CN108591543B - A low resistance backflow preventer - Google Patents
A low resistance backflow preventer Download PDFInfo
- Publication number
- CN108591543B CN108591543B CN201810767283.0A CN201810767283A CN108591543B CN 108591543 B CN108591543 B CN 108591543B CN 201810767283 A CN201810767283 A CN 201810767283A CN 108591543 B CN108591543 B CN 108591543B
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- Prior art keywords
- check valve
- valve
- inlet
- outlet
- valve body
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
本发明涉及一种低阻力倒流防止器，包括由进水阀体和出水阀体构成的阀体及位于进水阀体的阀门进口的第一级止回阀、位于出水阀体阀门出口的第二级止回阀，所述第一级止回阀和第二级止回阀之间为中间腔室。该结构使倒流防止器水流在阀门内部只做一次翻转即可流出阀体，从而减小倒流防止器的总流阻，整个装置结构简单，拆装维修方便。
The present invention relates to a low resistance backflow preventer, comprising a valve body consisting of an inlet valve body and an outlet valve body, a first-stage check valve located at the valve inlet of the inlet valve body, and a second-stage check valve located at the valve outlet of the outlet valve body, wherein an intermediate chamber is provided between the first-stage check valve and the second-stage check valve. The structure enables the water flow of the backflow preventer to flow out of the valve body after only one turn inside the valve, thereby reducing the total flow resistance of the backflow preventer, and the entire device has a simple structure and is convenient for disassembly, assembly and maintenance.
Description
Technical Field
The invention relates to the field of valve devices, in particular to a low-resistance backflow preventer.
Background
The check valve is used as a control valve, the main function of the check valve is to prevent the backflow of fluid in a pipeline, various check valves are disclosed in the prior art, for example, a Chinese patent No. 205534421U discloses an improved check valve, a first-stage valve clack and a second-stage valve clack are respectively arranged between a water inlet end and a water outlet end, a fixing frame is arranged at the water inlet end and the water outlet end, a spring is arranged between the first-stage valve clack and the fixing frame, a spring is also arranged between the first-stage valve clack and the second-stage valve clack, a double-valve clack is designed to form a double-check function, and the check valve can also quickly and effectively prevent the backflow of media, and can also prolong the service lives of the valve and a connecting pipeline.
Disclosure of Invention
The invention aims to provide a low-resistance backflow preventer to solve the defects in the prior art.
The technical scheme for solving the technical problems is as follows:
A low-resistance backflow preventer comprises a valve body formed by a water inlet valve body and a water outlet valve body, a first-stage check valve positioned at a valve inlet of the water inlet valve body, and a second-stage check valve positioned at a valve outlet of the water outlet valve body, wherein an intermediate chamber is arranged between the first-stage check valve and the second-stage check valve, the first-stage check valve comprises an inlet check valve seat, an inlet check valve flap and an inlet check spring, the inlet check valve flap is contacted with the inlet check valve seat and blocks the passage of fluid under the tension of the inlet check spring, the second-stage check valve comprises an outlet check spring, an outlet check valve flap and an outlet check valve seat, the outlet check valve flap is contacted with the outlet check valve seat and blocks the passage of fluid under the pressure of the outlet check spring, the inlet check valve seat is positioned in the intermediate position and is fixed with the water inlet valve body, the outlet check valve seat is positioned in the intermediate position of the water outlet valve body and fixedly connected with the water outlet valve body, the outlet check valve flap is an annular valve flap,
Further, the inlet check spring is fixed on the spring locking block through a spring pressing head;
Furthermore, a water drain valve is arranged below the middle chamber and connected with a first pipe joint, the valve body is connected with a second pipe joint, and a stainless steel pipe is arranged between the first pipe joint and the second pipe joint;
Further, an O-shaped ring II is arranged at the joint of the outlet check valve seat and the valve body;
Furthermore, an O-shaped ring I is arranged at the joint of the inlet check valve seat and the valve body, and an elastic check ring for holes is arranged at the contact part of the inlet check valve seat and the inlet check valve clack;
Further, an inner and outer wire stainless steel ball valve is arranged above the water inlet valve body.
