CN213479279U - Novel backflow preventer - Google Patents
Novel backflow preventer Download PDFInfo
- Publication number
- CN213479279U CN213479279U CN202022360078.8U CN202022360078U CN213479279U CN 213479279 U CN213479279 U CN 213479279U CN 202022360078 U CN202022360078 U CN 202022360078U CN 213479279 U CN213479279 U CN 213479279U
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- Prior art keywords
- valve
- check valve
- check
- water
- water release
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- 241000446313 Lamella Species 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 75
- 238000007789 sealing Methods 0.000 claims description 22
- 238000000926 separation method Methods 0.000 claims description 15
- 210000004907 gland Anatomy 0.000 claims description 10
- 230000001815 facial effect Effects 0.000 abstract description 2
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 238000012423 maintenance Methods 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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- Check Valves (AREA)
Abstract
The utility model discloses a novel backflow preventer, including setting up at inside preceding check valve and the back check valve in cylindric valve body both ends, valve body lower surface intercommunication between preceding check valve and the back check valve has the outlet valve, lateral wall communicates respectively on the valve body of preceding check valve front end and back check valve rear end has a ball valve, the valve body upside lateral wall opening of outlet valve top has the upper cover through bolted cover, it has a ball valve to cover same intercommunication, preceding check valve and back check valve include annular check disk seat respectively, the non return valve shaft, conical non return lamella and check valve spring, every non return disk seat is fixed in the valve body through seal receptacle O type circle card, the check disk seat is provided with the valve shaft that extends to non return disk seat inner center, the concave surface center of non return lamella and the one end fixed connection of non return, the non return valve shaft runs through the valve shaft fixed arm. The utility model relates to a for the facial make-up formula, need not demolish the valve on the pipe network, alright change disk seat and two check valve clacks in order to maintain.
Description
Technical Field
The utility model relates to a valve, a novel backflow preventer specifically says so.
Background
The backflow preventer is a hydraulic control combination device which strictly limits the water in the pipeline to flow in one direction under the condition that the backflow pollution of tap water supply equipment, particularly domestic drinking water pipelines is serious and no device for effectively preventing backflow pollution is available. At present, the backflow preventer mainly comprises a low-resistance backflow preventer and a pressure-reducing backflow preventer, the head loss of the low-resistance backflow preventer according to the national standard is less than 3 meters, and the head loss of the pressure-reducing backflow preventer is less than 7 meters. However, the existing backflow preventer has no on-line maintenance function and can only prevent the medium from flowing backwards.
Disclosure of Invention
In order to solve the above problems, the present invention provides a novel backflow preventer.
In order to achieve the above purpose, the technical scheme of the utility model is that: a novel backflow preventer comprises a front check valve and a rear check valve which are arranged inside two ends of a cylindrical valve body, wherein the lower surface of the valve body between the front check valve and the rear check valve is communicated with a drain valve, the upper side walls of the valve body at the front end of the front check valve and the rear end of the rear check valve are respectively communicated with a ball valve, an upper cover covers an opening on the upper side wall of the valve body above the drain valve through a bolt, the upper cover is also communicated with a ball valve, the front check valve and the rear check valve respectively comprise an annular check valve seat, a check valve shaft, a conical check flap and a check valve spring, each check valve seat is fixed in the valve body through a seal seat O-shaped ring clamp, the check valve seat is provided with a valve shaft fixing arm extending towards the inner center of the check valve seat, the concave center of the check flap is fixedly connected with one, one end of the check valve spring is fixedly connected with the check valve shaft, the other end of the check valve spring is tightly attached to the valve shaft fixing arm, the edge of the check valve spring enables the edge of the check valve to be tightly pressed at the edge corresponding to the check valve seat, a circle of check valve sealing gasket tightly pressed at the edge corresponding to the check valve seat is fixed at the edge of the check valve, the check valves of the front check valve and the rear check valve are opened when moving towards the direction of the rear check valve, the bottom opening of the drain valve is covered with and fixes the drain valve water collecting seat, the drain valve water collecting seat is cylindrical, and the upper end.
