Actuating pressure relief mechanism for anti-freezing electromagnetic valve

Abstract

The utility model provides an actuating pressure relief mechanism for an anti-freezing electromagnetic valve. The actuating pressure relief mechanism is installed in a valve port of a flow path shell. The circumferential wall of the valve seat is sealed with the annular wall of a valve opening, water can pass through the valve seat, and the actuating membrane piece is coaxially arranged in the valve seat in a sliding buckle fit mode. 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. The actuating pressure relief mechanism is mounted on the valve port of the electromagnetic valve, so that the electromagnetic valve is changed into a middle water inlet and side water outlet flow path mode, when an ice block is formed in a water inlet path at the front end, the ice block with the expanded volume jacks the actuating membrane piece upwards until the closed ring is separated from the contact pressure ring, and the pressure relief channel is opened and communicates with the water flow path; the purpose of upstream automatic pressure relief 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 actuating pressure relief mechanism for 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 rapid expansion of the volume of the water or water vapor remaining inside the valve body after freezing, an extremely large pressure is formed, causing the valve body to be overwhelmed and cracked, and then resulting in water leakage.

[0003] After the electromagnetic actuator is installed on the solenoid valve, the water circuit can be clearly divided into two parts: the upstream of the electromagnetic actuator and the downstream of the electromagnetic actuator. Under normal circumstances, the pressure upstream of the electromagnetic actuator is relatively high and is in a pressurized state for a long time (because the upstream is the water inlet circuit filled with water and the water pressure is high), while the pressure downstream is low (the outlet water circuit is a mixed environment of water and air). The water will flow out through the outlet water circuit for pressure relief and drainage. However, under low-temperature conditions, the internal water freezes and expands, forming a huge pressure, which will cause the valve body to rupture due to being unable to withstand such a huge pressure.

[0004] Currently, in the structural design of most solenoid valve bodies on the market, the main method is side water inlet and middle water outlet. In this structure, once the upstream water inlet circuit freezes, the water sealing diaphragm will be pressed more firmly and sealed by the water pressure, and effective pressure relief cannot be carried out. Summary of the Utility Model

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

[0006] The utility model is realized as follows:

[0007] An actuating pressure relief mechanism for an anti-freezing solenoid valve, the actuating pressure relief mechanism is installed in the valve port of the flow path housing; it includes a valve seat with a circumferential wall sealed with the valve port ring wall and allowing water to pass through, and an actuating membrane piece coaxially and slidably engaged inside the valve seat;

[0008] The water-facing end of the actuating membrane piece has a closed ring, and the water-facing end of the valve seat has 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;

[0009] When the actuating membrane slides downward until the closing ring touches the pressing 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 forms in the water inlet path at the front end of the water flow path, the expanding ice pushes the actuating membrane upward until the closing ring separates from the pressing ring. 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.

[0010] As a further improvement, the top of the flow path housing has a top plate. The actuating membrane includes a sliding ring that is slidably engaged in the valve seat, an elastic membrane seat coaxially fixed inside the sliding ring, and a water pipe coaxially disposed inside the elastic membrane seat. The closing ring is integrally formed at the water-facing end of the elastic membrane seat. A water receiving seat is integrally formed at the water-back end of the elastic membrane seat. An upward-opening annular water receiving groove is formed on the water receiving seat. A pressure increasing hole is provided inside the water pipe. One end of the pressure increasing hole communicates with the annular water receiving groove, and the other end communicates with the water inlet path of the water flow path. The annular water receiving groove and the top plate enclose a pressure increasing chamber for accommodating water flow.

[0011] As a further improvement, at least one actuator is locked on the top plate. The end of the valve stem of the actuator has a diaphragm. An extension ring is formed outside the valve seat. The extension ring, the valve port wall surface, and the top plate enclose an outlet channel. An outflow hole for communicating the outlet channel and the outlet water path is formed on the extension ring. A water storage chamber, at least one delivery hole, and at least one pressure relief hole corresponding to the actuator are formed on the top plate. One end of the delivery hole communicates with the pressure increasing chamber, and the other end communicates with the pressure increasing chamber. One end of the pressure relief hole communicates with the water storage chamber, and the other end communicates with the outlet channel. The diaphragm 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, an installation groove is provided at the water-back end of the water pipe. A top pressure spring for providing a downward sliding tendency for the elastic membrane seat is disposed 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, the number of actuators on the top plate is two, one of which is an electromagnetic actuator and the other is a manual actuator.

