阅读说明：本技术 一种蒸汽轮机铸钢件模具及其操作方法 (Steel casting die of steam turbine and operation method thereof ) 是由 金刘建 许秋林 瞿忱 潘耀东 李奕澄 于 2021-07-30 设计创作，主要内容包括：本发明公开了一种蒸汽轮机铸钢件模具及其操作方法；通过设计了电机带动第一锥型齿轮转动,第一锥型齿轮旋转带动两侧第二锥型齿轮转动,从而使螺纹杆旋转带动螺纹块的水平移动,螺纹块带动夹板在工作台顶部位移,夹板带动弹性机构挤压第一模具盒与第二模具盒位移,对位机构确保第一模具盒与第二模具盒连接精确,打开防尘盖对内部浇筑钢液等待成型,进行冷却处理,反向转动电机,进行脱模；其能够对位精准、减少远离浪费和保证冷却的效率又要保证产品的质量,解决了模具对位的不精准度,进而降低了生产质量,同时钢液从间隙中溢出的情况发生,且过快的降温会使得铸钢件表面产生裂纹的问题。(The invention discloses a steam turbine steel casting die and an operation method thereof; the motor is designed to drive the first bevel gear to rotate, the first bevel gear rotates to drive the second bevel gears on two sides to rotate, so that the threaded rod rotates to drive the threaded block to horizontally move, the threaded block drives the clamping plate to move at the top of the workbench, the clamping plate drives the elastic mechanism to extrude the first mold box and the second mold box to move, the alignment mechanism ensures that the first mold box and the second mold box are accurately connected, the dustproof cover is opened to wait for forming of internal pouring molten steel, cooling treatment is carried out, the motor is reversely rotated to carry out demolding; it can counterpoint accurate, reduce and keep away from extravagant and guarantee the quality of product again of refrigerated efficiency, has solved the not precision that the mould counterpointed, and then has reduced production quality, and the condition that the molten steel spills over from the clearance simultaneously takes place, and too fast cooling can make the problem that steel casting surface produced crackle.)

1. The utility model provides a steam turbine steel casting mould, includes workstation (1), its characterized in that: the bottom of the inner wall of the workbench (1) is bolted with a motor (2), the output end of the motor (2) is bolted with a first bevel gear (3), two sides of the first bevel gear (3) are respectively engaged with a second bevel gear (4), one side of the second bevel gear (4) far away from the threaded rod (5) is bolted with a threaded rod (5), one end of the threaded rod (5) far away from the second bevel gear (4) is rotatably connected with two sides of the inner wall of the workbench (1), the surface of the threaded rod (5) is in threaded connection with a threaded plate (6), the top of the threaded plate (6) is in bolted with clamping plates (7), two sides adjacent to the clamping plates (7) are respectively in bolted with an elastic mechanism (8), two sides adjacent to the elastic mechanism (8) are in bolted with a first mold box (9) and a second mold box (10), cooling grooves (11) are respectively formed at the tops of the first mold box (9) and the second mold box (10), counterpoint mechanism (12) are all installed with the back in the front of first mould box (9) and second mould box (10), the top intercommunication of first mould box (9) has feeder hopper (13), the top of feeder hopper (13) articulates there is shield (14).

2. The steam turbine steel casting mold of claim 1, wherein: elastic mechanism (8) are including removing pipe (81), the one end sliding connection that splint (7) were kept away from in removal pipe (81) has flexible pipe (82), and removes to have support spring (83) between pipe (81) and the adjacent one side of first mould box (9) and second mould box (10), and support spring (83) activity cup joints the surface at flexible pipe (82).

3. The steam turbine steel casting mold of claim 1, wherein: the alignment mechanism (12) comprises an alignment ring (121), an alignment rod (122) is connected to the inside of the alignment ring (121) in a sliding mode, fixed blocks (123) are bolted to two ends of the alignment rod (122), and the bottom of each fixed block (123) is bolted to the top of the workbench (1).

4. The steam turbine steel casting mold of claim 1, wherein: the top and the bottom of the right side of the first mold box (9) are respectively bolted with a clamping block (15), the top and the bottom of the left side of the second mold box (10) are respectively provided with a clamping groove (16), and the clamping blocks (15) are slidably connected with the clamping grooves (16).

