Apparatus for solution heat treatment of precipitation hardening stainless steel

Abstract

The utility model provides a kind of precipitation hardening stainless steel solid solution heat treatment device, belong to stainless steel heat treatment equipment technical field, including the sealing door of the placement cabinet front surface setting, the storage rack is set in placement cabinet middle part, the air-blowing device is set in one side of placement cabinet, the heat preservation assembly is set in another side of placement cabinet, storage rack is between air-blowing device and heat preservation assembly, the drainage assembly is connected with the bottom of placement cabinet and is set, the top of storage rack is provided with spray device, the utility model places workpiece on storage rack, and the hot air that workpiece surface emits is blown into heat preservation assembly and is collected by air-blowing device, further cooling is given workpiece surface by spray device, and hot fee liquid after spraying enters drainage tank, and then hot fee liquid is pumped to heat preservation water tank by water pump and is stored, to collect the waste heat of workpiece after solid solution heat treatment, to improve the cooling speed of stainless steel workpiece after heat treatment, and the purpose of collecting workpiece waste heat, avoid resource waste.

Description

Technical Field

[0001] This utility model relates to the technical field of stainless steel heat treatment equipment, specifically to a precipitation-hardening stainless steel solution heat treatment device. Background Technology

[0002] Precipitation hardening stainless steel refers to a type of high-strength stainless steel in which different types and quantities of strengthening elements are added to the basic chemical composition of stainless steel. Through a precipitation hardening process, different types and quantities of carbides, nitrides, carbonitrides, and intermetallic compounds are precipitated, thus improving the steel's strength while maintaining sufficient toughness. It is also known as PH steel. Based on its microstructure, precipitation hardening stainless steel can be classified into three types: martensitic, semi-austenitic, and austenitic.

[0003] In related technologies, in order to improve the strength and corrosion resistance of stainless steel workpieces, solution heat treatment is performed after the stainless steel workpieces are manufactured. For example, after the round stainless steel pipes are manufactured, solution heat treatment is required. The workpieces are heated to about 950°~1150° and kept at a constant temperature for a period of time to allow carbon elements and other alloys to fully dissolve in the austenite.

[0004] However, existing stainless steel solution heat treatment furnaces lack a device for treating residual heat of the workpiece after use, resulting in natural cooling of the furnace, loss and waste of residual heat, reduced energy efficiency, and waste of resources. To solve the above problems, a precipitation hardening stainless steel solution heat treatment device is proposed. Utility Model Content

[0005] In view of this, the present invention provides a solution heat treatment device for precipitation hardening stainless steel. The present invention places the workpiece on a shelf, blows the hot air emanating from the surface of the workpiece into the heat preservation component for collection by a blower, and then further cools the surface of the workpiece by a spraying device. The hot waste liquid after spraying enters the drain tank through the drain hopper, and is then pumped into the heat preservation water tank for storage by a water pump. In this way, the residual heat of the workpiece after solution heat treatment is collected, thereby improving the cooling rate of the stainless steel workpiece after heat treatment and achieving the purpose of collecting the residual heat of the workpiece, thus avoiding resource waste.

[0006] To solve the above-mentioned technical problems, this utility model provides a precipitation hardening stainless steel solution heat treatment device, including a sealed door on the front of the placement box, a shelf in the middle of the placement box, a blowing device on one side of the placement box, a heat insulation component on the other side of the placement box, the shelf located between the blowing device and the heat insulation component, a drainage component connected to the bottom of the placement box, and a spray device on the top of the shelf.

[0007] The shelf includes a shelf for placing stainless steel workpieces. Each of the four corners of the shelf has a support leg for supporting the shelf, thus connecting the shelf to the storage box and providing support for the stainless steel workpieces. The support legs are connected to the bottom plate inside the storage box. The shelf is made of high-temperature resistant material.

[0008] The spraying device includes a spraying unit fixed on the top wall of the placement box, a spraying pipeline installed on the top wall of the placement box, a spraying pipeline for flowing clean water to spray the stainless steel workpiece, a spraying pipeline connected to the spraying unit, and a number of spraying heads installed on the spraying pipeline for spraying spraying liquid, with the water outlet of the spraying head facing the upper surface of the placement plate.

