CN212042647U

CN212042647U - Airtight cover for casting 1Cr17Ni2 or 5CrNiMoV molten steel

Info

Publication number: CN212042647U
Application number: CN202020718708.1U
Authority: CN
Inventors: 钱德桥; 钱强; 常立忠
Original assignee: Maanshan Zhongqiao Metal Materials Co ltd
Current assignee: Maanshan Zhongqiao Metal Materials Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-12-01
Anticipated expiration: 2030-04-30

Abstract

The utility model belongs to the technical field of metallurgical casting, and relates to an airtight cover for casting 1Cr17Ni2 or 5CrNiMoV molten steel; the utility model comprises a cover body shell, wherein the top of the cover body shell is provided with a water gap accommodating hole, and the bottom of the cover body shell is provided with a casting accommodating hole; an upper blowing pipe and a lower blowing pipe are arranged in the cover body shell, the blowing direction of the upper blowing pipe is inclined upwards, the blowing direction of the lower blowing pipe is inclined downwards, the upper blowing pipe is connected with an air source through an upper vent pipe, and the lower blowing pipe is connected with the air source through a lower vent pipe; the utility model can effectively seal the gap by the upper blowing pipe with the upward inclined blowing direction and the lower blowing pipe with the downward inclined blowing direction, thereby avoiding the contact between oxygen in the air and molten steel in the casting process; and this kind of atmoseal mode makes mouth of a river accommodation hole and casting accommodation hole can leave great space, and butt joint precision requires lowly when casting, improves maneuverability.

Description

Airtight cover for casting 1Cr17Ni2 or 5CrNiMoV molten steel

Technical Field

The utility model belongs to the technical field of the metallurgical casting, more specifically say, relate to one kind and can be used to 1Cr17Ni2 or 5CrNiMoV molten steel casting airtight cover.

Background

The 1Cr17Ni2 series is a steel type of martensitic stainless steel with better matching of strength and toughness. It has good corrosion resistance to aqueous solutions of oxidizing acids, most organic acids and organic salts. It is suitable for manufacturing parts such as shafts, piston rods, pumps and the like which need to have toughness and corrosion resistance in the industries of nitric acid and acetic acid production, light industry, textile and the like. The 5CrNiMoV is high-wear-resistance hot forging die steel and has the following component design characteristics: good toughness, high strength and good wear resistance; the die steel produced by adopting an Electric Arc Furnace (EAF), refining (LT) and Vacuum (VD) has high purity and good performance.

The steel grades have excellent performances and are widely applied to specific fields, but the steel grades have higher requirements on inclusions in the actual production process, and particularly, oxygen in the air easily enters molten steel in the casting process at present, so that inclusions appear in casting blanks and the performances of the steel are influenced.

Through retrieval, the patent 'a die casting argon protection device' (publication number: CN208390997U) discloses a device comprising a device main body and a casting die, wherein the top of the device main body is convexly provided with a protective plate, a sliding water gap is formed in the protective plate, a gas injection gap is formed between the protective plate and the device main body, the device main body integrally adopts a double-layer design to form an argon protection cover, the top of the argon protection cover is provided with a spray hole, the surface of the bottom of the device main body is connected with an argon inlet pipe, a valve is arranged on the argon inlet pipe, the top of the casting die is fixedly connected with the bottom of the device main body, a filling layer is arranged between the casting die and the device main body, and; the technical scheme that this patent is disclosed uses argon gas as the protective medium, can completely cut off oxygen and avoid molten steel secondary oxidation's work to a certain extent, but the problem lies in for the atmoseal effect, argon gas safety cover and mould formula design as an organic whole, need dock like this in the casting process, have improved the casting degree of difficulty greatly, improve operation process's danger.

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

Aiming at the technical problem that air is easy to enter molten steel in the casting process of the existing equipment, the airtight cover for casting the 1Cr17Ni2 or 5CrNiMoV molten steel is provided, and the multilayer blowing pipe in the airtight cover is arranged, so that the oxygen in the air is kept isolated in the molten steel casting process, and the influence on the steel is avoided.

2. Technical scheme

In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:

the utility model provides a 1Cr17Ni2 or 5CrNiMoV molten steel casting airtight cover, which comprises a cover body shell, wherein the top of the cover body shell is provided with a water gap accommodating hole, and the bottom of the cover body shell is provided with a casting accommodating hole; be provided with upper injection pipe and lower injection pipe in the cover body shell, the jetting direction tilt up of upper injection pipe sets up, and the jetting direction tilt down of lower injection pipe sets up, and upper injection pipe links to each other with the air supply through upper vent pipe, and lower injection pipe passes through lower vent pipe and links to each other with the air supply.

Preferably, the paraffin is arranged on the inner side wall of the cover body shell, and the paraffin is uniformly arranged on the inner side wall of the cover body shell along the circumferential direction.

Preferably, refractory wool is arranged on the top of the cover body shell along the periphery of the water gap accommodating hole.

Preferably, the inclination angle of the upper blowing pipe to the horizontal plane is 30 to 60 degrees, and the inclination angle of the lower blowing pipe to the horizontal plane is 30 to 60 degrees.

Preferably, the upper injection pipes are arranged in plurality and are uniformly arranged along the circumferential direction inside the housing shell.

Preferably, the lower blowing pipes are arranged in plurality, and the lower blowing pipes are uniformly arranged along the circumferential direction in the housing shell.

Preferably, the upper blowing pipe is provided with at least two layers in a height direction.

Preferably, the lower blowing pipe is provided with at least two layers in a height direction.

Preferably, the paraffin is arranged on the side wall of the inner upper part of the cover body shell, and the height of the paraffin in the height direction is 1/3-1/2 of the whole height of the cover body shell.

Preferably, the inner side wall of the cover body shell is provided with a fixing piece protruding out of the side wall, and the paraffin is fixed on the fixing piece.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a molten steel casting airtight cover for 1Cr17Ni2 or 5CrNiMoV, which comprises a cover body shell, wherein the top of the cover body shell is provided with a water gap accommodating hole, and the bottom of the cover body shell is provided with a casting accommodating hole; an upper blowing pipe and a lower blowing pipe are arranged in the cover body shell, the blowing direction of the upper blowing pipe is inclined upwards, the blowing direction of the lower blowing pipe is inclined downwards, the upper blowing pipe is connected with an air source through an upper vent pipe, and the lower blowing pipe is connected with the air source through a lower vent pipe; the gap can be effectively sealed by air through the upper blowing pipe with the upward inclined blowing direction and the lower blowing pipe with the downward inclined blowing direction, so that the contact between oxygen in the air and molten steel in the casting process is avoided; and this kind of atmoseal mode makes mouth of a river accommodation hole and casting accommodation hole can leave great space, and butt joint precision requires lowly when casting, improves maneuverability.

(2) The utility model discloses a can be used to 1Cr17Ni2 or 5CrNiMoV molten steel casting airtight cover, is provided with paraffin on the inside lateral wall of the cover body shell, paraffin evenly sets up in the inside lateral wall of the cover body shell along the circumferencial direction; due to the arrangement of the paraffin, the paraffin in the cover body shell can be kept to be combusted in the casting process, residual oxygen in the cover body shell is consumed, and the influence on the quality of steel caused by the oxygen entering molten steel is further avoided.

Drawings

FIG. 1 is a schematic view of a device for casting an airtight cover on molten steel of 1Cr17Ni2 or 5CrNiMoV according to the present invention;

FIG. 2 is a schematic view of the use state of the airtight cover for casting molten steel of 1Cr17Ni2 or 5CrNiMoV according to the present invention;

the reference numbers in the figures illustrate:

600. a cover body housing; 601. a nozzle receiving hole; 602. casting the accommodating hole; 610. refractory cotton; 620. the bottom of the cover body;

710. an upper blowing pipe; 711. an upper vent pipe; 720. a lower blowing pipe; 721. a lower vent pipe;

801. a ladle; 802. casting a water gap; 803. a ingot casting device; 810. a fixing member; 820. paraffin wax.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

The airtight cover for casting 1Cr17Ni2 or 5CrNiMoV molten steel of the present embodiment includes, as shown in fig. 1, a cover body housing 600, a nozzle accommodating hole 601 formed at the top of the cover body housing 600, and a casting accommodating hole 602 formed at the cover body bottom 620 of the cover body housing 600; during casting, as shown in the use state diagram of fig. 2, the casting nozzle 802 of the ladle 801 is inserted into the nozzle accommodating hole 601 from the top of the cover body housing 600, so that the casting accommodating hole 602 of the cover body bottom 620 surrounds the molten steel inlet of the ingot casting device 803, and the molten steel in the ladle 801 flows into the molten steel inlet of the ingot casting device 803 from the casting nozzle 802 through the interior of the cover body housing 600.

