Anti-freezing electromagnetic valve

Abstract

The utility model provides an anti-freezing electromagnetic valve. The anti-freezing electromagnetic valve comprises a flow path shell internally provided with a water passing flow path. The actuating pressure relief mechanism comprises a valve seat and an actuating membrane piece, wherein the circumferential wall of the valve seat is sealed with the annular wall of the valve opening, and water can pass through the valve seat; when the water inlet channel at the front end of the water flowing channel forms ice blocks, the ice blocks with the expanded volume jack the actuating membrane piece upwards until the closed ring is separated from the touch pressing ring, the pressure relief channel is opened and communicated with the water flowing channel, and at the moment, the pressure in the water flowing channel can be relieved into the atmosphere. According to the electromagnetic valve, the electromagnetic valve is designed to be in a middle water inlet and side water outlet flow path mode, when the water inlet water path at the front end of the actuator forms ice blocks, the ice blocks with the expanded volume jack the actuating membrane piece upwards till the closed ring is separated from the touch pressing ring, the pressure relief channel is opened and communicates with the water flow path, and the purpose of automatic pressure relief of the upstream of the electromagnetic valve is achieved; the problem of frost crack of the electromagnetic valve body is avoided, and the safety of the electromagnetic valve in the using process is improved.

Description

Technical Field

[0001] The utility model relates to an anti-freezing solenoid valve. Background Art

[0002] For the category of induction flush valves, including but not limited to urinal induction flush valves, toilet induction flush valves, faucet flush valves, etc., in extremely cold low-temperature environments, due to the sharp expansion of the volume of the water or water vapor remaining inside the valve body after freezing, an extremely large pressure beyond normal is formed, causing the valve body to be overwhelmed and cracked, and then resulting in water leakage.

[0003] At present, there are various ways to solve the cracking of the valve body. For example: (1) Strengthening the insulation measures: By using insulation materials such as rubber and plastic sponge, rock wool, etc. to tightly wrap the flush valve and related pipelines to implement heat preservation treatment, thereby effectively preventing the water inside the valve body from freezing; (2) Adding a tracing heating system: Wrapping the electric tracing band around the flush valve and pipeline, and maintaining an appropriate temperature by means of energizing and heating, thereby preventing the water inside the valve body from freezing; (3) Draining the stored water: When the temperature drops significantly, close the valve in time and completely drain the stored water remaining inside the valve body and pipeline to prevent freezing due to the expansion of the frozen water; (4) Setting up heating facilities indoors: It is necessary to ensure that the room where the flush valve is installed has sufficient heating conditions to keep the indoor temperature always above the freezing point.

[0004] However, in the actual implementation process of these solutions, a large amount of manpower and material resources are often consumed for careful maintenance. Not only are the operations cumbersome, but the economic benefits are not high, which is not conducive to the later maintenance of the valve body and causes great trouble and inconvenience to users. Summary of the Utility Model

[0005] The utility model provides an anti-freezing solenoid valve, which can effectively solve the above problems.

[0006] The utility model is realized as follows:

[0007] An anti-freezing solenoid valve includes a flow path housing with a water flow path inside, at least one actuator installed inside the flow path housing, and a diaphragm mounted on the end of the valve stem of the actuator; a valve port for controlling the on-off of the water flow path is provided on the flow path housing, and it is characterized in that:

[0008] An actuator pressure relief mechanism is provided at the valve port. The actuator pressure relief mechanism includes a valve seat with a circumferential wall sealed to the circumferential wall of the valve port and allowing water to pass through, and an actuator membrane member coaxially and slidably engaged inside the valve seat;

[0009] The actuating membrane member includes an elastic membrane seat. At the water-facing end of the elastic membrane seat, a closed ring is integrally formed, and at the water-backing end, a water-receiving seat with an annular water-receiving groove is integrally formed. The annular water-receiving groove and the top plate of the flow path housing enclose a pressurizing chamber for accommodating water flow. At the water-facing end of the valve seat, there is a touch pressure ring arranged opposite to the closed ring. When the closed ring and the touch pressure ring are separated, a pressure relief channel communicating with the water flow path is formed between them.

[0010] When the elastic membrane seat slides downward until the closed ring touches the touch pressure ring, the pressure relief channel is closed and the water flow path is blocked. At this time, the solenoid valve is in the closed valve state. When ice blocks form in the water inlet path at the front end of the water flow path, the expanding ice blocks push the elastic membrane seat upward until the closed ring and the touch pressure ring are separated. The pressure relief channel opens and is connected to the water flow path. At this time, the pressure in the water flow path can be relieved to the atmosphere.