[0009] The air blowing device includes a fan installed on the outer wall of the placement box. The fan is used to blow out cold air and blow the hot air emitted from the surface of the stainless steel workpiece on the placement plate into the air duct. The air outlet of the fan extends into the interior of the placement box. An air outlet pipe is fixedly installed at the air outlet of the fan. The air outlet pipe is used to blow the cold air outside the placement box onto the surface of the shelf. The air outlet of the air outlet pipe faces the shelf.

[0010] The insulation component includes a ventilation duct embedded in the side wall of the placement box. The ventilation duct is used to connect the air diffuser to the insulation tank. One end of the ventilation duct faces the inside of the placement box and is connected to the air diffuser, which is used to increase the air volume of hot air entering the ventilation duct. The other end of the ventilation duct is connected to the outside of the placement box and is connected to the insulation tank, which is used to store hot air and steam.

[0011] The insulation tank and the ventilation pipe are connected by a reducing pipe fitting, which is used to connect pipes of different diameters. The reducing pipe fitting is equipped with a first valve, which is used to control the opening and closing of the reducing pipe fitting and the ventilation pipe. An exhaust pipe is connected to the bottom of the insulation tank, which is used to recover and reuse the hot air in the insulation tank.

[0012] The drainage assembly includes a drainage hopper connected to the bottom of the housing, which guides the spray wastewater from the bottom of the housing into a drainage tank. The outlet of the drainage hopper is connected to the drainage tank, which stores the wastewater (high-temperature wastewater) that has passed through stainless steel pipes. A drainage pipe is connected to the rear end of the drainage tank, which guides the wastewater in the drainage tank into an insulated water tank. A second valve is installed on the drainage pipe, and a water pump is installed at the rear end of the second valve. The water pump pumps the wastewater in the drainage pipe into the insulated water tank. A filter is installed between the water pump and the second valve to block impurities in the wastewater. The outlet of the water pump is connected to the insulated water tank, which keeps the extracted wastewater warm for subsequent heat exchange.

[0013] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects: 1. By placing the workpiece on a shelf, a blower is used to blow the hot air emanating from the workpiece surface into the insulation component for collection. Then, a spraying device is used to further cool the workpiece surface. The hot waste liquid after spraying enters the drainage tank through a drainage hopper, and then a water pump is used to pump the hot waste liquid into the insulation water tank for storage. This process collects the residual heat of the workpiece after solution heat treatment, thereby improving the cooling rate of the stainless steel workpiece after heat treatment and achieving the purpose of collecting residual heat, thus avoiding resource waste.

[0014] 2. The ventilation duct is used to connect the air expansion duct to the heat preservation tank. The air expansion duct is used to increase the air volume of hot air entering the ventilation duct. The heat preservation tank is used to store hot air and steam.

[0015] 3. The drain hopper is used to guide the spray wastewater placed at the bottom of the tank to the drain tank. The drain tank is used to store the wastewater that has passed through the stainless steel pipes. The wastewater in the drain tank is then guided to the insulated water tank through the drain pipe. A water pump is used to pump the wastewater from the drain pipe into the insulated water tank. A filter is used to block impurities in the wastewater to prevent them from entering the insulated water tank. Finally, the insulated water tank keeps the extracted wastewater warm for subsequent heat exchange. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a rear sectional view of the present invention; Figure 3 This is a front view structural diagram of the present utility model; Figure 4 This is a side sectional view of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 100, placement box; 101, sealing door; 102, shelf; 103, placement plate; 104, support leg; 200, air blowing device; 201, fan; 202, air outlet duct; 300, insulation component; 301, ventilation duct; 302, air diffuser; 303, insulation tank; 304, reducing pipe fitting; 305, first valve; 306, exhaust pipe; 400, drainage component; 401, drainage hopper; 402, drainage tank; 403, drainage pipe; 404, second valve; 405, water pump; 406, filter; 407, insulated water tank; 500, spraying device; 501, spraying pipeline; 502, spray head; 503, spraying unit. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-4The technical solutions of the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0019] like Figure 1-4 As shown: This embodiment provides a solution heat treatment apparatus for precipitation hardening stainless steel, including a sealed door 101 on the front of a placement box 100, a shelf 102 in the middle of the placement box 100 for placing workpieces that have undergone solution heat treatment, a blowing device 200 on one side of the placement box 100 for use in heat treatment, a heat insulation component 300 on the other side of the placement box 100, the shelf 102 being located between the blowing device 200 and the heat insulation component 300, a drainage component 400 connected to the bottom of the placement box 100, and a spray device 500 on the top of the shelf 102.

