Solenoid valve

Abstract

The present invention discloses a solenoid valve. When a control component controls a pilot channel to be connected with a water inlet channel, the water pressure in the pilot channel increases, the water pressure in the delayed flow channel remains unchanged, and the piston rod moves to a first position under the action of a water pressure difference. At this time, the solenoid valve has a large flow of water discharge, and the solenoid valve discharges water slowly to achieve the effect of preventing water hammer. When the control component controls the pilot channel to be disconnected from the water inlet channel, the water pressure in the pilot channel decreases, and the water pressure in the delayed flow channel remains unchanged. The piston rod moves to a second position under the action of a water pressure difference between the two channels to slowly disconnect the delayed channel from the water outlet channel. At this time, the solenoid valve stops water slowly to achieve the effect of preventing water hammer. At the same time, the water in the pilot channel can be discharged through a pressure relief hole to relieve pressure. Therefore, the solenoid valve can achieve the purpose of preventing water hammer regardless of whether it is in an open or closed state.

Description

Technical Field

[0001] The invention relates to the technical field of valve body structures, in particular to a solenoid valve structure. Background Art

[0002] Most of the existing solenoid valve structures realize the opening and closing of the internal flow channel by quickly withdrawing and inserting the solenoid valve head. However, in the actual use of the solenoid valve, in order to ensure the efficient and fast opening and closing of the faucet structure, the opening and closing valve heads of most solenoid valves work quickly, and because the size of the valve head needs to adapt to the size of the flow channel, the size and mass of the valve head are generally large. When the valve head is opened and closed, the larger size of the valve head produces a very large impact force, and there is no buffer structure in the structure. The abnormal sound generated by the collision between the valve head and the faucet structure is very obvious. In some cases, the vibration caused by the collision of the valve head may even affect the water pipe. This phenomenon is called water hammer. The noise problem caused at night or in crowded areas cannot be underestimated.

[0003] Alternatively, although there are some solenoid valve structures that can reduce the water hammer phenomenon, the structures are relatively complex and the cost is high. Summary of the invention

[0004] The present invention provides a solenoid valve, which overcomes the shortcomings of the background technology. The technical solution adopted by the present invention to solve the technical problem is:

[0005] Solenoid valve, which includes:

[0006] The valve body is provided with a water inlet channel, a pilot channel, a delayed flow channel, a connecting channel and a water outlet channel, the delayed channel is always connected to the water inlet channel, and the connecting channel is connected to the pilot channel, the delayed channel and the water outlet channel at the same time;

[0007] A piston rod is movably mounted in the connecting channel and moves between a first position connecting the delayed flow channel and the water outlet channel and a second position disconnecting the delayed flow channel and the water outlet channel, and the piston rod is also provided with a pressure relief hole, which can connect the pilot channel and the water outlet channel; and

[0008] A control component, which is mounted on the valve body and can control the opening and closing of the pilot channel and the water inlet channel;

[0009] When the control component controls the pilot channel to be connected with the water inlet channel, after the water in the water inlet channel flows through the pilot channel, the piston rod moves to the first position under the action of the water pressure difference between the pilot channel and the delayed flow channel, and the piston rod can connect or disconnect the pilot channel with the water outlet channel; when the control component controls the pilot channel to be disconnected from the water inlet channel, the piston rod moves to the second position under the action of the water pressure difference between the pilot channel and the delayed flow channel, and the piston rod disconnects the pilot channel from the water outlet channel.

[0010] In a preferred embodiment: the delayed flow channel is arranged in parallel with the leading flow channel, the connecting channel is arranged perpendicular to the delayed flow channel or the leading flow channel, and the moving direction of the piston rod is the same as the extending direction of the connecting channel.

[0011] In a preferred embodiment: one end of the connecting channel is connected to the pilot channel, and the other end is connected to the delayed flow channel, and the water outlet channel is connected to the middle part of the connecting channel.

[0012] In a preferred embodiment, a storage cavity is formed at the connection between one end of the communication channel and the pilot channel.

