CN118080840B - Casting device for turbine combined air valve shell steel casting - Google Patents
Casting device for turbine combined air valve shell steel casting Download PDFInfo
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- CN118080840B CN118080840B CN202410502480.5A CN202410502480A CN118080840B CN 118080840 B CN118080840 B CN 118080840B CN 202410502480 A CN202410502480 A CN 202410502480A CN 118080840 B CN118080840 B CN 118080840B
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- 238000005266 casting Methods 0.000 title claims abstract description 37
- 229910000831 Steel Inorganic materials 0.000 title claims description 17
- 239000010959 steel Substances 0.000 title claims description 17
- 239000007788 liquid Substances 0.000 claims abstract description 138
- 239000000706 filtrate Substances 0.000 claims abstract description 81
- 239000002184 metal Substances 0.000 claims abstract description 62
- 238000001914 filtration Methods 0.000 claims abstract description 35
- 239000000919 ceramic Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000009466 transformation Effects 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims description 44
- 238000007789 sealing Methods 0.000 claims description 40
- 238000000926 separation method Methods 0.000 claims description 31
- 230000000903 blocking effect Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 14
- 239000004576 sand Substances 0.000 abstract description 9
- 239000013049 sediment Substances 0.000 abstract description 6
- 229910001208 Crucible steel Inorganic materials 0.000 abstract description 2
- 239000000306 component Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003110 molding sand Substances 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Abstract
The invention relates to a casting device of a cast steel of a combined air valve shell of a steam turbine, in the actual implementation process, molten metal is required to be injected into a containing groove and the liquid level is higher than a first filtrate cavity, and when the molten metal enters the containing groove, the molten metal passes through a vertical groove section and fills a horizontal groove section; the sediment is sunk into the bottom of the accommodating groove, the scum floats on the top of the accommodating groove, at the moment, the pressure changing component forms negative pressure in the first filtrate cavity, the metal liquid is sucked from the middle of the accommodating groove, and the first filtering is carried out through the first microporous ceramic plate; then the transformation assembly enables the first filtrate cavity to form positive pressure, the second filtrate cavity forms negative pressure, and then metal liquid in the first filtrate cavity is sucked by the second filtrate cavity, is filtered through the second microporous ceramic plate for the second time, is discharged through the liquid discharge hole, and enters the sand mold.
Description
Technical Field
The invention relates to the technical field of steam turbine production, in particular to a casting device for a steam turbine combined air valve shell steel casting.
Background
The combined air valve of the steam turbine is one of core components of the steam turbine, and the shell steel casting is usually cast by sand mould due to larger size; one of the main reasons for producing rejects in large castings is inclusion defects, which can cause a number of quality, cost and efficiency problems in casting production.
Among them, sources of impurities in steel castings can be classified into three types: the first one is impurities existing in the molten metal, and the part of impurities can be divided into sediment with density larger than that of the molten metal and scum with density smaller than that of the molten metal; secondly, when molten metal is cast, the molten metal impacts the pouring gate to enable molding sand in the pouring gate to fall off, and the molding sand and the molten metal are mixed into a cavity together; thirdly, the molten metal reacts with air to be oxidized seriously in the process of pouring into the cavity, so that molten metal oxide is formed.
Disclosure of Invention
First, the technical problem to be solved
In order to solve the problems in the prior art, the invention provides a casting device for a turbine combined air valve shell steel casting, which can effectively avoid the generation of inclusion defects of the turbine combined air valve shell steel casting and improve the quality of the steel casting.
(II) technical scheme
In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps:
A casting device of a turbine combined air valve shell steel casting comprises a device main body; the device main body comprises a containing groove for containing molten metal; the accommodating groove comprises a vertical groove section and a horizontal groove section, wherein the vertical groove section is vertically arranged, and the horizontal groove section is connected to the bottom of the vertical groove section; the device main body also comprises a filtering mechanism connected above the transverse groove section; the filtering mechanism comprises a filtering cavity connected with the transverse groove section, a separation bottom plate transversely arranged between the filtering cavity and the transverse groove section and a separation middle plate transversely arranged in the filtering cavity; the filter cavity comprises a first filtrate cavity positioned below the separation middle plate, a second filtrate cavity positioned above the separation middle plate and a liquid discharge pipe connected above the second filtrate cavity; the separation bottom plate comprises a first liquid passing hole communicated between the first filtrate cavity and the transverse groove section; the separation middle plate comprises a second liquid passing hole communicated between the first filtrate cavity and the second filtrate cavity; the filtering mechanism further comprises a first microporous ceramic plate arranged in the first liquid passing hole, a first hole sealing assembly for movably sealing the first liquid passing hole and a first pressure changing assembly for adjusting the pressure of the first filtrate cavity; the filtering mechanism further comprises a second microporous ceramic plate arranged in the second liquid passing hole, a second hole sealing assembly for movably sealing the second liquid passing hole and a second pressure changing assembly for adjusting the pressure of the second filtrate cavity.