[0020] In use, the sealed door 101 is opened and the workpiece after solution heat treatment is placed on the shelf 102. The sealed door 101 is then closed, and the hot air emanating from the surface of the workpiece is blown into the heat preservation tank 303 inside the heat preservation component 300 by the fan 201 and the air outlet 202 for collection. Then, the spray device 500 is started so that the spray head 502 further cools the surface of the workpiece. The waste liquid after spraying enters the drain tank 402 through the drain hopper 401, and is then pumped into the heat preservation water tank 407 for storage by the water pump 405. This process collects the residual heat of the workpiece after solution heat treatment, thereby improving the cooling rate of the stainless steel workpiece after heat treatment and achieving the purpose of collecting the residual heat of the workpiece, thus avoiding resource waste.

[0021] This embodiment provides a solution heat treatment apparatus for precipitation-hardening stainless steel. like Figure 1 , 2 As shown in Figure 4: The shelf 102 includes a placement plate 103 for placing stainless steel workpieces. A support leg 104 is provided at each of the four corners of the bottom of the placement plate 103. The support leg 104 is fixedly connected to the placement plate 103 and is used to support the placement plate 103, thereby connecting the placement plate 103 to the placement box 100. The support leg 104 is fixedly connected to the bottom plate inside the placement box 100, so that the shelf 102 is supported for supporting the stainless steel workpieces. The placement plate 103 is made of high temperature resistant material.

[0022] Its effect is as follows: the support leg 104 is used to support the placement plate 103, thereby connecting the placement plate 103 with the placement box 100, so that the shelf 102 is supported to support the stainless steel workpiece.

[0023] like Figure 2 , 3 As shown in Figure 4: The spraying device 500 includes a spraying unit 503 fixed on the outer top wall of the placement box 100. The spraying unit 503 includes components such as a spraying water tank, a booster pump, a frequency converter, and valves. A spraying pipe 501 is installed on the inner top wall of the placement box 100. The spraying pipe 501 is connected to the spraying unit 503 through a sealed pipe. The spraying pipe 501 is used to circulate clean water for spraying stainless steel workpieces. The spraying pipe 501 is connected to the spraying unit 503. Several spray heads 502 are installed on the spraying pipe 501. The spray heads 502 can be welded to the spraying pipe or connected by a threaded seal. The spray heads 502 are used to spray spraying liquid. The water outlet of the spray head 502 faces the upper surface of the placement plate 103.

[0024] Its effect is as follows: the spray pipe 501 is used to flow clean water to spray the stainless steel workpiece, the spray head 502 is used to spray the spray liquid, and the water outlet end of the spray head 502 faces the upper surface of the placement plate 103.

[0025] like Figure 2 , 3 As shown in Figure 4: The blowing device 200 includes a fan 201 installed on the outer wall of the placement box 100. The fan 201 is fixed to the outer wall of the placement box 100 by bolts through a tripod. The fan 201 is used to blow out cold air and blow the hot air emitted from the surface of the stainless steel workpiece on the placement plate 103 into the air expansion hopper 302. The air outlet end of the fan 201 extends into the interior of the placement box 100. The fan 201 is sealed and connected to the air outlet pipe 202. The air outlet end of the fan 201 is fixedly provided with the air outlet pipe 202. A support plate is provided on one end of the air outlet pipe 202 located inside the placement box 100. The air outlet pipe 202 is used to blow the cold air outside the placement box 100 onto the surface of the shelf 102. The air outlet of the air outlet pipe 202 faces the air expansion hopper 302, and the air outlet end of the air outlet pipe 202 faces the shelf 102.

