CN117927706A - Backflow-preventing stop valve system with backflow-preventing device - Google Patents
Backflow-preventing stop valve system with backflow-preventing device Download PDFInfo
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- CN117927706A CN117927706A CN202410282856.6A CN202410282856A CN117927706A CN 117927706 A CN117927706 A CN 117927706A CN 202410282856 A CN202410282856 A CN 202410282856A CN 117927706 A CN117927706 A CN 117927706A
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- valve
- control channel
- backflow prevention
- downstream
- clack
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- 230000002265 prevention Effects 0.000 claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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Abstract
A backflow-preventing stop valve system with a backflow-preventing device is characterized in that a valve clack downstream control channel is arranged in a stop valve clack of the backflow-preventing stop valve, a valve rod downstream control channel is connected with a valve cover inner downstream control channel, a valve body is externally connected with a control channel formed by an upstream section and a downstream section, and a backflow-preventing control reversing valve is assembled in the control channel. According to the invention, the valve cover, the valve rod and the valve clack of the backflow prevention stop valve are respectively provided with corresponding control channels, and then the reversing valve with the pressure emptying channel is combined, when the pressure water in the control channel at the upstream section is positioned at the upper opening position of the backflow prevention control reversing valve, the valve core of the reversing valve pushes the lower sealing opening to block the control channel at the downstream section from conveying the pressure water to the control channel at the downstream section of the valve cover, so that the system is normally opened and closed; when the pressure water of the downstream section control channel flows to the position of the lower opening of the backflow prevention control reversing valve, the valve core of the reversing valve pushes up the sealing opening to block the communication between the downstream section control channel and the emptying channel, so that the backflow prevention stop valve system has the backflow prevention function.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a backflow-preventing stop valve system with a backflow-preventing device.
Background
The stop valve is not only suitable for medium and low pressure, but also suitable for high pressure, and can make the valve clack sealing surface closely fit with the valve seat sealing surface by means of valve lever pressure, so that medium circulation is prevented.
The stop valve is an important component in a water supply system, is widely applied to various industries such as city tap water, fire protection systems, power plants, petrochemical industry and the like, and particularly relates to a pipe network valve structure commonly used in city water supply pipes, which is used for cut-off control of fluid in the pipe network, so that the water flow can be controlled to be opened and closed quickly and conveniently, and the normal operation of the water supply system is ensured.
However, the stop valve applied to the urban water supply network at present is not suitable for the backflow prevention function because the control channel inside the valve is not reasonably designed, and the backflow prevention stop valve system with the backflow prevention device is provided in combination with the actual application requirements.
Disclosure of Invention
The invention provides a backflow-preventing stop valve system with a backflow-preventing device, which utilizes a corresponding control channel in the stop valve to be combined with a reversing valve with a pressure emptying channel to realize the normal opening and closing and backflow-preventing functions of the system.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides a take anti-backflow stop valve system of anti-backflow device, it adopts the stop valve to assemble between water supply upstream port and water supply downstream port, wherein, water supply upstream port is linked together with the feed liquor arc cavity of valve body, water supply downstream port is linked together with the play liquid arc cavity of valve body, the valve rod is equipped with the valve clack that is used for opening and close the valve body, the valve clack sets up in going out liquid arc cavity to carry out the shutoff to the intercommunicating pore between feed liquor arc cavity and the play liquid arc cavity, detailed technical scheme is:
the valve clack is internally provided with a valve clack downstream control channel, the valve rod comprises a valve rod upstream control channel and a valve rod downstream control channel which are vertically arranged, the valve rod downstream control channel is connected with the downstream control channel which is transversely arranged in the valve cover, and the valve cover downstream control channel and the valve rod downstream control channel are communicated with a plurality of overflow holes of the valve rod sealing support sleeve;
the valve body is externally connected with a control channel formed by an upstream section and a downstream section, and a backflow prevention control reversing valve is assembled in the control channel and is provided with a channel for exhausting pressure;
Further, when the pressurized water in the upstream section control channel is at the upper opening position of the reverse flow prevention control reversing valve, the valve core of the reversing valve is pushed to be sealed, the downstream section control channel is blocked from conveying the pressurized water to the downstream valve cover control channel, the downstream valve cover control channel is communicated with the emptying channel, the downstream valve cover control channel, the downstream valve rod control channel and the downstream valve clack control channel are not pressurized, the upstream valve rod control channel is provided with pressurized water, the pressurized water is enabled to flow to the valve rod pin, the front section of the valve rod pin is embedded into the shaft hole of the valve clack pin, the valve rod locks the valve clack, the valve clack is driven to move up and down, and the reverse flow prevention stop valve system is enabled to form a normal opening and closing state;
Further, when the pressurized water of the downstream section control channel flows to the lower opening of the reverse flow prevention control reversing valve, the valve core of the reversing valve is pushed to be sealed, the communication between the downstream section control channel and the emptying channel is blocked, the downstream control channel of the valve cover is used for conveying the pressurized water, the high-pressure water sequentially flows to the downstream control channel of the valve rod and the downstream control channel of the valve clack, reaches the tail end face of the valve clack pin, the upstream control channel of the valve rod is pressureless, the high-pressure water pushes the valve clack pin, the valve clack pin is withdrawn from the valve clack pin operation shaft hole of the valve clack, the locking of the valve clack and the valve rod is avoided, the valve clack falls, and the sealing opening of the stop valve is closed freely, so that the reverse flow prevention stop valve system forms a reverse flow prevention state.