In this embodiment, the top of the cover body housing 600 is provided with refractory wool 610 along the periphery of the nozzle receiving hole 601, and the refractory wool 610 contacts the bottom of the ladle 801 during casting, so that the insulating effect can be achieved to a certain extent. In this embodiment, the cover body housing 600 is formed by two separable half shells, and when casting, the two separated half shells are combined to surround the molten steel inlet of the casting nozzle 802 and the ingot casting device 803 of the ladle 801, and then the lifting component drives the cover body housing 600 to move upwards, so that the refractory wool 610 at the top of the cover body housing 600 contacts the bottom of the ladle 801, and then the molten steel can be released.

In order to ensure the air seal effect, an upper blowing pipe 710 and a lower blowing pipe 720 are arranged in the cover body casing 600, the blowing direction of the upper blowing pipe 710 is inclined upwards, the blowing direction of the lower blowing pipe 720 is inclined downwards, the upper blowing pipe 710 is connected with an air source through an upper vent pipe 711, and the lower blowing pipe 720 is connected with the air source through a lower vent pipe 721. In the casting process, the obliquely arranged upper injection pipe 710 obliquely and upwardly injects argon gas, and the obliquely and upwardly injects argon gas to seal the gap between the top of the cover body shell 600 and the casting nozzle 802; the lower blowing pipe 720 which is arranged obliquely blows argon gas obliquely downwards, and the argon gas obliquely downwards blows the argon gas to seal the gap between the bottom 620 of the cover body and the ingot casting device 803. In this embodiment, the inclination angle of the upper blowing pipe 710 to the horizontal plane is 30 to 60 °, and the inclination angle of the lower blowing pipe 720 to the horizontal plane is 30 to 60 °.

In addition, a plurality of upper blowing pipes 710 and a plurality of lower blowing pipes 720 are respectively arranged, and the upper blowing pipes 710 are uniformly arranged along the circumferential direction inside the cover body casing 600; so as to ensure the uniformity of argon blowing of the blowing pipe and the uniformity of the air seal effect. And the upper blowing pipe 710 and the lower blowing pipe 720 are at least provided with two layers in the height direction, and the arrangement of the multi-layer blowing pipes can improve the air seal area, thereby further improving the air seal effect of argon blowing of the blowing pipes.

It is worth pointing out that the paraffin 820 is disposed on the inner side wall of the cover housing 600, and the paraffin 820 is uniformly disposed on the inner side wall of the cover housing 600 along the circumferential direction. At the beginning of the casting process, the molten steel radiation heat enables the paraffin 820 to be burned, and then the residual oxygen in the cover body shell 600 is consumed by the paraffin 820, so that oxygen is prevented from entering the molten steel, and the molten steel is protected; and the uniform arrangement of the paraffin 820 makes the consumption of the oxygen remaining in the cover casing 600 more uniform and sufficient. The inner sidewall of the cover body case 600 is provided with a fixing member 810 protruding from the sidewall, and the paraffin 820 is fixed to the fixing member 810. The fixing member 810 may be a supporting plate/pin for fixing the wax 820 on the inner sidewall of the cover housing 600 more firmly.

In the embodiment, the paraffin 820 is arranged on the side wall of the inner upper part of the cover body shell 600, and the paraffin 820 is arranged in the height direction and is 1/3-1/2 of the whole height of the cover body shell 600, because the molten steel is mainly exposed at the upper part in the cover body shell 600, the paraffin 820 is mainly combusted at the upper part in the cover body shell 600, and the molten steel is pertinently protected.

