CN103537872B - A kind of Corrosion resistance technology for internal surface of large-diameter ball valve body - Google Patents
A kind of Corrosion resistance technology for internal surface of large-diameter ball valve body Download PDFInfo
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- CN103537872B CN103537872B CN201310446570.9A CN201310446570A CN103537872B CN 103537872 B CN103537872 B CN 103537872B CN 201310446570 A CN201310446570 A CN 201310446570A CN 103537872 B CN103537872 B CN 103537872B
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- stainless steel
- valve body
- steel coil
- 1cr18ni9ti
- 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 present invention relates to a kind of Corrosion resistance technology for internal surface of large-diameter ball valve body, comprise the following steps: (1). needed by valve body hole car in liner 1Cr18Ni9Ti stainless steel coil to required size, to reserve stainless steel coil thickness; (2). prefabricated 1Cr18Ni9Ti stainless steel coil, along the circumferential direction blocks formation steel band by the stainless steel coil after processing, makes one group of through hole each section of stainless steel band width is uniform; (3). each section of stainless steel band welding rod made is welded in the corresponding position of valve body, is shaped to a complete 1Cr18Ni9Ti stainless steel mating surface until be soldered by whole mating surface; (4). by hole dimension finish turning in the valve body after welding to reaching drawing requirement.The present invention be a kind of reasonable in design, be easy to realize Corrosion resistance technology for internal surface of large-diameter ball valve body, present invention process guarantee original serviceability prerequisite under, greatly reduce processing cost and material cost, and improve operating efficiency and first-time qualification rate.
Description
Technical field
The present invention relates to ball valve technical field, especially a kind of Corrosion resistance technology for internal surface of large-diameter ball valve body relating generally to the position that main valve body contacts with seal ring, the position that auxiliary valve body contacts with seal ring.
Background technology
In order to improve corrosion resistance and the wearability of mating surface, my company adopts at its surface overlaying stainless steel 1Cr18Ni9Ti, the method on postwelding finish turning surface.Example is processed as with the main valve body of ZGQ47H100/1100 ball valve.First needed by main valve body hole dimension car to one side in built-up welding to reserve 3 millimeters of built-up welding amounts, subsequent processing starts built-up welding 1Cr18Ni9Ti, requires that overlay cladding is not less than 5 millimeters thick, for next step finish turning operation reserves allowance.Hole dimension in finish turning is needed to reach drawing requirement after built-up welding operation completes.Adopt and also have its weak point in this way, because main valve body volume is comparatively large, out-of-shape.Automatic surfacing cannot be realized with automatic welder(welding machine) when built-up welding, the manually operated alternative of manual electric arc welding can only be taked to take vertical position welding mode to weld.In order to reach overlay cladding thickness requirement, welder need 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 that this procedure of built-up welding spends and fee of material quite high.Again due to large, the consuming time length of built-up welding area, affect by manual arc-welding operations person welding stability, when finish turning overlaying surface, often find that overlay cladding produces the weld defect such as pore and crackle.Need to stop after finding defect repair welding again and then finish turning.The phenomenon of so repeatedly repairing often occurs, and greatly reduces production efficiency.Although can ensure the serviceability of ball valve, material cost and processing cost are but very large, which adds 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 Corrosion resistance technology for internal surface of large-diameter ball valve body with first-time qualification rate.
The object of the invention is to be realized by following technological means:
A kind of Corrosion resistance technology for internal surface of large-diameter ball valve body, is characterized in that: comprise the following steps:
(1). needed by valve body hole car in liner 1Cr18Ni9Ti stainless steel coil to required size, to reserve stainless steel coil thickness;
(2). prefabricated 1Cr18Ni9Ti stainless steel coil, along the circumferential direction blocks formation steel band by the stainless steel coil after processing, makes one group of through hole each section of stainless steel band width is uniform;
(3). each section of stainless steel band welding rod made is welded in the corresponding position of valve body, is shaped to a complete 1Cr18Ni9Ti stainless steel mating surface until be soldered by whole mating surface;
(4). by hole dimension finish turning in the valve body after welding to reaching drawing requirement.
And, the position that the position that the (1) described valve body of step needs hole in inner liner stainless steel circle to comprise main valve body contacts with seal ring, auxiliary valve body contact with seal ring.
And the (2) described detailed process of step is: first prefabricated stainless steel coil, namely adopts 8-12 millimeter 1Cr18Ni9Ti corrosion resistant plate to roll, according to the size of process determination stainless steel coil external diameter and width, carries 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 to be formed there is the steel band of certain arc length, make one group of through hole each section of stainless steel band width is uniform.
And, the (3) described detailed process of step is: 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 1Cr18Ni9Ti welding rod made, also to burn-on at the position of making through hole, until whole mating surface is soldered whole.
Advantage of the present invention and good effect are:
1, this technique is that traditional overall built-up welding 1Cr18Ni9Ti mating surface is changed to liner 1Cr18Ni9Ti stainless steel coil method, the stainless steel coil be about to after processing along the circumferential direction blocks formation steel band, and this stainless steel band 1Cr18Ni9Ti welding rod is welded to valve interior surface, it is made to form complete 1Cr18Ni9Ti stainless steel mating surface, again through this mating surface of finish turning, the serviceability of ball valve can be ensured.This process is simply easy to realize, and significantly can increase work efficiency, reduces material consumption after using.
