Air knife device for air cushion furnace

Abstract

The invention relates to the technical field of industrial heat treatment, and discloses an air knife device for an air cushion furnace, which comprises an air cushion furnace shell, a quenching area and a cooling area are arranged in the air cushion furnace shell, a partition plate is arranged between the quenching area and the cooling area, the partition plate is mounted at the side part of the air cushion furnace, and the air cushion furnace shell is internally provided with an air inlet and an air outlet. A plurality of rolling wheels used for conveying metal sheets and a plurality of air nozzles used for supporting the metal sheets are installed on the side portion of the air cushion furnace shell, penetrating holes are formed in the partition plate, air knife mechanisms are symmetrically installed on the partition plate, and each air knife mechanism comprises two air knife plates used for spraying air out of an air wall and driving racks installed on the two sides of the partition plate in a sliding mode. Longitudinal adjusting blocks are connected between the two driving racks and the two air knife plates respectively. The servo motor is matched with the driving gear to drive the air knife plates to be automatically and synchronously adjusted up and down, airflow borne by metal sheets is more uniform when the metal sheets pass through the air knife plates, vibration is reduced, and therefore the machining quality of the air cushion furnace is improved.

Description

Technical Field

[0001] The invention relates to the technical field of industrial heat treatment, in particular to an air knife device for an air cushion furnace. Background Art

[0002] Air cushion furnace is an industrial equipment used for metal heat treatment, mainly used to heat and treat metal materials to improve their physical and chemical properties. This furnace adopts air cushion technology to suspend the workpiece through air flow, reducing its contact with the furnace bottom or other parts, thereby avoiding uneven heat conduction and contamination caused by direct contact. The air flow in the air cushion furnace generates high-pressure airflow through the nozzle system to suspend the workpiece in the furnace.

[0003] The air knife device for air cushion furnace is usually installed at the entrance or exit of the air cushion furnace or in the preheating area, and works in conjunction with the transmission device in the furnace. By spraying the air wall, the device can not only ensure the surface cleanliness of the workpiece before entering the furnace or after leaving the furnace, but also effectively isolate the temperature distribution in different areas of the furnace, reducing the impact of temperature fluctuations on the heat treatment effect of the workpiece. This isolation technology performs particularly well in high temperature environments because it can maintain the stability and consistency of the airflow while preventing the intrusion of cold air from the outside and maintaining the heat in the furnace.

[0004] There is an air knife device for an air cushion furnace with a publication number of CN206646144U, which includes a frame, an air knife with a fan interface and an exhaust gap, and the air knife can be slidably arranged on the frame. The adjustable air knife device provided by the present invention can well isolate the heating zone and the quenching zone of the furnace; by adjusting the distance between the air knife and the aluminum strip, the vibration of the aluminum strip can be effectively prevented, and the product performance is more stable; it prevents cold air or water from running onto the aluminum strip being heated during quenching and causing pre-cooling of the aluminum strip; thereby ensuring the heat treatment performance of the product, but the device needs to be manually adjusted up and down by turning the nut when in use, but manual adjustment may result in inconsistent up and down adjustments, resulting in inconsistent up and down distances of the air knife plate, and the metal sheet may vibrate when passing through, affecting the processing of the metal sheet; therefore, it does not meet the existing needs, and we propose an air knife device for an air cushion furnace. Summary of the invention

[0005] The present invention provides an air knife device for an air cushion furnace, which has the beneficial effect of uniformly adjusting the up and down moving distance of the air knife, and solves the problem mentioned in the above background technology that manual adjustment may result in inconsistent up and down adjustments, thereby causing the up and down distances of the air knife plate to be inconsistent, and the metal sheet may vibrate when passing through, thereby affecting the processing of the metal sheet.

[0006] The present invention provides the following technical solution: an air knife device for an air cushion furnace, comprising an air cushion furnace shell, a quenching zone and a cooling zone are arranged inside the air cushion furnace shell, a partition is arranged between the quenching zone and the cooling zone, the partition is installed on the side of the air cushion furnace, a plurality of rollers for transmitting metal sheets and a plurality of air jets for supporting metal sheets are installed on the side of the air cushion furnace shell, a perforation is opened on the partition, and an air knife mechanism is symmetrically installed on the partition, the air knife mechanism includes two air knife plates for spraying air walls, and a driving rack slidably installed on both sides of the partition, and longitudinal adjustment blocks are connected between the two driving racks and the two air knife plates respectively.

