CN218883023U - Electric butterfly valve with backflow preventing device - Google Patents
Electric butterfly valve with backflow preventing device Download PDFInfo
- Publication number
- CN218883023U CN218883023U CN202220840722.8U CN202220840722U CN218883023U CN 218883023 U CN218883023 U CN 218883023U CN 202220840722 U CN202220840722 U CN 202220840722U CN 218883023 U CN218883023 U CN 218883023U
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- valve
- backflow
- valve plate
- rod
- valve rod
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Abstract
The utility model discloses a flow reversal device is prevented in area electronic butterfly valve, including electric butterfly valve's valve body, the feed liquor chamber and the city water supply upper reaches end intercommunication of valve body, the play liquid chamber and the city water supply lower reaches end intercommunication of valve body, the valve body lower extreme is provided with down assembles the piece, assemble the feed liquor chamber, play liquid chamber intercommunication of piece and valve body down, it is provided with the external passageway of anti-backflow function to assemble piece outer wall department down, the external passageway of anti-backflow function guides the upper valve rod with the flowing backwards water. The utility model discloses a down assemble the piece and down prevent valve plate closing spring between the valve rod, realize opening the self-closing of back valve plate, insert the closure that realizes valve plate and last valve rod in the valve rod through reset spring, the valve plate upper pin in the valve plate, through the water under high pressure, prevent that the refluence push rod can realize opening of valve plate and last valve rod, through preventing that the refluence function external connection passageway will flow backwards the water under high pressure and lead to last valve rod, the utility model discloses an electric butterfly valve prevents the refluence.
Description
Technical Field
The utility model belongs to the technical field of electric butterfly valve, concretely relates to area anti-backflow device's electric butterfly valve.
Background
The butterfly valve is a valve structure often used in pipe network design, the opening and closing piece of the butterfly valve is a butterfly plate in a valve body, and the butterfly plate is driven to rotate through a valve rod, so that the liquid in the valve body is opened and closed or adjusted.
However, at present, an electric butterfly valve with a backflow prevention function does not exist.
Disclosure of Invention
The utility model discloses a solve the problem that prior art exists and provide, its purpose provides an electronic butterfly valve of anti-backflow device in area.
The technical scheme of the utility model is that: the utility model provides a take anti-backflow device's electronic butterfly valve, includes electric butterfly valve's valve body, the feed liquor chamber and the city of valve body supply water upstream end intercommunication, the play liquid chamber and the city of valve body supply water downstream end intercommunication, the valve body lower extreme is provided with down the assembly piece, the feed liquor chamber, the play liquid chamber intercommunication of assembly piece and valve body down, assembly piece outer wall department is provided with anti-backflow function external channel down, anti-backflow function external channel is with the upper valve rod of refluence water guide.
Furthermore, an upper flange is formed at the upper end of the lower assembling block, a lower flange is formed at the lower end of the valve body, and the upper flange and the lower flange are fixed through bolts and nuts.
Furthermore, an installation groove is formed in the top of the lower assembly block, a lower valve rod is arranged in the installation groove, and the lower valve rod and the upper valve rod are connected with the valve plate.
Furthermore, an assembly counter bore is formed at the lower end of the lower valve rod, a backflow preventing valve plate closing spring is arranged in the assembly counter bore, and the other end of the backflow preventing valve plate closing spring is connected with the lower assembly block.
Furthermore, the lower valve rod and the valve plate are fixed through a lower pin of the valve plate.
Furthermore, an elastic locking structure is arranged between the upper valve rod and the valve plate.
Furthermore, the elastic locking structure comprises an upper valve rod internal backflow prevention functional channel formed in the upper valve rod, a transverse sliding channel is further formed in the upper valve rod, and a backflow prevention push rod is arranged in the sliding channel.
Furthermore, the elastic locking structure comprises an upper valve plate pin arranged in the valve plate, a return spring is arranged at the tail of the upper valve plate pin, and the upper valve plate pin abuts against the backflow-preventing push rod and is inserted into the sliding channel.
