CN102166621B - Method for casting valve body of heavy-calibre non-rising-stem flat valve - Google Patents

Method for casting valve body of heavy-calibre non-rising-stem flat valve Download PDF

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Publication number
CN102166621B
CN102166621B CN 201110088170 CN201110088170A CN102166621B CN 102166621 B CN102166621 B CN 102166621B CN 201110088170 CN201110088170 CN 201110088170 CN 201110088170 A CN201110088170 A CN 201110088170A CN 102166621 B CN102166621 B CN 102166621B
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China
Prior art keywords
valve body
valve
feeding
sand
thickness
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201110088170
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Chinese (zh)
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CN102166621A (en
Inventor
张辉
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Jiangsu Jinshi Casting & Forging Co Ltd
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Jiangsu Jinshi Casting & Forging Co Ltd
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Priority to CN 201110088170 priority Critical patent/CN102166621B/en
Publication of CN102166621A publication Critical patent/CN102166621A/en
Application granted granted Critical
Publication of CN102166621B publication Critical patent/CN102166621B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention discloses a method for casting a valve body of a heavy-calibre non-rising-stem flat valve. In the method, ester-cured water-glass sand is used for modeling to make a sand core, two RND 300 neck-down heating heat-insulation dead heads (1) are arranged at the valve belly part of the valve body of the sand core, six shaped chills (4) which are 90mm thick are arranged at the bottom of the valve belly part at a distance of 30mm, eight shaped chills (3) which are 70mm thick are arranged at an edge flange of the valve body, and a Phi 200*50mm shaped chill (2) is installed at the tail part of the valve body; the neck-down heating heat-insulation dead heads (1) perform feeding on the valve belly part of the valve body, the shaped chills (4) perform feeding on the bottom of the valve belly part, and the neck-down heating heat-insulation dead heads (1) at the valve belly part perform feeding on the shaped chills (3) of the edge flange of the valve body, and the shaped chill (2) performs feeding on the tail part of the valve body. In the invention, the neck-down heating heat-insulation dead heads are used for feeding, convenience is brought for gas cutting, the casting yield is increased, casting defects, such as sand inclusion, shrinkage porosity, cracks, sand blowholes, slag blowholes and the like, are avoided, and technical demands of customers are met.