2, can number of times of doing over again be reduced after adopting this technique, therefore not only can improve working (machining) efficiency, and can also first-time qualification rate be improved, products quality guarantee.
3, the present invention be a kind of reasonable in design, be easy to realize Corrosion resistance technology for internal surface of large-diameter ball valve body, present invention process is under the original serviceability prerequisite of guarantee, greatly reduce processing cost and material cost, and improve operating efficiency and first-time qualification rate.
Accompanying drawing explanation
Fig. 1 is the 1Cr18Ni9Ti stainless steel band schematic diagram needing liner;
Fig. 2 is the partial schematic diagram of the valve body adopting the inventive method processing.
Detailed description of the invention
Embodiments of the invention are described in detail below in conjunction with accompanying drawing; 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 kind of Corrosion resistance technology for internal surface of large-diameter ball valve body, comprises the following steps:
(1). to be needed by valve body 3 in liner 1Cr18Ni9Ti stainless steel coil hole car to required size, reserved stainless steel coil thickness, the position that the position needing the position of carrying out anticorrosion antiwear processing mainly to comprise main valve body contacts with seal ring, auxiliary valve body contact with seal ring;
(2). first prefabricated stainless steel coil, namely adopts the 1Cr18Ni9Ti corrosion resistant plate of 8-12 millimeter to roll, and according to the size of process determination stainless steel coil external diameter and width, carries out necessary heat treatment and eliminates 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 to be formed there is the steel band 1 of certain arc length, make one group of through hole 2 each section of stainless steel band width is uniform;
(3). 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 1Cr18Ni9Ti welding rod made, also to burn-on at the position of making through hole, be shaped to a complete 1Cr18Ni9Ti stainless steel mating surface until be soldered by whole mating surface;
(4). by hole dimension finish turning in the valve body after welding to reaching drawing requirement.
Be processed as example with the main valve body of ZGQ47H100/1100 ball valve below, this technological process be described:
(1). main valve body is needed in liner 1Cr18Ni9Ti stainless steel coil that hole dimension car is to φ 1346 millimeters and φ 1246 millimeters, namely one side reserves 8 millimeters of stainless steel coil thickness.
(2). prefabricated stainless steel coil, roll with the 1Cr18Ni9Ti corrosion resistant plate of 12 millimeters, be defined as stainless steel coil external diameter x width dimensions according to process 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 process φ 1346 millimeters and φ 1246 millimeters, stainless steel coil after processing is along the circumferential direction blocked formation steel band, its arc length is made to be 400-500 millimeter, through hole 4-5 (spacing is that X is about 100-150 millimeter) of φ 10 millimeter is beaten every Y=30 millimeter at each section of stainless steel band width.
(3). 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 1Cr18Ni9Ti welding rod made, also to burn-on at the position beating φ 10 millimeter opening, until be soldered whole by whole mating surface, notice that weld seam wants through welding, weldering completely.
(4). finally by drawing, hole finish turning in it is reached drawing requirement to φ 1330 millimeters and φ 1230 mm size, namely complete whole work flow.
Claims (3)
1. a Corrosion resistance technology for internal surface of large-diameter ball valve body, is characterized in that: comprise the following steps:
(1). needed by valve body hole car in liner 1Cr18Ni9Ti stainless steel coil to required size, to reserve stainless steel coil thickness;
(2). prefabricated 1Cr18Ni9Ti stainless steel coil, along the circumferential direction blocks formation steel band by the stainless steel coil after processing, makes one group of through hole each section of stainless steel band width is uniform; The detailed process of this step is: first prefabricated stainless steel coil, namely adopts 8-12 millimeter 1Cr18Ni9Ti corrosion resistant plate to roll, and according to the size of process determination stainless steel coil external diameter and width, carries out necessary heat treatment and eliminates 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 to be formed there is the steel band of certain arc length, make one group of through hole each section of stainless steel band width is uniform;
(3). each section of stainless steel band welding rod made is welded in the corresponding position of valve body, is shaped to a complete 1Cr18Ni9Ti stainless steel mating surface until be soldered by whole mating surface;
(4). by hole dimension finish turning in the valve body after welding to reaching drawing requirement.
2. a kind of Corrosion resistance technology for internal surface of large-diameter ball valve body according to claim 1, is characterized in that: the position that the position that the (1) described valve body of step needs hole in inner liner stainless steel circle to comprise main valve body contacts with seal ring, auxiliary valve body contact with seal ring.
3. a kind of Corrosion resistance technology for internal surface of large-diameter ball valve body according to claim 1, it is characterized in that: the (3) described detailed process of step is: 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 1Cr18Ni9Ti welding rod made, also to burn-on at the position of making through hole, until whole mating surface is soldered whole.
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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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| 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 CN103537872A (en) | 2014-01-29 |
| CN103537872B true CN103537872B (en) | 2015-09-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS58206326A (en) * | 1982-05-27 | 1983-12-01 | Akebono Brake Ind Co Ltd | Piston manufacturing method |
| CN101338832B (en) * | 2008-08-15 | 2010-07-28 | 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 |
| CN103291951B (en) * | 2013-06-19 | 2016-03-16 | 杨涛 | Resistance to erosion is wear-resistant corrosion-resistant middle-high-pressure ceramic ball valve and preparation method thereof |
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