Furthermore, a large-diameter section is formed in the middle of the backflow prevention push rod, a groove is formed in the outer wall of the large-diameter section, and a sealing ring is arranged in the groove.
Furthermore, a limiting ring is arranged on the outer wall of the upper valve rod, the backflow-preventing push rod can slide from the limiting ring, and the limiting ring can block the large-diameter section of the backflow-preventing push rod, so that the backflow-preventing push rod does not extend out of the limiting ring.
The utility model discloses a down assemble the piece and down prevent valve plate closing spring between the valve rod, realize opening the self-closing of back valve plate, insert the closure that realizes valve plate and last valve rod in the valve rod through reset spring, the valve plate upper pin in the valve plate, through the water under high pressure, prevent that the refluence push rod can realize opening of valve plate and last valve rod, through preventing that the refluence function external connection passageway will flow backwards the water under high pressure and lead to last valve rod, the utility model discloses an electric butterfly valve prevents the refluence.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an assembly view of the middle and lower assembly blocks of the present invention;
fig. 3 is an assembly view of the upper stem seal support sleeve of the present invention;
FIG. 4 is an assembly view of the anti-backflow push rod of the present invention;
wherein:
1. urban water supply upstream end 2 urban water supply downstream end
3. Upper cavity channel controlled by valve body 4 diaphragm
5. Diaphragm control upper cavity 6 sealing diaphragm
7. Diaphragm-controlled lower cavity channel 8 diaphragm-controlled lower cavity
9. Backflow-preventing external channel with internal channel 10 and backflow-preventing function
11. Pressure relief channel of reversing valve core 12
13. Pressure relief spring 14 valve body side anti-backflow functional channel
15. Upper valve rod upper sealing sleeve of upper valve rod internal backflow prevention functional channel 16
17. Upper valve stem lower sealing sleeve of upper valve stem sealing support sleeve 18
19. Backflow-preventing push rod 20 valve plate upper pin
21. Valve rod on return spring 22
23. Valve plate lower pin 24 lower valve rod
25. The backflow prevention valve plate closes the spring.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples:
as shown in 1~4, an electric butterfly valve with a backflow prevention device comprises a valve body 3 of an electric butterfly valve, a liquid inlet cavity of the valve body 3 is communicated with an upstream end 1 of urban water supply, a liquid outlet cavity of the valve body 3 is communicated with a downstream end 2 of urban water supply, a lower assembly block is arranged at the lower end of the valve body 3, the lower assembly block is communicated with the liquid inlet cavity and the liquid outlet cavity of the valve body 3, a backflow prevention function external passage 10 is arranged at the outer wall of the lower assembly block, and the backflow prevention function external passage 10 guides backflow water to an upper valve rod 22.
An upper flange is formed at the upper end of the lower assembling block, a lower flange is formed at the lower end of the valve body 3, and the upper flange and the lower flange are fixed through bolts and nuts.
The top of the lower assembling block forms a mounting groove, a lower valve rod 24 is arranged in the mounting groove, and the lower valve rod 24 and the upper valve rod 22 are connected with the valve plate.
The lower end of the lower valve rod 24 forms an assembly counter bore, a backflow prevention valve plate closing spring 25 is arranged in the assembly counter bore, and the other end of the backflow prevention valve plate closing spring 25 is connected with a lower assembly block.
The lower valve rod 24 and the valve plate are fixed through a valve plate lower pin 23.
And an elastic locking structure is arranged between the upper valve rod 22 and the valve plate.
The elastic locking structure comprises an upper valve rod internal backflow prevention functional channel 15 formed in an upper valve rod 22, a transverse sliding channel is further formed in the upper valve rod 22, and a backflow prevention push rod 19 is arranged in the sliding channel.
The elastic locking structure comprises a valve plate upper pin 20 arranged in the valve plate, a return spring 21 is arranged at the tail of the valve plate upper pin 20, and the valve plate upper pin 20 abuts against a backflow-preventing push rod 19 and is inserted into the sliding channel.
