CN111822674B - Cast tube welding ring forming device and method - Google Patents
Cast tube welding ring forming device and method Download PDFInfo
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- CN111822674B CN111822674B CN202010603042.XA CN202010603042A CN111822674B CN 111822674 B CN111822674 B CN 111822674B CN 202010603042 A CN202010603042 A CN 202010603042A CN 111822674 B CN111822674 B CN 111822674B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/04—Casting in, on, or around objects which form part of the product for joining parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
- B22D27/13—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of gas pressure
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Abstract
The invention provides a cast tube welding ring forming device and a method, belonging to the technical field of cast tube manufacturing, wherein the cast tube welding ring forming device comprises: a forming ring, a pouring nozzle and a heating coil. The molding ring is used for surrounding the periphery of the cast iron pipe and forming a pouring cavity with the outer wall of the cast iron pipe, and the top of the molding ring is provided with a pouring port and an exhaust port which are communicated with the pouring cavity; and a partition plate for separating the pouring port and the exhaust port is fixed on the inner wall of the molding ring. The pouring nozzle is arranged above the pouring gate and used for pouring molten iron into the pouring gate. And the heating coil is arranged outside the forming ring and used for preheating the forming ring. The invention also provides a method for forming the cast tube welding ring. According to the cast tube welding ring forming device and method, after the molten iron is cooled, the molten iron and the forming ring are solidified into a whole, the forming ring is a regular workpiece, subsequent processing is not needed, the operation flow and steps are reduced, and the production efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of cast tube manufacturing, and particularly relates to a cast tube welding ring forming device and method.
Background
With the fact that the ductile iron pipe is widely applied to national key water and gas transmission projects, the importance of the ductile iron pipe is increasingly prominent. The existing socket welding ring is processed through pouring, milling and the like, the operation flow is complex, and the production efficiency is low.
Disclosure of Invention
The invention aims to provide a cast tube welding ring forming device, and aims to solve the problems that a socket welding ring is complex in operation process and low in production efficiency.
In order to achieve the purpose, the invention adopts the technical scheme that: providing a cast tube weld ring forming device, comprising:
the forming ring is used for surrounding the periphery of the cast iron pipe and forming a pouring cavity with the outer wall of the cast iron pipe, and the top of the forming ring is provided with a pouring port and an exhaust port which are communicated with the pouring cavity; a partition plate for separating the pouring port and the exhaust port is fixed on the inner wall of the molding ring;
the pouring nozzle is arranged above the pouring gate and used for pouring molten iron into the pouring gate;
and the heating coil is arranged outside the forming ring and used for preheating the forming ring.
As another embodiment of the application, a drainage frame is detachably connected to the pouring gate.
As another embodiment of the present application, an exhaust pipe abuts against the exhaust port.
Another object of the present application is to provide a method for forming a welded ring of a cast tube, including:
fixing a forming ring on the cast iron pipe through a plurality of welding points, and preheating the forming ring through a heating coil;
pouring molten iron into a pouring gate at the top of the molding ring to fill the molten iron between the molding ring and the cast iron pipe;
and annealing the forming ring and the molten iron in the forming ring through the heating coil.
As another embodiment of the present application, the fixing of the forming ring to the cast iron pipe by a plurality of welding points comprises:
and sleeving the molding ring on the cast iron pipe, and fixing the molding ring on the cast iron pipe through a plurality of welding points.
As another embodiment of the present application, the preheating the forming ring by the heating coil includes:
and communicating an exhaust pipe on an exhaust port of the forming ring, and preheating the forming ring at a temperature lower than that during annealing treatment.
As another embodiment of the present application, the injecting molten iron into the sprue at the top of the forming ring to fill the molten iron between the forming ring and the cast iron pipe includes:
connecting a drainage frame on the pouring gate, and pouring the molten iron into the forming ring through the drainage frame;
and spraying high-temperature gas into the drainage frame through a heating spray gun.
As another embodiment of the present application, the annealing the forming ring together with the molten iron inside the forming ring by the heating coil includes:
when the molten iron overflows from the exhaust port, the drainage frame and the exhaust pipe are taken down; and annealing the forming ring and the molten iron in the forming ring through the heating coil.
