CN200982473Y - Automatic backwash control valve - Google Patents
Automatic backwash control valve Download PDFInfo
- Publication number
- CN200982473Y CN200982473Y CN 200620167742 CN200620167742U CN200982473Y CN 200982473 Y CN200982473 Y CN 200982473Y CN 200620167742 CN200620167742 CN 200620167742 CN 200620167742 U CN200620167742 U CN 200620167742U CN 200982473 Y CN200982473 Y CN 200982473Y
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- China
- Prior art keywords
- piston
- diaphragm
- valve body
- gland
- valve
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- Expired - Lifetime
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Abstract
The utility model relates to a control valve which can automatically backwash a farm irrigation filtration system, essentially comprising a tubular valve body, a stressed top arranged with a valve, a water outlet pipe, a pollution discharge pipe, a water inlet pipe, a spacing pressure plate, a plunger chamber, a central plunger link mechanism, a membrane and an offsetting spring arranged on an elastomer diaphragm. The utility model controls a magnetic valve, thereby realizing the backwash of the irrigation system. The utility model has the advantages of simple structure, convenient operation, economy, and evident effect.
Description
Technical field
The utility model relates to a kind of control valve that the field irrigation filtration system is carried out automatic backwash.
Background technique
The current filter that is used for farm irrigation system generally all adopts manual control valve, complex operation, rinsing quality can not in time be guaranteed, it has some to adopt automatic two logical control valves, the cost height, install inconvenient, adopt the threeway backwash valve exactly, the disclosed full-automatic back washing control valve of patent CN 2720225Y for example, it mainly comprises valve body, it is characterized in that on valve body, being provided with the backwash water outlet, be provided with backwash seat and backwash valve axon in this backwash water outlet, be provided with rubber tile pull head and backwash seal ring on the valve body axle, valve body is provided with gland, has the rubber die head at gland, make and form a cavity between gland and the rubber die head, described valve body axle is connected on the rubber die head, and gland is provided with the control intake pipe, and the water channel in the water intake of valve body is provided with the valve body film lobe cambered surface that fits with rubber die head cambered surface.But it is not provided with Returnning spring, and its elastomer diaphragm needs long-term action, and does not have what position-limit mechanism, makes elastomer diaphragm constantly impaired, influences rinsing quality and backwash effect, and increases maintenance cost.
Summary of the invention
The purpose of this utility model is to solve existing automatic backwash control valve and does not cause diaphragm impaired because of having Returnning spring and position-limit mechanism, thereby causes that flushing and backwash effect are poor, even can't proper functioning, and the problem of increase maintenance cost.
Its basic structure of the utility model mainly comprises: tubular valve body, the gland that is provided with valve, outlet pipe, drain pipe, intake pipe, limiting board, piston cavity, center piston linkage mechanism and be located at spring on the diaphragm.Connecting rod one end of center piston linkage mechanism is connected with piston, and the other end is connected with diaphragm, form a cavity between its diaphragm and the loam cake, in the last control electromagnetic valve that is covered with, come the direction of current in the control chamber, and above the cavity interior diaphragm, spring is housed, assist resetting of diaphragm, reduce the stressed of diaphragm, secondly the piston of center piston linkage mechanism is positioned at piston cavity, and the two ends of piston cavity are provided with limiting board, piston can only be moved within the specific limits, and adopt inner concave arc surface at which the limiting board end face that contacts with diaphragm, and make the inner concave arc surface of diaphragm and limiting board tightly fit, can prevent that elastomer diaphragm from exerting oneself excessive and damage.And be provided with valve last covering, can come the open and close of control electromagnetic valve by automatic or manual.
Because of the utility model has additional limiting board and Returnning spring, thereby can realize that diaphragm automatically resets, it is impaired to reduce diaphragm, improves diaphragm working life, easy to operate, the rinsing quality height.
Description of drawings
Accompanying drawing 1 is an embodiment's of the present utility model structural representation
1 is that tubular valve body, 2 is that gland, 3 is that piston, 4 is that Returnning spring, 5 is that connecting rod, 6 is that diaphragm, 7 is that gland water intake, 8 is that limiting board, 9 is that valve, 10 is that gland water outlet, 11 is that drain pipe, 12 is that outlet pipe, 13 is that intake pipe, 14 is that piston cavity, 15 is a position limit cycle among Fig. 1.
