Cooling device of quenching machine

Abstract

The invention provides a quenching machine cooling device, and belongs to the technical field of steel cooling equipment. The device comprises a water inlet, a spray box, a steady flow cavity and a gap water outlet which are connected in sequence, wherein a plurality of through holes are formed in the bottom of the spraying box, the flow stabilizing cavity is a funnel-shaped cavity, the gap outlet is formed by connecting a first plate-shaped structure, a second plate-shaped structure and a replacement plate, a water outlet gap is formed between the bottom of the replacement plate and the upper surface of the first plate-shaped structure, and water flow enters the spraying box of the cooling device from the water supply system; the water flow is equalized by the spraying box and then passes through the funnel-shaped flow stabilizing cavity to further stabilize the flow speed, then the sprayed water is in an ultra-thin blade point shape through the long and narrow gap water outlet and is finally sprayed to the surface of the steel plate, the water flow can be sprayed to the steel plate more uniformly, the steel plate is cooled, the cooling uniformity and stability are greatly improved, and the cooling effect is better. The steel plate bending and deformation are reduced, and the steel plate quality is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel cooling equipment, and particularly relates to a quenching machine cooling device. Background Art

[0002] During the quenching process of steel plates, a quenching machine cooling device is used to achieve synchronous and uniform cooling. The cooling uniformity of the steel plate directly affects the microstructure properties and flatness quality of the steel plate. As an important component of the quenching machine cooling device, the slit nozzle is mainly characterized in that the water flow ejected from it is in a slit shape, which can precisely control the distribution of cooling water, enabling the cooling medium to be continuously distributed along the width direction of the slit without jet breakpoints, achieving a uniform and high-intensity cooling effect. Therefore, its design directly affects the quenching effect and the properties of metal materials. However, the traditional quenching machine slit nozzle has obvious deficiencies in cooling uniformity and stability, and cannot meet the requirements of high-precision quenching processes. Therefore, the present invention designs a quenching machine cooling device, which realizes uniform cooling of the steel plate by structurally designing and parameter optimizing the steady flow section and the slit nozzle. Summary of the Invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a quenching machine cooling device, which can uniformly and controllably cool the steel plate, reduce the internal stress of the steel plate, reduce the camber of the steel plate, and improve the quality of the steel plate.

[0004] The present invention adopts the following technical solutions:

[0005] A quenching machine cooling device includes a water inlet, a spray box, a steady flow cavity, and a slit water outlet;

[0006] The spray box is a horizontally arranged cylindrical structure with both ends closed. The water inlet is connected to the upper surface of the cylindrical wall of the spray box through a mounting flange, and the water inlet is communicated with the spray box;

[0007] A number of equally spaced through holes are arranged along the length direction of the lower surface of the spray box to equalize the flow of water entering the spray box, playing a damping role to avoid the occurrence of water hammer phenomenon caused by concentrated water flow;

[0008] The steady flow cavity is a funnel-shaped chamber composed of a first arc plate and a second arc plate; the first arc plate and the second arc plate have the same structural dimensions, and the two are symmetrically connected to the bottom of the spray box to form a funnel-shaped flow channel for steady flow; the connection points of the two arc plates and the spray box are the tangent points between the arc plates and the circular cylindrical wall of the spray box, and the central angle formed by the connection lines of the center of the spray box and the two tangent points is 60° - 90°;

[0009] The slit water outlet includes a first plate-like structure, a second plate-like structure and a replacement plate; the first plate-like structure is a structure with an L-shaped cross-section composed of a first vertical plate and a first horizontal plate, and the L-shaped bending part has a rounded corner; the first vertical plate is vertically connected to the end of the first arc plate, and the connection point is the tangent point of the first arc plate; a long groove is provided on the upper surface of the first horizontal plate along the length direction; the included angle between the first vertical plate and the first horizontal plate is 100°-115°, and the length ratio of the first vertical plate to the first horizontal plate is 2:1-4:1;

[0010] The second plate-like structure is composed of a second vertical plate and an inclined plate. Among them, the second vertical plate is vertically arranged, and its upper end is connected to the end of the second arc plate, and the connection point is the tangent point of the second arc plate; the lower end of the second vertical plate is connected to the inclined plate, and the distance from the end of the inclined plate to the bending part of the first plate-like structure is 15-25 mm; the included angle between the second vertical plate and the inclined plate is 120°-165°; the length ratio of the second vertical plate to the inclined plate is 1.5:1-2:1;

