CN113833903A

CN113833903A - Electromagnetic valve for preventing water hammer

Info

Publication number: CN113833903A
Application number: CN202010512622.8A
Authority: CN
Inventors: 王天明; 马清水; 兰新禄; 祝传宝
Original assignee: Xiamen Lota International Co Ltd
Current assignee: Xiamen Lota International Co Ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2021-12-24

Abstract

The invention discloses a water hammer-proof electromagnetic valve.A valve core can slowly open a first water passing channel under the action of sufficient water pressure when a driving part controls a second water passing channel to be communicated with a water inlet channel, and the first water passing channel is communicated with a water outlet channel to discharge water; when the driving part controls the second water passing channel to be disconnected with the water inlet channel, the valve core can slowly close the first water passing channel under the action of sufficient water pressure, the first water passing channel is disconnected with the water outlet channel to stop water outlet, and residual water in the second water passing channel can flow through the small buffer holes and then flows out of the water outlet channel. The electromagnetic valve is provided with two water passing channels, wherein the second water passing channel plays a pilot role, and the second water passing channel can prolong the opening time of the first water passing channel and can also prolong the closing time of the first water passing channel, so that the aim of preventing the water hammer is fulfilled; meanwhile, the electromagnetic valve is simple and small in structure and low in production cost.

Description

Electromagnetic valve for preventing water hammer

Technical Field

The invention relates to the technical field of valve body structures, in particular to an electromagnetic valve structure.

Background

Current solenoid valve structure, the break-make that realizes inside runner is taken out and inserted through the quick of solenoid valve head mostly, however in the solenoid valve in-service use process, in order to guarantee the high-efficient quick break-make of leading structure, the break-make valve head operating speed of most solenoid valves is fast, and because the size of valve head needs the size of adaptation runner, causes valve head size and quality generally great. When the valve head is opened and closed, the work of the valve head with a large size generates a very large impact force, and a buffer structure is not arranged in the structure, abnormal sound generated by the impact of the valve head and the water faucet structure is very obvious, the vibration generated by the impact of the valve head even can influence the water pipe under partial conditions, the phenomenon is a water hammer phenomenon, and the noise problem caused by night or people living areas can not be small and varied.

Or, although there are some electromagnetic valve structures for reducing the water hammer phenomenon, the structure is more complex and the cost is high.

Disclosure of Invention

The invention provides a water hammer-proof electromagnetic valve which overcomes the defects in the prior art. The technical scheme adopted by the invention for solving the technical problems is as follows:

the water hammer prevention electromagnetic valve comprises a water inlet channel, a first water passing channel, a second water passing channel, a valve core, a water outlet channel and a driving part capable of controlling the on-off of the water inlet channel and the second water passing channel, wherein the first water passing channel is always communicated with the water inlet channel;

when the driving part controls the second water passing channel to be communicated with the water inlet channel, the valve core can slowly open the first water passing channel under the action of sufficient water pressure, and the first water passing channel is communicated with the water outlet channel to discharge water;

when the driving part controls the second water passing channel to be disconnected with the water inlet channel, the valve core can slowly close the first water passing channel under the action of sufficient water pressure, the first water passing channel is disconnected with the water outlet channel to stop water outlet, and residual water in the second water passing channel can flow through the small buffer holes and then flows out of the water outlet channel.

In a preferred embodiment: the moving direction of the valve core is the same as the extending direction of the second water passing channel, the resultant force direction of the valve core is the direction far away from the second water passing channel when the first water passing channel is communicated with the water inlet channel, and the resultant force direction of the valve core is the direction close to the second water passing channel when the first water passing channel is disconnected with the water inlet channel.

In a preferred embodiment: the outlet of the first water passing channel is positioned on the side face of the valve core, and the water outlet channel and the second water passing channel are coaxially arranged.

In a preferred embodiment: and a buffer cavity is arranged between the valve core and the second water passing channel, and the small buffer hole is communicated with the second water passing channel and the buffer cavity.

In a preferred embodiment: the valve core comprises a core rod and a sleeve, the sleeve is fixed on one side of an outlet of the first water passing channel, the core rod extends into the sleeve and can move in a reciprocating mode relative to the sleeve, the buffer small hole is formed in the core rod, the core rod is provided with a sealing portion, the first water passing channel is closed when the sealing portion abuts against the interior of the sleeve, and the first water passing channel is opened when the sealing portion leaves the sleeve.

