Water hammer proof solenoid valve

Abstract

The present invention discloses a water hammer solenoid valve. When a driving component controls the second water passage to be connected with the water inlet channel, the valve core can slowly open the first water passage under sufficient water pressure, and the first water passage is connected with the water outlet channel to discharge water; when the driving component controls the second water passage to be disconnected from the water inlet channel, the valve core can slowly close the first water passage under sufficient water pressure, and the first water passage is disconnected from the water outlet channel to stop water discharge, and the remaining water in the second water passage can flow through the buffer hole and then flow out from the water outlet channel. The solenoid valve is provided with two water passages, wherein the second water passage plays a leading role, and the second water passage can prolong the opening time of the first water passage, and can also prolong the closing time of the first water passage, so as to achieve the purpose of water hammer prevention; at the same time, the solenoid valve has a relatively simple and compact structure and low production cost.

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 water hammer prevention 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] The anti-water hammer solenoid valve comprises a water inlet channel, a first water passage channel, a second water passage channel, a valve core, a water outlet channel and a driving component capable of controlling the opening and closing of the water inlet channel and the second water passage channel, wherein the first water passage channel is always connected to the water inlet channel, the valve core is installed at the connection of the first water passage channel, the second water passage channel and the water outlet channel, and the valve core is provided with a buffer hole capable of connecting the second water passage channel and the water outlet channel;

[0006] When the driving component controls the second water passage to be connected to the water inlet passage, the valve core can slowly open the first water passage under sufficient water pressure, and the first water passage is connected to the water outlet passage to discharge water;

[0007] When the driving component controls the second water passage to be disconnected from the water inlet channel, the valve core can slowly close the first water passage under sufficient water pressure, and the first water passage is disconnected from the water outlet channel to stop water outlet, and the remaining water in the second water passage can flow through the buffer hole and then flow out from the water outlet channel.

[0008] In a preferred embodiment: the movement direction of the valve core is in the same direction as the extension direction of the second water flow channel. When the first water flow channel is connected to the water inlet channel, the direction of the resultant force on the valve core is away from the second water flow channel. When the first water flow channel is disconnected from the water inlet channel, the direction of the resultant force on the valve core is close to the second water flow channel.

[0009] In a preferred embodiment: the outlet of the first water passage is located on the side of the valve core, and the water outlet channel is coaxially arranged with the second water passage.

[0010] In a preferred embodiment: a buffer cavity is provided between the valve core and the second water passage, and the buffer hole is communicated with the second water passage and the buffer cavity.

[0011] In a preferred embodiment: the valve core includes a core rod and a sleeve, the sleeve is fixed on one side of the outlet of the first water passage, the core rod extends into the sleeve and can reciprocate relative to the sleeve, the buffer hole is arranged on the core rod, and the core rod is provided with a sealing part. When the sealing part abuts against the sleeve, the first water passage is closed, and when the sealing part leaves the sleeve, the first water passage is opened.

[0012] In a preferred embodiment: the core rod is also provided with a valve core water inlet and a valve core water outlet which is always connected to the water outlet channel and the buffer hole; the valve core water inlet is arranged on the side of the core rod and above the sealing portion; the valve core water outlet is arranged at the bottom end of the core rod; the sleeve is located above the first water passage; the valve core water inlet is connected to the valve core water outlet through the inside of the core rod.

[0013] In a preferred embodiment: the core rod includes a hollow core rod body and a first boss fixedly connected to the top end of the core rod body, the first boss is sealingly cooperated with the inner wall of the buffer cavity, the buffer hole passes through the first boss and is connected to the inside of the core rod body, the valve core water inlet and the valve core water outlet are respectively arranged on the side of the core rod body and the bottom end face of the core rod body, and the sealing part is fixedly connected to the outer periphery of the core rod body and is located below the first boss.

[0014] In a preferred embodiment: the buffer cavity is provided with a first step surface and a second step surface, and the first boss can be supported against the first step surface or the second step surface to axially limit the valve core.

[0015] In a preferred embodiment: the valve core also includes a sealing cylinder fixed on the other side of the first water passage, and a second boss is also provided on the outer periphery of the core rod body. The sealing cylinder is sleeved outside the core rod body and is sealingly and slidably matched with the second boss.

[0016] In a preferred embodiment: it also includes a reset elastic member, one end of which is connected to the bottom end of the core rod.