[0007] As an optional solution of the air knife device for an air cushion furnace described in the present invention, wherein: a dustproof box is installed on the side of the partition, and three driving gears are arranged inside the dustproof box, a through groove for the movement of the driving rack is opened at the bottom of the dustproof box, a servo motor for driving gears is installed on the outside of the dustproof box, the three driving gears are meshed for transmission, the driving gears located at both ends are respectively meshed with the adjacent driving racks, and the driving rack adjacent to the servo motor controls the movement of the air knife plate below.

[0008] As an optional solution of the air knife device for an air cushion furnace described in the present invention, wherein: the longitudinal adjustment block is slidably mounted on the side of the partition, a limiting groove is provided on the side of the partition, a damping tube for slowing down the movement of the air knife plate is installed inside the limiting groove, a plurality of spacers are installed inside the damping tube, air holes are provided on the surface of the spacer block, a sliding block slidably engaged with the sliding limiting groove is fixedly mounted on the side of the longitudinal adjustment block, a pulley is installed on the side of the sliding block, and the pulley is slidably engaged with the damping tube.

[0009] As an optional solution of an air knife device for an air cushion furnace described in the present invention, wherein: an air knife cavity and a driving groove are respectively opened inside the air knife plate, an air outlet nozzle is arranged on the side of the air knife plate adjacent to the metal sheet, an air inlet is arranged inside the air knife plate, the air inlet, the air knife cavity and the air outlet nozzle are communicated, a transverse adjustment plate is arranged inside the air knife cavity, wedge blocks are connected at both ends of the transverse adjustment plate, and a wedge groove is arranged on the inner wall of the air knife cavity for sliding engagement with the wedge block.

[0010] As an optional scheme of an air knife device for an air cushion furnace described in the present invention, wherein: an adjusting disk is rotatably installed inside the driving groove, a worm is rotatably installed on the side of the air knife plate, the worm is transmission connected to the side of the adjusting disk, a slot is provided on the inner wall of the driving groove, a block slidably engaged with the slot is connected to the side of the adjusting disk, an adjusting groove is provided on the side of the adjusting disk, and the bottom surface of the adjusting groove is spirally arranged.

[0011] As an optional solution of the air knife device for an air cushion furnace described in the present invention, a driving column is fixedly connected to the side of the lateral adjustment plate, and the end of the driving column is slidably engaged in the interior of the adjustment groove.

[0012] As an optional scheme of an air knife device for an air cushion furnace described in the present invention, wherein: the middle part of the lateral adjustment plate is rotatably connected to a support column, the side of the support column is connected to a limiting column, the middle part of the support column is set as a threaded section, the inner wall of the air knife plate is provided with a threaded hole threadedly connected to the support column, the inside of the adjustment disk is provided with a sliding groove, the side of the adjustment disk is also provided with a limiting groove, the sliding groove is connected to the limiting groove, the support column is slidably engaged with the sliding groove, and the limiting column is slidably engaged with the limiting groove.

[0013] As an optional solution of an air knife device for an air cushion furnace described in the present invention, wherein: a connecting column is connected to the side of the adjusting disk, a driving assembly is arranged inside the driving groove, the driving assembly includes a worm gear installed at the end of the connecting column, and a support frame installed on the side of the air knife plate, the worm is rotatably installed inside the support frame, and the worm is meshed with the worm gear for transmission.

[0014] As an optional solution of the air knife device for an air cushion furnace described in the present invention, wherein: a fixing rod is coaxially connected to the side of the worm, a fixing plate is connected to the end of the fixing rod, and a handle is eccentrically installed on the fixing plate.

[0015] As an optional solution of an air knife device for an air cushion furnace described in the present invention, wherein: a rotating rod is connected between the fixed rod and the fixed plate, the rotating rod is rotatably connected to the fixed rod, the rotating rod is fixedly connected to the fixed plate, a spiral spring is installed between the rotating rods, one end of the spiral spring is connected to a first connecting plate, the other end of the spiral spring is connected to a second connecting plate, the first connecting plate is connected to the side of the fixed rod, and the second connecting plate is connected to the side of the rotating rod.