In a preferred embodiment: the core bar is also provided with a valve core water inlet and a valve core water outlet which is always communicated with the water outlet channel and the small buffer hole, the valve core water inlet is arranged on the side surface of the core bar and is positioned above the sealing part, the valve core water outlet is arranged at the bottom end of the core bar, the sleeve is positioned above the first water passing channel, and the valve core water inlet is communicated with the valve core water outlet through the interior of the core bar.

In a preferred embodiment: the core rod comprises 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 seal movable fit with the inner wall of the buffer cavity, the buffer small hole penetrates through the first boss and is communicated with the interior of the core rod body, the valve core water inlet and the valve core water outlet are respectively arranged on the side face and the bottom end face of the core rod body, and the sealing part is fixedly connected to the periphery of the core rod body and is located below the first boss.

In a preferred embodiment: 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 axially limit the valve core.

In a preferred embodiment: the valve core further comprises a sealing cylinder fixed on the other side of the first water passing channel, a second boss is further arranged on the periphery of the core rod body, and the sealing cylinder is sleeved outside the core rod body and is in sealing sliding fit with the second boss.

In a preferred embodiment: still include the elastic component that resets, this elastic component one end that resets links to each other with the core bar bottom.

In a preferred embodiment: the driving part comprises a valve head of a solenoid valve or a manual switch.

Compared with the background technology, the technical scheme has the following advantages:

1. when the second water passing channel is communicated with the water inlet channel, water in the water inlet channel firstly flows into the second water passing channel, and when water flowing into the second water passing channel generates enough water pressure, the valve core can be driven to move so as to open the first water passing channel, and at the moment, water in the water inlet channel can flow from the first water passing channel to the water outlet channel and can flow from the second water passing channel to the water outlet channel after flowing through the small buffer holes; when the second water passing channel is disconnected with the water inlet channel, water in the water inlet channel only enters the first water passing channel, the valve core is driven to move under the action of water pressure in the first water passing channel so as to close the first water passing channel, and at the moment, residual water in the second water passing channel can flow through the small buffer holes and then flows out of the water outlet channel so as to ensure pressure balance. The electromagnetic valve is provided with two water passing channels, wherein the second water passing channel plays a pilot role, and the second water passing channel can prolong the opening time of the first water passing channel and can also prolong the closing time of the first water passing channel, so that the aim of preventing the water hammer is fulfilled; meanwhile, the electromagnetic valve is simple and small in structure and low in production cost.

2. The moving direction of the valve core is the same as the extending direction of the second water passing channel, the transverse size of the electromagnetic valve can be reduced, meanwhile, the second water passing channel directly acts on the valve core without turning and other extra strokes, and the sensitivity of the valve core for sensing water pressure is higher.

3. The outlet of the first water passing channel is positioned on the side face of the valve core, and the water outlet channel and the second water passing channel are coaxially arranged, so that the electromagnetic valve is more compact in structure and more attractive in appearance.

4. A buffer cavity is arranged between the valve core and the second water passing channel, when the electromagnetic valve is opened, water in the water inlet channel enters the second water passing channel and then is stored in the buffer cavity, and when the water in the buffer cavity is too much, the valve core can be pushed to move, and the first water passing channel is slowly opened; in a similar way, when the electromagnetic valve is closed, the water in the first water passing channel drives the valve core to move, the buffer cavity is compressed, water in the buffer cavity flows out from the buffer small hole to be decompressed, the buffer cavity can further slow down the opening or closing of the first water passing channel, and the effect of the waterproof hammer is better.

5. The valve core comprises a core rod and a sleeve, water pressure in the water channel is sensed through the hard core rod, the sensitivity of sensing the water pressure is higher, and the valve core is easier to control within a controllable range.

6. The water inlet of the valve core is communicated with the water outlet of the valve core through the interior of the core rod, so that the size of the electromagnetic valve can be further reduced, and the electromagnetic valve is more compact.

7. The core rod is of a piston type, the movement mode of the core rod is the same as that of the piston, and the structure is simple.

8. The first step surface and the second step surface can axially limit the valve core, and the valve core is prevented from moving out of the water outlet channel when the water pressure is high.

9. The valve core also comprises a sealing cylinder, and the core rod can reciprocate relative to the sealing cylinder, but the periphery of the core rod and the sealing cylinder always keep a sealing state, so that the size of the core rod can be designed to be smaller, and the cost is reduced.

10. The reset elastic piece can reset the core bar when the water pressure is zero so as to reset the core bar to the state that the sealing part of the core bar seals the bottom end face of the sleeve.

