Antifreeze solenoid valve and flushing device

Abstract

The present invention provides an antifreeze solenoid valve and flushing device, including a flow path housing with a water flow path inside. The actuating pressure relief mechanism includes a valve seat that can pass water and is sealed with a circumferential wall and a valve port ring wall, and an actuating membrane that is coaxial and slides into the valve seat; when ice cubes are formed in the water inlet waterway at the front end of the water flow path, the ice cubes that expand in volume push the actuating membrane upward until the closed ring is separated from the contact pressure ring, and the pressure relief channel opens and is connected to the water flow path, and the pressure in the water flow path can be relieved to the atmosphere. The present application designs the solenoid valve as a flow path mode with water inlet in the middle and water outlet on the side. When ice cubes are formed in the water inlet waterway at the front end of the actuator, the ice cubes that expand in volume push the actuating membrane upward until the closed ring is separated from the contact pressure ring, and the pressure relief channel opens and is connected to the water flow path, thereby achieving the purpose of automatic pressure relief upstream of the solenoid valve, avoiding the problem of freezing and cracking of the solenoid valve body, and improving the safety of the solenoid valve during use.

Description

Technical Field

[0001] The invention relates to the field of solenoid valves, and in particular to an antifreeze solenoid valve. Background Art

[0002] The category of induction flush valves includes but is not limited to urinal induction flush valves, defecation induction flush valves, faucet flush valves, etc. However, in a severely cold environment, the water or water vapor retained inside the valve body expands rapidly after freezing, thereby forming an extraordinary huge pressure, causing the valve body to be unable to bear the load and freeze and crack, thereby causing water leakage.

[0003] At present, there are various ways to solve the problem of valve body freezing and cracking, such as: (1) Strengthening insulation measures: By using insulation materials such as rubber-plastic sponge and rock wool to tightly wrap the flushing valve and related pipes, insulation treatment is implemented to effectively prevent the water inside the valve body from freezing; (2) Adding a heating system: Wrap the electric heating tape around the flushing valve and pipes, and maintain a suitable temperature by heating them with electricity to prevent the water inside the valve body from freezing; (3) Emptying the stored water: When the temperature drops significantly, close the valve in time and completely drain the stored water in the valve body and pipes to prevent freezing and cracking due to the expansion of water freezing; (4) Installing heating facilities indoors: Make sure that the room where the flushing valve is installed has sufficient heating conditions to keep the indoor temperature above freezing point at all times.

[0004] However, in the actual implementation process, these solutions often consume a lot of manpower and material resources for careful maintenance, which is not only cumbersome to operate but also has low economic benefits, is not conducive to the later maintenance of the valve body, and causes great trouble and inconvenience to users. Summary of the invention

[0005] The present invention provides an antifreeze solenoid valve, which can effectively solve the above problems.

[0006] The present invention is achieved in that:

[0007] An antifreeze solenoid valve comprises a flow path housing with a water flow path inside, at least one actuator installed in the flow path housing and a diaphragm mounted on the end of a valve stem of the actuator; a valve port for controlling the on and off of the water flow path is provided on the flow path housing, an actuating pressure relief mechanism is provided at the valve port, the actuating pressure relief mechanism comprises a valve seat with a peripheral wall sealed with a valve port annular wall and capable of passing water, and an actuating diaphragm coaxially and slidingly fitted inside the valve seat;

[0008] The water-facing end of the actuating membrane has a closed ring, and the water-facing end of the valve seat has a contact pressure ring arranged in opposition to the closed ring. When the closed ring and the contact pressure ring are separated, a pressure relief channel connected to the water flow path is formed between the two.

[0009] When the actuating membrane slides downward until the closed ring and the contact ring are pressed, the pressure relief channel is closed and the water flow path is blocked. At this time, the solenoid valve is in a closed state. When ice cubes form in the water inlet channel at the front end of the water flow path, the ice cubes with expanded volume push the actuating membrane upward until the closed ring and the contact ring are separated, and the pressure relief channel is opened and connected to the water flow path. At this time, the pressure in the water flow path can be released to the atmosphere.