5. The steam turbine steel casting mold of claim 1, wherein: both sides of workstation (1) inner wall bottom all bolted connection stopper (17), and the inside of stopper (17) is connected with the surface rotation of threaded rod (5).

6. The steam turbine steel casting mold of claim 1, wherein: l-shaped rods (18) are installed on two sides of the bottom of the inner wall of the workbench (1), reinforcing plates (19) are bolted to the bottoms of the threaded plates (6), and the interiors of the reinforcing plates (19) are connected with the surfaces of the L-shaped rods (18) in a sliding mode.

7. A steam turbine steel casting mould operation method is characterized in that: the method comprises the following steps:

step 1: cleaning the inner walls of the first die box (9) and the second die box (10);

step 2: starting the motor (2), wherein the motor (2) drives the first bevel gear (3) to rotate;

and step 3: the first bevel gear (3) rotates to drive the second bevel gears (4) on two sides to rotate, so that the threaded rod (5) rotates to drive the threaded block to horizontally move, and the threaded block drives the clamping plate (7) to move at the top of the workbench (1);

and 4, step 4: the clamping plate (7) drives the elastic mechanism (8) to extrude the first die box (9) and the second die box (10) to move;

and 5: the alignment mechanism (12) ensures that the first mold box (9) and the second mold box (10) are accurately connected;

step 6: after the clamping block (15) is in butt joint with the clamping groove (16), opening the dust cover (14) to wait for forming of the internally poured molten steel;

and 7: cooling treatment is carried out;

and 8: and (5) reversely rotating the motor (2) to demould.

8. The steam turbine steel casting mold operating method according to claim 7, characterized in that: in the step 5, the first mold box (9) and the second mold box (10) drive the aligning ring (121) to horizontally slide on the surface of the aligning rod (122), so that the fitting degree between the first mold box (9) and the second mold box (10) can be enhanced.

9. The steam turbine steel casting mold operating method according to claim 7, characterized in that: in the step 7, the flow channel is filled with the cooled sandy soil, the heat of the mold is taken away through sandy soil flowing, after the sandy soil flows through a plurality of turns, the sandy soil is emptied and replaced by cold water to continue the turns, the sand flows for at least 20 turns, the heat is fully absorbed, and when the sandy soil flows, small holes are inserted in the surface of the sandy soil through tools, so that ventilation is facilitated, and the heat is dissipated more quickly.

10. The steam turbine steel casting mold operating method according to claim 7, characterized in that: in step 8, after the temperature of the replaced cold water does not rise any more, the cold water is slightly beaten to the mold, so that the steel casting is separated from the mold, the mold is cooled through sandy soil firstly, cracks of the steel casting caused by low temperature are prevented, the mold after primary cooling is cooled again through the cold water, whether the steel casting is cooled completely is judged through the thermometer, and the cooling efficiency and the yield of the steel casting are greatly guaranteed.

Technical Field

The invention relates to the technical field of steam turbines, in particular to a steel casting die of a steam turbine and an operation method thereof.

Background

A steam turbine is a machine that extracts kinetic energy of steam (formed by heating water) and converts the kinetic energy into kinetic energy for turbine rotation. Compared with the original single-stage reciprocating steam engine improved by james watt, the turbine steam engine greatly improves the thermal efficiency, is closer to the ideal reversible process in thermodynamics, can provide larger power, and almost completely replaces the reciprocating steam engine. The turbine steam engine is particularly suitable for thermal power generation and nuclear power generation, about 80% of electricity in the world is generated by the turbine steam engine, a cast steel part refers to a part made of cast steel, the cast steel part has the similar performance to cast iron, but has better strength than the cast iron, the cast steel part has the defects of air hole defect, inaccurate angle positioning and the like easily in the casting process, the phenomenon of casing fracture can occur in long-term use, and various molds and tools for obtaining required products by injection molding, blow molding, extrusion, die casting or forging molding, smelting, stamping and the like in industrial production.

According to the manufacturing method of the steel casting die disclosed by the invention patent 201310529515.6, the alignment accuracy of the die is not accurate, the die is easy to deviate, the production quality is further reduced, meanwhile, the situation that molten steel overflows from a gap occurs, raw materials are wasted, cracks are generated on the surface of the steel casting due to the too fast cooling, the yield is greatly reduced, and the steel casting with the cracks cannot be put into normal use.

