CN103537872A - Corrosion resistance technology for internal surface of large-diameter ball valve body - Google Patents
Corrosion resistance technology for internal surface of large-diameter ball valve body Download PDFInfo
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- CN103537872A CN103537872A CN201310446570.9A CN201310446570A CN103537872A CN 103537872 A CN103537872 A CN 103537872A CN 201310446570 A CN201310446570 A CN 201310446570A CN 103537872 A CN103537872 A CN 103537872A
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- stainless steel
- valve body
- 1cr18ni9ti
- steel coil
- hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
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Abstract
The invention relates to a corrosion resistance technology for the internal surface of a large-diameter ball valve body. The technology includes the following steps that first, an inner hole which needs to be lined with a 1Cr18Ni9Ti stainless steel ring of the valve body is turned to a needed size, and the thickness of the stainless steel ring is reserved; second, the 1Cr18Ni9Ti stainless steel ring is prefabricated, the machined stainless steel ring is cut off in the circumferential direction to form steel strips, and a group of through holes are manufactured evenly in the width direction of each stainless steel strip; third, each manufactured stainless steel strip is welded to the corresponding portion of the valve body through a welding rod till the whole matching face is welded completely to form a complete 1Cr18Ni9Ti stainless steel matching face; fourth, the inner hole of the valve body after being welded is fine turned till the size of the inner hole meets drawing requirements. The corrosion resistance technology for the internal surface of the large-diameter ball valve body is reasonable in design and easy to achieve. On the premise that the original using performance is guaranteed, machining cost and material cost are greatly reduced, and working efficiency and first pass yield are improved.
Description
Technical field
The present invention relates to ball valve technical field, especially a kind of big-diameter ball valve valve interior surface anticorrosion process that relates generally to the position contacting with seal ring on the position that contacts with seal ring on main valve body, auxiliary valve body.
Background technology
In order to improve corrosion resistance and the wearability ，Wo company of mating surface, adopt in its surface overlaying stainless steel 1Cr18Ni9Ti, the method on postwelding finish turning surface.Main valve body with ZGQ47H100/1100 ball valve is processed as example.First main valve body is needed built-up welding in hole dimension car to one side reserve 3 millimeters of built-up welding amounts, subsequent processing starts built-up welding 1Cr18Ni9Ti, requires overlay cladding to be not less than 5 millimeters thick, for next step finish turning operation reserves allowance.After completing, built-up welding operation need hole dimension in finish turning to reach drawing requirement.Adopt and also have in this way its weak point, because main valve body volume is larger, out-of-shape.When built-up welding, cannot realize automatic surfacing with automatic welder(welding machine), can only take the manually operated alternative of manual electric arc welding to take vertical position welding mode to weld.In order to reach overlay cladding thickness requirement, welder need to be long-pending with stainless steel electrode hole circle anchor ring in valve body on built-up welding at least two-layer, the working hour expense and the fee of material that on this procedure of built-up welding, spend are quite high.Due to large, the consuming time length of built-up welding area, affected by manual electric arc welding operator welding stability again, when finish turning overlaying surface, often find that overlay cladding produces the weld defects such as pore and crackle.Repair welding again and then finish turning need to stop after discovery defect.The phenomenon of so repeatedly repairing often occurs, and greatly reduces production efficiency.Although can guarantee the serviceability of ball valve, material cost and processing cost are but very large, have so just increased the production cost of product.
Summary of the invention
The object of the present invention is to provide a kind of can cutting down finished cost and material cost raise the efficiency the big-diameter ball valve valve interior surface anticorrosion process with first-time qualification rate.
The object of the invention is to realize by following technological means:
A valve interior surface anticorrosion process, is characterized in that: comprise the following steps:
. by valve body need liner 1Cr18Ni9Ti stainless steel coil in hole car to required size, reserved stainless steel coil thickness;
(2). prefabricated 1Cr18Ni9Ti stainless steel coil, the stainless steel coil after processing is along the circumferential direction blocked to formation steel band, make one group of through hole each section of stainless steel band width is uniform;
(3). each section of stainless steel band of making is welded in to the corresponding position of valve body with welding rod, until whole mating surface is soldered and is shaped to a complete 1Cr18Ni9Ti stainless steel mating surface;
. by welding after valve body in hole dimension finish turning to reaching drawing requirement.
And, step (1) described valve body need inner liner stainless steel circle in hole comprise the position contacting with seal ring on the position that contacts with seal ring on main valve body, auxiliary valve body.