[0016] The present invention has the following beneficial effects:

[0017] 1. The air knife device for the air cushion furnace, through the setting of the driving rack and the driving gear, the servo motor cooperates with the driving gear to drive the two driving racks and the longitudinal adjustment blocks on the sides of the two racks respectively, and drive the air knife plate to automatically and synchronously adjust up and down. Since the two air knife plates maintain the same height during the adjustment process, the airflow received by the metal sheet when passing through will be more uniform. This can reduce vibration and reduce processing defects caused by vibration, thereby improving the processing quality of the air cushion furnace.

[0018] 2. The air knife device for the air cushion furnace, through the setting of the driving component, manually or automatically drives the handle to rotate, the fixed disk rotates to rotate the adjusting disk, the driving column cooperates with the adjusting disk, and since the adjusting groove is a spiral groove, the distance between the bottom surface of the groove and the surface of the adjusting disk is different at different positions, so the driving column will be driven to move left and right, thereby changing the distance between the lateral adjustment plate and the inner wall of the air knife cavity, and driving the support column to rotate through the sliding groove inside the adjusting disk, so that the middle part of the support column is threadedly connected to the threaded hole, thereby stably pushing the lateral adjustment plate to move. This adjustment range provides adaptability to workpieces of different sizes and shapes, improves the versatility of the air knife device for the air cushion furnace, and reduces the cost of use.

[0019] 3. The air knife device for the air cushion furnace, through the setting of the spiral spring, when the handle is turned manually or automatically, the spiral spring is retracted. When the spiral spring is retracted within the predetermined range, the handle will not drive the fixed rod, thereby effectively preventing unintentional misoperation. It reduces equipment adjustment errors caused by human errors and ensures the stability of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the cross-section structure of the air cushion furnace shell of the present invention.

[0021] Figure 2 It is a schematic front view of the three-dimensional structure of the air knife mechanism of the present invention.

[0022] Figure 3 For the present invention Figure 2 A is an enlarged structural diagram of FIG.

[0023] Figure 4 It is a rear perspective structural schematic diagram of the air knife mechanism of the present invention.

[0024] Figure 5 It is a schematic diagram of the cross-section structure of the air knife plate of the present invention.

[0025] Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged structure at B.

[0026] Figure 7 It is a schematic diagram of the structure of the adjustment tank of the present invention.

[0027] Figure 8 It is a schematic diagram of the cross-section structure of the adjustment disk of the present invention.

[0028] Fig. 9 It is a schematic diagram of the side structure of the air knife plate of the present invention.

[0029] Fig.10 It is a schematic diagram of the spiral spring structure of the present invention.

[0030] Fig.11 It is a schematic diagram of the cutaway structure of the damping tube of the present invention.

[0031] In the figure: 110, air cushion furnace shell; 111, quenching zone; 112, cooling zone; 113, partition; 114, roller; 115, air jet; 120, perforation; 130, air knife mechanism; 131, air knife plate; 132, longitudinal adjustment block; 133, drive rack; 134, dust box; 135, drive gear; 140, through slot; 141, servo motor; 142, limit slot; 143, damping tube; 144, partition; 145, air hole; 150, slider; 151, pulley; 152, air knife chamber; 154, air inlet; 155, air outlet nozzle; 160, transverse adjustment Section plate; 161, wedge block; 162, wedge groove; 163, drive groove; 171, adjustment plate; 172, clamping block; 173, clamping groove; 174, adjustment groove; 175, drive column; 180, threaded hole; 181, support column; 182, sliding groove; 183, limit column; 184, limit groove; 186, drive assembly; 190, connecting column; 191, worm gear; 192, worm; 193, supporting frame; 194, fixing rod; 195, rotating rod; 210, fixing plate; 211, handle; 212, scroll spring; 213, first connecting plate; 220, second connecting plate. DETAILED DESCRIPTION

[0032] 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 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 creative work are within the scope of protection of the present invention.

[0033] Embodiment 1: This embodiment is intended to solve the problem that manual adjustment may cause inconsistency in the upper and lower adjustments, which may lead to the problem that the upper and lower distances of the air knife plate 131 are not uniform, and the metal sheet may vibrate when passing through, affecting the processing of the metal sheet. Please refer to Figure 1-11, an air knife device for an air cushion furnace, comprising an air cushion furnace shell 110, a quenching zone 111 and a cooling zone 112 are arranged inside the air cushion furnace shell 110, a partition 113 is arranged between the quenching zone 111 and the cooling zone 112, the partition 113 is installed on the side of the air cushion furnace, a plurality of rollers 114 for transmitting metal sheets and a plurality of air jets 115 for supporting the metal sheets are installed on the side of the air cushion furnace shell 110, a through hole 120 is opened on the partition 113, and an air knife mechanism 130 is symmetrically installed on the partition 113, the air knife mechanism 130 includes two air knife plates 131 for ejecting air walls, and a driving rack 133 slidably installed on both sides of the partition 113, and the two driving racks 133 are respectively connected to the two air knife plates 131 with longitudinal adjustment blocks 132.

