CN115464099A - Sheet type multi-way valve casting process and equipment - Google Patents

Sheet type multi-way valve casting process and equipment Download PDF

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Publication number
CN115464099A
CN115464099A CN202211129088.8A CN202211129088A CN115464099A CN 115464099 A CN115464099 A CN 115464099A CN 202211129088 A CN202211129088 A CN 202211129088A CN 115464099 A CN115464099 A CN 115464099A
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less
casting
equal
temperature
cooling
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Inventor
郭政
李卫胜
郭卫
杨勇
许玉龙
张翠芳
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Qufu Zhengcheng Machinery Technology Co ltd
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Qufu Zhengcheng Machinery Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/28—Normalising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/001—Heat treatment of ferrous alloys containing Ni
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The invention relates to a casting process and equipment of a sheet type multi-way valve, and belongs to the field of valve body machining and manufacturing. Normalizing heat treatment: charging the casting processed by S4 at the temperature of less than 250 ℃, heating to 940-950 ℃ at the heating speed of less than or equal to 300 ℃ per hour, preserving heat for 2.5-3 hours, discharging and cooling to the temperature of less than or equal to 300 ℃; tempering treatment: and (3) heating the casting treated by the S5 to 640-700 ℃, preserving heat for 3.5-4h, discharging from the furnace, cooling to be less than or equal to 300 ℃, and naturally cooling to room temperature. The invention has the following beneficial effects: low production cost, short period, stable quality of produced casting products and high performance. Effectively absorb pouring smog and clear up the dust, do not have obvious excessive, promote workshop environmental quality. Can greatly improve the working conditions of workers and release the pollution of high-temperature radiation, noise and smoke dust.

Description

Casting process and equipment for plate type multi-way valve
Technical Field
The invention relates to a casting process and equipment for a sheet type multi-way valve, and belongs to the field of valve body machining and manufacturing.
Background
The plate type multiway valve is an open multiway valve, and is mainly used for agricultural machinery, building machinery, mining machinery and other mobile machinery. The split type multi-way valve is in modular design, and different modules can be matched according to requirements. At present, the casting process of the sheet type multi-way valve mainly adopts conventional casting, and the defects of complex process, low qualification rate and short service life of products are usually accompanied.
In addition, the smoke and dust released during the pouring of the full mold casting in the prior art does not have a good collection system, so that the workshop environment is poor, and the gas exhausted into the atmosphere does not reach the national standard.
Disclosure of Invention
According to the defects in the prior art, the technical problems to be solved by the invention are as follows: in order to solve one of the problems, a casting process and equipment for a plate type multi-way valve are provided.
The invention relates to a casting process of a plate type multi-way valve, which is characterized by comprising the following steps of,
s1, smelting: smelting steel into molten steel;
s2, preparing a die: manufacturing a valve body mold according to the drawing size requirement, and putting the valve body mold into a molding sand box to obtain a sand mold;
s3, pouring a valve body: pouring the molten steel in the S1 into the sand mold in the S2, wherein the pouring temperature is 1380-1400 ℃, the pouring time is 26-30S, after the pouring is finished, keeping the temperature and standing for 40-50min, cooling to 340-380 ℃, and taking out to obtain a casting;
s4, hot cutting of a riser: heating the casting in the S3 to 630-650 ℃, preserving heat for 7-8h, then cooling to 350-380 ℃, discharging from the furnace, and carrying out hot cutting of a riser, wherein the temperature of the casting is higher than 220 ℃ after the hot cutting of the riser is finished;
s5, normalizing heat treatment: charging the casting processed by S4 at the temperature of less than 250 ℃, heating to 940-950 ℃ at the heating speed of less than or equal to 300 ℃ per hour, preserving heat for 2.5-3 hours, discharging and cooling to the temperature of less than or equal to 300 ℃;
s6, tempering: heating the casting treated by the S5 to 640-700 ℃, preserving heat for 3.5-4h, discharging from the furnace, cooling to be less than or equal to 300 ℃, and naturally cooling to room temperature;
s7, surface treatment: and grinding and polishing the casting processed by the S6 to obtain a finished valve body casting.
