CN113878318B - 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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- CN113878318B CN113878318B CN202111388142.6A CN202111388142A CN113878318B CN 113878318 B CN113878318 B CN 113878318B CN 202111388142 A CN202111388142 A CN 202111388142A CN 113878318 B CN113878318 B CN 113878318B
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- valve body
- blank
- auxiliary valve
- ball valve
- fixed ball
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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
Abstract
The application belongs to the technical field of welding ball valve application for town heat supply, relates to a spherical fixed ball valve auxiliary valve body, and particularly relates to a production process of the spherical fixed ball valve auxiliary valve body. Firstly, selecting a proper steel plate according to the thickness and the size of a secondary valve body to be processed; the method comprises the steps of (1) rolling and welding a steel plate into a cylinder shape to obtain a blank; heating the blank, and vertically placing the blank below a forging press after the heating is completed; cooling the bottom of the blank, and placing a forming die above the blank; pressing down by a forging press, and forging and forming by a forming die for standby; machining a sealing ring of the auxiliary valve body; 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 application has simple process, convenient operation and high production efficiency, and is suitable for large-scale popularization and use.
Description
Technical Field
The application belongs to the technical field of welding ball valve application for town heat supply, relates to a spherical fixed ball valve auxiliary valve body, and particularly relates to a production process of the spherical fixed ball valve auxiliary valve body.
Background
All-welded ball valves are widely used in various fields, the superior quality and 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 pipeline equipment such as urban fuel gas, urban heat supply, petrochemical industry, shipbuilding, steel, voltage regulating stations, power plants and the like.
In order to ensure the stability of long-term operation of a heat supply pipeline, national standards of GB/T37827-2019 welded ball valves for town heat supply are implemented in the beginning of 7 months in 2020, wherein a typical structure of a spherical fixed ball valve is provided in the standard, the structure is mainly composed of two auxiliary valve bodies, and the auxiliary valve bodies are mainly manufactured in a forging mode in order to ensure the stability of the structure due to the large volume of the spherical fixed ball valve.
Though the forging mode can obtain the corresponding auxiliary valve body, the following technical problems exist: 1. the operation procedure is complex, and continuous forging is not needed in the whole forging process, so that the forging is in 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 forged auxiliary valve body needs a large amount of cutting to achieve the final shape, and further the cutting amount is large, so that the production cost is high and the production efficiency is low.
Disclosure of Invention
Aiming at the technical problems of the production process of the auxiliary valve body, the application provides the production process of the spherical fixed ball valve auxiliary valve body, which has the advantages of simple method, small processing amount, high production efficiency and low production cost.
In order to achieve the purpose, the application adopts the technical scheme that the production process of the spherical fixed ball valve auxiliary valve body is characterized by comprising the following effective steps of:
a. firstly, selecting a proper steel plate according to the thickness of a to-be-processed auxiliary valve body and the inner diameter of a straight pipe part;
b. the method comprises the steps of (1) rolling and welding a steel plate into a cylinder shape to obtain a blank;
c. heating the blank, and vertically placing the blank below a forging press after the heating is completed;
d. cooling the bottom of the blank, and placing a forming die above the blank;
e. pressing down by a forging press, and forging and forming by a forming die for standby;
f. machining a sealing ring of the auxiliary valve body;
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 sub valve body is 10 to 12:8.
Preferably, in 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 forming die is bowl-shaped.
Preferably, the auxiliary valve body sealing ring is arranged in an annular shape, and one surface of the sealing ring, which is close to the blank, is arranged in a cambered surface notch shape.
Compared with the prior art, the application has the advantages and positive effects that,
1. the application provides a production process of a spherical fixed ball valve auxiliary valve body, which creatively adopts a mode of compression molding and welding, thereby improving the production efficiency, avoiding the technical problem of high waste of blanks caused by mass cutting, and simultaneously having simple process, convenient operation and high production efficiency, and being suitable for large-scale popularization and use.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic structural diagram of a molding die provided in embodiment 1;
fig. 2 is a schematic structural diagram of a seal ring of a secondary valve body provided in embodiment 1;
FIG. 3 is a cross-sectional view of a ball-fixed ball valve sub-body provided in example 1;
in the above figures, 1, an auxiliary valve body; 2. a forming die; 3. a secondary valve body sealing ring; 4. and (5) welding areas.
Detailed Description
In order that the above objects, features and advantages of the application will be more clearly understood, a further description of the application will be rendered by reference to the appended drawings and examples. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as described herein, and therefore the present application is not limited to the specific embodiments of the disclosure that follow.
Embodiment 1, as shown in fig. 1 to 3, aims to provide a production process which is completely different from the existing production process of the spherical fixed ball valve auxiliary valve body 1, so as to achieve the technical problems of providing working efficiency, reducing energy consumption and production cost.
As can be seen from the shape of the ball-shaped fixed ball valve auxiliary valve body 1 shown in fig. 3, since the two auxiliary valve bodies 1 are combined to form a ball shape, the shape of the whole auxiliary valve body 1 is similar to a bowl shape, only the straight pipe part of the auxiliary valve body is longer, and also, in order to ensure sealing, the inner side surface of the auxiliary valve body is not an arc surface but a stepped surface at the transitional part, so that more thickness is needed to be reserved at the transitional part of the auxiliary valve bodies in the forging process, thereby being convenient for cutting and greatly increasing the working strength. For this reason, the present embodiment is presented, and it should be noted that, of course, the method provided in this embodiment is mainly aimed at a large-sized ball-fixed ball valve, that is, a ball-fixed ball valve with a diameter of 500mm or more.
