Heating device for quenching steel plate

Abstract

The utility model discloses a heating device for quenching a steel plate, which relates to the technical field of metal heat treatment, and adopts the technical scheme that the heating device comprises a heating furnace and a furnace door arranged on the heating furnace in a sliding manner, brackets and sliding rails are fixed on the left side and the right side of the heating furnace, each sliding rail is provided with an arc-shaped bent section, and a plurality of sliding blocks are arranged in each sliding rail in a sliding manner; the multiple sliding blocks are connected with the same metal roller shutter, a heat insulation layer is fixed to the side, facing the heating furnace, of the metal roller shutter, an oil cylinder is fixed to the side wall of the heating furnace, and the output end of the oil cylinder is fixed to the metal roller shutter. According to the heating device, the metal roller shutters and the heat insulation layer can move to the opening in the front face of the heating furnace, steel plate materials can just pass through the space between the two metal roller shutters, and therefore the opening size of the heating furnace is greatly reduced, heat leakage in the heating furnace is reduced, and the effect of reducing energy consumption is achieved; on the other hand, the temperature of the quenching pool close to the heating furnace is prevented from rising too fast, and the subsequent quenching procedure can be continuously and stably operated.

Description

Technical Field

[0001] The utility model relates to the technical field of metal heat treatment, in particular to a heating device for quenching a steel plate. Background Art

[0002] Steel plates are commonly used materials and are widely used in equipment manufacturing and construction. For some steel plates with special strength requirements, their surface hardness can be increased by quenching. Quenching is a heat treatment process in which the steel is heated to a critical temperature, kept warm for a period of time to make it fully or partially austenitized, and then cooled rapidly at a cooling rate greater than the critical cooling rate to undergo martensitic transformation.

[0003] The utility model patent with announcement number CN202865294U discloses a steel plate heat treatment equipment, including a heating furnace, a quenching device, a tempering furnace and a conveying device for conveying the steel plate from the heating furnace to the quenching device and then to the tempering furnace. The conveying device includes a first conveying chain mechanism for conveying the steel plate from the heating furnace to the quenching device and a second conveying chain mechanism for conveying the steel plate from the quenching device to the tempering furnace.

[0004] The quenching pool is generally set near the inlet and outlet of the heating furnace for quenching. The inlet and outlet of the heating furnace are opened and closed by lifting doors. The lifting doors are of integrated design. When opened, the heating furnace opening is large, resulting in a large amount of heat leakage from the heating furnace. On the one hand, it leads to increased energy consumption. On the other hand, it will cause the temperature of the quenching pool close to the heating furnace to rise too quickly, affecting the normal quenching. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a heating device for quenching steel plates, which can reduce the heat exchange with the outside after the furnace door is opened, reduce the heat leakage inside the heating furnace, and avoid the quenching pool near the heating furnace from rising too quickly.

[0006] The above technical purpose of the utility model is achieved through the following technical scheme: a heating device for quenching steel plates, including a heating furnace and a furnace door slidably arranged on the heating furnace, brackets and slide rails are fixed on the left and right sides of the heating furnace, the slide rail has an arc-shaped curved section, a plurality of sliders are slidably arranged in the slide rail, and the plurality of sliders are connected to the same metal roller shutter, a heat insulation layer is fixed on the side of the metal roller shutter facing the heating furnace, an oil cylinder is fixed on the side wall of the heating furnace, and the output end of the oil cylinder is fixed to the metal roller shutter.

[0007] Through the above technical scheme, under the guidance of the slide rail, the oil cylinder pushes the metal roller shutter and the thermal insulation layer to move. In the curved section of the slide rail, the metal roller shutter and the thermal insulation layer produce corresponding bending deformation, so that the metal roller shutter and the thermal insulation layer move away from the end of the oil cylinder to the front opening of the heating furnace, so that the steel plate material can just pass through the space between the two metal roller shutters, thereby greatly reducing the opening size of the heating furnace and reducing the heat leakage inside the heating furnace.

[0008] Preferably, there are two groups of slide rails distributed up and down, and are symmetrically distributed up and down. The slider is a T-block. A T-slot adapted for sliding with the slider is opened inside the slide rail, and the width of the T-slot is greater than the width of the T-block at the corresponding position.

[0009] Through the above technical solution, the T-shaped slider cooperates with the inside of the slide rail to avoid direct separation of the slider and the slide rail. Since the slide rail has an arc section, the wider T-slot can avoid jamming when the slider slides.