[0017] In a preferred embodiment: the driving component includes a solenoid valve head or a manual switch.

[0018] Compared with the background technology, this technical solution has the following advantages:

[0019] 1. When the second water passage is connected to the water inlet, the water in the water inlet first flows into the second water passage. When the water flowing into the second water passage generates sufficient water pressure, it can drive the valve core to move and then open the first water passage. At this time, the water in the water inlet can flow from the first water passage to the water outlet and from the second water passage through the buffer hole to the water outlet; when the second water passage is disconnected from the water inlet, the water in the water inlet only enters the first water passage. Under the action of the water pressure in the first water passage, the valve core is driven to move and then close the first water passage. At this time, the remaining water in the second water passage can flow through the buffer hole and then flow out of the water outlet to ensure pressure balance. The solenoid valve is provided with two water passages, of which the second water passage plays a leading role. The second water passage can extend the opening time of the first water passage, and can also extend the closing time of the first water passage to achieve the purpose of preventing water hammer; at the same time, the solenoid valve has a relatively simple and compact structure and low production cost.

[0020] 2. The moving direction of the valve core is in the same direction as the extending direction of the second water passage, which can reduce the lateral size of the solenoid valve. At the same time, the pressure in the second water passage directly acts on the valve core without turning or other additional strokes, making the valve core more sensitive to water pressure.

[0021] 3. The outlet of the first water passage is located on the side of the valve core, and the water outlet channel and the second water passage are coaxially arranged, making the solenoid valve more compact and more beautiful in appearance.

[0022] 4. A buffer cavity is provided between the valve core and the second water passage. When the solenoid valve is opened, water in the water inlet channel enters the second water passage and is stored in the buffer cavity. When the water in the buffer cavity is large enough to push the valve core to move, the first water passage is slowly opened. Similarly, when the solenoid valve is closed, the water in the first water passage drives the valve core to move and the buffer cavity is compressed. The water in the buffer cavity flows out from the buffer hole to relieve pressure. The buffer cavity can further slow down the opening or closing of the first water passage, and the effect of preventing water hammer is better.

[0023] 5. The valve core includes a core rod and a sleeve. The water pressure in the water channel is sensed through the hard core rod. The sensitivity of sensing water pressure is higher and it is easier to be within the controllable range.

[0024] 6. The water inlet of the valve core is connected with the water outlet of the valve core through the inside of the core rod, which can further reduce the size of the solenoid valve and make it more compact.

[0025] 7. The core rod is piston-type, its movement mode is the same as that of the piston, and its structure is simple.

[0026] 8. The first step surface and the second step surface can limit the axial position of the valve core to prevent the valve core from moving out of the water outlet channel when the water pressure is high.

[0027] 9. The valve core also includes a sealing cylinder. The core rod can move back and forth relative to the sealing cylinder, but the outer periphery of the core rod and the sealing cylinder always maintain a sealed state, so that the size of the core rod can be designed to be smaller, reducing costs.

[0028] 10. The resetting elastic member can reset the core rod when the water pressure is zero, so as to reset the core rod to the state of the bottom end surface of the sealing sleeve of its sealing part. 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 water hammer prevention solenoid valve according to a preferred embodiment is shown.

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

[0032] Figure 3 A second cross-sectional schematic diagram of a water hammer prevention solenoid valve according to a preferred embodiment is shown. At this time, the valve core is in a position to open the first water passage.

[0033] Figure 4 A second cross-sectional schematic diagram of a water hammer prevention solenoid valve according to a preferred embodiment is shown. At this time, the valve core is in a position to close the first water passage.

[0034] Figure 5 A cross-sectional view of the core rod is shown. DETAILED DESCRIPTION

[0035] Please refer to Figures 1 to 5 A preferred embodiment of a water hammer prevention solenoid valve, the water hammer prevention solenoid valve comprises a water inlet channel 10, a first water flow channel 20, a second water flow channel 30, a valve core, a water outlet channel 40 and a driving component capable of controlling the opening and closing of the water inlet channel 10 and the second water flow channel 30.