[0011] As a further improvement, the actuating membrane member further includes a sliding ring slidably engaged in the valve seat and a water pipe coaxially fixed in the elastic membrane seat. The elastic membrane seat is coaxially fixed in the sliding ring. The water pipe has a pressurizing hole. One end of the pressurizing hole communicates with the annular water-receiving groove, and the other end communicates with the water inlet path of the water flow path.

[0012] As a further improvement, at the water-backing end of the water pipe, there is an installation groove, and a top pressure spring for providing a downward sliding trend to the elastic membrane seat is arranged in the installation groove. One end of the top pressure spring is fixedly connected to the bottom of the installation groove, and the other end is fixedly connected to the top plate.

[0013] As a further improvement, an extension ring is formed on the outside of the valve seat. An outlet channel is formed by the enclosure of the extension ring, the valve port wall surface, and the top plate. An outflow hole for communicating the outlet channel and the outlet water path is opened on the extension ring. A water storage cavity, at least one delivery hole, and at least one pressure relief hole corresponding to the actuator are opened on the top plate. One end of the delivery hole communicates with the pressurizing chamber, and the other end communicates with the pressurizing chamber. One end of the pressure relief hole communicates with the water storage cavity, and the other end communicates with the outlet channel. The diaphragm of the valve stem of the actuator is located at the pressure relief hole and is used to control the opening and closing of the pressure relief hole.

[0014] As a further improvement, a regulating valve core communicating with the water flow path is installed on the flow path housing, and the regulating valve core is used to control the on-off of the water inlet path at the front end of the water flow path.

[0015] As a further improvement, a vacuum break membrane is installed on the inner wall surface of the outlet water path of the flow path housing. The vacuum break membrane has a coaxially and integrally formed clamping portion and a gap portion. The clamping portion is press-fitted into an installation ring groove opened at the front end of the inner wall surface of the outlet water path, and there is a gap between the gap portion and the inner wall of the rear outlet water path.

[0016] The beneficial effects of the present utility model are:

[0017] In this application, the solenoid valve is designed with a flow path where water enters from the middle and exits from the side. When ice forms in the water inlet passage at the front end of the actuator, the expanding ice pushes the actuating membrane upward until the sealing ring separates from the pressure contact ring, opening the pressure relief passage and connecting it to the water flow path. At this time, the pressure in the water flow path can be relieved to the atmosphere, achieving the purpose of automatic pressure relief upstream of the solenoid valve, avoiding the problem of the solenoid valve body cracking due to freezing, and improving the safety of the solenoid valve during use. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is the present utility model Figure 1 schematic diagram of the overall structure at A-A in;

[0020] Figure 3 is a schematic diagram of the present utility model showing the positional relationship between the actuating membrane and the valve seat when the solenoid valve is in the closed valve state;

[0021] Figure 4 is a sectional view of the water flow path in the present utility model when the solenoid valve is in the open valve state;

[0022] Figure 5 is a schematic diagram of the present utility model showing the positional relationship between the actuating membrane and the valve seat when the solenoid valve is in the open valve state;

[0023] Figure 6 is a schematic diagram of the present utility model showing the assembly relationship between the actuating membrane and the valve seat

[0024] Figure 7 is a top plan view of the solenoid valve of the present utility model;

[0025] Figure 8 is the present utility model Figure 7 sectional schematic views at B-B and C-C in;

[0026] Figure 9 is the present utility model Figure 8 magnified schematic view at A in;

[0027] Figure 10 is the present utility model Figure 8 magnified schematic view at B in.

[0028] The reference signs in the drawings are as follows:

[0029] 10, flow path housing; 11, top plate; 111, water storage cavity; 112, delivery hole; 113, pressure relief hole; 101, valve port; 102, water inlet passage; 103, water outlet passage; 104, water outlet channel; 105, installation ring groove;

[0030] 20. Actuator; 21. Valve stem; 22. Diaphragm; 201. Electromagnetic actuator; 202. Manual actuator;

[0031] 30. Actuating pressure relief mechanism; 301. Pressure relief passage;

[0032] 31. Valve seat; 311. Touching pressure ring; 312. Extension ring; 3121. Outflow hole; 32. Actuating membrane member; 320. Boosting chamber; 321. Sliding ring; 322. Elastic membrane seat; 3221. Sealing ring; 3222. Water receiving seat; 323. Water pipe; 3230. Boosting hole; 3231. Installation groove; 324. Top pressure spring; 325. Filter screen;

[0033] 40. Regulating valve core; 41. Filter screen cover;

[0034] 50. Vacuum breaking membrane; 51. Clamping portion; 52. Gap portion;

[0035] 60. Outer shell. Detailed implementation mode

[0036] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] An anti-freezing solenoid valve, as Figures 1 to 6 shown, includes a flow path housing 10 with a water flow path inside, at least one actuator 20 installed in the flow path housing 10, and a diaphragm 22 mounted on the end of the valve stem 21 of the actuator 20; a valve port 101 for controlling the on-off of the water flow path is provided on the flow path housing 10. Taking the valve port 101 as the boundary, the front end of the water flow path is defined as the water inlet path 102, and the rear end is defined as the water outlet path 103; an actuating pressure relief mechanism 30 is arranged at the valve port 101. The actuating pressure relief mechanism 30 includes a valve seat 31 with a circumferential wall sealed with the circumferential wall of the valve port 101 and allowing water to pass through, and an actuating membrane member 32 coaxially and slidably engaged inside the valve seat 31; a sealing ring 3221 is provided at the water-facing end of the actuating membrane member 32, and a touching pressure ring 311 arranged opposite to the sealing ring 3221 is provided at the water-facing end of the valve seat 31. When the sealing ring 3221 and the touching pressure ring 311 are separated from each other, a pressure relief passage 301 communicating with the water flow path is formed therebetween; when the actuating membrane member 32 slides downward until the sealing ring 3221 touches the touching pressure ring 311, the pressure relief passage 301 is closed and the water flow path is cut off, and at this time the solenoid valve is in the valve-closed state.

[0038] When ice blocks are formed in the water inlet path 102 at the front end of the water flow path, the volume-expanded ice blocks push the actuating membrane member 32 upward until the sealing ring 3221 is separated from the touching pressure ring 311, and the pressure relief passage 301 is opened and connected to the water flow path. At this time, the pressure in the water flow path can be relieved to the atmosphere to avoid the situation that the solenoid valve is frozen and cracked due to overpressure in the valve body.

[0039] The structures of the components of the present utility model will be described separately below.

[0040] As Figure 3 , Figure 5 , Figures 9 to 10 shown, the top of the flow path housing 10 has a top plate 11 for locking the actuator 20. In this embodiment, the number of actuators 20 is taken as two for example, and one is an electromagnetic actuator 201 and the other is a manual actuator 202. In other embodiments, two electromagnetic actuators 201 or two manual actuators 202 can also be adopted. The actuating membrane member 32 includes a sliding ring 321 slidably engaged with the valve seat 31, an elastic membrane seat 322 coaxially fixed within the sliding ring 321, and a water pipe 323 coaxially fixed within the elastic membrane seat 322. A closing ring 3221 is integrally formed at the water-facing end of the elastic membrane seat 322, and a water-receiving seat 3222 is integrally formed at the water-back end of the elastic membrane seat 322. An upward-opening annular water-receiving groove is formed on the water-receiving seat 3222. A pressure-increasing hole 3230 is provided within the water pipe 323. One end of the pressure-increasing hole 3230 communicates with the annular water-receiving groove, and the other end communicates with the water inlet path 102 of the water flow path. A pressure-increasing chamber 320 for accommodating water flow is formed by enclosing the water-receiving groove and the top plate 11. An installation groove 3231 is provided at the water-back end of the water pipe 323, and a pressing spring 324 for providing a downward sliding tendency for the elastic membrane seat 322 is arranged within the installation groove 3231. One end of the pressing spring 324 is fixedly connected to the bottom of the installation groove 3231, and the other end is fixedly connected to the top plate 11.

[0041] It should be noted here that the elastic membrane seat 322, the closing ring 3221, and the water-receiving seat 3222 of the present application are all made of rubber material. At low temperatures, due to the thermal expansion and contraction effect, the elastic membrane seat 322 is more likely to deform under the pressure of the ice cubes with volume expansion, that is, the closing ring 3221 and the pressing ring 311 are more likely to separate, so that the water flow path communicates with the atmosphere and the pressure is relieved more quickly.

