CN207464138U

CN207464138U - A kind of guide vanes of water turbine molding die

Info

Publication number: CN207464138U
Application number: CN201721239228.1U
Authority: CN
Inventors: 曹旦
Original assignee: NANTONG RONGHENG ENVIRONMENTAL PROTECTION EQUIPMENT CO Ltd
Current assignee: NANTONG RONGHENG ENVIRONMENTAL PROTECTION EQUIPMENT CO Ltd
Priority date: 2017-09-26
Filing date: 2017-09-26
Publication date: 2018-06-08
Anticipated expiration: 2027-09-26

Abstract

The utility model discloses a kind of guide vanes of water turbine molding dies, including shaping loop and base ring, shaping loop is fixedly connected by positioning pin with base ring, its circumferencial direction of shaping loop upper edge is uniformly distributed the location hole for being useful for positioning guide vane mould, guide vane mould is hollow structure, and matched one by one with guide vanes of water turbine, the top of guide vane mould is equipped with upper decorative cover, is bolted to connection between upper decorative cover, shaping loop and base ring.The forming die structure is simple, low manufacture cost, flexible and convenient operation, guide vane mould is positioned by replacing different shaping loops, the guide vane for outpouring different drift angle requirements can be poured after fixation successively, and pours into a mould precision height, greatly improves the efficiency of guide vane and spiral case, seat ring integrally casting.

Description

A kind of guide vanes of water turbine molding die

Technical field

The utility model belongs to hydraulic turbine casting technology field, and in particular to a kind of guide vanes of water turbine molding die.

Background technology

Spiral case especially largely applies to the Francis turbine spiral case of cooling tower energy regenerating, generally now Welding fabrication or the molding of direct steel cylinder segmented welding, the process route of the latter are after being cast using cast steel fragment：Steel cylinder segmentation weldering Spiral case is connected into, by guide vane, seat ring upper cover lower cover is welded into seat ring --->Spiral case carries out roughing, and seat ring carries out roughing, thick to add Spiral case is welded as a whole, while Weld-supporting foot again with having been subjected to a welding fabrication and primary rough machined seat ring after work, There are welding job amount is huge, stress concentration in welding process, the shortcomings such as the easy leak of weld seam.

The technique relies on a large amount of welding, and final finished is there are a large amount of internal stress, and guide vane angle is inconsistent, it is difficult to find and add Work benchmark, each batch hydraulic turbine consistency is poor, and performance is difficult to ensure that.

And the integral casting process used at present, although route reduces significantly, machining benchmark is also more stable, monoblock cast Mean to be difficult to be adjusted flexibly the angle of guide vane as welding, once operating mode changes, the guide vane of demand different angle, it is necessary to Open a set of different mold of system again together with seat ring, spiral case, input cost is quite big.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of simple in structure, flexible and convenient operation, costs of manufacture It is low, and the guide vanes of water turbine molding die of guide vane cast precision can be effectively improved.

In order to solve the above technical problems, the technical solution adopted in the utility model is：

A kind of guide vanes of water turbine molding die, including shaping loop and base ring, shaping loop is consolidated by positioning pin and base ring Fixed connection, its circumferencial direction of shaping loop upper edge are uniformly distributed the location hole for being useful for positioning guide vane mould, and guide vane mould is hollow structure, And matched one by one with guide vanes of water turbine, the top of guide vane mould is equipped with upper decorative cover, passes through spiral shell between upper decorative cover, shaping loop and base ring Bolt is fixedly connected.

The shaping loop is made of the cold-rolled steel sheet laser cutting of 3.5-4.5mm thickness.

The guide vane mould is made of steel casting.

The upper decorative cover, shaping loop are consistent with the internal-and external diameter of base ring.

The utility model has the advantages that：The forming die structure of the utility model is simple, low manufacture cost, operates flexibly side Just, guide vane mould is positioned by replacing different shaping loops, can be poured successively after fixed and outpour leading for different drift angle requirements Leaf, and precision height is poured into a mould, greatly improve the efficiency of guide vane and spiral case, seat ring integrally casting.