The first hole sealing assembly comprises a first sealing plate and a first torsion spring, wherein the first sealing plate is rotationally connected with the separation bottom plate, and the first torsion spring is connected between the first sealing plate and the separation bottom plate; the first plugging plate comprises a first end; the first end part is connected with the separation bottom plate through a first rotating shaft; the first voltage transformation assembly comprises a first sliding plate which is connected in the first filtrate cavity in a sealing sliding manner and a first rack which is connected with the first sliding plate.
The second hole sealing assembly comprises a second sealing plate and a second torsion spring, the second sealing plate is rotationally connected with the separation middle plate, and the second torsion spring is connected between the second sealing plate and the separation bottom plate; the second plugging plate comprises a second end; the second end part is connected with the separation middle plate through a second rotating shaft; the second voltage transformation assembly comprises a second sliding plate which is connected in the second filtrate cavity in a sealing sliding way and a second rack which is connected with the second sliding plate.
The filter mechanism further comprises a first cylinder for driving the first rack to move in a telescopic mode and a transmission gear connected between the first rack and the second rack.
The filtering mechanism further comprises a liquid return mechanism connected to the top of the first filtrate cavity; the liquid return mechanism is connected between the first filtrate cavity and the vertical groove section; the liquid return mechanism comprises a liquid guide pipe communicated with the first filtrate cavity, a liquid outlet pipe communicated with the vertical groove section and a connector connected between the liquid guide pipe and the liquid outlet pipe; the connector is movably communicated with the liquid guide tube and the liquid outlet tube.
The connector comprises a connecting pipe, a first limiting support fixedly arranged above the connecting pipe, a baffle plate inserted into the connecting pipe in a lifting and sliding manner and a reset spring for supporting the baffle plate to reset; the first limiting support comprises a first sliding groove extending along the vertical direction and a first top wall positioned at the top of the first sliding groove; the baffle plate comprises a first limiting clamping block sliding along the first sliding groove; the first limit clamping block is clamped between the first top wall and the connecting pipe; the reset spring is propped against between the first top wall and the first limit clamping block; the baffle plate also comprises a baffle section which is movably in and out of the connecting pipe; the blocking section is connected below the first limiting clamping block; the blocking section is provided with a liquid through hole.
The baffle plate also comprises an extending section extending out of the top wall from bottom to top; the extending section is connected above the first limiting clamping block; the baffle plate also comprises a propping section connected below the baffle section; the propping section extends out of the connecting pipe from top to bottom.
The filtering mechanism further comprises a triggering mechanism connected to the bottom of the first filtrate cavity; the trigger mechanism comprises a positioning pipe connected with the first filtrate cavity and a top contact assembly connected with the positioning pipe; the positioning pipe is provided with a guide groove communicated with the first filtrate cavity; the top contact assembly comprises a sliding block sliding along the guide groove and a supporting spring supported between the sliding block and the bottom of the guide groove; the trigger mechanism further comprises a second limit support fixedly connected above the positioning pipe and an ejector rod in sliding connection with the second limit support; the second limiting support comprises a second sliding groove extending along the vertical direction and a second top wall positioned at the top of the second sliding groove; the ejector rod comprises a second limiting clamping block which is in sealed sliding connection with the second chute and an ejector section which is connected with the second limiting clamping block; the ejection section can extend out of the second top wall to be abutted against the ejection section; the positioning pipe further comprises an air passing hole communicated between the guide groove and the second sliding groove and a limiting check ring fixedly arranged at the opening of the guide groove.