Drawings

The invention is further illustrated by the following figures and examples.

Fig. 1 is an overall schematic view of a water hammer prevention solenoid valve according to a preferred embodiment.

Fig. 2 is a schematic cross-sectional view of the solenoid valve for preventing water hammer according to a preferred embodiment.

Fig. 3 is a second schematic sectional view of the solenoid valve for preventing water hammer according to the preferred embodiment. At this time, the valve core is in a position for opening the first water passing channel.

Fig. 4 is a second schematic sectional view of the solenoid valve for preventing water hammer according to the preferred embodiment. At this time, the valve core is in a position for closing the first water passing channel.

FIG. 5 depicts a cross-sectional view of the core pin.

Detailed Description

Referring to fig. 1 to 5, a preferred embodiment of the water hammer prevention solenoid valve includes a water inlet passage 10, a first water passage 20, a second water passage 30, a valve core, a water outlet passage 40, and a driving member capable of controlling the water inlet passage 10 and the second water passage 30 to be connected or disconnected.

The first water passing channel 20 is always communicated with the water inlet channel 10, the valve core is arranged at the joint of the first water passing channel 20, the second water passing channel 30 and the water outlet channel 40, and the valve core is provided with a small buffer hole 50 which can communicate the second water passing channel 30 and the water outlet channel 40;

when the driving part controls the second water passing channel 30 to be communicated with the water inlet channel 10, the valve core can slowly open the first water passing channel 20 under the action of sufficient water pressure, and the first water passing channel 20 is communicated with the water outlet channel 40 to discharge water;

when the driving part controls the second water passing channel 30 to be disconnected with the water inlet channel 10, the valve core can slowly close the first water passing channel 20 under the action of sufficient water pressure, the first water passing channel 20 is disconnected with the water outlet channel 40 to stop water outlet, and residual water in the second water passing channel 30 can flow through the small buffer hole 50 and then flow out of the water outlet channel 40.

The electromagnetic valve comprises a first body 101, a second body 102, a first connecting pipe 103 and a second connecting pipe 104, wherein a water inlet channel 10 and a driving part are arranged on the first body 101, a water outlet channel 40 and a valve core are arranged on the second body 102, two ends of the first connecting pipe 103 are respectively connected with the first body 101 and the second body 102, two ends of the second connecting pipe 104 are respectively connected with the first body 101 and the second body 102, wherein the first water passing channel 20 is formed inside the first connecting pipe 103, and the second water passing channel 30 is formed inside the second connecting pipe 104. As shown in fig. 1 and 2, the first water passage 20 is L-shaped, and has an inlet connected to the water inlet passage 10 and an outlet corresponding to the valve core. The lower part of the second connecting pipe 104 is connected with the second body 102 through screw threads, the size of the upper part of the second connecting pipe is smaller than that of the lower part of the second connecting pipe, and the upper part of the second connecting pipe is in sealed splicing fit with the first body 101. The second water passing channel 30 is parallel to the vertical section of the first water passing channel 20.

In this embodiment, the moving direction of the valve core is the same as the extending direction of the second water passing channel 30, the direction of the resultant force applied to the valve core when the first water passing channel 20 is communicated with the water inlet channel 10 is the direction away from the second water passing channel 30, and the direction of the resultant force applied to the valve core when the first water passing channel 20 is disconnected from the water inlet channel 10 is the direction close to the second water passing channel 30. The moving direction of the valve core is the same as the extending direction of the second water passing channel 30, the transverse size of the electromagnetic valve can be reduced, and meanwhile, the second water passing channel 30 directly acts on the valve core without turning and other extra strokes, so that the sensitivity of the valve core for sensing water pressure is higher. The outlet of the first water passing channel 20 is positioned on the side surface of the valve core, and the water outlet channel 40 and the second water passing channel 30 are coaxially arranged, so that the electromagnetic valve is more compact in structure and more attractive in appearance.

In this embodiment, a buffer cavity 60 is arranged between the valve core and the second water passing channel 30, and the small buffer hole 50 is communicated with both the second water passing channel 30 and the buffer cavity 60. And, the cross section of the buffering cavity 60 is larger than the cross-sectional area of the second water passing channel 30, so that the buffering cavity 60 has a sufficient water storage function. According to the requirement, the buffering cavity 60 can be omitted, and the size or the length of the second water passing channel 30 can be increased, so that the water storage function can be realized, and the effect of slow opening and closing is achieved. A buffer cavity 60 is arranged between the valve core and the second water passing channel 30, when the electromagnetic valve is opened, water in the water inlet channel 10 enters the second water passing channel 30 and then is stored in the buffer cavity 60, and when the water in the buffer cavity 60 is too much to push the valve core to move, the first water passing channel 20 is slowly opened; similarly, when the electromagnetic valve is closed, the water in the first water passing channel 20 moves the valve core, the buffer cavity 60 is compressed, the water in the buffer cavity 60 flows out of the buffer small hole 50 to be decompressed, the buffer cavity 60 can further slow down the opening or closing of the first water passing channel 20, and the effect of the water hammer is better.

