the inner peripheral wall of the solenoid valve body (200) are separated by a certain distance and are connected by a number of evenly distributed connecting ribs (280) to form a number of flow holes (290). The elastic member (520) is a compression spring, and its upper end abuts against the spring limiting plate (270). The lower end of the spring limiting plate (270) has a positioning groove (271) adapted to the elastic member (520). The connecting ribs (280) extend toward the negative pressure valve port (320) to form a limiting groove adapted to the outer periphery of the negative pressure valve plug (510).

7. The electromagnetic negative pressure valve according to claim 1, characterized in that: The negative pressure valve body (300) is provided with a second annular valve seat (350), the upper end of which forms a negative pressure valve port (320); the movable part (620) is provided with a push rod (621) extending into the second annular valve seat (350).

8. The electromagnetic negative pressure valve according to claim 7, characterized in that: The pneumatic diaphragm (610) includes a telescopic part (611), a bending part (612), and a mounting part (613) connected sequentially from the inside to the outside. The mounting part (613) is located between the negative pressure valve body (300) and the negative pressure valve cover (400). The bending part (612) protrudes towards the negative pressure valve cover (400). The movable part (620) is provided with a movable disc (622) that cooperates with the telescopic part (611) and a circular skirt (623) extending into the bending part (612) is formed on the outer periphery of the movable disc (622). The movable disc (622) is provided with a plurality of through holes (624).

9. The electromagnetic negative pressure valve according to claim 8, characterized in that: The inner surface of the negative pressure valve cover (400) is provided with a vent keyway (420) at a position corresponding to the telescopic part (611), and a step is formed at the edge of the vent keyway (420). The vent (410) is located at the step at the edge of the vent keyway (420).

10. The electromagnetic negative pressure valve according to any one of claims 1-9, characterized in that: The inlet pipe (210) and outlet pipe (310) are quick-connect straight-insertion pipes.

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