CN111531117A - Machining process of ball valve housing and ball valve housing - Google Patents
Machining process of ball valve housing and ball valve housing Download PDFInfo
- Publication number
- CN111531117A CN111531117A CN202010365146.1A CN202010365146A CN111531117A CN 111531117 A CN111531117 A CN 111531117A CN 202010365146 A CN202010365146 A CN 202010365146A CN 111531117 A CN111531117 A CN 111531117A
- Authority
- CN
- China
- Prior art keywords
- control head
- hole
- cap column
- ball valve
- cold header
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003754 machining Methods 0.000 title claims abstract description 9
- 239000007769 metal material Substances 0.000 claims abstract description 28
- 238000004080 punching Methods 0.000 claims abstract description 16
- 239000000047 product Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000010330 laser marking Methods 0.000 claims abstract description 8
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims abstract description 7
- 238000010079 rubber tapping Methods 0.000 claims abstract description 4
- 239000011265 semifinished product Substances 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 4
- 208000037656 Respiratory Sounds Diseases 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000003915 air pollution Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 201000009240 nasopharyngitis Diseases 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/26—Making machine elements housings or supporting parts, e.g. axle housings, engine mountings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/20—Making machine elements valve parts
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Housings (AREA)
Abstract
The invention relates to the field of valve accessory processing, in particular to a ball valve shell and a processing technology thereof. The method comprises the following steps: 1) selecting a metal material, and processing the metal material into a through cap column with an inner hole through a cold header; 2) processing a positioning hole and a thread on the through cap column by using a numerical control lathe; 3) selecting a metal material and processing the metal material into a control head with a through hole through a cold header; 4) punching the control head out of the switch positioning groove by using a punch; 5) the through hole of the control head corresponds to the positioning hole of the through cap column, and the control head is welded with the through cap column through a laser welding machine to form a semi-finished product of the ball valve shell; 6) performing finish machining and thread tapping on the via hole of the control head through a numerical control lathe; 7) and (4) carrying out laser marking on the blank of the ball valve shell in the step (4) through a laser marking machine to form a finished product of the ball valve shell.
Description
Technical Field
The invention relates to the field of valve accessory processing, in particular to a ball valve shell and a processing technology thereof.
Background
The ball valve casing is the indispensable important component part of valve, the ball valve casing is including the casing body, set up the flange on the casing body, traditional technology is through mould casting shaping with casing and flange, in the casting process, pour into the mould roasting with the metal liquid earlier, solidify into the blank through the cooling, then will repair the blank and subtract, processing is consuming time, the inside gas pocket that easily appears of cast moulding ball valve, the shrinkage cavity, the sand eye, the waste material that produces is many, the inside tissue of cast moulding is loose, the internal stress is big, it is not long to produce crackle life easily, and in the production and processing, need processes such as high temperature calcination, produce a large amount of waste gas, and is not environment-friendly.
Disclosure of Invention
In order to overcome the defects of the background art, the invention aims to provide a ball valve shell and a machining process thereof, wherein the machining process of the ball valve shell is capable of reducing cost and waste materials.
The technical scheme adopted by the invention is as follows: a processing technology of a ball valve shell comprises the following steps:
2) selecting a metal material, and processing the metal material into a through cap column with an inner hole through a cold header;
2) processing a positioning hole and a thread on the through cap column by using a numerical control lathe;
3) selecting a metal material and processing the metal material into a control head with a through hole through a cold header;
4) punching the control head out of the switch positioning groove by using a punch;
5) the through hole of the control head corresponds to the positioning hole of the through cap column, and the control head is welded with the through cap column through a laser welding machine to form a semi-finished product of the ball valve shell;
6) performing finish machining and thread tapping on the via hole of the control head through a numerical control lathe;
7) and (4) carrying out laser marking on the blank of the ball valve shell in the step (4) through a laser marking machine to form a finished product of the ball valve shell.