[0034] See Figure 4 A dustproof box 134 and three driving gears 135 are installed on the side of the partition 113. A through groove 140 for the driving rack 133 to move is opened at the bottom of the dustproof box 134. A servo motor 141 for driving the gear 135 is installed on the outside of the dustproof box 134. The three driving gears 135 are meshed for transmission. The driving gears 135 located at both ends are respectively meshed with adjacent driving racks 133. The driving rack 133 adjacent to the servo motor 141 controls the movement of the air knife plate 131 below; the driving rack 133 away from the servo motor 141 controls the movement of the air knife plate 131 above.

[0035] During operation, the servo motor 141 is started, and the servo motor 141 drives the driving gear 135 close to the servo motor 141 to rotate. The left side of the driving gear 135 engages with the driving rack 133 and moves. At the same time, the driving gear 135 far away from the servo motor 141 rotates in the same direction due to the influence of the middle driving gear 135, so that the two driving racks 133 move in opposite directions at the same time, thereby achieving the effect of automatically controlling the synchronous up and down movement of the air knife plate 131.

[0036] See Figure 3 The longitudinal adjustment block 132 is slidably mounted on the side of the partition 113. A limiting groove 142 is provided on the side of the partition 113. A damping tube 143 for slowing down the movement of the air knife plate 131 is installed inside the limiting groove 142. A plurality of partitions 144 are installed inside the damping tube 143. Air holes 145 are provided on the surface of the partitions 144. A slider 150 slidably engaged with the limiting groove 142 is fixedly mounted on the side of the longitudinal adjustment block 132. A pulley 151 is installed on the side of the slider 150. The pulley 151 is slidably engaged with the damping tube 143. The damping tube 143 is set as a rubber tube.

[0037] By installing the damping tube 143 inside the limiting groove 142, opening a spacer block 144 inside the damping tube 143, and opening an air hole 145 in the middle of the spacer block 144, when the longitudinal adjustment block 132 slides on the side of the partition 113, the pulley 151 slides with the side of the damping tube 143, and when the pulley 151 slides, force is applied to the damping tube 143. The air inside the damping tube 143 flows to the next section along the air hole 145, increasing the resistance of the pulley 151, thereby causing the longitudinal adjustment block 132 to move slowly.

[0038] In this embodiment: by setting the driving rack 133 and the driving gear 135, the servo motor 141 is started, and the servo motor 141 drives the driving gear 135 connected to the output shaft key of the servo motor 141 to rotate, and the driving gear 135 close to the servo motor 141 is meshed with the driving rack 133 close to the servo motor 141, driving the lower air knife plate 131 to move, and the driving gear 135 is meshed with the middle driving gear 135 to rotate, and the middle driving gear 135 is meshed with the driving gear 135 far away from the servo motor 141 to rotate, and the driving gear 135 far away from the servo motor 141 is meshed with the driving rack 133 far away from the servo motor 141, driving the upper air knife plate 131 to move, and realizing automatic control of the distance between the two air knife plates 131 to be synchronously reduced, and the servo motor 141 is reversed, so as to realize automatic control of the distance between the two air knife plates 131 to be synchronously increased. Since the two air knife plates 131 maintain a consistent height during the adjustment process, the airflow to the metal sheet when passing through will be more uniform. This can reduce vibration and machining defects caused by vibration, thereby improving the machining quality of the air cushion furnace.