The device main body also comprises a liquid outlet head communicated with the liquid discharge pipe; the liquid outlet head comprises a connecting end used for being connected with the liquid discharge pipe and a liquid outlet end opposite to the connecting end; the liquid outlet head comprises an outer pipe in threaded connection with the liquid outlet pipe, an inner pipe sleeved in the outer pipe and a middle pipe connected between the outer pipe and the inner pipe;
The outer tube is matched with the middle tube; the outer tube is provided with a clamping step at the connecting end; the middle pipe is provided with a limit flange matched with the clamping step;
The middle pipe is matched with the inner pipe; the inner pipe comprises a large pipe section and a small pipe section connected with the large pipe section; the middle pipe is provided with a large hole section matched with the large pipe section, a small hole section matched with the small pipe section and a limiting step positioned between the large hole section and the small hole section; the liquid outlet head further comprises a propping spring propped between the limiting step and the large pipe section; the small pipe section is provided with an extension part capable of extending out of the small hole section and a liquid outlet hole arranged on the circumferential surface of the extension part;
The liquid outlet head further comprises a baffle plate in threaded connection with the extension part; the outer tube is provided with Rong Kongduan for accommodating a baffle;
The inner pipe also comprises a spiral raised line arranged on the large pipe section; the middle pipe also comprises a spiral groove which is arranged on the big hole section and matched with the spiral convex strip.
The accommodating groove is provided with an inner bottom surface and a collecting hole at the bottom of the inner bottom surface; the inner bottom surface is gradually inclined downwards from the edge to the middle of the accommodating groove; the device body also comprises a drain pipe connected with the collecting hole.
(III) beneficial effects
The beneficial effects of the invention are as follows: in the actual implementation process, the metal liquid is required to be injected into the accommodating groove and the liquid level is higher than the first filtrate cavity, and when the metal liquid enters the accommodating groove, the metal liquid passes through the vertical groove section and fills the horizontal groove section; the sediment is sunk into the bottom of the accommodating groove, the scum floats on the top of the accommodating groove, at the moment, the pressure changing component forms negative pressure in the first filtrate cavity, the metal liquid is sucked from the middle of the accommodating groove, and the first filtering is carried out through the first microporous ceramic plate; then the transformation assembly enables the first filtrate cavity to form positive pressure, the second filtrate cavity forms negative pressure, and then metal liquid in the first filtrate cavity is sucked by the second filtrate cavity, is filtered through the second microporous ceramic plate for the second time, is discharged through the liquid discharge hole, and enters the sand mold. Specifically, when the joint air valve of the casting steam turbine, a large amount of metal liquid needs to be injected into the sand mold cavity, so that the metal liquid needs to be continuously injected into the accommodating groove, a small amount of scum can be impacted by the metal liquid to enter the transverse groove section in the metal liquid injection process, the metal liquid can be effectively filtered through the filtration of the first microporous ceramic plate and the second microporous ceramic plate, and the metal liquid in the sand mold cavity is purified, so that the quality of a steel casting can be effectively improved.
Drawings
FIG. 1 is a schematic view of a casting apparatus according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a casting apparatus according to an embodiment of the present invention;
FIG. 3 is an enlarged view of area A of FIG. 2 in accordance with the present invention;
FIG. 4 is an enlarged view of region B of FIG. 2 in accordance with the present invention;
FIG. 5 is a schematic diagram illustrating a first state structure of a liquid outlet head according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a second state of a liquid outlet head according to an embodiment of the present invention;
FIG. 7 is a schematic view of the structure of an inner tube according to an embodiment of the present invention;
[ reference numerals description ]
Vertical tank section 11, horizontal tank section 12, filtration mechanism 2, filtration chamber 21, partition bottom plate 22, partition middle plate 23, first filtrate chamber 211, second filtrate chamber 212, drain 213, first microporous ceramic plate 241, first hole sealing assembly 242, first voltage transformation assembly 243, second microporous ceramic plate 251, second hole sealing assembly 252, second voltage transformation assembly 253, first sliding plate 2431, first rack 2432, second sliding plate 2531, second rack 2532, first cylinder 26, transmission gear 27, liquid return mechanism 3, drain 31, drain 32, connector 33, connecting tube 331, first spacing support 332, third spacing support baffle 333, return spring 334, first limit block 3331, liquid passage 3332, extension 3333, abutment 3334, trigger mechanism 4, positioning tube 41, slider 42, support spring 43, second limit support 44, ejector 45, second limit block 451, ejector 452, gas passage 411, limit retainer 412, liquid outlet 5, outer tube 51, inner tube 52, middle tube 53, clamping step 511, large tube 521, small tube 522, large hole 531, small hole 532, limit step 533, abutment spring 54, liquid outlet 5221, baffles 55, rong Kongduan, spiral ribs 523, inner bottom 13, and drain 6.