Description

The valve body casting method of heavy caliber concealed pole plate valve
Technical field
The present invention relates to casting method, be specifically related to a kind of valve body casting method of heavy caliber concealed pole plate valve.
Background technology
The heavy caliber concealed pole plate valve is mainly used in the engineering aspects such as oil, natural gas well jaws equipment, throttle kill manifold and fluid control.Along with developing rapidly of oil, natural gas drilling and production technology, oil, the gas drilling degree of depth are in continuous increase; A large amount of discoveries of deep layer, super deep layer and the oil-gas reservoir of bad ground operating mode, for high performance concealed pole plate valve provides rare opportunity to develop, especially oil as the status of strategic materials more obviously and crude oil price occupy high today, the exploration of oil, natural gas and the increasing of drilling dynamics are being strengthened in countries in the world, and the heavy caliber concealed pole plate valve will have wide market prospects.Exploitation heavy caliber concealed pole plate valve, to the technical merit, the international competitiveness that strengthens product that promote China's oil and gas wellhead equipment, seize the international market, earning foreign exchange etc. for country all has good economy and social effect.
If process with the open die forging blank, then allowance is too large, and stock utilization is low, and product material cost, processing cost all can increase; If select the forging part blank to process, must change the stamp forging mould of forging equipment and purchasing price costliness, so both uneconomical, unrealistic again, determine to use at last the steel-casting blank.
But there are problems in heavy caliber concealed pole plate valve steel-casting: because the valve body wall thickness is large, the loam core is larger, form easily the casting flaws such as burning into sand, shrinkage porosite, shrinkage cavity, crackle, sand pore, cinder hole, make the valve body of heavy caliber concealed pole plate valve not reach required specification requirement.
Summary of the invention
The objective of the invention is: the valve body casting method that a kind of heavy caliber concealed pole plate valve is provided, adopt the valve body of this casting method casting flap type, avoid valve body the casting flaws such as burning into sand, shrinkage porosite, crackle, sand pore, cinder hole to occur, guarantee the valve body quality, satisfy client's specification requirement.
Technical solution of the present invention is: adopt the ester hardened sodium silicate sand molding and core making, it is characterized in that: two RND300 necking down heat preservation rising heads are installed at the valve body valve tripe position at core, 6 of the contoured chills of valve tripe bottom installation thickness 90 mm spacing 30mm, valve body limit flange is installed 8 of thickness 70mm contoured chills, Ф 25 mm ventholes are pricked at flange top, limit, and the valve body afterbody is installed Ф 200X50 mm contoured chill; Wherein, valve body valve tripe position is by two RND300 necking down heat preservation riser feedings, feeding is carried out by thickness 90 mm contoured chills in valve tripe bottom, the thickness 70mm contoured chill of valve body limit flange carries out feeding with equivalent wall thickness form by the necking down heat preservation rising head on the valve tripe, and the valve body afterbody is by the feeding of Ф 200X50 mm contoured chill.
Wherein, sprue is the earthenware of Ф 60 mm, and cross gate is the earthenware of Ф 50 mm, and ingate is the earthenware of Ф 50 mm.
Wherein, chromite sand, thickness 15-30mm are placed in the core surface; The 10-15mm chromite sand is placed at ingate mouth place; Typefounding, rising head root are placed the 10-15mm chromite sand; The valve body afterbody is placed the 15-20mm chromite sand.
The present invention has the following advantages:
1) all adopts necking down heat preservation rising head to replace the side riser feeding, make things convenient for gas cutting, improved the foundry goods yield rate; 2) utilize chromite sand thermal conductivity, characteristic that refractoriness is high, make core have good alkali resistance; 3) adopt ester Hardening Sodium Silicate molding and core making, avoid occurring the casting flaws such as burning into sand, shrinkage porosite, crackle, sand pore, cinder hole, satisfy client's specification requirement.
Description of drawings
Fig. 1 is the sand core structure sketch of casting method of the present invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is necking down heat preservation rising head sketch.
Among the figure: 1, RND300 necking down heat preservation rising head, 2, Ф 200X50 mm contoured chill, 3, thickness 70mm contoured chill, 4, thickness 90 mm contoured chills.
The specific embodiment
Further specify technical solution of the present invention below in conjunction with accompanying drawing.
Shown in Fig. 1-2, adopt the ester hardened sodium silicate sand molding and core making, it is characterized in that: two RND300 necking down heat preservation rising heads 1 are installed at the valve body valve tripe position at core, the contoured chill 4 of 6 thickness 90 mm spacing 30mm is installed in valve tripe bottom, valve body limit flange is installed 8 blocks of thickness 70mm contoured chills 3, Ф 25 mm ventholes are pricked at flange top, limit, and the valve body afterbody is installed Ф 200X50 mm contoured chill 2; Wherein, valve body valve tripe position is by 1 feeding of two RND300 necking down heat preservation rising heads, feeding is carried out by thickness 90 mm contoured chills 4 in valve tripe bottom, the thickness 70mm contoured chill 3 of valve body limit flange carries out feeding with equivalent wall thickness form by the necking down heat preservation rising head 1 on the valve tripe, and the valve body afterbody is by 2 feeding of Ф 200X50 mm contoured chill.
Wherein, sprue is the earthenware of Ф 60 mm, and cross gate is the earthenware of Ф 50 mm, and ingate is the earthenware of Ф 50 mm.
Wherein, chromite sand, thickness 15-30mm are placed in the core surface; The 10-15mm chromite sand is placed at ingate mouth place; Typefounding, rising head root are placed the 10-15mm chromite sand; The valve body afterbody is placed the 15-20mm chromite sand.

