A quenching device for steelmaking

Abstract

This utility model relates to the field of quenching technology, and in particular to a quenching device for steelmaking. A plate heat exchanger is provided on one side of the quenching pool; a liquid suction assembly is provided inside the quenching pool; a heat medium circulation assembly is provided at the heat medium port of the plate heat exchanger, the heat medium circulation assembly including a heat medium inlet pipe fixedly connected to the outer wall of the quenching pool, one end of which is connected to one end of the liquid suction assembly; a heat medium circulation pump; the heat medium inlet and outlet of the plate heat exchanger are circulated with the water in the quenching pool through the heat medium circulation assembly and the liquid suction assembly, and the cold medium inlet and outlet of the plate heat exchanger are connected to an external water source through the cold medium circulation assembly. During quenching, the heat generated during quenching is exchanged through the plate heat exchanger, allowing the water in the quenching pool to cool down rapidly. Simultaneously, the exchanged heat can be recovered and reused, enabling the device to not only quickly reduce the quenching water temperature but also recover heat and save energy.

Description

Technical Field

[0001] This utility model relates to the field of quenching-related technology, and in particular to a quenching device for steelmaking. Background Technology

[0002] Quenching of steel is a heat treatment process in which steel is heated to its critical temperature and held for a period of time to achieve complete or partial austenitization, followed by rapid cooling at a rate greater than the critical cooling rate to induce martensitic transformation. The solution treatment or heat treatment processes involving rapid cooling of materials such as aluminum alloys, copper alloys, titanium alloys, and tempered glass are also commonly referred to as quenching. Commonly used quenching media include brine, water, mineral oil, and air. Quenching can improve the hardness and wear resistance of metal workpieces, and is therefore widely used in various tools, molds, measuring instruments, and parts requiring wear-resistant surfaces.

[0003] For example, Chinese utility model patent CN216404460U proposes a quenching device for steelmaking in a steel plant, including a pool body. A material placement frame is provided above the pool body, and the height of the placement frame is adjusted by a winding assembly installed on a fixed frame connected to one side of the pool body. A water circulation assembly is provided on one side of the pool body. A chip discharge box extending outward and connected to the inner cavity of the pool body is connected to the front end face of the pool body, and multiple chip discharge pipes with valves are connected to the lower end face of the chip discharge box. An inclined filter frame is detachably connected to the inner wall of the pool body, and the material discharge end of the filter frame is correspondingly connected to the lower port of the opening end of the chip discharge box.

[0004] Existing technologies have identified the problem that high-temperature steel parts continuously release heat during the quenching process, causing the quenching liquid temperature to rise rapidly and requiring the continuous addition of cooling water. Existing technologies use refrigeration to cool the parts, but this method cannot quickly exchange heat or recover and reuse it, resulting in energy waste. Utility Model Content

[0005] The purpose of this invention is to provide a quenching device for steelmaking to solve the problems mentioned in the background art.

[0006] The technical solution adopted in this utility model is:

[0007] A quenching device for steelmaking includes a quenching tank, a hoisting assembly provided on the outside of the quenching tank, the hoisting assembly including a hoisting frame; a winch installed on the top of the hoisting frame; a cable disposed at the bottom end of the winch; and a placement frame fixedly connected to the bottom end of the cable.

[0008] A plate heat exchanger is provided on one side of the quenching tank.

[0009] The quenching tank is equipped with a liquid suction component inside;

[0010] The plate heat exchanger is equipped with a heat medium circulation assembly at its heat medium port. The heat medium circulation assembly includes a heat medium inlet pipe, which is fixedly connected to the outer wall of the quenching tank, with one end connected to one end of the liquid suction assembly; a heat medium circulation pump, which is located at the heat medium inlet of the plate heat exchanger, with its inlet end connected to one end of the heat medium inlet pipe; and a heat medium outlet pipe, which is located at the heat medium outlet of the plate heat exchanger.

[0011] The plate heat exchanger is equipped with a refrigerant circulation assembly at its refrigerant port. The refrigerant circulation assembly includes a refrigerant circulation pump located at the refrigerant inlet of the plate heat exchanger; a refrigerant inlet pipe located at the liquid inlet of the refrigerant circulation pump, one end of which is connected to an external cold water source; and a refrigerant outlet pipe fixedly connected to the refrigerant outlet of the plate heat exchanger, one end of which is connected to an external water storage tank.

[0012] Optionally, the liquid suction assembly includes a liquid suction pipe, which is fixedly connected to the inner wall of the quenching tank; and a liquid suction mesh cover, which is disposed at the liquid suction port of the liquid suction pipe.

[0013] Optionally, there are two suction tubes, and one end of each suction tube is connected to one end of the heat medium inlet tube.

[0014] Optionally, the outer wall of the suction tube is provided with at least five equidistant suction ports, and each suction port is provided with a suction mesh cover.

[0015] Optionally, the heat medium inlet pipe is a three-way pipe, with its two ports connected to one end of each of the two suction pipes.

