Micro valve

Abstract

The micro valve comprises a shell, a driving mechanism, a water outlet pressing plate, a membrane and a water outlet seat, the driving mechanism, the water outlet pressing plate, the membrane and the water outlet seat are sequentially arranged in the shell from top to bottom, a water outlet channel and a first pressure relief channel are arranged on the water outlet seat, a water inlet cavity is formed between the water outlet seat and the membrane, and a first pressure preparation cavity is formed between a membrane assembly and the water outlet pressing plate. A second pressure preparing cavity is formed between the water outlet pressing disc and the driving mechanism, the diaphragm is provided with a water retaining disc in a penetrating mode, a spring with a needle is arranged between the water retaining disc and the water outlet pressing disc, and the water retaining disc is provided with a first pressure boosting hole used for communicating the water inlet cavity with the first pressure preparing cavity. The water outlet pressing plate is provided with a second pressure boosting hole used for communicating the first pressure preparation cavity with the second pressure preparation cavity and a second pressure relief channel used for communicating the second pressure preparation cavity with the first pressure relief channel, and the output end of the driving mechanism is connected with silica gel particles. The utility model has the advantages of smaller size, convenience in installation, strong product firmness and performance stability, and convenience in product assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a micro valve. Background Art

[0002] At present, with the rapid development of electronic technology, the water supply equipment, water supply accessories, water supply pipelines, etc. in the drinking water and water purification industries all involve the needs of diversification and simplification; moreover, with the continuous development of water supply and water control pipelines, the requirements for the flow rate of solenoid valves are getting higher and higher, which makes the requirements for miniaturization of the external dimensions of solenoid valves more and more urgent.

[0003] Micro valves are suitable for electronically controlled water supply equipment, and can also be used as induction water valves in public facilities or homes. The basic structure and working principle of the micro valves currently available on the market are basically the same. The micro valve structure consists of a coil cover, a coil housing, a coil assembly (coil skeleton, enameled wire, two-core waterproof plug, insulating tape), a U-shaped frame, a coil spring, a moving iron core assembly (moving iron core, silica gel particles), an iron sheet, a static iron core, a variety of O-rings, a water pressure plate, a filter plate, a needle spring, a sealing ring assembly (water retaining plate, sealing ring), a water outlet seat, a filter screen, and epoxy resin. However, the existing micro valves still have the following defects: 1. The body is large and not easy to install; 2. The one-time qualified rate of performance is low; 3. The size of the components needs to be detected and debugged during assembly, which is labor-intensive and time-consuming. Utility Model Content

[0004] The purpose of the utility model is to provide a micro valve, which is not only smaller in size and easy to install, but also has strong product firmness and performance stability, and is also very convenient to assemble.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a micro valve, including a shell and a driving mechanism, a water outlet pressure plate, a diaphragm, and a water outlet seat arranged in the shell from top to bottom, the outer periphery of the water outlet pressure plate and the outer periphery of the water outlet seat are respectively provided with a first sealing ring and a second sealing ring for forming a sealing match with the inner wall of the shell, the water outlet seat is provided with a water outlet channel and a pressure relief channel, a water inlet cavity is provided between the water outlet seat and the diaphragm, a backup pressure cavity is provided between the diaphragm assembly and the water outlet pressure plate, and a pressure relief cavity is provided between the water outlet pressure plate and the driving mechanism. A second standby pressure chamber is provided, a water retaining plate is provided through the diaphragm, a spring with a needle is provided between the water retaining plate and the water outlet pressure plate for pressing the diaphragm against the inner end of the water outlet channel, a boosting hole is provided on the water retaining plate for connecting the water inlet chamber and the first standby pressure chamber, a boosting hole is provided on the water outlet pressure plate for connecting the first standby pressure chamber with the second standby pressure chamber and a second pressure relief channel for connecting the second standby pressure chamber with the first pressure relief channel, the output end of the driving mechanism is connected to silica gel particles, and the driving mechanism drives the silica gel particles downward to block the second pressure relief channel or upward to conduct the second pressure relief channel.

[0006] The utility model is further configured as follows: the driving mechanism includes a coil frame, an enameled wire, a static iron core, a coil spring and a moving iron core, the enameled wire is wound on the coil frame, the static iron core is riveted to the center of the coil frame, the moving iron core is slidably arranged below the static iron core, the coil spring is arranged between the static iron core and the moving iron core, and the silicone particles are arranged on the moving iron core.