Further, the steel comprises the following components (in percentage by mass): c:0.20-0.28%, si is less than or equal to 0.6%, mn:0.8-1%, P is less than or equal to 0.04%, S is less than or equal to 0.03%, cr is less than or equal to 0.4%, ni:0.35 to 0.4 percent of Mo, less than or equal to 0.15 percent of Cu, less than or equal to 0.3 percent of V, less than or equal to 0.03 percent of V, and the balance of Fe and inevitable impurity elements.
Further, the steel comprises the following components (in percentage by mass): c:0.28%, si:0.5%, mn:1%, P:0.04, S:0.02%, cr 0.35%, ni:0.35%, mo:0.15%, cu:0.3%, V:0.03%, the balance being Fe and unavoidable impurity elements.
The utility model provides a piece formula multiple unit valve casting production facility for foretell piece formula multiple unit valve casting process, its characterized in that: comprises a steel smelting device, and steel is smelted into molten steel by the steel smelting device.
The steel smelting device further comprises a smelting furnace, a dust removal gas collecting hood body covered above the smelting furnace, and a dust removal gas collecting pipeline communicated with the dust removal gas collecting hood body, wherein a tail gas treatment device is arranged at the tail end of the dust removal gas collecting pipeline, the tail gas treatment device comprises a primary dust removal component connected with the dust removal gas collecting pipeline and a secondary dust removal component connected with the primary dust removal component, a fan is arranged on a pipeline between the primary dust removal component and the secondary dust removal component, the fan conveys air in the primary dust removal component to the secondary dust removal component, the secondary dust removal component comprises a smoke dust treatment tower body with a cavity inside, a pipeline communicated with the primary dust removal component is arranged at the position close to the bottom of the smoke dust treatment tower body, an exhaust port is arranged at the top of the smoke dust treatment tower body, a demister, an upper packing layer and a middle layer are sequentially arranged in the smoke treatment tower body from top to bottom, gaps are respectively arranged among the demister, an upper spray pipe matched with the upper spray packing layer is arranged above the upper spray pipe, the middle spray packing layer and the middle spray pipe are respectively communicated with a lower spray liquid storage chamber, and a circulating pump is arranged in the spray liquid storage chamber, and a circulating pump is connected with the spray liquid storage chamber of the lower spray pipe.
Further, the dust removal gas collecting channel body includes the left part cover body and the right part cover body, the left part cover body and the right part cover body are half arc, the right-hand member of the left part cover body and the left end fixed connection of the right part cover body are in the same place, be provided with the blast pipe in the middle of the gas collecting channel body top.
Further, the dust removal gas collection pipeline comprises a heat-resistant stainless steel plate, a refractory fiber layer and an outer shell, wherein the heat-resistant stainless steel plate is arranged on the inner layer, and the refractory fiber layer is positioned between the heat-resistant stainless steel plate and the outer shell.
Further, the dust removal gas collection pipeline comprises a heat-resistant stainless steel plate, a refractory fiber layer and an outer shell, wherein the heat-resistant stainless steel plate is arranged on the inner layer, and the refractory fiber layer is positioned between the heat-resistant stainless steel plate and the outer shell.
Further, the refractory fiber layer is an aluminum silicate fiber felt or a ceramic fiber felt.
Further, the flow velocity of the flue gas at the gas outlet end of the dedusting gas collecting pipeline is 3.5-5.5m/s; the primary dust removal assembly is a cyclone dust collector.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to a casting process and equipment of a sheet type multi-way valve, which comprises the following steps of: charging the casting processed by S4 at the temperature of less than 250 ℃, heating to 940-950 ℃ at the heating speed of less than or equal to 300 ℃ per hour, preserving heat for 2.5-3 hours, discharging and cooling to the temperature of less than or equal to 300 ℃; tempering treatment: and (3) heating the casting treated by the S5 to 640-700 ℃, preserving heat for 3.5-4h, discharging from the furnace, cooling by water to be less than or equal to 300 ℃, and naturally cooling to room temperature, so that the production cost is low, the period is short, and the produced casting product has stable quality and high performance.
