Vacuum annealing furnace for three-dimensional roll iron core

Abstract

The invention relates to the field of three-dimensional roll iron core heat treatment link equipment in the field of iron core manufacturing, in particular to a vacuum annealing furnace for a three-dimensional roll iron core. The problems that in the prior art, in the annealing process of the three-dimensional roll iron core, a furnace body is short in service life, and finished product quality control is poor are solved. The device comprises a rectangular shell-shaped annealing furnace, heating pipelines are mounted on the inner wall of the annealing furnace, guide plates are arranged among the heating pipelines to form guide air ducts, a high-temperature area and a low-temperature area are arranged on the side wall of the annealing furnace, the heating pipelines are distributed in the high-temperature area, and a trolley plate of a trolley for bearing the three-dimensional roll iron core is matched with the annealing furnace in width. A trolley is arranged on the trolley plate, a low-temperature area without a heating pipeline is formed on the lower portion of the trolley plate, wheels are arranged at the bottom of the trolley, track rails matched with the wheels are correspondingly arranged on the bottom face in the annealing furnace, and sliding grooves are formed between the high-temperature area and the low-temperature area. The shape, position and size of the sliding groove correspond to the width of a trolley plate of the trolley so that the trolley plate can move in the sliding groove, and the upper space and the lower space can be separated. The device has the advantages that deformation of the track is effectively prevented through the design of the temperature partitions, balance of heating temperature is guaranteed and over-high temperature is avoided through the design of the flow guide heating pipelines and the flow guide air ducts, and the service life of the device is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of three-dimensional wound core manufacturing, in particular to a vacuum annealing furnace for three-dimensional wound core. BACKGROUND

[0002] In the field of three-dimensional wound core, the annealing equipment in the heat treatment link is mostly a double-sleeve structure space formed by a metal furnace body and high-temperature stainless steel wrapping insulation material. The heating element is suspended on the inner wall of the stainless steel wrapping insulation material space through a stainless steel screw porcelain sleeve. Through this use, the annealing purpose of the three-dimensional wound core is achieved. However, in the prior art, the heat preservation performance of the furnace shell and the inner insulation sleeve is too weak, resulting in that the furnace shell relies on the outer water cooling circulation system for heat dissipation, which has the following disadvantages: 1. The water cooling circulation system of the furnace shell is too much, which often causes water leakage, frequent maintenance, production interruption and product batch scrap. 2. The temperature in the furnace is not uniform, the product performance index is too large, and the qualification rate of the same batch is not high. 3. During the heating process of the furnace, the circulating water cooling system of the furnace shell takes away a large amount of valuable heat, resulting in low thermal efficiency of the furnace and high energy consumption. 4. The stainless steel porcelain sleeve for suspending the heating element is easily damaged during use. After the damage, the heating element and the fixing screw are short-circuited, and the furnace shell is connected, which causes safety hazards. Due to the large number of hidden porcelain sleeves and screws for suspending the heating element, the maintenance difficulty is greatly increased. 5. The transmission mechanism of the charging car is pushed into the furnace by external force and dragged out of the furnace. The track is arranged at the bottom of the material frame, and the sliding roller is arranged at the bottom of the furnace. The two cooperate to slide in and out. Since the sliding mechanism is entirely arranged in the high-temperature space, the track, the material frame and the wheel shaft are deformed at high temperature, making the feeding and discharging process crooked and wobbly, and the feeding and discharging process is prone to tilting risk. It not only causes safety risk to the personal safety of the equipment operator, but also causes damage to the equipment itself and the risk of product scrap. 6. The side opening door greatly increases the actual occupied space of a single device. SUMMARY

[0003] The purpose of the present application is to solve the problems of low service life of the furnace body and poor product control in the annealing process of the three-dimensional wound core in the prior art. Through the present application, the water leakage risk caused by the water circulation system of the furnace shell is solved from the root cause by canceling the water circulation system of the furnace shell. The temperature in the furnace is not uniform, the product performance index is too large, and the qualification rate of the same batch is not high.

