Quenching oil constant temperature system for heat treatment

Abstract

The utility model discloses a quenching oil constant-temperature system for heat treatment, and belongs to the technical field of heat treatment. Comprising a heat exchanger, an oil-water tank, a water tank, a controller and a temperature sensor arranged in the oil-water tank, wherein a circulating water path is formed between the heat exchanger and the water tank through a first pipeline assembly, a circulating oil path is formed between the heat exchanger and the oil-water tank through a second pipeline assembly, a water pump, a pressure sensor and a pneumatic valve are arranged on the first pipeline assembly, and an oil pump is arranged on the second pipeline assembly; the controller is electrically connected with the water pump, the pneumatic valve, the pressure sensor, the oil pump and the temperature sensor; according to the quenching oil constant-temperature system for heat treatment, energy loss can be reduced through accurate temperature control, meanwhile, the temperature of quenching oil is kept constant, and the quenching quality and the product stability are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat treatment, and particularly relates to a quenching oil constant temperature system for heat treatment. Background Technique

[0002] In the heat treatment process of metal materials, quenching is an important process, and the temperature control of quenching oil has a crucial impact on the quenching quality.

[0003] In the prior art, the quenching oil system often has high energy consumption and is difficult to maintain the constant temperature of the oil temperature, resulting in unstable quenching effect and affecting the product quality. Therefore, there is an urgent need for a quenching oil constant temperature system for heat treatment that is energy-saving and can effectively maintain the constant temperature of the oil temperature. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a quenching oil constant temperature system for heat treatment, which can reduce energy loss through precise temperature control, maintain the constant temperature of the quenching oil at the same time, and improve the quenching quality and product stability.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a quenching oil constant temperature system for heat treatment, including a heat exchanger, an oil water tank, a water tank, a controller, and a temperature sensor placed in the oil water tank;

[0006] Wherein, a circulating water path is formed between the heat exchanger and the water tank through a first pipeline assembly, a circulating oil path is formed between the heat exchanger and the oil water tank through a second pipeline assembly, a water pump, a pressure sensor, and a pneumatic valve are arranged on the first pipeline assembly, and an oil pump is arranged on the second pipeline assembly.

[0007] The controller is electrically connected to the water pump, the pneumatic valve, the pressure sensor, the oil pump, and the temperature sensor.

[0008] Optionally, the first pipeline assembly includes a first oil pipe connecting the heat medium inlet connected to the heat exchanger and the oil water tank, and a second oil pipe connecting the heat medium outlet connected to the heat exchanger and the oil water tank, and the oil pump is arranged on the first oil pipe.

[0009] Optionally, the second pipeline assembly includes a first water pipe connecting the cold medium inlet connected to the heat exchanger and the water tank, and a second water pipe connecting the cold medium outlet connected to the heat exchanger and the water tank, the water pump is arranged on the first water pipe, the pressure sensor is arranged on the first water pipe between the water pump and the heat exchanger, and the pneumatic valve is arranged on the second water pipe.

[0010] Optionally, the first oil pipe, the second oil pipe, the first water pipe, and the second water pipe are seamless steel pipes.

[0011] Optionally, filter valves are provided on the first water pipe between the water tank and the water pump and on the first oil pipe between the oil water tank and the oil pump.

[0012] Optionally, the first water pipe is connected to the bottom of the water tank.

[0013] Optionally, both the first oil pipe and the second oil pipe are connected to the bottom of the oil water tank.

[0014] Optionally, the second water pipe is connected to the top of the water tank, and a spray head is provided at one end of the second water pipe that accesses the water tank.

[0015] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: Based on the oil temperature feedback by the temperature sensor, when the oil temperature is too high, the opening and closing state of the pneumatic valve and the output power of the water pump and the oil pump can be adjusted according to the signal feedback by the temperature sensor, achieving the effect of quickly reducing the oil temperature. Through the quenching oil constant temperature system for heat treatment in this technical solution, not only can the oil temperature of the quenching oil be effectively maintained constant, but also the effect of energy conservation can be achieved by reasonably controlling the output power of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 is a schematic structural diagram of the quenching oil constant temperature system for heat treatment in a preferred embodiment of the present utility model;

[0018] Among them, 1. Heat exchanger; 2. Oil water tank; 3. Water tank; 4. Water pump; 5. Pressure sensor; 6. Pneumatic valve; 7. Oil pump; 8. First oil pipe; 9. Second oil pipe; 10. First water pipe; 11. Second water pipe; 12. Filter valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present utility model will now be further described in detail in conjunction with the drawings and embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0020] It should be noted that if there are directional indications (such as up, down, bottom, top, etc.) involved in this embodiment, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. Unless otherwise clearly specified and defined, the terms "set", "connected", and "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0021] As Figure 1 shown, a quenching oil constant temperature system for heat treatment includes a heat exchanger 1, an oil water tank 2, a water tank 3, a controller, and a temperature sensor placed in the oil water tank 2. Among them, a circulating water path is formed between the heat exchanger 1 and the water tank 3 through a first pipeline assembly, and a circulating oil path is formed between the heat exchanger 1 and the oil water tank 2 through a second pipeline assembly. A water pump 4, a pressure sensor 5, and a pneumatic valve 6 are arranged on the first pipeline assembly, and an oil pump 7 is arranged on the second pipeline assembly. The controller is electrically connected to the water pump 4, the pneumatic valve 6, the pressure sensor 5, the oil pump 7, and the temperature sensor.

[0022] Specifically, the controller is a prior art, which is composed of a variety of electronic components and can complete the reception and feedback of electrical signals. The quenching oil in the oil water tank 2 will be continuously heated by devices such as heaters in the prior art to ensure the use requirements of quenching. As Figure 1The shown water tank 3 and the oil water tank 2 are only schematic diagrams. The water tank 3 is a sealed box structure formed by welding or injection molding of metal plates, and the oil water tank 2 is an open box structure formed by welding or injection molding of metal plates. The water tank 3 stores a cooling liquid for reducing the oil temperature. The temperature sensor can monitor the temperature of the quenching oil in the oil tank in real time and feed back the numerical value of the oil temperature to the controller. When the oil temperature is higher than the set value, the controller can control the start / stop and output power of the water pump 4 and the oil pump 7, accelerate the rapid circulation of the quenching oil and the cooling liquid in the circulation oil circuit and the circulation water circuit respectively, and can perform heat exchange between the quenching oil and the cooling liquid through the heat exchanger 1, so that the oil temperature is quickly reduced to the set value. When the oil temperature is reduced to within the error range allowed by the set value, the controller can control the pneumatic valve 6 to open and close step by step at a certain frequency through the signal fed back by the temperature sensor. Since the pressure sensor 5 is placed on the first pipeline component between the pneumatic valve 6 and the water pump 4, the gradual closing of the pneumatic valve 6 will increase the pipe pressure in the first pipeline component. The pressure sensor 5 can convert the pressure signal into an electrical signal and feed back the electrical signal to the controller. The controller can synchronously reduce the output power of the water pump 4 through the fed-back signal, so that the temperature of the quenching oil can be maintained within a certain temperature range, improving the quenching quality and product stability. Through the quenching oil constant temperature system for heat treatment in this technical solution, not only can the oil temperature of the quenching oil be effectively kept constant, but also the energy-saving effect can be achieved by reasonably controlling the output power of the water pump 4.

[0023] As described above, the first pipeline component includes a first oil pipe 8 connecting the hot medium inlet connected to the heat exchanger 1 and the oil water tank 2, and a second oil pipe 9 connecting the hot medium outlet connected to the heat exchanger 1 and the oil water tank 2. The oil pump 7 is arranged on the first oil pipe 8.

[0024] As described above, the second pipeline component includes a first water pipe 10 connecting the cold medium inlet connected to the heat exchanger 1 and the water tank 3, and a second water pipe 11 connecting the cold medium outlet connected to the heat exchanger 1 and the water tank 3. The water pump 4 is arranged on the first water pipe 10, the pressure sensor 5 is arranged on the first water pipe 10 between the water pump 4 and the heat exchanger 1, and the pneumatic valve 6 is arranged on the second water pipe 11.

[0025] In this embodiment, the first oil pipe 8, the second oil pipe 9, the first water pipe 10, and the second water pipe 11 are seamless steel pipes, which are less affected by temperature changes and have a long service life.

[0026] Furthermore, filter valves 12 are arranged on the first water pipe 10 between the water tank 3 and the water pump 4 and on the first oil pipe 8 between the oil water tank 2 and the oil pump 7 to prevent impurities in the quenching oil and the cooling liquid from blocking the heat exchange channels in the heat exchanger 1.

[0027] As described above, the first water pipe 10 is connected to the bottom of the water tank 3; the second water pipe 11 is connected to the top of the water tank 3, and a spray head is provided at one end of the second water pipe 11 that accesses the water tank 3 to accelerate the natural cooling rate of the cooling liquid.