And step (2) described detailed process is: first prefabricated stainless steel coil, adopt 8-12 millimeter 1Cr18Ni9Ti corrosion resistant plate to roll, according to process, determine the size of stainless steel coil external diameter and width, carry out necessary heat treatment and eliminate its stress; Then stainless steel coil external diameter is worked into required process, the stainless steel coil after processing is along the circumferential direction blocked and forms the steel band with certain arc length, make one group of through hole each section of stainless steel band width is uniform.
And, step (3) described detailed process is: with 1Cr18Ni9Ti welding rod, take the manually operated alternative of manual electric arc welding to be welded in the corresponding position of valve body each section of stainless steel band of making, at the position of making through hole, also to burn-on, until whole mating surface is soldered whole.
Advantage of the present invention and good effect are:
1, this technique is that traditional whole built-up welding 1Cr18Ni9Ti mating surface is changed to liner 1Cr18Ni9Ti stainless steel coil method, the stainless steel coil being about to after processing along the circumferential direction blocks formation steel band, and this stainless steel band is welded to valve interior surface with 1Cr18Ni9Ti welding rod, make it form complete 1Cr18Ni9Ti stainless steel mating surface, pass through again this mating surface of finish turning, can guarantee the serviceability of ball valve.This process is simply easy to realize, and can significantly increase work efficiency, reduce material consumption after use.
2, after adopting this technique, can reduce the number of times of doing over again, therefore not only can improve working (machining) efficiency, and can also improve first-time qualification rate, products quality guarantee.
3, the present invention be a kind of reasonable in design, be easy to the big-diameter ball valve valve interior surface anticorrosion process realized, technique of the present invention is guaranteeing under original serviceability prerequisite, greatly reduce processing cost and material cost, and improved operating efficiency and first-time qualification rate.
Accompanying drawing explanation
Fig. 1 is the 1Cr18Ni9Ti stainless steel band schematic diagram that needs liner;
Fig. 2 is the partial schematic diagram that adopts the valve body of the inventive method processing.
The specific embodiment
Below in conjunction with accompanying drawing, describe embodiments of the invention in detail; It should be noted that, the present embodiment is narrative, is not determinate, can not limit protection scope of the present invention with this.
A valve interior surface anticorrosion process, comprises the following steps:
. by valve body 3 need liner 1Cr18Ni9Ti stainless steel coil in hole car to required size, reserved stainless steel coil thickness, the position that need to carry out anticorrosion antiwear processing mainly comprises the position contacting with seal ring on the position that contacts with seal ring on main valve body, auxiliary valve body;
(2). first prefabricated stainless steel coil, adopt the 1Cr18Ni9Ti corrosion resistant plate of 8-12 millimeter to roll, according to process, determine the size of stainless steel coil external diameter and width, carry out necessary heat treatment and eliminate its stress; Then stainless steel coil external diameter is worked into required process, the stainless steel coil after processing is along the circumferential direction blocked and forms the steel band 1 with certain arc length, make one group of through hole 2 each section of stainless steel band width is uniform;
(3). with 1Cr18Ni9Ti welding rod, take the manually operated alternative of manual electric arc welding to be welded in the corresponding position of valve body each section of stainless steel band of making, at the position of making through hole, also to burn-on, until whole mating surface is soldered and is shaped to a complete 1Cr18Ni9Ti stainless steel mating surface;
. by welding after valve body in hole dimension finish turning to reaching drawing requirement.
Main valve body with ZGQ47H100/1100 ball valve is processed as example below, and this technological process is described:
. by main valve body need liner 1Cr18Ni9Ti stainless steel coil in hole dimension car to 1246 millimeters of 1346 millimeters of φ and φ, one side reserves 8 millimeters of stainless steel coil thickness.
(2). prefabricated stainless steel coil, with the 1Cr18Ni9Ti corrosion resistant plate of 12 millimeters, roll, according to process, be defined as stainless steel coil external diameter x width dimensions and be respectively φ 1350x165 and φ 1250x90, carry out necessary heat treatment and eliminate its stress, then stainless steel coil external diameter is worked into 1246 millimeters of 1346 millimeters of process φ and φ, stainless steel coil after processing is along the circumferential direction blocked to formation steel band, making its arc length is 400-500 millimeter, at each section of stainless steel band width, every Y=30 millimeter, beat through hole 4-5 (spacing is that X is about 100-150 millimeter) of φ 10 millimeter.
(3). with 1Cr18Ni9Ti welding rod, take the manually operated alternative of manual electric arc welding to be welded in the corresponding position of valve body each section of stainless steel band of making, at the position of beating 10 millimeters of holes of φ, also to burn-on, until whole mating surface is soldered whole, notice that weld seam wants through welding, weldering full.
