Bending auxiliary tool, bending method, blast furnace coal injection system and coal injection method

Abstract

The present invention discloses a bending auxiliary tool, a bending method, a blast furnace coal injection system, and a blast furnace coal injection method. The bending auxiliary tool includes a clamping disc that can be clamped to the inner wall of a reference part, the clamping disc being provided with an open slot that allows the part to be bent to pass through; and a ruler provided on the clamping disc, the length direction of the ruler being perpendicular to the plane where the clamping disc is located, and the plane where the ruler is located coincides with the middle plane of the open slot. During use, the clamping disc is clamped to the inner wall of the blowpipe, and the spray gun passes through the open slot. Since the ruler is perpendicular to the plane where the clamping disc is located, the spray gun is bent to be parallel to the ruler based on the ruler, so that the center line of the spray gun tends to and is parallel to the center line of the blowpipe, thereby causing the diffusion area of ​​the high-speed coal powder ejected from the spray gun to tend to the center line position of the blowpipe, reducing the scouring of the high-speed coal powder on the tuyere sleeve at the end of the blowpipe, thereby reducing the wear on the inner wall of the tuyere sleeve and extending the service life of the spray gun.

Description

Technical Field

[0001] The present invention relates to the technical field of bending tools, and in particular to a bending auxiliary tool, a bending method, a blast furnace coal injection system and a blast furnace coal injection method. Background Art

[0002] Currently, blast furnace coal injection (BFI) has become a key technology for the development of the steel industry, and the lance is one of the key devices in this technology. There are three types of lance configurations: oblique insertion, straight insertion, and fixed tuyere. Oblique insertion lances offer the advantages of ease of operation, a shorter direct heating zone, and resistance to deformation. Therefore, most BFI systems use oblique insertion lances.

[0003] like Figure 1 As shown, the oblique-insertion spray gun 100 is inserted into the blow pipe 200 through the hole 201 reserved on the blow pipe 200 and enters the tuyere sleeve 300 at the end of the blow pipe 200. There is a certain angle between the center line of the hole 201 reserved on the blow pipe 200 and the center line of the blow pipe 200, that is, the center line of the spray gun 100 and the center line of the blow pipe 200 are inclined, resulting in that after the high-speed coal powder is sprayed out through the spray gun 100, the diffusion area of ​​the high-speed coal powder deviates from the center position of the end of the blow pipe 200, making it easy for the high-speed coal powder to scour the tuyere sleeve 300 at the end of the blow pipe 200, causing serious wear on the inner wall of the tuyere sleeve 300, thereby reducing the service life of the spray gun 100.

[0004] Therefore, how to extend the service life of the spray gun has become a technical problem urgently to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a bending auxiliary tool to extend the service life of a spray gun.

[0006] To achieve the above object, the present invention provides a bending auxiliary tool for bending a part to be bent to be parallel to a reference part, the bending auxiliary tool comprising:

[0007] A clamping plate capable of being clamped to the inner wall of the reference part, wherein the clamping plate is provided with an opening slot capable of allowing the part to be bent to pass through;

[0008] A ruler is provided on the clamping disc, wherein the length direction of the ruler is perpendicular to the plane where the clamping disc is located, and the plane where the ruler is located coincides with the middle surface of the opening slot.

[0009] Preferably, in the above-mentioned bending assisting tool, the scale is welded to the clamping plate.

[0010] Preferably, in the above-mentioned bending auxiliary tool, a reference portion is provided at one end of the ruler close to the open groove, and the open groove has a first side wall that is parallel to or coincides with the plane where the reference portion is located.

[0011] Preferably, in the above-mentioned bending auxiliary tool, the center of the clamping disk is located on the plane where the reference portion is located.

[0012] Preferably, in the above-mentioned bending auxiliary tool, the plane where the first side wall is located coincides with the plane where the reference portion is located.

[0013] Preferably, in the above-mentioned bending auxiliary tool, the opening groove is a square groove, and the second side wall and the third side wall of the opening groove are symmetrically arranged on both sides of the center line of the clamping disk in the diameter direction.

[0014] Preferably, in the above-mentioned bending auxiliary tool, the clamping disc is circular, and a clamping portion is provided in the circumferential direction of the clamping disc, and the plane where the clamping portion is located is perpendicular to the plane where the clamping disc is located.

[0015] Preferably, in the above-mentioned bending auxiliary tool, the clamping portion is in a circular ring shape.

[0016] Preferably, in the above-mentioned bending auxiliary tool, the clamping portion is provided on a side of the clamping plate away from the ruler.