[0010] Preferably, metal sheets are provided at both upper and lower ends of the front and back sides of the metal rolling curtain, the metal rolling curtain is sandwiched between two metal sheets, and the metal sheets and the metal rolling curtain are fixed by rivets.

[0011] Through the above technical solution, the metal sheet can protect the upper and lower ends of the metal rolling curtain to prevent the upper and lower ends of the metal rolling curtain from cracking and damage, and the metal sheet and the metal rolling curtain are fixed by rivets.

[0012] Preferably, a plurality of connecting plates are fixed on the top of the metal sheet, and connecting rods are rotatably provided on the connecting plates, and the connecting rods are fixed correspondingly to the sliding blocks.

[0013] Through the above technical solution, the metal sheet and the slider are connected through the connecting plate and the connecting rod.

[0014] Preferably, the bracket is rotatably provided with a guide roller 1, the guide roller 1 is located on the inner side of the curved section of the thermal insulation layer, and the guide roller 1 is in rolling contact with the thermal insulation layer.

[0015] Through the above technical solution, the inner side of the curved section of the thermal insulation layer can be guided by the guide roller 1, so that the movement of the thermal insulation layer is stable.

[0016] Preferably, the bracket is rotatably provided with a second guide roller, the second guide roller is in rolling contact with the metal rolling curtain, and the metal rolling curtain and the heat insulation layer are sandwiched between the first guide roller and the second guide roller.

[0017] Through the above technical solution, the outer side of the curved section of the metal roller blind can be guided by the guide roller 2, so that the movement of the metal roller blind is stable.

[0018] Preferably, a plurality of hanging rings are fixed on the front side of the metal rolling shutter, a triangular baffle is provided on the front side of the metal rolling shutter, and a hook cooperating with the hanging rings is fixed on the back side of the triangular baffle.

[0019] Through the above technical solution, the hook of the triangular baffle is hung on the hanging ring, and the triangular baffle can be installed on the metal roller shutter. The triangular baffle is used to block the top corner position of the heating furnace opening.

[0020] Preferably, the hanging rings are distributed along the height direction of the metal rolling curtain, and the hooks are located at the edge of the triangular baffle.

[0021] Through the above technical solution, the height position of the triangular baffle can be flexibly adjusted to match the opening of the furnace door.

[0022] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0023] 1. The ends of the metal rolling curtain and the heat insulation layer away from the oil cylinder can be moved to the front opening of the heating furnace, so that the steel plate material can pass through the space between the two metal rolling curtains, thereby greatly reducing the opening size of the heating furnace, reducing the heat leakage inside the heating furnace, and reducing energy consumption. On the other hand, it prevents the temperature of the quenching pool near the heating furnace from rising too quickly, so that the subsequent quenching process can run continuously and stably;

[0024] 2. This heating device uses a flexible metal roller curtain and a heat insulation layer. The metal roller curtain and the heat insulation layer are always close to the heating furnace, so it can reduce the occupation of the space outside the side wall of the heating furnace, reduce the site occupation, and make it easier to arrange the items on the site;

[0025] 3. Personnel can adjust the position of the triangular baffle on the metal roller shutter to block the top corners of the heating furnace opening. The triangular baffle further reduces the size of the heating furnace opening and improves the blocking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A perspective view of a heating device for quenching a steel plate according to an embodiment;

[0027] Figure 2 A side cross-sectional view of the connection structure between the slide rail and the metal roller shutter of the embodiment;

[0028] Figure 3 It is a top cross-sectional view of the guide roller 1 and the guide roller 2 of the embodiment.

[0029] In the figure, 1. heating furnace; 2. furnace door; 3. bracket; 4. slide rail; 41. slider; 5. metal roller shutter; 51. thermal insulation layer; 11. oil cylinder; 6. metal sheet; 61. rivet; 62. connecting plate; 63. connecting rod; 31. guide roller 1; 32. guide roller 2; 52. hanging ring; 7. triangular baffle; 71. hook. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 The utility model is described in further detail.

[0031] Reference Figure 1 , is a heating device for quenching steel plates disclosed in the utility model, comprising a heating furnace 1, a furnace door 2 slidably arranged on the heating furnace 1, brackets 3 and slide rails 4 are fixed on both sides of the heating furnace 1, the slide rails 4 have an arc-shaped curved section, the curved section is located at the front corner of the heating furnace 1, and the slide rails 4 are arranged close to the heating furnace 1. The switch drive structure of the furnace door 2 is the prior art and is not shown in the figure. There are two groups of slide rails 4 distributed up and down, and they are symmetrically distributed up and down.

