CN220850958U

CN220850958U - Normally open valve

Info

Publication number: CN220850958U
Application number: CN202322694710.6U
Authority: CN
Inventors: 杨晓明; 华志康
Original assignee: Hangzhou Kambayashi Electronics Co Ltd
Current assignee: Hangzhou Kambayashi Electronics Co Ltd
Priority date: 2023-09-28
Filing date: 2023-09-28
Publication date: 2024-04-26
Anticipated expiration: 2033-09-28

Abstract

The utility model discloses a normally open valve, which comprises a valve seat, an electromagnetic assembly, a diaphragm assembly, a return spring, a piston assembly, a guide cylinder and a positioning plug, wherein the guide cylinder is fixed on the valve seat and is provided with an iron core for supplying the electromagnetic assembly and a movable channel for sliding the piston assembly, the diaphragm assembly is positioned between a back pressure cavity, a water inlet cavity and a water outlet cavity of the valve seat, the electromagnetic assembly can utilize the iron core to drive the piston assembly to be close to the diaphragm assembly and adjust the pressure of the back pressure cavity so as to cut off a passage between the water inlet cavity and the water outlet cavity when being electrified, the return spring has an elastic trend of pulling the piston assembly to return to the original position in a natural state, and the guide cylinder and the positioning plug can be clamped by a clamping structure during outage and enable the piston assembly to be retracted into the movable channel, so that the positioning plug is not easy to fall off, and can be normally started and stopped in a failure state.

Description

Normally open valve

[ Field of technology ]

The utility model relates to the technical field of normally open valves, in particular to the technical field of normally open valves.

[ Background Art ]

With the continuous improvement of the living standard of people, water use or water treatment appliances in offices, business places and families are also becoming popular, such as water purifiers, water storage type water heaters, dish washers, washing machines and the like. The normally open valve is a solenoid valve which is characterized in that the normally open valve is closed when the coil is electrified and is opened after the coil is deenergized. For water or water treatment appliances, normally open valves are required to be fitted if the piping needs to remain open for years and occasionally closed.

For conventional normally open valves, the piston assembly is typically plugged into the guide channel of the guide cylinder during a coil outage using a locating plug that can be interference fit with the guide cylinder. However, with the increase of service life and vibration, when the coil is powered off, the positioning plug may not keep an interference fit state with the guide cylinder, and cause abnormal blockage of the diaphragm assembly after the positioning plug is separated from the guide cylinder, so that the normally open valve is finally caused to be incapable of working normally.

[ utility model ]

The utility model aims to solve the problems in the prior art, and provides a normally open valve which is not only difficult to fall off a positioning plug, but also can be normally started and stopped in a failure state.

In order to achieve the above purpose, the utility model provides a normally open valve, which comprises a valve seat, an electromagnetic assembly, a diaphragm assembly, a return spring, a piston assembly, a guide cylinder and a positioning plug, wherein the guide cylinder is fixed on the valve seat and is provided with an iron core capable of supplying the electromagnetic assembly and a movable channel for sliding of the piston assembly, the diaphragm assembly is positioned between a back pressure cavity, a water inlet cavity and a water outlet cavity of the valve seat, the electromagnetic assembly can utilize the iron core to drive the piston assembly to be close to the diaphragm assembly and adjust the pressure of the back pressure cavity so as to cut off a passage between the water inlet cavity and the water outlet cavity when the electromagnetic assembly is electrified, the return spring has an elastic trend of pulling the piston assembly to return to the original position in a natural state, and the guide cylinder and the positioning plug can be clamped through a clamping structure during power failure and enable the piston assembly to be retracted into the movable channel.

Preferably, the discharge hole of the movable channel is surrounded by a plurality of chucks, the positioning plug comprises a plug disc, the plug disc is fixed with the piston assembly, and the outer edge of the plug disc is surrounded by a plurality of chucks which can be respectively clamped with the chucks.

Preferably, a plurality of supporting protruding points are arranged around one side of the plug disc, which faces the diaphragm assembly, and water gaps can still be reserved between the plug disc and the diaphragm assembly when the supporting protruding points respectively contact the diaphragm assembly.

Preferably, a plug cylinder is arranged on one side of the plug disc, which is away from the diaphragm assembly, and can be plugged into the movable channel.

Preferably, the outer edge of the plug cylinder is provided with a plurality of first ribs in a surrounding mode, and the positioning plug can be in interference connection with the guide cylinder through each first rib.

Preferably, the piston assembly comprises a piston rod and a piston cap, one end of the piston rod is propped against the iron core, the other end of the piston rod is fixed with the piston cap and forms a step part, a narrowing part which can prop against the step part is arranged at the free end of the piston cylinder, and the return spring is sleeved outside the piston rod, and the two ends of the return spring are respectively fixed with the piston rod and the positioning plug.

Preferably, when the guide cylinder falls off, the distance d1 between the piston cap and the diaphragm assembly is more than 0.95mm, and the distance d4 between the iron core and the lower sleeve of the electromagnetic assembly is less than or equal to +/-1 mm; during power failure, the distance d2 between the iron core and the lower sleeve of the electromagnetic assembly is 1-2 mm, and the difference between the distance d3 between the piston cap and the diaphragm assembly and the distance d2 between the iron core and the lower sleeve of the electromagnetic assembly is less than or equal to 0.5mm.

Preferably, the piston rod is provided with an inner concave part at the rod wall, and the piston cap is covered outside the piston rod and is provided with an inner convex part extending into the inner concave part.

Preferably, one end of the movable channel is closed by a sealing plate, the other end of the movable channel is provided with an annular convex edge extending outwards, and each clamping head is positioned on the annular convex edge.

Preferably, the outer edge of the annular convex edge is provided with an annular flanging turned towards one side far away from the sealing plate, a plurality of second convex edges are arranged on the outer wall of the annular flanging in a surrounding mode, and the guide cylinder can be in interference connection with the valve seat through the second convex edges.

The utility model has the beneficial effects that:

1) By additionally arranging the clamping structure, the guide cylinder and the positioning plug are clamped during power failure, and compared with the traditional guide cylinder and the positioning plug which are in interference fit, the connecting stability is stronger, and the problem that a valve cannot be opened due to the fixing failure of the positioning plug is difficult to occur;

2) The clamping heads are arranged around the discharge hole of the movable channel of the guide cylinder, and the clamping openings which are respectively matched with the clamping heads are additionally arranged at the outer edge of the plug disc of the positioning plug, so that the clamping structure is formed by the clamping heads and the clamping openings corresponding to the groups, the structure is simple, the processing is easy, and the clamping smoothness is good;

3) Through add a plurality of and prop the bump in stopper dish towards one side of diaphragm subassembly, even if when the location stopper drops, still available each supports bump and puts up the location stopper, avoids the location stopper to cause the shutoff to the diaphragm subassembly, keeps the pressure stability in backpressure chamber to make the normally open valve still lift up at the location stopper failure mode under, through specially designed return spring and the initial position of iron core, can guarantee normally open valve and open under the unchangeable prerequisite of water pressure and stop.

The features and advantages of the present utility model will be described in detail by way of example with reference to the accompanying drawings.

[ Description of the drawings ]

FIG. 1 is a schematic perspective view of a normally open valve of the present utility model;

FIG. 2 is a cross-sectional view of a normally open valve of the present utility model;

FIG. 3 is a schematic perspective view of a normally open valve guide of the present utility model;

FIG. 4 is a cross-sectional view of the guide cylinder of the normally open valve of the present utility model;

FIG. 5 is a schematic perspective view of a positioning plug of the normally open valve of the present utility model;

FIG. 6 is a front view of a pilot plug of the normally open valve of the present utility model;

FIG. 7 is a schematic illustration of the normal operation of the normally open valve of the present utility model;

FIG. 8 is an enlarged schematic view at A of FIG. 7;

FIG. 9 is a schematic illustration of the operation of the normally open valve of the present utility model in a disabled condition;

fig. 10 is an enlarged schematic view at B of fig. 9.

In the figure: 1-valve seat, 11-back pressure chamber, 12-water inlet chamber, 13-water outlet chamber, 2-electromagnetic component, 21-iron core, 3-diaphragm component, 31-diaphragm plate, 311-water outlet hole, 32-diaphragm plate, 4-return spring, 5-piston component, 51-piston rod, 511-concave part, 52-piston cap, 521-inner convex part, 6-guide tube, 61-movable channel, 62-chuck, 63-annular convex edge, 64-annular flanging, 65-second convex edge, 7-positioning plug, 71-plug disc, 711-bayonet, 72-plug tube, 721-narrowing part, 73-supporting convex point and 74-first convex edge.

