Heat recycling device of cooling system of induction heating equipment
By introducing a water-cooled air conditioning system and a plate heat exchanger into the cooling system of the induction heating equipment, the problems of overheating and poor cooling of the quenching liquid were solved, realizing heat recovery and utilization, energy saving and emission reduction, and improving the cooling efficiency of the equipment and the quality of the workpiece.
Patent Information
- Application Number
- CN202423175812.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Induction heating equipment generates a large amount of heat during operation, which can lead to overheating and damage to electrical components and poor cooling effect of quenching fluid, affecting the quality of workpieces. Furthermore, the heat from the cooling system is not effectively recovered and utilized, increasing production costs.
A water-cooled air conditioning system is added to the cooling system of the induction heating equipment. Through the combination of plate heat exchangers, thermocouples, and electric valves, the cooling water and quenching fluid are circulated and cooled, and the heat is recovered for workshop heating or hot water supply, and the temperature of the circulating water system is regulated.
It effectively recovers heat from induction heating equipment, reduces production costs, extends the service life of cooling towers, achieves energy conservation and emission reduction, ensures stable cooling temperature of cooling water and quenching fluid, and improves workpiece quality.
Smart Images
Figure CN223561617U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to induction heating equipment heat recovery technical field, concretely relates to a kind of heat recovery utilization device of induction heating equipment cooling system. BACKGROUND
[0002] Induction heating is one of the ways of heat treatment of metal materials, and has been widely used. Induction heating is a method of using electromagnetic induction to generate current in the interior of the material being heated, relying on the energy of these eddy currents to achieve the purpose of heating. The basic components of an induction heating system include an induction coil, an alternating current power supply and a workpiece. Depending on the heating object, the coil can be made into different shapes. The coil is connected to the power supply, which provides alternating current to the coil. The alternating current flowing through the coil generates an alternating magnetic field that passes through the workpiece. This magnetic field causes the workpiece to generate eddy currents, which heat up the workpiece.
[0003] During normal operation, the operating current of the induction heating power supply can be as high as several hundred amperes, several thousand amperes or even tens of thousands of amperes. The copper tube of the inductor acts as a conductor and will generate eddy currents under the action of the magnetic field. When the eddy currents flow inside the copper tube, they will generate a large amount of heat due to the presence of electrical resistance. At the same time, due to the work loss, devices such as thyristors and capacitors will generate a lot of heat. Due to the high power of the induction heating equipment, the overall heat generation is large. If there is no timely cooling or the cooling effect is poor, the temperature of the electrical components will rise sharply to the limit and burn out. The capacitors can also be short-circuited due to overheating.
[0004] In addition, when the workpiece is quenched after induction heating, the use temperature of the water-based quenching liquid is extremely sensitive to the cooling speed of the workpiece. Generally, when the temperature exceeds 40℃, the quenching effect is significantly deteriorated, which seriously reduces the hardenability and hardenability of the quenched workpiece. Especially in mass production, how to reduce the temperature rise of the quenching liquid is the key to ensuring the stability and consistency of the quality of the quenched workpiece. The quenching liquid needs to cool the workpiece from about 900-1000℃ to about 30℃. At this time, the temperature rise of the quenching liquid also needs to be cooled by the cooling system. Therefore, many parts of the induction heating equipment need to be cooled by cooling water. The temperature of the cooling water passing through the induction equipment rises, and the cooling water needs to be cooled by devices such as plate heat exchangers, cooling towers or refrigeration machines for recycling. If the heat is recycled and utilized, it can reduce production costs and reduce energy waste. SUMMARY
[0005] The utility model discloses in order to solve above-mentioned technical problem, provide a kind of heat recovery utilization device of induction heating equipment cooling system, by increasing water air conditioner on induction heating equipment external circulation cooling water loop, used as the heating or hot water use of workshop in winter, the temperature of circulating water is controlled by the thermocouple, electric valve etc.