Description of the drawings

The utility model is described in further detail with reference to the accompanying drawings and detailed description.

Fig. 1 is the structure diagram of the utility model；

Fig. 2 is the configuration schematic diagram of the utility model.

Wherein, 1, base ring, 2, guide vane mould, 3, shaping loop, 31, location hole, 4, upper decorative cover.

Specific embodiment：

As depicted in figs. 1 and 2, a kind of guide vanes of water turbine molding die, including shaping loop 3 and base ring 1, shaping loop 3 is logical It crosses positioning pin to be fixedly connected with base ring 1, its circumferencial direction of 3 upper edge of shaping loop, which is uniformly distributed, is useful for determining for positioning guide vane mould 2 Position hole 31, guide vane mould 2 is hollow structure, and is matched one by one with guide vanes of water turbine, and the top of guide vane mould 2 is equipped with upper decorative cover 4, upper cover Pass through bolt between circle 4, shaping loop 3 and base ring 1（It is not drawn into）It is fixedly connected.

In the utility model, shaping loop 3 is made of the cold-rolled steel sheet laser cutting of 3.5-4.5mm thickness, according to different inclined The guide vane demand at angle makes multiple corresponding shaping loops 3；Guide vane mould 2 is made of steel casting, and two sides polishes, and is careful through wire cutting Silk is process, then hand polish, has many advantages, such as that dimensional accuracy is high, surface smoothness is good；Simultaneously, it is ensured that upper decorative cover 4, sizing Circle 3 is consistent with the internal-and external diameter of base ring 1.

During making, shaping loop 3 is fixed on by positioning pin on base ring 1；Guide vane mould 2 is located in again each on shaping loop 3 In a location hole 31, for the ease of distinguishing, it can be respectively provided with uniquely in shaping loop 3 and 1 corresponding position of base ring in each guide vane mould 2 Number；Then upper decorative cover 4 is placed on to the top of guide vane mould 2, will integrally be fixed by bolt.

In use, base ring 1 is horizontal positioned, the shaping loop 3 of corresponding guide vane drift angle positions thereon, then by shaping loop 3 Each guide vane mould 2 is placed sequentially in corresponding position by the number order of location hole 31, is subject to positioning and locking, is finally inserted precoated sand, Cover the fastening of 4 blending bolt of decorative cover, you can igniting burns out the sand mo(u)ld of sizing, and required drift angle is obtained with this sand mo(u)ld pouring molten steel Guide vanes of water turbine, flexible and convenient operation is of low cost, and pour into a mould precision it is also higher.

In addition, since spiral case, guide vane and seat ring integrally casting technique need to consume a large amount of molten steel, in order into one Step reduces cost, can be realized by recycling steel scrap, when smelting is first expired furnace bottom pad using a small amount of small-sized scrap, same after heating and melting Step heats remaining steel scrap and carburant, adds the pig iron that mass ratio is 10-20%, avoids graphite coarse in the pig iron The deformation water leakage situation of influence and traditional welding of the grain to casting compactness, and it is effectively utilized the various elements in steel scrap.

Claims

1. a kind of guide vanes of water turbine molding die, it is characterised in that：Including shaping loop and base ring, the shaping loop passes through positioning Pin is fixedly connected with base ring, and described its circumferencial direction of shaping loop upper edge is uniformly distributed the location hole for being useful for positioning guide vane mould, The guide vane mould is hollow structure, and is matched one by one with guide vanes of water turbine, and the top of the guide vane mould is equipped with upper decorative cover, it is described on It is bolted to connection between decorative cover, shaping loop and base ring.

2. guide vanes of water turbine molding die according to claim 1, it is characterised in that：The shaping loop is by 3.5-4.5mm Thick cold-rolled steel sheet laser cutting is made.

3. guide vanes of water turbine molding die according to claim 1, it is characterised in that：The guide vane mould is by steel casting system Into.

4. guide vanes of water turbine molding die according to claim 1, it is characterised in that：The upper decorative cover, shaping loop and bottom The internal-and external diameter of seat ring is consistent.