(4). finally by drawing, hole finish turning in it is reached to drawing requirement to 1330 millimeters of φ and φ 1230 mm sizes, complete whole work flow.
Claims (4)
1. a big-diameter ball valve valve interior surface anticorrosion process, is characterized in that: comprise the following steps:
. by valve body need liner 1Cr18Ni9Ti stainless steel coil in hole car to required size, reserved stainless steel coil thickness;
(2). prefabricated 1Cr18Ni9Ti stainless steel coil, the stainless steel coil after processing is along the circumferential direction blocked to formation steel band, make one group of through hole each section of stainless steel band width is uniform;
(3). each section of stainless steel band of making is welded in to the corresponding position of valve body with welding rod, until whole mating surface is soldered and is shaped to a complete 1Cr18Ni9Ti stainless steel mating surface;
. by welding after valve body in hole dimension finish turning to reaching drawing requirement.
2. a kind of big-diameter ball valve valve interior surface anticorrosion process according to claim 1, is characterized in that: step (1) described valve body need inner liner stainless steel circle in hole comprise the position contacting with seal ring on the position that contacts with seal ring on main valve body, auxiliary valve body.
3. a kind of big-diameter ball valve valve interior surface anticorrosion process according to claim 1, it is characterized in that: step (2) described detailed process is: first prefabricated stainless steel coil, adopt 8-12 millimeter 1Cr18Ni9Ti corrosion resistant plate to roll, according to process, determine the size of stainless steel coil external diameter and width, carry out necessary heat treatment and eliminate its stress; Then stainless steel coil external diameter is worked into required process, the stainless steel coil after processing is along the circumferential direction blocked and forms the steel band with certain arc length, make one group of through hole each section of stainless steel band width is uniform.
4. a kind of big-diameter ball valve valve interior surface anticorrosion process according to claim 1, it is characterized in that: step (3) described detailed process is: with 1Cr18Ni9Ti welding rod, take the manually operated alternative of manual electric arc welding to be welded in the corresponding position of valve body each section of stainless steel band of making, at the position of making through hole, also to burn-on, until whole mating surface is soldered whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310446570.9A CN103537872B (en) | 2013-09-26 | 2013-09-26 | A kind of Corrosion resistance technology for internal surface of large-diameter ball valve body |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310446570.9A CN103537872B (en) | 2013-09-26 | 2013-09-26 | A kind of Corrosion resistance technology for internal surface of large-diameter ball valve body |
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| CN103537872A true CN103537872A (en) | 2014-01-29 |
| CN103537872B CN103537872B (en) | 2015-09-23 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58206326A (en) * | 1982-05-27 | 1983-12-01 | Akebono Brake Ind Co Ltd | Piston manufacturing method |
| CN101338832A (en) * | 2008-08-15 | 2009-01-07 | 江苏金石油气井口科技有限公司 | Static pressure mosaic valve body anti-corrosive device |
| CN102650344A (en) * | 2012-04-19 | 2012-08-29 | 吴忠仪表有限责任公司 | Corrosion-resistant, wear-resistant camflex valve |
| CN203162202U (en) * | 2013-03-21 | 2013-08-28 | 温州昌一阀门有限公司 | Rustproof corrosion-resistant valve |
| CN103291951A (en) * | 2013-06-19 | 2013-09-11 | 杨涛 | Scouring-resistant wear-resistant corrosion-resistant mid-high pressure ceramic ball valve and manufacturing method thereof |
-
2013
- 2013-09-26 CN CN201310446570.9A patent/CN103537872B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58206326A (en) * | 1982-05-27 | 1983-12-01 | Akebono Brake Ind Co Ltd | Piston manufacturing method |
| CN101338832A (en) * | 2008-08-15 | 2009-01-07 | 江苏金石油气井口科技有限公司 | Static pressure mosaic valve body anti-corrosive device |
| CN102650344A (en) * | 2012-04-19 | 2012-08-29 | 吴忠仪表有限责任公司 | Corrosion-resistant, wear-resistant camflex valve |
| CN203162202U (en) * | 2013-03-21 | 2013-08-28 | 温州昌一阀门有限公司 | Rustproof corrosion-resistant valve |
| CN103291951A (en) * | 2013-06-19 | 2013-09-11 | 杨涛 | Scouring-resistant wear-resistant corrosion-resistant mid-high pressure ceramic ball valve and manufacturing method thereof |
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| CN103537872B (en) | 2015-09-23 |
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