[0017] Preferably, in the above-mentioned bending assisting tool, the bending assisting tool further includes a goniometer.

[0018] A blast furnace coal injection system comprises the bending auxiliary tool as described in any one of the above.

[0019] A bending method, using any one of the above-mentioned bending auxiliary tools, comprises the following steps:

[0020] S1: The clamping plate is clamped to the inner wall of the reference part;

[0021] S2: bend the parts to be bent;

[0022] S3: Determine whether the part to be bent is bent parallel to the ruler, if yes, execute step S4, if not, execute step S2;

[0023] S4: End.

[0024] A blast furnace coal injection method includes the bending method described above.

[0025] It can be seen from the above technical solution that when using the bending auxiliary tool provided by the present invention, the clamping disk is clamped to the inner wall of the blowpipe, and the spray gun is inserted into the reserved channel on the blowpipe and then passes through the open slot on the clamping disk. Since the length direction of the ruler is perpendicular to the plane where the clamping disk is located, that is, the ruler is parallel to the center line of the blowpipe, the side of the spray gun close to the air inlet sleeve is bent to be parallel to the ruler based on the ruler, so that the center line of the spray gun in the bent section can be tended to and parallel to the center line of the blowpipe, thereby making the diffusion area of ​​the high-speed coal powder sprayed by the spray gun tend to the center line position of the blowpipe, reducing the scouring of the air inlet sleeve at the end of the blowpipe by the high-speed coal powder, thereby reducing the wear of the inner wall of the air inlet sleeve and extending the service life of the spray gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of the installation structure of an existing oblique-insertion spray gun on a blowpipe;

[0028] Figure 2 A schematic diagram of the installation structure of a bent spray gun on a blowpipe provided by an embodiment of the present invention;

[0029] Figure 3 A schematic top view of a bending auxiliary tool provided by an embodiment of the present invention;

[0030] Figure 4 A schematic side view of the structure of a bending auxiliary tool provided by an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the installation structure of a bending auxiliary tool on a blowpipe provided by an embodiment of the present invention;

[0032] Figure 6 A schematic diagram of the installation structure of a bending auxiliary tool provided by an embodiment of the present invention before the spray gun is bent;

[0033] Figure 7 A schematic diagram of the structure of a spray gun provided by an embodiment of the present invention after being bent to be parallel to a scale;

[0034] Figure 8 A schematic flow chart of a bending method provided by an embodiment of the present invention.

[0035] Among them, 100 is a spray gun, 101 is a bending section, 200 is a blowpipe, 201 is a reserved channel 201, 300 is a tuyere sleeve, a is the center line of the blowpipe, 400 is a clamping plate, 401 is an opening slot, 4011 is a first side wall, 4012 is a second side wall, 4013 is a third side wall, 402 is a clamping part, 500 is a ruler, and α is the angle between the base part of the ruler and the outer wall of the blowpipe. DETAILED DESCRIPTION

[0036] As can be seen from the background technology description, the center line of the obliquely inserted spray gun 100 is inclined with respect to the center line a of the blowpipe, resulting in that after the high-speed coal powder is ejected through the spray gun 100, the diffusion area of ​​the high-speed coal powder ejected by the spray gun 100 deviates from the center position of the end of the blowpipe 200, making it easy for the high-speed coal powder to wash the air inlet sleeve 300 at the end of the blowpipe 200, causing more serious wear on the inner wall of the air inlet sleeve 300, thereby reducing the service life of the spray gun 100.

[0037] Furthermore, in order to reduce the wear of the inner wall of the tuyere sleeve 300 caused by the high-speed coal powder, the diffusion area of ​​the high-speed coal powder sprayed by the spray gun 100 needs to be directed toward the position of the blowpipe center line a. Figure 2 As shown, the present invention bends the end of the spray gun 100 so that the center line of the bent section 101 of the spray gun 100 is parallel to the center line a of the blowpipe, so that the diffusion area of ​​the high-speed coal powder sprayed by the spray gun 100 tends to the position of the center line a of the blowpipe.

[0038] Therefore, how to bend the end of the spray gun 100 to be parallel to the blowpipe centerline a is the key to reducing the wear of the inner wall of the tuyere sleeve 300 caused by high-speed coal powder, thereby extending the service life of the spray gun 100.

[0039] In view of this, the core of the present invention is to provide a bending auxiliary tool to facilitate bending the end of the spray gun 100 to be parallel to the center line a of the blowpipe, thereby extending the service life of the spray gun 100.