[0026] Its effects are as follows: the fan 201 is used to blow out cold air, the fan 201 is used to blow the hot air emitted from the surface of the stainless steel workpiece on the placement plate 103 into the air duct 302, and the air outlet duct 202 is used to blow the cold air outside the placement box 100 to the surface of the shelf 102, thereby dissipating heat from the surface of the workpiece and concentrating the heat into the heat preservation tank 303.

[0027] like Figure 1 , 2As shown in Figure 3, the insulation component includes a ventilation pipe 301 embedded in the side wall of the placement box 100. A support plate is provided on one end of the ventilation pipe 301 that extends into the placement box 100. The ventilation pipe 301 is used to connect the air expansion hopper 302 to the insulation tank 303. One end of the ventilation pipe 301 faces the interior of the placement box 100 and is connected to the air expansion hopper 302. The ventilation pipe 301 and the air expansion hopper 302 are welded together. The air expansion hopper 302 is shaped like a frustum and is used to increase the air volume of the hot air entering the ventilation pipe 301. The other end of the ventilation pipe 301 is connected to the outside of the placement box 100 and is connected to the insulation tank 303. The insulation tank 303 and the ventilation pipe 301 are welded together through a reducing pipe fitting 304. The insulation tank 303 is used to store hot air and steam.

[0028] Its effects are as follows: the ventilation pipe 301 is used to connect the air expansion duct 302 to the heat preservation tank 303, the air expansion duct 302 is used to increase the air volume of hot air entering the ventilation pipe 301, and the heat preservation tank 303 is used to store hot air and steam.

[0029] like Figure 1 , 2 As shown in Figures 3 and 4: The heat preservation tank 303 and the ventilation pipe 301 are connected by a reducing fitting 304. The reducing fitting 304 is used to connect pipes of different diameters. A first valve 305 is provided on the reducing fitting 304. The first valve 305 is sealed and installed on the straight pipe of the reducing fitting 304. The first valve 305 is used to control the opening and closing of the reducing fitting 304 and the ventilation pipe 301. An exhaust pipe 306 is connected to the bottom of the heat preservation tank 303. The exhaust pipe 306 is welded to the heat preservation tank 303. The exhaust pipe 306 is used to recover and reuse the hot air in the heat preservation tank 303.

[0030] Its effects are as follows: the first valve 305 is used to control the opening and closing of the reducing pipe 304 and the ventilation pipe 301, and the exhaust pipe 306 is used to recover and reuse the hot air in the heat preservation tank 303.

[0031] like Figure 2 , 3As shown in Figure 4: The drainage assembly 400 includes a drainage hopper 401 connected to the bottom of the placement box 100. The drainage hopper 401 is frustoconical in shape and is welded to the bottom of the placement box 100. The drainage hopper 401 is used to guide the spray wastewater at the bottom of the placement box 100 into the drainage tank 402. The outlet end of the drainage hopper 401 is connected to the drainage tank 402, which is welded to the bottom of the placement box 100 and encloses the drainage hopper 401. The drainage tank 402 is used to store the wastewater that has passed through the stainless steel pipe fittings. This wastewater is high-temperature wastewater. The rear end of the drainage tank 402 is connected to a drainage pipe 403, which is sealed to the drainage tank 402. The drainage pipe 403 is used to drain the wastewater from the drainage tank 402. Wastewater is diverted to an insulated water tank 407. A second valve 404 is installed on the drain pipe 403, and a water pump 405 is installed at the rear end of the second valve 404. The water pump 405 is sealed and connected to the drain pipe 403. The water pump 405 is used to pump the wastewater in the drain pipe 403 into the insulated water tank 407. A filter 406 is installed between the water pump 405 and the second valve 404. The filter 406 can be a flange-connected filter cylinder. The filter 406 is used to block impurities in the wastewater. The drain end of the water pump 405 is connected to the insulated water tank 407. The insulated water tank 407 is sealed and connected to the drain pipe 403. The insulated water tank 407 is used to keep the extracted wastewater warm, which facilitates subsequent heat exchange and utilization.