[0039] Embodiment 2: This embodiment is intended to solve the problem that the width of the air wall needs to be adjusted during the heat treatment of metal sheets of different models to ensure the heat insulation effect of the air wall and avoid the problem of resource waste. This embodiment is an improvement made on the basis of Embodiment 1. For details, please refer to Figure 1-11 An air knife chamber 152 and a driving groove 163 are respectively provided inside the air knife plate 131, an air outlet nozzle 155 is provided on the side of the air knife plate 131 adjacent to the metal sheet, an air inlet 154 is provided inside the air knife plate 131, the air inlet 154, the air knife chamber 152 and the air outlet nozzle 155 are communicated, a transverse adjustment plate 160 is provided inside the air knife chamber 152, wedge blocks 161 are connected to both ends of the transverse adjustment plate 160, a wedge groove 162 that slides and engages with the wedge block 161 is provided on the inner wall of the air knife chamber 152, and the transverse adjustment plate 160 is configured as a piston plate that slides and fits with the air knife chamber 152.

[0040] See Figure 5 , Figure 7 and Figure 8An adjusting disk 171 is rotatably installed inside the driving groove 163, a worm 192 is rotatably installed on the side of the air knife plate 131, and the worm 192 is drivingly connected to the side of the adjusting disk 171. A card slot 173 is provided on the inner wall of the driving groove 163, and a card block 172 that slides and engages with the card slot 173 is connected to the side of the adjusting disk 171. An adjusting groove 174 is provided on the side of the adjusting disk 171, and the bottom surface of the adjusting groove 174 is spirally arranged, so the adjusting groove 174 is deep at one end and shallow at the other end.

[0041] The side of the transverse adjustment plate 160 is fixedly connected with a driving column 175, and the end of the driving column 175 is slidably engaged in the inside of the adjustment groove 174. In specific operation, the handle 211 is manually turned, and the handle 211 drives the fixed plate 210 and the fixed rod 194 on the side of the fixed plate 210 to rotate, and the rotation of the fixed rod 194 drives the adjustment plate 171 to rotate, and at the same time drives the adjustment groove 174 on the side of the adjustment plate 171 to move; the adjustment groove 174 is a spiral groove, and since the contact surface between the adjustment groove 174 and the driving column 175 is changed when the adjustment plate 171 is rotated, the driving column 175 will be driven to move left and right, thereby changing the distance between the transverse adjustment plate 160 and the inner wall of the air knife chamber 152.

[0042] In order to better cope with the compressed air in the air knife chamber 152, the lateral adjustment plate 160 needs to be more stable. Figure 5 A support column 181 is rotatably connected to the middle part of the lateral adjustment plate 160, and a limiting column 183 is connected to the side of the support column 181. The middle part of the support column 181 is set as a threaded section, and a threaded hole 180 threadedly connected to the support column 181 is provided on the inner wall of the air knife plate 131. A sliding groove 182 is provided inside the adjustment disk 171, and a limiting groove 184 is also provided on the side of the adjustment disk 171. The sliding groove 182 is connected to the limiting groove 184, the support column 181 is slidably engaged with the sliding groove 182, and the limiting column 183 is slidably engaged with the limiting groove 184.

[0043] Since the limiting column 183 is engaged with the limiting groove 184 inside the adjusting disk 171, when the adjusting disk 171 rotates, the adjusting disk 171 drives the supporting column 181 to rotate, and cooperates with the threaded connection between the middle part of the supporting column 181 and the threaded hole to realize the lateral movement of the supporting column 181 while rotating, thereby pushing the lateral adjustment plate 160 to move simultaneously with the driving column 175.

[0044] In this embodiment, the driving of the fixing rod 194 can also be set to be electric driving or driving by other automated devices.

[0045] In this embodiment: through the setting of the driving component 186, the handle 211 is driven manually or automatically to rotate, and the fixed disk 210 rotates to drive the adjusting disk 171 and the slider 150 on the side of the adjusting disk 171 to rotate inside the sliding groove. When the adjusting disk 171 rotates, it drives the adjusting groove 174 on the side of the adjusting disk 171 to move; since the adjusting groove 174 is a spiral groove, the distance between the bottom surface of the groove and the surface of the adjusting disk 171 at different positions is different, so the driving column 175 will be driven to move left and right, thereby changing the distance between the lateral adjustment plate 160 and the inner wall of the air knife chamber 152. This adjustment range provides adaptability to workpieces of different sizes and shapes, improves the versatility of the air knife device of the air cushion furnace, and reduces the cost of use.

[0046] Moreover, the limiting column 183 is engaged with the limiting groove 184 inside the adjusting disk 171, and the sliding groove inside the adjusting disk 171 drives the supporting column 181 to rotate, so that the middle part of the supporting column 181 is threadedly connected to the threaded hole, thereby stably pushing the lateral adjustment plate 160 to move, changing the distance between the lateral adjustment plate 160 and the inner wall of the air knife chamber 152, and further improving the stability and reliability of the lateral adjustment plate 160.