[0016] Optionally, the heat medium circulation assembly further includes a filter tube disposed at the connection between the heat medium inlet pipe and the heat medium circulation pump.

[0017] Optionally, the filter tube consists of a tube body and a filter screen.

[0018] Optionally, the outer wall of the refrigerant outlet pipe is provided with insulation cotton.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] By setting up a plate heat exchanger, the heat medium inlet and outlet of the plate heat exchanger are circulated with the water in the quenching tank through the heat medium circulation component and the liquid suction component. The cold medium inlet and outlet of the plate heat exchanger are connected with the external water source through the cold medium circulation component. During quenching, the heat generated during quenching is exchanged through the plate heat exchanger, so that the water in the quenching tank can be cooled down quickly. At the same time, the exchanged heat can be recovered and reused. This device can not only quickly reduce the quenching water temperature, but also has the advantages of recovering heat and saving energy. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this application;

[0023] Figure 2 This is a cross-sectional view of the quenching tank in this application;

[0024] Figure 3 This is a schematic diagram of the structure of the heat medium circulation component in this application.

[0025] Figure 4 This is a schematic diagram of the refrigerant circulation component in this application.

[0026] Figure label:

[0027] 10. Quenching tank;

[0028] 20. Lifting assembly; 21. Lifting frame; 22. Winch; 23. Cable; 24. Placement frame;

[0029] 30. Plate heat exchanger;

[0030] 40. Liquid suction assembly; 41. Liquid suction tube; 42. Liquid suction mesh cover;

[0031] 50. Heat medium circulation assembly; 51. Heat medium inlet pipe; 52. Heat medium circulation pump; 53. Heat medium outlet pipe; 54. Filter pipe;

[0032] 60. Refrigerant circulation assembly; 61. Refrigerant circulation pump; 62. Refrigerant inlet pipe; 63. Refrigerant outlet pipe. Detailed Implementation

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Given that current technologies that rely on refrigeration for cooling cannot quickly exchange heat or recover and reuse it, energy is wasted.

[0035] like Figure 1-4 As shown, this utility model embodiment provides a quenching device for steelmaking, including a quenching pool 10, a hoisting assembly 20 on the outside of the quenching pool 10, the hoisting assembly 20 including a hoisting frame 21; a winch 22 installed on the top of the hoisting frame 21; a cable 23 set at the bottom of the winch 22; and a placement frame 24 fixedly connected to the bottom of the cable 23.

[0036] The quenching pool 10 stores water for quenching steel. During quenching, the winch 22 is started, and the winch 22 drives the bottom placement frame 24 to move up and down through the cable 23, so that the steel placed in the placement frame 24 can enter and exit the water surface for quenching.

[0037] A plate heat exchanger 30 is provided on one side of the quenching tank 10.

[0038] The plate heat exchanger 30 uses the SWEP E series, which can perform efficient heat exchange, and will not be described in detail here.

[0039] The quenching tank 10 is equipped with a liquid suction assembly 40, which includes a liquid suction pipe 41, which is fixedly connected to the inner wall of the quenching tank 10; and a liquid suction mesh cover 42, which is set at the liquid inlet of the liquid suction pipe 41.

[0040] The suction pipe 41 is placed horizontally at the bottom of the quenching tank 10. Multiple suction ports are provided on the suction pipe 41 so that the water in the quenching tank 10 can enter the suction pipe 41 evenly, thereby improving the uniformity of suction and avoiding the water temperature difference at different locations (the water temperature is high near the quenching point and low far from the quenching point) caused by opening the suction port in only one place, which affects the heat exchange efficiency. Furthermore, by setting a suction screen 42 on each suction port, the suction screen 42 can block and filter the oxide scale generated in the water due to high temperature quenching, preventing particles from clogging the circulation network.

[0041] The heat medium port of the plate heat exchanger 30 is provided with a heat medium circulation assembly 50. The heat medium circulation assembly 50 includes a heat medium inlet pipe 51, which is fixedly connected to the outer wall of the quenching tank 10, and one end is connected to one end of the liquid suction assembly 40; a heat medium circulation pump 52, which is set at the heat medium inlet of the plate heat exchanger 30, and the inlet end is connected to one end of the heat medium inlet pipe 51; and a heat medium outlet pipe 53, which is set at the heat medium outlet of the plate heat exchanger 30.

[0042] One end of the heat medium inlet pipe 51 is connected to the suction pipe 41. During heat exchange, the water (hot water) in the quenching pool 10 is brought into the heat medium inlet pipe 51 through the suction pipe 41 by starting the heat medium circulation pump 52. Then, the hot water is pumped into the plate heat exchanger 30 by the heat medium circulation pump 52. Heat exchange takes place inside the plate heat exchanger 30. The cooled water is discharged into the quenching pool 10 through the heat medium outlet pipe 53 to achieve rapid cooling of the water and heat exchange operation.

[0043] The plate heat exchanger 30 has a refrigerant circulation assembly 60 at its refrigerant port. The refrigerant circulation assembly 60 includes a refrigerant circulation pump 61, which is located at the refrigerant inlet of the plate heat exchanger 30; a refrigerant inlet pipe 62, which is located at the liquid inlet of the refrigerant circulation pump 61 and is connected at one end to an external cold water source; and a refrigerant outlet pipe 63, which is fixedly connected to the refrigerant outlet of the plate heat exchanger 30 and is connected at one end to an external water storage tank.

[0044] The refrigerant circulation pump 61 is connected to an external water source (tap water in the plant area), and the refrigerant outlet pipe 63 is connected to a water storage tank with heat preservation effect. During heat exchange, the refrigerant circulation pump 61 is started to pump the refrigerant into the plate heat exchanger 30 for heat exchange. The water that has absorbed heat is discharged into the water storage tank through the refrigerant outlet pipe 63 for heat utilization.

[0045] Furthermore, there are two suction pipes 41, one end of each suction pipe 41 is connected to one end of the heat medium inlet pipe 51, and the outer wall of the suction pipe 41 is provided with at least five equidistant suction ports, and each suction port is provided with a suction mesh cover 42.

[0046] By setting two suction tubes 41 and opening at least five equidistant suction ports on each suction tube 41, the suction efficiency can be improved while further enhancing the uniformity of the suction water temperature.

[0047] Furthermore, the heat medium inlet pipe 51 has a Y-shaped structure with three ports, and the two ports on the same side are respectively connected to one end of the two suction pipes 41.

[0048] The three ports of the heat medium inlet pipe 51 are respectively connected to one end of the two suction pipes 41 and the inlet of the heat medium circulation pump 52.

[0049] Furthermore, the heat medium circulation assembly 50 also includes a filter pipe 54, which is disposed at the connection between the heat medium inlet pipe 51 and the heat medium circulation pump 52. The filter pipe 54 consists of a pipe body and a filter screen.

[0050] By setting up a filter tube 54, which contains a 100-mesh filter screen (0.15 mm aperture, intercepting particles >0.1 mm), smaller impurities can be effectively prevented from entering the plate heat exchanger 30.

[0051] Furthermore, the outer wall of the refrigerant outlet pipe 63 is provided with insulation cotton (not shown in the figure).

[0052] The insulation effect of refrigerant outlet pipe 63 is improved by adding insulation cotton.

[0053] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A quenching device for steelmaking, comprising: A quenching tank, wherein a hoisting assembly is provided on the outside of the quenching tank, the hoisting assembly comprising: Lifting frame; A winch is installed on top of the hoisting frame; The cable is located at the bottom end of the winch; A placement frame is fixedly connected to the bottom end of the cable; Its characteristic is that a plate heat exchanger is provided on one side of the quenching tank; The quenching tank is equipped with a liquid suction component inside; The plate heat exchanger is equipped with a heat medium circulation assembly at its heat medium port, the heat medium circulation assembly comprising: A heat transfer medium inlet pipe is fixedly connected to the outer wall of the quenching tank, with one end connected to one end of the liquid absorption assembly; A heat medium circulation pump is installed at the heat medium inlet end of the plate heat exchanger, and the liquid inlet end is connected to one end of the heat medium inlet pipe. A heat medium outlet pipe is provided at the heat medium outlet end of the plate heat exchanger; The plate heat exchanger is equipped with a refrigerant circulation assembly at its refrigerant port, the refrigerant circulation assembly comprising: A refrigerant circulation pump is installed at the refrigerant inlet of the plate heat exchanger; The refrigerant inlet pipe is located at the inlet end of the refrigerant circulation pump, with one end connected to an external cold water source; The refrigerant outlet pipe is fixedly connected to the refrigerant outlet end of the plate heat exchanger, with one end connected to an external water storage tank.

2. The quenching device for steelmaking according to claim 1, characterized by The liquid aspiration assembly includes: A suction pipe is fixedly connected to the inner wall of the quenching tank; A liquid-absorbing mesh is provided at the liquid-absorbing port of the liquid-absorbing tube.

3. The quenching device for steelmaking according to claim 2, characterized by There are two suction tubes, and one end of each suction tube is connected to one end of the heat medium inlet tube.

4. The quenching device for steelmaking according to claim 2, characterized by The outer wall of the suction tube is provided with at least five equidistant suction ports, and each suction port is provided with a suction mesh cover.

5. The quenching device for steelmaking according to claim 2, characterized by The heat medium inlet pipe is a three-way pipe, with its two ports connected to one end of each of the two inlet pipes.

6. The quenching device for steelmaking according to claim 1, characterized by The heat medium circulation assembly also includes: A filter tube is installed at the connection between the heat medium inlet pipe and the heat medium circulation pump.

7. The quenching device for steelmaking according to claim 6, characterized by The filter tube consists of a tube body and a filter screen.

8. The quenching device for steelmaking according to claim 1, characterized by The outer wall of the refrigerant outlet pipe is lined with insulating cotton.

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