The cast tube welding ring forming device provided by the invention has the beneficial effects that: compared with the prior art, the forming ring in the cast tube welding ring forming device is used for surrounding the periphery of the cast iron tube and forming a pouring cavity with the outer wall of the cast iron tube, and the top of the forming ring is provided with a pouring port and an exhaust port. The pouring port and the exhaust port are divided by a partition plate. The heating coil is arranged outside the forming ring. When the device is used, the heating coil is used for preheating the molding ring, molten iron is poured into the pouring gate through the pouring nozzle, and the molten iron flows into the pouring cavity and finally overflows from the exhaust port. In this application, the shaping ring is only fixed on the cast iron pipe through a plurality of welding points, treats that molten iron solidifies as an organic wholely with the shaping ring after the molten iron cooling, and the shaping ring itself is regular finished piece, need not to carry out subsequent processing, has reduced the flow and the step of operation, has improved production efficiency.
Another object of the present application is to provide a method for forming a welded ring of a cast tube, including:
fixing a forming ring on the cast iron pipe through a plurality of welding points, and preheating the forming ring through a heating coil;
pouring molten iron into a pouring gate at the top of the molding ring to fill the molten iron between the molding ring and the cast iron pipe;
and heating the forming ring and the molten iron in the forming ring through the heating coil.
As another embodiment of the present application, the fixing of the forming ring to the cast iron pipe by a plurality of welding points comprises:
and sleeving the molding ring on the cast iron pipe, and fixing the molding ring on the cast iron pipe through a plurality of welding points.
As another embodiment of the present application, the preheating the forming ring by the heating coil includes:
and communicating an exhaust pipe on an exhaust port of the forming ring, and preheating the forming ring at a temperature lower than that during annealing treatment.
As another embodiment of the present application, the injecting molten iron into the sprue at the top of the forming ring to fill the molten iron between the forming ring and the cast iron pipe includes:
connecting a drainage frame on the pouring gate, and pouring the molten iron into the forming ring through the drainage frame;
and spraying high-temperature gas into the drainage frame through a heating spray gun.
As another embodiment of the present application, the annealing the forming ring together with the molten iron inside the forming ring by the heating coil includes:
when the molten iron overflows from the exhaust port, the drainage frame and the exhaust pipe are taken down; and annealing the forming ring and the molten iron in the forming ring through the heating coil.
The method for forming the cast tube welding ring has the beneficial effects that: compared with the prior art, the method for forming the cast tube welding ring fixes the forming ring on the cast iron tube through a plurality of welding points, and preheats the forming ring through the heating coil. And injecting molten iron into the pouring gate at the top of the molding ring, so that the molten iron is filled between the molding ring and the cast iron pipe. And heating the molding ring and the molten iron in the molding ring through a heating coil. In this application, the shaping ring is only fixed on the cast iron pipe through a plurality of welding points, treats that molten iron solidifies as an organic wholely with the shaping ring after the molten iron cooling, and the shaping ring itself is regular finished piece, need not to carry out subsequent processing, has reduced the flow and the step of operation, has improved production efficiency.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a cast-tube weld-ring forming apparatus according to an embodiment of the present invention;
fig. 2 is a schematic view showing the connection between a cast iron pipe and a forming ring according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for forming a weld ring of a cast-in-place tube according to an embodiment of the present invention.
In the figure: 1. a cast iron pipe; 2. molten iron; 3. forming a ring; 4. a drainage frame; 5. an exhaust pipe; 6. and (7) welding points.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, a cast tube weld ring forming apparatus according to the present invention will now be described. Cast tube welds ring forming device includes: a forming ring 3, a pouring nozzle and a heating coil. The molding ring 3 is used for surrounding the periphery of the cast iron pipe 1 and forming a pouring cavity with the outer wall of the cast iron pipe 1, and the top of the molding ring 3 is provided with a pouring port and an exhaust port which are communicated with the pouring cavity; and a partition plate for separating a pouring port and an exhaust port is fixed on the inner wall of the molding ring 3. The pouring nozzle is arranged above the pouring gate and is used for pouring molten iron 2 into the pouring gate. The heating coil is arranged outside the forming ring 3 and used for preheating the forming ring 3.