Detailed Description
The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.
Referring to fig. 1-7, a casting device for a turbine combined air valve shell steel casting of the present invention includes a device main body; the device main body comprises a containing groove for containing molten metal; the accommodating groove comprises a vertical groove section 11 which is vertically arranged and a horizontal groove section 12 which is connected to the bottom of the vertical groove section 11; the device main body also comprises a filtering mechanism 2 connected above the transverse groove section 12; the filtering mechanism 2 comprises a filtering cavity 21 connected with the transverse groove section 12, a separation bottom plate 22 transversely arranged between the filtering cavity 21 and the transverse groove section 12 and a separation middle plate 23 transversely arranged in the filtering cavity 21; the filter cavity 21 comprises a first filtrate cavity 211 below the separating middle plate 23, a second filtrate cavity 212 above the separating middle plate 23, and a drain pipe 213 connected above the second filtrate cavity 212; the separation bottom plate 22 comprises a first liquid passing hole communicated between the first filtrate cavity 211 and the transverse groove section 12; the separating middle plate 23 comprises a second liquid passing hole communicated between the first filtrate cavity 211 and the second filtrate cavity 212; the filtering mechanism 2 further comprises a first microporous ceramic plate 241 disposed in the first liquid passing hole, a first hole sealing component 242 movably sealing the first liquid passing hole, and a first pressure transforming component 243 adjusting the pressure of the first filtrate chamber 211; the filtering mechanism 2 further comprises a second microporous ceramic plate 251 disposed in the second liquid passing hole, a second sealing assembly 252 for movably sealing the second liquid passing hole, and a second pressure transforming assembly 253 for adjusting the pressure of the second filtrate chamber 212. In the actual implementation process, the metal liquid needs to be injected into the accommodating groove and the liquid level is higher than the first filtrate cavity 211, and when the metal liquid enters the accommodating groove, the metal liquid passes through the vertical groove section 11 and fills the horizontal groove section 12; the sediment will sink to the bottom of the containing groove, the scum will float to the top of the containing groove, at this time, the first transformation component 243 will make the first filtrate cavity 211 form negative pressure, the metal liquid is sucked from the middle of the containing groove, and the first filtration is carried out through the first microporous ceramic plate 241; then, the first voltage transformation assembly 243 makes the first filtrate chamber 211 form positive pressure, the second voltage transformation assembly 253 makes the second filtrate chamber 212 form negative pressure, so that the metal liquid in the first filtrate chamber 211 is sucked by the second filtrate chamber 212, filtered by the second microporous ceramic plate 251 for the second time, and discharged through the liquid discharge hole, and enters the sand mold. Specifically, when the joint air valve of the casting steam turbine, a large amount of metal liquid needs to be injected into the sand mold cavity, so that the metal liquid needs to be continuously injected into the accommodating groove, a small amount of scum is impacted by the metal liquid to enter the transverse groove section 12 in the metal liquid injection process, and the metal liquid can be effectively filtered through the filtering of the first microporous ceramic plate 241 and the second microporous ceramic plate 251, so that the metal liquid entering the sand mold cavity is purified, and the quality of a cast steel part can be effectively improved.
Preferably, the first sealing assembly 242 includes a first sealing plate rotatably connected to the partition base 22 and a first torsion spring connected between the first sealing plate and the partition base 22; the first plugging plate comprises a first end; the first end is connected with the separation bottom plate 22 through a first rotating shaft; the first transformer assembly 243 includes a first slide plate 2431 sealingly and slidably coupled within the first filtrate chamber 211 and a first rack 2432 coupled to the first slide plate 2431. In the actual implementation process, when the first rack 2432 drives the first sliding plate 2431 to move towards the direction away from the first plugging plate, the first filtrate chamber 211 forms negative pressure, the first plugging plate swings under the action of the negative pressure, so that the first liquid passing hole is opened, the first torsion spring holds the force, and the metal liquid is sucked into the first filtrate chamber 211 under the action of the negative pressure. When the first sliding plate 2431 stops moving or the first sliding plate 2431 moves towards the direction of the first plugging plate, the first torsion spring resets to drive the first plugging plate to reclose the first liquid through hole. Specifically, when the first slide plate 2431 moves toward the first stopper plate, positive pressure will be established in the first filtrate chamber 211.