The invention has the beneficial effects that the structure ensures that the water flow of the backflow preventer can flow out of the valve body only by turning over once in the valve, thereby reducing the total flow resistance of the backflow preventer, and the whole device has simple structure and is convenient to assemble, disassemble and maintain.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
the reference numerals are explained as follows:
1. A water discharge valve, 2, a first pipe joint, 3, a stainless steel pipe, 4, a second pipe joint, 5, a hexagon bolt, 6, a spring washer, 7, an outlet check spring, 8, an outlet check valve clack, 9, an outlet check valve seat, 10, a water outlet valve body, 11 and an O-shaped ring I, 12, a circlip for holes, 13, a second O-shaped ring, 14, an inlet check valve seat, 15, an inlet check valve clack, 16, an inlet check spring, 17, a spring pressure head, 18, a spring locking block, 19, a water inlet valve body, 20 and an inner and outer wire stainless steel ball valve;
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
The low-resistance backflow preventer comprises a valve body formed by a water inlet valve body and a water outlet valve body, a first-stage check valve positioned at a valve inlet of the water inlet valve body, and a second-stage check valve positioned at a valve outlet of the water outlet valve body, wherein an intermediate chamber is arranged between the first-stage check valve and the second-stage check valve, the first-stage check valve comprises an inlet check valve seat, an inlet check valve flap and an inlet check spring, the inlet check valve flap contacts with the inlet check valve seat under the tension of the inlet check spring and blocks the passage of fluid, the second-stage check valve comprises an outlet check spring, an outlet check valve flap and an outlet check valve seat, the outlet check valve flap contacts with the outlet check valve seat under the pressure of the outlet check spring and blocks the passage of fluid, the inlet check valve seat is positioned in the intermediate position of the valve outlet of the water outlet valve body and fixedly connected with the water outlet valve body, the outlet check valve flap is an annular valve flap,
More specifically, the inlet check spring is fixed on the spring locking block through a spring pressing head;
more specifically, a water drain valve is arranged below the middle chamber, the water drain valve is connected with a first pipe joint, the valve body is connected with a second pipe joint, and a stainless steel pipe is arranged between the first pipe joint and the second pipe joint;
in order to improve the sealing performance, an O-shaped ring II is arranged at the joint of the outlet check valve seat and the valve body;
In order to improve the sealing performance, an O-shaped ring I is arranged at the joint of the inlet check valve seat and the valve body, and an elastic check ring for holes is arranged at the contact part of the inlet check valve seat and the inlet check valve clack;
More specifically, an inner and outer wire stainless steel ball valve is arranged above the water inlet valve body.
The action principle is that the valve inlet is a first-stage check valve, the inlet check valve seat 14, the inlet check valve clack 15, the inlet check spring 16, the spring pressure head 17 and the spring locking block 18 are formed, and water flows into the middle chamber through the inlet check valve clack 15. The water cannot flow back to the inlet due to the action of the inlet check spring 16. The second stage check valve consists of an outlet check spring 7, an outlet check valve flap 8 and an outlet check valve seat 9. Water can flow out of the valve through the outlet check valve flap 8 and cannot flow back into the intermediate chamber due to the action of the outlet check spring 7. The outlet check valve clack 8 is an annular valve clack, the water flow channel is an annular core part of the valve clack, and the technical scheme has the advantages that the water flow of the backflow preventer can flow out of the valve body only by turning once in the valve, so that the total flow resistance of the backflow preventer is reduced.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (6)
1. A low-resistance backflow preventer is characterized by comprising a valve body formed by a water inlet valve body and a water outlet valve body, a first-stage check valve positioned at a valve inlet of the water inlet valve body, and a second-stage check valve positioned at a valve outlet of the water outlet valve body, wherein an intermediate chamber is arranged between the first-stage check valve and the second-stage check valve, the first-stage check valve comprises an inlet check valve seat, an inlet check valve flap and an inlet check spring, the inlet check valve flap is contacted with the inlet check valve seat under the tension of the inlet check spring and blocks the passage of fluid, the second-stage check valve comprises an outlet check spring, an outlet check valve flap and an outlet check valve seat, the outlet check valve flap is contacted with the outlet check valve seat under the pressure of the outlet check spring and blocks the passage of fluid, the inlet check valve seat is positioned in the intermediate position, the inlet check valve seat is fixed with the water inlet valve body, the outlet check valve seat is fixedly connected with the water outlet valve body, and the outlet check valve flap is an annular valve flap;
The water flow channel is an annular core of the valve clack.
