A cooling device for a quenching machine

Abstract

The present invention provides a quenching machine cooling device, which belongs to the technical field of steel cooling equipment. The device includes a water inlet, a spray box, a flow stabilization chamber, and a slit water outlet connected in sequence; wherein, a plurality of through holes are provided at the bottom of the spray box, the flow stabilization chamber is a funnel-shaped chamber, and the slit outlet is formed by connecting a first plate-like structure, a second plate-like structure, and a replacement plate. A water outlet slit is formed between the bottom of the replacement plate and the upper surface of the first plate-like structure. Water flows from the water supply system into the spray box of the cooling device, and after the water flows through the spray box and then passes through the funnel-shaped flow stabilization chamber to further stabilize the flow rate, the water is sprayed out through the narrow and long slit water outlet so that the water is in the shape of an ultra-thin blade and finally sprayed onto the surface of the steel plate. The water can be sprayed onto the steel plate more evenly, cooling the steel plate, greatly improving the cooling uniformity and stability, reducing the bending and deformation of the steel plate, and improving the quality of the steel plate.

Description

Technical Field

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

[0002] During the quenching process, the steel plate adopts a quenching machine cooling device to achieve synchronous uniform cooling. The cooling uniformity of the steel plate directly affects the structural properties and plate quality of the steel plate. As an important component of the quenching machine cooling device, the slit nozzle is characterized in that the water flow it sprays is in the shape of a slit, which can finely control the distribution of cooling water so that the cooling medium can be continuously distributed along the width of the slit without jet breakpoints, achieving a uniform and high-intensity cooling effect. Therefore, its design directly affects the quenching effect and the performance of the metal material; however, the traditional quenching machine slit nozzle has obvious deficiencies in cooling uniformity and stability, and cannot meet the requirements of high-precision quenching process. Therefore, the present invention designs a quenching machine cooling device, which realizes uniform cooling of the steel plate by structurally designing and optimizing the parameters of the steady flow section and the slit nozzle. Summary of the Invention

[0003] In response to the above-mentioned problems existing in the prior art, the present invention provides a quenching machine cooling device, which can achieve uniform and controllable cooling of the steel plate, reduce the internal stress of the steel plate, reduce the curvature 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 comprises a water inlet, a spray box, a flow stabilization cavity and a slit water outlet;

[0006] The spray box is a horizontally arranged cylindrical structure with closed ends, and a water inlet is connected to the wall of the upper surface of the cylinder via a mounting flange, and the water inlet is in communication with the spray box;

[0007] A plurality of through holes arranged at equal intervals are provided on the wall of the lower surface of the spray box along the length direction of the spray box, which are used to evenly distribute the water entering the spray box, play a damping role, and avoid water hammer caused by concentrated water flow;

[0008] The flow stabilization 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 are symmetrically connected to the bottom of the spray box to form a funnel-shaped flow channel for stabilizing the 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 center of the spray box and the line connecting the two tangent points is 60° to 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 an L-shaped structure composed of a first vertical plate and a first horizontal plate, and the L-shaped bend is rounded; 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; the upper surface of the first horizontal plate is provided with a long groove along the length direction; the angle between the first vertical plate and the first horizontal plate is 100° to 115°, and the length ratio of the first vertical plate to the first horizontal plate is 2:1 to 4:1;

[0010] The second plate-like structure is composed of a second vertical plate and an inclined plate, wherein the second vertical plate is arranged vertically, 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 between the end of the inclined plate and the bend of the first plate-like structure is 15 to 25 mm; the angle between the second vertical plate and the inclined plate is 120° to 165°; the length ratio of the second vertical plate to the inclined plate is 1.5:1 to 2:1;

[0011] The replacement plate is a plate structure with an L-shaped cross-section composed of a third vertical plate and a second horizontal plate. The third vertical plate is fitted on the back of the inclined plate of the second plate 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 continuously along the width direction of the water outlet gap to achieve the effect of uniform cooling of the steel plate.

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

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

[0014] Furthermore, a groove is provided on the inclined plate at a position where the inclined plate is in contact with the replacement plate, and a sealing strip for sealing water is installed in the groove.

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

[0016] Furthermore, a limiting groove is provided on the back side of the inclined plate of the second plate-like structure along the length direction, 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] Furthermore, the cooling device also includes connecting plates, which are arranged at both ends of the spray box and are used to connect the spray box to the frame of the quenching machine.

[0018] Compared with the existing technology, 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. The water flows evenly through the spray box and then further stabilizes the flow rate through the funnel-shaped flow channel, which can reduce turbulence, ensure that the water flows smoothly and evenly through 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 not only enables the water to be sprayed out stably and evenly in the flow channel, but also ensures that the sprayed water flow is continuous, and finally passes through the narrow water outlet gap so that the sprayed water is in the shape of an ultra-thin blade, which greatly improves the cooling uniformity and stability of the steel plate; and the present invention has a simple structure, is easy 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 Schematic diagram of the structure of the cooling device of the quenching machine in an embodiment of the present invention.

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

[0023] Figure 5 for Figure 4 A partial enlarged view of part Ⅰ.

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

[0025] Figure 7 2 is a flow field distribution diagram of an embodiment of the present invention.

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

[0027] Figure 9 2 is a flow field velocity distribution diagram of an embodiment of the present invention.

[0028] In the figure: 1 water inlet, 2 spray box, 3 flow stabilizing chamber, 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

[0029] To facilitate understanding of the technical solution, the present invention provides the following embodiments.