[0007] The utility model is further configured that the driving mechanism also includes a magnet, and the magnet is arranged at a position below the coil frame corresponding to the enameled wire.

[0008] The utility model is further configured that the water outlet pressure plate is provided with a barb-shaped buckle, and the coil skeleton is provided with a clamping groove matched with the barb-shaped buckle.

[0009] The utility model is further configured such that a first annular positioning groove is provided at the lower end of the water outlet pressure plate, a second annular positioning groove is provided at the upper end of the water outlet seat, and the outer edge of the diaphragm extends upward and downward and is respectively embedded in the first annular positioning groove and the second annular positioning groove.

[0010] The utility model is further configured such that a plurality of blocks are provided on the outer periphery of the water outlet seat, a plurality of bayonet holes matching with the blocks are provided on the outer shell, a plurality of positioning protrusions are provided on the upper and lower ends of the water outlet seat, and a plurality of positioning grooves matching with the positioning protrusions are provided on the lower end of the outer shell.

[0011] The utility model is further configured that the outer periphery of the water outlet seat is provided with an annular channel 1 and a docking groove 1 which is connected to the annular channel 1 and extends upward, the outer periphery of the water outlet pressure plate is provided with an annular channel 2 and a docking groove 2 which is connected to the annular channel 2 and extends downward, the docking groove 1 is connected to the docking groove 2, the pressure relief channel 1 is connected to the annular channel 1, and the pressure relief channel 2 is connected to the annular channel 2.

[0012] The utility model is further configured that a plurality of positioning protrusions are provided at the upper end of the water outlet seat, and a plurality of positioning recesses are provided at the lower end of the water outlet pressure plate.

[0013] The utility model is further configured to further include a filter sheet, wherein the filter sheet is pressed against the lower end surface of the water outlet pressure plate by a needle spring.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the entire appearance structure of the utility model is reduced, which is convenient for installation and has a wide range of applications; its static iron core adopts riveting type, which increases the firmness and performance stability of the product; the driving mechanism, water outlet pressure plate and water outlet seat adopt hanging buckle structure, which is convenient for product assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A cross-sectional view of the utility model as a whole;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model after adding magnets;

[0017] Figure 3 It is a cross-sectional view from the first direction of the matching structure of the water outlet pressure plate, the diaphragm and the water outlet seat of the utility model;

[0018] Figure 4 It is a cross-sectional view from the second direction of the matching structure of the water outlet pressure plate, the diaphragm and the water outlet seat of the utility model;

[0019] Figure 5 It is a schematic diagram of the overall appearance structure of the utility model;

[0020] Figure 6 The figure is a schematic diagram of the appearance structure of the water outlet pressure plate and the diaphragm of the utility model.

[0021] In the figure: 1, housing; 2, driving mechanism; 3, water outlet pressure plate; 4, diaphragm; 5, water outlet seat; 6, first sealing ring; 7, second sealing ring; 8, water outlet channel; 9, pressure relief channel 1; 10, water inlet chamber; 11, standby pressure chamber 1; 12, standby pressure chamber 2; 13, water retaining plate; 14, spring with needle; 15, boost hole 1; 16, boost hole 2; 17, pressure relief channel 2; 18, silica gel particles; 19, coil skeleton; 20. Enameled wire; 21. Static iron core; 22. Coil spring; 23. Moving iron core; 24. Magnet; 25. Barbed buckle; 26. Slot; 27. First annular positioning groove; 28. Second annular positioning groove; 29. ​​Block; 30. Bayonet; 31. Positioning protrusion; 32. Positioning groove; 33. Annular channel one; 34. Docking groove one; 35. Annular channel two; 36. Docking groove two; 37. Positioning protrusion; 38. Positioning recess; 39. Filter. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example: As attached Figures 1 to 6A micro valve shown in the figure comprises a housing 1 and a driving mechanism 2, a water outlet pressure plate 3, a diaphragm 4 and a water outlet seat 5 which are sequentially arranged in the housing 1 from top to bottom. The outer periphery of the water outlet pressure plate 3 and the outer periphery of the water outlet seat 5 are respectively provided with a first sealing ring 6 and a second sealing ring 7 for forming a sealing match with the inner wall of the housing 1. The water outlet seat 5 is provided with a water outlet channel 8 and a pressure relief channel 9, wherein the pressure relief channel 9 extends radially to connect the outer side of the water outlet seat 5 with the water outlet channel 8. A water inlet cavity 10 is provided between the water outlet seat 5 and the diaphragm 4, a backup pressure cavity 11 is provided between the diaphragm 4 assembly and the water outlet pressure plate 3, a backup pressure cavity 2 12 is provided between the water outlet pressure plate 3 and the driving mechanism 2, and a water retaining plate 13 is provided through the diaphragm 4 A needle spring 14 is arranged between the water retaining plate 13 and the water outlet pressure plate 3 for pressing the diaphragm 4 against the inner end of the water outlet channel 8, a boosting hole 15 is arranged on the water retaining plate 13 for connecting the water inlet chamber 10 with the standby pressure chamber 1 11, a boosting hole 2 16 is arranged on the water outlet pressure plate 3 for connecting the standby pressure chamber 1 11 with the standby pressure chamber 2 12, and a pressure relief channel 2 17 is arranged on the water outlet pressure plate 3 for connecting the standby pressure chamber 1 11 with the standby pressure chamber 2 12 and a pressure relief channel 1 9, wherein the pressure relief channel 17 has a vertical channel section arranged at the center of the water outlet pressure plate 3 and a radial channel section extending radially, and a silica gel particle 18 is connected to the output end of the driving mechanism 2, and the driving mechanism 2 drives the silica gel particle 18 to block the pressure relief channel 2 17 downward or to conduct the pressure relief channel 17 upward.