[0006] The technical solution adopted by this utility model is: a heat recovery and utilization device for an induction heating equipment cooling system, including a circulating water tank, which is connected to a cooling tower via a cooling tower return water pipe. A circulating water pump is installed on the outlet pipe of the circulating water tank, and a circulating water supply main pipe is connected to the rear end of the circulating water pump. Circulating water supply branch pipes are opened on the circulating water supply main pipe, and each circulating water supply branch pipe is connected to an external cooling circulating water supply branch pipe of each induction heating equipment. The external cooling circulating water return branch pipes of the induction heating equipment are all connected to an air conditioning water supply main pipe. Air conditioning water supply branch pipes are opened on the air conditioning water supply main pipe, and each air conditioning water supply branch pipe is connected to a water-cooled air conditioner. The air conditioning return water branch pipes of the water-cooled air conditioners are all connected to the circulating return water main pipe. The end of the circulating return water main is connected to the cooling tower water supply pipe. Before connecting to the cooling tower water supply pipe, the circulating return water main has a branch pipe connected to the circulating water tank. Each induction heating device's internal cooling circulation system is equipped with a quenching liquid tank and a cooling water tank. The external cooling circulation system circulates and cools the quenching liquid and cooling water of the induction heating device through the first heat exchanger and the second heat exchanger, respectively. Electric valves are installed on the circulating return water main before entering the cooling tower and on the branch pipes entering the circulating water tank. A thermocouple one is installed on the circulating return water main before entering the circulating water tank. A thermocouple two is installed on the air conditioning water supply main before each water air conditioner. Electric valves are installed on the water supply and return water branch pipes of the water air conditioner for cooling system circulation control.
[0007] The outlet of the quenching liquid tank is connected to the inlet pipe of the heat medium of the first heat exchanger. The outlet of the heat medium of the first heat exchanger is equipped with a quenching liquid circulation pump. The outlet of the quenching liquid circulation pump is connected to the inlet pipe of the quenching liquid tank. The inlet and outlet of the cold medium of the first heat exchanger are respectively connected to the external cooling circulation system of the induction heating equipment for quenching liquid circulation cooling.
[0008] The cooling water tank outlet is equipped with a cooling water pump, which supplies cooling water to the induction heating equipment through a cooling water supply pipe. The cooling water return pipe of the induction heating equipment is connected to the heat medium inlet of the second heat exchanger. The heat medium outlet of the second heat exchanger is connected to the cooling water tank inlet pipe. The cold medium inlet and cold medium outlet of the second heat exchanger are respectively connected to the external cooling circulation system of the induction heating equipment.
[0009] Electric valves are installed on the refrigerant inlet pipes of both the first and second heat exchangers.
[0010] Both the first and second heat exchangers are plate heat exchangers.
[0011] The circulating backwater main pipe is provided with a thermocouple one before the circulating water tank, the thermocouple one is used for detecting the circulating backwater temperature, the water air conditioner front end water inlet pipeline is provided with a thermocouple two, the thermocouple two is used for detecting the water air conditioner water supply temperature, the thermocouple one and the thermocouple two are electrically connected with the controller, and the output end of the controller is electrically connected with the electric valve.
[0012] The cooling tower is a closed cooling tower.
[0013] The internal cooling circulation system is provided with a first heat exchanger and a second heat exchanger, and the cooling water and the quenching liquid of the induction heating equipment are cooled by the external cooling circulation system through the heat exchanger.
[0014] The circulating backwater main pipe is provided with a thermocouple one before the circulating water tank, the thermocouple one is used for detecting the circulating backwater temperature, the water air conditioner front end water inlet pipeline is provided with a thermocouple two, the thermocouple two is used for detecting the water air conditioner water supply temperature, the thermocouple one and the thermocouple two are electrically connected with the controller, and the output end of the controller is electrically connected with the electric valve.