The invention relates to a sheet type multi-way valve casting process and equipment, wherein a steel smelting device comprises a smelting furnace, a dust and gas collecting hood body covering the smelting furnace, and a dust and gas collecting pipeline communicated with the dust and gas collecting hood body, a tail gas treatment device is arranged at the tail end of the dust and gas collecting pipeline, the tail gas treatment device comprises a primary dust removal component connected with the dust and gas collecting pipeline and a secondary dust removal component connected with the primary dust removal component, a fan is arranged on the pipeline between the primary dust removal component and the secondary dust removal component, pouring smoke and cleaning dust are effectively absorbed, no obvious overflow exists, and the environment quality of a workshop is improved. Can greatly improve the working conditions of workers and is free from high-temperature radiation, noise and smoke pollution.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or components are generally identified by like reference numerals. In the drawings, elements or components are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view of the dust-removing gas-collecting pipeline.
Wherein, in the figure: 1. smelting furnace 2, dust and gas collecting hood body 3, dust and gas collecting pipeline 4, tail gas treatment device 4.1, primary dust removal assembly 4.2, secondary dust removal assembly 4.3, smoke and dust treatment tower body 4.4, demister 4.5, upper packing layer 4.6, middle packing layer 4.7, upper spray pipe 4.8, lower spray pipe 4.9, circulating pump 4.10, liquid storage cavity 5 and fan.
Detailed Description
The invention is further described below with reference to examples:
the present invention is further illustrated by the following specific examples, which are not intended to limit the scope of the invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Example 1
The casting process of the plate type multi-way valve comprises the following steps,
s1, smelting: smelting steel into molten steel;
s2, preparing a die: manufacturing a valve body mold according to the drawing size requirement, and putting the valve body mold into a molding sand box to obtain a sand mold;
s3, pouring a valve body: pouring the molten steel in the S1 into a sand mold in the S2, wherein the pouring temperature is 1380-1400 ℃, the pouring time is 26-30S, after the pouring is finished, keeping the temperature and standing for 40-50min, cooling to 340-380 ℃, and taking out to obtain a casting;
s4, hot cutting of a riser: heating the casting in the S3 to 630-650 ℃, preserving heat for 7-8h, then cooling to 350-380 ℃, discharging from a furnace, and carrying out hot cutting on a riser, wherein the temperature of the casting is higher than 220 ℃ after the hot cutting on the riser is finished;
s5, normalizing heat treatment: charging the casting processed by S4 at the temperature of less than 250 ℃, heating to 940-950 ℃ at the heating speed of less than or equal to 300 ℃ per hour, preserving heat for 2.5-3 hours, discharging and cooling to the temperature of less than or equal to 300 ℃;
s6, tempering: heating the casting processed by the S5 to 640-700 ℃, preserving heat for 3.5-4h, discharging from the furnace, cooling to be less than or equal to 300 ℃, and naturally cooling to room temperature;
s7, surface treatment: and grinding and polishing the casting processed by the S6 to obtain a finished valve body casting.
Example 2
In the casting process of the plate-type multi-way valve, the steel comprises the following components (by mass): c:0.28%, si:0.5%, mn:1%, P:0.04, S:0.02%, cr 0.35%, ni:0.35%, mo:0.15%, cu:0.3%, V:0.03%, the balance being Fe and unavoidable impurity elements.
The invention relates to a casting process and equipment of a sheet type multi-way valve, which comprises the following steps of: charging the casting processed by S4 at the temperature of less than 250 ℃, heating to 940-950 ℃ at the heating speed of less than or equal to 300 ℃ per hour, preserving heat for 2.5-3 hours, discharging and cooling to the temperature of less than or equal to 300 ℃; tempering treatment: and (3) heating the casting treated by the S5 to 640-700 ℃, preserving heat for 3.5-4h, discharging from the furnace, cooling by water to be less than or equal to 300 ℃, and naturally cooling to room temperature, so that the production cost is low, the period is short, and the produced casting product has stable quality and high performance.