The middle part of the backflow prevention push rod 19 forms a large-diameter section, a groove is formed in the outer wall of the large-diameter section, and a sealing ring is arranged in the groove.
The outer wall of the upper valve rod 22 is provided with a limit ring, the backflow prevention push rod 19 can slide from the limit ring, and the limit ring can block the large-diameter section of the backflow prevention push rod 19, so that the backflow prevention push rod 19 does not extend out of the limit ring.
The valve plate is provided with a stepped hole, the stepped hole is internally provided with a mounting head, and the mounting head props against the tail part of the reset spring 21. The valve plate upper stud 20 telescopes in the stepped bore.
Preferably, the stop collar is secured to the upper stem 22 by external threads.
Two sealing rings are arranged between the valve plate and the upper valve rod 22.
After the valve plate upper pin 20 retracts into the valve plate, the valve plate is locked and opened with the upper valve rod 22, and the valve plate can be rotationally closed under the driving of the backflow-preventing valve plate closing spring 25 and the lower valve rod 24.
And a diaphragm control upper cavity channel 4 communicated with the liquid inlet cavity is formed in the lower assembly block, and the diaphragm control upper cavity channel 4 is communicated with a diaphragm control upper cavity 5.
And a diaphragm control lower cavity channel 7 communicated with the liquid outlet cavity is formed in the lower assembling block, and the diaphragm control lower cavity channel 7 is communicated with a diaphragm control lower cavity 8.
And a sealing diaphragm 6 is arranged in the lower assembly block, and the sealing diaphragm 6 divides a cavity in the lower assembly block into a diaphragm control upper cavity 5 positioned above and a diaphragm control lower cavity 8 positioned below.
Form in the lower assembly piece and prevent the internal channel 9 of function of flowing backwards, sealed diaphragm 6 can carry out the shutoff to the upper end that prevents the internal channel 9 of function of flowing backwards to control prevent flowing backwards internal channel 9, the opening and close of diaphragm control cavity of resorption passageway 7.
A reversing valve core 11 is arranged in the backflow prevention function inner channel 9, and the backflow prevention function inner channel 9 is communicated with a backflow prevention function outer connecting channel 10.
Quick connectors are arranged at two ends of the external connection channel 10 with the backflow prevention function.
A pressure relief channel 12 is arranged in the backflow prevention function inner channel 9, a pressure relief spring 13 is arranged between the pressure relief channel 12 and the reversing valve core 11, and the pressure relief spring 13 can support the reversing valve core 11, so that plugging is realized.
An upper valve rod 22 capable of rotating is arranged in the valve body 3, and a sealing communicating cavity is arranged between the upper valve rod 22 and the valve body 3.
The sealing communicating cavity comprises an upper valve rod sealing support sleeve 17 arranged between the upper valve rod 22 and the valve body 3, annular grooves are formed in the inner wall and the outer wall of the upper valve rod sealing support sleeve 17, and through holes for communicating the upper valve rod sealing support sleeve and the annular grooves are formed in the two annular grooves.
A valve body side backflow prevention functional channel 14 is formed in the valve body 3, and the valve body side backflow prevention functional channel 14 is communicated with the sealing communicating cavity.
The sealing communicating cavity is communicated with an external channel 10 with a backflow prevention function.
And a plug for plugging the lower end of the backflow-preventing functional channel 15 in the upper valve rod is arranged at the bottom of the upper valve rod 22.
An upper valve rod lower sealing sleeve 18 is arranged at the lower end of the upper valve rod sealing support sleeve 17, and an upper valve rod upper sealing sleeve 16 is arranged at the upper end of the upper valve rod sealing support sleeve 17.