[0024] The driving mechanism 2 has the following two forms:

[0025] The first is electromagnetic drive: Figure 1 As shown, the driving mechanism 2 includes a coil frame 19, an enameled wire 20, a static iron core 21, a coil spring 22 and a moving iron core 23. The enameled wire 20 is wound on the coil frame 19, the static iron core 21 is riveted to the center of the coil frame 19, the moving iron core 23 is slidably arranged under the static iron core 21, the coil spring 22 is arranged between the static iron core 21 and the moving iron core 23, and the silicone particles 18 are arranged on the moving iron core 23.

[0026] The second type is pulse drive: Figure 2 As shown, specifically, on the basis of electromagnetic drive, a magnet 24 is added, which can reduce energy consumption during operation. The magnet 24 is arranged at a position below the coil frame 19 corresponding to the enameled wire 20.

[0027] As attached Figure 1 As shown, the water outlet pressure plate 3 is provided with a barbed hook buckle 25, and the coil frame 19 is provided with a slot 26 matched with the barbed hook buckle 25. The two are matched with each other, the connection structure is simple and reliable, and the disassembly and assembly are very convenient.

[0028] As attached Figure 3As shown, a first annular positioning groove 27 is provided at the lower end of the water outlet pressure plate 3, and a second annular positioning groove 28 is provided at the upper end of the water outlet seat 5. The outer edge of the diaphragm 4 extends upward and downward and is respectively embedded in the first annular positioning groove 27 and the second annular positioning groove 28, thereby realizing the positioning and installation of the diaphragm 4, which is not only firmly installed but also has good sealing performance.

[0029] As attached Figure 5 As shown, the outer periphery of the water outlet seat 5 is provided with a plurality of blocks 29, the upper ends of the blocks 29 are inclined surfaces, the outer shell 1 is provided with a plurality of bayonet holes 30 matched with the blocks 29, and the upper and lower ends of the water outlet seat 5 are also provided with a plurality of positioning protrusions 31, and the lower end of the outer shell 1 is provided with a plurality of positioning grooves 32 matched with the positioning protrusions 31, so as to realize the quick matching installation of the water outlet seat 5 and the outer shell 1.

[0030] As attached Figure 6 As shown, the outer periphery of the water outlet seat 5 is provided with an annular channel 1 33 and a docking groove 1 34 connected to the annular channel 1 33 and extending upward, the outer periphery of the water outlet pressure plate 3 is provided with an annular channel 2 35 and a docking groove 2 36 connected to the annular channel 2 35 and extending downward, the docking groove 1 34 is connected to the docking groove 2 36, the pressure relief channel 1 9 is connected to the annular channel 1 33, and the pressure relief channel 2 17 is connected to the annular channel 2 35.

[0031] As attached Figure 6 As shown, the upper end of the water outlet seat 5 is provided with a plurality of positioning protrusions 37, and the lower end of the water outlet pressure plate 3 is provided with a plurality of positioning recesses 38. The positioning structure is provided to ensure that when the water outlet seat 5 is connected with the water outlet pressure plate 3, the docking groove 1 34 and the docking groove 2 36 can be accurately docked to achieve conduction.