Preferably, the second hole sealing assembly 252 comprises a second sealing plate rotatably connected with the separation middle plate 23 and a second torsion spring connected between the second sealing plate and the separation bottom plate 22; the second plugging plate comprises a second end; the second end part is connected with the separation middle plate 23 through a second rotating shaft; the second transformer 253 includes a second slide plate 2531 sealingly and slidably coupled to the second filtrate chamber 212 and a second rack 2532 coupled to the second slide plate 2531.
Preferably, the filtering mechanism 2 further comprises a first cylinder 26 driving the first rack 2432 to move telescopically and a transmission gear 27 connected between the first rack 2432 and the second rack 2532.
In the actual implementation process, when the first cylinder 26 drives the first rack 2432 to move, the transmission gear 27 is also rotated to enable the second rack 2532 to move reversely, so that when the first filtrate chamber 211 forms negative pressure, the second filtrate chamber 212 forms positive pressure; conversely, the first filtrate chamber 211 forms a positive pressure. When the volume of the molten metal discharged from the first filtrate chamber 211 is twice that of the molten metal discharged from the second filtrate chamber 212, the drain pipe 213 can be continuously drained.
Preferably, the filtering mechanism 2 further comprises a liquid return mechanism 3 connected to the top of the first filtrate chamber 211; the liquid return mechanism 3 is connected between the first filtrate cavity 211 and the vertical groove section 11; the liquid return mechanism 3 comprises a liquid guide tube 31 communicated with the first filtrate cavity 211, a liquid outlet tube 32 communicated with the vertical groove section 11 and a connector 33 connected between the liquid guide tube 31 and the liquid outlet tube 32; the connector 33 is movably connected with the liquid guiding tube 31 and the liquid outlet tube 32. In practical implementation, a small amount of fine dross is filtered by the first microporous ceramic plate 241 and then enters the first filtrate chamber 211 along with the molten metal, after the molten metal fills the first filtrate chamber 211, the dross floats on the top of the first filtrate chamber 211, the first sliding plate 2431 moves towards the first plugging plate to form positive pressure, so that the molten metal and the dross at the top of the first filtrate chamber 211 are pushed into the liquid guide tube 31, and then flow into the vertical groove section 11 again after passing through the connector 33 and the liquid outlet tube 32. The scum can be effectively discharged through the liquid return mechanism 3, and the molten metal is further purified.
Preferably, the connector 33 includes a connection tube 331, a first limiting support 332 fixedly disposed above the connection tube 331, a barrier 333 inserted into the connection tube 331 in a lifting and sliding manner, and a return spring 334 for supporting the barrier 333 to return; the first limiting support 332 includes a first chute extending in a vertical direction and a first top wall located at the top of the first chute; the baffle 333 includes a first limit block 3331 sliding along the first chute; the first limiting block 3331 is clamped between the first top wall and the connecting pipe 331; the return spring 334 abuts against between the first top wall and the first limiting fixture block 3331; the baffle 333 further comprises a baffle segment movable into and out of the connection tube 331; the blocking section is connected below the first limiting clamping block 3331; the barrier section has a fluid passage 3332.
Preferably, the baffle 333 further comprises a protruding section 3333 protruding from the top wall from bottom to top; the extending section 3333 is connected to the upper part of the first limit clamping block 3331; the baffle 333 further comprises an abutment section 3334 connected below the baffle section; the propping section 3334 extends out of the connecting tube 331 from top to bottom.
In the actual implementation process, when the connector 33 is in the first state, the blocking plate 333 blocks the connection pipe 331, and the liquid through hole 3332 is located below the connection pipe 331; when the connector 33 is in the second state, the liquid through hole 3332 is positioned in the connecting pipe 331, the restoring spring 334 compresses the stored force, and the connecting pipe 331 is opened to enable the molten metal to pass through; when the connector 33 is in the third state, the liquid passage 3332 is positioned above the connecting tube 331, the return spring 334 further compresses the stored force, and the connecting tube 331 is blocked again.