Firstly, selecting a proper steel plate according to the thickness and the size of the auxiliary valve body 1 to be processed, taking the thickness of the auxiliary valve body 1 as an example of 40mm, wherein the thickness of the selected steel plate is 55mm, the ratio of the steel plate to the auxiliary valve body is about 8:11, and the optimal ratio of the steel plate to the auxiliary valve body is 8:10-12 due to the specification of the thickness of the steel plate. This is because the subsequent process requires deformation and stretching of the steel sheet, and therefore, it is necessary to satisfy the variables. The length of the steel plate is equal to the inner diameter of the coiled straight pipe part of the auxiliary valve body 1, and the process dosage provided by the embodiment is 30% less than the traditional forging dosage only from the aspect of steel dosage selection through test comparison.
Then, the steel sheet is 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 900+/-20 ℃, and the processing deformation of the blank is facilitated. If excessive, the metallographic structure of the blank may be changed, which is disadvantageous for the finished product.
After the blank is heated, the blank is vertically placed below the forging press, and because the straight pipe portions of the whole auxiliary valve body 1 are different, in order to keep the shape of the straight pipe portions, only the upper half portion of the blank is deformed, and in this embodiment, a containing groove is arranged below the forging press, the containing groove is in a basin shape, water is added into the containing groove, and the height of the water is about to exceed two thirds of the straight pipe portions of the auxiliary valve body 1, so that the lower end of the blank is not deformed, and the deformation of the upper end portion is not influenced.
Then, the forming die 2 is placed above the blank, the whole forming die 2 is bowl-shaped, 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 such circumstances, the forging press starts to work, and under the action of the forging press, the forming die 2 continuously moves downwards, so that the upper end of the blank is unfolded to form a bowl-shaped structure of the auxiliary valve body 1, and it should be noted that, in order to facilitate the pressing and demolding of the forming die 2, in this embodiment, graphite oil is coated on the surface of the forming die 2, so that the resistance is reduced. Thus, under the action of the forming die 2, the whole process can be formed in one step, while the traditional forging process needs multiple forging and pressing, and the forming can be performed under the condition of reciprocating forging and pressing.
Since the whole blank is compression molded, there is no extra thickness in the bowl-shaped structure and the straight tube portion for cutting, and therefore, in order to omit the cutting process, in this embodiment, the portion of the conventional auxiliary valve body 1 is separately machined by adopting a machining mode, and due to the structure, the conventional auxiliary valve body can be matched with a small portion of machining by adopting a twisting and pressing mode. In this embodiment, this is designated as a sub-valve body seal 3.
For better with vice valve body sealing washer 3 and compression molding's blank welding together, in this embodiment, vice valve body sealing washer 3 is annular setting and the one side that the sealing washer is close to the blank is the arc surface breach form setting, like this, both contact surfaces can laminate, and in order to weld both, because vice valve body sealing washer 3 welded surface is right angle face, like this, the welding quantity is great, can further ensure both stability, make it reach the performance of forging piece, like this, the vice valve body sealing washer 3 of independent processing, its processing quantity is little and its weight is far lower than the vice valve body 1 of current forging, do not need large-scale machining equipment can accomplish, the manufacturing cost of reduction.
And after the two are welded, the spherical fixed ball valve auxiliary valve body 1 can be obtained.
In the whole process, the material consumption is greatly reduced, the processing amount and the processing times are obviously reduced, the working efficiency is further improved, the production cost is reduced, and the market competitiveness is improved.
The present application is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present application without departing from the technical content of the present application still belong to the protection scope of the technical solution of the present application.
Claims (6)
1. The production process of the spherical fixed ball valve auxiliary valve body is characterized by comprising the following effective steps of:
a. firstly, selecting a proper steel plate according to the thickness of a to-be-processed auxiliary valve body and the inner diameter of a straight pipe part;
b. the method comprises the steps of (1) rolling and welding a steel plate into a cylinder shape to obtain a blank;
c. heating the blank, and vertically placing the blank below a forging press after the heating is completed;
d. cooling the bottom of the blank, and placing a forming die above the blank;
e. pressing down by a forging press, and forging and forming by a forming die for standby;
f. machining a sealing ring of the auxiliary valve body;
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. The process for producing a ball valve sub-body according to claim 1, wherein in the step c, the blank is heated to 900 ℃ ± 20 ℃.
4. The process for producing the auxiliary valve body of the spherical fixed ball valve according to 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 the auxiliary valve body of the spherical fixed ball valve according to claim 1, wherein the forming die is bowl-shaped.
6. The production process of the spherical fixed ball valve auxiliary valve body according to claim 1, wherein the auxiliary valve body sealing ring is arranged in an annular shape, and one surface of the sealing ring, which is close to a 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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| Publication Number | Publication Date |
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| CN113878318A CN113878318A (en) | 2022-01-04 |
| CN113878318B true 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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| CN113878318A (en) | 2022-01-04 |
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