[0032] As attached Figure 1 As shown, a filter sheet 39 is also included. The filter sheet 39 is pressed against the lower end surface of the water outlet pressure plate 3 by a needle spring 14. The filter sheet 39 can filter large particle media in the fluid to protect the valve.

[0033] Working principle:

[0034] Micro solenoid valve: When the micro solenoid valve drive mechanism 2 is powered on, the moving iron core 23 moves upward under the action of the electromagnetic field suction force. At this time, the pressure relief channel 2 17 on the water outlet pressure plate 3 is opened, and the liquid flows out from the pressure relief channel 2 17 through the pressure relief channel 1 9 on the water outlet seat 5. After the micro valve is depressurized, the pressure in the backup pressure chamber 11 and the backup pressure chamber 2 12 is less than the pressure in the water inlet chamber 10. At this time, the water retaining plate 13 and the diaphragm 4 are lifted upward under the action of the water inlet pressure, and the liquid flows out through the water outlet channel 8 of the water outlet seat 5. At this time, the micro valve is in working condition. On the contrary, when the microvalve drive mechanism 2 is powered off, the magnetic field force of the electromagnetic coil disappears, and the moving iron core 23 moves downward under the action of its own gravity and spring force. At this time, the end face of the silica gel particles 18 on the moving iron core 23 is in close contact with the end face of the pressure relief channel 2 17 on the water outlet pressure plate 3, and the pressure relief channel 2 17 is in a closed state. The liquid continuously flows into the standby pressure chamber 11 from the pressure boosting hole 15 of the water retaining plate 13, and then flows into the standby pressure chamber 2 12 from the pressure boosting hole 2 16 on the water outlet pressure plate 3. Because the pressure relief hole and pressure relief channel 2 17 on the water outlet pressure plate 3 are closed, the pressure cannot be relieved. In theory, the water pressures of the water inlet chamber 10, the standby pressure chamber 1 11, and the standby pressure chamber 2 12 are consistent, and because there is spring elastic force, the self-gravity of the moving iron core 23 and the silica gel particles 18 in the standby pressure chamber 2 12, the water retaining plate 13 and the diaphragm 4 cannot be opened by the impact of the water inlet pressure. At this time, the microvalve is in a stopped state (non-working state).

[0035] Micro pulse valve: After the positive voltage is applied to the micro pulse valve, the moving iron core 23 moves upward under the action of the electromagnetic field attraction and the magnet 24. After the power is turned on, the power is immediately cut off, and the moving iron core 23 is still under the action of the magnetic attraction of the magnet 24, and the moving iron core 23 will not move downward. At this time, the pressure relief channel 2 17 on the water outlet pressure plate 3 is opened, and the liquid flows out from the pressure relief channel 2 17 through the pressure relief channel 1 9 on the water outlet seat 5. After the micro pulse valve is depressurized, the pressure in the standby pressure chamber 1 11 and the standby pressure chamber 2 12 is less than the pressure in the water inlet chamber 10. At this time, the water retaining plate 13 and the diaphragm 4 are lifted upward under the action of the water inlet pressure, and the liquid flows out through the water outlet channel 8 of the water outlet seat 5. At this time, the micro pulse valve is in working condition. On the contrary, when a negative voltage is applied to the micro-pulse valve again, the magnetic field force of the magnet 24 disappears, and the moving iron core 23 moves downward under the action of its own gravity and spring force. At this time, the end face of the silica gel particles 18 on the moving iron core 23 is in close contact with the end face of the pressure relief channel 2 17 on the water outlet pressure plate 3, and the pressure relief channel 2 17 is in a closed state. Liquid continuously flows into the standby pressure chamber 11 from the pressure boosting hole 15 of the water retaining plate 13, and then flows into the standby pressure chamber 2 12 from the pressure boosting hole 2 16 on the water outlet pressure plate 3. Because the pressure relief hole and pressure relief channel 2 17 on the water outlet pressure plate 3 are closed, pressure relief cannot be achieved. In theory, the water pressures of the water inlet chamber 10, the standby pressure chamber 1 11, and the standby pressure chamber 2 12 are consistent, and because there is spring elasticity, the self-gravity of the moving iron core 23 and the silica gel particles 18 in the standby pressure chamber 2 12, the water retaining plate 13 and the diaphragm 4 cannot be opened by the impact of the water inlet pressure. At this time, the micro-pulse valve is in a stopped state (non-working state).

Claims

1. A micro valve, characterized in that: The invention comprises a housing (1) and a driving mechanism (2), a water outlet pressure plate (3), a diaphragm (4), and a water outlet seat (5) which are sequentially arranged in the housing (1) from top to bottom. The outer periphery of the water outlet pressure plate (3) and the outer periphery of the water outlet seat (5) are respectively provided with a first sealing ring (6) and a second sealing ring (7) for forming a sealing match with the inner wall of the housing (1). The water outlet seat (5) is provided with a water outlet channel (8) and a pressure relief channel (9). A water inlet chamber (10) is provided between the water outlet seat (5) and the diaphragm (4). A backup pressure chamber (11) is provided between the diaphragm (4) assembly and the water outlet pressure plate (3). A backup pressure chamber (12) is provided between the water outlet pressure plate (3) and the driving mechanism (2). A water retaining plate is provided through the diaphragm (4). (13), a spring with a needle (14) for pressing the diaphragm (4) against the inner end of the water outlet channel (8) is arranged between the water retaining plate (13) and the water outlet pressure plate (3), a pressure boosting hole (15) for connecting the water inlet chamber (10) and the standby pressure chamber (11) is arranged on the water retaining plate (13), a pressure boosting hole (16) for connecting the standby pressure chamber (11) and the standby pressure chamber (12) is arranged on the water outlet pressure plate (3), and a pressure relief channel (17) for connecting the standby pressure chamber (12) and the pressure relief channel (9) is arranged on the water outlet pressure plate (3), and a silica gel particle (18) is connected to the output end of the driving mechanism (2), and the driving mechanism (2) drives the silica gel particle (18) to move downward to block the pressure relief channel (17) or to move upward to conduct the pressure relief channel (17).

2. A micro valve according to claim 1, characterized in that: The driving mechanism (2) comprises a coil frame (19), an enameled wire (20), a static iron core (21), a coil spring (22) and a moving iron core (23); the enameled wire (20) is wound on the coil frame (19); the static iron core (21) is riveted to the center of the coil frame (19); the moving iron core (23) is slidably arranged below the static iron core (21); the coil spring (22) is arranged between the static iron core (21) and the moving iron core (23); and the silica gel particles (18) are arranged on the moving iron core (23).

3. A micro valve according to claim 2, characterized in that: The driving mechanism (2) further comprises a magnet (24), wherein the magnet (24) is arranged at a position below the coil frame (19) corresponding to the enameled wire (20).

4. A micro valve according to claim 2 or 3, characterized in that: The water outlet pressure plate (3) is provided with a barbed hook-shaped buckle (25), and the coil frame (19) is provided with a clamping groove (26) matching with the barbed hook-shaped buckle (25).

5. A micro valve according to claim 4, characterized in that: The lower end of the water outlet pressure plate (3) is provided with a first annular positioning groove (27), the upper end of the water outlet seat (5) is provided with a second annular positioning groove (28), and the outer edge of the diaphragm (4) extends upward and downward and is respectively embedded in the first annular positioning groove (27) and the second annular positioning groove (28).

6. A micro valve according to claim 5, characterized in that: The outer periphery of the water outlet seat (5) is provided with a plurality of clamping blocks (29), the outer shell (1) is provided with a plurality of clamping ports (30) matched with the clamping blocks (29), and the upper and lower ends of the water outlet seat (5) are also provided with a plurality of positioning protrusions (31), and the lower end of the outer shell (1) is provided with a plurality of positioning grooves (32) matched with the positioning protrusions (31).

7. A micro valve according to claim 1, characterized in that: The outer periphery of the water outlet seat (5) is provided with an annular channel 1 (33) and a docking groove 1 (34) which is connected to the annular channel 1 (33) and extends upwards; the outer periphery of the water outlet pressure plate (3) is provided with an annular channel 2 (35) and a docking groove 2 (36) which is connected to the annular channel 2 (35) and extends downwards; the docking groove 1 (34) is connected to the docking groove 2 (36); the pressure relief channel 1 (9) is connected to the annular channel 1 (33); and the pressure relief channel 2 (17) is connected to the annular channel 2 (35).

8. A micro valve according to claim 7, characterized in that: The upper end of the water outlet seat (5) is provided with a plurality of positioning protrusions (37), and the lower end of the water outlet pressure plate (3) is provided with a plurality of positioning recesses (38).

9. The micro valve according to claim 1, characterized in that: It also includes a filter sheet (39), which is pressed against the lower end surface of the water outlet pressure plate (3) through a needle spring (14).

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