CN113878318A - Production process of auxiliary valve body of spherical fixed ball valve - Google Patents
Production process of auxiliary valve body of spherical fixed ball valve Download PDFInfo
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- CN113878318A CN113878318A CN202111388142.6A CN202111388142A CN113878318A CN 113878318 A CN113878318 A CN 113878318A CN 202111388142 A CN202111388142 A CN 202111388142A CN 113878318 A CN113878318 A CN 113878318A
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention belongs to the technical field of application of welding ball valves for urban heating, and relates to a spherical fixed ball valve sub-valve body, in particular to a production process of the spherical fixed ball valve sub-valve body. Firstly, selecting a proper steel plate according to the thickness and the size of the auxiliary valve body to be processed; the steel plate coil is cylindrical and welded to obtain a blank; heating the blank, and after the heating is finished, vertically placing the blank below a forging press; cooling the bottom of the blank, and placing a forming die above the blank; the forging press presses down and is formed by one-step forging and pressing by using a forming die for later use; machining the auxiliary valve body sealing ring; and welding the auxiliary valve body sealing ring and the compression-molded blank together to obtain the spherical fixed ball valve auxiliary valve body. The method provided by the invention has the advantages of simple process, convenience in operation and high production efficiency, and is suitable for large-scale popularization and use.
Description
Technical Field
The invention belongs to the technical field of application of welding ball valves for urban heating, and relates to a spherical fixed ball valve sub-valve body, in particular to a production process of the spherical fixed ball valve sub-valve body.
Background
All-welded ball valves are widely used in various fields, the superior quality and the high-performance stability of the all-welded ball valves cannot be achieved by common cast steel ball valves, the service life of the all-welded ball valves is far longer than that of cast steel ball valves, and the all-welded ball valves are widely applied to various kinds of pipeline equipment such as urban gas, urban heat supply, petrochemical industry, shipbuilding, steel, pressure regulating stations, power plants and the like.
In order to ensure the stability of long-term operation of a heat supply pipeline, the state implements national standards of GB/T37827-2019 urban heat supply welded ball valves from 7/1/2020, wherein a typical structure of a spherical fixed ball valve is given in the standard, and the spherical fixed ball valve mainly has a structure that two auxiliary valve bodies are combined to form a ball valve.
The forging method can obtain a corresponding auxiliary valve body, but has the following technical problems: 1. the operation process is complex, and continuous forging and pressing are not needed in the whole forging process, so that the forging die can reach a corresponding shape; 2. the cutting amount is large, and the shape of the forged auxiliary valve body can only be approximate, so that the final shape can be achieved only by cutting a large amount, the cutting amount is large, the production cost is high, and the production efficiency is low.
Disclosure of Invention
Aiming at the technical problems of the auxiliary valve body production process, the invention provides the production process of the auxiliary valve body of the spherical fixed ball valve, which has the advantages of simple method, small processing amount, high production efficiency and low production cost.
In order to achieve the aim, the invention adopts the technical scheme that the production process of the auxiliary valve body of the spherical fixed ball valve is characterized by comprising the following effective steps of:
a. firstly, selecting a proper steel plate according to the thickness and the size of the auxiliary valve body to be processed;
b. the steel plate coil is cylindrical and welded to obtain a blank;
c. heating the blank, and after the heating is finished, vertically placing the blank below a forging press;
d. cooling the bottom of the blank, and placing a forming die above the blank;
e. the forging press presses down and is formed by one-step forging and pressing by using a forming die for later use;
f. machining the auxiliary valve body sealing ring;
g. and welding the auxiliary valve body sealing ring and the compression-molded blank together to obtain the spherical fixed ball valve auxiliary valve body.
Preferably, in the step a, the ratio of the thickness of the steel plate to the thickness of the auxiliary valve body is 10-12: 8.
Preferably, in the step c, the blank is heated to 900 ℃ +/-20 ℃.
Preferably, in the step d, a containing groove is arranged below the blank, and water is added into the containing groove to achieve the purpose of cooling the bottom of the blank.
Preferably, the molding die is arranged in a bowl shape.
Preferably, the auxiliary valve body sealing ring is arranged in an annular shape, and one surface, close to the blank, of the sealing ring is arranged in a cambered surface notch shape.
Compared with the prior art, the invention has the advantages and positive effects that,
1. the invention provides a production process of a spherical fixed ball valve auxiliary valve body, which creatively adopts a mode of compression molding and welding to realize the molding of the auxiliary valve body, thereby improving the production efficiency and simultaneously avoiding the technical problem of high blank waste caused by a large amount of cutting.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic structural view of a molding die provided in embodiment 1;
fig. 2 is a schematic structural view of a sub-valve body seal ring provided in embodiment 1;
FIG. 3 is a sectional view of the sub-valve body of the spherical fixed ball valve provided in embodiment 1;
in the above figures, 1, an auxiliary valve body; 2. forming a mold; 3. a secondary valve body sealing ring; 4. a welding area.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.
As can be seen from the shape of the sub-valve body 1 of the spherical fixed ball valve shown in fig. 3, because the two sub-valve bodies 1 are combined to form a sphere, the whole sub-valve body 1 is similar to a bowl shape, only the straight pipe part is longer, and similarly, in order to ensure sealing, the inner side surface of the transition part is not an arc surface but a step surface, so that more thickness needs to be reserved in the transition part between the two parts in the forging process to facilitate cutting, thereby greatly increasing the working strength. For this reason, the present embodiment is provided, and it should be noted that the method provided by the present embodiment is mainly directed to a large-sized spherical fixed ball valve, that is, a spherical fixed ball valve with a diameter of more than 500 mm.
Firstly, selecting a proper steel plate according to the thickness and the size of the sub-valve body 1 to be processed, taking the thickness of the sub-valve body 1 as 40mm as an example, the thickness of the selected steel plate is 55mm, the ratio of the thickness of the selected steel plate to the thickness of the selected steel plate is about 8:11, the ratio of the thickness of the selected steel plate to the thickness of the selected steel plate is between 8:10 and 12 due to the specification limitation of the thickness of the selected steel plate, and the optimal ratio of the thickness of the selected steel plate to the thickness of the selected steel plate is 8: 11. This is because the subsequent process requires deformation and the steel sheet is stretched, and therefore, the variables thereof need to be satisfied. The length of the steel plate is the same as the inner diameter of the straight pipe part of the auxiliary valve body 1 after being coiled, and through test comparison, the process dosage provided by the embodiment is 30% less than that of the traditional forging dosage only from the selection of the steel dosage.
Then, the steel sheet was rolled into a cylindrical shape by a plate rolling machine and welded to obtain a cylindrical blank.
And then heating the welded blank, wherein the heating temperature is controlled to be 900 +/-20 ℃, and the temperature is favorable for processing and deforming the blank. If excessive, the metallographic structure of the blank may be altered, which is detrimental to the finished product.
After the blank is heated, the blank is vertically placed below a forging press, and because the straight pipe part of the whole auxiliary valve body 1 is different, the shape of the straight pipe part is kept, only the upper half part of the blank is deformed, therefore, in the embodiment, a containing groove is arranged below the forging press and is arranged in a basin shape, water is added into the containing groove, and the height of the water is based on two thirds of the straight pipe part of the auxiliary valve body 1, so that the lower end of the blank is not deformed, and the deformation of the upper end part is not influenced.
Then, the forming die 2 is placed above the blank, the whole forming die 2 is also arranged in a bowl shape, and the straight pipe part of the forming die 2 is longer, so that the forming die 2 is placed in the blank, and the straight pipe part of the forming die 2 is sleeved in the blank, so that the forming die and the blank are coaxially arranged.
Under the condition, the forging press starts to work, and under the action of the forging press, the forming die 2 continuously moves downwards to further prop up the upper end of the blank to form the bowl-shaped structure of the sub-valve body 1, and it should be noted that, in order to facilitate the pressing and demoulding of the forming die 2, in the present embodiment, graphite oil is coated on the surface of the forming die 2, so as to further reduce the resistance. Thus, under the action of the forming die 2, the whole process can be formed at one time, and the traditional forging needs to forge and press for multiple times to form under the reciprocating forging press.
Because the whole blank is molded, the bowl-shaped structure and the straight pipe part have no excessive thickness for cutting, so that the cutting process is omitted, in the embodiment, the part of the traditional auxiliary valve body 1 is separately machined in a machining mode, and due to the structure, the part can be matched with a small part of machining in a twisting and pressing mode. In the present embodiment, this is named as the sub-valve-body seal ring 3.
For better being in the same place vice valve body sealing washer 3 and compression molding's blank welding, in this embodiment, vice valve body sealing washer 3 is the setting of annular setting and the sealing washer is close to the one side of blank and is the setting of cambered surface breach form, thus, both contact surfaces can laminate, and in order to weld both, because vice valve body sealing washer 3 face of weld is the right angle face, thus, the welding volume is great, can further ensure stability between them, make it reach the performance of forging, thus, the vice valve body sealing washer 3 of solitary processing, it is not only that the work volume is little and its weight is less than current forged vice valve body 1 far away, do not need large-scale machining equipment to accomplish, the manufacturing cost who reduces.
And welding the two to obtain the auxiliary valve body 1 of the spherical fixed ball valve.
