Device capable of protecting impact temperature of component preheating furnace
By installing heat-deformable metal sheets and push rod structures inside the preheating furnace, and automatically disconnecting the reset switch to cut off power, the problem of excessively high temperature caused by temperature sensor failure is solved, component damage is prevented, and production costs are reduced.
Patent Information
- Application Number
- CN202423151502.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-20
AI Technical Summary
The existing preheating furnace temperature sensor malfunction caused the spinning assembly temperature to be too high, resulting in a decrease in the sealing of the aluminum material connection, component damage that is difficult to detect in a timely manner.
A heat-deformable metal sheet and a push rod structure are installed inside the preheating furnace. The deformation of the heat-deformable metal sheet pushes the push rod to disconnect the reset switch, thereby achieving automatic power-off and preventing overheating.
It effectively prevents component damage caused by excessively high preheating furnace temperature, reduces production costs, and improves equipment safety.
Smart Images
Figure CN223783388U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of spinning component preheating furnace, specifically to a device that can protect the component preheating furnace from overheating. Background Technology
[0002] A preheating furnace is a device for preheating spinning components. Its main structure consists of an insulated furnace body, heating rods, a temperature sensor, a motor, a fan, and an electrical control cabinet (including a temperature controller, relays, a power supply, and an input power source). Normally, a set value, such as 320℃, is set for the temperature controller. The sensor monitors the furnace temperature in real time and sends this information to the temperature controller, which then controls the relay to keep the heating rods heating, maintaining the temperature at the set 320℃. However, in workshops with many preheating furnaces, temperature sensor malfunctions or inaccurate temperature readings frequently cause the temperature controller to close the relay, resulting in continuous heating of the heating rods. This causes the actual temperature of the spinning components to far exceed the set value. Since the internal components are connected by aluminum alloys, excessively high temperatures can compromise the sealing of these connections, rendering the components unusable. Furthermore, temperature sensor malfunctions are often not detected immediately. Therefore, a device is needed to prevent the preheating furnace from overheating. Summary of the Invention
[0003] In order to solve one or more technical problems existing in the prior art, the purpose of this application is to provide a device that can protect the preheating furnace of the component from overheating, which can effectively solve the problem of damage to the spinning component caused by excessively high temperature during preheating of the preheating furnace.
[0004] To solve the aforementioned technical problems, this application adopts the following technical solution:
[0005] A device for protecting a component preheating furnace from overheating includes a furnace body, a relay and a control power supply located on one side of the furnace body. A limiting hole is provided on the side wall of the furnace body, and a push rod is inserted through the limiting hole. A heat-deformable metal sheet is provided inside the furnace body to push the push rod outwards. A reset mechanism is provided on the outside of the furnace body to reset the push rod. A reset switch is provided on one of the power lines between the relay and the control power supply. The outer end of the heat-deformable metal sheet is adjacent to the reset switch. The relay can disconnect the reset switch and cut off power by pushing the push rod outwards after the heat-deformable metal sheet is heated and deformed.
[0006] Preferably, the push rod has a cylindrical structure, and a drive ring is provided on the push rod to fit against one side of the heat-deformable metal sheet.
[0007] Preferably, the heat-deformable metal sheet has a length of 5-8 cm, a width of 1.5-2.5 cm, and a thickness of 0.5-1.5 mm, and one end of the heat-deformable metal sheet has a bending displacement distance of not less than 5 mm at 340°C.
[0008] Preferably, the heat-deformable metal sheet comprises a copper sheet and an iron sheet that are bonded together, one end of the heat-deformable metal sheet is fixed to the inner wall of the furnace body, and one side of the iron sheet is bonded to the drive ring.
[0009] Preferably, the reset mechanism includes a protrusion on one side of the push rod and a reset spring with its two ends fixed to the protrusion and the outer wall of the furnace body, respectively.