[0004] The specific scheme of the present application is: The application discloses a vacuum annealing furnace for three-dimensional volume iron core, which comprises a rectangular shell-shaped annealing furnace, an inner wall of the shell is directly provided with a light-weight refractory fiber insulation layer made of aluminum silicate ceramic fiber, a heating pipe is arranged on the inner wall of the annealing furnace, a guide plate is arranged between each row of the heating pipes to form a guide air duct, a high-temperature zone and a low-temperature zone are arranged on the side wall of the annealing furnace, the heating pipes are distributed in the high-temperature zone, the plate of a trolley for loading the three-dimensional volume iron core is matched with the width of the annealing furnace, the lower part of the plate forms the low-temperature zone without the heating pipes, the bottom of the trolley is provided with wheels, the bottom surface of the annealing furnace is provided with wheel track matched with the wheels, and a sliding groove is arranged between the high-temperature zone and the low-temperature zone, the sliding groove is matched with the width of the plate of the trolley to realize the movement of the plate in the sliding groove and the separation of the upper and lower spaces.

[0005] The heating pipes are fixedly arranged between the inner wall and the refractory fiber insulation layer through ceramic nails, the ceramic nails suspend the heating pipes on the refractory fiber insulation layer, and each heating pipe is independently and parallelly arranged in the form of a branch between the heating pipe and the heating source.

[0006] The thickness of the refractory fiber insulation layer is between 5cm and 15cm.

[0007] The wheels and the plate of the trolley are connected in a half-wrapping mode, that is, the plate is provided with a through hole for providing a wheel mounting space, a square shell-shaped wheel cover is arranged above the through hole, the wheel cover is made of metal, and the wheels are arranged in the wheel cover with a volume of half to 2 / 3.

[0008] A vertical electric lifting system is arranged between the furnace door and the furnace body.

[0009] The ceramic nails suspend and fix the guide plates on the refractory fiber insulation layer.

[0010] The bottom plate and the three-dimensional volume iron core are further provided with a transition pressure bearing plate, the upper part of the transition pressure bearing plate is provided with a positioning tool for different types of three-dimensional volume iron cores, and the lower part is provided with a leaf spring between the bottom plate and the transition pressure bearing plate, and the bottom plate, the transition pressure bearing plate and the leaf spring jointly form the plate of the trolley.

[0011] The bottom plate is provided with a blind hole matched with the wheel cover.

[0012] In the specific implementation, a columnar air duct is arranged in a detachable mode in the center of the bottom plate, the bottom surface of the air duct is provided with a branch air inlet path adhered to the bottom plate, the branch air inlet path comprises a cold air inlet path, a hot air inlet path and a valve door, the cold air inlet path is communicated with the low-temperature zone, the hot air inlet path is communicated with the high-temperature zone, the bottom part of the columnar air duct is provided with an electric heating mechanism for forming a chimney effect, the circuit switch of the electric heating mechanism is communicated to the outside of the annealing furnace through the bottom of the trolley to form hot air inlet, and the air pipe in the valve door and the wheel cover is provided with an electrically-controlled air blowing mechanism to form cold air inlet.

[0013] A cold air outlet is provided at the joint between the wheel cover and the branch air intake duct. The valve includes a push rod that blocks the cold air outlet. Correspondingly, a side door is provided on the branch air intake duct so that the push rod can enter and exit. A hinge is provided between the side door and the branch air intake duct.

[0014] The beneficial effects of this invention are as follows: The low temperature difference inside the furnace facilitates slow heating or cooling, effectively preventing equipment deformation. It also enables precise and coordinated control of the three key elements: temperature, time, and atmosphere.