[0015] The heat recycling device has the advantages that the structural design is scientific and reasonable, the external cooling circulation system circulates and cools the cooling water and the quenching liquid of the induction heating equipment through the plate heat exchanger, the cooling temperature of the cooling water and the quenching liquid of the induction heating equipment is ensured, the water air conditioner heating system is increased, the circulating water system is regulated and controlled through the thermocouple and the electric valve arranged on the pipeline, the water air conditioner water supply temperature is controllable, the operation time of the cooling tower is reduced, the service life of the cooling tower is prolonged, the heat of the induction heating equipment cooling system is recycled, energy is fully utilized, and energy saving and emission reduction are realized. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a structural schematic view of the heat recycling system.
[0017] Marked in the figure: 1, cooling tower; 2, circulating water tank; 3, circulating water pump; 4, induction heating equipment; 5, water air conditioner; 6, first heat exchanger; 7, second heat exchanger; 8, quenching liquid tank; 9, quenching liquid circulating pump; 10, cooling water tank; 11, equipment cooling water pump; 12, electric valve; 13, thermocouple one; 14, thermocouple two; 15, circulating water supply main pipe; 16, circulating backwater main pipe; 17, air conditioner water supply main pipe. DETAILED DESCRIPTION
[0018] The specific embodiments of the utility model are further described in detail below in combination with the drawings.
[0019] As Figure 1 shown, a heat recycling device of induction heating equipment cooling system, including circulating water tank 2, circulating water tank 2 with cooling tower 1 is connected through cooling tower backwater pipe, circulating water tank 2 outlet pipeline is equipped with circulating water pump 3, circulating water pump 3 rear end is connected with circulating water supply main pipe 15, and circulating water supply branch pipe is opened on circulating water supply main pipe 15, and circulating water supply branch pipe is connected with the external cooling circulating water branch pipe of each induction heating equipment 4 respectively, and the external cooling circulating water branch pipe of induction heating equipment 4 is connected with air conditioner water supply main pipe 17, and air conditioner water supply branch pipe is opened on air conditioner water supply main pipe 17, and air conditioner water supply branch pipe is connected with each water air conditioner 5 respectively, and the air conditioner backwater branch pipe of water air conditioner 5 is connected with circulating backwater main pipe 16, and the end of circulating backwater main pipe 16 is connected with the water supply pipe of cooling tower 1, and the branch pipe of circulating backwater main pipe 16 is connected with circulating water tank 2 before being connected with the water supply pipe of cooling tower 1;The internal cooling circulating system of each induction heating equipment 5 is equipped with quenching liquid tank 8 and cooling water tank 10 respectively, and the quenching liquid and cooling water of induction heating equipment 4 are cooled by first heat exchanger and second heat exchanger respectively in external cooling circulating system;Electric valve 12 is arranged on circulating backwater main pipe 16 before entering cooling tower 1 and the branch pipe of circulating water tank 2, and thermocouple one 13 is arranged on circulating backwater main pipe 16 before entering circulating water tank 2, and thermocouple two 14 is arranged on air conditioner water supply main pipe 17 before each water air conditioner 5, and electric valve 12 is arranged on the water supply and backwater branch pipe of water air conditioner 5, for cooling system circulation control.
[0020] The outlet of quenching liquid tank 8 is connected with the heat medium inlet pipeline of first heat exchanger 6, the heat medium outlet of first heat exchanger 6 is provided with quenching liquid circulating pump 9, the outlet of quenching liquid circulating pump 9 is connected with the inlet pipeline of quenching liquid tank 8, and the coolant inlet and outlet of first heat exchanger 6 are connected with the external cooling circulating system of induction heating equipment 4 respectively, for quenching liquid circulating cooling.
