Air blowing pipe with supporting piece and stopper rod applying air blowing pipe

Abstract

The utility model relates to the technical field of stopper rods, in particular to an air blowing pipe with a supporting piece and a stopper rod applying the air blowing pipe, and particularly provides the air blowing pipe with the supporting piece, which comprises an air blowing pipe, and an air guide channel is arranged in the air blowing pipe. The device further comprises a supporting piece which penetrates through the gas guide channel and is used for supporting the gas blowing pipe in the pressing forming process of the gas blowing pipe and the stopper rod, and the supporting piece which is prone to gasification is arranged in the gas blowing pipe, so that the technical problem that in the pressing forming process of the gas blowing pipe and the stopper rod, the gas blowing pipe is prone to fracturing, and normal production of the stopper rod is affected is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of stopper rods, in particular to a blowpipe with a support and a stopper rod using the blowpipe. Background Art

[0002] In the argon blowing device for the integral sealing of the continuous casting tundish stopper rod, the blowing pipe is a key component with the advantage of accurately controlling the blowing speed. Therefore, the blowing pipe plays an important role in the stopper rod. Its installation accuracy and installation stability directly affect the service life of the stopper rod.

[0003] Chinese patent CN1232372C discloses a monolithic stopper rod suitable for supplying gas during the pouring of molten metal. The stopper rod comprises a stopper rod body having an internal chamber and a gas outlet; a hole connecting the internal chamber to the gas outlet; and a calibration device disposed in the hole to provide a throttling passage. The stopper rod is characterized in that the calibration device comprises a rod having at least one gas passage extending axially thereof, the gas passage having a cross-section to provide a predetermined flow resistance. The stopper rod of the present invention is more reliable and easily adaptable to various operating parameters.

[0004] However, the technical solution records a method of integrally pressing the rod and the stopper rod. However, during the pressing process, since the interior of the rod is a hollow structure, it is easily broken when squeezed, which affects the product qualification rate. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies of the existing technology and provide a blowing pipe with a support member. By arranging an easily gasified support member inside the blowing pipe, the technical problem that the blowing pipe is easily fractured during the pressing and forming process with the stopper rod, which affects the normal production of the stopper rod, is solved.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A blowing pipe with a support member comprises a blowing pipe, wherein an air guide channel is provided inside the blowing pipe, and is characterized in that it also comprises a support member which is arranged through the air guide channel and is used to support the blowing pipe during the press-forming process of the blowing pipe and the stopper rod.

[0008] As an improvement, the gasification temperature of the support member is less than 900°C.

[0009] As an improvement, the blowing pipe is cylindrical or boss cylindrical.

[0010] As an improvement, the air blowing pipe is in the shape of a frustum.

[0011] As an improvement, the outer diameter surface of the air blowing pipe is provided with a plurality of positioning portions along its axial direction.

[0012] As an improvement, the positioning portion is a positioning protrusion or a positioning groove.

[0013] As an improvement, a plurality of air guide channels are evenly distributed along the cross section of the air blowing pipe.

[0014] As an improvement, the air guide channel is arranged at the center of the air blowing pipe.

[0015] As an improvement, the air blowing tube is a ceramic tube or an alumina tube.

[0016] The purpose of the utility model is to address the shortcomings of the existing technology and provide a stopper rod. By adopting the above-mentioned blow pipe structure, the breakage rate of the blow pipe during the pressing and molding process is greatly reduced, thereby improving the qualified rate of the finished stopper rod. At the same time, by adopting this blow pipe structure, there is no need to demould the inside of the blow pipe after pressing, which further reduces the probability of the blow pipe being damaged.

[0017] To achieve the above objectives, the present invention provides the following technical solutions:

[0018] A stopper rod comprises a stopper rod body, a stopper rod head is provided at the bottom of the stopper rod body, a gas channel is provided inside the stopper rod body, and an air outlet channel is provided inside the stopper rod head. The invention is characterized in that it also comprises a blowing tube with a support as described above, which is provided on the air outlet channel, and a limiting structure is formed between the blowing tube and the stopper rod head.

[0019] As an improvement, the support member is gasified and disappears during the firing process of the stopper rod.

[0020] The beneficial effects of the present invention are:

[0021] (1) The utility model provides a support member inside the blowing tube so that the blowing tube and the plug rod can be pressed and formed by the support member to support the blowing tube, thereby preventing the blowing tube from breaking during the pressing and forming process, thereby greatly improving the product qualification rate and reducing production costs.

[0022] (2) The utility model improves the connection stability between the air blowing tube and the stopper rod by providing a positioning portion on the outer side of the air blowing tube.

[0023] (3) During the forming process of the stopper rod of the utility model, the support member is used to form the air outlet channel, thereby improving the coaxiality of the air outlet channel and the air guide channel and improving the control accuracy of the blowing volume.

[0024] (4) The utility model takes advantage of the automatic gasification and decomposition of the support during the firing process, so that the blow pipe does not need to be demolded after pressing, further reducing the risk of the blow pipe breaking, thereby further improving the qualified rate of the finished stopper rod.

[0025] In summary, the utility model has the advantages that the air blowing tube is not easily broken during the pressing process and the stopper rod pressing molding has a high pass rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the installation structure of the air blowing pipe and the support member of the utility model;

[0027] Figure 2 This is a schematic diagram of the air blowing tube of the utility model Figure 1 ;

[0028] Figure 3 This is a schematic diagram of the air blowing tube of the utility model Figure 2 ;

[0029] Figure 4 This is a schematic diagram of the air blowing tube of the utility model Figure 3 ;

[0030] Figure 5 This is a schematic diagram of the cross section of the blowing pipes of various specifications of the utility model;

[0031] Figure 6 This is an overall schematic diagram of the stopper rod of the utility model;

[0032] Figure 7 This is a schematic diagram of the installation status of the stopper rod and the blowpipe of the utility model Figure 1 ;

[0033] Figure 8 This is a schematic diagram of the installation status of the stopper rod and the blowpipe of the utility model Figure 2 ;

[0034] Figure 9 This is a schematic diagram of the installation status of the stopper rod and the blowpipe of the utility model Figure 3 ;

[0035] Figure 10 This is a schematic diagram of the assembly of the stopper rod forming mold of the utility model. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0038] Example 1

[0039] like Figures 1-4 As shown, this embodiment provides an air blowing tube with a support member, including an air blowing tube 1, an air guide channel 11 is provided inside the air blowing tube 1, and also includes a support member 2 that passes through the air guide channel 11 and is used to support the air blowing tube 1 during the press-forming process of the air blowing tube 1 and the stopper rod.

[0040] As an improvement, the support member 2 has a vaporization temperature of less than 900°C, and is preferably made of a material with a certain strength, such as plastic or nylon. Of course, it is not limited to the above two types. Any material that can meet the support strength and is easy to vaporize can meet the requirements of this application.

[0041] Preferably, the outer contour size of the support member 2 is not larger than the inner contour size of the air guide channel 11, so as to achieve rapid assembly and complete support of the air blowing tube 1 and avoid damage to the air blowing tube 1. It is preferred that the outer diameter size of the support member 2 is close to the inner diameter size of the air guide channel 11.

[0042] As an improvement, the blowing tube 1 is any one of cylindrical, boss cylindrical or frustum-shaped, and the corresponding shape is selected according to different working conditions to meet the stopper rod with different service life requirements. Figure 1-Figure 2 It is a cylindrical structure. Figure 3 It is a boss cylindrical structure. Figure 4 It is a frustum-shaped structure.

[0043] As an improvement, the outer diameter surface of the blowing tube 1 is provided with a plurality of positioning parts 12 along its axial direction. By providing the positioning parts 12, the positioning accuracy of the blowing tube 1 is ensured after the blowing tube 1 and the stopper rod are formed, and the stopper rod is not easy to fall off during use.

[0044] As an improvement, the positioning portion 12 is a positioning protrusion or a positioning groove, and the protrusion or groove is selected according to the processing technology of the air blowing pipe.

[0045] As an improvement, Figure 5 As shown, a plurality of air guide channels 11 are evenly distributed along the cross section of the air blowing pipe 1 .

[0046] As an improvement, the air guide channel 11 is arranged at the center of the air blowing pipe 1. The air guide channel 11 of the air blowing pipe 1 can be set according to different air intake volumes and customer requirements to meet different air blowing volume requirements.

[0047] As an improvement, the air blowing tube 1 is a ceramic tube or an alumina tube. Through the high-temperature resistant material and the air guide channel 11 of stable size, stable air intake control is achieved, thereby improving the product use effect.

[0048] Example 2

[0049] like Figure 6-9 As shown, this embodiment provides a stopper rod, comprising a stopper rod body 3, a stopper rod head 4 provided at the bottom of the stopper rod body 3, a gas passage 31 provided inside the stopper rod body 3, a gas outlet passage 41 provided inside the stopper rod head 4, and a gas blowing pipe with a support member as described in the above embodiment, provided on the gas outlet passage 41. A limiting structure 5 is formed between the gas blowing pipe 1 and the stopper rod head 4. The limiting structure 5 prevents the gas blowing pipe 1 from falling off due to corrosion by molten steel during use of the stopper rod. The upper end surface of the gas blowing pipe 1 is higher than the top of the gas outlet passage 41, preventing impurities from accumulating in the gas passage 31 and clogging the gas outlet passage 41.