Preferably, the processing steps of the through cap column in the step 1 are as follows:
1) preparing materials, namely selecting a strip-shaped metal material to feed the material into a cold header and arranging the material through a first station of the cold header to form a cylindrical metal section;
2) roughly drawing the cylindrical metal section after arrangement through a second station of the cold header to form a through cap column blank with a lower connector at the bottom, wherein the diameter of the lower connector is larger than that of the cylindrical metal section;
3) pre-stretching the through-cap column blank through a third station of the cold header to enable an inner hole to be formed between one end, connected with the lower connector, of the cylindrical metal section and the connector;
4) performing the pre-stretched through cap column blank through a fourth station of the cold header to ensure that the top of the cylindrical metal section is provided with an upper connector with the diameter smaller than that of the cylindrical metal section, and inner holes of the upper connector, the cylindrical metal section and the lower connector are communicated;
5) forming the preformed through-cap column blank by a fifth station of a cold header;
6) punching the formed through cap column finished product through a sixth station of the cold header to promote the conduction of inner holes in the upper connector, the cylindrical metal section and the lower connector to form the through cap column finished product;
7) and punching a positioning hole on the side surface of the finished product of the through cap column with the punched inner hole.
Preferably, the processing steps of the control head in step 3 are as follows:
1) preparing materials, namely selecting a strip-shaped metal material to feed the metal material into a cold header and arranging the metal material through a first station;
2) upsetting the control head through a second station of the cold header to enable the diameter of one end of the control head to be larger than that of the other end of the control head;
3) flattening the upset control head through a third station of the cold header to enable the thicker end to form a flange;
4) preforming the flat flange through a fourth station of the cold header, and respectively upsetting holes at two ends of the control head;
5) forming a control head for upsetting a hole through a fifth station of a cold header to promote the inner diameter of the hole to be deepened;
6) punching the control head through a sixth station of the cold header to promote the formation of the conducting hole;
7) and punching and shearing the formed control head through a punch to form the control head with convex strips on the surface, and forming a switch positioning groove between the adjacent convex strips.
The utility model provides a ball valve case, is equipped with the hole including leading to the cap post and locating the control head on leading to the cap post in leading to the cap post, leads to cap post side and is equipped with the locating hole, the control head on be equipped with the conducting hole that switches on with locating hole and hole, the conducting hole of control head correspond with the locating hole that leads to the cap post and the control head with lead to the cap post welding.
Preferably, the outer surface of the control head is provided with a plurality of convex strips protruding out of the outer surface of the control head, and a switch positioning groove is formed between every two adjacent convex strips.
Preferably, the top of the through cap column is provided with an upper connector with a diameter smaller than that of the through cap column, and the bottom of the through cap column is provided with a lower connector with a diameter larger than that of the through cap column.
The invention has the beneficial effects that: lead to the cap post and the control head earlier respectively through cold heading machine cold-heading shaping, the process velocity is fast, and to different models, need not make the mould of various differences, lead to the cap post and the control head cold-heading shaping back, lead to the cap post that the cold-heading came out and pass through welding machine weld forming with the control head again, can reduce the production of waste material like this, the cost is saved, the casing that the cold-heading came out can not ejection of compact sand eye, phenomenons such as gas pocket, than casting process, the casing that the cold-heading came out is difficult for producing the crackle, long service life, and the cold heading machine does not produce waste gas almost, reduce air pollution, compare original technology through casting, the process velocity is fast, can reduce cost and environmental protection more.
The embodiments of the present invention will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a flow chart of the processing technique of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a front view of the present invention;
fig. 4 is a structural view of the present invention.
Detailed Description
As shown in fig. 1, the present invention provides a process for manufacturing a ball valve housing, which comprises the following steps:
3) selecting a metal material, and processing the metal material into a through cap column with an inner hole through a cold header;
2) processing a positioning hole and a thread on the through cap column by using a numerical control lathe;
3) selecting a metal material and processing the metal material into a control head with a through hole through a cold header;
4) punching the control head out of the switch positioning groove by using a punch;
5) the through hole of the control head corresponds to the positioning hole of the through cap column, and the control head is welded with the through cap column through a laser welding machine to form a semi-finished product of the ball valve shell;
6) performing finish machining and thread tapping on the via hole of the control head through a numerical control lathe;
7) and (4) carrying out laser marking on the blank of the ball valve shell in the step (4) through a laser marking machine to form a finished product of the ball valve shell.