The invention has been described above in detail with reference to specific exemplary embodiments. It will, however, be understood that various modifications and changes may be made without departing from the scope of the invention as defined by the appended claims. The detailed description and drawings are to be regarded as illustrative rather than restrictive, and any such modifications and variations are intended to be included within the scope of the present invention as described herein. Furthermore, the background is intended to illustrate the present state of the art and the meaning of the present development and is not intended to limit the present invention or the present application and the field of application of the present invention.

More specifically, although exemplary embodiments of the invention have been described herein, the invention is not limited to these embodiments, but includes any and all embodiments modified, omitted, such as combinations between various embodiments, adapted changes and/or substitutions as would be recognized by those skilled in the art from the foregoing detailed description. The limitations in the claims are to be interpreted broadly based the language employed in the claims and not limited to examples described in the foregoing detailed description or during the prosecution of the application, which examples are to be construed as non-exclusive. Any steps recited in any method or process claims may be executed in any order and are not limited to the order presented in the claims. The scope of the invention should, therefore, be determined only by the appended claims and their legal equivalents, rather than by the descriptions and examples given above.

Claims

1. The airtight cover for casting the 1Cr17Ni2 or 5CrNiMoV molten steel is characterized by comprising a cover body shell (600), wherein the top of the cover body shell (600) is provided with a water gap accommodating hole (601), and the cover body bottom (620) of the cover body shell (600) is provided with a casting accommodating hole (602); an upper injection pipe (710) and a lower injection pipe (720) are arranged in the cover body shell (600), the injection direction of the upper injection pipe (710) is arranged in an upward inclined mode, the injection direction of the lower injection pipe (720) is arranged in a downward inclined mode, the upper injection pipe (710) is connected with an air source through an upper vent pipe (711), and the lower injection pipe (720) is connected with the air source through a lower vent pipe (721).

2. The hermetic cover for casting of 1Cr17Ni2 or 5CrNiMoV molten steel according to claim 1, wherein the inner sidewall of the cover body housing (600) is provided with paraffin wax (820), and the paraffin wax (820) is uniformly arranged on the inner sidewall of the cover body housing (600) along the circumferential direction.

3. A molten steel casting gas-tight shroud for 1Cr17Ni2 or 5CrNiMoV according to claim 1, wherein refractory wool (610) is provided along the circumference of the nozzle receiving bore (601) at the top of the shroud body housing (600).

4. The airtight cover for molten steel casting of 1Cr17Ni2 or 5CrNiMoV, as defined in claim 1, wherein said upper blowing tube (710) has an inclination angle of 30-60 ° with respect to the horizontal plane, and said lower blowing tube (720) has an inclination angle of 30-60 ° with respect to the horizontal plane.

5. The hermetic enclosure for molten steel casting of 1Cr17Ni2 or 5CrNiMoV according to claim 1, wherein the plurality of upper blowing tubes (710) are provided, and the upper blowing tubes (710) are uniformly arranged along the circumferential direction inside the enclosure housing (600).

6. The hermetic enclosure for molten steel casting of 1Cr17Ni2 or 5CrNiMoV according to claim 1, wherein the plurality of downblow pipes (720) are provided, and the downblow pipes (720) are uniformly arranged in a circumferential direction inside the enclosure housing (600).

7. The gas-tight enclosure for molten steel casting of 1Cr17Ni2 or 5CrNiMoV according to claim 1, wherein the up-blowing tube (710) is provided with at least two layers in the height direction.

8. The hermetic enclosure for molten steel casting of 1Cr17Ni2 or 5CrNiMoV according to claim 1, wherein the lower blowing tube (720) is provided with at least two layers in the height direction.

9. The airtight cover for molten steel casting of 1Cr17Ni2 or 5CrNiMoV according to claim 2, wherein the paraffin wax (820) is disposed on the side wall of the inner upper portion of the cover body housing (600), and the height of the paraffin wax (820) disposed in the height direction is 1/3-1/2 of the total height of the cover body housing (600).

10. The airtight cover for casting molten steel of 1Cr17Ni2 or 5CrNiMoV as claimed in claim 2, wherein the inner sidewall of the cover body housing (600) is provided with a fixing member (810) protruding from the sidewall, and the paraffin wax (820) is fixed on the fixing member (810).