Furthermore, the water drain valve comprises a cylindrical water drain valve adjusting bolt, a water drain valve piston plate and a water drain valve piston seat, the water drain valve adjusting bolt is screwed in a pipe orifice on the lower side surface of the middle part of the valve body, the lower end of a water drain valve guide shaft is slidably inserted in the center of the lower end of the water drain valve adjusting bolt, the upper end and the lower end of the water drain valve adjusting bolt are communicated, a water drain valve sealing gasket gland is fixed at the upper end of the water drain valve guide shaft, a water drain valve sealing plate covering an opening at the upper end of the water drain valve adjusting bolt is fixed at the lower surface edge of the water drain valve sealing gasket gland, the water drain valve piston seat is fixed on the lower side surface of the valve body, the water drain valve piston seat is cylindrical and sealed at the upper end, the water drain valve piston plate is positioned at the lower end in the water drain valve piston seat, an upper separation cavity is formed in, the upper surface of the sealing gasket pressing cover of the water escape valve and the piston plate of the water escape valve form a lower separation cavity through the lower surface, the lower separation cavity is communicated with the middle cavity in the middle of the valve body through the connecting cavities on the front side and the rear side of the valve body, the upper separation cavity is communicated with the water inlet cavity through the connecting channel on the side wall of the bottom of the valve body, and the other end of the valve body is a water outlet cavity.
Furthermore, a lower spring of the drain valve piston is sleeved on a drain valve guide shaft between the drain valve sealing gasket gland and the lower end of the drain valve adjusting bolt.
Furthermore, a plurality of through holes which enable the connecting channel to be communicated with the outside are formed in the connecting channel of the valve body, and an outer square plug is screwed and plugged in each through hole.
The utility model relates to a for the facial make-up formula, need not demolish the valve on the pipe network, alright change disk seat and two check valve clacks in order to maintain.
Drawings
The present invention will now be further described with reference to the accompanying drawings.
Fig. 1 is a schematic view of the structure of the present invention;
fig. 2 is a schematic side view of the present invention.
Detailed Description
As shown in figure 1 and figure 2, a novel backflow preventer comprises a front check valve and a rear check valve which are arranged inside two ends of a cylindrical valve body 1, wherein a drain valve is communicated with the lower surface of the valve body 1 between the front check valve and the rear check valve, the side walls of the valve body 1 at the front end of the front check valve and the rear end of the rear check valve are respectively communicated with a ball valve 2, the side wall opening at the upper side of the valve body 1 above the drain valve is covered with an upper cover 3 through a bolt, the upper cover 3 is also communicated with a ball valve 2, the front check valve and the rear check valve respectively comprise an annular check valve seat 4, a check valve shaft 5, a conical check flap 6 and a check valve spring 7, each check valve seat 4 is fixed in the valve body 1 through a seal seat O-shaped ring clamp, the check valve seat 4 is provided with a valve shaft fixing arm 8 extending towards the inner center of the, the check valve shaft 5 runs through the valve shaft fixing arm 8, and the other end cover of check valve shaft 5 has check valve spring 7, the one end and the 5 fixed connection of check valve shaft of check valve spring 7, the other end is hugged closely with the valve shaft fixing arm 8, check valve spring 7 makes the border of check lamella 6 sticis at the border that corresponds check valve seat 4, and the border of check lamella 6 is fixed with the one-tenth and sticiss at the sealed pad 9 of check valve seat 4 border that corresponds, the check lamella 6 of preceding check valve and back check valve is opened when moving to back check valve direction, the bottom opening of outlet valve is covered with and fixes outlet valve water collecting seat 10, outlet valve water collecting seat 10 is the tube-shape, and the upper end is the sphere of intercommunication.