[0030] like Figure 1 As shown, this embodiment provides a quenching machine cooling device, which mainly includes a water inlet 1, a connecting plate 4, a spray box 2, a flow stabilization chamber 3 and a gap water outlet, and the entire material is made of 304 stainless steel.

[0031] Among them, the spray box 2 is a horizontally arranged cylindrical structure with closed ends, a diameter of 159 mm, a wall thickness of 4.5 mm, and a length of 1800 mm; a water inlet 1 is connected to the cylinder wall on its upper surface through a mounting flange, and the water inlet 1 is connected to the spray box 2; according to the design requirements, two water inlets are designed, and the distance between the two water inlets is 700 mm.

[0032] like Figure 2 and Figure 3 As shown, a number of through holes 5 with the same diameter and arranged at equal intervals are provided on the 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 water inlet 1, and the water flow is evenly distributed through the through holes 5 on the spray box, which plays a damping role and avoids the water hammer phenomenon caused by the concentration of water flow.

[0033] like Figure 4 As shown, the flow stabilization chamber 3 is a funnel-shaped chamber composed of a first circular arc plate 6 and a second circular arc plate 8. The first circular arc plate 6 and the second circular arc plate 8 are both made of heat-resistant steel plates and have the same structural dimensions. The radius of the circle where the two arcs are located is 110 mm, and the wall thickness of the two circular 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 point between the two circular arc plates and the spray box is the tangent point between the circular arc plate and the circular cylinder wall of the spray box, and the center angle formed by the center of the spray box and the line connecting the two tangent points is 60°.

[0034] like Figure 4 and Figure 5 As shown, the slit water outlet includes a first plate structure 7, a second plate 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 consisting of a first vertical plate 13 and a first horizontal plate 14, with rounded corners at the L-shaped bend; 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 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, wherein 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 end of the inclined plate 16 is 15 mm away from the bending point of the first plate-like structure 7; a limiting groove is provided on the back of the inclined plate 16 along the length direction; the angle between the second vertical plate 15 and the inclined plate 16 is 145°; the length ratio of the second vertical plate 15 to the inclined plate 16 is 1.5:1.

[0037] The replacement plate 10 is an L-shaped plate structure consisting of a third vertical plate 17 and a second horizontal plate 18. The third vertical plate 17 is fixed to the retaining groove on the back of the inclined plate of the second plate structure 9 by bolts 11. A 1mm high water outlet gap is formed between the lower surface of the second horizontal plate 18 and the long groove of the first horizontal plate 14. Water is continuously sprayed along the width of the water outlet gap, forming a 20° angle with the horizontal plane of the steel plate, achieving a uniform cooling effect on the steel plate. The replacement plate 10 can be disassembled, cleaned and replaced to prevent clogging.

[0038] like Figure 6 As shown in the figure, it is the flow field distribution diagram of the traditional method. The traditional pipeline layout is to connect the branch pipelines of each branch under the main pipeline to perform a diversion design, which easily causes the water flow in the middle area to be dense and cause water hammer phenomenon, and the edge parts on both sides are also prone to cause insufficient water supply; Figure 7 As shown, the structure designed by the present invention significantly improves this phenomenon.

[0039] like Figure 8 As shown in Figure 2, the traditional method of spray box response is slow, the water flow fluctuation is large, and the average flow rate deviation is ±4.8%; Figure 9 As shown, in this embodiment, the spray box responds quickly, the water flow fluctuation is small, and the deviation of the average flow rate 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to 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 water inlet, spray box, flow stabilization cavity and gap water outlet; The spray box is a horizontally arranged cylindrical structure with closed ends, and a water inlet is connected to the cylinder wall on its upper surface, and the water inlet is connected to the spray box; A plurality of through holes arranged at equal intervals along the length of the spray box are provided on the wall of the lower surface of the spray box to evenly distribute the water entering the spray box; The flow stabilization 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 structure and size, and are symmetrically connected to the bottom of the spray box to form a funnel-shaped flow channel for stabilizing the 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 an L-shaped structure composed of a first vertical plate and a first horizontal plate, and the L-shaped bend is rounded; 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; the upper surface of the first horizontal plate is provided with a long groove along the length direction; The second plate-like structure is composed of a second vertical plate and an inclined plate, wherein the second vertical plate is arranged vertically, 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 between the end of the inclined plate and the bend of the first plate-like structure is 15 to 25 mm; The replacement plate is a plate structure with an L-shaped cross-section composed of a third vertical plate and a second horizontal plate. The third vertical plate is fitted on the back of the inclined plate of the second plate 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 continuously along the width direction of the water outlet gap to achieve the effect of uniform cooling of the steel plate.

2. A 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 cylinder wall of the spray box, and the central angles formed by the center of the spray box and the lines connecting the two tangent points are 60° to 90°.

3. A 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 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; the angle between the second vertical plate and the inclined plate is 120°~165°, and the length ratio of the second vertical plate to the inclined plate is 1.5:1~2:

1.

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

6. A quenching machine cooling device according to claim 1, characterized in that: A limiting groove is provided on the back side of the inclined plate of the second plate-like structure along the length direction. 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.

7. A quenching machine cooling device according to claim 1, characterized in that: A groove is provided on the inclined plate at a position where the inclined plate is in contact 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 plurality of through holes on the wall of the lower surface of the spray box are circular 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. A quenching machine cooling device according to claim 1, characterized in that: The cooling device further comprises connecting plates, which are arranged at both ends of the spray box and are used to connect the spray box to a frame of the quenching machine.

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