[0013] In a preferred embodiment: the piston rod includes a rod body, a first sealing portion and a second sealing portion, the first sealing portion and the second sealing portion are respectively fixedly connected to the two ends of the rod body; the two ends of the connecting channel are respectively provided with a first sealing surface and a second sealing surface, the first sealing portion can be sealed and cooperated with the first sealing surface to disconnect one end of the connecting channel from the middle of the connecting channel and thereby disconnect the delayed channel from the water outlet channel, the second sealing portion can be sealed and cooperated with the second sealing surface to disconnect the other end of the connecting channel from the middle of the connecting channel and thereby disconnect the pilot channel from the water outlet channel.

[0014] In a preferred embodiment, the solenoid valve further comprises a reset elastic member, and two ends of the reset elastic member respectively abut against an inner wall at one end of the connecting channel and between the first sealing portion.

[0015] In a preferred embodiment: a step is provided on the inner wall of one end of the connecting channel, and the first sealing surface is the top surface or the bottom surface of the step; the second sealing surface is the inner wall surface of the other end of the connecting channel close to the water outlet channel.

[0016] In a preferred embodiment, the force-bearing area of ​​the first sealing portion is smaller than the force-bearing area of ​​the second sealing portion.

[0017] In a preferred embodiment: a first sealing ring is disposed on the outer periphery of the first sealing portion, and a second sealing ring is disposed on the outer periphery of the second sealing portion.

[0018] In a preferred embodiment: the control component includes a solenoid valve head or a manual switch.

[0019] In a preferred embodiment: the valve body includes a first valve body, a second valve body, a first connecting pipe and a second connecting pipe, the water inlet channel and the control component are both arranged on the first valve body, the connecting channel and the water outlet channel are both arranged on the second valve body, a delayed flow channel is formed in the first connecting pipe, and its two ends are respectively connected to the first valve body and the second valve body and are connected to the water inlet channel and the connecting channel, respectively, a pilot channel is formed in the second connecting pipe, and its two ends are respectively connected to the first valve body and the second valve body and are connected to the water inlet channel and the connecting channel, respectively.

[0020] Compared with the background technology, this technical solution has the following advantages:

[0021] 1. When the control component controls the pilot channel to be connected with the water inlet channel, the water in the water inlet channel enters the pilot channel, the water pressure in the pilot channel increases, and the water pressure in the delayed flow channel remains unchanged. The piston rod moves to the first position under the action of the water pressure difference to connect the delayed channel with the water outlet channel. At this time, the solenoid valve has a large flow of water, and the slow water discharge of the solenoid valve is realized to achieve the effect of preventing water hammer. At the same time, the piston rod can open the pilot channel at the same time to discharge water at a larger flow rate, or the piston rod can not open the pilot channel, and the water in the pilot channel can be discharged through the pressure relief hole for pressure relief; when the control component controls the pilot channel to be disconnected from the water inlet channel, the water pressure in the pilot channel decreases, while the water pressure in the delayed flow channel remains unchanged. The piston rod moves to the second position under the action of the water pressure difference between the two channels to slowly disconnect the delayed channel from the water outlet channel. At this time, the slow water stopping of the solenoid valve is also achieved to achieve the effect of water hammer. At the same time, the water in the pilot channel can be discharged through the pressure relief hole for pressure relief. Therefore, the solenoid valve can achieve the purpose of preventing water hammer no matter it is in the open or closed state.

[0022] 2. The delayed flow channel is arranged in parallel with the pilot flow channel, the connecting channel is arranged perpendicular to the delayed flow channel or the pilot flow channel, and the moving direction of the piston rod is the same as the extending direction of the connecting channel, so that the solenoid valve structure is relatively regular and compact.

[0023] 3. One end of the connecting channel is connected to the pilot channel, and the other end is connected to the delayed flow channel. The water outlet channel is connected to the middle of the connecting channel, so that the entire section of the connecting channel has no redundant parts and the connection structure is more compact.

