CN201547347U - Backflow preventer - Google Patents
Backflow preventer Download PDFInfo
- Publication number
- CN201547347U CN201547347U CN2009200874630U CN200920087463U CN201547347U CN 201547347 U CN201547347 U CN 201547347U CN 2009200874630 U CN2009200874630 U CN 2009200874630U CN 200920087463 U CN200920087463 U CN 200920087463U CN 201547347 U CN201547347 U CN 201547347U
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- China
- Prior art keywords
- valve
- valve body
- backflow preventer
- face
- valve seat
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a backflow preventer which comprises a valve body on which an access hole connected with a valve cover is arranged. Valve bodies at two sides of the access hole are respectively provided with detachable check valve components. A water discharge valve is arranged on the valve body between the two check valve components. The backflow preventer utilizes the two detachable check valve components at the two ends of an individual valve body or an assembled valve body, and the access hole and the valve cover are further arranged at the upper part of the valve body. Therefore, online overhaul can be carried out, i.e., the check valve components can be conveniently taken out for replacement or repair after the valve cover is opened.
Description
Technical field
The utility model belongs to the pipe network control valve, is specifically related to a kind of backflow preventer.
Background technique
For preventing the safety check of sewage two series connection of refluence fitness for purpose employing from pipeline is led, form backflow preventer in the water pipe pipe network.The occasion that backflow preventer is mainly used in drinking water system and pipe-line system water quality is had strict demand.The loss of head of present backflow preventer is generally 0.7kg/cm
2, loss of head is bigger, when normal water supply, just must strengthen pressure of supply water, and energy consumption is big.And this structure is comparatively complicated.Simultaneously, the non-return of pipe line check valve relies on the active force of spring to realize at present.When closing valve, spring force minimum, and valve wide open the time, spring force maximum then, therefore when system flow rate reduced, valve often was in half-open position under the spring force effect; During non-return, spring force minimum in the time of valve closing can not form effective non-return when therefore closing valve; The spring pressure maximum has a strong impact on system effectiveness during valve wide open.And existing various backflow preventers, are changed or are repaired check vavle device after backflow preventer need being pulled down from pipeline during maintenance because the restriction of structure all can not realize on-bne repair.Workload is big like this, and the repair time is long.
Summary of the invention
The utility model provides a kind of energy on-bne repair, and damage by water is hanged down the backflow preventer of quick non-return simultaneously, to address the above problem.
The technical solution of the utility model is: backflow preventer, it comprises valve body, offers access opening on the valve body, connects valve gap on the access opening, establishes dismountable check valve assembly in the valve body of access opening both sides respectively, establishes drain valve on the valve body between two check valve assemblies.
Described check valve assembly comprises support ring, and the stem guiding ring is provided with the radial support muscle between support ring and the stem guiding ring; The support ring end face is provided with magnet, and the magnet end face is established valve seat; Valve rod passes the stem guiding ring and is connected with flap, and a valve rod end boss of limiting is established spring on the valve rod between positive stop lug boss and the stem guiding ring.
Described magnet end face and valve seat form step, the corresponding step that is provided with between step and magnet end face and the valve seat sealing that fits on the flap.
Limit on the flow path wall of described valve body a step and spacing draw-in groove.
Establish support ring limited step and valve seat limited step on the described valve body one end flow path wall; Establish the valve seat limited step on the valve body the other end flow path wall.
Establish the spacing draw-in groove of valve seat end face on the described valve body one end flow path wall, establish the spacing snap ring of valve seat end face in the spacing draw-in groove; Establish the spacing draw-in groove of support ring end face on the valve body the other end flow path wall, spacing draw-in groove is established the spacing snap ring of support ring end face.
Described drain valve comprises the discharge opening that valve body lower end is established, and establishes drain valve seat on the discharge opening, and the sluicing flap connects valve rod, and the diaphragm apparatus of establishing in valve rod and the valve gap is connected.
The valve body two ends connect service valve.
The employing of this backflow preventer is provided with two detachable non-return assemblies at the two ends of single valve body or combinaing valve body, simultaneously access opening and valve gap are set on valve body top, can be implemented in line maintenance like this, promptly open valve gap after, can take out the non-return assembly easily and change or repair; Adopt the combined mechanism of magnetic force and spring mechanical elastic force cooperative action performance simultaneously, compare with traditional like product, owing to adopted this pull characteristics of magnet to be the part of hyperbola distribution, guarantee that valve can guarantee that when complete shut-down enough valve closing power can provide enough pressure reduction again, guarantee the stability of valve performance, the real realization hanged down damage by water under the satisfied condition that prevents from fully to flow backwards, back safety check also is to adopt this structure, but its spring force only is used to guarantee the action of flap, reduce damage by water especially greatly, thereby the whole damage by water that realizes is 4 meter water columns.In addition, the structure of this product and performance requirement had both met standards such as C511, AWWA, met present situation domestic and that some Northern European countries's low pressure supply water again, simple from the structure installation and maintenance, low cost of manufacture be we can say on using and can be promoted in worldwide almost without limits.