Preferably, the filtering mechanism 2 further comprises a triggering mechanism 4 connected to the bottom of the first filtrate chamber 211; the triggering mechanism 4 comprises a positioning pipe 41 connected with the first filtrate cavity 211 and a top contact assembly connected with the positioning pipe 41; the positioning pipe 41 is provided with a guide groove communicated with the first filtrate cavity 211; the top contact assembly comprises a sliding block 42 sliding along the guide groove and a supporting spring 43 supported between the sliding block 42 and the bottom of the guide groove; the triggering mechanism 4 further comprises a second limiting support 44 fixedly connected above the positioning tube 41 and an ejector rod 45 in sliding connection with the second limiting support 44; the second limiting support 44 comprises a second sliding groove extending along the vertical direction and a second top wall positioned at the top of the second sliding groove; the ejector rod 45 comprises a second limiting clamping block 451 which is in sealed sliding connection with the second chute and an ejector section 452 which is connected with the second limiting clamping block 451; the ejection segment 452 may extend beyond the second top wall to abut against the ejection segment 3334; the positioning tube 41 further comprises an air passing hole 411 communicated between the guide groove and the second sliding groove and a limiting retainer ring 412 fixedly arranged at the opening of the guide groove.
In the actual implementation process, when the first filtrate chamber 211 forms positive pressure, the molten metal moves toward the guide groove, the sliding block 42 is pushed to move, so that the supporting spring 43 compresses the accumulated force, the inert gas in the guide groove pushes the ejector rod 45 to eject upwards through the air passing hole 411, the baffle 333 is pushed to move upwards, and the liquid passing hole 3332 is gradually moved upwards below the connecting pipe 331 section when the baffle 333 moves upwards, and then enters the connecting pipe 331 and moves to the upper part of the connecting pipe 331. When entering the connecting pipe 331 through the liquid hole, the liquid return mechanism 3 can discharge the metal liquid containing the scum, and further purify the metal liquid.
Preferably, the device body further comprises a liquid outlet head 5 in communication with a liquid discharge tube 213; the liquid outlet head 5 comprises a connecting end used for being connected with the liquid outlet pipe 213 and a liquid outlet end opposite to the connecting end; the liquid outlet head 5 comprises an outer pipe 51 in threaded connection with the liquid outlet pipe 213, an inner pipe 52 sleeved in the outer pipe 51, and a middle pipe 53 connected between the outer pipe 51 and the inner pipe 52;
The outer tube 51 is matched with the middle tube 53; the outer tube 51 has a detent step 511 at the connection end; the middle pipe 53 is provided with a limit flange matched with the clamping step 511;
The middle pipe 53 is matched with the inner pipe 52; the inner tube 52 includes a large tube section 521 and a small tube section 522 connected to the large tube section 521; the middle pipe 53 is provided with a large hole section 531 matched with the large pipe section 521, a small hole section 532 matched with the small pipe section 522 and a limit step 533 between the large hole section 531 and the small hole section 532; the liquid outlet head 5 further comprises a propping spring 54 propped between the limit step 533 and the large pipe section 521; the small pipe section 522 is provided with a protruding part which can protrude out of the small hole section 532 and a liquid outlet hole 5221 arranged on the circumference surface of the protruding part;
the liquid outlet head 5 further comprises a baffle 55 in threaded connection with the extension part; the outer tube 51 has Rong Kongduan to receive the baffle 55;
In the actual implementation process, when the molten metal is poured, the liquid outlet head 5 can be stretched into the pouring channel, so that the oxidation reaction of the molten metal and air is effectively slowed down, and the formation of oxide of the molten metal is further avoided.
When the liquid outlet head 5 is in the initial state, the small hole section 532 can seal the liquid outlet hole 5221; when the molten metal in the liquid discharge pipe 213 enters the liquid outlet head 5, the small pipe section 522 stretches out of the small hole section 532 under the hydraulic action of the molten metal, the spring 54 is propped against the compression and accumulation force, and the liquid outlet hole 5221 enters the hole containing section 512; the molten metal is discharged along the liquid outlet hole 5221, and is flushed to the side wall of Rong Kongduan and the liquid outlet direction of the molten metal can be changed by the side wall of Rong Kongduan to buffer the molten metal, and then the molten metal moves towards the direction of the baffle plate 55, so that the molten metal is buffered again through the baffle plate 55, the molten metal can be effectively prevented from directly impacting the pouring gate and the cavity, and the casting sand is prevented from falling off.
The inner pipe 52 further comprises a spiral raised strip 523 disposed on the large pipe section 521; the middle pipe 53 further includes a spiral groove disposed on the macroporous section 531 and matched with the spiral convex strip 523.
In the actual implementation process, after the pouring of the molten metal is completed, the pushing spring 54 returns to push the small pipe section 522 to retract into the small hole section 532, and in the retraction process, the spiral raised strips 523 of the large pipe section 521 move along the spiral grooves to enable the inner pipe 52 to rotate while moving; one purpose is to avoid the inner tube 52 from retracting rapidly, so as to effectively drain the molten metal in the liquid outlet head 5; the second purpose is to rotate the baffle plate 55 so as to throw out the molten metal retained on the baffle plate 55.