2. A low resistance backflow preventer according to claim 1, wherein the inlet check spring is secured to the spring lock block by a spring ram.
3. The low-resistance backflow preventer according to claim 2, wherein a water drain valve is arranged below the middle chamber, the water drain valve is connected with a first pipe joint, the valve body is connected with a second pipe joint, a stainless steel pipe is arranged between the first pipe joint and the second pipe joint, the second pipe joint is fixedly connected with the valve body through a hexagon head bolt, and a spring washer for buffering is arranged below the hexagon head bolt.
4. A low resistance backflow preventer according to claim 3, wherein the outlet check valve seat and the valve body are provided with a second O-ring.
5. The low-resistance backflow preventer of claim 4, wherein the O-ring I is arranged at the joint of the inlet check valve seat and the valve body, and the circlip for holes is arranged at the joint of the inlet check valve seat and the inlet check valve clack.
6. The low-resistance backflow preventer of claim 5, wherein the upper portion of the water inlet valve body is provided with an inner and outer stainless steel ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810767283.0A CN108591543B (en) | 2018-07-13 | 2018-07-13 | A low resistance backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810767283.0A CN108591543B (en) | 2018-07-13 | 2018-07-13 | A low resistance backflow preventer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108591543A CN108591543A (en) | 2018-09-28 |
| CN108591543B true CN108591543B (en) | 2025-03-28 |
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ID=63618234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810767283.0A Active CN108591543B (en) | 2018-07-13 | 2018-07-13 | A low resistance backflow preventer |
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| Country | Link |
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| CN (1) | CN108591543B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725976B (en) * | 2019-10-21 | 2024-09-20 | 天津市塘沽第一阀门有限公司 | Sealing valve clack device for water inlet end of backflow preventer |
| CN114215935B (en) * | 2021-12-27 | 2025-09-12 | 安徽红星阀门有限公司 | A backflow preventer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203809791U (en) * | 2013-09-10 | 2014-09-03 | 上海润水流体设备有限公司 | Novel backflow preventer |
| CN208417632U (en) * | 2018-07-13 | 2019-01-22 | 中阀控股（集团）有限公司 | A kind of low resistance force counter flow stop |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006029573A (en) * | 2004-06-18 | 2006-02-02 | Onda Seisakusho Seki Kojo:Kk | Check valve with pressure relief structure |
| CN102252116B (en) * | 2011-07-18 | 2013-03-20 | 浙江盾安阀门有限公司 | Diaphragm-inbuilt type low-resistance backflow preventer |
| CN205136688U (en) * | 2015-12-04 | 2016-04-06 | 正丰阀门集团有限公司 | Low resistance backflow preventer |
| CN207005370U (en) * | 2017-07-05 | 2018-02-13 | 苏州普联力量智能流体控制有限公司 | One kind exempts from drain valve seat low resistance force counter flow stop |
| CN107842634A (en) * | 2017-12-05 | 2018-03-27 | 博纳斯威阀门股份有限公司 | A kind of Double-clack axial flow type check valve |
-
2018
- 2018-07-13 CN CN201810767283.0A patent/CN108591543B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203809791U (en) * | 2013-09-10 | 2014-09-03 | 上海润水流体设备有限公司 | Novel backflow preventer |
| CN208417632U (en) * | 2018-07-13 | 2019-01-22 | 中阀控股（集团）有限公司 | A kind of low resistance force counter flow stop |
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| Publication number | Publication date |
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| CN108591543A (en) | 2018-09-28 |
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