[0015] The equipment is easy to maintain and service. Metal wheel covers facilitate the transfer of heat radiation and also allow for control over the speed of heat radiation transfer. During the rolling of the bottom rollers, heat radiation is transferred evenly and slowly, ensuring a certain amount of heat radiation is transferred. This transfer causes the bottom track to heat up appropriately without deformation. Further appropriate heating technology can extend the service life of the wheel platform. On the other hand, the protruding wheel covers provide a certain degree of restraint to the annealing furnace, preventing it from shaking and tipping over during transportation. The introduction of leaf springs reduces vibration in the equipment and protects the processed three-dimensional coiled iron core to a certain extent; the parallel connection of various heating pipes facilitates precise regional temperature control. The later-designed columnar air duct facilitates heating and heat dissipation in the middle of the three-dimensional coiled iron core, resulting in good temperature control. Attached Figure Description

[0016] Figure 1 This is a front view of the structure of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 This is a right view of the structure of the present invention; Figure 4 This is a perspective view of the structure of the present invention; Figure 5 This is a schematic diagram of the structure between the base plate and the transition bearing plate in this invention; Figure 6 This is a perspective view of another structure of the present invention; Figure 7 yes Figure 6 The front view of the structure shown; Figure 8 yes Figure 6 Top view of the structure shown; Figure 9 yes Figure 6 Left view of the structure shown; Figure 10 yes Figure 6 Right view of the structure shown; Figure 11is another perspective view of another structure of the present application from another angle; Figure 12 is a schematic view of the structure at the interface; Names of components in the figure: 1. annealing furnace body; 2. refractory fiber insulation layer; 3. heating pipe; 4. flow guide plate; 5. bottom plate; 6. wheel track; 7. wheel cover; 8. transition pressure bearing plate; 9. leaf spring; 10. columnar air duct; 11. branch air inlet duct; 12. electric heating mechanism; 13. push rod; 14. side door; 15. fan of air blowing mechanism; 16. furnace door; 17. air inlet and outlet of branch air inlet duct. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. Example 1

[0018] A kind of vacuum annealing furnace for three-dimensional volume iron core, see Figures 1 to 6 , design includes annealing furnace of rectangular shell, the inner wall of shell is directly installed with the refractory fiber insulation layer 2 made of light refractory fiber of aluminum silicate ceramic, the inner wall of the annealing furnace is installed with heating pipe 3, flow guide plate 4 is arranged between each row of heating pipe 3 to form flow guide air duct, the side wall of the annealing furnace is provided with high temperature zone and low temperature zone, heating pipe 3 is distributed in high temperature zone, the bottom plate of the push car that carries three-dimensional volume iron core is matched with the width of the annealing furnace, so that the lower part of the bottom plate forms a low temperature zone without heating pipe 3, the bottom of the push car is provided with wheels, and the bottom surface in the annealing furnace is provided with wheel track 6 matched with the wheels, and a sliding groove is arranged between the high temperature zone and the low temperature zone, the shape and size of the sliding groove correspond to the width of the bottom plate of the push car to realize the movement of the bottom plate in the sliding groove and separate the upper and lower spaces.

[0019] The heating pipe 3 is fixedly installed between the inner wall via ceramic nails, the ceramic nails suspend the heating pipe 3 on the refractory fiber insulation layer 2, and each heating pipe 3 and the heating source are separately connected in parallel in the form of branch.

[0020] The thickness of the refractory fiber insulation layer 2 is between 5 to 15 cm.

[0021] The wheels and the bottom plate are connected in a half-wrapped manner, that is, the bottom plate is provided with a through hole for providing a wheel mounting space, and a square shell-shaped wheel cover 7 is mounted above the through hole, the wheel cover 7 is made of metal, and half to 2 / 3 of the volume of the wheel after mounting is located in the wheel cover 7.

[0022] The furnace door 16 and the furnace body are connected by a vertical electric lifting system.

[0023] The ceramic nails suspend and fix the guide plate 4 on the refractory fiber insulation layer 2.

[0024] The bottom plate 5 is further provided with a transition pressure bearing plate 8 between the three-dimensional wound iron core, the upper part of the transition pressure bearing plate 8 is provided with a positioning tool for each type of three-dimensional wound iron core, and the lower part is provided with a plate spring 9 between the bottom plate 5.

[0025] The bottom plate 5 is provided with a blind hole matched with the wheel cover 7.