[0010] The top of the flow path housing is provided with a top plate for the actuator to lock, the actuating membrane comprises a sliding ring that slides in the valve seat, an elastic membrane seat coaxially fixed in the sliding ring, and a water pipe coaxially fixed in the elastic membrane seat, the closing ring is integrally formed at the water-facing end of the elastic membrane seat, the back-water end of the elastic membrane seat is integrally formed with a water receiving seat, the water receiving seat is provided with an annular water receiving groove opening upward, the elastic membrane seat, the closing ring and the water receiving seat are all made of rubber; the water pipe is provided with a pressurizing hole, one end of the pressurizing hole is communicated with the annular water receiving groove, and the other end is communicated with the water inlet of the water flow path; the annular water receiving groove and the top plate enclose a pressurizing chamber for accommodating the water flow;

[0011] An extension ring is formed on the outside of the valve seat, and the extension ring, the valve port wall and the top plate form a water outlet channel. The extension ring is provided with an outflow hole for connecting the water outlet channel and the water outlet waterway; the top plate is provided with a water storage chamber, at least one delivery hole and at least one pressure relief hole corresponding to the actuator, one end of the delivery hole is connected to the pressurizing chamber, and the other end is connected to the water storage chamber; one end of the pressure relief hole is connected to the water storage chamber, and the other end is connected to the water outlet channel. The diaphragm of the actuator valve stem is located at the pressure relief hole and is used to control the opening and closing of the pressure relief hole.

[0012] As a further improvement, a mounting groove is provided at the back water end of the water pipe, in which a pressure spring is arranged to provide the elastic membrane seat with a downward sliding tendency, one end of the pressure spring is fixedly connected to the bottom of the mounting groove, and the other end is fixedly connected to the top plate.

[0013] As a further improvement, the flow path housing is equipped with a regulating valve core connected to the water flow path, and the regulating valve core is used to control the on-off of the water inlet water path at the front end of the water flow path.

[0014] As a further improvement, a vacuum breaking membrane is installed on the inner wall surface of the water outlet waterway of the flow path shell. The vacuum breaking membrane has a coaxial and integrally formed clamping portion and a gap portion. The clamping portion is interference fit in the mounting ring groove opened at the front end of the inner wall of the water outlet waterway, and there is a gap between the gap portion and the inner wall of the water outlet waterway at the rear end.

[0015] The invention also relates to a flushing device, comprising a shell, in which an antifreeze electromagnetic valve is installed.

[0016] The beneficial effects of the present invention are:

[0017] The present application designs the solenoid valve with a flow path of water inlet in the middle and water outlet on the side. When ice is formed in the water inlet water path at the front end of the actuator, the expanded ice pushes the actuating membrane upward until the closed ring is separated from the contact pressure ring, and the pressure relief channel is opened and connected to the water flow path. At this time, the pressure in the water flow path can be relieved into the atmosphere, thereby achieving the purpose of automatic pressure relief upstream of the solenoid valve, avoiding the problem of freezing and cracking of the solenoid valve body, and improving the safety of the solenoid valve during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 The present invention Figure 1 Schematic diagram of the overall structure at AA in the middle;

[0020] Figure 3 It is a structural schematic diagram of the present invention reflecting the position relationship between the actuating diaphragm and the valve seat when the solenoid valve is in a closed state;

[0021] Figure 4 This is a cross-sectional view of the water path in the water flow path when the solenoid valve of the present invention is in the open valve state;

[0022] Figure 5 It is a structural schematic diagram of the present invention reflecting the position relationship between the actuating diaphragm and the valve seat when the solenoid valve is in the valve opening state;

[0023] Figure 6 It is a structural schematic diagram of the present invention reflecting 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 invention;

[0025] Figure 8 The present invention Figure 7 A schematic cross-sectional view of the middle BB;

[0026] Fig. 9 The present invention Figure 7 Schematic cross-sectional view at CC in the middle;

[0027] Fig.10 The present invention Figure 8 The enlarged schematic diagram of point D in the middle;

[0028] Fig.11 The present invention Figure 8 Enlarged schematic diagram of point E in the middle.