Description of drawings
Fig. 1 backflow preventer structural representation.
Fig. 2 backflow preventer Working state analysis figure.
Fig. 3 backflow preventer is opened Working state analysis figure.
Embodiment
Present embodiment is used for the explanation to model utility right claim, and protection domain of the present utility model is not limited to the structure of following description.The following structural change of being done in those skilled in the art's technical solutions of the utility model that is different from all belongs to protection domain of the present utility model.
As shown in Figure 1, the feed-water end of valve body 100 is connected the valve 300,400 that is used to overhaul respectively with the waterexit end.When needing on-bne repair, will overhaul valve 300,400 and close and get final product.
Access opening 101 is offered on valve body 100 tops, and discharge opening 102 is offered in the bottom.The valve body 100 at access opening 101 places connects valve gap 200, and discharge opening 102 places connect the bucket 103 that leaks.Establish dismountable check valve assembly 301,302 in the valve body at access opening 101 two ends respectively.
Establish two limited steps 104,105 and spacing draw-in groove 106 on the water inlet flow channel wall of valve body 100; Limit on the other end flow path wall of valve body 100 step 107 and spacing draw-in groove 108;
Check valve assembly 301 comprises support ring 303, stem guiding ring 304, between support ring 303 and the stem guiding ring 304 radial support muscle 305 is set, and this structure is in order to support check-valve lever and flap; Support check-valve lever 306 passes stem guiding ring 304 and is connected with flap 307; Check-valve lever 306 ends are provided with positive stop lug boss 308, establish spring 309 on the valve rod 306 between positive stop lug boss 308 and the stem guiding ring 304.Support ring 303 end faces contact with magnet 310, and magnet 310 end faces contact with valve seat 311.
During assembling, support ring 303 is located in the ring of limited step 104 of valve body, and the end is a magnet 310; Valve seat 311 is located in the limited step 105 of valve body; Magnet 310 end faces and valve seat 311 form step 312 (shown in Figure 3) like this.
Be provided with spacing draw-in groove 106 in limited step 105 rings of valve body, it is spacing with valve seat 311 end faces to establish snap ring 109 in the spacing draw-in groove 106.
The sealing that fits of the corresponding step that is provided with step and magnet 310 end faces and valve seat 311 in the edge of flap 307.
As shown in Figure 3, establish seal boss 313 on the valve seat 311, establish on the flap 307 between the seal boss on face seals 314 and the valve seat and seal.Seal arrangement 314 can be the seal ring that flap 307 end faces are established.
The structure of check valve assembly 302 is similar to check valve assembly 301; Use institute different with the assembly relation of valve body.The limited step of establishing on the other end flow path wall of valve body 100 107 is used for the end face of valve seat 320 spacing, and support ring 321, magnet 322 and valve seat 320 all are located in the ring of limited step 107 sides.The end of the ring of the limited step 107 sides draw-in groove 108 of limiting, it is spacing with support ring 321 end faces to establish snap ring 110 in establishing in the spacing draw-in groove 108.Have step between magnet 322 and the valve seat 320, step can be realized by the difference in internal diameters of magnet 322 and valve seat 320.Magnet 322 is identical with the contact relation of magnet 310, valve seat 311 with the contact relation and the flap 307 of flap 323 with valve seat 320.
Above-mentioned flap and magnet, valve seat construction had both guaranteed that magnet was best to the sucking action of flap, guaranteed the sealing between valve seat and the flap again.
The structure of drain valve comprises the discharge opening 102 that valve body lower end is established as shown in Figure 1, establishes drain valve seat 201 on the discharge opening 102, and sluicing flap 202 connects valve rods 203, and the diaphragm apparatus of establishing in valve rod 203 and the valve gap 200 is connected.Valve gap comprises bonnet 204 and bottom flange 205; Diaphragm apparatus comprises the lower diaphragm plate 206 that is connected between valve body 100 and the bottom flange 205, connects between bonnet 204 and the bottom flange 205 to go up barrier film 207; The cavity of resorption between lower diaphragm plate 206 and the last barrier film 207 and the feed-water end of valve body 100 connect; Establish spring 208 on the valve rod 203 of the epicoele between last barrier film 207 and the bonnet 204.
Between each valve seat and the valve body Sealing can be set, it is common technology.
