CN102297268A - Air valve for fire hydrant - Google Patents
Air valve for fire hydrant Download PDFInfo
- Publication number
- CN102297268A CN102297268A CN2011102309459A CN201110230945A CN102297268A CN 102297268 A CN102297268 A CN 102297268A CN 2011102309459 A CN2011102309459 A CN 2011102309459A CN 201110230945 A CN201110230945 A CN 201110230945A CN 102297268 A CN102297268 A CN 102297268A
- Authority
- CN
- China
- Prior art keywords
- fire hydrant
- steel ball
- valve
- hydrant
- valve body
- 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.)
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Abstract
The invention relates to an air valve for a fire hydrant, which comprises a valve body; a steel ball is arranged in the inner cavity of the valve body; an air hole is arranged on the upper end of the valve body; and a rubber seal ring which is matched with the steel ball is arranged at the inner port of the air hole. The circumferential lines of the seal ring and the steel ring are contacted. When the air valve for the fire hydrant is installed, the valve body is fixedly connected onto the plug of the fire hydrant by welding, bonding or a thread, so that the inner cavity of a hydrant body is communicated with the outside environment through the inner cavity of the valve body and the air hole; when the air valve for the fire hydrant is used, because water pressure exists in the hydrant body, the steel ball can block the air hole and the seal ring can seal, so that the fire hydrant can work normally; after the air valve for the fire hydrant is used, a water inlet valve is closed, the pressure of the inner cavity of the hydrant body is reduced, the steel ball leaves the seal ring, so that the inner cavity of the hydrant body is communicated with the outside environment, water accumulated in the hydrant body can be smoothly drained, and the role of the seal ring not only improves a sealing effect but also prevents the steel ball from being contacted with the valve body and being damaged.
Description
Technical field
The present invention relates to a kind of air valve, particularly a kind of air valve that is used for fire hydrant.
Background technique
Fire hydrant comprises the key that joins with intake pipe and outlet pipe, is provided with stifle on key.Use back key inner chamber to have ponding, because each valve of water pipe all is in closed condition, therefore, inboard water can't be discharged, and particularly bursting by freezing fire hydrant phenomenon often takes place north of china in winter.
Summary of the invention
The purpose of this invention is to provide a kind of air valve that is used for fire hydrant that makes fire hydrant inner chamber water discharge, prevent the bursting by freezing in winter smoothly, overcome the deficiencies in the prior art.
The air valve that is used for fire hydrant of the present invention comprises valve body, and the inner chamber of valve body has steel ball, in the upper end of valve body pore is arranged, and the inner port place of pore is provided with the rubber seal that matches with steel ball.
The air valve that is used for fire hydrant of the present invention, wherein said seal ring is that circumference contacts with steel ball.
The air valve that is used for fire hydrant of the present invention, during installation valve body is fixedly connected on the stifle of fire hydrant, can adopt welding or bonding or thread connecting mode, the key inner chamber is in communication with the outside by body cavity and pore, during use, owing to hydraulic pressure is arranged in the key, but steel ball shutoff pore and by seal ring sealing, fire hydrant proper functioning, with after, inlet valve is closed, and the key chamber pressure reduces, and steel ball leaves seal ring, the key inner chamber is in communication with the outside, ponding in the key can be discharged smoothly, and the effect of seal ring has not only improved sealing effect, and has prevented that steel ball from contacting with valve body and the degree of impairment generation occurs.
Description of drawings
Fig. 1 is the structural representation when steel ball leaves pore in the specific embodiment of the invention;
Fig. 2 is the structural representation during steel ball shutoff pore in the specific embodiment of the invention.
Embodiment
As shown in Figure 1, 2: 1 is valve body cylindraceous, and the inner chamber of valve body 1 has steel ball 2, and circular pore 3 is arranged in the upper end of valve body 1, and the inner port place of pore 3 is provided with the rubber seal 4 that matches with steel ball 2.Seal ring 4 and valve are bonding between 1 originally, or are processed with groove on valve body 1, and seal ring embeds in the groove.Seal ring 4 contacts for circumference with steel ball 2.
Claims (2)
1. air valve that is used for fire hydrant, it is characterized in that: comprise valve body (1), the inner chamber of valve body (1) has steel ball (2), in the upper end of valve body (1) pore (3) is arranged, and the inner port place of pore (3) is provided with the rubber seal (4) that matches with steel ball (2).
2. the air valve that is used for fire hydrant according to claim 1 is characterized in that: described seal ring (4) contacts for circumference with steel ball (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102309459A CN102297268A (en) | 2011-08-12 | 2011-08-12 | Air valve for fire hydrant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102309459A CN102297268A (en) | 2011-08-12 | 2011-08-12 | Air valve for fire hydrant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102297268A true CN102297268A (en) | 2011-12-28 |
Family
ID=45357870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102309459A Pending CN102297268A (en) | 2011-08-12 | 2011-08-12 | Air valve for fire hydrant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102297268A (en) |
-
2011
- 2011-08-12 CN CN2011102309459A patent/CN102297268A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111228 |