[0011] The replacement plate is a plate-like structure with an L-shaped cross-section composed of a third vertical plate and a second horizontal plate. The third vertical plate is fitted and installed on the back of the inclined plate of the second plate-like structure. The lower surface of the second horizontal plate is parallel to the upper surface of the first horizontal plate, and a water outlet gap is formed between the lower surface of the second horizontal plate and the long groove of the first horizontal plate. Water flows out continuously along the width direction of the water outlet gap, achieving the effect of uniformly cooling the steel plate.

[0012] Further, there are multiple water inlets, and the multiple water inlets are arranged at equal intervals.

[0013] Further, several through holes on the barrel wall of the lower surface of the spray box are circular with the same diameter.

[0014] Further, a groove is provided at the position where the inclined plate of the second plate-like structure is attached to the replacement plate, and a sealing strip for sealing water is installed in the groove.

[0015] Further, the height of the water outlet gap is adjusted by adjusting the distance between the second horizontal plate of the replacement plate and the long groove of the first horizontal plate; the height of the water outlet gap is 1-3 mm.

[0016] Further, a limiting groove is provided along the length direction on the back of the inclined plate of the second plate-like structure, and the replacement plate is installed in the limiting groove by bolts, and the height of the water outlet gap is adjusted by replacing the replacement plate.

[0017] Further, the cooling device further includes a connecting plate, and the connecting plate is arranged at both ends of the spray box for connecting the spray box to the frame of the quenching machine.

[0018] Compared with the prior art, the present invention has the following advantages: The steady flow section of the quenching machine cooling device of the present invention is an integrated structure composed of a cylindrical spray box and a funnel-shaped cavity. After the water flows through the spray box for even flow, it further stabilizes the flow rate through the funnel-shaped flow channel, which can reduce turbulence, ensure that the water flows smoothly and evenly over the surface of the steel plate, prevent the high-pressure fluid from impacting the surface of the steel plate, and achieve a stable, uniform, and controllable cooling environment; In addition, the present invention designs the internal flow channel and parameters of the nozzle, which can not only make the water flow out stably and evenly in the flow channel, but also ensure that the ejected water flow is continuous. Finally, through the long and narrow water outlet gap, the ejected water is in the shape of an ultra-thin blade, greatly improving the cooling uniformity and stability of the steel plate; Moreover, the present invention has a simple structure and is convenient to disassemble, and the height of the water outlet gap can be adjusted according to the thickness of the steel plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the quenching machine cooling device in the embodiment of the present invention.

[0020] Figure 2 It is a half-sectional view of the quenching machine cooling device in the embodiment of the present invention.

[0021] Figure 3 It is a partial view of the spray box in the embodiment of the present invention.

[0022] Figure 4 It is a sectional view of the quenching machine cooling device in the embodiment of the present invention.

[0023] Figure 5 is Figure 4 a partial enlarged view of I in

[0024] Figure 6 It is a flow field distribution diagram of the traditional method.

[0025] Figure 7 It is a flow field distribution diagram of the embodiment of the present invention.

[0026] Figure 8 It is a flow field velocity distribution diagram of the traditional method.

[0027] Figure 9 It is a flow field velocity distribution diagram of the embodiment of the present invention.

[0028] In the figure: 1 water inlet, 2 spray box, 3 steady flow cavity, 4 connecting plate, 5 through hole, 6 first arc plate, 7 first plate-like structure, 8 second arc plate, 9 second plate-like structure, 10 replacement plate, 11 bolt, 12 sealing strip, 13 first vertical plate, 14 first horizontal plate, 15 second vertical plate, 16 inclined plate, 17 third vertical plate, 18 second horizontal plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] For the convenience of understanding the technical solution, the present invention provides the following embodiments.

[0030] As shown Figure 1 in the figure, this embodiment provides a quenching machine cooling device, which mainly includes a water inlet 1, a connecting plate 4, a spray box 2, a steady flow cavity 3 and a slit water outlet. The overall material is made of 304 stainless steel.