[0036] The first water passage 20 is always connected with the water inlet passage 10, the valve core is installed at the connection of the first water passage 20, the second water passage 30 and the water outlet passage 40, and the valve core is provided with a buffer hole 50 that can connect the second water passage 30 with the water outlet passage 40;

[0037] When the driving component controls the second water passage 30 to be connected to the water inlet passage 10, the valve core can slowly open the first water passage 20 under sufficient water pressure, and the first water passage 20 is connected to the water outlet passage 40 to discharge water;

[0038] When the driving component controls the second water passage 30 to be disconnected from the water inlet channel 10, the valve core can slowly close the first water passage 20 under sufficient water pressure, and the first water passage 20 is disconnected from the water outlet channel 40 to stop water discharge. The remaining water in the second water passage 30 can flow through the buffer hole 50 and then flow out from the water outlet channel 40.

[0039] The solenoid valve comprises a first body 101, a second body 102, a first connecting pipe 103 and a second connecting pipe 104, the water inlet channel 10 and the driving component are both arranged in the first body 101, the water outlet channel 40 and the valve core are both arranged in the second body 102, the first connecting pipe 103 is connected to the first body 101 and the second body 102 at both ends, and the second connecting pipe 104 is connected to the first body 101 and the second body 102 at both ends, wherein the first connecting pipe 103 forms the first water passage 20 inside, and the second connecting pipe 104 forms the second water passage 30 inside. Figure 1 and Figure 2 As shown, the first water passage 20 is L-shaped, its inlet is connected to the water inlet channel 10, and its outlet corresponds to the valve core. The lower part of the second connecting pipe 104 is connected to the second body 102 by a thread, and its upper part is smaller than its lower part, and its upper part is sealed and plugged with the first body 101. The second water passage 30 is parallel to the vertical section of the first water passage 20.

[0040] In this embodiment, the movement direction of the valve core is in the same direction as the extension direction of the second water passage 30. When the first water passage 20 is connected to the water inlet channel 10, the direction of the combined force on the valve core is away from the second water passage 30. When the first water passage 20 is disconnected from the water inlet channel 10, the direction of the combined force on the valve core is close to the second water passage 30. The movement direction of the valve core is in the same direction as the extension direction of the second water passage 30, which can reduce the lateral size of the solenoid valve. At the same time, the direct action in the second water passage 30 on the valve core does not require other additional strokes such as turning, so that the valve core has a higher sensitivity to water pressure. The outlet of the first water passage 20 is located on the side of the valve core, and the water outlet channel 40 is coaxially arranged with the second water passage 30, so that the structure of the solenoid valve is more compact and the appearance is more beautiful.

[0041] In this embodiment, a buffer cavity 60 is provided between the valve core and the second water passage 30, and the buffer hole 50 is connected to the second water passage 30 and the buffer cavity 60. Moreover, the cross section of the buffer cavity 60 is larger than the cross-sectional area of ​​the second water passage 30, so that the buffer cavity 60 has sufficient water storage function. According to needs, the buffer cavity 60 may not be provided, and the size or length of the second water passage 30 may be increased, which can also realize the water storage function and achieve the effect of slow opening and closing. A buffer cavity 60 is provided between the valve core and the second water passage 30. When the solenoid valve is opened, water in the water inlet channel 10 enters the second water passage 30 and is stored in the buffer cavity 60. When the water in the buffer cavity 60 is large enough to push the valve core to move, the first water passage 20 is slowly opened. Similarly, when the solenoid valve is closed, the water in the first water passage 20 drives the valve core to move and the buffer cavity 60 is compressed. The water in the buffer cavity 60 flows out from the buffer hole 50 to relieve pressure. The buffer cavity 60 can further slow down the opening or closing of the first water passage 20, and the effect of preventing water hammer is better.

[0042] In this embodiment, the valve core includes a core rod 70 and a sleeve 80, the sleeve 80 is fixed on one side of the outlet of the first water passage 20, the core rod 70 extends into the sleeve 80 and can reciprocate relative to the sleeve 80, the buffer hole 50 is provided on the core rod 70, the core rod 70 is provided with a sealing portion 71, when the sealing portion 71 is against the sleeve 80, the first water passage 20 is closed, when the sealing portion 71 leaves the sleeve 80, the first water passage 20 is opened. The valve core includes a core rod 70 and a sleeve 80, and the hard core rod 70 senses the water pressure in the waterway, and the sensitivity of the sensing water pressure is higher and easier to be within a controllable range.