The valve rod is also provided with an upper sealing sleeve and a lower sealing sleeve, and the upper sealing sleeve and the lower sealing sleeve of the valve rod and the valve rod sealing support sleeve form a closed space.
For the function of the system, the backflow prevention stop valve system forms a normal opening and closing state and a backflow prevention state through the cooperation of the stop valve and the reversing valve.
According to the invention, the valve cover, the valve rod and the valve clack of the backflow prevention stop valve are respectively provided with corresponding control channels, and then the reversing valve with the pressure emptying channel is combined, when the pressure water in the control channel at the upstream section is positioned at the upper opening position of the backflow prevention control reversing valve, the valve core of the reversing valve pushes the lower sealing opening to block the control channel at the downstream section from conveying the pressure water to the control channel at the downstream section of the valve cover, so that the system is normally opened and closed; when the pressure water of the downstream section control channel flows to the position of the lower opening of the backflow prevention control reversing valve, the valve core of the reversing valve pushes up the sealing opening to block the communication between the downstream section control channel and the emptying channel, so that the backflow prevention stop valve system has the backflow prevention function.
Drawings
The invention is described in further detail below with reference to the accompanying drawings.
FIG. 1 is a schematic view of a back flow prevention stop valve system with a back flow prevention device according to the present invention, wherein the valve is normally closed;
FIG. 2 is a schematic view of a portion of the back flow prevention shut-off valve system of FIG. 1 in which the valve is normally closed;
FIG. 3 is a schematic view of a reverse flow preventing stop valve system with a reverse flow preventing device according to the present invention, wherein the valve is normally opened;
FIG. 4 is a schematic view of a portion of the back flow prevention shut-off valve system of FIG. 3 in a normally open valve state;
FIG. 5 is a schematic view showing a backflow prevention system in which a backflow prevention device is provided, and the backflow prevention stop valve system is in a state of being activated when a backflow occurs during opening;
FIG. 6 is a schematic view of a portion of the back flow prevention shut-off valve system of FIG. 5 in a shut-off valve in an activated state of the back flow prevention system;
FIG. 7 is a schematic view showing a state in which a valve flap of a backflow prevention system is closed when a backflow prevention device is opened, in accordance with the backflow prevention stop valve system with the backflow prevention device of the present invention;
fig. 8 is a schematic view of a portion of the back flow prevention shutoff valve system shown in fig. 7 in a closed state of a valve flap of the back flow prevention system.
In the figure:
1. A water supply upstream port;
2.A downstream port for water;
3. A stop valve with a backflow preventing device;
4. A valve cover;
5. a valve stem;
6. a valve flap;
7. A valve body;
8. a valve clack return spring;
9. A valve clack pin;
10. A valve rod pin;
11. a valve stem return spring;
12. a control channel downstream of the valve flap;
13. a valve stem upstream control passage;
14. an upstream control channel;
15. A lower sealing sleeve of the valve rod;
16. a valve rod sealing support sleeve;
17. sealing sleeve on valve rod;
18. A control passage downstream of the valve cover;
19. A valve stem downstream control passage;
20. A reverse flow preventing control reversing valve;
21. A reversing reset spring;
22. A reversing valve core;
23. A vent passage;
24. downstream control channels.
Detailed Description
The invention discloses a backflow prevention stop valve system with a backflow prevention device, which is basically assembled by assembling a stop valve 3 with the backflow prevention device between a water supply upstream port 1 and a water supply downstream port 2, and then assembling a backflow prevention control reversing valve 20 outside the stop valve, thereby forming the backflow prevention stop valve system.
As shown in fig. 1-2, in the embodiment of the backflow prevention stop valve system of the present invention, a valve cover 4 is arranged at the upper part of an assembled stop valve 3 with a backflow prevention device, the valve cover 4 is provided with a valve rod 5 capable of sliding up and down, and the valve rod 5 is sleeved with a valve clack 6 for opening and closing a valve body 7; because the water supply upstream port 1 is communicated with the liquid inlet arc chamber of the valve body 7, and the water supply downstream port 2 is communicated with the liquid outlet arc chamber of the valve body 7, when the valve clack 6 is arranged in the liquid outlet arc chamber, the communication hole between the liquid inlet arc chamber and the liquid outlet arc chamber can be plugged.