The working process of the utility model is as follows:
anti-backflow electric butterfly valve system with anti-backflow device, in normal closing and opening states
The pressure of the upstream end 1 of the urban water supply is high, high-pressure water enters the backflow prevention electric butterfly valve with the backflow prevention device and the downstream end 2 of the urban water supply, and the pressure and the water pressure of the diaphragm control upper cavity channel 4 and the diaphragm control upper cavity 5 are high and higher than those of the diaphragm control lower cavity channel 7 and the diaphragm control lower cavity 8; the diaphragm control upper cavity 5 presses the sealing diaphragm 6 and simultaneously presses the sealing port in the backflow prevention function inner channel 9, so that low-pressure water in the diaphragm control lower cavity channel 7 flows to the diaphragm control lower cavity 8 and flows to the backflow prevention function inner channel 9, and at the moment, the backflow prevention function inner channel 9 has no pressure water.
An upper sealing port of the reversing valve core 11 blocks the internal backflow prevention function channel 9 and the external backflow prevention function channel 10 under the action of a pressure relief spring 13; the backflow prevention function external channel 10 is communicated with the pressure relief channel 12 through a lower sealing port of the reversing valve core 11, and channels such as the backflow prevention function external channel 10, the backflow prevention function channel 14 on the side surface of the valve body, the backflow prevention function channel 15 in the upper valve rod and the like are in a pressure-free water state.
The backflow prevention push rod 19 of the system has no action, the pin 20 on the valve plate extends into the running shaft hole of the backflow prevention push rod 19 of the upper valve rod under the action of the reset spring 21, the upper valve rod is locked to drive the valve plate to rotate, and normal closing and opening of the valve are guaranteed.
Simultaneously, the valve plate rotates and passes through valve plate lower pin 23, drives lower valve rod 24 and rotates: a backflow prevention valve plate closing torsion spring 25 is connected in a shaft hole in the lower valve rod 24 in a chain mode, the backflow prevention valve plate closing torsion spring 25 is connected, one end of the backflow prevention valve plate is fixedly connected with the lower valve rod, and the other end of the backflow prevention valve plate is fixedly connected with the lower valve cover. When the lower valve rod 24 rotates, the backflow prevention valve plate closing torsion spring 25 is tightly screwed, and screwing torque is generated.
Backflow prevention electric butterfly valve system with backflow prevention device, and in pollution backflow occurrence state
The water pressure of the urban water supply downstream end 2 is high, high-pressure water enters the backflow prevention electric butterfly valve with the backflow prevention device and the urban water supply upstream end 1, and the pressure water pressure of the diaphragm control lower cavity channel 7 and the diaphragm control lower cavity 8 is high and higher than that of the diaphragm control upper cavity channel 4 and the diaphragm control upper cavity 5; the diaphragm control lower cavity 8 jacks up the sealing diaphragm 6, the diaphragm control lower cavity 8 is communicated with the backflow prevention function inner channel 9, high-pressure water appears, an upper sealing port of the reversing valve core is pressed to be opened, a lower sealing port of the reversing valve core is pressed to be closed, high-pressure water in the backflow prevention function inner channel 9 flows to the backflow prevention function outer channel 10 and the backflow prevention function channel 14 on the side face of the valve body, meanwhile, the high-pressure water pushes the backflow prevention push rod 19 to push the valve plate upper pin 20 to exit from a running shaft hole of the upper valve rod through a closed space formed by combining an upper valve rod upper sealing sleeve with a plurality of small flow passing holes and an upper valve rod lower sealing sleeve, and the high-pressure water pressure pushes the backflow prevention push rod 15 to push the valve plate upper pin 20 to escape from the running shaft hole of the upper valve rod, so as to avoid locking of the valve plate and the upper valve rod.
At the moment, the backflow-preventing valve plate closing torsion spring 25 is driven by the lower valve rod 24 and the valve plate lower pin-3 under the condition that the screwing moment is reset, so that the valve plate rotates under the action of the screwing moment reset start and backflow water pressure of the backflow-preventing valve plate closing torsion spring 25, the sealing port is freely closed, and the backflow prevention function is achieved.