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0041] like Figures 3 to 7 As shown, the present invention discloses a bending auxiliary tool for bending a part to be bent to be parallel to a reference part. The bending auxiliary tool includes a clamping plate 400 and a ruler 500.

[0042] Among them, the clamping disk 400 can be clamped to the inner wall of the reference part, and the clamping disk 400 is provided with an open groove 401 that allows the part to be bent to pass through; the ruler 500 is set on the clamping disk 400, and the length direction of the ruler 500 is perpendicular to the plane where the clamping disk 400 is located, and the plane where the ruler 500 is located coincides with the middle surface of the opening groove 401.

[0043] When using the bending auxiliary tool provided by the present invention, the clamping plate 400 is clamped to the inner wall of the blow pipe 200, and the spray gun 100 is inserted into the reserved channel 201 on the blow pipe 200 and then passes through the open slot 401 on the clamping plate 400. Since the length direction of the ruler 500 is perpendicular to the plane where the clamping plate 400 is located, that is, the ruler 500 is set parallel to the center line a of the blow pipe, the spray gun 100 is bent on the side close to the air inlet sleeve 300 with the ruler 500 as a reference, so that the center line of the spray gun 100 in the bent section 101 tends to and is parallel to the center line a of the blow pipe, thereby making the diffusion area of ​​the high-speed coal powder sprayed by the spray gun 100 tend to the position of the center line a of the blow pipe, reducing the scouring of the high-speed coal powder on the air inlet sleeve 300 at the end of the blow pipe 200, thereby reducing the wear of the inner wall of the air inlet sleeve 300 and extending the service life of the spray gun 100.

[0044] It should be noted that the above-mentioned ruler 500 can be a steel ruler with a scale, a steel bar or a bar with a structure similar to that of a steel ruler, etc. As long as it is perpendicular to the plane where the clamping plate 400 is located and can be used as a bending reference for the spray gun 100, it falls within the scope of protection of the present invention.

[0045] In addition, the ruler 500 can be directly fixedly connected to the clamping plate 400, or it can be connected to the clamping plate 400 through a structure such as a slide rail or a slide groove, so as to adjust the position of the ruler 500 on the clamping plate 400. As long as the connection method can meet the use requirements, it falls within the protection scope of the present invention; preferably, the embodiment of the present invention adopts a fixed connection, which has a simple structure and is easy to process and manufacture.

[0046] The scale 500 and the clamping plate 400 can be connected by welding, bonding or melting. As long as the parts can fix the scale 500 to the clamping plate 400, they are within the scope of protection of the present invention; preferably, the embodiment of the present invention adopts welding, which has a higher connection strength.

[0047] In addition, the ruler 500 and the chuck 400 can be directly connected or connected by providing other components such as a connecting plate, a connecting bracket or a connecting block, as long as a fixed connection between the ruler 500 and the chuck can be achieved; preferably, the embodiment of the present invention adopts a direct connection to save the number of components and reduce costs.

[0048] Further, if Figure 3 and Figure 4 As shown, a reference portion is provided at one end of the ruler 500 close to the opening slot 401, and the opening slot 401 has a first side wall 4011 which is parallel to or coincides with the plane where the reference portion is located, so that the spray gun 100 can be bent to be parallel to the reference portion of the ruler 500 based on the ruler 500, thereby making the spray gun 100 parallel to the blowpipe 200.

[0049] It should be noted that the reference portion can be a machined surface directly machined on the ruler 500 that can serve as a reference, or it can be a component that is separately provided on the ruler 500 and can serve as a reference. As long as the structure can meet the bending reference requirements, it falls within the scope of protection of the present invention; preferably, the embodiment of the present invention adopts an integral molding with the ruler 500, and the machined surface directly machined is the reference portion, which can save the number of components and reduce costs.

[0050] Furthermore, the reference portion of the ruler 500 can be set at any position parallel to or overlapping with the plane where the first side wall 4011 is located. As long as the structure is convenient for bending based on the reference portion of the ruler 500, it falls within the scope of protection of the present invention; preferably, the embodiment of the present invention sets the ruler 500 at the center of the clamping disk 400, so that the center of the clamping disk 400 is located in the plane where the reference portion is located, so that the center line a of the blowpipe is located in the plane where the reference portion is located, and then the spray gun 100 is bent to be flush with the center line a of the blowpipe based on the reference portion.