[0024] 4. A storage chamber is formed at the connection between one end of the connecting channel and the pilot channel. When the water of the water inlet channel enters the pilot channel, it can be stored in the storage chamber until the water pressure in the storage chamber applied to the piston rod is greater than the water pressure in the delayed flow channel, and the piston rod moves under the action of the water pressure difference. Conversely, when the water pressure in the delayed flow channel applied to the piston rod is greater than the water pressure in the storage chamber, the piston rod can move in the opposite direction. The storage chamber can further slow down the time for the delayed channel to be connected with the water outlet channel or disconnected, thereby achieving a better effect in preventing water hammer.

[0025] 5. When the solenoid valve is closed, the first sealing ring and the second sealing ring can ensure the sealing effect and prevent water leakage.

[0026] 6. When the water source is closed, that is, when there is no water pressure in the delay channel, the piston rod can be restored to the second position under the action of the reset elastic member to ensure that the solenoid valve is in a closed state when water pressure is present again.

[0027] 7. When the control component just controls the pilot channel to be disconnected from the water inlet channel, the water in the water inlet channel can still flow out from the water outlet through the delayed flow channel. The force area of ​​the first sealing part is smaller than the force area of ​​the second sealing part, which can extend the time for the piston rod to move to the second position, further improving the anti-water hammer effect.

[0028] 8. The control component includes a solenoid valve head and a manual switch, so that the solenoid valve can be opened and closed automatically or manually, and the control method is more diverse. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] Figure 1 An overall schematic diagram of a solenoid valve of a preferred embodiment is depicted.

[0031] Figure 2 One of the cross-sectional schematic diagrams of a solenoid valve according to a preferred embodiment is depicted.

[0032] Figure 3 A second cross-sectional view of a solenoid valve of a preferred embodiment is shown, in which the pilot channel is connected to the water inlet channel.

[0033] Figure 4 A second cross-sectional view of a solenoid valve according to a preferred embodiment is shown, in which the pilot channel is disconnected from the water inlet channel. DETAILED DESCRIPTION

[0034] Please refer to Figures 1 to 4 , a preferred embodiment of the solenoid valve, the solenoid valve comprises a valve body 10, a piston rod 20 and a control component 30.

[0035] The valve body 10 is provided with an inlet channel 11, a pilot channel 12, a delayed flow channel 13, a connecting channel 14 and an outlet channel 15. The delayed channel 13 is always connected to the inlet channel 11, and the connecting channel 14 is connected to the pilot channel 12, the delayed channel 13 and the outlet channel 15 at the same time.

[0036] In this embodiment, the valve body 10 includes a first valve body 101, a second valve body 102, a first connecting pipe 103 and a second connecting pipe 104, the water inlet channel 11 and the control component 30 are both arranged on the first valve body 101, the connecting channel 14 and the water outlet channel 15 are both arranged on the second valve body 102, a delayed flow channel 13 is formed in the first connecting pipe 103, and its two ends are respectively connected to the first valve body 101 and the second valve body 102 and connected to the water inlet channel 11 and the connecting channel 14, a pilot channel 12 is formed in the second connecting pipe 104, and its two ends are respectively connected to the first valve body 101 and the second valve body 102 and connected to the water inlet channel 11 and the connecting channel 14.

[0037] In this embodiment, the delayed flow channel 13 is arranged in parallel with the pilot flow channel 12, the connecting channel 14 is arranged perpendicular to the delayed flow channel 13 or the pilot flow channel 12, and the moving direction of the piston rod 20 is the same as the extending direction of the connecting channel 14. Figure 3 As shown, the delayed flow channel 13 and the pilot flow channel 12 are arranged vertically, the connecting channel 14 is arranged horizontally, and the movable direction of the piston rod 20 is the horizontal moving direction. One end of the connecting channel 14 is connected to the pilot channel 12, and the other end is connected to the delayed flow channel 13, and the water outlet channel 15 is connected to the middle of the connecting channel 14. As a result, the solenoid valve structure is relatively regular and compact.