[0026] By directly installing aluminum silicate ceramic fiber light high-temperature-resistant insulation material on the inner wall of the furnace shell, both refractoriness and furnace body insulation performance are achieved. The heat energy emitted by the heating element is firmly locked inside the furnace, reducing the loss of heat, and maximizing the effect of heat energy on the product. The temperature inside the furnace is uniform and efficient. The product index tends to be consistent and all qualified.

[0027] 1. During the heating process of the furnace, the furnace shell circulating water cooling system is used to protect the furnace shell and carry away a large amount of valuable heat, resulting in low thermal efficiency of the furnace and high energy consumption.

[0028] By canceling the furnace water circulation cooling system, the source of heat carried away by the water circulation cooling system is cut off. The thermal efficiency of the furnace is improved, and the energy consumption is reduced.

[0029] 2. The stainless steel porcelain sleeve for suspending the heating element is easily damaged during use. After damage, the heating element and the fixing screw are short-circuited, and the furnace body is connected, which causes the furnace shell to be stained and forms a safety hazard. Due to the large number of porcelain sleeves and screws for suspending the heating element and the concealment, the maintenance difficulty is greatly increased.

[0030] By canceling the insulation liner, the high-temperature-resistant insulation ceramic nails directly suspend the heating element on the aluminum silicate ceramic refractory fiber insulation layer 2. The risk of short circuit and electric leakage due to damage of the ceramic part is eliminated.

[0031] 3. The transmission mechanism of the charging car is propelled into the furnace by external force and dragged out of the furnace. The track is arranged at the bottom of the material frame, and the sliding roller is arranged at the bottom of the furnace. The two cooperate to slide in and out. Since the sliding mechanism is entirely placed in the high-temperature state space, the track, material frame, and wheel shaft are deformed at high temperature, making the feeding and discharging process crooked and wobbly, and the feeding and discharging process is prone to overturning. It not only causes safety risks to the personal safety of equipment operators, but also causes damage to the equipment itself and the risk of product scrap.

[0032] By using a load trolley to divide the furnace into two temperature spaces, the upper part of the trolley surface is a high-temperature working area, and the material frame loaded with the iron core is placed on the trolley. The lower part of the trolley surface uses heavy refractory material to bear the weight and temperature separation layer. The lower part is a low-temperature walking area, and the wheels and tracks are placed in the low-temperature area to ensure that the transmission mechanism is in a low-temperature state and is not affected by the high-temperature state. This makes the feeding and discharging trolley walk smoothly and eliminates the risk of tilting due to deformation of the walking mechanism.

[0033] 4. The side opening door greatly increases the actual occupied space of a single device In this embodiment, the furnace door 16 is moved up and down by using a vertical electric lifting system, which effectively reduces the floor area of the furnace itself, reduces the labor intensity of the operator, and improves the labor efficiency. Embodiment 2

[0034] The principle of this embodiment is the same as that of embodiment 1, and the specific difference is that a columnar air duct 10 is installed in the center of the bottom plate 5 in a detachable manner by means of the principle of the chimney effect. The bottom surface of the air duct is provided with a branch air inlet duct 11 that is attached to the bottom plate 5. The branch air inlet duct includes a cold air inlet duct, a hot air inlet duct, and a valve that is selectively connected. The cold air inlet duct is connected to the low-temperature area, and the hot air inlet duct is connected to the high-temperature area. The bottom of the columnar air duct 10 is provided with an electric heating mechanism 12 that forms a chimney effect. The circuit switch of the electric heating mechanism 12 is connected to the outside of the annealing furnace through the bottom of the trolley to form hot air intake. Correspondingly, an electrically controlled air blowing mechanism is provided in the air pipe of the valve and the wheel cover 7 to form cold air intake. During the working process, after the trolley is positioned, a push rod 13 is installed to form a valve and block the cold air branch. During the heating process, heat exchange can be formed inside and outside the three-dimensional iron core, which can effectively prevent the temperature difference between the inside and outside.