Example 3
Referring to fig. 1-2, the plate type multi-way valve casting production equipment is used for the plate type multi-way valve casting process, and is characterized in that: comprises a steel smelting device, and steel is smelted into molten steel by the steel smelting device.
Preferably, the steel smelting device comprises a smelting furnace 1, a dust and gas collecting hood body 2 covering the smelting furnace 1, and a dust and gas collecting pipeline 3 communicated with the dust and gas collecting hood body 2, the tail end of the dust and gas collecting pipeline 3 is provided with a tail gas treatment device 4, the tail gas treatment device 4 comprises a primary dust removal component 4.1 connected with the dust and gas collecting pipeline 3 and a secondary dust removal component 4.2 connected with the primary dust removal component 4.1, a fan 5 is arranged on a pipeline between the primary dust removal component 4.1 and the secondary dust removal component 4.2, the fan 5 conveys air in the primary dust removal component 4.1 to the secondary dust removal component 4.2, the secondary dust removal component 4.2 comprises a smoke and dust treatment tower body 4.3 with a cavity inside, the bottom of the smoke and dust treatment tower body 4.3 is provided with a pipeline communicated with the primary dust removal component 4.1, the top of the smoke and dust treatment tower body 4.3 is provided with an exhaust port, a demister 4.4, an upper packing layer 4.5 and a middle packing layer 4.6 are sequentially arranged in the smoke dust treatment tower body 4.3 from top to bottom, a reserved gap is formed among the demister 4.4, the upper packing layer 4.5 and the middle packing layer 4.6, an upper spraying pipe 4.7 matched with the upper packing layer 4.5 is arranged above the upper packing layer 4.5, a lower spraying pipe 4.8 matched with the middle packing layer 4.6 is arranged above the middle packing layer 4.6, the upper spraying pipe 4.7 and the lower spraying pipe 4.8 are respectively connected with the water inlet end of a circulating pump 4.9 through pipelines, the inner bottom of the smoke dust treatment tower body 4.3 is a liquid storage chamber, the water inlet pipe of the lower spraying pipe 4.8 is communicated with the liquid storage chamber, liquid in the liquid storage chamber is pumped into the upper spraying pipe 4.7 and the lower spraying pipe 4.8 through the circulating pump 4.9, and the treatment liquid discharged from the upper spraying pipe 4.7 and the lower spraying pipe 4.8 finally falls into the liquid storage chamber 10, a cycle is formed.
Further, dust removal gas collecting channel body 2 includes the left part cover body and the right part cover body, the left part cover body and the right part cover body are half arc, the right-hand member of the left part cover body and the left end fixed connection of the right part cover body are in the same place, be provided with the blast pipe in the middle of the gas collecting channel body top.
Further, the dust-removing gas-collecting pipeline 3 comprises a heat-resistant stainless steel plate, a fire-resistant fiber layer and an outer shell, the heat-resistant stainless steel plate is arranged on the inner layer, and the fire-resistant fiber layer is arranged between the heat-resistant stainless steel plate and the outer shell.
Further, the dust-removing gas-collecting pipeline 3 comprises a heat-resistant stainless steel plate, a fire-resistant fiber layer and an outer shell, the heat-resistant stainless steel plate is arranged on the inner layer, and the fire-resistant fiber layer is arranged between the heat-resistant stainless steel plate and the outer shell.
Further, the refractory fiber layer is an aluminum silicate fiber felt or a ceramic fiber felt.
Further, the flow velocity of the flue gas at the gas outlet end of the dust and gas collecting pipeline 3 is 5.5m/s; the primary dust removal assembly is a cyclone dust collector.