[0031] Among them, the spray box 2 is a horizontally arranged cylindrical structure with closed ends at both ends, with a diameter of 159 mm, a wall thickness of 4.5 mm, and a length of 1800 mm. An inlet 1 is connected to the barrel wall on the upper surface thereof through a mounting flange, and the inlet 1 is communicated with the spray box 2. According to the design requirements, a total of two inlets are designed, and the distance between the two inlets is 700 mm.

[0032] As shown Figure 2 and Figure 3 in the figure, a number of through holes 5 with the same diameter and arranged at equal intervals are provided on the barrel wall of the lower surface of the spray box 2 along the length direction of the spray box 2. Water flows into the cavity from the inlet 1, and the water flow is evenly distributed through the through holes 5 on the spray box, playing a damping role to avoid the concentration of water flow and generating a water hammer phenomenon.

[0033] As shown Figure 4 in the figure, the steady flow cavity 3 is a funnel-shaped chamber composed of a first arc plate 6 and a second arc plate 8. The first arc plate 6 and the second arc plate 8 are both made of heat-resistant steel plates, and have the same structural dimensions. The radius of the circles where the two arcs are located is 110 mm, and the wall thickness of the two arc plates is 4 mm. The two are symmetrically connected to the bottom of the spray box 2 to form a funnel-shaped flow channel for stabilizing the flow rate. The connection points of the two arc plates and the spray box are the tangent points between the arc plates and the circular barrel wall of the spray box, and the central angle formed by connecting the centers of the spray box with the two tangent points is 60°.

[0034] As shown Figure 4 and Figure 5 in the figure, the slit water outlet includes a first plate-like structure 7, a second plate-like structure 9 and a replacement plate 10, all of which are made of heat-resistant steel plates.

[0035] The first plate-like structure 7 is a structure with an L-shaped cross-section composed of a first vertical plate 13 and a first horizontal plate 14, and the L-shaped bending part is rounded. The first vertical plate 13 is vertically arranged and connected to the end of the first arc plate 6, and the connection point is the tangent point of the first arc plate 6. The included angle between the first vertical plate 13 and the first horizontal plate 14 is 110°, the length ratio of the first vertical plate 13 to the first horizontal plate 14 is 2:1, and a long groove is provided on the upper surface of the first horizontal plate 14 along the length direction.

[0036] The second plate-like structure 9 is composed of a second vertical plate 15 and an inclined plate 16. Among them, the second vertical plate 15 is vertically arranged, and its upper end is connected to the end of the second arc plate 8, and the connection point is the tangent point of the second arc plate 8; the distance from the end of the inclined plate 16 to the bending position of the first plate-like structure 7 is 15 mm; a limiting groove is arranged along the length direction on the back surface of the inclined plate 16; the included angle between the second vertical plate 15 and the inclined plate 16 is 145°; the ratio of the plate length of the second vertical plate 15 to the inclined plate 16 is 1.5:1.

[0037] The replacement plate 10 is a plate-like structure with an L-shaped cross-section composed of a third vertical plate 17 and a second horizontal plate 18. The third vertical plate 17 is fitted and installed in the limiting groove on the back surface of the inclined plate of the second plate-like structure 9 through bolts 11. A water outlet gap with a height of 1 mm is formed between the lower surface of the second horizontal plate 18 and the long groove of the first horizontal plate 14. Water flows out continuously along the width direction of the water outlet gap, forming an included angle of 20° with the horizontal plane where the steel plate runs, so as to achieve the effect of uniformly cooling the steel plate. The replacement plate 10 can be disassembled, cleaned and replaced to prevent blockage.

[0038] As Figure 6 shown, it is the flow field distribution diagram of the traditional method. The traditional pipeline layout is that the main pipeline is connected with branch pipelines for each branch below for flow distribution design, which is easy to cause the water flow in the middle area to be dense and generate water hammer phenomenon, and the water supply in the edge parts on both sides is also prone to be insufficient; as Figure 7 shown, the structure designed by the present invention significantly improves this phenomenon.