[0047] Embodiment 3: This embodiment is intended to promote the solution of the problem of accidentally touching the handle 211 or misoperation and affecting the width of the air knife cavity 152. This embodiment is an improvement made on the basis of embodiment 2. For details, please refer to Figure 1-11 A connecting column 190 is connected to the side of the adjusting disk 171, and a driving assembly 186 is arranged inside the driving groove 163. The driving assembly 186 includes a worm wheel 191 installed at the end of the connecting column 190, and a support frame 193 installed on the side of the air knife plate 131. The worm 192 is rotatably installed inside the support frame 193. The worm 192 is meshed with the worm wheel 191 for transmission. A fixing rod 194 is coaxially connected to the side of the worm 192. A fixing disk 210 is connected to the end of the fixing rod 194. A handle 211 is eccentrically installed on the fixing disk 210.

[0048] Because when the worm wheel 191 and the worm 192 are meshed, the helix angle of the worm 192 is less than 30°, and the groove depth of the worm 192 is relatively large, the friction force can be effectively offset, and self-locking can be achieved to avoid the reversal of the worm wheel 191.

[0049] Moreover, in order to prevent the worm wheel 191 from rotating in the correct direction when the rotation direction is correct when the worm wheel 191 is accidentally touched, a rotating rod 195 is connected between the fixed rod 194 and the fixed disk 210, the rotating rod 195 is rotatably connected to the fixed rod 194, the rotating rod 195 is fixedly connected to the fixed disk 210, and a spiral spring 212 is installed between the rotating rods 195, one end of the spiral spring 212 is connected to a first connecting plate 213, and the other end of the spiral spring 212 is connected to a second connecting plate 220, the first connecting plate 213 is connected to the side of the fixed rod 194, and the second connecting plate 220 is connected to the side of the rotating rod 195.

[0050] When the handle 211 is turned, the handle 211 drives the fixed disk 210 and the rotating rod 195 on the side of the fixed disk 210 to rotate outside the fixed rod 194, thereby retracting the spiral spring 212. During the retraction process of the spiral spring 212, the rotation of the handle 211 will not drive the fixed rod 194, thereby avoiding the height adjustment of the air knife chamber 152 inadvertently or by mistake. Only after the spiral spring 212 is completely retracted, the handle 211 will continue to be turned to drive the fixed rod 194 to rotate and achieve driving.

[0051] In this embodiment, through the setting of the spiral spring 212, when the handle 211 is driven to rotate manually or automatically, the handle 211 drives the fixed disk 210 and the rotating rod 195 on the side of the fixed disk 210 to rotate outside the fixed rod 194, thereby retracting the spiral spring 212. When the spiral spring 212 is retracted within a predetermined range, the rotation of the handle 211 will not drive the fixed rod 194, thereby effectively preventing unintentional misoperation. The equipment adjustment errors caused by human errors are reduced, and the stability of the production line is ensured.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An air knife device for an air cushion furnace, comprising an air cushion furnace shell (110), wherein a quenching zone (111) and a cooling zone (112) are arranged inside the air cushion furnace shell (110), a partition (113) is arranged between the quenching zone (111) and the cooling zone (112), and the partition (113) is installed on the side of the air cushion furnace, and a plurality of rollers (114) for conveying metal sheets and a plurality of air jets (115) for supporting the metal sheets are installed on the side of the air cushion furnace shell (110), characterized in that: The partition (113) is provided with a through hole (120), and an air knife mechanism (130) is symmetrically mounted on the partition (113), the air knife mechanism (130) comprising two air knife plates (131) for spraying air walls, and a driving rack (133) slidably mounted on both sides of the partition (113), and longitudinal adjustment blocks (132) are respectively connected between the two driving racks (133) and the two air knife plates (131).

2. The air knife device for an air cushion furnace according to claim 1, characterized in that: A dustproof box (134) and three driving gears (135) are installed on the side of the partition (113). A through groove (140) for the driving rack (133) to move is opened at the bottom of the dustproof box (134). A servo motor (141) for driving the gear (135) is installed on the outside of the dustproof box (134). The three driving gears (135) are meshed for transmission. The driving gears (135) located at both ends are respectively meshed with the adjacent driving racks (133). The driving rack (133) adjacent to the servo motor (141) controls the movement of the air knife plate (131) below.