[0029] The accompanying drawings are marked as follows:

[0030] 10. Flow path housing; 11. Top plate; 111. Water storage chamber; 112. Delivery hole; 113. Pressure relief hole; 101. Valve port; 102. Water inlet waterway; 103. Water outlet waterway; 104. Water outlet channel; 105. Mounting ring groove;

[0031] 20. actuator; 21. valve stem; 22. diaphragm; 201. electromagnetic actuator; 202. manual actuator;

[0032] 30. Actuating pressure relief mechanism; 301. Pressure relief channel;

[0033] 31. Valve seat; 311. Contact ring; 312. Extension ring; 3121. Outflow hole; 32. Actuating membrane; 320. Pressurization chamber; 321. Sliding ring; 322. Elastic membrane seat; 3221. Closing ring; 3222. Water receiving seat; 323. Water pipe; 3230. Pressurization hole; 3231. Mounting groove; 324. Top pressure spring; 325. Filter;

[0034] 40. Regulating valve core; 41. Filter cover;

[0035] 50. vacuum breaking film; 51. clamping part; 52. gap part;

[0036] 60. Shell. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0038] An antifreeze solenoid valve, such as Figure 1 to Figure 6 As shown, it comprises 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 attached to the end of a valve stem 21 of the actuator 20; a valve port 101 for controlling the on and off of the water flow path is provided on the flow path housing 10, and the front end of the water flow path is defined as a water inlet water path 102 and the rear end is defined as a water outlet water path 103 with the valve port 101 as the boundary; an actuating pressure relief mechanism 30 is provided at the valve port 101, and the actuating pressure relief mechanism 30 comprises a peripheral wall sealed with the annular wall of the valve port 101 and capable of passing water A valve seat 31 and an actuating diaphragm 32 which is coaxial and slides into the interior of the valve seat 31; the actuating diaphragm 32 has a closing ring 3221 at the water-facing end, and the valve seat 31 has a contact pressure ring 311 which is arranged opposite to the closing ring 3221 at the water-facing end. When the closing ring 3221 and the contact pressure ring 311 are separated, a pressure relief channel 301 which is connected to the water flow path is formed therebetween; when the actuating diaphragm 32 slides downward until the closing ring 3221 contacts the contact pressure ring 311, the pressure relief channel 301 is closed and the water flow path is blocked. At this time, the solenoid valve is in a closed valve state.

[0039] When ice is formed in the water inlet channel 102 at the front end of the water flow path, the expanded ice pushes up the actuating membrane 32 until the closing ring 3221 is separated from the contact 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 relieved into the atmosphere to prevent the solenoid valve from freezing and cracking due to pressure overload in the valve body.

[0040] The structures of the various components of the present invention are described below.

[0041] like Figure 3 , Figure 5 , Figures 9 to 11 As shown, the top of the flow path housing 10 has a top plate 11 for locking the actuator 20. The number of actuators 20 used in this embodiment is two, 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 may be used. The actuating membrane 32 includes a sliding ring 321 that slides into the valve seat 31, an elastic membrane seat 322 that is coaxially fixed in the sliding ring 321, and a water pipe 323 that is coaxially fixed in the elastic membrane seat 322. The closing ring 3221 is integrally formed at the water-facing end of the elastic membrane seat 322, and the water-receiving seat 3222 is integrally formed at the water-receiving end of the elastic membrane seat 322. The water-receiving seat 3222 is provided with an annular water-receiving groove that opens upward, and the water-receiving pipe 323 has a pressurizing hole 323. 0, one end of the boost hole 3230 is communicated with the annular water receiving groove, and the other end is communicated with the water inlet waterway 102 of the water flow path; the annular water receiving groove and the top plate 11 are enclosed to form a boost chamber 320 for accommodating the water flow, and a mounting groove 3231 is provided at the back water end of the water pipe 323, and a top 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 top 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.