[0039] As Figure 8 shown, the spray box of the traditional method has a slow response and large water flow fluctuations, and the deviation value of the average flow velocity is ±4.8%; as Figure 9 shown, in this embodiment, the spray box has a fast response, small water flow fluctuations, and the deviation value of the average flow velocity is within ±3.0%.

[0040] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A quenching machine cooling device, characterized in that, It includes a water inlet, a spray box, a steady flow chamber, and a slit water outlet. The spray box is a horizontally arranged cylindrical structure with both ends closed. An inlet is connected to the cylindrical wall on the upper surface thereof, and the inlet communicates with the spray box. A number of through holes are arranged at equal intervals along the length direction of the cylindrical wall on the lower surface of the spray box for equalizing the flow of water entering the spray box. The steady flow chamber is a funnel-shaped chamber composed of a first arc plate and a second arc plate; the first arc plate and the second arc plate have the same structural dimensions, and the two are symmetrically connected to the bottom of the spray box to form a funnel-shaped flow path for steady flow. The slit outlet includes a first plate-like structure, a second plate-like structure, and a replacement plate; the first plate-like structure is a structure with an L-shaped cross-section composed of a first vertical plate and a first horizontal plate, and the L-shaped bending part has a rounded corner; the first vertical plate is vertically connected to the end of the first arc plate, and the connection point is the tangent point of the first arc plate; a long groove is arranged along the length direction on the upper surface of the first horizontal plate. The second plate-like structure is composed of a second vertical plate and an inclined plate. Among them, the second vertical plate is vertically arranged, and its upper end is connected to the end of the second arc plate, and the connection point is the tangent point of the second arc plate; the lower end of the second vertical plate is connected to the inclined plate, and the distance from the end of the inclined plate to the bending part of the first plate-like structure is 15 - 25 mm. The replacement plate is a plate-like structure with an L-shaped cross-section composed of a third vertical plate and a second horizontal plate. The third vertical plate is fitted and installed on the back of the inclined plate of the second plate-like structure. The lower surface of the second horizontal plate is parallel to the upper surface of the first horizontal plate, and a water outlet slit is formed between the lower surface of the second horizontal plate and the long groove on the first horizontal plate. The water flow continuously sprays along the width direction of the water outlet slit to achieve the effect of uniformly cooling the steel plate.

2. The quenching machine cooling device according to claim 1, characterized in that, The connection points of the two arc plates and the spray box are the tangent points between the arc plates and the circular cylindrical wall of the spray box, and the central angles formed by connecting the centers of the spray box with the two tangent points are 60° - 90°.

3. The quenching machine cooling device according to claim 1, characterized in that, The radii of the circles where the first arc plate and the second arc plate are located are both 110 mm.

4. A quenching machine cooling device according to claim 1, characterized in that, The included angle between the first vertical plate and the first horizontal plate is 100° - 115°, and the ratio of the plate lengths of the first vertical plate and the first horizontal plate is 2:1 - 4:1; the included angle between the second vertical plate and the inclined plate is 120° - 165°, and the ratio of the plate lengths of the second vertical plate and the inclined plate is 1.5:1 - 2:

1.

5. The quenching machine cooling device according to claim 1, characterized in that, The height of the water outlet slit is adjusted by adjusting the distance between the bottom of the replacement plate and the long groove on the first horizontal plate; the height of the water outlet slit is 1 - 3 mm.

6. The quenching machine cooling device according to claim 1, characterized in that, A limiting groove is arranged along the length direction on the back of the inclined plate of the second plate-like structure, and the replacement plate is installed in the limiting groove by bolts, and the height of the water outlet slit is adjusted by replacing the replacement plate.

7. A quenching machine cooling device according to claim 1, characterized in that, A groove is arranged at the position on the inclined plate where it fits with the replacement plate, and a sealing strip for sealing water is installed in the groove.

8. A quenching machine cooling device according to claim 1, characterized in that, The a number of through holes on the cylindrical wall of the lower surface of the spray box are circles with the same diameter.

9. A quenching machine cooling device according to claim 1, characterized in that, There are multiple water inlets, and the multiple water inlets are arranged at equal intervals.

10. The quenching machine cooling device according to claim 1, characterized in that, The cooling device further includes a connecting plate, and the connecting plate is arranged at both ends of the spray box for connecting the spray box to the frame of the quenching machine.

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