[0038] In this embodiment, a storage chamber 16 is formed at the connection between one end of the connecting channel 14 and the pilot channel 12. When the water of the water inlet channel 11 enters the pilot channel 12, it can be stored in the storage chamber 16 until the water pressure in the storage chamber 16 received by the piston rod 20 is greater than the water pressure in the delayed flow channel 13, and the piston rod 20 moves under the action of the water pressure difference. On the contrary, when the water pressure in the delayed flow channel 13 received by the piston rod 20 is greater than the water pressure in the storage chamber 16, it can move in the opposite direction. The storage chamber 16 can further slow down the time of disconnection between the delayed channel 13 and the water outlet channel 15, so as to achieve a better effect of preventing water hammer. Preferably, the cross-sectional area of ​​the storage chamber 16 is greater than the cross-sectional area of ​​the pilot channel 12, so as to have a better water storage effect; or, the cross-sectional area of ​​the storage chamber 16 can also be the same as the cross-sectional area of ​​the pilot channel 12, but it is not limited thereto.

[0039] The piston rod 20 is movably installed in the connecting channel 14 and moves between a first position connecting the delayed flow channel 13 and the water outlet channel 15 and a second position disconnecting the delayed flow channel 13 and the water outlet channel 15. The piston rod 20 is also provided with a pressure relief hole 21, which can connect the pilot channel 12 and the water outlet channel 15.

[0040] In this embodiment, the piston rod 20 includes a rod body 22, a first sealing portion 23 and a second sealing portion 24, and the first sealing portion 23 and the second sealing portion 24 are respectively fixed at both ends of the rod body 22; the two ends of the connecting channel 14 are respectively provided with a first sealing surface 141 and a second sealing surface 142, the first sealing portion 23 can be sealed with the first sealing surface 141 to disconnect one end of the connecting channel 14 from the middle of the connecting channel 14 and thereby disconnect the delayed channel 13 from the water outlet channel 15, and the second sealing portion 24 can be sealed with the second sealing surface 142 to disconnect the other end of the connecting channel 14 from the middle of the connecting channel 14 and thereby disconnect the pilot channel 12 from the water outlet channel 15.

[0041] Specifically, Figure 4As shown, the inner wall of one end of the connecting channel 14 is provided with a step 143, and the first sealing surface 141 is the top surface of the step 143; as required, the first sealing surface 141 can also be in contact with the bottom surface of the step 143, but not limited thereto; the second sealing surface 142 is the inner wall surface of the other end of the connecting channel 14 close to the water outlet channel 15, that is, the outer periphery of the second sealing portion 24 is in direct close contact with the second sealing surface 142. Moreover, the bottom end of the second connecting pipe 104 extends into the connecting channel 14, so that the bottom end of the second connecting pipe 104 can limit the second sealing portion 24, thereby limiting the movable stroke of the piston rod 20, that is, the piston rod 20 moves between one end of the connecting channel 14 and the bottom end of the second connecting pipe 104.

[0042] In this embodiment, the force-bearing area of ​​the first sealing part 23 is smaller than the force-bearing area of ​​the second sealing part 24. Specifically, the force-bearing area of ​​the first sealing part 23 is the area of ​​its longitudinal section, and the force-bearing area of ​​the second sealing part 24 is the area of ​​its longitudinal section. When the control component 30 just controls the pilot channel 12 to be disconnected from the water inlet channel 11, the water in the water inlet channel 11 can still flow out of the water outlet channel 15 through the delayed flow channel 13. The force-bearing area of ​​the first sealing part 23 is smaller than the force-bearing area of ​​the second sealing part 24, which can extend the time for the piston rod 20 to move to the second position, further improving the anti-water hammer effect.

[0043] In this embodiment, a first sealing ring 231 is disposed on the outer periphery of the first sealing portion 23, and a second sealing ring 241 is disposed on the outer periphery of the second sealing portion 24. When the solenoid valve is closed, the first sealing ring 231 and the second sealing ring 241 can ensure a sealing effect to prevent water leakage.

[0044] In this embodiment, the solenoid valve further includes a reset elastic member 40, the two ends of which are respectively pressed against the inner wall of one end of the connecting channel 14 and between the first sealing portion 23. When the water source is turned off, that is, when there is no water pressure in the delay channel 13, the piston rod 20 can be restored to the second position under the action of the reset elastic member 40 to ensure that the solenoid valve is in a closed state when there is water pressure again.

