CN101737544B - Manufacturing method of ball valve body - Google Patents
Manufacturing method of ball valve body Download PDFInfo
- Publication number
- CN101737544B CN101737544B CN2010100420438A CN201010042043A CN101737544B CN 101737544 B CN101737544 B CN 101737544B CN 2010100420438 A CN2010100420438 A CN 2010100420438A CN 201010042043 A CN201010042043 A CN 201010042043A CN 101737544 B CN101737544 B CN 101737544B
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- Prior art keywords
- steel pipe
- valve body
- manufacturing
- valve
- forging
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- Expired - Fee Related
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 238000005242 forging Methods 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 11
- 238000004513 sizing Methods 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000000137 annealing Methods 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 claims description 2
- 238000007723 die pressing method Methods 0.000 abstract 2
- 238000000465 moulding Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
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Abstract
The invention discloses a manufacturing method of ball valve bodies, comprising the following steps: (1) steel tube blanking, heating a steel tube which is blanked with segment materials; (2) placing the heated steel tube into a lower die for die pressing and forging to lead the lower end of the steel tube to be a necking circular tube; smoothly transiting the circumscribed cylinder of the unformed part of the necking circular tube and the steel tube through the ball surface, and discharging the semiformed material; (3) placing the semiformed material in the lower die after being turned around, the unformed part of the semiformed material is downward, the lower part of the semiformed material is formed by die pressing and forging to obtain the material with two symmetrical semi-part shapes; and (4) arranging a radial hole in the middle part of the material, and butting a tubular column on the radial hole and welding. The manufacturing method has simple process, lower processing cost, less seams of the integral valve body, high strength, strong pressure resistance, light weight, saved material and obvious economic benefit, and is especially suitable for manufacturing high-pressure ball valve body with all-welded pipelines.
Description
Technical field
The present invention relates to the processing technique of valve, specifically, relate to a kind of manufacturing method of ball valve bodies.
Background technique
At present, the manufacture method of high-pressure ball valve valve body mainly contains casting and forges back welding dual mode.For guaranteeing the intensity and the anti-pressure ability of valve body, international standard stipulates that full welding type valve body can not weld with foundry goods, can only be welded by forging.And present forged steel valve body is to be welded by main body and two-pack body, main body and two-pack body need to forge respectively, as shown in Figure 1, the main body 20 that forging forms is large diameter tube, and two accessory bodies are welded on the main body both sides respectively, and two accessory bodies are made of the straight tube 22 and flaring pipe 21 welding of minor diameter, flaring pipe 21 is connected straight tube 22 with main body 20, also be welded with valve rod base 23 on main body 20, valve rod base 23 is provided with through hole 23a, and person in charge's axis of this through hole 23a axis and valve body is perpendicular.This valve body manufacturing process complexity, technological difficulties are many, and the manufacture cost height because its weld seam is many, also influences the anti-pressure ability of valve body; The valve body member is made by forged steel, and materials are many, valve body heaviness, cost of material height.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of manufacturing method of ball valve bodies, and its technology is simple, materials are few, and cost of production is low; The weld seam of valve body is few, valve body anti-pressure ability height.
For solving above technical problem, technological scheme of the present invention is as follows: a kind of manufacturing method of ball valve bodies comprises the steps: (1), uses the steel pipe blanking, with the steel pipe heating of descending into the section material; (2), the steel pipe after will heating places counterdie to carry out the mold pressing forging, the die cavity of described counterdie is a bucket shape, its bucket portion is the bowl-type die cavity, the bottom of this bowl-type die cavity is connected by straight hole, make the forging that is molded of the lower end of steel pipe be configured as the necking down pipe, the outer cylinder at necking down pipe and steel pipe unshaped position is by sphere smooth transition, discharging half form materials and parts; (3), the tune of half form materials and parts is placed in the described counterdie, the unshaped position of half form materials and parts down, the die cavity of this station patrix is identical with the die cavity of described counterdie, the forging that is molded of the bottom of half form materials and parts is shaped, obtain the person in charge of two halves shape symmetry, the middle part of being responsible for is the major diameter cavity that holds valve ball, and two ends are the necking down pipe of minor diameter; (4), offer a radial hole, butt joint one tubing string on this radial hole obtains valve body with this tubing string with being responsible for to weld mutually at the middle part of being responsible for.
The present invention's employing is drawn materials, and steel pipe is as raw material easily, and the major component of mold pressing forging shaping valve body replaces main body and two-pack body in the past by the steel pipe after being shaped, steel pipe is a unitary moulding spare, only weld the tubing string of a dress valve rod, manufacturing process is simple, and cost of production is low; Because being responsible for as main body is unitary moulding, the weld seam of valve body is few, and intensity height, anti-pressure ability are strong, and particularly critical external compressive resistance power and anti-vibration collapsing force are strong; Draw materials by the steel pipe blanking, need not heavy take the forged steel of material, in light weight, can economical with materials 40～50%.
As further improvement, for ease of liquid metal forging, carry out local heating after the described steel pipe blanking, the heating position, is heated steel pipe the position then and is placed counterdie to carry out the mold pressing forging down to the middle part from the one end; After the discharging of described half form materials and parts, with the unshaped position heating of half form materials and parts, more described counterdie is put at the unshaped position of half form materials and parts down, then by described patrix mold pressing forging, obtain the person in charge of two halves shape symmetry.
As further improvement, for further improving the intensity and the anti-pressure ability of valve body, described steel pipe is a seamless steel pipe, behind the person in charge who obtains described two halves shape symmetry, also this person in charge is put into upper and lower sizing die with hemisphere die cavity, by upper and lower sizing die the described person in charge's middle part is forged into spherical cavity, and then offers radial hole welding tubing string, obtain valve body.
Further, be the fitting tight seat, carry out follow-up cutting, described valve body is carried out stress relief annealing,, on inwall, process the sealing seat hole near two necking down pipes of middle part major diameter cavity then in enterprising driving of described valve body or boring processing.
Further, as following process, valve ball and two sealing seats are packed in the described valve body, two sealing seats are arranged in described sealing seat hole, and the top of described valve ball has extended upward valve rod; This valve rod passes from tubing string, and the end face of this tubing string is by the valve gap sealing of band center hole, and valve gap and tubing string welding are fixing.
Further, antirust anticorrosive for energy, described steel pipe is a stainless-steel seamless pipe.
The invention has the beneficial effects as follows:
1, by the whole valve body of steel pipe mold pressing forging, technology simple technique difficult point is few, and processing cost is low, is adapted to make the all-welded high-pressure ball valve valve body of pipeline especially;
2, the weld seam of integrated type valve body is few, and intensity height, anti-pressure ability are strong, and particularly critical external compressive resistance power and anti-vibration collapsing force are strong, if having drawn from the seamless steel pipe better effects if;
3, in light weight, economical with materials is if large valve body can be saved lot of materials cost, remarkable in economical benefits;
4, draw materials conveniently available carbon steel and Stainless Steel Tube mold pressing forging.
Description of drawings
Fig. 1 is the structural representation of traditional forged steel valve body.
The structural representation (loading onto valve ball, valve rod and sealing seat) of the integrated type valve body that Fig. 2 makes for the embodiment of the invention.