The cast tube welding ring forming device provided by the invention has the beneficial effects that: compared with the prior art, the forming ring 3 in the cast tube welding ring forming device is used for surrounding the periphery of the cast iron tube 1 and forming a casting cavity with the outer wall of the cast iron tube 1, and the top of the forming ring 3 is provided with a casting opening and an exhaust opening. The pouring port and the exhaust port are divided by a partition plate. The heating coil is provided outside the forming ring 3. When the device is used, the molding ring 3 is preheated through the heating coil, molten iron 2 is poured into the pouring gate through the pouring nozzle, and the molten iron 2 flows into the pouring cavity and finally overflows from the exhaust port. In this application, the shaping ring 3 only fixes on cast iron pipe 1 through a plurality of welding points 6, treats that molten iron 2 solidifies as an organic whole with shaping ring 3 after molten iron 2 cools off, and shaping ring 3 itself is the rule finished piece, need not to carry out subsequent processing, has reduced the flow and the step of operation, has improved production efficiency.
In the prior art, in order to pour on the periphery of a cast iron pipe 1 and then process the cast iron pipe by a specific milling cutter, if no limiting device is arranged on the cast iron pipe 1, molten iron 2 poured on the cast iron pipe 1 is not easy to form a regular ring shape, and meanwhile, as the cast iron pipe 1 needs to rotate around the axis of the cast iron pipe 1 in the pouring process, the cast iron pipe 1 can vibrate when rotating, and the molten iron 2 flows unevenly, so that the molten iron 2 poured on the cast iron pipe 1 can deviate from the circumferential flow of the cast iron pipe 1, thereby causing problems of rework and the like. In this application, the shaping ring 3 leads to a plurality of welding points 6 to be fixed on cast iron pipe 1, carry on 6 ~ 18 spot welding of position in the time of in-service use can, need not to follow the interior edge of shaping ring 3 and carry out full weld, the process of very big reduction operation has improved intensity of labour. The melting point of the welding spot is higher than the temperature of the molten iron 2, and the inner edge of the molding ring 3 is attached to the periphery of the cast iron pipe 1, so that the overflow of the molten iron 2 can be prevented.
Referring to fig. 1, a flow guiding frame 4 is detachably connected to the pouring gate as a specific embodiment of the cast tube welded ring forming apparatus provided by the present invention. The molding ring 3 is an annular part, and the molding ring 3 is a prefabricated component, and the inner edge of the molding ring is attached to the cast iron pipe 1. A plurality of welding points 6 on the forming ring 3 are evenly distributed along the circumferential direction of the forming ring 3. Because inhomogeneous when molten iron 2 flows, can't guarantee at the in-process of pouring and stabilize trickling, can dismantle to be connected with drainage frame 4 on the pouring gate for this reason, drainage frame 4's bottom joint is on the pouring gate, and the top is uncovered setting to the cross section of drainage frame 4 inner chamber increases progressively from bottom to top, and drainage frame 4's appearance is the finished piece of loudspeaker form, and its main effect is in 3 with molten iron 2 drainage to shaping ring. The inner wall of the drainage frame 4 is provided with a ceramic coating, and the whole drainage frame 4 can also be a ceramic product. After the molten iron 2 is poured, the drainage frame 4 is pulled out from the top of the forming ring 3, and the drainage frame 4 can be repeatedly used. The molten iron 2 is made of nodular cast iron, and expands during cooling, so that cracks are avoided.
Referring to fig. 1, an exhaust pipe 5 is abutted on the exhaust port as an embodiment of the apparatus for forming a welded ring of a cast tube according to the present invention. Because the fluidity of the molten iron 2 is poor, the cross section of a pouring cavity formed by the molding ring 3 and the cast iron pipe 1 is small, and the pouring gate and the exhaust port are both arranged at the top of the molding ring 3, the molten iron 2 needs to be poured from the pouring gate and turned back from the exhaust port, the flowing distance is long, and the corner is large. Therefore, the molten iron 2 can move to the exhaust port, the exhaust pipe 5 is abutted to the exhaust port, the exhaust pipe 5 is communicated with the exhaust fan, the exhaust pipe 5 is covered on the exhaust port, and the molten iron 2 is promoted to flow in the casting cavity through negative pressure generated in the casting cavity by the exhaust pipe 5. In the in-service use process, because be connected with the baffle between sprue gate and the gas vent, under exhaust column 5's effect, can produce the negative pressure at the sprue gate, if molten iron 2 temperature does not reduce, under exhaust column 5's negative pressure's effect, can increase molten iron 2's mobility, nevertheless because sprue gate department air flow increases, molten iron 2 cooling with higher speed can be accelerated, thereby make mobility decline, for this reason the mountable heating spray gun, the heating spray gun sets up towards the import of drainage frame 4, can heat the gas that gets into the pouring cavity on the one hand through starting the heating spray gun, on the other hand also can promote in the drainage frame 4 through the gas from heating spray gun spun 2 inflow, thereby guarantee its mobility.