[0042] As Figures 2 to 5 shown, an extension ring 312 is formed on the outer side of the valve seat 31. An outlet channel 104 is formed by enclosing the extension ring 312, the wall surface of the valve port 101, and the top plate 11. An outflow hole 3121 for communicating the outlet channel 104 and the water outlet path 103 is provided on the extension ring 312. The top plate 11 is provided with a water storage chamber 111 corresponding to the actuator 20, at least one delivery hole 112, and at least one pressure relief hole 113. One end of the delivery hole 112 communicates with the pressure-increasing chamber 320, and the other end communicates with the pressure-increasing chamber 320. One end of the pressure relief hole 113 communicates with the water storage chamber 111, and the other end communicates with the outlet channel 104. The diaphragm 22 of the valve stem 21 of the actuator 20 is located at the pressure relief hole 113 and is used to control the opening and closing of the pressure relief hole 113.

[0043] As Figures 1 to 4As shown, the flow path housing 10 is equipped with a regulating valve core 40 connected to the water flow path water inlet 102, so that the front end water inlet 102 can be controlled to be on and off, which is not only convenient for subsequent maintenance, but also can be used to adjust the amount of water. A filter cover 41 is arranged around the regulating valve core 40, and the filter cover 41 has a plurality of water filtering holes for blocking impurities. A filter screen 325 with water filtering holes is also arranged at the water inlet end of the water pipe 323.

[0044] like Figure 2 and Figure 4 As shown, a vacuum breaking membrane 50 is installed on the inner wall surface of the water outlet waterway 103 of the flow path housing 10. The vacuum breaking membrane 50 has a coaxial and integrally formed clamping portion 51 and a gap portion 52. The clamping portion 51 is interference-engaged in the mounting annular groove 105 opened at the front end of the inner wall of the water outlet waterway 103, and there is a gap between the gap portion 52 and the inner wall of the rear end water outlet waterway 103; when the solenoid valve siphons, the gap between the gap portion 52 and the inner wall of the water outlet waterway 103 is connected to the atmosphere, thereby destroying the generated negative pressure, and then destroying the siphon phenomenon, so as to ensure the safe use of the solenoid valve.

[0045] Combination Figures 1 to 10 The implementation principle of the solenoid valve of this application is described in detail:

[0046] When the solenoid valve receives the valve opening signal, the electromagnetic actuator 201 is energized (the manual actuator 202 is turned on), and the valve stem 21 is moved upward by the electromagnetic force to overcome the spring force of the internal spring, so as to drive the diaphragm 22 at the end of the valve stem 21 at the pressure relief hole 113 to separate from the pressure relief hole 113, so that the water storage chamber 111 and the water outlet channel 104 are connected to each other (such as Figure 9 Left picture and Figure 10 As shown in the left figure, the water accumulated in the water storage chamber 111 and the pressure-boosting chamber 320 can be discharged from the water outlet channel 104 and the outflow hole 3121 in sequence through the pressure relief hole 113. When the water pressure in the water outlet channel 103 at the rear end of the water flow path is less than the water pressure in the water inlet channel 102 at the front end, the water flow in the water inlet channel 102 overcomes the spring force of the top pressure spring 324 to push the elastic membrane seat 322 to slide upward to the closed ring 3221 and separate from the contact pressure ring 311, so that the pressure relief channel 301 is connected with the water flow path, so that the water inlet channel 102 can transport water to the water outlet channel 103.

[0047] When the electromagnetic valve receives the valve closing signal, the electromagnetic actuator 201 is powered off, and the internal spring force presses down the valve stem 21, so that the diaphragm 22 at the end of the valve stem 21 is located in the pressure relief hole 113 to block the pressure relief hole 113, and the water flow of the water inlet waterway 102 enters the pressure boosting chamber 320 through the pressure boosting hole 3230. When the pressure boosting chamber 320 is filled with liquid, the water flow is delivered to the water storage chamber 111 through the delivery hole 112 (such as Figure 9 Right picture and Figure 10As shown in the right figure), in this way, the water pressure in the pressurizing chamber 320 and the spring force of the top pressure spring 324 act together to downwardly press the elastic membrane seat 322, so that the elastic membrane seat 322 slides downward until the closing ring 3221 contacts the pressing ring 311, thereby closing the pressure relief channel 301 and blocking the water flow path in the flow path housing 10.

[0048] The above embodiments are only for illustrating the present invention and are not intended to limit the present invention. Those of ordinary skill in the art can also make various transformations or changes without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and are defined by the respective claims.