[0021] The outlet of the cooling water tank 10 is provided with a device cooling water pump 11, which supplies cooling water to the induction heating device 4 through a cooling water supply pipe, and the cooling water return pipe of the induction heating device 4 is connected in communication with the heat medium inlet of the second heat exchanger 7; the heat medium outlet of the second heat exchanger 7 is connected in communication with the cooling water tank 10 inlet pipe, and the heat medium inlet and the heat medium outlet of the second heat exchanger 7 are connected in communication with the external cooling circulation system of the induction heating device 4, respectively.
[0022] The heat medium inlet pipes of the first heat exchanger 6 and the second heat exchanger 7 are each provided with an electric valve 12, and the first heat exchanger 6 and the second heat exchanger 7 are both plate heat exchangers. The cooling tower 1 is a closed cooling tower.
[0023] The circulation return water main pipe 16 is provided with a thermocouple 13 before the circulation water tank 2, which is used for detecting the circulation return water temperature, and the front end water inlet pipe of the water air conditioner 5 is provided with a thermocouple 14, which is used for detecting the water supply temperature of the water air conditioner 5, and the thermocouple 13 and the thermocouple 14 are electrically connected with a controller, and the output end of the controller is electrically connected with the electric valve 12.
[0024] The working process of the heat recycling device of the induction heating device cooling system is as follows: the external cooling circulation system of the induction heating device 4 for heat exchange is modified, an air conditioner water supply main pipe 17 is added, a plurality of water air conditioners 5 are arranged in parallel on the air conditioner water supply main pipe 17 for winter heating or hot water in each workshop, and the return water of the water air conditioner 5 is connected to the circulation return water main pipe 16. The quenching liquid and the cooling water of the induction heating device 4 are heat exchanged through the first heat exchanger 6, the second heat exchanger 7 and the external cooling circulation system of the device, respectively, the cooling circulating water of the external cooling circulation system of the device with heat enters the air conditioner water supply main pipe 17, and the heat is transmitted to the internal heating or hot water use of the workshop through the water air conditioner 5; the thermocouple 14 for monitoring water temperature is arranged at the front end of the water air conditioner 5 on the air conditioner water supply main pipe 17, the opening and closing of the electric valve 12 are controlled through the real-time temperature detected by the thermocouple 14, when the return water temperature is higher than the control target temperature, the inlet electric valve 12 of the water air conditioner 5 is opened, and the heat is transmitted to the internal heating of the workshop through the water air conditioner 5, when the water temperature is relatively low and the water temperature cannot meet the requirements of the device after flowing through a plurality of water air conditioners 5, the inlet electric valve 12 of the rear-end water air conditioner 5 is closed. The circulation water tank 2 and the cooling tower 1 are arranged at the end of the circulation return water main pipe 16, when the return water temperature meets the requirements, the return water is directly returned to the circulation water tank 2, if the water temperature is high, the return water enters the closed cooling tower 1 for further cooling, and then is returned to the circulation water tank 2 for use by the external cooling circulation system of the induction heating device 4.
[0025] The external cooling circulating system of the induction heating equipment 4 circulates and cools the cooling water and quenching liquid of the induction heating equipment 4 through the plate heat exchanger respectively, ensures the cooling temperature of the cooling water and quenching liquid of the induction heating equipment 4, and increases the water air conditioner 5 heat supply system, adjusts and controls the circulating water system through the set thermocouple and electric valve 12, ensures the controllability of the water air conditioner water supply temperature, reduces the operation time of the cooling tower 1, prolongs the service life of the cooling tower 1, realizes the recycling of the heat of the induction heating equipment 4 cooling system, fully utilizes the energy, and realizes energy saving and emission reduction. If the heating power of a single induction heating equipment 4 is 600KW, the energy conversion efficiency is 90%, according to the law of conservation of energy, 540KW of energy needs to be cooled by the cooling water, and when the equipment is continuously operated at full load, the heat of the cooling water can be estimated to heat a factory building with a height of 12m and a building area of about 4500 square meters. In the case that the outdoor temperature is 0℃ in winter, the internal temperature of the workshop can be maintained at 15-20℃. For a factory with multiple induction heating equipment 4, heat recovery can greatly reduce production costs and achieve energy saving and emission reduction.