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 small hole 50 is arranged on the core rod 70, the core rod 70 is provided with a sealing part 71, the first water passage 20 is closed when the sealing part 71 abuts against the sleeve 80, and the first water passage 20 is opened when the sealing part 71 leaves the sleeve 80. The valve core comprises a core rod 70 and a sleeve 80, the water pressure in the water channel is sensed through the hard core rod 70, the sensitivity of sensing the water pressure is higher, and the valve core is easier to be in a controllable range.

In this embodiment, the core bar 70 is further provided with a valve core water inlet 72 and a valve core water outlet 73 which is always communicated with the water outlet channel 40 and the small buffer hole 50, the valve core water inlet 72 is arranged on the side surface of the core bar 70 and is positioned above the sealing portion 71, the valve core water outlet 73 is arranged at the bottom end of the core bar 70, the sleeve 80 is positioned above the first water passing channel 20, and the valve core water inlet 72 is communicated with the valve core water outlet 73 through the inside of the core bar 70. The valve core water inlet 72 is communicated with the valve core water outlet 73 through the interior of the core rod 70, so that the size of the electromagnetic valve can be further reduced, and the electromagnetic valve is more compact.

In this embodiment, the core rod 70 includes a hollow core rod body 74 and a first boss 75 fixedly connected to the top end of the core rod body 74, the first boss 75 is movably fitted to the inner wall of the buffer cavity 60 in a sealing manner, the buffer small hole 50 penetrates through the first boss 75 and is communicated with the inside of the core rod body 74, the valve core water inlet 72 and the valve core water outlet 73 are respectively disposed on the side surface of the core rod body 74 and the bottom end surface of the core rod body 74, and the sealing portion 71 is fixedly connected to the periphery of the core rod body 74 and is located below the first boss 75. The core rod 70 is piston-type, and has the same movement mode as the piston, and simple structure.

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 abut against the first step surface 61 or the second step surface 62 to axially limit the valve core, so as to prevent the valve core from moving out of the water passage 40 when the water pressure is high. Specifically, the first step surface 61 is a bottom end surface of the second connecting pipe 104, and the second step surface 62 is a top end surface of the sleeve 80.

In this embodiment, the valve core further includes a sealing cylinder 90 fixed on the other side of the first water passing channel 20, the second boss 76 is further disposed on the outer periphery of the core rod body 74, and the sealing cylinder 90 is sleeved outside the core rod body 74 and is in sealing sliding fit with the second boss 76. The valve core also comprises a sealing cylinder 90, the core rod 70 can reciprocate relative to the sealing cylinder 90, but the sealing state is always kept between the periphery of the core rod 70 and the sealing cylinder 90, so that the size of the core rod 70 can be designed to be smaller, and the cost is reduced.

In this embodiment, the solenoid valve further includes a return elastic member 91, and one end of the return elastic member 91 is connected to the bottom end of the core rod 70. This elastic component 91 that resets is fit for in the comparatively unstable environment of water pressure, if can guarantee that the water pressure in inhalant canal 10 is invariable, then this elastic component 91 that resets also can not set up. The restoring elastic member 91 restores the stem 70 when the water pressure is zero to restore the stem 70 to a state where the sealing portion 71 thereof is sealed in the sleeve 80.

In this embodiment, the driving component includes a solenoid valve head 105, or a manual switch (not shown in the figure) may be further provided to control the on/off of the second water channel 30 and the water inlet channel 10 together, which is not limited to this. The structure of the electromagnetic valve head 105 is prior art and will not be described in detail.

