CN200989477Y - No-return valve - Google Patents
No-return valve Download PDFInfo
- Publication number
- CN200989477Y CN200989477Y CNU200620062749XU CN200620062749U CN200989477Y CN 200989477 Y CN200989477 Y CN 200989477Y CN U200620062749X U CNU200620062749X U CN U200620062749XU CN 200620062749 U CN200620062749 U CN 200620062749U CN 200989477 Y CN200989477 Y CN 200989477Y
- Authority
- CN
- China
- Prior art keywords
- valve body
- valve
- spool
- safety check
- bellmouth
- Prior art date
- 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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- Check Valves (AREA)
Abstract
The utility model provides a check valve, containing a valve body, a valve core that is arranged in the valve body and a spring that is connected with the valve core, and can control the valve core to block or break away from a water inlet of the valve body, and whose outside surface is provided with a plastic coat. The utility model overcomes the effect of the eroded spring on the performance of the check valve because the spring has a plastic coat; the helicitic texture of the valve body makes the valve body convenient to connect with related accessories and to change accessories; meanwhile, a seal ring is positioned at the joint, thereby increasing the sealing performance of the check valve.
Description
Technical field
The utility model belongs to the safety check production technical field, particularly relates to a kind of durable etch-proof safety check.
Technical background
Existing safety check generally includes two kinds of ball formula and springs, the valve body of ball check valve must be arranged to taper shape, and the ball of diameter greater than the awl mouth is set in valve body, and ball breaks away from the awl mouth under the impact at current in the water inlet process of safety check, all the other then block the awl mouth, prevent to flow backwards.Its shortcoming is that valve body must be arranged to cone, under the situation of the identical water yield of flowing through, and the space that the valve body waste is too much.
And spring loaded check valve, block or break away from the water intake of valve body by the spool that is connected with spring, in the water inlet process, spool is under the impact of current, drive length of spring compressed, spool breaks away from water intake, after the water inlet process finishes, under the reset response power of spring, spool is blocked water intake, prevents to flow backwards, its valve body can be arranged to the cylindrical shape of certain diameter according to the size of the water yield, space availability ratio is higher, yet is easy to be corroded behind spring peracid, alkali or the use certain hour, has influenced the using effect of safety check.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of space availability ratio high and durable safety check.
In order to realize the foregoing invention purpose, the technological scheme of employing is as follows:
A kind of safety check comprises valve body, is arranged at the spool of valve inner, is connected with spool and the spring of valve inleting water mouth is blocked or broken away to the may command spool, and described spring outer surface is provided with plastic coating.
The utility model is by being provided with plastic coating at the spring outer surface, when having avoided spring peracid, alkali or soak suffered corrosion for a long time.
In the technique scheme, the outer surface of described valve inleting water mouth end is provided with screw thread, and the nut that have ring washer corresponding with screw thread.Connect by the nut that has back-up ring, make the utility model be convenient to related accessory is set, as filter screen and bonding bellmouth etc. in two ends of valve body.
The water intake of described valve body is provided with bellmouth.Can accept with other related accessory by this bellmouth.
The contact jaw of described bellmouth and valve inleting water mouth is provided with by the adpting flange of the back-up ring of nut and the clamping of valve inleting water mouth end face.Adpting flange is touched the water intake end face of valve body, screw nut and then can realize being connected of bellmouth and valve body.
Be provided with seal ring between the adpting flange of described valve inleting water mouth end face and bellmouth.Described seal ring can adopt the compression type seal ring, has increased the sealing that is connected between valve inleting water mouth and the bellmouth.
Described spool also is provided with the seal ring that can contact with the adpting flange of bellmouth.The structure of spool comprises two sections that diameter does not wait, wherein one section diameter is less than the internal diameter of bellmouth adpting flange, the diameter of another section is then greater than the internal diameter of adpting flange, also be provided with the rectangular ring groove between these two sections, described seal ring is arranged in the groove, adopts the compression type seal ring, when spool is blocked water intake, one section adpting flange by the tight bellmouth of seal ring that diameter is bigger has further been realized sealability.
The inlet end of described valve body is cylindrical, and it is conical that water outlet end then is.In the water inlet process, spool is under the impact of current, pressure spring contracts inward, forms the gap that current pass through between spool and bellmouth adpting flange, and current are big more, the gap is also big more, and because the stopping of spool, the water yield of being flowed through is less than the water yield under the straight-through situation after all, so taper shape is arranged in the waterexit end of valve body, make current smooth and easy, save the space again.