Disclosure of Invention

The invention aims to provide a steam turbine steel casting die and an operation method thereof, and aims to solve the problems that the alignment inaccuracy of the die is high, the production quality is further reduced, and meanwhile, molten steel overflows from a gap, and raw materials are wasted.

In order to achieve the purpose, the invention provides the following technical scheme:

a steel casting die of a steam turbine comprises a workbench, a motor is bolted at the bottom of the inner wall of the workbench, a first bevel gear is bolted at the output end of the motor, second bevel gears are meshed with the two sides of the first bevel gear, a threaded rod is bolted at one side of the second bevel gear, which is far away from the threaded rod, one end of the threaded rod, which is far away from the second bevel gear, is rotatably connected with the two sides of the inner wall of the workbench, a threaded plate is connected with the surface of the threaded rod in a threaded manner, clamping plates are bolted at the top of the threaded plate, elastic mechanisms are bolted at the adjacent sides of the two clamping plates, a first die box and a second die box are bolted at the adjacent sides of the two elastic mechanisms, cooling grooves are formed at the tops of the first die box and the second die box, and aligning mechanisms are arranged on the front sides and the back sides of the first die box and the second die box, the top intercommunication of first mould box has the feeder hopper, the top of feeder hopper articulates there is the shield.

Preferably, the elastic mechanism comprises a moving pipe, one end of the moving pipe, which is far away from the clamping plate, is slidably connected with a telescopic pipe, a supporting spring is clamped between the moving pipe and one side, which is adjacent to the first mold box and the second mold box, and the supporting spring is movably sleeved on the surface of the telescopic pipe.

Preferably, the alignment mechanism comprises an alignment ring, an alignment rod is connected to the inside of the alignment ring in a sliding mode, fixed blocks are bolted to two ends of the alignment rod, and the bottom of each fixed block is bolted to the top of the workbench.

Preferably, the top and the bottom of the right side of the first mold box are bolted with clamping blocks, the top and the bottom of the left side of the second mold box are respectively provided with a clamping groove, and the clamping blocks are in sliding connection with the clamping grooves.

Preferably, both sides of the bottom of the inner wall of the workbench are bolted with limiting blocks, and the insides of the limiting blocks are rotatably connected with the surface of the threaded rod.

Preferably, L-shaped rods are installed on two sides of the bottom of the inner wall of the workbench, a reinforcing plate is bolted to the bottom of the threaded plate, and the inside of the reinforcing plate is connected with the surfaces of the L-shaped rods in a sliding mode.

A steam turbine steel casting mold operating method, comprising the steps of:

step 1: cleaning the inner walls of the first mold box and the second mold box;

step 2: starting a motor, wherein the motor drives a first bevel gear to rotate;

and step 3: the first bevel gear rotates to drive the second bevel gears on two sides to rotate, so that the threaded rod rotates to drive the threaded block to horizontally move, and the threaded block drives the clamping plate to move on the top of the workbench;

and 4, step 4: the clamping plate drives the elastic mechanism to extrude the first die box and the second die box to move;

and 5: the alignment mechanism ensures that the first mold box and the second mold box are accurately connected;

step 6: after the clamping block is in butt joint with the clamping groove, opening a dustproof cover to wait for forming of the internal pouring molten steel;

and 7: cooling treatment is carried out;

and 8: and (5) reversely rotating the motor to demould.

Preferably, in step 5, the first mold box and the second mold box movably slide on the surface of the alignment rod, so that the fit between the first mold box and the second mold box can be enhanced.

Preferably, in step 7, the flow channel is filled with cooled sandy soil, heat of the mold is taken away through sandy soil flow, after the flow passes through a plurality of rounds, the sandy soil is emptied and replaced by cold water to continue the plurality of rounds, at least 20 rounds of flow are performed, the heat is fully absorbed, and when the sandy soil flows, small holes are inserted in the surface of the sandy soil through tools, so that ventilation is facilitated, and the heat is dissipated more quickly.