Claims

1. An antifreeze solenoid valve, comprising a flow path housing (10) having a water flow path therein, at least one actuator (20) installed in the flow path housing (10), and a diaphragm (22) attached to the end of a valve stem (21) of the actuator (20); a valve port (101) for controlling the on-off of the water flow path is provided on the flow path housing (10), characterized in that: An actuated pressure relief mechanism (30) is provided at the valve port (101), the actuated pressure relief mechanism (30) comprising a valve seat (31) having a peripheral wall sealed with a peripheral wall of the valve port (101) and capable of passing water, and an actuated membrane (32) coaxially and slidably engaged with the interior of the valve seat (31); The actuating membrane (32) comprises an elastic membrane seat (322), the water-facing end of the elastic membrane seat (322) is integrally formed with a closed ring (3221), and the water-receiving end is integrally formed with a water-receiving seat (3222) having an annular water-receiving groove, the annular water-receiving groove and the top plate (11) at the top of the flow path housing (10) enclose a pressure-increasing chamber (320) for accommodating the water supply flow, the water-facing end of the valve seat (31) is provided with a contact pressure ring (311) arranged in correspondence with the closed ring (3221), and when the closed ring (3221) and the contact pressure ring (311) are separated, a pressure relief channel (301) connected to the water flow path is formed between the two; When the elastic membrane seat (322) slides downward until the closed ring (3221) contacts the pressure ring (311), the pressure relief channel (301) is closed and the water flow path is blocked, and the solenoid valve is in a closed state. When ice cubes are formed in the water inlet channel (102) at the front end of the water flow path, the ice cubes expand in volume and push the elastic membrane seat (322) upward until the closed ring (3221) is separated from the pressure ring (311), and the pressure relief channel (301) is opened and connected to the water flow path. At this time, the pressure in the water flow path can be released into the atmosphere.

2. An antifreeze solenoid valve as claimed in claim 1, characterized in that: The actuating membrane (32) further comprises a sliding buckle that is fitted into a sliding ring (321) in the valve seat (31) and a water passage (323) that is coaxially fixed in the elastic membrane seat (322); the elastic membrane seat (322) is coaxially fixed in the sliding ring (321); a pressure-increasing hole (3230) is provided in the water passage (323); one end of the pressure-increasing hole (3230) is in communication with an annular water receiving groove, and the other end is in communication with a water inlet channel (102) of the water flow path.

3. The antifreeze solenoid valve according to claim 1, characterized in that: A mounting groove (3231) is provided at the back-water end of the water passing pipe (323), and a pressure spring (324) is arranged in the mounting groove (3231) to provide the elastic membrane seat (322) with a downward sliding tendency. One end of the pressure spring (324) is fixedly connected to the bottom of the mounting groove (3231), and the other end is fixedly connected to the top plate (11).

4. An antifreeze solenoid valve as claimed in claim 2, characterized in that: An extension ring (312) is formed on the outside of the valve seat (31), and a water outlet channel (104) is formed by the extension ring (312), the wall surface of the valve port (101) and the top plate (11). An outflow hole (3121) for connecting the water outlet channel (104) and the water outlet waterway (103) is provided on the extension ring (312); a water storage chamber (111) corresponding to the actuator (20), at least one delivery hole (112) and at least one pressure relief hole (113) are provided on the top plate (11); one end of the delivery hole (112) is connected to the pressure boosting chamber (320), and the other end is connected to the pressure boosting chamber (320); one end of the pressure relief hole (113) is connected to the water storage chamber (111), and the other end is connected to the water outlet channel (104); a diaphragm (22) of the valve stem (21) of the actuator (20) is located at the pressure relief hole (113) and is used to control the opening and closing of the pressure relief hole (113).

5. The antifreeze solenoid valve according to claim 1, characterized in that: The flow path housing (10) is equipped with a regulating valve core (40) connected to the water flow path, and the regulating valve core (40) is used to control the on / off of the water inlet water path (102) at the front end of the water flow path.

6. The antifreeze solenoid valve according to claim 1, characterized in that: A vacuum breaking membrane (50) is installed on the inner wall surface of the water outlet waterway (103) of the flow path housing (10). The vacuum breaking membrane (50) comprises a coaxial and integrally formed clamping portion (51) and a gap portion (52). The clamping portion (51) is interference-engaged in a mounting annular groove (105) provided at the front end of the inner wall of the water outlet waterway (103). A gap exists between the gap portion (52) and the inner wall of the rear end of the water outlet waterway (103).

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