[0045] The control component 30 is installed on the valve body 10 and can control the opening and closing of the pilot channel 12 and the water inlet channel 11. When the control component 30 controls the pilot channel 12 to be connected with the water inlet channel 11, after the water in the water inlet channel 11 flows through the pilot channel 12, the piston rod 20 moves to the first position under the action of the water pressure difference between the pilot channel 12 and the delayed flow channel 13, at which time the piston rod 20 can connect or disconnect the pilot channel 12 with the water outlet channel 15; when the control component 30 controls the pilot channel 12 to be disconnected from the water inlet channel 11, the piston rod 20 moves to the second position under the action of the water pressure difference between the pilot channel 12 and the delayed flow channel 13, and the piston rod 20 disconnects the pilot channel 12 from the water outlet channel 15.

[0046] In this embodiment, the control component 30 is a solenoid valve head, and the structure of the solenoid valve head is prior art and will not be described in detail. Alternatively, the control component 30 may also be a manual switch; or the control component 30 may include both a solenoid valve head and a manual switch, so that the solenoid valve can be opened and closed automatically or manually, and the control method is more diverse.

[0047] The working principle of the solenoid valve is:

[0048] The initial state of the solenoid valve is: the pilot channel 12 is disconnected from the water inlet channel 11, the first sealing portion 23 is sealed with the first sealing surface 141, the second sealing portion 24 is sealed with the second sealing surface 142, the second sealing portion 24 is against the bottom end of the second connecting pipe 104, and the delayed flow channel 13 is disconnected from the water outlet channel 15;

[0049] like Figure 3 As shown, when the control component 30 controls the pilot channel 12 to be connected with the water inlet channel 11, the water in the water inlet channel 11 enters the pilot channel 12 and the delayed flow channel 13 at the same time. Since the delayed flow channel 13 is disconnected from the water outlet channel 15 at this time, when the delayed channel 13 is full of water, no more water will enter. The water entering the pilot channel 12 is stored in the storage chamber 16. Only a small part of the water in the storage chamber 16 flows out to the water outlet channel 15 through the pressure relief hole 21 until the water pressure in the storage chamber 16 continues to increase, and the water pressure in the delayed flow channel 13 remains unchanged. The first sealing portion 23 is pushed to the right. The second sealing part 24 is subjected to a leftward thrust. When the leftward thrust exerted on the second sealing part 24 is greater than the rightward thrust exerted on the first sealing part 23, the piston rod 20 moves leftward to the first position under the action of the water pressure difference to connect the delay channel 13 with the water outlet channel 15. The first sealing part 23 leaves the first sealing surface 141, and the second sealing part 24 leaves the second sealing surface 142. At this time, the solenoid valve has a large flow of water outflow, realizing the slow water outflow of the solenoid valve to achieve the effect of preventing water hammer. At the same time, the piston rod 20 can simultaneously open the pilot channel 12 to discharge water at a larger flow rate.

[0050] like Figure 4As shown, when the control component 30 controls the pilot channel 12 to be disconnected from the water inlet channel 11, the water pressure of the pilot channel 12 is reduced, while the water pressure in the delayed flow channel 13 remains unchanged. When the rightward thrust received by the first sealing portion 23 is greater than the leftward thrust received by the second sealing portion 24, the piston rod 20 slowly moves to the right to the second position under the action of the water pressure difference to slowly disconnect the delayed channel 13 from the water outlet channel 15, until the first sealing portion 23 seals the first sealing surface 141 and the second sealing portion 24 seals the second sealing surface 142. At this time, the solenoid valve is also realized to slowly stop water to achieve the effect of water hammer. At the same time, the water in the pilot channel 12 can be discharged through the pressure relief hole 21 for pressure relief. Therefore, the solenoid valve can achieve the purpose of preventing water hammer regardless of whether it is in the open or closed state.

[0051] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of the present invention. That is, equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. Solenoid valve, characterized in that: It includes: The valve body is provided with a water inlet channel, a pilot channel, a delayed flow channel, a connecting channel and a water outlet channel, the delayed channel is always connected to the water inlet channel, and the connecting channel is connected to the pilot channel, the delayed channel and the water outlet channel at the same time; A piston rod is movably mounted in the connecting channel and moves between a first position connecting the delayed flow channel and the water outlet channel and a second position disconnecting the delayed flow channel and the water outlet channel, and the piston rod is also provided with a pressure relief hole, which can connect the pilot channel and the water outlet channel; and A control component, which is mounted on the valve body and can control the opening and closing of the pilot channel and the water inlet channel; When the control component controls the pilot channel to be connected with the water inlet channel, after the water in the water inlet channel flows through the pilot channel, the piston rod moves to the first position under the action of the water pressure difference between the pilot channel and the delayed flow channel, at which time the piston rod can connect or disconnect the pilot channel with the water outlet channel; when the control component controls the pilot channel to be disconnected from the water inlet channel, the piston rod moves to the second position under the action of the water pressure difference between the pilot channel and the delayed flow channel, and the piston rod disconnects the pilot channel from the water outlet channel; The piston rod includes a rod body, a first sealing portion and a second sealing portion, and the first sealing portion and the second sealing portion are respectively fixed at both ends of the rod body; the two ends of the connecting channel are respectively provided with a first sealing surface and a second sealing surface, the first sealing portion can be sealed and matched with the first sealing surface to disconnect one end of the connecting channel from the middle of the connecting channel and thereby disconnect the delayed channel from the water outlet channel, and the second sealing portion can be sealed and matched with the second sealing surface to disconnect the other end of the connecting channel from the middle of the connecting channel and thereby disconnect the pilot channel from the water outlet channel.

2. The solenoid valve according to claim 1, characterized in that: The delayed flow channel is arranged in parallel with the pilot flow channel, the connecting channel is arranged perpendicular to the delayed flow channel or the pilot flow channel, and the moving direction of the piston rod is the same as the extending direction of the connecting channel.

3. The solenoid valve according to claim 2, characterized in that: One end of the connecting channel is connected to the pilot channel, and the other end is connected to the delayed flow channel. The water outlet channel is connected to the middle part of the connecting channel.

4. The solenoid valve according to claim 3, characterized in that: A storage cavity is formed at the connection between one end of the connecting channel and the pilot channel.

5. The solenoid valve according to claim 1, characterized in that: The solenoid valve further comprises a resetting elastic member, two ends of which are respectively pressed against an inner wall at one end of the connecting channel and between the first sealing portion.

6. The solenoid valve according to claim 1, characterized in that: The inner wall of one end of the connecting channel is provided with a step, and the first sealing surface is the top surface or the bottom surface of the step; the second sealing surface is the inner wall surface of the other end of the connecting channel close to the water outlet channel.

7. The solenoid valve according to claim 1, characterized in that: The force-bearing area of ​​the first sealing portion is smaller than the force-bearing area of ​​the second sealing portion.

8. The solenoid valve according to claim 6, characterized in that: A first sealing ring is disposed on the outer periphery of the first sealing portion, and a second sealing ring is disposed on the outer periphery of the second sealing portion.

9. The solenoid valve according to any one of claims 1 to 8, characterized in that: The control component includes a solenoid valve head and a manual switch.

10. The solenoid valve according to any one of claims 1 to 8, characterized in that: The valve body includes a first valve body, a second valve body, a first connecting pipe and a second connecting pipe. The water inlet channel and the control component are both arranged on the first valve body, and the connecting channel and the water outlet channel are both arranged on the second valve body. A delayed flow channel is formed in the first connecting pipe, and its two ends are respectively connected to the first valve body and the second valve body and are connected to the water inlet channel and the connecting channel respectively. A pilot channel is formed in the second connecting pipe, and its two ends are respectively connected to the first valve body and the second valve body and are connected to the water inlet channel and the connecting channel respectively.

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