Preferably, in the step 8, after the temperature of the replaced cold water does not rise any more, the die is slightly beaten to separate the steel casting from the die, the die is cooled through sandy soil firstly, cracks of the steel casting caused by low temperature are prevented, the die after primary cooling is cooled again through the cold water, whether the steel casting is cooled completely is judged through a thermometer, and the cooling efficiency and the yield of the steel casting are greatly guaranteed.

Compared with the prior art, the invention provides a steam turbine steel casting die and an operation method thereof, and the steam turbine steel casting die has the following beneficial effects:

drive first taper gear through having designed the motor and rotate, first taper gear is rotatory to drive both sides second taper gear and rotates, thereby make the rotatory horizontal migration who drives the screw thread piece of threaded rod, the screw thread piece drives splint and shifts at the workstation top, splint drive elastic mechanism and extrude first mould box and second mould box displacement, counterpoint mechanism ensures that first mould box and second mould box are connected accurately, open the shield and wait for the shaping to the internal molten steel of pouring, carry out cooling treatment, the reverse rotation motor, carry out the drawing of patterns, it can counterpoint accurately, reduce and keep away from extravagant and guarantee the quality of product again with the efficiency of guaranteeing the cooling, the imprecision of mould counterpoint has been solved, and then production quality has been reduced, the condition that the molten steel spilled over from the clearance simultaneously takes place, and too fast cooling can make the problem that cast steel spare surface produced the crackle.

Drawings

FIG. 1 is a perspective view of the inventive structure;

FIG. 2 is a perspective view of a first mold box and a second mold box according to the present invention;

FIG. 3 is a schematic front view of the inventive structure;

FIG. 4 is a cross-sectional view of the patented work table of the invention;

FIG. 5 is a cross-sectional view of a first mold box and a second mold box of the present invention;

fig. 6 is a perspective view of a partial structure of the present invention.

In the figure: 1. a work table; 2. a motor; 3. a first bevel gear; 4. a second bevel gear; 5. a threaded rod; 6. a thread plate; 7. a splint; 8. an elastic mechanism; 81. moving the tube; 82. a telescopic pipe; 83. a support spring; 9. a first mold box; 10. a second mold box; 11. a cooling tank; 12. an alignment mechanism; 121. a registration ring; 122. an alignment rod; 123. a fixed block; 13. a feed hopper; 14. a dust cover; 15. a clamping block; 16. a card slot; 17. a limiting block; 18. an L-shaped rod; 19. and a reinforcing plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, the present invention provides a technical solution: a steel casting mould of a steam turbine comprises a workbench 1, a motor 2 is bolted at the bottom of the inner wall of the workbench 1, a first bevel gear 3 is bolted at the output end of the motor 2, second bevel gears 4 are meshed at both sides of the first bevel gear 3, a threaded rod 5 is bolted at one side of each second bevel gear 4 far away from the threaded rod 5, one end of each threaded rod 5 far away from the second bevel gear 4 is rotatably connected at both sides of the inner wall of the workbench 1, a threaded plate 6 is connected with the surface of each threaded rod 5 in a threaded manner, clamping plates 7 are bolted at the tops of the threaded plates 6, elastic mechanisms 8 are bolted at one sides of the two clamping plates 7 adjacent to each other, a first mould box 9 and a second mould box 10 are bolted at one side of the two elastic mechanisms 8 adjacent to each other, cooling grooves 11 are respectively formed at the tops of the first mould box 9 and the second mould box 10, and aligning mechanisms 12 are respectively installed at the front and the back of the first mould box 9 and the second mould box 10, the top of the first die box 9 is communicated with a feed hopper 13, the top of the feed hopper 13 is hinged with a dustproof cover 14, and the motor 2 is designed to drive the first bevel gear 3 to rotate; the first bevel gear 3 rotates to drive the second bevel gears 4 on two sides to rotate, so that the threaded rod 5 rotates to drive the threaded block 6 to horizontally move, and the threaded block 6 drives the clamping plate 7 to move on the top of the workbench 1; the clamping plate 7 drives the elastic mechanism 8 to extrude the first die box 9 and the second die box 10 to move; the aligning mechanism 12 ensures that the first mould box 9 is accurately connected with the second mould box 10; opening the dustproof cover 14 to wait for forming of the internal pouring molten steel; cooling treatment is carried out; the reverse rotation motor 2 carries out the drawing of patterns, and it can be counterpointed accurately, reduce and keep away from extravagant and guarantee the quality that the product will be guaranteed again to refrigerated efficiency, has solved the not precision that the mould was counterpointed, and then has reduced production quality, and the condition that the molten steel spills over from the clearance simultaneously takes place, and too fast cooling can make the problem that the cast steel surface produced crackle.