Another objective of the present application is to provide a method for forming a welded ring of a cast-in-place tube, please refer to fig. 3, which includes the following steps:
the forming ring 3 is fixed on the cast iron pipe 1 by a plurality of welding points 6, and the forming ring 3 is preheated by a heating coil.
And injecting molten iron 2 into a pouring gate at the top of the molding ring 3, so that the molten iron 2 is filled between the molding ring 3 and the cast iron pipe 1.
The molding ring 3 is heated together with the molten iron 2 inside the molding ring 3 by a heating coil.
As a specific embodiment of the method for forming a welded ring of a cast iron pipe according to the present invention, the fixing of the forming ring 3 to the cast iron pipe 1 by the plurality of welding points 6 includes:
the molding ring 3 is sleeved on the cast iron pipe 1, and the molding ring 3 is fixed on the cast iron pipe 1 through a plurality of welding points 6.
In this application, the interior edge laminating of shaping ring 3 is on cast iron pipe 1, and shaping ring 3 is provided with the portion of bending, and when using first the suit of shaping ring 3 is on cast iron pipe 1 to make the spot welding through a plurality of positions between the interior edge of shaping ring 3 and cast iron pipe 1. Another advantageous effect of the present application is that the molten iron 2 is directly poured on the outer circumference of the cast iron pipe 1 in the prior art, and then is subjected to subsequent processes by a milling cutter or the like. The milling cutter is used for processing an iron ring which is poured on the periphery of the cast iron pipe 1 and is cooled, the iron ring which is poured on the periphery of the cast iron pipe 1 is irregular in shape due to vibration, shaking in a molten iron 2 bag and the like in the pouring process of molten iron 2, the molten iron 2 can be unfolded outwards after contacting the cast iron pipe 1, the iron ring which is formed after cooling is flat, the milling cutter is more applied to two side edges of an iron flow, if the thickness of the iron flow is to be increased, multiple pouring is needed, the operation is inconvenient, and the structure of the finally formed iron ring is not flat and uniform. The casting iron pipe 1 with the same outer diameter can be sleeved with the molding rings 3 with different shapes and different rules, as the inner walls of the molding rings 3 and the casting iron pipe 1 are surrounded to form the casting cavities, and the molten iron 2 can be injected into the casting cavities with different shapes, the design has the advantages that the molding rings 3 with different shapes can be sleeved on the periphery of the casting iron pipe 1, the cross sections of the molding rings 3 can be different, so that the molten iron 2 poured into the molding rings 3 can be solidified into different shapes due to the different molding rings 3, and the casting iron pipe can be applied to different use scenes.
As a specific embodiment of the method for forming a welded ring of a cast tube provided by the present invention, preheating the forming ring 3 by the heating coil includes:
and communicating the exhaust pipe 5 with an exhaust port of the forming ring 3, and preheating the forming ring 3 at a temperature lower than that during annealing treatment.
In this application, need can preheat shaping ring 3 through heating coil before pouring molten iron 2, heating coil is less than the temperature when annealing to the temperature that shaping ring 3 preheated for molten iron 2 and the shaping ring 3 contact after preheating, avoid molten iron 2 and 3 contacts of lower temperature shaping ring to take place to cool off and mobility is relatively poor, hinder molten iron 2 further flow. Because the cast iron pipe 1 has poor fluidity, in order to avoid the molten iron 2 from being blocked in the forming ring 3, the forming ring 3 can be continuously heated by the heating coil in the pouring process of the molten iron 2.
As a specific embodiment of the method for forming a welded ring of a cast iron pipe provided by the present invention, the step of pouring molten iron 2 into a pouring gate at the top of a forming ring 3 to fill the molten iron 2 between the forming ring 3 and the cast iron pipe 1 comprises:
and a pouring port is connected with a drainage frame 4, and molten iron 2 is poured into the forming ring 3 through the drainage frame 4.