[ Detailed description ] of the invention

Referring to fig. 1 to 10, the normally open valve of the utility model comprises a valve seat 1, an electromagnetic assembly 2, a diaphragm assembly 3, a return spring 4, a piston assembly 5, a guide cylinder 6 and a positioning plug 7, wherein the guide cylinder 6 is fixed on the valve seat 1 and is provided with an iron core 21 capable of supplying the electromagnetic assembly 2 and a movable channel 61 for sliding the piston assembly 5, the diaphragm assembly 3 is positioned between a back pressure cavity 11, a water inlet cavity 12 and a water outlet cavity 13 of the valve seat 1, the electromagnetic assembly 2 can utilize the iron core 21 to drive the piston assembly 5 to be close to the diaphragm assembly 3 and adjust the pressure of the back pressure cavity 11 to cut off a passage between the water inlet cavity 12 and the water outlet cavity 13 when being electrified, the return spring 4 has an elastic trend of pulling the piston assembly 5 to return to the original position in a natural state, and the guide cylinder 6 and the positioning plug 7 can be clamped by a clamping structure and enable the piston assembly 5 to be in the movable channel 61 during power failure.

The discharge port of the movable channel 61 is surrounded by a plurality of chucks 62, the positioning plug 7 comprises a plug disc 71, the plug disc 71 is fixed with the piston assembly 5, and the outer edge of the plug disc is surrounded by a plurality of bayonets 711 which can be respectively clamped with the chucks 62.

The side of the plug disc 71 facing the diaphragm assembly 3 is provided with a plurality of supporting protruding points 73 in a surrounding manner, and the plug disc 71 can still keep a water gap between the plug disc and the diaphragm assembly 3 when each supporting protruding point 73 respectively contacts the diaphragm assembly 3.

The side of the stopper disc 71 facing away from the diaphragm assembly 3 is provided with a stopper 72, which stopper 72 can be inserted into the movable channel 61.

The outer edge of the plug cylinder 72 is provided with a plurality of first ribs 74 in a surrounding manner, and the positioning plug 7 can be in interference connection with the guide cylinder 6 through each first rib 74.

The piston assembly 5 comprises a piston rod 51 and a piston cap 52, one end of the piston rod 51 is propped against the iron core 21, the other end of the piston rod is fixed with the piston cap 52 and forms a step part, a narrowing part 721 which can prop against the step part is arranged at the free end of the plug cylinder 72, and the return spring 4 is sleeved outside the piston rod 51, and the two ends of the return spring are respectively fixed with the piston rod 51 and the positioning plug 7.

When the guide cylinder 6 falls off, the distance d1 between the piston cap 52 and the diaphragm assembly 3 is more than 0.95mm, and the distance d4 between the iron core 21 and the lower sleeve of the electromagnetic assembly 2 is less than or equal to +/-1 mm; during power failure, the distance d2 between the iron core 21 and the lower sleeve of the electromagnetic assembly 2 is 1-2 mm, and the difference between the distance d3 between the piston cap 52 and the diaphragm assembly 3 and the distance d2 between the iron core 21 and the lower sleeve of the electromagnetic assembly 2 is less than or equal to 0.5mm.

The piston rod 51 has a concave portion 511 provided on a rod wall, and the piston cap 52 is wrapped around the piston rod 51 and has a convex portion 521 extending into the concave portion 511.

One end of the movable channel 61 is closed by a sealing plate, and the other end is provided with an annular convex edge 63 extending outwards, and each clamping head 62 is positioned above the annular convex edge 63.

The outer fringe of annular chimb 63 is equipped with the annular turn-ups 64 that turn over towards keeping away from shrouding one side, the outer wall department of annular turn-ups 64 encircles and is equipped with a plurality of second bead 65, guide cylinder 6 accessible each second bead 65 and be connected with disk seat 1 looks interference.

The working process of the utility model comprises the following steps:

Referring to fig. 7 and 8, when the normally open valve is in a normal state and the electromagnetic assembly 2 is not energized, the guide cylinder 6 and the positioning plug 7 are fixed by the clamping heads 62 and the clamping openings 711 which are clamped by the groups, and the piston assembly 5 is plugged into the movable channel 61 under the driving of the positioning plug 7. At this time, since the flow rate of water from the water inlet chamber 12 into the back pressure chamber 11 along the water inlet hole (above the diaphragm assembly 3, not shown) is smaller than the flow rate of water from the back pressure chamber 11 into the water outlet chamber 13 along the water outlet hole 311, the diaphragm assembly 3 gradually moves toward the back pressure chamber 11 under the action of pressure until the water inlet chamber 12 and the water outlet chamber 13 are communicated.