[0014] The beneficial effects of the present utility model are:

[0015] In this application, by installing an actuating pressure relief mechanism on the valve port of the solenoid valve, the solenoid valve is changed to a flow path mode of intermediate water inlet and side water outlet. When ice forms in the water inlet path at the front end, the expanding ice pushes the actuating membrane upward until the closing ring separates from the pressing ring. 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, achieving the purpose of automatic upstream pressure relief, avoiding the problem of freezing and cracking of the solenoid valve body, and improving the safety of the solenoid valve during use. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is the present utility model Figure 1 schematic diagram of the overall structure at A-A in;

[0018] Figure 3 is a schematic diagram showing the positional relationship between the actuating membrane and the valve seat when the solenoid valve of the present utility model is in the valve-closed state;

[0019] Figure 4 is a sectional view of the water flow path in the present utility model when the solenoid valve is in the valve-open state;

[0020] Figure 5 is a schematic diagram showing the positional relationship between the actuating membrane and the valve seat when the solenoid valve of the present utility model is in the valve-open state;

[0021] Figure 6 is a schematic diagram showing the assembly relationship between the actuating membrane and the valve seat of the present utility model

[0022] Figure 7 is a top plan view of the solenoid valve of the present utility model;

[0023] Figure 8 is the present utility model Figure 7 sectional schematic views at B-B and C-C in;

[0024] Figure 9 is the present utility model Figure 8 magnified schematic view at A in;

[0025] Figure 10 is the present utility model Figure 8 magnified schematic view at B in.

[0026] The reference signs in the figure are as follows:

[0027] 10, flow path housing; 11, top plate; 111, water storage chamber; 112, delivery hole; 113, pressure relief hole; 101, valve port; 102, inlet water path; 103, outlet water path; 104, outlet channel; 105, mounting ring groove;

[0028] 20, actuator; 21, valve stem; 22, diaphragm; 201, electromagnetic actuator; 202, manual actuator;

[0029] 30, actuating pressure relief mechanism; 301, pressure relief channel;

[0030] 31. Valve seat; 311. Touching pressure ring; 312. Extension ring; 3121. Outflow hole; 32. Actuating membrane; 320. Pressurizing chamber; 321. Sliding ring; 322. Elastic membrane seat; 3221. Sealing ring; 3222. Water receiving seat; 323. Water pipe; 3230. Pressurizing hole; 3231. Installation groove; 324. Top pressure spring; 325. Filter screen;

[0031] 40. Regulating valve core; 41. Filter screen cover;

[0032] 50. Vacuum breaking membrane; 51. Clamping part; 52. Gap part;

[0033] 60. Outer shell. Detailed implementation mode

[0034] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] An actuating and pressure-relieving mechanism for 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 at the end of the valve stem 21 of the brake; 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 and pressure-relieving mechanism 30 is arranged at the valve port 101. The actuating and pressure-relieving mechanism 30 includes a water-permeable valve seat 31 with its peripheral wall sealed to the peripheral wall of the valve port 101, and an actuating membrane 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 32, and a touching pressure ring 311 is provided at the water-facing end of the valve seat 31 and is arranged opposite to the sealing ring 3221. When the sealing ring 3221 and the touching pressure ring 311 are separated, a pressure-relieving channel 301 communicating with the water flow path is formed therebetween; when the actuating membrane 32 slides downward until the sealing ring 3221 touches the touching pressure ring 311, the pressure-relieving channel 301 is closed and the water flow path is cut off, and at this time the solenoid valve is in the valve-closed state.

[0036] 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 32 upward until the sealing ring 3221 is separated from the touching pressure ring 311, and the pressure-relieving channel 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 prevent the solenoid valve from cracking due to overpressure in the valve body.

[0037] The structures of the various components of the present utility model will be described separately below.

[0038] As Figure 3 、 Figure 5 、 Figures 9 to 10As shown in the figure, the top of the flow path housing 10 has a top plate 11 for the actuator 20 to lock. In this embodiment, the number of actuators 20 is taken as two for example, 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 32 includes a sliding ring 321 that is slidably engaged in the valve seat 31, an elastic membrane seat 322 coaxially fixed in the sliding ring 321, and a water pipe 323 coaxially fixed in the elastic membrane. A closing ring 3221 is integrally formed at the water-facing end of the elastic membrane seat 322. A water-receiving seat 3222 is integrally formed at the back water 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 in 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 the water flow is formed by enclosing the water-receiving groove and the top plate 11. An installation groove 3231 is provided at the back water end of the water pipe 323. A pressing spring 324 that provides a downward sliding tendency for the elastic membrane seat 322 is arranged in 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.

[0039] It should be noted here that the elastic membrane seat 322, the closing ring 3221 and the water-receiving seat 3222 of this 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 contact pressing ring 311 are more likely to separate, so that the water flow path communicates with the atmosphere and the pressure is released more quickly.

[0040] As Figures 2 to 5 As shown in the figure, an extension ring 312 is formed on the outside 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 outlet water path 103 is provided 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 provided on the top plate 11. 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.

[0041] As Figures 1 to 4As shown, a regulating valve core 40 communicating with the water inlet waterway 102 of the through-flow water path is installed on the flow path housing 10. In this way, the on-off of the front-end water inlet waterway 102 can be controlled, which can not only facilitate subsequent maintenance but also be used to regulate the water volume. A filter screen cover 41 is arranged on the peripheral side of the regulating valve core 40, and the filter screen cover 41 has a number 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.

