CN202612661U - Nodular cast iron air-conditioner stop valve - Google Patents
Nodular cast iron air-conditioner stop valve Download PDFInfo
- Publication number
- CN202612661U CN202612661U CN 201220024292 CN201220024292U CN202612661U CN 202612661 U CN202612661 U CN 202612661U CN 201220024292 CN201220024292 CN 201220024292 CN 201220024292 U CN201220024292 U CN 201220024292U CN 202612661 U CN202612661 U CN 202612661U
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- China
- Prior art keywords
- valve rod
- housing
- valve
- shell body
- cast iron
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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 - Fee Related
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Abstract
A nodular cast iron air-conditioner stop valve comprises a shell body, a valve rod, a connecting pipe with a flaring, a padding sealing ring and a forcing screw. The valve rod is in threaded connection with a vertical passageway of the shell body. A lower circular conical surface is arranged at the lower end of the valve rod and can cover an exit passageway of the shell body. The shell body is made of nodular cast iron in casting mode. A big passageway and a small passageway are transversely arranged on a fluid passageway of the shell body. Internal threads are arranged on the exit passageway at the lower end of the shell body and connected with external threads of a valve seat. A gasket groove and a red copper gasket are disposed in a contact position of the valve seat and the lower end face of the shell body so that the problem of leakage due to the fact that the cast iron shell body and the brass valve seat cannot be welded is solved. The connecting pipe is inserted into the lower end of the valve seat. An upper circular conical surface is further arranged on a protrusion at the lower end of the valve rod. A step is disposed in a contact position of the shell body and the upper circular conical surface of the valve rod. When the padding sealing ring is melted at a high temperature, the valve rod can be screwed upwardly to close the fluid passageway and prevent leakage. The nodular cast iron air-conditioner stop valve has the advantages of large strength, low manufacturing cost and good sealing properties.
Description
Technical field
The utility model relates to the air conditioner facility fitting field, and relating in particular to a kind of housing is the spheroidal graphite cast iron air-conditioning stop valve of cast iron.
Background technique
Follow the continuous lifting of social levels of substance, the chiller plant of hotel, hotel, office, dwelling house is extensively popularized.Air-conditioning stop valve on the existing market generally comprises housing, valve rod, seal ring etc.; Occupying the valve body gross weight adopts brass material through hot forging forming at the housing more than 80 percent mostly; Brass costs an arm and a leg, and thermal forging technology is complicated, and manufacture cost is high thus; And the brass housing need carry out the three wastes and handle in process for making, do not meet national low-carbon environment-friendly policy.
Common air-conditioning stop valve, the connecting tube of band enlarging is connected the lower end surface of housing usually through the brass valve seat, and the threaded connection place between valve seat and the housing often has fluid to leak out; Its surface of contact of connecting tube that inserts valve base inner wall also often has fluid to leak out; Means to save the situation is normally welded, and not only the complex process cost is high, in case a certain part of valve body has been broken; Can only pipe cutting integral body change valve, waste bigger.
Common stop valve flap has only the soft seal of a dao material, in case meet fire, seal ring very easily melts, and is bonded on the contiguous on every side parts, and valve is difficult to close fully, and the fluid that causes loading leaks, and causes other secondary situation.
In view of this, the inventor furthers investigate stop valve, breaks through traditional thinking, and designing a kind of housing is the air-conditioning stop valve of spheroidal graphite cast iron, and this belongs to initiative on market at home.Because the replacement of material, for assurance function, its original structure also need be done corresponding improvement, and this case produces thus.
Summary of the invention
The purpose of the utility model is to overcome the defective of above-mentioned existing technology, and a kind of spheroidal graphite cast iron air-conditioning stop valve is provided, and wear-resisting property and sealability are all fine, and be easily manufactured, in light weight, and cost reduces significantly.
To achieve these goals, the technological scheme of the utility model is following:
A kind of spheroidal graphite cast iron air-conditioning stop valve comprises connecting tube, bedding and padding seal ring, the housing pin of housing, valve rod, band enlarging;
Valve rod is the cylindrical body of top band Fang Xin, and the valve rod stage casing is provided with screw thread, and threaded stem is connected on the Vertical Channel of housing, is provided with soft packing seal ring and housing pin above the threaded stem section; The lower end protrusion of valve rod is provided with down conical surface, and following conical surface can cover the outlet passage of housing;
Housing is cast with spheroidal graphite cast iron, gone back cross setting on the vertical fluid passage of an enclosure interior major path and a small channel; The lower end of housing is provided with vertical outlet passage, has the outside thread of internal thread and valve seat to be connected on the passage, and valve seat and contacting point, housing lower end surface are provided with the pad groove of annular; Placed the red copper pad in the pad groove; Red copper is softer metal, tightens the screw thread of valve seat, can overcome the yield strength of red copper; Even not enough, the trickle manufacturing deficiency such as pit of parallelism are arranged between valve seat and the housing, also can seal valve seat and housing surface of contact well;
The connecting tube of band enlarging is inserted in the annular connecting tube groove of valve seat lower end, and connecting tube adopts the mode of brazing or bonding to be fixed on it on valve seat after inserting again, and keeps sealing state.
As preferred version, also be provided with less last conical surface on the protrusion of the lower end of valve rod, can cover top valve stem passage mouth; The last conical surface contacting point of housing and valve rod is provided with step, at high temperature melts when losing seal action when the soft seal of routine, tightens valve rod, relies on tight contact of conical surface on housing step and the valve rod can close the fluid passage, prevents heads.