High-temperature gas is sprayed into the drainage frame 4 through the heating spray gun.
In this application, can be at the tip connection sealed pad of exhaust column 5, sealed pad is the aluminium silicate cotton felt. The sealing gasket is used for improving the sealing performance of the exhaust pipe 5 and the forming ring 3. In the actual production process, the cast iron pipe 1 is placed on a supporting roll, the supporting roll positions the cast iron pipe 1, and the supporting roll only supports the cast iron pipe 1 and does not need to drive the cast iron pipe 1 to rotate. The heating spray gun sets up in the top of drainage frame 4, and the heating spray gun produces high temperature when burning to send out high temperature burning tail gas, get into the inside of shaping ring 3 with the help of exhaust column 5 at the burning tail gas of the negative pressure high temperature that the sprue gate produced, promote the flow of molten iron 2.
As a specific embodiment of the method for forming a welded ring of a cast tube provided by the present invention, the annealing treatment of the forming ring 3 and the molten iron 2 inside the forming ring 3 by the heating coil includes:
when the molten iron 2 overflows from the exhaust port, the drainage frame 4 and the exhaust pipe 5 are taken down; and annealing the molding ring 3 and the molten iron 2 in the molding ring 3 through a heating coil.
In this application, with 4 joints of drainage frame on the sprue gate, pour into a mould molten iron 2 in to drainage frame 4 through the pouring nozzle, after the pouring is accomplished, dismantle drainage frame 4 and exhaust column 5 back, carry out annealing treatment to shaping ring 3 and the inside molten iron 2 of shaping ring 3 through heating coil, because the temperature is lower relatively when moving back the aftertreatment, consequently when annealing treatment, the inner wall of shaping ring 3 still is connected closely with molten iron 2.
The method for forming the cast tube welding ring has the beneficial effects that: compared with the prior art, the method for forming the welding ring of the cast tube fixes the forming ring 3 on the cast iron tube 1 through a plurality of welding points 6, and preheats the forming ring 3 through the heating coil. And injecting molten iron 2 into a pouring gate at the top of the molding ring 3, so that the molten iron 2 is filled between the molding ring 3 and the cast iron pipe 1. The molding ring 3 is heated together with the molten iron 2 inside the molding ring 3 by a heating coil. In this application, the shaping ring 3 only fixes on cast iron pipe 1 through a plurality of welding points 6, treats that molten iron 2 solidifies as an organic whole with shaping ring 3 after molten iron 2 cools off, and shaping ring 3 itself is the rule finished piece, need not to carry out subsequent processing, has reduced the flow and the step of operation, has improved production efficiency.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. Cast tube welds ring forming device, its characterized in that includes:
the forming ring is used for surrounding the periphery of the cast iron pipe and forming a pouring cavity with the outer wall of the cast iron pipe, and the top of the forming ring is provided with a pouring port and an exhaust port which are communicated with the pouring cavity; a partition plate for separating the pouring port and the exhaust port is fixed on the inner wall of the molding ring; the forming ring is fixed on the cast iron pipe through spot welding and is used for forming an integral structure with a welding ring poured by molten iron;
the pouring nozzle is arranged above the pouring gate and used for pouring molten iron into the pouring gate;
the heating coil is arranged outside the forming ring and used for preheating the forming ring;
the heating coil is used for heating the forming ring and the molten iron during pouring; the heating coil is used for heating and annealing the forming ring and the molten iron in the forming ring.
2. The apparatus according to claim 1, wherein a flow-directing frame is removably attached to the nozzle.
3. The apparatus according to claim 2, wherein an exhaust pipe abuts against the exhaust port.
4. The cast tube weld ring forming method adopts the cast tube weld ring forming device as claimed in claim 1, and is characterized by comprising the following steps:
fixing a forming ring on the cast iron pipe through a plurality of welding points, and preheating the forming ring through a heating coil;
pouring molten iron into a pouring gate at the top of the molding ring to fill the molten iron between the molding ring and the cast iron pipe;
and heating the forming ring and the molten iron in the forming ring through the heating coil.
5. The method of claim 4, wherein said fixing the forming ring to the cast iron pipe by a plurality of weld points comprises:
and sleeving the molding ring on the cast iron pipe, and fixing the molding ring on the cast iron pipe through a plurality of welding points.