Fig. 3 is the operation schematic representation of the embodiment of the invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
As shown in Figure 2, make the valve body that an inside nominal diameter is DN300, adopt the oil hydraulic press equipment of 500T, as shown in Figure 3, seamless steel pipe blanking with Φ 530～550mm earlier becomes length to be about the section material steel pipe 1 of 1000mm, section is expected that steel pipe 1 carries out local heating, the heating position to the middle part, is heated to 800～1000 ℃ from the one end again; The heating position of then section being expected steel pipe 1 places counterdie 2 to carry out the mold pressing forging down, the die cavity of described counterdie 2 is a bucket shape, the 2a of its bucket portion is the bowl-type die cavity, the bottom of this bowl-type die cavity 2a is connected by straight hole 2b, upsetting by oil hydraulic press, the forging that is molded of the lower end of the section of making material steel pipe 1 is configured as the necking down pipe 3a of minor diameter, and the outer cylinder at necking down pipe 3a and steel pipe unshaped position is passed through sphere 3b smooth transition, discharging half form materials and parts 3; Then the unshaped position with half form materials and parts 3 is heated to about 800 ℃, again counterdie 2 is put at the unshaped position of half form materials and parts 3 down, the die cavity of the patrix 4 of this station is identical with the die cavity of counterdie 2, thereby protection is positioned at the shaping on half form materials and parts 3 tops not by the forging and pressing distortion, the forging that is molded of the lower end of half form materials and parts 3 is shaped, obtain the person in charge 5 of two halves shape symmetry, the person in charge 5 middle part is the major diameter cavity 5a that holds valve ball, and two ends are the necking down pipe 5b of minor diameter; Then will be responsible for 5 and put into upper and lower sizing die 6,7, will be responsible for 5 middle part by upper and lower sizing die 6,7 and be forged into spherical cavity 5c with hemisphere die cavity; Offer a radial hole at the middle part of materials and parts spherical cavity 5c then, on this radial hole, dock a tubing string 8, this tubing string 8 is welded mutually with the person in charge 5 obtain valve body.
Be the fitting tight seat, carry out follow-up cutting, valve body is annealed, to eliminate stress, then in enterprising driving of valve body or boring processing, on inwall, process sealing seat hole 5d near the two necking down pipe 5b of middle part spherical cavity 5c, valve ball 9 and two sealing seats 10 are packed in the valve body, two sealing seats 10 are arranged in sealing seat hole 5d, and the top of valve ball 9 has extended upward valve rod 11; This valve rod 11 passes from tubing string 8, and the end face of this tubing string 8 is by valve gap 12 sealings of band center hole, and valve gap 12 is fixing with tubing string 8 welding.Because being responsible for 5 main bodys as valve body is unitary mouldings, the weld seam of whole valve body is few, and intensity height, anti-pressure ability are strong, and particularly critical external compressive resistance power and anti-vibration collapsing force are strong, and in light weight, can economical with materials 40～50%.
Claims (6)
1. a manufacturing method of ball valve bodies is characterized in that, comprises the steps: (1), uses the steel pipe blanking, with the steel pipe heating of descending into the section material; (2), the steel pipe after will heating places counterdie to carry out the mold pressing forging, the die cavity of described counterdie is a bucket shape, its bucket portion is the bowl-type die cavity, the bottom of this bowl-type die cavity is connected by straight hole, make the forging that is molded of the lower end of steel pipe be configured as the necking down pipe, the outer cylinder at necking down pipe and steel pipe unshaped position is by sphere smooth transition, discharging half form materials and parts; (3), the tune of half form materials and parts is placed in the described counterdie, the unshaped position of half form materials and parts down, the die cavity of this station patrix is identical with the die cavity of described counterdie, the forging that is molded of the bottom of half form materials and parts is shaped, obtain the person in charge of two halves shape symmetry, the middle part of being responsible for is the major diameter cavity that holds valve ball, and two ends are the necking down pipe of minor diameter; (4), offer a radial hole, butt joint one tubing string on this radial hole obtains valve body with this tubing string with being responsible for to weld mutually at the middle part of being responsible for.
2. a kind of manufacturing method of ball valve bodies according to claim 1 is characterized in that: carry out local heating after the described steel pipe blanking, the heating position, is heated steel pipe the position then and is placed counterdie to carry out the mold pressing forging down to the middle part from the one end; After the discharging of described half form materials and parts, with the unshaped position heating of half form materials and parts, more described counterdie is put at the unshaped position of half form materials and parts down, then by described patrix mold pressing forging, obtain the person in charge of two halves shape symmetry.