The invention has the beneficial effects as follows: owing to used spheroidal graphite cast iron to replace brass to come cast housing, the impact strength of spheroidal graphite cast iron housing increases to 500Mpa, also greatly reduces manufacture cost; Owing to adopted the red copper pad, solved between cast housing and the brass valve seat because of not welding the seepage that produces; Owing on the protrusion of the lower end of valve rod, conical surface is set, on shell channel, is provided with adaptive step, so when soft packing loses seal action, can also close fluid along valve rod leakage passage up with the conical surface of valve rod.
Description of drawings
Fig. 1 is the stereogram of spheroidal graphite cast iron air-conditioning stop valve;
Fig. 2 is the left view of spheroidal graphite cast iron air-conditioning stop valve;
Fig. 3 is the sectional view along A-A line among Fig. 2;
Fig. 4 is the B enlarged view among Fig. 3;
Fig. 5 is the C enlarged view among Fig. 3;
Fig. 6 is the STRUCTURE DECOMPOSITION figure of spheroidal graphite cast iron air-conditioning stop valve.
Description of reference numerals:
1 housing, 1-1 step, 1-2 major path, 1-3 small channel, 1-4 pad groove, 1-5 connecting tube groove, 2 valve rods, the last conical surface of 2-1, conical surface, 2-3 side's core under the 2-2,3 connecting tubes, 4 housing pins, 5 valve seats, 6 red copper pads, 7 soft packings.
Embodiment
Through accompanying drawing and embodiment the utility model is done further to set forth in detail below.
A kind of structure of spheroidal graphite cast iron air-conditioning stop valve such as Fig. 1 comprise housing 1, valve rod 2, connecting tube 3, housing pin 4, valve seat 5, red copper pad 6 to shown in Figure 6.
Launch to set forth from working principle below: referring to Fig. 3; As the square core 2-3 that turns valve rod 2 upper ends; Valve rod 2 can move up and down when rotated, and when the following conical surface 2-2 of valve rod 2 lower ends covered the upper end of valve seat 5, fluid can only flow to small channel 1-3 from major path 1-2; And can not flow out from connecting tube 3, valve body plays by effect.
On valve rod 2, move, when following conical surface 2-2 lifted off a seat 5 upper end, fluid flowed to small channel 1-3 and connecting tube 3 from major path 1-2, and lift off a seat 5 upper end of following conical surface 2-2 is far away more, and the flow that gets into connecting tube 3 is big more; When the last conical surface 2-1 of valve rod 2 compresses the step 1-1 of housing, small channel 1-3 pathway closure, fluid all flows to connecting tube 3 from major path 1-2.
When soft packing 7 is lost seal action by high temperature melting; Fluid can upwards overflow along valve rod 2, in emergency circumstances, can turn valve rod 2 upwards; When the last conical surface 2-1 that treats valve rod 2 withstands the step 1-1 of housing 1; Just can play provisional seal action, the anti-fluid spill valve body pollution environment that makes progress can make the best use of time to go up and change soft packing 7.
The embodiment that the above is merely the utility model is not the restriction to this case design, and all equivalent variations of doing according to the design key of this case all fall into the protection domain of this case.
Claims (2)
1. spheroidal graphite cast iron air-conditioning stop valve comprises connecting tube, bedding and padding seal ring, the housing pin of housing, valve rod, band enlarging; It is characterized in that:
Valve rod is the cylindrical body of top band Fang Xin, and the valve rod stage casing is provided with screw thread, and threaded stem is connected on the Vertical Channel of housing, is provided with soft packing seal ring and housing pin above the threaded stem section; The lower end protrusion of valve rod is provided with down conical surface, and following conical surface can cover the outlet passage of housing;
Housing is cast with spheroidal graphite cast iron, gone back cross setting on the vertical fluid passage of an enclosure interior major path and a small channel; The lower end of housing is provided with vertical outlet passage, has the outside thread of internal thread and valve seat to be connected on the passage, and valve seat and contacting point, housing lower end surface are provided with the pad groove of annular, have placed the red copper pad in the pad groove;
The connecting tube of band enlarging is inserted in the annular connecting tube groove of valve seat lower end, and connecting tube adopts the mode of brazing or bonding to be fixed on it on valve seat after inserting again, and keeps sealing state.
2. spheroidal graphite cast iron air-conditioning stop valve according to claim 1 is characterized in that: also be provided with less last conical surface on the protrusion of described valve rod lower end, can cover top valve stem passage mouth; The last conical surface contacting point of housing and valve rod is provided with step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220024292 CN202612661U (en) | 2012-01-19 | 2012-01-19 | Nodular cast iron air-conditioner stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220024292 CN202612661U (en) | 2012-01-19 | 2012-01-19 | Nodular cast iron air-conditioner stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202612661U true CN202612661U (en) | 2012-12-19 |
Family
ID=47346362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220024292 Expired - Fee Related CN202612661U (en) | 2012-01-19 | 2012-01-19 | Nodular cast iron air-conditioner stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202612661U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107002897A (en) * | 2014-12-16 | 2017-08-01 | 罗伯特·博世有限公司 | Pressure limiting valve |
| CN113404870A (en) * | 2021-06-16 | 2021-09-17 | 塔罗斯科技股份有限公司 | Filling tap |
-
2012
- 2012-01-19 CN CN 201220024292 patent/CN202612661U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107002897A (en) * | 2014-12-16 | 2017-08-01 | 罗伯特·博世有限公司 | Pressure limiting valve |
| CN107002897B (en) * | 2014-12-16 | 2021-08-03 | 罗伯特·博世有限公司 | Pressure limiting valve |
| CN113404870A (en) * | 2021-06-16 | 2021-09-17 | 塔罗斯科技股份有限公司 | Filling tap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20170119 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |