CN2755317Y - Cylinder of concrete conveyor pump - Google Patents
Cylinder of concrete conveyor pump Download PDFInfo
- Publication number
- CN2755317Y CN2755317Y CN 200420043706 CN200420043706U CN2755317Y CN 2755317 Y CN2755317 Y CN 2755317Y CN 200420043706 CN200420043706 CN 200420043706 CN 200420043706 U CN200420043706 U CN 200420043706U CN 2755317 Y CN2755317 Y CN 2755317Y
- Authority
- CN
- China
- Prior art keywords
- cylinder
- wear
- resistant alloy
- transmission
- concrete
- 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 - Fee Related
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- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model relates to a cylinder of a concrete conveying pump, which comprises a cylindrical metal basal body cast by 38CrMoAlalloy steel. The utility model is characterized in that the surface of the metal basal body is formed with a layer of hard nitride after nitrizing treatment under low temperature, and the hardness of the metal basal body can surpass 900HV. The cylinder of a concrete conveying pump reduces production cost by 30 percents compared with an original cylinder which comprises a wear-resistant alloy layer, and prolongs the service life by three times compared with the original cylinder which comprises the wear-resistant alloy layer.
Description
Technical field
The utility model relates to a kind of transfer pump that belongs to the construction machinery equipment field, relates in particular to a kind of cylinder barrel that is used for concrete pump.
Background technique
The transmission and concrete transmission pump cylinders is the key components and parts of concrete pump, because its frequent and concrete bump and friction, so very easily wearing and tearing, so the necessary rub resistance in its surface.Application number is that the patent documentation of 93225294.X discloses that a kind of wear-resisting property is good, the transmission and concrete transmission pump cylinders of long service life, this cylinder barrel comprises the cylindrical metal matrix, it is characterized in that it also comprises being compounded on the above-mentioned metallic matrix and with above-mentioned matrix all-in-one-piece hard, wear-resistant alloy-layer is set.Because the higher wear-resistant alloy layer of hardness is adopted on the inboard wall of cylinder liner surface, than initial rich chromium cast iron inboard wall of cylinder liner, its hardness is higher, and wear-resisting property is better.But the inventor finds in practice, in case wear-resistant alloy layer begins to be worn, even have only very trickle part slight crack to occur, also can cause the wear-resistant alloy layer of bulk to come off from metallic matrix.Its essential reason is can not compoundly fully be one between metallic matrix and the wear-resistant alloy layer, and their compound degree is subjected to the influence of material and technology.So, though there is lengthening in the above-mentioned life-span that contains the wear-resistant alloy layer cylinder barrel, change but needs are frequent, both increased cost of production, wasted great deal of steel again.
Summary of the invention
Based on this, the purpose of this utility model provides that a kind of hardness is bigger, the life-span is longer, the simpler transmission and concrete transmission pump cylinders of technology.
For this reason, the utility model is achieved in that a kind of transmission and concrete transmission pumping cylinder cylinder barrel, comprise the metallic matrix that cylindrical shape 38CrMoAl alloyed steel is cast, it is characterized in that described metallic matrix is through the low temperature nitriding treatment, form one deck hard nitride at metal base surface, its hardness can surpass 900HV.
Adopt the utility model transmission and concrete transmission pump cylinders, cost of production can reduce by 30% than the original wear-resistant alloy layer cylinder barrel that contains, and the life-span can increase by 3 times than the original wear-resistant alloy layer cylinder barrel that contains.
Description of drawings
Fig. 1 is a structural representation of the present utility model.1. metallic matrixes among the figure; 2. inner cavity of cylinder.
Embodiment
Shown in Figure 1, the utility model is a kind of transmission and concrete transmission pumping cylinder cylinder barrel, comprise metallic matrix (1) and inner cavity of cylinder (2) that cylindrical shape 38CrMoAl alloyed steel is cast, it is characterized in that described metallic matrix (1) is through the low temperature nitriding treatment, form one deck hard nitride on the surface of cylinder letter inner chamber (2), its hardness can surpass 900HV.
Claims (2)
1, a kind of transmission and concrete transmission pump cylinders comprises the cylindrical metal matrix, it is characterized in that described metal base surface has one deck hard nitride.
2, transmission and concrete transmission pump cylinders as claimed in claim 1 is characterized in that described metallic matrix is the 38CrMoAl alloyed steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420043706 CN2755317Y (en) | 2004-03-16 | 2004-03-16 | Cylinder of concrete conveyor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420043706 CN2755317Y (en) | 2004-03-16 | 2004-03-16 | Cylinder of concrete conveyor pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2755317Y true CN2755317Y (en) | 2006-02-01 |
Family
ID=35928945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420043706 Expired - Fee Related CN2755317Y (en) | 2004-03-16 | 2004-03-16 | Cylinder of concrete conveyor pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2755317Y (en) |
-
2004
- 2004-03-16 CN CN 200420043706 patent/CN2755317Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |