CN211315247U - Single-diaphragm low-resistance backflow preventer - Google Patents
Single-diaphragm low-resistance backflow preventer Download PDFInfo
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- CN211315247U CN211315247U CN201921347615.6U CN201921347615U CN211315247U CN 211315247 U CN211315247 U CN 211315247U CN 201921347615 U CN201921347615 U CN 201921347615U CN 211315247 U CN211315247 U CN 211315247U
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Abstract
The utility model discloses a single-diaphragm low-resistance backflow preventer, the bottom of the main valve body is provided with a water-drain channel and a water-drain device arranged on the water-drain channel, the water-drain device comprises a water-drain joint, a water-drain valve seat, a water-drain valve clack, a guide vane nut and a water-drain spring, the water-drain joint is arranged on the water-drain channel, the water-drain valve seat is arranged on the water-drain channel above the water-drain joint, the water-drain valve clack is fixed at the bottom of the main valve rod and is in linkage fit with the main valve rod, the water-drain valve clack is also in sealing fit with the water-drain valve seat, the guide vane nut is in threaded connection with the bottom of the main valve rod, the water-drain spring is movably arranged between the guide vane nut and the water-drain joint, two ends of the water-drain spring respectively abut against the guide vane nut and the water-drain joint, two-stage non-, the opening and closing are safe and reliable, and the abnormal drainage phenomenon is avoided.
Description
Technical Field
The utility model relates to a backflow preventer specifically is a low resistance backflow preventer of single diaphragm.
Background
The backflow preventer is one device comprising non-return parts and capable of preventing water from flowing backwards in water supply pipeline. The backflow preventer has the function of preventing the medium in the pipeline from flowing backwards under any working condition so as to achieve the purpose of avoiding backflow pollution. However, the single-diaphragm low-resistance backflow preventer in the prior art is greatly interfered by pressure fluctuation of the pipeline, and abnormal drainage can occur.
Disclosure of Invention
The utility model aims at: in order to overcome the defects of the prior art, the utility model provides a single-diaphragm low-resistance backflow preventer for improving abnormal drainage phenomenon.
The technical scheme of the utility model: the valve comprises a main valve body, an auxiliary valve body, a main valve rod, a front check valve seat, a front check valve disc, a front spring seat, a front spring, a rear check valve rod, a rear check valve seat, a rear check valve disc, a rear spring seat, a rear spring, a diaphragm and a valve cover, wherein the main valve body and the auxiliary valve body are arranged on opposite sides, the valve cover is fixed on the main valve body, the diaphragm is arranged between the main valve body and the valve cover, the top end of the main valve rod is fixedly penetrated through the diaphragm, and the main valve rod penetrates through; the front check valve rod penetrates into the front spring seat, the front spring, the front check valve seat and the front check valve disc in sequence, the front check valve rod is fixedly connected with the front spring seat and the front check valve disc respectively, the front check valve rod is movably connected with the front spring and the front check valve seat respectively, the front check valve seat is further fixed in the main valve body, and the front check valve seat is in sealing fit with the front check valve disc; the rear check valve rod sequentially penetrates into the rear check valve seat, the rear check valve disc, the rear spring and the rear spring seat, the rear check valve rod is fixedly connected with the rear check valve disc, the rear check valve rod is movably connected with the rear spring, the rear spring seat and the rear check valve seat respectively, the rear check valve seat is further fixed in the main valve body, and the rear check valve seat is in sealing fit with the rear check valve disc; the bottom of the main valve body is provided with a drain passage and a drain device arranged on the drain passage, the drain device comprises a drain joint, a drain valve seat, a drain valve clack, a guide vane nut and a drain spring, the drain joint is arranged on the drain passage, the drain valve seat is arranged on the drain passage above the drain joint, the drain valve clack is fixed at the bottom end of the main valve rod and is in linkage fit with the main valve rod, the drain valve clack is in sealing fit with the drain valve seat, the guide vane nut is in threaded connection with the bottom end of the main valve rod, the drain spring is movably arranged between the guide vane nut and the drain joint, and two ends of the drain spring are respectively abutted to the guide vane nut and the drain joint.
By adopting the technical scheme, the two-stage non-return device is arranged to limit pressure water backflow or siphon backflow, the precision and the water discharge pressure of the water discharge device at the bottom can be adjusted through the guide vane nut, the water discharge spring can buffer the interference of pipeline pressure fluctuation, the opening and closing are safe and reliable, and the abnormal water discharge phenomenon is avoided.
The utility model discloses a further setting: the drain joint is installed on the drain channel in a threaded mode, a step is arranged in the drain joint, and the drain spring abuts against the step.
By adopting the further arrangement, the structure design is compact and reasonable.
The utility model discloses a further setting again: the rear spring seat and the auxiliary valve body are integrally arranged.
Adopt above-mentioned further setting again, be convenient for the fixed of back spring holder and make.
The utility model discloses a still further set up: the front spring seat is installed on the front check valve rod in a threaded mode.
By adopting the further arrangement, the compression amount of the front spring can be adjusted by rotating the front spring seat, so that the pressure bearing capacity of the front check valve disc is adjusted.
The utility model discloses a still further set up: an upper pressing circular plate is arranged above the membrane, a lower pressing circular plate is arranged below the membrane, the upper pressing circular plate and the lower pressing circular plate are pressed to clamp the membrane, and the diameter of the upper pressing circular plate is smaller than that of the lower pressing circular plate.
By adopting the above further arrangement, the diaphragm can be raised or recessed due to the up-down movement of the main valve rod in the operation process, the sizes of the upper pressure circular plate and the lower pressure circular plate are different, so that the stress positions of the diaphragms can be prevented from being consistent, and the service life of the diaphragms can be prolonged.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of the present invention;
FIG. 2 is an enlarged view of the point A in FIG. 1 according to the present invention;
the valve comprises a main valve body 1, an auxiliary valve body 2, a main valve rod 3, a front check valve rod 41, a front check valve seat 42, a front check valve disc 43, a front spring seat 44, a front spring 45, a rear check valve rod 51, a rear check valve seat 52, a rear check valve disc 53, a rear spring seat 54, a rear spring 55, a diaphragm 6, a valve cover 7, a water draining device 8, a water draining joint 81, a water draining valve seat 82, a water draining valve clack 83, a guide vane nut 84, a water draining spring 85, an upper pressure circular plate 61 and a lower pressure circular plate 62.
Detailed Description
As shown in fig. 1 and fig. 2, the single-diaphragm low-resistance backflow preventer comprises a main valve body 1, an auxiliary valve body 2, a main valve rod 3, a front check valve rod 41, a front check valve seat 42, a front check valve disk 43, a front spring seat 44, a front spring 45, a rear check valve rod 51, a rear check valve seat 52, a rear check valve disk 53, a rear spring seat 54, a rear spring 55, a diaphragm 6 and a bonnet 7, wherein the main valve body 1 is arranged opposite to the auxiliary valve body 2, the bonnet 7 is fixed on the main valve body 1, the diaphragm 6 is arranged between the main valve body 1 and the bonnet 7, the top end of the main valve rod 3 is fixedly penetrated by the diaphragm 6, and the main valve rod 3 penetrates through the main; the front check valve rod 41 sequentially penetrates into the front spring seat 44, the front spring 45, the front check valve seat 42 and the front check valve disc 43, the front check valve rod 41 is fixedly connected with the front spring seat 44 and the front check valve disc 43 respectively, the front check valve rod 41 is movably connected with the front spring 45 and the front check valve seat 42 respectively, the front check valve seat 42 is further fixed in the main valve body 1, and the front check valve seat 42 is in sealing fit with the front check valve disc 43; the rear check valve rod 51 penetrates into the rear check valve seat 52, the rear check valve disc 53, the rear spring 55 and the rear spring seat 54 in sequence, the rear check valve rod 51 is fixedly connected with the rear check valve disc 53, the rear check valve rod 51 is movably connected with the rear spring 55, the rear spring seat 54 and the rear check valve seat 52 respectively, the rear check valve seat 52 is further fixed in the main valve body 1, and the rear check valve seat 52 is in sealing fit with the rear check valve disc 53. In operation, front check-valve disc 43 is forced away from front check-valve seat 42, front spring 45 is forced to compress to open the passage, and back check-valve disc 53 operates in substantially the same manner. The bottom of the main valve body 1 is equipped with the sluicing passageway and sets up sluicing device 8 on the sluicing passageway, sluicing device 8 connects 81 including the sluicing, sluicing valve seat 82, sluicing valve clack 83, stator nut 84 and sluicing spring 85, sluicing connects 81 to install on the sluicing passageway, sluicing valve seat 82 sets up on the sluicing passageway of sluicing joint 81 top, sluicing valve clack 83 is fixed in main valve stem 3 bottom and cooperates with main valve stem 3 linkage, sluicing valve clack 83 still cooperates with sluicing valve seat 82 is sealed, stator nut 84 threaded connection is in main valve stem 3 bottommost, sluicing spring 85 activity sets up between stator nut 84 and sluicing joint 81, sluicing spring 85 both ends are supported respectively on stator nut 84 and sluicing joint 81. The guide vane nut 84 can be adjusted through adjusting, so that the precision and the water release pressure of the water release device 8 are adjusted, and the water release spring 85 can also buffer the interference of pipeline pressure fluctuation, so that the water release of the water release device 8 is more normal.
The drain joint 81 is screwed on the drain passage, a step is provided in the drain joint 81, and one end of the drain spring 84 abuts on the step.
The rear spring seat 54 is integrally formed with the sub-valve body 2, and the structure is more stable.
The front spring seat 44 is threadedly mounted on the front check valve rod 41, and the compression of the front spring can be adjusted by rotating the front spring seat 44, so that the pressure-bearing capacity of the front check valve disc is adjusted.
An upper pressure circular plate 61 is arranged above the membrane 6, a lower pressure circular plate 62 is arranged below the membrane 6, the upper pressure circular plate 61 and the lower pressure circular plate 62 are pressed and clamped with the membrane 6, and the diameter of the upper pressure circular plate 61 is smaller than that of the lower pressure circular plate 62. In the operation process, the diaphragm 6 is raised or recessed due to the up-and-down movement of the main valve rod 3, and the sizes of the upper pressure circular plate 61 and the lower pressure circular plate 62 are different, so that the stress positions of the diaphragm 6 can be prevented from being consistent, and the service life of the diaphragm 6 is prolonged.
Claims (5)
1. The utility model provides a low resistance backflow preventer of single diaphragm which characterized in that: the valve comprises a main valve body, an auxiliary valve body, a main valve rod, a front check valve seat, a front check valve disc, a front spring seat, a front spring, a rear check valve rod, a rear check valve seat, a rear check valve disc, a rear spring seat, a rear spring, a diaphragm and a valve cover, wherein the main valve body and the auxiliary valve body are arranged on opposite sides, the valve cover is fixed on the main valve body, the diaphragm is arranged between the main valve body and the valve cover, the top end of the main valve rod is fixedly penetrated through the diaphragm, and the main valve rod penetrates through; the front check valve rod penetrates into the front spring seat, the front spring, the front check valve seat and the front check valve disc in sequence, the front check valve rod is fixedly connected with the front spring seat and the front check valve disc respectively, the front check valve rod is movably connected with the front spring and the front check valve seat respectively, the front check valve seat is further fixed in the main valve body, and the front check valve seat is in sealing fit with the front check valve disc; the rear check valve rod sequentially penetrates into the rear check valve seat, the rear check valve disc, the rear spring and the rear spring seat, the rear check valve rod is fixedly connected with the rear check valve disc, the rear check valve rod is movably connected with the rear spring, the rear spring seat and the rear check valve seat respectively, the rear check valve seat is further fixed in the main valve body, and the rear check valve seat is in sealing fit with the rear check valve disc; the bottom of the main valve body is provided with a drain passage and a drain device arranged on the drain passage, the drain device comprises a drain joint, a drain valve seat, a drain valve clack, a guide vane nut and a drain spring, the drain joint is arranged on the drain passage, the drain valve seat is arranged on the drain passage above the drain joint, the drain valve clack is fixed at the bottom end of the main valve rod and is in linkage fit with the main valve rod, the drain valve clack is in sealing fit with the drain valve seat, the guide vane nut is in threaded connection with the bottom end of the main valve rod, the drain spring is movably arranged between the guide vane nut and the drain joint, and two ends of the drain spring are respectively abutted to the guide vane nut and the drain joint.
2. A single-diaphragm low-resistance backflow preventer as claimed in claim 1, wherein: the drain joint is installed on the drain channel in a threaded mode, a step is arranged in the drain joint, and the drain spring abuts against the step.
3. A single diaphragm low resistance backflow preventer according to claim 1 or 2, wherein: the rear spring seat and the auxiliary valve body are integrally arranged.
4. A single diaphragm low resistance backflow preventer according to claim 1 or 2, wherein: and the front spring seat is arranged on the front check valve rod in a threaded manner.
5. A single diaphragm low resistance backflow preventer according to claim 1 or 2, wherein: an upper pressing circular plate is installed above the membrane, a lower pressing circular plate is installed below the membrane, the upper pressing circular plate and the lower pressing circular plate are pressed to clamp the membrane, and the diameter of the upper pressing circular plate is smaller than that of the lower pressing circular plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921347615.6U CN211315247U (en) | 2019-08-19 | 2019-08-19 | Single-diaphragm low-resistance backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921347615.6U CN211315247U (en) | 2019-08-19 | 2019-08-19 | Single-diaphragm low-resistance backflow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211315247U true CN211315247U (en) | 2020-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921347615.6U Active CN211315247U (en) | 2019-08-19 | 2019-08-19 | Single-diaphragm low-resistance backflow preventer |
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| CN (1) | CN211315247U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063008A (en) * | 2021-03-30 | 2021-07-02 | 铜陵兴荣阀门管件有限公司 | Single-diaphragm low-resistance backflow preventer |
-
2019
- 2019-08-19 CN CN201921347615.6U patent/CN211315247U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063008A (en) * | 2021-03-30 | 2021-07-02 | 铜陵兴荣阀门管件有限公司 | Single-diaphragm low-resistance backflow preventer |
| CN113063008B (en) * | 2021-03-30 | 2024-01-26 | 铜陵兴荣阀门管件有限公司 | Single-diaphragm low-resistance backflow preventer |
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