[0043] In this embodiment, the core rod 70 is further provided with a valve core water inlet 72 and a valve core water outlet 73 which is always connected to the water outlet channel 40 and the buffer hole 50. The valve core water inlet 72 is arranged on the side of the core rod 70 and above the sealing portion 71, and the valve core water outlet 73 is arranged at the bottom end of the core rod 70. The sleeve 80 is located above the first water passage 20, and the valve core water inlet 72 is connected to the valve core water outlet 73 through the inside of the core rod 70. The valve core water inlet 72 is connected to the valve core water outlet 73 through the inside of the core rod 70, which can further reduce the size of the solenoid valve and make it more compact.

[0044] In this embodiment, the core rod 70 includes a hollow core rod body 74 and a first boss 75 fixed to the top of the core rod body 74. The first boss 75 is in sealing and movable cooperation with the inner wall of the buffer cavity 60. The buffer hole 50 passes through the first boss 75 and is connected to the inside of the core rod body 74. The valve core water inlet 72 and the valve core water outlet 73 are respectively arranged on the side of the core rod body 74 and the bottom end surface of the core rod body 74. The sealing portion 71 is fixed to the outer periphery of the core rod body 74 and is located below the first boss 75. The core rod 70 is piston-type, and its movement mode is the same as that of a piston, and its structure is simple.

[0045] In this embodiment, the buffer cavity 60 is provided with a first step surface 61 and a second step surface 62, and the first boss 75 can be reliably abutted against the first step surface 61 or the second step surface 62 to limit the spool axially, thereby preventing the spool from moving out of the water outlet channel 40 when the water pressure is high. Specifically, the first step surface 61 is the bottom end surface of the second connecting pipe 104, and the second step surface 62 is the top end surface of the sleeve 80.

[0046] In this embodiment, the valve core further includes a sealing cylinder 90 fixed on the other side of the first water passage 20, and the outer periphery of the core rod body 74 is further provided with a second boss 76, and the sealing cylinder 90 is sleeved outside the core rod body 74 and is sealingly slidably matched with the second boss 76. The valve core further includes the sealing cylinder 90, and the core rod 70 can reciprocate relative to the sealing cylinder 90, but the outer periphery of the core rod 70 and the sealing cylinder 90 are always kept in a sealed state, so that the size of the core rod 70 can be designed to be smaller, thereby reducing the cost.

[0047] In this embodiment, the solenoid valve further includes a reset elastic member 91, one end of which is connected to the bottom end of the core rod 70. The reset elastic member 91 is suitable for environments where the water pressure is relatively unstable. If the water pressure in the water inlet channel 10 can be guaranteed to be constant, the reset elastic member 91 may not be provided. The reset elastic member 91 can reset the core rod 70 when the water pressure is zero, so as to reset the core rod 70 to a state where its sealing portion 71 is sealed in the sleeve 80.

[0048] In this embodiment, the driving component includes a solenoid valve head 105, or a manual switch (not shown) can also be provided to jointly control the opening and closing of the second water passage 30 and the water inlet passage 10, but the present invention is not limited thereto. The structure of the solenoid valve head 105 is prior art and will not be described in detail.

[0049] The working principle of the solenoid valve is:

[0050] like Figure 3As shown, the solenoid valve head 105 is opened, the second water passage 30 is connected with the water inlet passage 10, and the water in the water inlet passage 10 enters the buffer cavity 60 after passing through the second water passage 30. Part of the water in the buffer cavity 60 will flow from the buffer hole 50 through the core rod 70 to the water outlet passage 40, but due to the small size of the buffer hole 50, the amount of water flowing out is much smaller than the amount of water flowing into the second water passage 30. The buffer cavity 60 begins to store water until the water pressure of the stored water can drive the core rod 70 to move downward. The core rod 70 moves slowly downward under the action of the water pressure, and at the same time drives the sealing part 71 to leave the sleeve 80. At this time, the water in the first water passage 20 can enter the sleeve 80, and enter the core rod body 74 from the valve core water inlet 72, and then flow from the valve core water outlet 73 to the water outlet passage 40, and then flow out from the water outlet passage 40;

[0051] like Figure 4 As shown, the solenoid valve head 105 is closed, and the second water passage 30 is disconnected from the water inlet channel 10, so that the water pressure in the buffer cavity 60 is reduced instantly, and the water in the first water passage 20 flows out from its outlet and flows upward to apply an upward force to the core rod 70, and the remaining water in the buffer cavity 60 will flow through the buffer hole 50 to the water outlet channel 40 and then flow out. When the direction of the combined force applied to the core rod 70 is upward, the core rod 70 moves upward, thereby compressing the buffer cavity 60, and further discharging the remaining water in the buffer cavity 60 from the buffer hole 50 until the sealing portion 71 is sealed in the sleeve 80, and the first water passage 20 is disconnected from the valve core water inlet 72, at which time the first water passage 20 stops discharging water.