[0032] Its functions are as follows: the drain hopper 401 is used to guide the spray wastewater at the bottom of the box 100 to the drain tank 402, the drain tank 402 is used to store the wastewater that has passed through the stainless steel pipe fittings. This wastewater is high-temperature wastewater. The drain pipe 403 is used to guide the wastewater in the drain tank 402 to the insulated water tank 407. The water pump 405 is used to pump the wastewater in the drain pipe 403 into the insulated water tank 407. The filter 406 is used to block impurities in the wastewater. The insulated water tank 407 is used to keep the extracted wastewater warm, so as to facilitate subsequent heat exchange and utilization.

[0033] Working principle: Open the sealed door 101 and place the workpiece after solution heat treatment on the shelf 102. Close the sealed door 101 and blow the hot air emanating from the surface of the workpiece into the heat preservation tank 303 inside the heat preservation component 300 for collection through the fan 201 and the air outlet 202. Then, start the spray device 500 so that the spray head 502 can further cool the surface of the workpiece. The waste liquid after spraying enters the drain tank 402 through the drain hopper 401. Then, the waste liquid is pumped into the heat preservation water tank 407 for storage by the water pump 405. In this way, the residual heat of the workpiece after solution heat treatment is collected, thereby improving the cooling rate of the stainless steel workpiece after heat treatment and achieving the purpose of collecting the residual heat of the workpiece, thus avoiding resource waste.

[0034] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A precipitation-hardening stainless steel solution heat treatment apparatus, comprising a sealed door (101) disposed on the front of a housing (100), characterized in that: A shelf (102) is provided in the middle of the placement box (100). A blower (200) is provided on one side of the placement box (100), and a heat preservation component (300) is provided on the other side of the placement box (100). The shelf (102) is located between the blower (200) and the heat preservation component (300). A drainage component (400) is connected to the bottom of the placement box (100), and a spray device (500) is provided on the top of the shelf (102).

2. The precipitation-hardening stainless steel solution heat treatment apparatus as described in claim 1, characterized in that: The shelf (102) includes a placement board (103), and a support leg (104) is provided at each of the four corners of the bottom of the placement board (103). The support leg (104) is connected to the bottom plate inside the placement box (100). The placement board (103) is made of high temperature resistant material.

3. The precipitation-hardening stainless steel solution heat treatment apparatus as described in claim 2, characterized in that: The spraying device (500) includes a spraying unit (503) fixed on the top wall of the placement box (100), a spraying pipe (501) provided on the top wall of the placement box (100), the spraying pipe (501) being connected to the spraying unit (503), and a plurality of spraying heads (502) provided on the spraying pipe (501), with the water outlet of the spraying head (502) facing the upper surface of the placement plate (103).

4. The precipitation-hardening stainless steel solution heat treatment apparatus as described in claim 3, characterized in that: The blower (200) includes a fan (201) installed on the outer wall of the placement box (100). The air outlet of the fan (201) extends into the interior of the placement box (100). An air outlet pipe (202) is fixedly installed on the air outlet of the fan (201), and the air outlet of the air outlet pipe (202) faces the shelf (102).

5. The precipitation-hardening stainless steel solution heat treatment apparatus as described in claim 4, characterized in that: The insulation component (300) includes a ventilation pipe (301) embedded in the side wall of the placement box (100). One end of the ventilation pipe (301) is connected to an air duct (302) inside the placement box (100), and the other end of the ventilation pipe (301) is connected to an insulation tank (303) outside the placement box (100).

6. The precipitation-hardening stainless steel solution heat treatment apparatus as described in claim 5, characterized in that: The heat preservation tank (303) is connected to the ventilation pipe (301) through a reducing pipe fitting (304). A first valve (305) is provided on the reducing pipe fitting (304), and an exhaust pipe (306) is provided at the bottom of the heat preservation tank (303).

7. The precipitation-hardening stainless steel solution heat treatment apparatus as described in claim 6, characterized in that: The drainage assembly (400) includes a drainage hopper (401) connected to the bottom of the housing (100), a drainage tank (402) connected to the outlet end of the drainage hopper (401), a drainage pipe (403) connected to the rear end of the drainage tank (402), a second valve (404) provided on the drainage pipe (403), a water pump (405) provided at the rear end of the second valve (404), a filter (406) provided between the water pump (405) and the second valve (404), and an insulated water tank (407) connected to the drainage end of the water pump (405).

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