[0026] In addition to the above embodiments, the utility model can also have other implementation manners, and any technical scheme formed by equivalent replacement or equivalent transformation falls within the protection scope required by the utility model.
Claims
1. A heat recovery and utilization device for a cooling system of an induction heating equipment, characterized in that: The system includes a circulating water tank, which is connected to the cooling tower via a cooling tower return water pipe. A circulating water pump is installed on the outlet pipe of the circulating water tank. A main circulating water supply pipe is connected to the rear end of the circulating water pump. Branch circulating water supply pipes are branched onto the main circulating water supply pipe, each connected to an external cooling circulating water supply branch pipe for each induction heating unit. The external cooling circulating return water branch pipes of the induction heating units are all connected to the main air conditioning supply pipe. Air conditioning supply branch pipes are branched onto the main air conditioning supply pipe, each connected to a water-cooled air conditioner. The air conditioning return water branch pipes of the water-cooled air conditioners are all connected to the main circulating return water pipe. The end of the main circulating return water pipe is connected to the cooling tower supply water pipe. Before connecting to the cooling tower water supply pipe, the main circulating water pipe has a branch pipe connected to the circulating water tank. Each induction heating device's internal cooling circulation system is equipped with a quenching liquid tank and a cooling water tank. The external cooling circulation system circulates and cools the quenching liquid and cooling water of the induction heating device through the first heat exchanger and the second heat exchanger, respectively. Electric valves are installed on the main circulating water pipe before entering the cooling tower and on the branch pipes entering the circulating water tank. A thermocouple is installed on the main circulating water pipe before entering the circulating water tank. A thermocouple is installed on the main air conditioning water supply pipe before each water air conditioner. Electric valves are installed on the water supply and return water branch pipes of the water air conditioner for cooling system circulation control.
2. The heat recovery and utilization device for the cooling system of an induction heating equipment according to claim 1, characterized in that: The outlet of the quenching liquid tank is connected to the inlet pipe of the heat medium of the first heat exchanger. The outlet of the heat medium of the first heat exchanger is equipped with a quenching liquid circulation pump. The outlet of the quenching liquid circulation pump is connected to the inlet pipe of the quenching liquid tank. The inlet and outlet of the cold medium of the first heat exchanger are respectively connected to the external cooling circulation system of the induction heating equipment for quenching liquid circulation cooling.
3. The heat recovery and utilization device for the cooling system of an induction heating equipment according to claim 1, characterized in that: The cooling water tank outlet is equipped with a cooling water pump, which supplies cooling water to the induction heating equipment through a cooling water supply pipe. The cooling water return pipe of the induction heating equipment is connected to the heat medium inlet of the second heat exchanger. The heat medium outlet of the second heat exchanger is connected to the cooling water tank inlet pipe. The refrigerant inlet and refrigerant outlet of the second heat exchanger are respectively connected to the external cooling circulation system of the induction heating equipment.
4. The heat recovery and utilization device for the cooling system of an induction heating equipment according to claim 1, characterized in that: Both the first and second heat exchangers are plate heat exchangers, and electric valves are installed on the refrigerant inlet pipes of both heat exchangers.
5. The heat recovery and utilization device for the cooling system of an induction heating equipment according to claim 1, characterized in that: A thermocouple is installed on the main circulating water pipe before the circulating water tank. Thermocouple 1 is used to detect the temperature of the circulating water. A thermocouple 2 is installed on the inlet pipe of the water air conditioner. Thermocouple 2 is used to detect the supply water temperature of the water air conditioner. Both thermocouple 1 and thermocouple 2 are electrically connected to the controller. The output of the controller is electrically connected to the electric valve.
6. The heat recovery and utilization device for the cooling system of an induction heating equipment according to claim 1, characterized in that: The cooling tower is a closed-loop cooling tower.