The processing steps of the through cap column in the step 1 are as follows:
1) preparing materials, namely selecting a strip-shaped metal material to feed the material into a cold header and arranging the material through a first station of the cold header to form a cylindrical metal section;
2) roughly drawing the cylindrical metal section after arrangement through a second station of the cold header to form a through cap column blank with a lower connector at the bottom, wherein the diameter of the lower connector is larger than that of the cylindrical metal section;
3) pre-stretching the through-cap column blank through a third station of the cold header to enable an inner hole to be formed between one end, connected with the lower connector, of the cylindrical metal section and the connector;
4) performing the pre-stretched through cap column blank through a fourth station of the cold header to ensure that the top of the cylindrical metal section is provided with an upper connector with the diameter smaller than that of the cylindrical metal section, and inner holes of the upper connector, the cylindrical metal section and the lower connector are communicated;
5) forming the preformed through-cap column blank by a fifth station of a cold header;
6) punching the formed through cap column finished product through a sixth station of the cold header to promote the conduction of inner holes in the upper connector, the cylindrical metal section and the lower connector to form the through cap column finished product;
7) and punching a positioning hole on the side surface of the finished product of the through cap column with the punched inner hole.
The processing steps of the control head in the step 3 are as follows:
1) preparing materials, namely selecting a strip-shaped metal material to feed the metal material into a cold header and arranging the metal material through a first station;
2) upsetting the control head through a second station of the cold header to enable the diameter of one end of the control head to be larger than that of the other end of the control head;
3) flattening the upset control head through a third station of the cold header to enable the thicker end to form a flange;
4) preforming the flat flange through a fourth station of the cold header, and respectively upsetting holes at two ends of the control head;
5) forming a control head for upsetting a hole through a fifth station of a cold header to promote the inner diameter of the hole to be deepened;
6) punching the control head through a sixth station of the cold header to promote the formation of the conducting hole;
7) and punching and shearing the formed control head through a punch to form the control head with convex strips on the surface, and forming a switch positioning groove between the adjacent convex strips.
As shown in fig. 2-4, a ball valve housing includes a through cap column 1 and a control head 2 disposed on the through cap column 1, an inner hole 11 is disposed in the through cap column 1, a positioning hole 12 is disposed on a side surface of the through cap column 1, a through hole 21 communicated with the positioning hole 12 and the inner hole 11 is disposed on the control head 2, the through hole 21 of the control head 2 corresponds to the positioning hole 12 of the through cap column 1, and the control head 2 is welded to the through cap column 1.
The surface of control head 2 be equipped with a plurality of protrusions 22 of protrusion in control head 2 surface, form the switch constant head tank between the adjacent protrusion 22.
The top of the cap column 1 is provided with an upper connector 3 with a diameter smaller than that of the cap column, and the bottom of the cap column is provided with a lower connector 4 with a diameter larger than that of the cap column.
Lead to cap post 1 and control head 2 earlier respectively through cold heading machine cold-heading shaping, the process velocity is fast, and to different models, need not make the mould of various differences, lead to cap post 1 and control head 2 cold heading shaping after, lead to cap post 1 and control head 2 through welding machine weld forming with the lead to cap post 1 that the cold heading came out again, can reduce the production of waste material like this, the cost is saved, the casing that the cold heading came out can not ejection of compact sand eye, phenomenons such as gas pocket, than casting process, the casing that the cold heading came out is difficult for producing the crackle, long service life, and the cold heading machine does not produce waste gas almost, reduce air pollution, compare original technology through casting, the process velocity is fast, can reduce cost and environmental protection more.
The skilled person should understand that: although the invention has been described in terms of the above specific embodiments, the inventive concept is not limited thereto and any modification applying the inventive concept is intended to be included within the scope of the patent claims.
Claims (6)
1. The machining process of the ball valve shell is characterized in that the ball valve shell comprises the following steps:
1) selecting a metal material, and processing the metal material into a through cap column with an inner hole through a cold header;
2) processing a positioning hole and a thread on the through cap column by using a numerical control lathe;
3) selecting a metal material and processing the metal material into a control head with a through hole through a cold header;
4) punching the control head out of the switch positioning groove by using a punch;
5) the through hole of the control head corresponds to the positioning hole of the through cap column, and the control head is welded with the through cap column through a laser welding machine to form a semi-finished product of the ball valve shell;
6) performing finish machining and thread tapping on the via hole of the control head through a numerical control lathe;
7) and (4) carrying out laser marking on the blank of the ball valve shell in the step (4) through a laser marking machine to form a finished product of the ball valve shell.
2. The process for manufacturing a ball valve housing according to claim 1, wherein: the processing steps of the through cap column in the step 1 are as follows:
1) preparing materials, namely selecting a strip-shaped metal material to feed the material into a cold header and arranging the material through a first station of the cold header to form a cylindrical metal section;
2) roughly drawing the cylindrical metal section after arrangement through a second station of the cold header to form a through cap column blank with a lower connector at the bottom, wherein the diameter of the lower connector is larger than that of the cylindrical metal section;
3) pre-stretching the through-cap column blank through a third station of the cold header to enable an inner hole to be formed between one end, connected with the lower connector, of the cylindrical metal section and the connector;
4) performing the pre-stretched through cap column blank through a fourth station of the cold header to ensure that the top of the cylindrical metal section is provided with an upper connector with the diameter smaller than that of the cylindrical metal section, and inner holes of the upper connector, the cylindrical metal section and the lower connector are communicated;
5) forming the preformed through-cap column blank by a fifth station of a cold header;
6) punching the formed through cap column finished product through a sixth station of the cold header to promote the conduction of inner holes in the upper connector, the cylindrical metal section and the lower connector to form the through cap column finished product;
7) and punching a positioning hole on the side surface of the finished product of the through cap column with the punched inner hole.
3. The ball valve housing processing technology according to claim 1, wherein: the processing steps of the control head in the step 2 are as follows:
1) preparing materials, namely selecting a strip-shaped metal material to feed the metal material into a cold header and arranging the metal material through a first station;
2) upsetting the control head through a second station of the cold header to enable the diameter of one end of the control head to be larger than that of the other end of the control head;
3) flattening the upset control head through a third station of the cold header to enable the thicker end to form a flange;
4) preforming the flat flange through a fourth station of the cold header, and respectively upsetting holes at two ends of the control head;
5) forming a control head for upsetting a hole through a fifth station of a cold header to promote the inner diameter of the hole to be deepened;
6) punching the control head through a sixth station of the cold header to promote the formation of the conducting hole;
7) and punching and shearing the formed control head through a punch to form the control head with convex strips on the surface, and forming a switch positioning groove between the adjacent convex strips.
4. A ball valve housing according to claim 1, 2 or 3, comprising a through cap column and a control head disposed on the through cap column, wherein an inner hole is disposed in the through cap column, a positioning hole is disposed on a side surface of the through cap column, a via hole communicated with the positioning hole and the inner hole is disposed on the control head, the via hole of the control head corresponds to the positioning hole of the through cap column, and the control head is welded to the through cap column.
5. The ball valve housing of claim 4, wherein: the surface of control head be equipped with a plurality of protrusions in the sand grip of control head surface, form the switch constant head tank between the adjacent sand grip.
6. The ball valve housing of claim 4, wherein: the top of leading to the cap post be equipped with the diameter and be less than the last connector that leads to the cap post, the bottom is equipped with the diameter and is greater than the lower connector that leads to the cap post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010365146.1A CN111531117A (en) | 2020-04-30 | 2020-04-30 | Machining process of ball valve housing and ball valve housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010365146.1A CN111531117A (en) | 2020-04-30 | 2020-04-30 | Machining process of ball valve housing and ball valve housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111531117A true CN111531117A (en) | 2020-08-14 |
Family
ID=71970345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010365146.1A Pending CN111531117A (en) | 2020-04-30 | 2020-04-30 | Machining process of ball valve housing and ball valve housing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111531117A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112045375A (en) * | 2020-09-18 | 2020-12-08 | 项定洪 | Manufacturing process of environment-friendly valve body and product thereof |
| CN112045374A (en) * | 2020-09-18 | 2020-12-08 | 项定洪 | Manufacturing process of high-strength valve body and product thereof |
| CN112045373A (en) * | 2020-09-18 | 2020-12-08 | 项定洪 | Manufacturing process of environment-friendly butterfly valve body and product thereof |
| CN112318062A (en) * | 2020-08-28 | 2021-02-05 | 丹江口娇阳包装技术有限公司 | Production method of one-way valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09103839A (en) * | 1995-10-06 | 1997-04-22 | Musashi Seimitsu Ind Co Ltd | Production of housing for ball joint |
| US20030106216A1 (en) * | 2000-11-16 | 2003-06-12 | Masahiro Yokomi | Method of producing ball valve |
| TW200704468A (en) * | 2006-10-17 | 2007-02-01 | Ying-Zhen Huang | A fabrication method and the product of hollow ball-plug for ball valve |
| CN104175079A (en) * | 2014-08-29 | 2014-12-03 | 温州市阳泰紧固件有限公司 | Manufacturing process of ball valve for gas meter pipeline |
| CN204004542U (en) * | 2014-08-29 | 2014-12-10 | 温州市阳泰紧固件有限公司 | Single mouth ball valve |
| CN109202380A (en) * | 2018-09-30 | 2019-01-15 | 江苏天毅冷镦股份有限公司 | The whole cold upsetting production technique of automobile-used ball joint |
-
2020
- 2020-04-30 CN CN202010365146.1A patent/CN111531117A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09103839A (en) * | 1995-10-06 | 1997-04-22 | Musashi Seimitsu Ind Co Ltd | Production of housing for ball joint |
| US20030106216A1 (en) * | 2000-11-16 | 2003-06-12 | Masahiro Yokomi | Method of producing ball valve |
| TW200704468A (en) * | 2006-10-17 | 2007-02-01 | Ying-Zhen Huang | A fabrication method and the product of hollow ball-plug for ball valve |
| CN104175079A (en) * | 2014-08-29 | 2014-12-03 | 温州市阳泰紧固件有限公司 | Manufacturing process of ball valve for gas meter pipeline |
| CN204004542U (en) * | 2014-08-29 | 2014-12-10 | 温州市阳泰紧固件有限公司 | Single mouth ball valve |
| CN109202380A (en) * | 2018-09-30 | 2019-01-15 | 江苏天毅冷镦股份有限公司 | The whole cold upsetting production technique of automobile-used ball joint |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112318062A (en) * | 2020-08-28 | 2021-02-05 | 丹江口娇阳包装技术有限公司 | Production method of one-way valve |
| CN112318062B (en) * | 2020-08-28 | 2023-08-15 | 丹江口娇阳包装技术有限公司 | Production method of one-way valve |
| CN112045375A (en) * | 2020-09-18 | 2020-12-08 | 项定洪 | Manufacturing process of environment-friendly valve body and product thereof |
| CN112045374A (en) * | 2020-09-18 | 2020-12-08 | 项定洪 | Manufacturing process of high-strength valve body and product thereof |
| CN112045373A (en) * | 2020-09-18 | 2020-12-08 | 项定洪 | Manufacturing process of environment-friendly butterfly valve body and product thereof |
| CN112045375B (en) * | 2020-09-18 | 2023-01-06 | 项定洪 | Manufacturing process of environment-friendly valve body and product thereof |
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