3. The air knife device for an air cushion furnace according to claim 1, characterized in that: The longitudinal adjustment block (132) is slidably mounted on the side of the partition (113); a limiting groove (142) is provided on the side of the partition (113); a damping tube (143) for slowing down the movement of the air knife plate (131) is installed inside the limiting groove (142); a plurality of partition blocks (144) are installed inside the damping tube (143); air holes (145) are provided on the surface of the partition blocks (144); a slider (150) slidably engaged with the limiting groove (142) is fixedly mounted on the side of the longitudinal adjustment block (132); a pulley (151) is installed on the side of the slider (150); the pulley (151) is slidably engaged with the damping tube (143).

4. The air knife device for an air cushion furnace according to claim 1, characterized in that: An air knife chamber (152) and a driving groove (163) are respectively provided inside the air knife plate (131); an air outlet nozzle (155) is provided on one side of the air knife plate (131) adjacent to the metal sheet; an air inlet (154) is provided inside the air knife plate (131); the air inlet (154), the air knife chamber (152) and the air outlet nozzle (155) are in communication; a transverse adjustment plate (160) is provided inside the air knife chamber (152); wedge blocks (161) are connected to both ends of the transverse adjustment plate (160); and a wedge groove (162) is provided on the inner wall of the air knife chamber (152) for sliding engagement with the wedge block (161).

5. The air knife device for an air cushion furnace according to claim 4, characterized in that: An adjusting disk (171) is rotatably mounted inside the driving groove (163), a worm (192) is rotatably mounted on the side of the air knife plate (131), the worm (192) is drivingly connected to the side of the adjusting disk (171), a clamping groove (173) is provided on the inner wall of the driving groove (163), a clamping block (172) slidably engaged with the clamping groove (173) is connected to the side of the adjusting disk (171), an adjusting groove (174) is provided on the side of the adjusting disk (171), and the bottom surface of the adjusting groove (174) is spirally arranged.

6. The air knife device for an air cushion furnace according to claim 5, characterized in that: A driving column (175) is fixedly connected to the side of the transverse adjustment plate (160), and an end of the driving column (175) is slidably engaged in the interior of the adjustment slot (174).

7. The air knife device for an air cushion furnace according to claim 6, characterized in that: The middle part of the lateral adjustment plate (160) is rotatably connected to a support column (181), the side part of the support column (181) is connected to a limiting column (183), the middle part of the support column (181) is arranged as a threaded section, the inner wall of the air knife plate (131) is provided with a threaded hole (180) threadedly connected to the support column (181), the interior of the adjustment disk (171) is provided with a sliding groove (182), the side part of the adjustment disk (171) is also provided with a limiting groove (184), the sliding groove (182) is communicated with the limiting groove (184), the support column (181) is slidably engaged with the sliding groove (182), and the limiting column (183) is slidably engaged with the limiting groove (184).

8. The air knife device for an air cushion furnace according to claim 5, characterized in that: A connecting column (190) is connected to the side of the adjustment disk (171), and a driving assembly (186) is arranged inside the driving groove (163). The driving assembly (186) comprises a worm wheel (191) installed at the end of the connecting column (190), and a support frame (193) installed on the side of the air knife plate (131). The worm (192) is rotatably installed inside the support frame (193), and the worm (192) is meshed with the worm wheel (191) for transmission.

9. The air knife device for an air cushion furnace according to claim 8, characterized in that: The side of the worm (192) is coaxially connected to a fixing rod (194), the end of the fixing rod (194) is connected to a fixing disk (210), and the fixing disk (210) is eccentrically mounted with a handle (211).

10. The air knife device for an air cushion furnace according to claim 9, characterized in that: A rotating rod (195) is connected between the fixed rod (194) and the fixed disk (210); the rotating rod (195) is rotatably connected to the fixed rod (194); the rotating rod (195) is fixedly connected to the fixed disk (210); a spiral spring (212) is installed between the rotating rods (195); one end of the spiral spring (212) is connected to a first connecting plate (213); the other end of the spiral spring (212) is connected to a second connecting plate (220); the first connecting plate (213) is connected to a side of the fixed rod (194); and the second connecting plate (220) is connected to a side of the rotating rod (195).

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