[0050] As an improvement, the support member 2 is vaporized and disappears during the firing process of the stopper rod.

[0051] Preferably, the limiting structure 5 is a step limiting portion, and the bottom of the blowing tube 1 is clamped at the step limiting portion to prevent the blowing tube 1 from falling, thereby increasing the service life of the stopper rod.

[0052] As another embodiment, the limiting structure 5 is a conical limiting portion, the air blowing pipe 1 is a frustum, and the outer diameter surface of the air blowing pipe 1 matches the conical limiting portion; it should be noted that the frustum structure is used to limit the air blowing pipe 1, thereby improving the strength of the conical air blowing pipe 1 and thus improving the service life.

[0053] Furthermore, in this embodiment, the lower end surface of the blowing pipe 1 is higher than the bottom end of the gas outlet channel 4121; through this arrangement, after the bottom of the stopper rod head 4 is corroded, it does not affect the normal gas outlet of the blowing pipe 1 and prevents the molten steel from impacting the blowing pipe 1, thereby avoiding damage to the blowing pipe 1 during use.

[0054] Processing steps:

[0055] Step 1: Positioning the air blowing pipe 1: Place the air blowing pipe 1 in the molding cavity 8 formed between the molding outer mold 6 and the molding inner mold 7 and position it; the bottom of the support member 2 abuts against the inner wall of the molding inner mold 7 to form the air outlet channel 41; preferably, the air blowing pipe 1 can be connected to the molding outer mold or the molding inner mold 7 to achieve the positioning and installation of the air blowing pipe 1;

[0056] Step 2: Pressing and forming: the refractory material for making the stopper rod body 3 is introduced into the forming cavity 8, and the refractory material in the forming cavity 8 is press-formed. It should be noted that, depending on the material of the stopper rod body 3, a corresponding pressing and forming method is selected, such as isostatic pressing, dry pressing or extrusion.

[0057] Step 3: Demolding. After demolding, a pressed stopper rod is obtained. The outer molding die 6 and the inner molding die 7 are removed in reverse order of assembly, and demolding is completed.

[0058] Step 4: Firing, firing the stopper rod after demoulding in step 3 to obtain a finished stopper rod. The firing temperature is greater than 900° C. During the firing process, the support member 2 is gasified and disappears.

[0059] It should be noted that the support member 2 is made of plastic and does not require demolding after pressing. During the firing process, the support member 2 automatically vaporizes and decomposes. Therefore, the support member 2 can be assembled before pressing, ensuring that the support member 2 is in full contact with the inner wall of the blow tube 1. This ensures that the support member 2 is fully supported during the pressing process, avoiding the problem of the blow tube 1 being crushed.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An air blowing pipe with a support, comprising an air blowing pipe (1), wherein an air guide channel (11) is provided inside the air blowing pipe (1), characterized in that: It also includes a support member (2) for supporting the blowing tube (1) during the press-forming process of the blowing tube (1) and the stopper rod, one end of the support member (2) being arranged to pass through the air guide channel (11).

2. The air blowing pipe with a support according to claim 1, characterized in that: The gasification temperature of the support member (2) is less than 900°C.

3. The air blowing pipe with a support according to claim 1, characterized in that: The air blowing pipe (1) is in any one of a cylindrical shape, a boss cylindrical shape or a frustum shape.

4. The air blowing pipe with a support according to claim 1, characterized in that: The outer diameter surface of the air blowing pipe (1) is provided with a plurality of positioning portions (12) along its axial direction.

5. The air blowing pipe with a support member according to claim 4, characterized in that: The positioning portion (12) is a positioning protrusion or a positioning groove.

6. The air blowing tube with a support member according to claim 1, characterized in that: A plurality of the air guide channels (11) are evenly distributed along the cross section of the air blowing pipe (1).

7. The air blowing tube with a support member according to claim 1, characterized in that: The air guide channel (11) is arranged at the center of the air blowing pipe (1).

8. The air blowing tube with a support member according to claim 1, characterized in that: The air blowing tube (1) is a ceramic tube or an alumina tube.

9. A stopper rod, comprising a stopper rod body (3), a stopper rod head (4) provided at the bottom of the stopper rod body (3), a gas passage (31) provided inside the stopper rod body (3), and a gas outlet passage (41) provided inside the stopper rod head (4), characterized in that: It also comprises a blowing tube with a support member as claimed in any one of claims 1 to 8, which is arranged on the air outlet channel (41), and a limiting structure (5) is formed between the blowing tube (1) and the stopper rod head (4).

10. A stopper rod according to claim 9, characterized in that: The support member (2) gasifies and disappears during the stopper rod firing process.

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