The utility model discloses a prevent valve plate closing spring that flows backwards between lower assembly piece and the lower valve rod realizes opening the self-closing of back valve plate, inserts the closure that realizes valve plate and last valve rod in the valve rod through reset spring, valve plate upper pin in the valve plate, through the water under high pressure, prevent opening of valve plate and last valve rod can be realized to the backflow push rod, through preventing that backflow function external connection passageway leads to upward valve rod with the high pressure water that flows backwards, the utility model discloses an electric butterfly valve prevents flowing backwards.
Claims (7)
1. The utility model provides a take anti-backflow device's electronic butterfly valve, includes electric butterfly valve's valve body (3), the feed liquor chamber and the city of valve body (3) supply water upstream end (1) intercommunication, the play liquid chamber and the city of valve body (3) supply water downstream end (2) intercommunication, its characterized in that: a lower assembly block is arranged at the lower end of the valve body (3), the lower assembly block is communicated with a liquid inlet cavity and a liquid outlet cavity of the valve body (3), a backflow-preventing external channel (10) is arranged on the outer wall of the lower assembly block, and the backflow-preventing external channel (10) guides backflow water to the upper valve rod (22);
the valve plate rotates and drives the lower valve rod (24) to rotate through the valve plate lower pin (23): a backflow-preventing valve plate closing spring (25) is connected in a built-in shaft hole of the lower valve rod (24) in a chained mode;
an elastic pressing locking structure is arranged between the upper valve rod (22) and the valve plate;
the elastic pressure locking structure comprises an upper valve rod internal backflow prevention functional channel (15) formed in an upper valve rod (22), a transverse sliding channel is also formed in the upper valve rod (22), and a backflow prevention push rod (19) is arranged in the sliding channel;
the elastic locking structure comprises a valve plate upper pin (20) arranged in the valve plate, a return spring (21) is arranged at the tail of the valve plate upper pin (20), and the valve plate upper pin (20) abuts against a backflow-preventing push rod (19) and is inserted into a sliding channel.
2. The electric butterfly valve with the backflow preventing device according to claim 1, characterized in that: an upper flange is formed at the upper end of the lower assembling block, a lower flange is formed at the lower end of the valve body (3), and the upper flange and the lower flange are fixed through bolts and nuts.
3. The electric butterfly valve with the backflow prevention device according to claim 2, wherein: the lower assembling block top forms a mounting groove, a lower valve rod (24) is arranged in the mounting groove, and the lower valve rod (24) and the upper valve rod (22) are connected with the valve plate.
4. The electric butterfly valve with the backflow preventing device according to claim 3, wherein: the lower end of the lower valve rod (24) forms an assembly counter bore, a backflow preventing valve plate closing spring (25) is arranged in the assembly counter bore, and the other end of the backflow preventing valve plate closing spring (25) is connected with the lower assembly block.
5. The electric butterfly valve with the backflow prevention device according to claim 4, wherein: the lower valve rod (24) and the valve plate are fixed through a valve plate lower pin (23).
6. The electric butterfly valve with the backflow preventing device according to claim 5, wherein: the middle part of the backflow prevention push rod (19) forms a large-diameter section, a groove is formed in the outer wall of the large-diameter section, and a sealing ring is arranged in the groove.
7. The electric butterfly valve with the backflow preventing device according to claim 6, wherein: go up valve rod (22) outer wall department and be provided with the spacing ring, prevent that backflow push rod (19) can slide from the spacing ring, the spacing ring can block the major diameter section of preventing backflow push rod (19) to make prevent backflow push rod (19) not lean out the spacing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220840722.8U CN218883023U (en) | 2022-04-13 | 2022-04-13 | Electric butterfly valve with backflow preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220840722.8U CN218883023U (en) | 2022-04-13 | 2022-04-13 | Electric butterfly valve with backflow preventing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218883023U true CN218883023U (en) | 2023-04-18 |
Family
ID=85978715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220840722.8U Active CN218883023U (en) | 2022-04-13 | 2022-04-13 | Electric butterfly valve with backflow preventing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218883023U (en) |
-
2022
- 2022-04-13 CN CN202220840722.8U patent/CN218883023U/en active Active
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