[0010] Preferably, the reset switch is a self-reset switch.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] By adding a push rod that can be moved by a heat-deformable metal sheet and a reset switch that can be opened and closed by the push rod to the furnace body, the preheating furnace can be automatically shut off when the temperature inside the furnace is too high. This effectively solves the problem of internal component melting and damage caused by a special fault (low resistance) of the temperature sensor inside the furnace giving the heating system a false impression, which leads to the furnace accepting continuous heating requirements. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model;
[0014] In the diagram: 1. Reset mechanism; 11. Protrusion; 12. Reset spring; 2. Drive ring; 3. Push rod; 4. Furnace body; 5. Heat-deformed metal sheet; 51. Copper sheet; 52. Iron sheet; 6. Limit hole; 7. Reset switch; 8. Relay; 9. Control power supply. Detailed Implementation
[0015] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0016] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0017] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0018] like Figure 1 As shown, a device for protecting the preheating furnace of components from overheating includes a furnace body 4, a relay 8 located on one side of the furnace body 4, and a control power supply 9. A limiting hole 6 is provided on the side wall of the furnace body 4, and a push rod 3 is inserted through the limiting hole 6. A heat-deformable metal sheet 5 is provided inside the furnace body 4 to push the push rod 3 outward. A reset mechanism 1 for resetting the push rod 3 is provided on the outside of the furnace body 4. A reset switch 7 is provided on one of the power lines between the relay 8 and the control power supply 9. The outer end of the heat-deformable metal sheet 5 is adjacent to the reset switch 7. The relay 8 can disconnect the reset switch 7 to cut off the power by pushing the push rod 3 outward after the heat-deformable metal sheet 5 is heated and deformed.
[0019] In the actual modification process, a limiting hole 6 was opened on the existing preheating furnace body 4. Then, the push rod 3 was installed in the limiting hole 6, with its two ends located on the inner and outer sides of the furnace body 4, respectively. The position of the push rod 3 was axially limited by the reset mechanism 1. Then, a heat-deformable metal sheet 5 was installed on the inner wall of the heating area of the furnace body 4. When the temperature inside the furnace body 4 is too high, the deformation of the heat-deformable metal sheet 5 can drive the push rod 3 to move outward. At the same time, a reset switch 7 was installed on one of the power lines of the relay 8 and the control power supply 9. The reset switch 7 is normally closed. When the temperature rises, the heat-deformable metal sheet 5 bends and deforms. After the heat-deformable metal sheet 5 bends and deforms due to overheating inside the furnace body 4, it can push the push rod 3 to move outward, so that the outer end of the push rod 3 presses against the reset switch 7 and forms an open state, ultimately achieving the power-off control of the relay 8. When the temperature inside the furnace body 4 drops, the heat-deformable metal sheet 5 slowly resets. At the same time, the reset mechanism 1 drives the push rod 3 to retract inward, thereby realizing the re-closing of the reset switch 7. Here, the relative position of push rod 3 and reset switch 7 can be adjusted so that when the temperature reaches a certain level, the reset switch 7 is disconnected. For example, when the temperature reaches 380℃, push rod 3 can just touch the reset switch 7 and disconnect it, thus achieving the effect of shutting off heating. When the temperature of furnace body 4 drops, the reset switch 7 can be clicked again to reset, thus achieving the effect of resetting the timer. Because the components are basically not damaged at 400℃, and the heat-deformable metal sheet 5 has low precision, setting it to 380℃ can effectively set the upper limit temperature cutoff without causing damage to the components. When the temperature sensor malfunctions (low resistance) and gives the heating system a false impression, causing the furnace to accept continuous heating, the added structure can effectively solve the problem of excessively high internal heating temperature of furnace body 4 causing component damage.
[0020] A further improvement is that the push rod 3 has a cylindrical structure, and a drive ring 2 is provided on the push rod 3 to fit against one side of the heat-deformable metal sheet 5.
[0021] The push rod 3 adopts a cylindrical structure, and a drive ring 2 is formed on the push rod 3 to fit one side of the heat-deformed metal sheet 5. This makes the push rod 3 more flexible when sliding. A smooth sleeve can be used inside the limiting hole 6 for transition. After assembly, the drive ring 2 makes the fit between the push rod 3 and the heat-deformed metal sheet 5 more stable, avoiding the problem that the push rod 3 cannot achieve mutual drive after rotation.
[0022] A further improvement is that the length of the heat-deformable metal sheet 5 is 5-8cm, the width is 1.5-2.5cm, and the thickness is 0.5-1.5mm, and the bending displacement distance of one end of the heat-deformable metal sheet 5 at 340℃ is not less than 5mm.