[0028] As described above, both the first oil pipe 8 and the second oil pipe 9 are connected to the bottom of the oil sump 2. The quenching oil after cooling enters the bottom of the oil sump 2 through the second oil pipe 9, which can accelerate the mixing of the quenching oil in the oil sump 2 and make the oil temperature of the quenching oil more balanced.

[0029] Working principle: The temperature sensor can monitor the temperature of the quenching oil in the oil sump in real time and feedback the value of the oil temperature to the controller. When the oil temperature is higher than the set value, the controller can control the water pump 4 and the oil pump 7 to start, accelerating the rapid circulation of the quenching oil and the cooling liquid in the circulation oil path and the circulation water path respectively, and can perform heat exchange between the quenching oil and the cooling liquid through the heat exchanger 1, so that the oil temperature is quickly reduced to the set value. When the oil temperature is reduced to within the error range allowed by the set value, the controller can control the pneumatic valve 6 to open and close step by step at a certain frequency through the signal fed back by the temperature sensor. Since the pressure sensor 5 is placed on the first pipeline assembly between the pneumatic valve 6 and the water pump 4, the gradual closing of the pneumatic valve 6 will increase the pipe pressure in the first pipeline assembly. The pressure sensor 5 can convert the pressure signal into an electrical signal and feedback the electrical signal to the controller. The controller can synchronously reduce the output power of the water pump 4 through the fed-back signal, so that the temperature of the quenching oil can be maintained within a certain temperature range, improving the quenching quality and product stability. Through the quenching oil constant temperature system for heat treatment in this technical solution, not only can the oil temperature of the quenching oil be effectively kept constant, but also the energy-saving effect can be achieved by reasonably controlling the output power of the water pump 4.

[0030] Based on the ideal embodiments of the present invention as inspiration, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A quenching oil constant temperature system for heat treatment, characterized in that: It comprises a heat exchanger (1), an oil-water tank (2), a water tank (3), a controller and a temperature sensor placed in the oil-water tank (2); A circulating water circuit is formed between the heat exchanger (1) and the water tank (3) via a first pipe assembly, and a circulating oil circuit is formed between the heat exchanger (1) and the oil-water tank (2) via a second pipe assembly; a water pump (4), a pressure sensor (5) and a pneumatic valve (6) are provided on the first pipe assembly, and an oil pump (7) is provided on the second pipe assembly; The controller is electrically connected to the water pump (4), the pneumatic valve (6), the pressure sensor (5), the oil pump (7), and the temperature sensor.

2. The quenching oil constant temperature system for heat treatment according to claim 1, characterized in that: The first pipeline assembly comprises a first oil pipe (8) connected between a heat medium inlet on the heat exchanger (1) and the oil-water tank (2), and a second oil pipe (9) connected between a heat medium outlet on the heat exchanger (1) and the oil-water tank (2). The oil pump (7) is arranged on the first oil pipe (8).

3. The quenching oil constant temperature system for heat treatment according to claim 2, characterized in that: The second pipe assembly comprises a first water pipe (10) connected between a cold medium inlet on the heat exchanger (1) and the water tank (3), and a second water pipe (11) connected between a cold medium outlet on the heat exchanger (1) and the water tank (3); the water pump (4) is arranged on the first water pipe (10); the pressure sensor (5) is arranged on the first water pipe (10) between the water pump (4) and the heat exchanger (1); and the pneumatic valve (6) is arranged on the second water pipe (11).

4. The quenching oil constant temperature system for heat treatment according to claim 3, characterized in that: The first oil pipe (8), the second oil pipe (9), the first water pipe (10), and the second water pipe (11) are seamless steel pipes.

5. The quenching oil constant temperature system for heat treatment according to claim 4, characterized in that: A filter valve (12) is provided on the first water pipe (10) between the water tank (3) and the water pump (4), and on the first oil pipe (8) between the oil-water tank (2) and the oil pump (7).

6. The quenching oil constant temperature system for heat treatment according to claim 3, characterized in that: The first water pipe (10) is connected to the bottom of the water tank (3).

7. The quenching oil constant temperature system for heat treatment according to claim 2, characterized in that: The first oil pipe (8) and the second oil pipe (9) are both connected to the bottom of the oil-water tank (2).

8. The quenching oil constant temperature system for heat treatment according to claim 3, characterized in that: The second water pipe (11) is connected to the top of the water tank (3), and a spray head is provided at one end of the second water pipe (11) connected to the water tank (3).

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