Claims (3)

1. the valve body casting method of heavy caliber concealed pole plate valve, adopt the ester hardened sodium silicate sand molding and core making, it is characterized in that: two RND300 necking down heat preservation rising heads (1) are installed at the valve body valve tripe position at core, the contoured chill (4) of 6 thickness 90 mm spacing 30mm is installed in valve tripe bottom, valve body limit flange is installed 8 blocks of thickness 70mm contoured chills (3), Ф 25 mm ventholes are pricked at flange top, limit, and the valve body afterbody is installed Ф 200X50 mm contoured chill (2); Wherein, valve body valve tripe position is by two RND300 necking down heat preservation rising heads (1) feeding, feeding is carried out by thickness 90 mm contoured chills (4) in valve tripe bottom, the thickness 70mm contoured chill (3) of valve body limit flange carries out feeding with equivalent wall thickness form by the necking down heat preservation rising head (1) on the valve tripe, and the valve body afterbody is by Ф 200X50 mm contoured chill (2) feeding.
2. the valve body casting method of heavy caliber concealed pole plate valve according to claim 1, it is characterized in that: wherein, sprue is the earthenware of Ф 60 mm, and cross gate is the earthenware of Ф 50 mm, and ingate is the earthenware of Ф 50 mm.
3. the valve body casting method of heavy caliber concealed pole plate valve according to claim 1 is characterized in that: wherein, chromite sand, thickness 15-30mm are placed in the core surface; The 10-15mm chromite sand is placed at ingate mouth place; Typefounding, rising head root are placed the 10-15mm chromite sand; The valve body afterbody is placed the 15-20mm chromite sand.
CN 201110088170 2011-04-09 2011-04-09 Method for casting valve body of heavy-calibre non-rising-stem flat valve Expired - Fee Related CN102166621B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201110088170 CN102166621B (en) 2011-04-09 2011-04-09 Method for casting valve body of heavy-calibre non-rising-stem flat valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201110088170 CN102166621B (en) 2011-04-09 2011-04-09 Method for casting valve body of heavy-calibre non-rising-stem flat valve

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CN102166621A CN102166621A (en) 2011-08-31
CN102166621B true CN102166621B (en) 2013-04-24

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104117635A (en) * 2014-07-03 2014-10-29 浙江汉声精密机械有限公司 Improved rotor sand mold
CN104190874B (en) * 2014-07-28 2016-05-25 兰州兰石集团有限公司 Super-low sulfur phosphorus HTHP valve body cast shaping process
CN104226915B (en) * 2014-09-26 2017-01-25 衡阳中钢衡重铸锻有限公司 Casting method of hollow shaft and casting mold
CN104776259A (en) * 2015-04-21 2015-07-15 南通华东油压科技有限公司 Electrohydraulic valve body casting
CN105964910B (en) * 2016-06-17 2019-11-01 广东省材料与加工研究所 A kind of rod-shaped or column crystal rich chromium cast iron preparation method
CN109261902A (en) * 2018-09-07 2019-01-25 江苏金石铸锻有限公司 The casting method of heavy caliber high pressure flap type
CN110328338A (en) * 2019-08-22 2019-10-15 盐城奥通特思克铸业有限公司 A kind of pouring procedure of flap type
CN111412299A (en) * 2020-04-03 2020-07-14 阳泉阀门股份有限公司 Low-pressure large-caliber thin-wall cast steel gate valve and casting method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1248943A (en) * 1967-10-26 1971-10-06 Wyman Curtis Lane Pressure feeding of castings
EP0603079A1 (en) * 1992-12-18 1994-06-22 Riken-Chuzo Corporation A method for manufacturing a hollow camshaft having oil-feeding holes on its chilled face
CN101422815A (en) * 2007-11-02 2009-05-06 曾奇中 New casting method and casting die
CN101695740A (en) * 2009-11-13 2010-04-21 南通华东油压科技有限公司 Sand mold for breaking hammer control valve body
CN101920315A (en) * 2010-09-07 2010-12-22 江苏金石铸锻有限公司 Casting method of ZG1Cr13 of PFFAP35/52 valve body

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1248943A (en) * 1967-10-26 1971-10-06 Wyman Curtis Lane Pressure feeding of castings
EP0603079A1 (en) * 1992-12-18 1994-06-22 Riken-Chuzo Corporation A method for manufacturing a hollow camshaft having oil-feeding holes on its chilled face
CN101422815A (en) * 2007-11-02 2009-05-06 曾奇中 New casting method and casting die
CN101695740A (en) * 2009-11-13 2010-04-21 南通华东油压科技有限公司 Sand mold for breaking hammer control valve body
CN101920315A (en) * 2010-09-07 2010-12-22 江苏金石铸锻有限公司 Casting method of ZG1Cr13 of PFFAP35/52 valve body

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