[0042] It should be noted here that the elastic membrane seat 322, the closed ring 3221 and the water receiving seat 3222 of the present application are all made of rubber. At low temperatures, due to the thermal expansion and contraction effects, the elastic membrane seat 322 is more likely to be deformed by the pressure of the expanded ice cubes, that is, the closed ring 3221 and the contact pressure ring 311 are more likely to separate, so that the water flow path is connected to the atmosphere and the pressure is released more quickly.

[0043] like Figure 2 to Figure 5As shown, an extension ring 312 is formed on the outer side of the valve seat 31, and the extension ring 312, the wall surface of the valve port 101 and the top plate 11 enclose a water outlet channel 104, and an outflow hole 3121 for connecting the water outlet channel 104 and the water outlet waterway 103 is opened on the extension ring 312; a water storage chamber 111, at least one delivery hole 112 and at least one pressure relief hole 113 corresponding to the actuator 20 are opened on the top plate 11, one end of the delivery hole 112 is connected to the pressurization chamber 320, and the other end is connected to the water storage chamber 111; 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, and 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.

[0044] like Figure 1 to Figure 4 As 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.

[0045] 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.

[0046] Combination Figures 1 to 11 The implementation principle of the solenoid valve of this application is described in detail:

[0047] 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 Fig. 9 Left picture and Fig.10As 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.

[0048] 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 Fig.10 Right picture and Fig.11 As shown in the right figure, the water pressure in the boost chamber 320 and the water storage chamber 111 and the spring force of the top pressure spring 324 work together to press the elastic membrane seat 322 downward, so as to actuate the elastic membrane seat 322 to slide downward until the closing ring 3221 contacts the contact ring 311, thereby closing the pressure relief channel 301 and blocking the water flow path in the flow path housing 10.

[0049] The above embodiments are only used to illustrate the present invention, not to limit the present invention. A person skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and be defined by the 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 water-facing end of the actuating membrane (32) has a closed ring (3221), and the water-facing end of the valve seat (31) has a contact pressure ring (311) arranged in correspondence with the closed ring (3221). When the closed ring (3221) and the contact pressure ring (311) are separated, a pressure relief channel (301) communicating with the water flow path is formed between the two. When the actuating membrane (32) 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 form in the water inlet channel (102) at the front end of the water flow path, the ice cubes expand and push the actuating membrane (32) 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, and the pressure in the water flow path can be released into the atmosphere; The top of the flow path housing (10) has a top plate (11) for locking the actuator (20). The actuating membrane (32) comprises a sliding ring (321) that is fitted into the valve seat (31), an elastic membrane seat (322) that is coaxially fixed in the sliding ring (321), and a water passage (323) that is coaxially fixed in the elastic membrane seat (322). The sealing ring (3221) is integrally formed at the water-facing end of the elastic membrane seat (322), and the water-receiving end of the elastic membrane seat (322) is integrally formed with a bearing. A water seat (3222), wherein the water seat (3222) is provided with an annular water receiving groove opening upward, and the elastic membrane seat (322), the closed ring (3221) and the water receiving seat (3222) are all made of rubber; a pressure-increasing hole (3230) is provided in the water pipe (323), and one end of the pressure-increasing hole (3230) is communicated with the annular water receiving groove, and the other end is communicated with the water inlet channel (102) of the water flow channel; the annular water receiving groove and the top plate (11) enclose a pressure-increasing chamber (320) for accommodating the water flow; 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-increasing chamber (320) and the other end is connected to the water storage chamber (111); 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).

2. An antifreeze solenoid valve as claimed in 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).

3. 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.

4. 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).

5. A flushing device, characterized in that: The invention comprises a housing (60), wherein the antifreeze solenoid valve according to any one of claims 1 to 4 is installed in the housing (60).

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