[0052] The provision of the second water passage 30 and the buffer cavity 60 can slow down the opening or closing time of the first water passage 20 and play a role in preventing water hammer.

[0053] 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. Anti-water hammer solenoid valve, Features: It includes a water inlet channel, a first water passage channel, a second water passage channel, a valve core, a water outlet channel, and a driving component capable of controlling the opening and closing of the water inlet channel and the second water passage channel. The first water passage channel is always connected to the water inlet channel. The valve core is installed at the connection of the first water passage channel, the second water passage channel and the water outlet channel, and the valve core is provided with a buffer hole capable of connecting the second water passage channel and the water outlet channel. When the driving component controls the second water passage to be connected to the water inlet passage, the valve core can slowly open the first water passage under sufficient water pressure, and the first water passage is connected to the water outlet passage to discharge water; When the driving component controls the second water passage to be disconnected from the water inlet passage, the valve core can slowly close the first water passage under sufficient water pressure, and the first water passage is disconnected from the water outlet passage to stop water outlet, and the remaining water in the second water passage can flow through the buffer hole and then flow out from the water outlet passage; The movement direction of the valve core is the same as the extension direction of the second water passage; The outlet of the first water passage is located on the side of the valve core, and the water outlet channel is coaxially arranged with the second water passage; The valve core includes a core rod and a sleeve, the sleeve is fixed on one side of the outlet of the first water passage, the core rod extends into the sleeve and can reciprocate relative to the sleeve, the buffer hole is arranged on the core rod, the core rod is provided with a sealing part, when the sealing part abuts against the sleeve, the first water passage is closed, when the sealing part leaves the sleeve, the first water passage is opened; The core rod is also provided with a valve core water inlet and a valve core water outlet which is always connected with the water outlet channel and the buffer hole. The valve core water inlet is arranged on the side of the core rod and above the sealing part. The valve core water outlet is arranged at the bottom end of the core rod. The sleeve is located above the first water passage. The valve core water inlet is connected with the valve core water outlet through the inside of the core rod.

2. The water hammer proof solenoid valve according to claim 1, Features: When the second water passage is connected to the water inlet passage, the direction of the resultant force on the valve core is away from the second water passage; when the second water passage is disconnected from the water inlet passage, the direction of the resultant force on the valve core is close to the second water passage.

3. The water hammer proof solenoid valve according to claim 1, Features: A buffer cavity is provided between the valve core and the second water passage, and the buffer hole is communicated with the second water passage and the buffer cavity.

4. The water hammer proof solenoid valve according to claim 1, Features: The core rod includes a hollow core rod body and a first boss fixedly connected to the top end of the core rod body. The first boss is in sealing cooperation with the inner wall of the buffer cavity. The buffer hole passes through the first boss and is connected to the inside of the core rod body. The valve core water inlet and the valve core water outlet are respectively arranged on the side of the core rod body and the bottom end surface of the core rod body. The sealing part is fixedly connected to the outer periphery of the core rod body and is located below the first boss.

5. The water hammer proof solenoid valve according to claim 4, Features: The buffer cavity is provided with a first step surface and a second step surface, and the first boss can abut against the first step surface or the second step surface to limit the axial position of the valve core.

6. The water hammer proof solenoid valve according to claim 4, Features: The valve core also includes a sealing cylinder fixed on the other side of the first water passage, and a second boss is also provided on the outer periphery of the core rod body. The sealing cylinder is sleeved outside the core rod body and is sealingly and slidably matched with the second boss.

7. The water hammer proof solenoid valve according to claim 1, Features: It also includes a reset elastic member, one end of which is connected to the bottom end of the core rod.

8. The water hammer proof solenoid valve according to any one of claims 1 to 7, Features: The driving component comprises a solenoid valve head.

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