In the whole process, the material consumption is greatly reduced, the processing amount and the processing times are obviously reduced, the working efficiency is improved, the production cost is reduced, and the market competitiveness is improved.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (6)
1. The production process of the auxiliary valve body of the spherical fixed ball valve is characterized by comprising the following effective steps of:
a. firstly, selecting a proper steel plate according to the thickness and the size of the auxiliary valve body to be processed;
b. the steel plate coil is cylindrical and welded to obtain a blank;
c. heating the blank, and after the heating is finished, vertically placing the blank below a forging press;
d. cooling the bottom of the blank, and placing a forming die above the blank;
e. the forging press presses down and is formed by one-step forging and pressing by using a forming die for later use;
f. machining the auxiliary valve body sealing ring;
g. and welding the auxiliary valve body sealing ring and the compression-molded blank together to obtain the spherical fixed ball valve auxiliary valve body.
2. The production process of the auxiliary valve body of the spherical fixed ball valve according to claim 1, wherein in the step a, the ratio of the thickness of the steel plate to the thickness of the auxiliary valve body is 10-12: 8.
3. A process for producing a sub-valve body of a spherical fixed ball valve according to claim 1, wherein in the step c, the blank is heated to 900 ℃ ± 20 ℃.
4. The production process of the auxiliary valve body of the spherical fixed ball valve as claimed in claim 1, wherein in the step d, a containing groove is arranged below the blank, and water is added into the containing groove to achieve the purpose of cooling the bottom of the blank.
5. The process for producing a sub-valve body of a spherical fixed ball valve according to claim 1, wherein the forming mold is in a bowl shape.
6. The production process of the auxiliary valve body of the spherical fixed ball valve according to claim 1, wherein the sealing ring of the auxiliary valve body is arranged in a ring shape, and one surface of the sealing ring close to the blank is arranged in a cambered surface notch shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111388142.6A CN113878318B (en) | 2021-11-22 | 2021-11-22 | Production process of auxiliary valve body of spherical fixed ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111388142.6A CN113878318B (en) | 2021-11-22 | 2021-11-22 | Production process of auxiliary valve body of spherical fixed ball valve |
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| CN113878318A true CN113878318A (en) | 2022-01-04 |
| CN113878318B CN113878318B (en) | 2023-08-22 |
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| CN202111388142.6A Active CN113878318B (en) | 2021-11-22 | 2021-11-22 | Production process of auxiliary valve body of spherical fixed ball valve |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201521698U (en) * | 2009-10-15 | 2010-07-07 | 山东石 | Ball valve housing forging |
| CN103769800A (en) * | 2012-10-22 | 2014-05-07 | 河南神州重型封头有限公司 | Manufacture process for ball valve ball casing |
| CN107598064A (en) * | 2017-07-31 | 2018-01-19 | 四川凯茨实业集团有限公司 | Forging and forming technology with handle flanged ball valve valve body |
| CN109967553A (en) * | 2017-12-27 | 2019-07-05 | 上海新闵重型锻造有限公司 | A kind of forming method of the dome head with extension pipe |
| RU2706392C1 (en) * | 2018-08-23 | 2019-11-18 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технологический университет "СТАНКИН" (ФГБОУ ВО "МГТУ "СТАНКИН") | Method of manufacturing large-size forgings of half-cases of ball valves |
| CN110805732A (en) * | 2019-11-21 | 2020-02-18 | 替科斯科技集团(天津)通用阀门有限公司 | Production process of all-welded ball valve |
-
2021
- 2021-11-22 CN CN202111388142.6A patent/CN113878318B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201521698U (en) * | 2009-10-15 | 2010-07-07 | 山东石 | Ball valve housing forging |
| CN103769800A (en) * | 2012-10-22 | 2014-05-07 | 河南神州重型封头有限公司 | Manufacture process for ball valve ball casing |
| CN107598064A (en) * | 2017-07-31 | 2018-01-19 | 四川凯茨实业集团有限公司 | Forging and forming technology with handle flanged ball valve valve body |
| CN109967553A (en) * | 2017-12-27 | 2019-07-05 | 上海新闵重型锻造有限公司 | A kind of forming method of the dome head with extension pipe |
| RU2706392C1 (en) * | 2018-08-23 | 2019-11-18 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технологический университет "СТАНКИН" (ФГБОУ ВО "МГТУ "СТАНКИН") | Method of manufacturing large-size forgings of half-cases of ball valves |
| CN110805732A (en) * | 2019-11-21 | 2020-02-18 | 替科斯科技集团(天津)通用阀门有限公司 | Production process of all-welded ball valve |
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| CN113878318B (en) | 2023-08-22 |
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