[0042] As Figure 2 and Figure 4 As shown, a vacuum break membrane 50 is installed on the inner wall surface of the water outlet waterway 103 of the flow path housing 10. The vacuum break membrane 50 has a clamping portion 51 and a gap portion 52 that are coaxially and integrally formed. The clamping portion 51 is press-fitted into an installation ring groove 105 opened at the front end of the inner wall surface 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 siphon occurs in the solenoid valve, the gap between the gap portion 52 and the inner wall of the water outlet waterway 103 is communicated with the atmosphere, thereby destroying the generated negative pressure and then destroying the siphon phenomenon to ensure the safe use of the solenoid valve.

[0043] Combined with Figures 1 to 10 The implementation principle of the solenoid valve of this application is described in detail as follows:

[0044] When the solenoid valve receives an open valve signal, the electromagnetic actuator 201 is powered on (the switch of the manual actuator 202 is turned on), and the valve stem 21 moves upward under the action of 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 located at the pressure relief hole 113 to separate from the pressure relief hole 113, causing the water storage cavity 111 to communicate with the water outlet channel 104 (as Figure 9 shown in the left figure and Figure 10 shown in the left figure), so that the water accumulated in the water storage cavity 111 and the pressurizing cavity 320 can pass through the pressure relief hole 113 and flow out from the water outlet channel 104 and the outlet hole 3121 in sequence. When the water pressure at the rear-end water outlet waterway 103 of the through-flow water path is less than the water pressure at the front-end water inlet waterway 102, the water flow in the water inlet waterway 102 overcomes the spring force of the top pressure spring 324, so as to push the elastic membrane seat 322 to slide upward until the sealing ring 3221 separates from the contact pressure ring 311, so that the pressure relief channel 301 communicates with the through-flow water path, so that the water inlet waterway 102 can convey water flow to the water outlet waterway 103.

[0045] When the solenoid valve receives a close valve 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 located in the pressure relief hole 113 blocks the pressure relief hole 113. The water flow in the water inlet waterway 102 enters the pressurizing cavity 320 through the pressurizing hole 3230. When the pressurizing cavity 320 is filled with liquid, the water flow is conveyed to the water storage cavity 111 through the conveying hole 112 (as Figure 9 shown in the right figure and Figure 10As shown in the right figure), in this way, the water pressure in the pressure increasing chamber 320 and the water storage chamber 111 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 to make the closing ring 3221 contact with the contact pressure ring 311, so as to close the pressure relief channel 301 and block the water flow path in the flow path housing 10.

[0046] The above embodiments are only for illustrating the present invention and not for limiting 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 each claim.

Claims

1. An actuating pressure relief mechanism for an antifreeze solenoid valve, characterized in that: The actuating pressure relief mechanism (30) is installed in the valve port (101) of the flow path housing (10); it comprises a valve seat (31) whose peripheral wall is sealed with the annular wall of the valve port (101) and can pass water, and an actuating membrane (32) which is coaxial and slideably fitted inside 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 in volume 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. At this time, the pressure in the water flow path can be released into the atmosphere.

2. The actuating pressure relief mechanism for an antifreeze solenoid valve according to claim 1, characterized in that: The flow path housing (10) has a top plate (11) at the top, 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 passing 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); the elastic membrane seat (322) has a water receiving seat (3222) that is integrally formed at the water-receiving end; the water receiving seat (3222) is provided with an annular water receiving groove that opens upward; the water passing pipe (323) has a pressurizing hole (3230); one end of the pressurizing hole (3230) is in communication with the annular water receiving groove, and the other end is in communication with the water inlet channel (102) of the water flow path; the annular water receiving groove and the top plate (11) enclose a pressurizing chamber (320) for accommodating the water supply flow.

3. The actuating pressure relief mechanism for an antifreeze solenoid valve according to claim 2, characterized in that: At least one actuator (20) is locked onto the top plate (11), and the end of the valve stem (21) of the actuator (20) has a diaphragm (22); an extension ring (312) is formed on the outside of the valve seat (31), and the extension ring (312), the wall surface of the valve port (101) and the top plate (11) form a water outlet channel (104); the extension ring (312) is provided with an outflow hole (3121) for connecting the water outlet channel (104) and the water outlet waterway (103); the top plate (1 1) 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) 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); the diaphragm (22) is located at the pressure relief hole (113) and is used to control the opening and closing of the pressure relief hole (113).

4. The actuating pressure relief mechanism for an antifreeze solenoid valve according to claim 2, 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).

5. The actuating pressure relief mechanism for an antifreeze solenoid valve according to claim 3, characterized in that: There are two actuators (20) on the top plate (11), one of which is an electromagnetic actuator (201) and the other is a manual actuator (202).

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