The utility model is by coating plastic coating at spring, overcome spring and corroded the performance impact of being brought safety check, worm structure by valve body again, being convenient to valve body is connected with related accessory, also change accessory easily, by the joint seal ring is set simultaneously, has strengthened the sealability of safety check.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Structural representation of the present utility model comprises valve body 1, spool 2, bonding bellmouth 3, plastic coating spring 4, nut 5, compression type seal ring 6, compression type seal ring 7 as shown in Figure 1.
The inlet end of valve body 1 is columnar structured, and water outlet end then is arranged to conical structure, and the outer surface of cylinder is provided with the screw thread that coincide with nut 5, and the end of nut 5 is provided with back-up ring.
Bonding bellmouth 3 is arranged at the inlet end of valve body, is clamped by the water intake end face of nut 5 and cylinder valve 1 by adpting flange.
Be provided with between the water intake end face of valve body 1 and the adpting flange of bonding bellmouth 3 and change compression type seal ring 7 into.
Spool 2 also is provided with the rectangular ring groove between waney two sections, is placed with compression type seal ring 6 in the groove.
Adopt the utility model, when safety check is in into the water process, spool 2 is at the impact lower compression spring 4 past retractions of current, when the water inlet process finishes, spool 2 withstands water intake under the restoring force effect of spring 4, this moment, spool 2 diameters bigger a section compressed the adpting flange of bellmouth by seal ring 6, had both prevented to flow backwards, and had realized sealability again.
Claims (7)
1, a kind of safety check comprises valve body, is arranged at the spool of valve inner, is connected with spool and the spring of valve inleting water mouth is blocked or broken away to the may command spool, it is characterized in that described spring outer surface is provided with plastic coating.
2, safety check according to claim 1 is characterized in that the outer surface of described valve inleting water mouth end is provided with screw thread, and the nut that have ring washer corresponding with screw thread.
3, safety check according to claim 1 and 2 is characterized in that the inlet end of described valve body is provided with bellmouth.
4, safety check according to claim 3 is characterized in that the contact jaw of described bellmouth and valve inleting water mouth is provided with by the adpting flange of the back-up ring of nut and the clamping of valve inleting water mouth end face.
5, safety check according to claim 4 is characterized in that being provided with seal ring between the adpting flange of described valve inleting water mouth end face and bellmouth.
6, safety check according to claim 5 is characterized in that being provided with seal ring between described spool and the bellmouth adpting flange.
7, safety check according to claim 6 is characterized in that the inlet end of described valve body is cylindrical, and it is conical that water outlet end then is.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620062749XU CN200989477Y (en) | 2006-08-09 | 2006-08-09 | No-return valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620062749XU CN200989477Y (en) | 2006-08-09 | 2006-08-09 | No-return valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200989477Y true CN200989477Y (en) | 2007-12-12 |
Family
ID=38940515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200620062749XU Expired - Lifetime CN200989477Y (en) | 2006-08-09 | 2006-08-09 | No-return valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200989477Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791500A (en) * | 2015-04-17 | 2015-07-22 | 泰州市自立环保管件设备厂 | Ultrastrong corrosion resisting stainless steel casting valve for ship |
| CN106151609A (en) * | 2015-03-26 | 2016-11-23 | 佛山市顺德区美的饮水机制造有限公司 | Water route extension check valve, integrating water route plate and water purifier |
| CN106641348A (en) * | 2016-11-18 | 2017-05-10 | 浙江美罗机电有限公司 | Check valve assembly structure |
-
2006
- 2006-08-09 CN CNU200620062749XU patent/CN200989477Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151609A (en) * | 2015-03-26 | 2016-11-23 | 佛山市顺德区美的饮水机制造有限公司 | Water route extension check valve, integrating water route plate and water purifier |
| CN106151609B (en) * | 2015-03-26 | 2018-11-06 | 佛山市顺德区美的饮水机制造有限公司 | Water route extends check valve, integrating water route plate and water purifier |
| CN104791500A (en) * | 2015-04-17 | 2015-07-22 | 泰州市自立环保管件设备厂 | Ultrastrong corrosion resisting stainless steel casting valve for ship |
| CN106641348A (en) * | 2016-11-18 | 2017-05-10 | 浙江美罗机电有限公司 | Check valve assembly structure |
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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: 20071212 |
|
| EXPY | Termination of patent right or utility model |