3. a kind of manufacturing method of ball valve bodies according to claim 1 and 2, it is characterized in that: described steel pipe is a seamless steel pipe, behind the person in charge who obtains described two halves shape symmetry, also this person in charge is put into upper and lower sizing die with hemisphere die cavity, by upper and lower sizing die the described person in charge's middle part is forged into spherical cavity, and then offer radial hole welding tubing string, obtain valve body.
4. a kind of manufacturing method of ball valve bodies according to claim 3, it is characterized in that: described valve body is carried out stress relief annealing, then in enterprising driving of described valve body or boring processing, on inwall, process the sealing seat hole near two necking down pipes of middle part major diameter cavity.
5. a kind of manufacturing method of ball valve bodies according to claim 4 is characterized in that: valve ball and two sealing seats are packed in the described valve body, and two sealing seats are arranged in described sealing seat hole, and the top of described valve ball is connected with valve rod; This valve rod passes from tubing string, and the end face of this tubing string is by the valve gap sealing of band center hole, and valve gap and tubing string welding are fixing.
6. a kind of manufacturing method of ball valve bodies according to claim 3 is characterized in that: described steel pipe is a stainless-steel seamless pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100420438A CN101737544B (en) | 2010-01-12 | 2010-01-12 | Manufacturing method of ball valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100420438A CN101737544B (en) | 2010-01-12 | 2010-01-12 | Manufacturing method of ball valve body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101737544A CN101737544A (en) | 2010-06-16 |
| CN101737544B true CN101737544B (en) | 2011-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010100420438A Expired - Fee Related CN101737544B (en) | 2010-01-12 | 2010-01-12 | Manufacturing method of ball valve body |
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| Country | Link |
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| CN (1) | CN101737544B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102990288B (en) * | 2012-08-17 | 2015-08-19 | 大连大高阀门股份有限公司 | Core secondary stainless steel body Forging Technology |
| CN102886477A (en) * | 2012-10-19 | 2013-01-23 | 中国二十二冶集团有限公司 | Ball core closed-die forging process using valve body ball core forging die |
| CN103752828B (en) * | 2014-02-19 | 2015-07-22 | 安徽卧龙泵阀有限责任公司 | Sintering die for ball body of ball valve |
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2010
- 2010-01-12 CN CN2010100420438A patent/CN101737544B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101737544A (en) | 2010-06-16 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20100616 Assignee: HENAN SHENZHOU HEAVY HEADS CO., LTD. Assignor: Zhang Xuan Contract record no.: 2012410000076 Denomination of invention: Manufacturing method of ball valve body Granted publication date: 20110914 License type: Exclusive License Record date: 20120918 |
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Owner name: ZHANG XIAOFENG Free format text: FORMER OWNER: ZHANG XUAN Effective date: 20140213 |
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Free format text: CORRECT: ADDRESS; FROM: 400020 JIANGBEI, CHONGQING TO: 400011 YUZHONG, CHONGQING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140213 Address after: 400011 No. 30, Shaanxi Road, Yuzhong District, Chongqing, 1-2 Patentee after: Zhang Xiaofeng Address before: The five store Chongqing Jiangbei District 400020 Chongqing Jinke Lai city residents 1-A Patentee before: Zhang Xuan |
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| TR01 | Transfer of patent right | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: HENAN SHENZHOU HEAVY HEADS CO., LTD. Assignor: Zhang Xuan Contract record no.: 2012410000076 Date of cancellation: 20140708 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20100616 Assignee: Chongqing Tetong Valve Co., Ltd. Assignor: Zhang Xiaofeng Contract record no.: 2014500000043 Denomination of invention: Manufacturing method of ball valve body Granted publication date: 20110914 License type: Exclusive License Record date: 20140722 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
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Granted publication date: 20110914 Termination date: 20150112 |
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