[0032] Reference Figure 1 and Figure 2 , a plurality of sliders 41 are slidably arranged in the slide rail 4, and the plurality of sliders 41 are connected to the same metal rolling curtain 5. A heat insulating layer 51 is fixed to the side of the metal rolling curtain 5 facing the heating furnace 1, and the metal rolling curtain 5 and the heat insulating layer 51 are partially shielded from the furnace door 2. The structure of the metal rolling curtain 5 is similar to that of the rolling door, and the heat insulating layer 51 is made of existing fireproof and heat insulating materials. The heat insulating layer 51 is a flexible material or can be bent and deformed, such as fireproof cotton or asbestos mesh layer. The slider 41 is a T-block, and a T-slot adapted to the sliding of the slider 41 is provided inside the slide rail 4. The width of the T-slot is greater than the width of the T-block at the corresponding position. Since the slide rail 4 has an arc section, the wider T-slot can avoid jamming when the slider 41 slides.

[0033] The side wall of the heating furnace 1 is fixed with an oil cylinder 11, the output end of the oil cylinder 11 is fixed to the metal rolling curtain 5, and the oil cylinder 11 is used to push the metal rolling curtain 5 to slide along the slide rail 4. The oil cylinder 11 is installed on both sides of the heating furnace 1 to drive the corresponding metal rolling curtain 5 to move.

[0034] Metal sheets 6 are provided at both upper and lower ends of the front and back sides of the metal rolling curtain 5. The metal rolling curtain 5 is sandwiched between the two metal sheets 6. The metal sheets 6 and the metal rolling curtain 5 are fixed by rivets 61. The metal sheets 6 are thin sheets that can bend and deform as the metal rolling curtain 5 bends. The metal sheets 6 can protect the upper and lower ends of the metal rolling curtain 5 by wrapping edges to prevent the upper and lower ends of the metal rolling curtain 5 from cracking and damage. By fixing the rivets 61, the metal sheets 6 and the metal rolling curtain 5 can be firmly fixed to prevent separation.

[0035] The connection structure between the slider 41 and the metal rolling curtain 5 is as follows: a plurality of connecting plates 62 are fixed on the top of the metal sheet 6, and the connecting plates 62 are spaced apart along the length direction of the metal sheet 6, and the connecting plates 62 are fixed to the metal sheet 6 by welding. The connecting plates 62 are rotatably provided with connecting rods 63, and the connecting rods 63 are correspondingly fixed to the slider 41. Through the rotatable connection between the connecting rods 63 and the connecting plates 62, the two can rotate adaptively, further preventing the metal rolling curtain 5 from being stuck during the sliding process.

[0036] Reference Figure 1 and Figure 3 The bracket 3 is located at the corners on both sides of the front of the heating furnace 1. The bracket 3 is rotatably provided with a guide roller 1 31, which is located inside the curved section of the heat insulation layer 51. The guide roller 1 31 is in rolling contact with the heat insulation layer 51. The bracket 3 is also rotatably provided with a guide roller 2 32, which is in rolling contact with the metal rolling curtain 5. The metal rolling curtain 5 and the heat insulation layer 51 are sandwiched between the guide roller 1 31 and the guide roller 2 32. Through the cooperation of the guide roller 1 31 and the guide roller 2 32, the curved section of the metal rolling curtain 5 and the heat insulation layer 51 can be guided to make their movement stable.

[0037] Reference Figure 1 A plurality of hanging rings 52 are fixed on the front of the metal rolling curtain 5. A triangular baffle 7 is arranged on the front of the metal rolling curtain 5. The material of the triangular baffle 7 is any fireproof and heat-insulating material in the prior art. A hook 71 cooperating with the hanging ring 52 is fixed on the back of the triangular baffle 7. The hanging ring 52 is located at the end of the metal rolling curtain 5 close to the furnace door 2. The hanging ring 52 is distributed along the height direction of the metal rolling curtain 5. The hook 71 is located at the edge of the triangular baffle 7. The hook 71 of the triangular baffle 7 is hung on the hanging ring 52, so that the triangular baffle 7 can be attached to the metal rolling curtain 5. The height position of the triangular baffle 7 can be flexibly adjusted. Part of the triangular baffle 7 protrudes outside the metal rolling curtain 5, which is used to block the top corner position of the opening of the heating furnace 1.

[0038] The implementation principle of the heating device for quenching steel plates is as follows: when the heating furnace 1 is loading and unloading steel plates, the furnace door 2 is opened to a suitable height so that the opening height of the heating furnace 1 is just enough for the steel plates to enter. The steel plates are transported in and out of the heating furnace 1 by external pulleys, conveyor belts or hoists, which will not be elaborated here.