Embodiment
Embodiment: comprise tubular valve body 1, its valve body is provided with intake pipe 13, outlet pipe 12, the piston cavity 14 of drain pipe 11 and valve inner, its intake pipe 13 and outlet pipe 12 all with valve body in the middle of piston cavity 14 in link to each other, and drain pipe 11 links to each other with the outside in valve body inner carrier chamber 14, the bottom of piston cavity and top are respectively equipped with limiting board 8 and position limit cycle 15, be provided with piston 3 in the piston cavity 14, piston 3 links to each other with diaphragm 6 by connecting rod 5, valve body is provided with gland 2, make to form a cavity between diaphragm 6 and the gland 2, be provided with Returnning spring 4 in the cavity, its gland is provided with water outlet 10, the other end of outlet pipe is provided with control valve 9, and valve adopts manually or automatically can.
Normally flinging when washing, water is entered by intake pipe, under the effect of hydraulic pressure, the promotion piston moves upward, the thickness of its piston is greater than the diameter of bore of outlet pipe, and to guarantee the into pressure of water, piston links to each other with diaphragm by connecting rod, be provided with Returnning spring between diaphragm and the loam cake, reduce the suffered impact force of diaphragm, and piston motion contacts during to certain degree with limiting board, can not continue to move upward, the intake pipe that makes communicates with outlet pipe; And when the backwash state, water entered in the cavity between gland and the diaphragm by the water intake on the gland before this, under the effect of hydraulic pressure and spring, make diaphragm move downward, diaphragm drives piston by connecting rod and moves downward together, and motion to a certain degree, piston contacts with the position limit cycle of piston cavity bottom, thereby it is impaired to reduce diaphragm, at this moment makes outlet pipe link to each other with drain pipe, controls finishing of backwash.In a word, this piston and diaphragm can only to-and-fro motion in certain space, can reduce the stressed problem of diaphragm since like this, increase the working life of diaphragm.
Claims (7)
1, a kind of automatic backwash control valve, comprise the tubular valve body, gland, outlet pipe, drain pipe, intake pipe, limiting board, piston cavity, the center piston linkage mechanism, diaphragm and be located at spring on the diaphragm, it is characterized in that gland is provided with intake-outlet, be provided with diaphragm between gland and the valve body, between diaphragm and the gland cavity is arranged, be provided with Returnning spring in the chamber, the valve body inner bottom part is provided with piston cavity, be provided with piston in the piston cavity, the top of piston cavity is provided with limiting board, and piston links to each other with diaphragm by connecting rod, and the valve body bottom is provided with the intake pipe that communicates with piston cavity, the valve body side is provided with the outlet pipe that communicates with piston cavity, and the valve body side is provided with drain pipe.
2, automatic backwash control valve as claimed in claim 1 is characterized in that valve body is a tubular, and gland is a circular arc.
3, as claim 1,2 described automatic backwash control valves, two ends are for conical up and down to it is characterized in that piston, and the limiting board lower end also is conical, fits with the piston upper end, and the limiting board top is an inner concave arc surface.
4, as claim 1,2,3 described automatic backwash control valves, it is characterized in that the interior bottom of piston cavity is provided with taper ring.
5, as claim 1,2,3,4 described automatic backwash control valves, it is characterized in that the thickness of piston is greater than the diameter of bore of outlet pipe.
6, as claim 1,2,3,4,5 described automatic backwash control valves, it is characterized in that the gland upper intake is provided with valve.
7, as claim 1,2,3,4,5,6 described automatic backwash control valves, it is characterized in that Returnning spring is placed in the top of connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620167742 CN200982473Y (en) | 2006-11-30 | 2006-11-30 | Automatic backwash control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620167742 CN200982473Y (en) | 2006-11-30 | 2006-11-30 | Automatic backwash control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200982473Y true CN200982473Y (en) | 2007-11-28 |
Family
ID=38909631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620167742 Expired - Lifetime CN200982473Y (en) | 2006-11-30 | 2006-11-30 | Automatic backwash control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200982473Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174848A (en) * | 2013-03-27 | 2013-06-26 | 上海电机学院 | Two-station three-way normally-open-type backwashing valve |
| CN112763127A (en) * | 2020-12-28 | 2021-05-07 | 南京沃天科技股份有限公司 | Novel pneumatic pressure transmitter |
-
2006
- 2006-11-30 CN CN 200620167742 patent/CN200982473Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174848A (en) * | 2013-03-27 | 2013-06-26 | 上海电机学院 | Two-station three-way normally-open-type backwashing valve |
| CN112763127A (en) * | 2020-12-28 | 2021-05-07 | 南京沃天科技股份有限公司 | Novel pneumatic pressure transmitter |
| CN112763127B (en) * | 2020-12-28 | 2022-09-06 | 南京沃天科技股份有限公司 | Pneumatic pressure transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071128 |
|
| EXPY | Termination of patent right or utility model |