[0023] Since the process requires that the components will not be scrapped if the temperature is below 400℃, they can be reheated to the usable temperature and continue to be used. The normal preheating temperature is 320℃. Therefore, when setting the heat-deformed metal sheet 5, when its bending displacement distance is not less than 5mm at 340℃, the reset switch 7 can be effectively controlled to cut off, so that the heating temperature in the furnace body 4 is just exceeded and then cut off, which can effectively reduce production costs.
[0024] A further improvement is made in that the heat-deformable metal sheet 5 includes a copper sheet 51 and an iron sheet 52 that are bonded together, one end of the heat-deformable metal sheet 5 is fixed to the inner wall of the furnace body 4, and one side of the iron sheet 52 is bonded to the drive ring 2.
[0025] The heat-deformable metal sheet 5 is composed of copper sheets 51 and iron sheets 52 that are bonded together, which can effectively control the deformation direction of the heat-deformable metal sheet 5 and avoid the problem of uncertain bending direction. The heat-deformable metal sheets 5 inside the furnace body 4 are arranged in groups, and each group of heat-deformable metal sheets 5 is matched with a drive ring 2, which can make its precision higher and avoid the occurrence of individual setting failure.
[0026] A further improvement is made to the reset mechanism 1, which includes a protrusion 11 on one side of the push rod 3 and a reset spring 12 with its two ends fixed on the protrusion 11 and the outer wall of the furnace body 4, respectively.
[0027] The push rod 3 is reset by the return spring 12, which is simpler and cheaper. In addition, a protrusion 11 is formed on one side of the push rod 3 to fix the return spring 12. The combination of the return spring 12 and the protrusion 11 can limit the radial position of the push rod 3 and prevent it from rotating.
[0028] A further improvement is that the reset switch 7 is a self-reset switch 7.
[0029] When the reset switch 7 is cut off by the push rod 3, causing the temperature of the furnace body 4 to drop, when the temperature drops to a certain level, the push rod 3 retracts through the heat-deformed metal sheet 5 and the reset spring 12. The reset switch 7 is a self-resetting switch 7, which can automatically close the reset switch 7 again to reheat after the temperature drops to a certain level, thereby reducing the component's reheat time.
[0030] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.
Claims
1. A device for protecting the preheating furnace of components from overheating, comprising a furnace body (4), a relay (8) disposed on one side of the furnace body (4), and a control power supply (9), characterized in that: A limiting hole (6) is provided on the side wall of the furnace body (4), and a push rod (3) is provided through the limiting hole (6). A heat-deformable metal sheet (5) is provided inside the furnace body (4) to push the push rod (3) outward. A reset mechanism (1) is provided on the outside of the furnace body (4) to reset the push rod (3). A reset switch (7) is provided on one of the power lines between the relay (8) and the control power supply (9). The outer end of the heat-deformable metal sheet (5) is adjacent to the reset switch (7). The relay (8) can disconnect the reset switch (7) and cut off the power by pushing the push rod (3) outward after the heat-deformable metal sheet (5) is heated and deformed.
2. The device for protecting the preheating furnace of components according to claim 1, characterized in that: The push rod (3) has a cylindrical structure, and a drive ring (2) is provided on the push rod (3) to fit against one side of the heat-deformable metal sheet (5).
3. The device for protecting the preheating furnace of components according to claim 2, characterized in that: The heat-deformable metal sheet (5) has a length of 5-8cm, a width of 1.5-2.5cm, and a thickness of 0.5-1.5mm. The bending displacement distance of one end of the heat-deformable metal sheet (5) at 340℃ is not less than 5mm.
4. The device for protecting the preheating furnace of components according to claim 3, characterized in that: The heat-deformable metal sheet (5) includes a copper sheet (51) and an iron sheet (52) that are attached to each other. One end of the heat-deformable metal sheet (5) is fixed to the inner wall of the furnace body (4), and one side of the iron sheet (52) is attached to the drive ring (2).
5. The device for protecting the preheating furnace of components according to claim 1, characterized in that: The reset mechanism (1) includes a protrusion (11) on one side of the push rod (3) and a reset spring (12) with its two ends fixed on the protrusion (11) and the outer wall of the furnace body (4), respectively.
6. The device for protecting the preheating furnace of components according to claim 1, characterized in that: The reset switch (7) is a self-reset switch (7).