Referring to fig. 1 and 3, in order to apply pressure to the first mold box 9 and the second mold box 10 to avoid damage caused by too large force and loose fitting caused by too small force, the elastic mechanism 8 includes a moving tube 81, one end of the moving tube 81 far from the clamping plate 7 is slidably connected to an extension tube 82, a supporting spring 83 is clamped between the moving tube 81 and one side of the first mold box 9 adjacent to the second mold box 10, and the supporting spring 83 is movably sleeved on the surface of the extension tube 82.

Referring to fig. 1, 2 and 3, in order to attach the first mold box 9 and the second mold box 10 more precisely, the alignment mechanism 12 includes an alignment ring 121, an alignment rod 122 is slidably connected inside the alignment ring 121, two ends of the alignment rod 122 are bolted with fixing blocks 123, and the bottom of the fixing block 123 is bolted on the top of the workbench 1.

Referring to fig. 2, in order to facilitate the connection between the first mold box 9 and the second mold box 10, the top and the bottom of the right side of the first mold box 9 are bolted with clamping blocks 15, the top and the bottom of the left side of the second mold box 10 are both provided with clamping grooves 16, and the clamping blocks 15 are slidably connected with the clamping grooves 16.

Referring to fig. 4, in order to support the threaded rod 5 and prolong the service life, two sides of the bottom of the inner wall of the workbench 1 are bolted with limiting blocks 17, and the inner parts of the limiting blocks 17 are rotatably connected with the surface of the threaded rod 5.

Referring to fig. 4, in order to enhance the stability of the screw plate 6 during movement, L-shaped rods 18 are installed on both sides of the bottom of the inner wall of the working platform 1, a reinforcing plate 19 is bolted to the bottom of the screw plate 6, and the inside of the reinforcing plate 19 is slidably connected to the surfaces of the L-shaped rods 18.

A steam turbine steel casting mold operating method, comprising the steps of:

step 1: cleaning the inner walls of the first mold box 9 and the second mold box 10;

step 2: starting the motor 2, wherein the motor 2 drives the first bevel gear 3 to rotate;

and step 3: the first bevel gear 3 rotates to drive the second bevel gears 4 on two sides to rotate, so that the threaded rod 5 rotates to drive the threaded block to horizontally move, and the threaded block drives the clamping plate 7 to move on the top of the workbench 1;

and 4, step 4: the clamping plate 7 drives the elastic mechanism 8 to extrude the first die box 9 and the second die box 10 to move;

and 5: the aligning mechanism 12 ensures that the first mould box 9 is accurately connected with the second mould box 10;

step 6: after the clamping block 15 is in butt joint with the clamping groove 16, opening the dustproof cover 14 to wait for forming of the internal pouring molten steel;

and 7: cooling treatment is carried out;

and 8: and (5) reversely rotating the motor 2 to demould.

Further, in step 5, the first mold box 9 and the second mold box 10 drive the aligning ring 121 to horizontally slide on the surface of the aligning rod 122, so that the attaching degree between the first mold box 9 and the second mold box 10 can be enhanced.

Further, in step 7, the runner is filled with cooled sandy soil, the heat of the mold is taken away through sandy soil flowing, after the sandy soil flows through a plurality of turns, the sandy soil is emptied and replaced by cold water to continue the turns, at least 20 turns flow, the heat is fully absorbed, and when the sandy soil flows, small holes are inserted in the sandy soil surface through tools, so that ventilation is facilitated, and the heat is dissipated more quickly.

Further, in step 8, after the cold water temperature under the replacement no longer rises, slightly hit the mould and hit, make steel casting and mould separation, dispel the heat to the mould through sand earlier, prevent that the low crack that leads to steel casting to appear of temperature, rethread subcooled water cools off the mould after the primary cooling once more, judges through the thermometer whether the steel casting cools off the completion, very big assurance cooling efficiency and the yield of steel casting.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.