Referring to fig. 9 and 10, in the case that the electromagnetic assembly 2 is still not energized, even if the positioning plug 7 is inadvertently dropped, the water gap generated can be used to avoid the water outlet 311 from being blocked, so as to prevent the valve from being changed from the normally open valve to the normally closed valve, because the plurality of supporting protruding points 73 capable of supporting exist between the plug disc 71 and the diaphragm plate 31 of the diaphragm assembly 3.

The above embodiments are illustrative of the present utility model, and not limiting, and any simple modifications of the present utility model fall within the scope of the present utility model.

Claims

1. Normally open valve, including disk seat (1), electromagnetic assembly (2), diaphragm subassembly (3), return spring (4), piston subassembly (5), guide cylinder (6) and location stopper (7), guide cylinder (6) are fixed on disk seat (1) and are equipped with iron core (21) that can supply electromagnetic assembly (2) and piston subassembly (5) movable passageway (61) that slide, diaphragm subassembly (3) are located between back pressure chamber (11), water inlet chamber (12) and water outlet chamber (13) of disk seat (1), electromagnetic assembly (2) usable iron core (21) drive piston subassembly (5) are close to diaphragm subassembly (3) and adjust the pressure of back pressure chamber (11) in order to cut off the passageway between water inlet chamber (12) and water outlet chamber (13), return spring (4) have the elasticity trend that pulls piston subassembly (5) and resume normal position under natural state, its characterized in that: the guide cylinder (6) and the positioning plug (7) can be clamped by the clamping structure during power failure and enable the piston assembly (5) to be received in the movable channel (61).

2. The normally open valve of claim 1, wherein: the discharge port of the movable channel (61) is surrounded by a plurality of chucks (62), the positioning plug (7) comprises a plug disc (71), the plug disc (71) is fixed with the piston assembly (5), and a plurality of bayonets (711) which can be respectively clamped with the chucks (62) are surrounded by the outer edge of the plug disc.

3. The normally open valve of claim 2, wherein: the side of the plug disc (71) facing the diaphragm assembly (3) is circumferentially provided with a plurality of supporting protruding points (73), and when each supporting protruding point (73) is respectively contacted with the diaphragm assembly (3), a water gap can be reserved between the plug disc (71) and the diaphragm assembly (3).

4. The normally open valve of claim 3, wherein: a plug cylinder (72) is arranged on one side of the plug disc (71) facing away from the diaphragm assembly (3), and the plug cylinder (72) can be plugged into the movable channel (61).

5. The normally open valve of claim 4, wherein: the outer edge of the plug cylinder (72) is circumferentially provided with a plurality of first ribs (74), and the positioning plug (7) can be in interference connection with the guide cylinder (6) through each first rib (74).

6. The normally open valve of claim 4, wherein: the piston assembly (5) comprises a piston rod (51) and a piston cap (52), one end of the piston rod (51) is propped against the iron core (21), the other end of the piston rod is fixed with the piston cap (52) and forms a step part, a narrowing part (721) which can prop against the step part is arranged at the free end of the plug cylinder (72), and the return spring (4) is sleeved outside the piston rod (51) and two ends of the return spring are respectively fixed with the piston rod (51) and the positioning plug (7).

7. The normally open valve of claim 6, wherein: when the guide cylinder (6) falls off, the distance d1 between the piston cap (52) and the diaphragm assembly (3) is more than 0.95mm, and the distance d4 between the iron core (21) and the lower sleeve of the electromagnetic assembly (2) is less than or equal to +/-1 mm; during power failure, the distance d2 between the iron core (21) and the sleeve of the electromagnetic assembly (2) is 1-2 mm, and the difference between the distance d3 between the piston cap (52) and the diaphragm assembly (3) and the distance d2 between the iron core (21) and the sleeve of the electromagnetic assembly (2) is less than or equal to 0.5mm.

8. The normally open valve of claim 6, wherein: the piston rod (51) is provided with an inner concave part (511) at the rod wall, the piston cap (52) is coated outside the piston rod (51) and is provided with an inner convex part (521) extending into the inner concave part (511).

9. The normally open valve of claim 2, wherein: one end of the movable channel (61) is closed by a sealing plate, the other end of the movable channel is provided with an annular convex edge (63) extending outwards, and each clamping head (62) is positioned on the annular convex edge (63).

10. The normally open valve of claim 9, wherein: the outer fringe of annular chimb (63) is equipped with and turns over annular turn-ups (64) of rolling over towards keeping away from shrouding one side, the outer wall department of annular turn-ups (64) encircles and is equipped with a plurality of second bead (65), guide cylinder (6) accessible each second bead (65) and be connected with disk seat (1) looks interference.