[0039] Personnel controls the oil cylinder 11 to extend and retract. Under the guidance of the slide rail 4, the oil cylinder 11 pushes the metal roller shutter 5 and the thermal insulation layer 51 to move. In the curved section of the slide rail 4, the metal roller shutter 5 and the thermal insulation layer 51 produce corresponding bending deformation, so that the metal roller shutter 5 and the thermal insulation layer 51 move away from the end of the oil cylinder 11 to the front opening of the heating furnace 1. The oil cylinders 11 on the left and right sides of the heating furnace 1 can be controlled separately, so as to control the two metal roller shutters 5 to block different degrees on both sides of the opening of the heating furnace 1, so that the space between the two metal roller shutters 5 can just allow steel plate materials to pass through, thereby greatly reducing the opening size of the heating furnace 1, reducing the heat leakage inside the heating furnace 1, and having the effect of reducing energy consumption. On the other hand, it avoids the temperature of the quenching pool near the heating furnace 1 from rising too fast, so that the subsequent quenching program can run continuously and stably.

[0040] In addition, the heating device adopts a flexible metal roller curtain 5 and a heat insulation layer 51, which are always close to the heating furnace 1, thereby reducing the space occupied outside the side wall of the heating furnace 1, reducing site occupancy, and making it easier to arrange items on the site.

[0041] Personnel can adjust the position of the triangular baffle 7 on the metal roller shutter 5 to block the top corner of the opening of the heating furnace 1. The position of the triangular baffle 7 must ensure that it does not affect the steel plate workpiece entering and exiting the heating furnace 1. The triangular baffle 7 further reduces the size of the opening of the heating furnace 1 and improves the shielding effect.

[0042] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A heating device for quenching a steel plate, comprising a heating furnace (1) and a furnace door (2) slidably arranged on the heating furnace (1), wherein: A bracket (3) and a slide rail (4) are fixed on both the left and right sides of the heating furnace (1); the slide rail (4) has an arc-shaped curved section; a plurality of sliders (41) are slidably arranged in the slide rail (4); the plurality of sliders (41) are connected to the same metal rolling curtain (5); a heat insulating layer (51) is fixed on the side of the metal rolling curtain (5) facing the heating furnace (1); an oil cylinder (11) is fixed on the side wall of the heating furnace (1); and an output end of the oil cylinder (11) is fixed to the metal rolling curtain (5).

2. The heating device for quenching a steel plate according to claim 1, characterized in that: The slide rails (4) are provided with two groups distributed vertically and symmetrically, the sliders (41) are T-shaped blocks, the slide rails (4) are provided with T-shaped slots slidably matched with the sliders (41), and the slot width of the T-shaped slots is greater than the width of the T-shaped blocks at the corresponding positions.

3. The heating device for quenching a steel plate according to claim 2, characterized in that: Metal sheets (6) are provided at both upper and lower ends of the front and back sides of the metal rolling curtain (5); the metal rolling curtain (5) is sandwiched between two metal sheets (6); and the metal sheets (6) and the metal rolling curtain (5) are fixed by rivets (61).

4. The heating device for quenching a steel plate according to claim 3, characterized in that: A plurality of connecting plates (62) are fixed on the top of the metal sheet (6), and connecting rods (63) are rotatably provided on the connecting plates (62), and the connecting rods (63) are fixed correspondingly to the sliders (41).

5. The heating device for quenching a steel plate according to claim 1, characterized in that: The bracket (3) is rotatably provided with a guide roller (31), the guide roller (31) is located inside the curved section of the heat insulation layer (51), and the guide roller (31) is in rolling contact with the heat insulation layer (51).

6. The heating device for quenching a steel plate according to claim 5, characterized in that: The bracket (3) is rotatably provided with a second guide roller (32), the second guide roller (32) is in rolling contact with the metal rolling curtain (5), and the metal rolling curtain (5) and the heat insulation layer (51) are sandwiched between the first guide roller (31) and the second guide roller (32).

7. The heating device for quenching a steel plate according to claim 1, characterized in that: A plurality of hanging rings (52) are fixed on the front of the metal rolling curtain (5), a triangular baffle (7) is provided on the front of the metal rolling curtain (5), and a hook (71) matching with the hanging rings (52) is fixed on the back of the triangular baffle (7).

8. The heating device for quenching a steel plate according to claim 7, characterized in that: The hanging rings (52) are distributed along the height direction of the metal rolling curtain (5), and the hooks (71) are located at the edge of the triangular baffle (7).

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