[0035] The joint between the wheel cover 7 and the branch air inlet duct 11 is provided with a cold air outlet, and the valve includes a push rod 13 that blocks the cold air outlet. Correspondingly, a side door 14 is provided on the branch air inlet duct 11 to allow the push rod 13 to enter and exit. A hinge is provided between the side door 14 and the branch air inlet duct 11. During the cooling process, after power is turned off, the push rod 13 can be pulled out, the cold air passage is opened, and uniform cooling is facilitated.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application 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 replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A vacuum annealing furnace for three-dimensional coiled iron cores, characterized in that: The annealing furnace comprises a rectangular shell, a light-weight refractory fiber insulation layer (2) made of aluminum silicate ceramic fiber is directly installed on the inner wall of the shell, heating pipes (3) are installed on the inner wall of the annealing furnace, and guide plates (4) are arranged between the heating pipes (3) to form a guide air duct.

2. The vacuum annealing furnace for a three-dimensional volume core according to Claim 1, wherein: The heating pipes (3) are fixedly installed on the inner wall via ceramic nails, the ceramic nails suspend the heating pipes (3) on the refractory fiber insulation layer (2), and each heating pipe (3) is independently and parallelly installed in a branch form between the heating source.

3. The vacuum annealing furnace for a three-dimensional volume core according to Claim 1, wherein: The thickness of the refractory fiber insulation layer (2) is between 5 and 15 cm.

4. The vacuum annealing furnace for a three-dimensional volume core according to Claim 1, wherein: The rolling wheels of the car plate are connected to the car plate in a half-wrapping manner, that is, a through hole is arranged on the car plate to provide a mounting space for the rolling wheels, a square shell-shaped wheel cover (7) is arranged above the through hole, the wheel cover (7) is made of metal, and the volume of the rolling wheels from one half to 2 / 3 is arranged in the wheel cover (7) after the rolling wheels are mounted.

5. The vacuum annealing furnace for a three-dimensional volume core according to Claim 4, wherein: A vertical electric lifting system is arranged between the furnace door (16) and the furnace body.

6. The vacuum annealing furnace for a three-dimensional volume core according to claim 5, wherein: The ceramic nails suspend and fix the guide plates (4) on the refractory fiber insulation layer (2).

7. The vacuum annealing furnace for a three-dimensional volume core according to claim 6, wherein: A transition pressure bearing plate (8) is further arranged between the bottom plate (5) and the three-dimensional wound iron core, a positioning tool for each type of three-dimensional wound iron core is arranged above the transition pressure bearing plate (8), a leaf spring (9) is arranged between the bottom plate (5) and the transition pressure bearing plate (8), and the bottom plate, the transition pressure bearing plate and the leaf spring jointly form the car plate.

8. The vacuum annealing furnace for a three-dimensional volume core according to claim 7, wherein: A blind hole matched with the wheel cover (7) is arranged on the bottom plate (5).

9. The vacuum annealing furnace for a three-dimensional volume core according to Claim 7, wherein: A columnar air duct (10) is further arranged at the center of the bottom plate (5) in a detachable manner, a branch air inlet (11) is arranged on the bottom surface of the air duct to adhere to the bottom plate (5), the branch air inlet comprises a cold air inlet, a hot air inlet and a valve, the cold air inlet is connected to the low-temperature zone, the hot air inlet is connected to the high-temperature zone, an electric heating mechanism (12) is arranged at the bottom of the columnar air duct (10) to form a chimney effect, a circuit switch of the electric heating mechanism (12) is connected to the outside of the annealing furnace via a trolley to form a hot air inlet, and an electrically-controlled blowing mechanism is arranged in a gas pipe in the valve and the wheel cover (7) to form a cold air inlet.

10. The vacuum annealing furnace for a three-dimensional wound core according to claim 9, characterized by: A cold air outlet is arranged at the joint of the wheel cover (7) and the branch air inlet (11), the valve comprises a push rod (13) for plugging the cold air outlet, a side door (14) through which the push rod (13) can pass is arranged on the branch air inlet (11), and a hinge is arranged between the side door (14) and the branch air inlet (11).

Images