[0051] In addition, the plane where the first side wall 4011 of the opening groove 401 is located can be set to any plane parallel to the plane where the reference portion is located, or it can be set to a plane that coincides with the plane where the reference portion is located. As long as it is a structure that facilitates bending the spray gun 100 based on the reference portion of the ruler 500, it falls within the scope of protection of the present invention; preferably, an embodiment of the present invention adopts the method of setting the plane where the first side wall 4011 is located to a plane that coincides with the plane where the reference portion is located, so as to avoid interference between the first side wall 4011 and the bent spray gun 100, thereby preventing the spray gun 100 from being bent to be flush with the reference portion.

[0052] In addition, the opening groove 401 can be a square groove, a U-shaped groove or a V-shaped groove. As long as the opening groove 401 structure can meet the use requirements, it falls within the protection scope of the present invention; preferably, the embodiment of the present invention adopts a square groove, which has a simple structure and is easy to process and manufacture.

[0053] In addition, the second side wall 4012 and the third side wall 4013 of the opening groove 401 are symmetrically arranged on both sides of the center line of the diameter direction of the clamping plate 400, so as to guide the spray gun 100 so that the spray gun 100 moves toward the position of the blowpipe center line a after passing through the opening groove 401.

[0054] It should be noted that the distance between the second side wall 4012 and the third side wall 4013 should not be too large, so that the spray gun 100 can pass through smoothly. The distance between the second side wall 4012 and the third side wall 4013 should not be too large, which may prevent the spray gun 100 from being able to guide the spray gun 100 and causing the spray gun 100 to deviate from the position of the center line a of the blowpipe after passing through the opening slot 401.

[0055] Furthermore, the clamping disc 400 is circular, and a clamping portion 402 is provided in the circumferential direction of the clamping disc 400 so as to be clamped to the inner wall of the blowpipe 200 .

[0056] The clamping portion 402 provided by the present invention can be a structure directly integrally formed with the clamping disc 400, or it can be a separately provided component. As long as the structure can clamp the clamping disc 400 to the inner wall of the blowpipe 200, it falls within the protection scope of the present invention; preferably, the embodiment of the present invention adopts a clamping portion 402 integrally formed with the clamping disc 400, which can save components and reduce costs.

[0057] like Figure 4 As shown, the plane where the clamping portion 402 is located is perpendicular to the plane where the clamping disc 400 is located, so that when the clamping disc 400 is clamped to the inner wall of the blow pipe 200, the clamping portion 402 and the inner wall of the blow pipe 200 have a large friction force, preventing the clamping disc 400 from falling off the inner wall of the blow pipe 200.

[0058] It should be noted that the clamping portion 402 can be a clamping piece, a barb structure, or a circular ring structure arranged in the circumferential direction of the clamping disk 400, which is randomly or evenly distributed in the circumferential direction of the clamping disk 400. As long as the structure is convenient for clamping the clamping disk 400 to the inner wall of the blow pipe 200, it falls within the scope of protection of the present invention; preferably, the embodiment of the present invention adopts a circular ring structure arranged in the circumferential direction of the entire clamping disk 400, which has a simple structure, a large contact area with the inner wall of the blow pipe 200, and a better clamping effect.

[0059] In addition, the clamping portion 402 can be arranged on the side of the clamping plate 400 away from the setting scale 500, or it can be arranged on the side of the clamping plate 400 where the scale 500 is set, as long as the clamping plate 400 can be clamped to the inner wall of the blowpipe 200 through the clamping portion 402; preferably, the embodiment of the present invention sets the clamping portion 402 on the side of the clamping plate 400 away from the setting scale 500.

[0060] Furthermore, the bending auxiliary tool provided by the present invention also includes a goniometer, so that when it is necessary to measure the angle between the spray gun 100 and the blowpipe centerline a, the angle α between the reference portion of the scale 500 and the outer wall of the spray gun 100 can be measured by the goniometer.

[0061] The goniometer provided by the present invention can be a vernier protractor, a semicircular protractor, or an electronic digital display protractor. As long as it is a structure that can measure angles, it falls within the protection scope of the present invention.

[0062] In addition, an embodiment of the present invention further discloses a blast furnace coal injection system, including any one of the bending auxiliary tools described above, and thus has all the technical effects of the above-mentioned bending auxiliary tools, which will not be described in detail herein.

[0063] like Figure 8 As shown, the present invention also discloses a bending method, using any one of the bending auxiliary tools described above, comprising the steps of:

[0064] S1: The clamping plate 400 is clamped to the inner wall of the reference part so that the scale 500 on the clamping plate 400 is parallel to the center line of the reference part;

[0065] S2: bend the parts to be bent;

[0066] S3: Determine whether the part to be bent is bent parallel to the scale 500, if yes, execute step S4, if not, execute step S2;

[0067] S4: End.