The working principle of the electromagnetic valve is as follows:

as shown in fig. 3, the valve head 105 of the electromagnetic valve is opened, the second water passage 30 is communicated with the water inlet passage 10, water in the water inlet passage 10 enters the buffer cavity 60 after passing through the second water passage 30, part of water in the buffer cavity 60 flows through the interior of the core rod 70 from the buffer small hole 50 and flows to the water outlet passage 40, but because the size of the buffer small hole 50 is smaller, the amount of water flowing out is far smaller than that flowing in the second water passage 30, the water in the buffer cavity 60 starts to be stored until the water pressure of the stored water can drive the core rod 70 to move downwards, the core rod 70 slowly moves downwards under the action of the water pressure and 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 core water inlet 72, then flows to the water outlet passage 40 from the core water outlet 73, and then flows out from the water outlet passage 40;

as shown in fig. 4, the valve head 105 of the electromagnetic valve is closed, the second water passage 30 is disconnected from the water inlet passage 10, so that the water pressure in the buffer cavity 60 is instantaneously reduced, the water in the first water passage 20 flows upwards after flowing out from the outlet thereof to apply an upward force to the core rod 70, the residual water in the buffer cavity 60 flows to the water outlet passage 40 through the buffer small hole 50 and then flows out, when the core rod 70 is subjected to an upward resultant force direction, the core rod 70 moves upwards to compress the buffer cavity 60, the residual water in the buffer cavity 60 is further discharged from the buffer small hole 50 until the sealing part 71 is sealed in the sleeve 80, the first water passage 20 is disconnected from the valve core water inlet 72, and at this time, the first water passage 20 stops water outlet.

The second water passing channel 30 and the buffer cavity 60 can slow down the opening or closing time of the first water passing channel 20, and play a role of preventing water hammer.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.

Claims

1. Waterproof hammer solenoid valve, its characterized in that: the valve core is arranged at the joint of the first water passing channel, the second water passing channel and the water outlet channel, and the valve core is provided with a small buffer hole capable of communicating the second water passing channel and the water outlet channel;

2. The water hammer resistant solenoid valve according to claim 1, wherein: the moving direction of the valve core is the same as the extending direction of the second water passing channel, the resultant force direction of the valve core is the direction far away from the second water passing channel when the first water passing channel is communicated with the water inlet channel, and the resultant force direction of the valve core is the direction close to the second water passing channel when the first water passing channel is disconnected with the water inlet channel.

3. The water hammer resistant solenoid valve of claim 2, wherein: the outlet of the first water passing channel is positioned on the side face of the valve core, and the water outlet channel and the second water passing channel are coaxially arranged.

4. The water hammer resistant solenoid valve according to claim 1, wherein: and a buffer cavity is arranged between the valve core and the second water passing channel, and the small buffer hole is communicated with the second water passing channel and the buffer cavity.

5. The water hammer resistant solenoid valve of claim 4, wherein: the valve core comprises a core rod and a sleeve, the sleeve is fixed on one side of an outlet of the first water passing channel, the core rod extends into the sleeve and can move in a reciprocating mode relative to the sleeve, the buffer small hole is formed in the core rod, the core rod is provided with a sealing portion, the first water passing channel is closed when the sealing portion abuts against the interior of the sleeve, and the first water passing channel is opened when the sealing portion leaves the sleeve.

6. The water hammer resistant solenoid valve of claim 5, wherein: the core bar is also provided with a valve core water inlet and a valve core water outlet which is always communicated with the water outlet channel and the small buffer hole, the valve core water inlet is arranged on the side surface of the core bar and is positioned above the sealing part, the valve core water outlet is arranged at the bottom end of the core bar, the sleeve is positioned above the first water passing channel, and the valve core water inlet is communicated with the valve core water outlet through the interior of the core bar.

7. The water hammer resistant solenoid valve of claim 6, wherein: the core rod comprises 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 seal movable fit with the inner wall of the buffer cavity, the buffer small hole penetrates through the first boss and is communicated with the interior of the core rod body, the valve core water inlet and the valve core water outlet are respectively arranged on the side face and the bottom end face of the core rod body, and the sealing part is fixedly connected to the periphery of the core rod body and is located below the first boss.

8. The water hammer resistant solenoid valve of claim 7, wherein: 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 axially limit the valve core.

9. The water hammer resistant solenoid valve of claim 7, wherein: the valve core further comprises a sealing cylinder fixed on the other side of the first water passing channel, a second boss is further arranged on the periphery of the core rod body, and the sealing cylinder is sleeved outside the core rod body and is in sealing sliding fit with the second boss.

10. The water hammer resistant solenoid valve of claim 5, wherein: still include the elastic component that resets, this elastic component one end that resets links to each other with the core bar bottom.

11. The water hammer resistant solenoid valve according to any one of claims 1 to 10, wherein: the driving part comprises a valve head of a solenoid valve or a manual switch.