The water release valve comprises a cylindrical water release valve adjusting bolt 11, a water release valve piston plate 12 and a water release valve piston seat 13, wherein the water release valve adjusting bolt 11 is screwed in a pipe orifice on the lower side surface of the middle part of the valve body 1, the lower end of a water release valve guide shaft 14 is slidably inserted in the center of the lower end of the water release valve adjusting bolt 11, the upper end and the lower end of the water release valve adjusting bolt 11 are communicated, a water release valve sealing gasket cover 15 is fixed on the upper end of the water release valve guide shaft 14, a water release valve sealing plate 16 covering the opening on the upper end of the water release valve adjusting bolt 11 is fixed on the lower surface edge of the water release valve sealing gasket cover 15, the water release valve piston seat 13 is fixed on the lower side surface of the valve body 1, the water release valve piston seat 13 is cylindrical and the upper end is closed, the water release valve piston plate 12 is positioned at the lower end in the water release valve piston seat 13, an upper separation cavity 17 is formed in the water release valve piston, the upper surface of a sealing gland 15 of the drain valve and a piston plate 12 of the drain valve form a lower separation cavity 18 through the lower surface, the lower separation cavity 18 is communicated with a middle cavity at the middle part of the valve body 1 through connecting cavities 19 at the front side and the rear side of the valve body 1, an upper separation cavity 17 is communicated with a water inlet cavity 21 through a connecting channel 20 at the side wall of the bottom of the valve body 1, the other end of the valve body 1 is a water outlet cavity 22, a lower spring 23 of the drain valve piston is sleeved on a guide shaft 14 of the drain valve between the sealing gland 15 of the drain valve and the lower end of an adjusting bolt 11 of the drain valve, a plurality of through holes enabling the connecting channel 20 to be communicated with the outside are arranged at the position of the connecting channel 20 of the.
The utility model discloses the theory of operation:
1. the lower separation cavity 18 is communicated with the middle cavity in the middle of the valve body 1 through the connecting cavities 19 on the front side and the rear side of the valve body 1, the upper separation cavity 17 is communicated with the water inlet cavity 21 through the connecting channel 20 on the side wall of the bottom of the valve body 1, when the pressure of the water inlet cavity 21 of the valve body is higher than the pressure of the middle cavity, namely the pressure of the upper separation cavity 17 is higher than that of the lower separation cavity 18, as shown by a black arrow in fig. 1, the piston plate 12 of the drain valve is pressed downwards, so that the sealing gland 15 and the sealing plate 16 of the drain valve are pressed downwards to cover the upper end of the adjusting bolt 11 of the drain.
2. When the pressure of the middle cavity of the valve body is higher than the pressure of the water inlet cavity 21, as shown by the white arrow in fig. 1, the piston plate 12 of the lower drain valve for water pressure moves upwards to lift the sealing gland 15 and the sealing plate 16 of the drain valve away from the upper end of the adjusting bolt 11 of the drain valve, so that the drain valve is in an open state and drains water.
3. When the pressure of the water inlet cavity 21 of the valve body and the intermediate pressure change alternately, the seal seat 13 of the drain valve is opened and closed alternately, and the drainage and the closure of the drain valve also change.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (4)
1. A novel backflow preventer is characterized in that: the check valve comprises a front check valve and a rear check valve which are arranged inside two ends of a cylindrical valve body (1), wherein the lower surface of the valve body (1) between the front check valve and the rear check valve is communicated with a drain valve, the side walls of the valve body (1) at the front end of the front check valve and the rear end of the rear check valve are respectively communicated with a ball valve (2), the side wall opening at the upper side of the valve body (1) above the drain valve is covered with an upper cover (3) through bolts, the upper cover (3) is also communicated with a ball valve (2), the front check valve and the rear check valve respectively comprise an annular check valve seat (4), a check valve shaft (5), a conical check valve flap (6) and a check valve spring (7), each check valve seat (4) is fixed in the valve body (1) through a sealing seat O-shaped ring, the check valve seat (4) is provided with a valve shaft fixing arm (8) extending to the inner center of the check valve, valve shaft fixed arm (8) is run through in non return valve shaft (5), and the other pot head of non return valve shaft (5) has check valve spring (7), the one end and non return valve shaft (5) fixed connection of check valve spring (7), the other end is hugged closely with valve shaft fixed arm (8), check valve spring (7) make the border of check lamella (6) sticiss at the border that corresponds check disk seat (4), and the border of check lamella (6) is fixed with the round and sticiss at the sealed pad (9) of check disk seat (4) border that corresponds, open when preceding check valve and back check valve's check lamella (6) move to back check valve direction, the bottom opening of sluice valve is covered with and fixes sluice valve water collecting seat (10), what sluice valve water collecting seat (10) was the tube-shape, and the upper end is the sphere of intercommunication.