[0068] It can be seen that when the spray gun 100 is bent using the bending method provided by the present invention, the clamping plate 400 is clamped to the inner wall of the blowpipe 200, so that the scale 500 on the clamping plate 400 is parallel to the blowpipe center line a, and then the side of the spray gun 100 close to the air inlet sleeve 300 is bent to be parallel to the scale 500 based on the scale 500, so that the center line of the bent section 101 of the spray gun 100 tends to and is parallel to the blowpipe center line a, thereby making the diffusion area of ​​the high-speed coal powder ejected from the spray gun 100 tend to the position of the blowpipe center line a, reducing the scouring of the high-speed coal powder on the air inlet sleeve 300 at the end of the blowpipe 200, thereby reducing the wear of the inner wall of the air inlet sleeve 300 and extending the service life of the spray gun 100.

[0069] It should be noted that the clamping plate 400 can be clamped to any position on the inner wall of the blow pipe 200, as long as the position can make the scale 500 parallel to the center line a of the blow pipe, so as to facilitate bending the spray gun 100, it falls within the protection scope of the present invention; preferably, the embodiment of the present invention clamps the clamping plate 400 to one end of the inner wall of the blow pipe 200 close to the air inlet sleeve 300, and makes the clamping plate 400 flush with the outlet of the blow pipe 200 close to the air inlet sleeve 300, so as to facilitate bending the spray gun 100 with the scale 500 as a reference.

[0070] In addition, an embodiment of the present invention further discloses a blast furnace coal injection method, including the bending method as described above, and thus has all the technical effects of the above bending method, which will not be described in detail herein.

[0071] The terms "first," "second," and the like in the specification, claims, and accompanying drawings of the present invention are used to distinguish between different items, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements and may include steps or elements that are not listed.

[0072] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bending auxiliary tool for bending a part to be bent to be parallel to a reference part, wherein the part to be bent is a spray gun and the reference part is a blowpipe, characterized in that: The bending auxiliary tool includes: a clamping plate (400) capable of being clamped to the inner wall of the reference part, the clamping plate (400) being provided with an opening slot (401) capable of allowing the part to be bent to pass through; a ruler (500) provided on the clamping disc (400), wherein the length direction of the ruler (500) is perpendicular to the plane where the clamping disc (400) is located, and the plane where the ruler (500) is located coincides with the middle surface of the opening slot (401); The ruler (500) is provided with a reference portion at one end close to the opening slot (401), and the opening slot (401) has a first side wall (4011) that is parallel to or coincides with the plane where the reference portion is located; The opening groove (401) is a square groove, and the second side wall (4012) and the third side wall (4013) of the opening groove (401) are symmetrically arranged on both sides of the center line in the diameter direction of the clamping disc (400).

2. The bending assisting tool according to claim 1, wherein: The scale (500) is welded to the clamping plate (400).

3. The bending assisting tool according to claim 1, wherein: The center of the clamping disc (400) is located on the plane where the reference portion is located.

4. The bending assisting tool according to claim 1, wherein: The plane where the first side wall (4011) is located coincides with the plane where the reference portion is located.

5. The bending assisting tool according to claim 1, wherein: The clamping disc (400) is circular, and a clamping portion (402) is provided in the circumferential direction of the clamping disc (400), and the plane where the clamping portion (402) is located is perpendicular to the plane where the clamping disc (400) is located.

6. The bending assisting tool according to claim 5, wherein: The clamping portion (402) is in the shape of a circular ring.

7. The bending assisting tool according to claim 5, wherein: The clamping portion (402) is provided on a side of the clamping plate (400) away from the scale (500).

8. The bending assisting tool according to claim 1, wherein: The bending auxiliary tool further includes a goniometer.

9. A blast furnace coal injection system, characterized in that: The invention comprises the bending auxiliary tool according to any one of claims 1 to 8.

10. A bending method, characterized in that: The application of the bending auxiliary tool according to any one of claims 1 to 8 comprises the following steps: S1: The clamping plate (400) is clamped to the inner wall of the reference part; S2: bend the parts to be bent; S3: Determine whether the part to be bent is bent parallel to the ruler (500), if yes, execute step S4, if not, execute step S2; S4: End.

11. A blast furnace coal injection method, characterized in that: Including the bending method as claimed in claim 10.

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