Preferably, the accommodating groove is provided with an inner bottom surface 13 and a collecting hole at the bottom of the inner bottom surface 13; the inner bottom surface 13 is gradually inclined downwards from the edge to the middle of the accommodating groove; the device body further comprises a drain pipe 6 connected with the collecting hole.
In the practical implementation process, the sediment is deposited on the inner bottom surface 13 of the accommodating groove, and the sediment is collected to the collecting hole through the inclined inner bottom surface 13 and can be discharged outwards through the drain pipe 6.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.
Claims (6)
1. A casting device of a turbine combined air valve shell steel casting comprises a device main body; the method is characterized in that: the device main body comprises a containing groove for containing molten metal; the accommodating groove comprises a vertical groove section and a horizontal groove section, wherein the vertical groove section is vertically arranged, and the horizontal groove section is connected to the bottom of the vertical groove section; the device main body also comprises a filtering mechanism connected above the transverse groove section; the filtering mechanism comprises a filtering cavity connected with the transverse groove section, a separation bottom plate transversely arranged between the filtering cavity and the transverse groove section and a separation middle plate transversely arranged in the filtering cavity; the filter cavity comprises a first filtrate cavity positioned below the separation middle plate, a second filtrate cavity positioned above the separation middle plate and a liquid discharge pipe connected above the second filtrate cavity; the separation bottom plate comprises a first liquid passing hole communicated between the first filtrate cavity and the transverse groove section; the separation middle plate comprises a second liquid passing hole communicated between the first filtrate cavity and the second filtrate cavity; the filtering mechanism further comprises a first microporous ceramic plate arranged in the first liquid passing hole, a first hole sealing assembly for movably sealing the first liquid passing hole and a first pressure changing assembly for adjusting the pressure of the first filtrate cavity; the filtering mechanism further comprises a second microporous ceramic plate arranged in the second liquid passing hole, a second hole sealing assembly for movably sealing the second liquid passing hole and a second pressure changing assembly for adjusting the pressure of the second filtrate cavity; the first hole sealing assembly comprises a first sealing plate and a first torsion spring, wherein the first sealing plate is rotationally connected with the separation bottom plate, and the first torsion spring is connected between the first sealing plate and the separation bottom plate; the first plugging plate comprises a first end; the first end part is connected with the separation bottom plate through a first rotating shaft; the first voltage transformation assembly comprises a first sliding plate and a first rack, the first sliding plate is connected in the first filtrate cavity in a sealing sliding manner, and the first rack is connected with the first sliding plate; the second hole sealing assembly comprises a second sealing plate and a second torsion spring, the second sealing plate is rotationally connected with the separation middle plate, and the second torsion spring is connected between the second sealing plate and the separation bottom plate; the second plugging plate comprises a second end; the second end part is connected with the separation middle plate through a second rotating shaft; the second transformation assembly comprises a second sliding plate and a second rack, the second sliding plate is connected in the second filtrate cavity in a sealing sliding manner, and the second rack is connected with the second sliding plate; the filter mechanism further comprises a first cylinder for driving the first rack to move in a telescopic manner and a transmission gear connected between the first rack and the second rack; the filtering mechanism further comprises a liquid return mechanism connected to the top of the first filtrate cavity; the liquid return mechanism is connected between the first filtrate cavity and the vertical groove section; the liquid return mechanism comprises a liquid guide pipe communicated with the first filtrate cavity, a liquid outlet pipe communicated with the vertical groove section and a connector connected between the liquid guide pipe and the liquid outlet pipe; the connector is movably communicated with the liquid guide tube and the liquid outlet tube.
2. The casting apparatus for a turbine associated valve housing steel casting of claim 1, wherein: the connector comprises a connecting pipe, a first limiting support fixedly arranged above the connecting pipe, a baffle plate inserted into the connecting pipe in a lifting and sliding manner and a reset spring for supporting the baffle plate to reset; the first limiting support comprises a first sliding groove extending along the vertical direction and a first top wall positioned at the top of the first sliding groove; the baffle plate comprises a first limiting clamping block sliding along the first sliding groove; the first limit clamping block is clamped between the first top wall and the connecting pipe; the reset spring is propped against between the first top wall and the first limit clamping block; the baffle plate also comprises a baffle section which is movably in and out of the connecting pipe; the blocking section is connected below the first limiting clamping block; the blocking section is provided with a liquid through hole.