The main feature of backflow preventer is that the non-return system of safety check adopts the novel magnetic force and the combined mechanism of spring mechanical elastic force cooperative action performance, shown in Fig. 2,3, this structure is when the runner standard-sized sheet, the magnet suction of mechanism is zero, the flow passage resistance force of waterproof of this moment is the maximum elastic force of spring, guarantee to form enough pressure reduction with intermediate cavity before the valve by this elastic force, guarantee the sluicing condition of drain valve; And the magnetic force maximum of mechanism during the valve complete shut-down, this moment flap the power of closing for maximum, guarantee the stability of valve when zero delivery.This structure and can satisfy the key effect of backflow preventer---definitely prevent to flow backwards, can satisfy the demand in present domestic users market again---reduced damage by water, be applicable to the countries and regions that pressure of supply water is on the low side.(for the damage by water of popular in the market external product 10 meter water columns, this product reduces damage by water to 4 meter water columns, and its actual use meaning is bigger).
Claims (10)
1. backflow preventer, it comprises valve body, it is characterized in that offering access opening on the valve body, connects valve gap on the access opening, establishes dismountable check valve assembly in the valve body of access opening both sides respectively, establishes drain valve on the valve body between two check valve assemblies.
2. backflow preventer according to claim 1 is characterized in that check valve assembly comprises support ring, and the stem guiding ring is provided with the radial support muscle between support ring and the stem guiding ring; The support ring end face is provided with magnet, and the magnet end face is established valve seat; Valve rod passes the stem guiding ring and is connected with flap, and a valve rod end boss of limiting is established spring on the valve rod between positive stop lug boss and the stem guiding ring.
3. as backflow preventer as described in the claim 2, it is characterized in that magnet end face and valve seat form step, the corresponding step that is provided with between step and magnet end face and the valve seat sealing that fits on the flap.
4. as backflow preventer as described in the claim 3, it is characterized in that establishing seal boss on the valve seat, establish on the flap between the seal boss on face seals and the valve seat and seal.
5. backflow preventer as claimed in claim 1 or 2 is characterized in that limit on the flow path wall of valve body a step and spacing draw-in groove.
6. as backflow preventer as described in the claim 5, it is characterized in that establishing support ring limited step and valve seat limited step on the valve body one end flow path wall; Establish the valve seat limited step on the valve body the other end flow path wall.
7. as backflow preventer as described in the claim 5, it is characterized in that establishing the spacing draw-in groove of valve seat end face on the valve body one end flow path wall, establish the spacing snap ring of valve seat end face in the spacing draw-in groove; Establish the spacing draw-in groove of support ring end face on the valve body the other end flow path wall, spacing draw-in groove is established the spacing snap ring of support ring end face.
8. backflow preventer according to claim 1 is characterized in that drain valve comprises the discharge opening that valve body lower end is established, and establishes drain valve seat on the discharge opening, and the sluicing flap connects valve rod, and the diaphragm apparatus of establishing in valve rod and the valve gap is connected.
9. as backflow preventer as described in the claim 8, it is characterized in that valve gap comprises bonnet and bottom flange; The lower diaphragm plate that is connected between valve body and the bottom flange connects between bonnet and the bottom flange and goes up barrier film; The cavity of resorption between lower diaphragm plate and the last barrier film and the feed-water end of valve body connect; Establish spring on the valve rod of the epicoele between last barrier film and the bonnet.
10. backflow preventer according to claim 1 is characterized in that the valve body two ends connect service valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200874630U CN201547347U (en) | 2009-07-21 | 2009-07-21 | Backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200874630U CN201547347U (en) | 2009-07-21 | 2009-07-21 | Backflow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201547347U true CN201547347U (en) | 2010-08-11 |
Family
ID=42602520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200874630U Expired - Lifetime CN201547347U (en) | 2009-07-21 | 2009-07-21 | Backflow preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201547347U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821969A (en) * | 2014-01-28 | 2014-05-28 | 何际跃 | Follow-up backflow preventer |
| CN105927767A (en) * | 2016-07-28 | 2016-09-07 | 广东永泉阀门科技有限公司 | Novel low-resistance backflow preventer |
-
2009
- 2009-07-21 CN CN2009200874630U patent/CN201547347U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821969A (en) * | 2014-01-28 | 2014-05-28 | 何际跃 | Follow-up backflow preventer |
| CN105927767A (en) * | 2016-07-28 | 2016-09-07 | 广东永泉阀门科技有限公司 | Novel low-resistance backflow preventer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: WUHAN DAYU VALVE CO., LTD. Free format text: FORMER NAME: WUHAN DAYU VALVE MANUFACTURING CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 430056 Hubei city of Wuhan province Wuhan economic and Technological Development Zone Science and Technology Industrial Park Yang Dun Patentee after: Wuhan Dayu Valve Co., Ltd. Address before: 430056 Hubei city of Wuhan province Zhuankou Wuhan economic and Technological Development Zone Science and Technology Industrial Park Wuhan Dun Yang Yu Valve Manufacturing Co. Ltd Patentee before: Wuhan Dayu Valve Manufacturing Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100811 |