Correspondingly, the flap 6 and the valve rod 5 are each provided with a flap pin 9 and a valve rod pin 10, which are adjacent to each other, and are each connected to a flap return spring 8 and a valve rod return spring 11.
Further, the valve clack 6 is provided with a valve clack downstream control channel 12, the valve cover 4 is provided with a transverse valve cover downstream control channel 18, the valve rod 5 is provided with a vertical control channel, the vertical control channel comprises a valve rod upstream control channel 13 and a valve rod downstream control channel 19, and the valve rod downstream control channel 19 is connected with the valve cover downstream control channel 18.
Further, the valve body 7 of the stop valve 3 with the backflow preventing device is connected with the water supply upstream port 1 and the water supply downstream port 2, the valve body 7 is externally connected with a control channel, the control channel comprises an upstream control channel 14 and a downstream control channel 24, a backflow preventing control reversing valve 20 is assembled between the upstream channel and the downstream channel, a reversing valve core 22 of the assembled backflow preventing control reversing valve 20 is connected with a reversing return spring 21, and the reversing valve core 22 is further provided with a venting channel 23 for venting pressure.
In addition, a corresponding sealing structure is added to the upper part of the sliding chamber where the valve rod 5 is arranged, and the sealing structure comprises a valve rod sealing support sleeve 16, and a valve rod upper sealing sleeve 17 and a valve rod lower sealing sleeve 15 which are respectively arranged on the upper side and the lower side of the support sleeve, wherein the valve rod sealing support sleeve 16 is provided with a plurality of overflow holes, and the valve rod sealing support sleeve is respectively communicated with a valve cover downstream control channel 18 and a valve rod downstream control channel 19 through the holes.
As shown in fig. 1 to 4, in the backflow prevention shutoff valve system with backflow prevention device according to the present invention, when normal closed and open states are performed, since the pressure of the upstream water supply port 1 is high and the pressure of the downstream water supply port 2 is low, water enters the valve body 7 from the upstream city water supply port 1 and then enters the downstream water supply port 2, and at this time, the pressurized water in the upstream control channel 14 is at the upper opening position of the backflow prevention control diverter valve 20, and the diverter valve core 22 is pushed down to seal by the pressurized water, so that the downstream control channel 24 is blocked from delivering the pressurized water to the downstream valve cover control channel 18; because the downstream control channel 18 of the valve cover is communicated with the emptying channel 23, no pressure water exists in the downstream control channel 18 of the valve cover, the downstream control channel 19 of the valve rod and the downstream control channel 12 of the valve clack, and the upstream control channel 13 of the valve rod is provided with pressure water, so that the pressure water is pressed to the valve rod pin 10, the force of the valve rod return spring 11 and the valve clack return spring 8 is overcome, the valve clack pin 9 is pushed, the front section of the valve rod pin 10 is embedded into the shaft hole of the valve clack pin 9, the valve rod 5 locks the valve clack 6, drives the valve clack 6 to move up and down, and the normal closing and opening states of the valve are ensured, as shown in fig. 1, and the normal opening states of the valve are shown in fig. 3.
As shown in fig. 5 to 8, in the backflow prevention shutoff valve system with backflow prevention device according to the present invention, when a backflow state occurs, since the pressure of the downstream port 2 is high and the pressure of the upstream port 1 is low, water enters the valve body 7 from the urban downstream port 2 and then enters the upstream port 1, and at this time, the pressurized water in the downstream control channel 24 flows to the lower opening of the backflow prevention control diverter valve 20, and the high-pressure pressurized water pushes the diverter valve core 22 to the upper sealing opening, blocking the communication between the downstream control channel 24 and the vent channel 23, and then the pressurized water is supplied to the downstream control channel 18 of the valve cover; meanwhile, the valve rod 5 is kept to move up and down through a closed space formed by combining the valve rod upper sealing sleeve 17, the valve rod sealing support sleeve 16 with a plurality of flow holes and the valve rod lower sealing sleeve 15, and high-pressure water flows to the valve rod downstream control channel 19 and the valve clack downstream control channel 12 to reach the tail end face of the valve clack pin 9; the control channel 13 on the upstream of the valve rod is free of pressurized water, the high-pressure water pushes the valve clack pin 9, and then pushes the valve rod pin 10 to withdraw from the valve clack pin 9 running shaft hole of the valve clack 6, so that the valve clack 6 is prevented from locking with the valve rod 5, and the valve clack 6 falls under the action of dead weight and backflow water pressure, the sealing port of the stop valve is freely closed, the backflow preventing system is started when the valve is opened, as shown in fig. 5, and the valve is closed when the backflow preventing system is opened, as shown in fig. 7.