3. A casting apparatus for a turbine associated valve housing steel casting as claimed in claim 2 wherein: the baffle plate also comprises an extending section extending out of the top wall from bottom to top; the extending section is connected above the first limiting clamping block; the baffle plate also comprises a propping section connected below the baffle section; the propping section extends out of the connecting pipe from top to bottom.
4. A casting apparatus for a gas turbine associated valve housing steel casting as claimed in claim 3 wherein: the filtering mechanism further comprises a triggering mechanism connected to the bottom of the first filtrate cavity; the trigger mechanism comprises a positioning pipe connected with the first filtrate cavity and a top contact assembly connected with the positioning pipe; the positioning pipe is provided with a guide groove communicated with the first filtrate cavity; the top contact assembly comprises a sliding block sliding along the guide groove and a supporting spring supported between the sliding block and the bottom of the guide groove; the trigger mechanism further comprises a second limit support fixedly connected above the positioning pipe and an ejector rod in sliding connection with the second limit support; the second limiting support comprises a second sliding groove extending along the vertical direction and a second top wall positioned at the top of the second sliding groove; the ejector rod comprises a second limiting clamping block which is in sealed sliding connection with the second chute and an ejector section which is connected with the second limiting clamping block; the ejection section can extend out of the second top wall to be abutted against the ejection section; the positioning pipe further comprises an air passing hole communicated between the guide groove and the second sliding groove and a limiting check ring fixedly arranged at the opening of the guide groove.
5. The casting apparatus for a turbine associated valve housing steel casting of claim 1, wherein: the device main body also comprises a liquid outlet head communicated with the liquid discharge pipe; the liquid outlet head comprises a connecting end used for being connected with the liquid discharge pipe and a liquid outlet end opposite to the connecting end; the liquid outlet head comprises an outer pipe in threaded connection with the liquid outlet pipe, an inner pipe sleeved in the outer pipe and a middle pipe connected between the outer pipe and the inner pipe;
The outer tube is matched with the middle tube; the outer tube is provided with a clamping step at the connecting end; the middle pipe is provided with a limit flange matched with the clamping step;
The middle pipe is matched with the inner pipe; the inner pipe comprises a large pipe section and a small pipe section connected with the large pipe section; the middle pipe is provided with a large hole section matched with the large pipe section, a small hole section matched with the small pipe section and a limiting step positioned between the large hole section and the small hole section; the liquid outlet head further comprises a propping spring propped between the limiting step and the large pipe section; the small pipe section is provided with an extension part capable of extending out of the small hole section and a liquid outlet hole arranged on the circumferential surface of the extension part;
The liquid outlet head further comprises a baffle plate in threaded connection with the extension part; the outer tube is provided with Rong Kongduan for accommodating a baffle;
The inner pipe also comprises a spiral raised line arranged on the large pipe section; the middle pipe also comprises a spiral groove which is arranged on the big hole section and matched with the spiral convex strip.
6. The casting apparatus for a turbine associated valve housing steel casting of claim 1, wherein: the accommodating groove is provided with an inner bottom surface and a collecting hole at the bottom of the inner bottom surface; the inner bottom surface is gradually inclined downwards from the edge to the middle of the accommodating groove; the device body also comprises a drain pipe connected with the collecting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410502480.5A CN118080840B (en) | 2024-04-25 | Casting device for turbine combined air valve shell steel casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410502480.5A CN118080840B (en) | 2024-04-25 | Casting device for turbine combined air valve shell steel casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118080840A CN118080840A (en) | 2024-05-28 |
| CN118080840B true CN118080840B (en) | 2024-06-28 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010075951A (en) * | 2008-09-25 | 2010-04-08 | Toyota Motor Corp | Foreign matter removal device for molten metal |
| CN102220525A (en) * | 2011-07-29 | 2011-10-19 | 哈尔滨中飞新技术股份有限公司 | Aluminum alloy smelting-purifying device and smelting-purifying method |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010075951A (en) * | 2008-09-25 | 2010-04-08 | Toyota Motor Corp | Foreign matter removal device for molten metal |
| CN102220525A (en) * | 2011-07-29 | 2011-10-19 | 哈尔滨中飞新技术股份有限公司 | Aluminum alloy smelting-purifying device and smelting-purifying method |
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