The flue gas that dust removal gas collecting channel body 2 gathered gets into tail gas processing apparatus 4 through dust removal gas collecting pipeline 3 and handles, effectively absorbs pouring smog and clearance dust, and it is excessive to have obvious, promotes workshop environmental quality. The primary dust removal assembly is a cyclone dust collector. The inlet tube of lower floor's spray pipe 4.8 communicates to depositing the liquid cavity, will deposit liquid in the liquid cavity and pump into upper spray pipe 4.7 and lower floor's spray pipe 4.8 in through circulating pump 4.9, and upper spray pipe 4.7 and lower floor's spray pipe 4.8 exhaust treatment fluid finally fall into and deposit liquid cavity 4.10, form the circulation, effectively absorb pouring smog and clear up the dust under with the packing layer mating reaction, have the gas vent through the top of smoke and dust treatment tower body 4.3 at last.
The invention relates to a sheet type multi-way valve casting process and equipment, wherein a steel smelting device comprises a smelting furnace, a dust and gas collecting hood body covering the smelting furnace, and a dust and gas collecting pipeline communicated with the dust and gas collecting hood body, a tail gas treatment device is arranged at the tail end of the dust and gas collecting pipeline, the tail gas treatment device comprises a primary dust removal component connected with the dust and gas collecting pipeline and a secondary dust removal component connected with the primary dust removal component, a fan is arranged on the pipeline between the primary dust removal component and the secondary dust removal component, pouring smoke and cleaning dust are effectively absorbed, no obvious overflow exists, and the environment quality of a workshop is improved. Can greatly improve the working conditions of workers and release the pollution of high-temperature radiation, noise and smoke dust.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. A casting process of a sheet type multi-way valve is characterized by comprising the following steps,
s1, smelting: smelting steel into molten steel;
s2, preparing a die: manufacturing a valve body mold according to the drawing size requirement, and putting the valve body mold into a molding sand box to obtain a sand mold;
s3, pouring a valve body: pouring the molten steel in the S1 into a sand mold in the S2, wherein the pouring temperature is 1380-1400 ℃, the pouring time is 26-30S, after the pouring is finished, keeping the temperature and standing for 40-50min, cooling to 340-380 ℃, and taking out to obtain a casting;
s4, hot cutting of a riser: heating the casting in the S3 to 630-650 ℃, preserving heat for 7-8h, then cooling to 350-380 ℃, discharging from the furnace, and carrying out hot cutting of a riser, wherein the temperature of the casting is higher than 220 ℃ after the hot cutting of the riser is finished;
s5, normalizing heat treatment: charging the casting processed by S4 at the temperature of less than 250 ℃, heating to 940-950 ℃ at the heating speed of less than or equal to 300 ℃ per hour, preserving heat for 2.5-3 hours, discharging and cooling to the temperature of less than or equal to 300 ℃;
s6, tempering: heating the casting processed by the S5 to 640-700 ℃, preserving heat for 3.5-4h, discharging from the furnace, cooling to be less than or equal to 300 ℃, and naturally cooling to room temperature;
s7, surface treatment: and grinding and polishing the casting processed by the S6 to obtain a finished valve body casting.
2. The chip type multi-way valve casting process according to claim 1, wherein: the steel comprises the following components (in percentage by mass): c:0.20-0.28%, si is less than or equal to 0.6%, mn:0.8-1%, P is less than or equal to 0.04%, S is less than or equal to 0.03%, cr is less than or equal to 0.4%, ni:0.35 to 0.4 percent of Mo, less than or equal to 0.15 percent of Cu, less than or equal to 0.3 percent of V, less than or equal to 0.03 percent of V, and the balance of Fe and inevitable impurity elements.
3. The chip type multi-way valve casting process according to claim 1, wherein: the steel comprises the following components (in percentage by mass): c:0.28%, si:0.5%, mn:1%, P:0.04, S:0.02%, cr 0.35%, ni:0.35%, mo:0.15%, cu:0.3%, V:0.03%, the balance being Fe and unavoidable impurity elements.
4. A chip multi-way valve casting production apparatus for the chip multi-way valve casting process according to any one of claims 1 to 3, characterized in that: comprises a steel smelting device, and the steel smelting device is used for smelting the steel into molten steel.
CN202211129088.8A 2022-09-16 2022-09-16 Sheet type multi-way valve casting process and equipment Pending CN115464099A (en)

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