2. A novel backflow preventer as claimed in claim 1, wherein: the water release valve comprises a cylindrical water release valve adjusting bolt (11), a water release valve piston plate (12) and a water release valve piston seat (13), wherein the water release valve adjusting bolt (11) is screwed in a pipe orifice on the lower side surface of the middle part of the valve body (1), the lower end of a water release valve guide shaft (14) is inserted in the center of the lower end of the water release valve adjusting bolt (11) in a sliding way, the upper end and the lower end of the water release valve adjusting bolt (11) are communicated, a water release valve sealing gasket cover (15) is fixed at the upper end of the water release valve guide shaft (14), a water release valve sealing plate (16) covering an opening at the upper end of the water release valve adjusting bolt (11) is fixed at the lower surface edge of the water release valve sealing gasket cover (15), the water release valve piston seat (13) is fixed at the lower side surface of the valve body (1), the water release valve piston seat (13) is cylindrical and the upper end is closed, the water release valve piston plate (12) is positioned at the lower end in, the water escape valve piston plate (12) is fixedly connected with the center of the upper surface of a water escape valve sealing gasket gland (15) through a cylindrical structure of the lower surface, a lower separation cavity (18) is formed between the upper surface of the water escape valve sealing gasket gland (15) and the water escape valve piston plate (12) through the lower surface, the lower separation cavity (18) is communicated with the middle cavity of the middle part of the valve body (1) through a connection cavity (19) on the front side and the rear side of the valve body (1), an upper separation cavity (17) is communicated with a water inlet cavity (21) through a connection channel (20) on the side wall of the bottom of the valve body (1), and the other end of the valve body (1) is.
3. A novel backflow preventer as claimed in claim 1, wherein: a lower spring (23) of a drain valve piston is sleeved on the drain valve guide shaft (14) between the drain valve sealing gasket gland (15) and the lower end of the drain valve adjusting bolt (11).
4. A novel backflow preventer as claimed in claim 1, wherein: a plurality of through holes which enable the connecting channel (20) to be communicated with the outside are arranged at the connecting channel (20) of the valve body (1), and an outer screwed plug (24) is screwed and blocked in each through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022360078.8U CN213479279U (en) | 2020-10-21 | 2020-10-21 | Novel backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022360078.8U CN213479279U (en) | 2020-10-21 | 2020-10-21 | Novel backflow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213479279U true CN213479279U (en) | 2021-06-18 |
Family
ID=76366999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022360078.8U Active CN213479279U (en) | 2020-10-21 | 2020-10-21 | Novel backflow preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213479279U (en) |
-
2020
- 2020-10-21 CN CN202022360078.8U patent/CN213479279U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A new backflow preventer Effective date of registration: 20220329 Granted publication date: 20210618 Pledgee: Shandong Zhucheng rural commercial bank Limited by Share Ltd. Pledgor: SHANDONG ZHUCHENG JIANHUA VALVE MANUFACTURING Co.,Ltd. Registration number: Y2022980003539 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230224 Granted publication date: 20210618 Pledgee: Shandong Zhucheng rural commercial bank Limited by Share Ltd. Pledgor: SHANDONG ZHUCHENG JIANHUA VALVE MANUFACTURING Co.,Ltd. Registration number: Y2022980003539 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A New Backflow Preventer Effective date of registration: 20230302 Granted publication date: 20210618 Pledgee: Shandong Zhucheng rural commercial bank Limited by Share Ltd. Pledgor: SHANDONG ZHUCHENG JIANHUA VALVE MANUFACTURING Co.,Ltd. Registration number: Y2023980033832 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20210618 Pledgee: Shandong Zhucheng rural commercial bank Limited by Share Ltd. Pledgor: SHANDONG ZHUCHENG JIANHUA VALVE MANUFACTURING Co.,Ltd. Registration number: Y2023980033832 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A New Type of Backflow Prevention Device Granted publication date: 20210618 Pledgee: Shandong Zhucheng rural commercial bank Limited by Share Ltd. Pledgor: SHANDONG ZHUCHENG JIANHUA VALVE MANUFACTURING Co.,Ltd. Registration number: Y2024980007506 |