In the description of the present specification, the terms "present embodiment," "detailed description," and the like, if any, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention or invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples; furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiments described above are intended to facilitate understanding and application by those skilled in the art, and it will be apparent to those skilled in the art that various modifications may be made to these examples and that the general principles described herein may be applied to other embodiments without undue burden.
Claims (8)
1. The utility model provides a take anti-backflow stop valve system of anti-backflow device, its adopts the stop valve to assemble between water supply upstream port and water supply downstream port, wherein, water supply upstream port is linked together with the feed liquor arc cavity of valve body, water supply downstream port is linked together with the play liquid arc cavity of valve body, the valve rod is equipped with the valve clack that is used for opening and close the valve body, the valve clack sets up in play liquid arc cavity to carry out shutoff to the intercommunicating pore between feed liquor arc cavity and the play liquid arc cavity, its characterized in that:
A valve clack downstream control channel is arranged in the valve clack, the valve rod comprises a valve rod upstream control channel and a valve rod downstream control channel which are vertically arranged, the valve rod downstream control channel is connected with the downstream control channel which is transversely arranged in the valve cover, and the valve cover downstream control channel and the valve rod downstream control channel are both communicated with a plurality of overflow holes of the valve rod sealing support sleeve;
the valve body is externally connected with a control channel formed by an upstream section and a downstream section, and is provided with a backflow prevention control reversing valve, and the reversing valve is provided with a channel for discharging pressure;
When the pressurized water in the control channel of the upstream section is at the upper opening position of the reverse flow prevention control reversing valve, the valve core of the reversing valve pushes the lower sealing opening to block the control channel of the downstream section from conveying the pressurized water to the control channel of the downstream section of the valve cover, so that the reverse flow prevention stop valve system forms a normal opening and closing state;
When the pressure water of the downstream section control channel flows to the lower opening of the backflow prevention control reversing valve, the valve core of the reversing valve pushes up the sealing opening to block the communication between the downstream section control channel and the emptying channel, so that the backflow prevention stop valve system forms a backflow prevention state.
2. The backflow prevention shutoff valve system with backflow prevention device of claim 1, wherein: under the normal open-close state, the downstream control channel of the valve cover is communicated with the emptying channel, no pressure water exists in the downstream control channel of the valve cover, the downstream control channel of the valve rod and the downstream control channel of the valve clack, and the upstream control channel of the valve rod is provided with pressure water, so that the pressure water is pressed towards the valve rod pin.
3. The backflow prevention shutoff valve system with backflow prevention device of claim 1, wherein: under the state of backflow prevention, the valve cover downstream control channel transmits pressurized water, high-pressure water sequentially flows to the valve rod downstream control channel and the valve clack downstream control channel to reach the tail end face of the valve clack pin, the valve rod upstream control channel does not have pressurized water, the high-pressure water pushes the valve clack pin, the valve clack and the valve rod are prevented from being locked, the valve clack falls down, and the sealing port of the stop valve is closed freely.
4. The backflow prevention shutoff valve system with backflow prevention device of claim 2, wherein: the front section of the valve rod pin is embedded into the shaft hole of the valve clack pin, so that the valve rod locks the valve clack to drive the valve clack to move up and down.
5. The backflow prevention shutoff valve system with backflow prevention device of claim 3, wherein: the valve rod pin exits from the valve clack pin running shaft hole of the valve clack, so that the valve clack is prevented from being locked with the valve rod, and the valve clack falls down.
6. The backflow prevention shutoff valve system with backflow prevention device of any of claims 1-5, wherein: the valve rod is provided with an upper sealing sleeve and a lower sealing sleeve.
7. The backflow prevention shutoff valve system with backflow prevention device of claim 6, wherein: the upper and lower sealing sleeves of the valve rod and the valve rod sealing support sleeve form a closed space.
8. The backflow prevention shutoff valve system with backflow prevention device of any of claims 1-5, wherein: the backflow prevention stop valve system forms a normal opening and closing state and a backflow prevention state through the cooperation of the stop valve and the reversing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410282856.6A CN117927706A (en) | 2024-03-13 | 2024-03-13 | Backflow-preventing stop valve system with backflow-preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410282856.6A CN117927706A (en) | 2024-03-13 | 2024-03-13 | Backflow-preventing stop valve system with backflow-preventing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117927706A true CN117927706A (en) | 2024-04-26 |
Family
ID=90764901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410282856.6A Pending CN117927706A (en) | 2024-03-13 | 2024-03-13 | Backflow-preventing stop valve system with backflow-preventing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117927706A (en) |
-
2024
- 2024-03-13 CN CN202410282856.6A patent/CN117927706A/en active Pending
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