6. The method of forming a cast on pipe weld ring of claim 4, wherein the preheating the forming ring by the heating coil comprises:
and communicating an exhaust pipe on an exhaust port of the forming ring, and preheating the forming ring at a temperature lower than that during annealing treatment.
7. The method for forming a weld ring of a cast iron pipe according to claim 6, wherein the step of pouring molten iron into the pouring gate at the top of the forming ring to fill the space between the forming ring and the cast iron pipe comprises the steps of:
connecting a drainage frame on the pouring gate, and pouring the molten iron into the forming ring through the drainage frame;
and spraying high-temperature gas into the drainage frame through a heating spray gun.
8. The method for forming a weld ring of a cast-in-place tube according to claim 7, wherein the annealing the forming ring together with the molten iron inside the forming ring by the heating coil comprises:
when the molten iron overflows from the exhaust port, the drainage frame and the exhaust pipe are taken down; and annealing the forming ring and the molten iron in the forming ring through the heating coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010603042.XA CN111822674B (en) | 2020-06-29 | 2020-06-29 | Cast tube welding ring forming device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010603042.XA CN111822674B (en) | 2020-06-29 | 2020-06-29 | Cast tube welding ring forming device and method |
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| CN111822674A CN111822674A (en) | 2020-10-27 |
| CN111822674B true CN111822674B (en) | 2022-03-04 |
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| CN202010603042.XA Active CN111822674B (en) | 2020-06-29 | 2020-06-29 | Cast tube welding ring forming device and method |
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| CN1923410A (en) * | 2006-09-01 | 2007-03-07 | 石家庄中煤装备制造有限公司 | Manufacturing technique of double-flange spheroidal graphite cast-iron pipe |
| RU2393052C1 (en) * | 2008-11-24 | 2010-06-27 | Автономная некоммерческая организация "Головной аттестационный центр средневолжского региона по сварочному производству" | Method of jointing pipes together |
| CN103962741A (en) * | 2014-05-20 | 2014-08-06 | 新兴铸管股份有限公司 | Automatic forming device for welding ring of cast tube |
| CN204036618U (en) * | 2014-09-05 | 2014-12-24 | 梅县梅雁旋窑水泥有限公司 | For the mould of coal rifle high-temperature-resistant layer cast |
| CN205834131U (en) * | 2016-04-14 | 2016-12-28 | 共享铸钢有限公司 | A kind of cast cooling system of high-carbon steel thin-wall annular cast |
| CN206605009U (en) * | 2017-04-01 | 2017-11-03 | 济南圣泉集团股份有限公司 | Annular cast running gate system |
| CN208529402U (en) * | 2018-03-23 | 2019-02-22 | 陈志宇 | A kind of disposal pouring multipurpose steel reinforced concrete pool production mould |
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2020
- 2020-06-29 CN CN202010603042.XA patent/CN111822674B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1923410A (en) * | 2006-09-01 | 2007-03-07 | 石家庄中煤装备制造有限公司 | Manufacturing technique of double-flange spheroidal graphite cast-iron pipe |
| RU2393052C1 (en) * | 2008-11-24 | 2010-06-27 | Автономная некоммерческая организация "Головной аттестационный центр средневолжского региона по сварочному производству" | Method of jointing pipes together |
| CN103962741A (en) * | 2014-05-20 | 2014-08-06 | 新兴铸管股份有限公司 | Automatic forming device for welding ring of cast tube |
| CN204036618U (en) * | 2014-09-05 | 2014-12-24 | 梅县梅雁旋窑水泥有限公司 | For the mould of coal rifle high-temperature-resistant layer cast |
| CN205834131U (en) * | 2016-04-14 | 2016-12-28 | 共享铸钢有限公司 | A kind of cast cooling system of high-carbon steel thin-wall annular cast |
| CN206605009U (en) * | 2017-04-01 | 2017-11-03 | 济南圣泉集团股份有限公司 | Annular cast running gate system |
| CN208529402U (en) * | 2018-03-23 | 2019-02-22 | 陈志宇 | A kind of disposal pouring multipurpose steel reinforced concrete pool production mould |
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| Publication number | Publication date |
|---|---|
| CN111822674A (en) | 2020-10-27 |
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