Electromagnetic heating roller with internal coil that is easy to replace

Abstract

The utility model relates to the technical field of electromagnetic heating roller, and disclose a kind of electromagnetic heating roller of internal coil convenient to replace, including upper installation shell and lower installation shell, heating coil is installed between upper installation shell and lower installation shell, the both sides of upper installation shell and lower installation shell are fixedly installed with fixed half ring, multiple fixed half ring inside are rotatably installed with sliding half ring, limit hole is equidistantly set up on fixed half ring, the inside of sliding half ring is provided with locking mechanism and ejection mechanism. The utility model is through quick-release half ring structure, pneumatic locking and spring return mechanism, realize shell quick disassembly and coil convenient replacement;With alignment auxiliary and positioning structure, ensure that assembly is accurate, operation is safe and efficient, significantly improve maintenance convenience and automation adaptation ability.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic heating roller technology, specifically to an electromagnetic heating roller with an easily replaceable internal coil. Background Technology

[0002] Electromagnetic heating rollers, as a highly efficient, energy-saving, and environmentally friendly heating device, are widely used in drying, calendering, and shaping processes in industries such as papermaking, printing, textiles, plastic film, and composite materials. Their working principle involves using a high-frequency alternating current to generate an alternating magnetic field through an induction coil, causing eddy currents to form inside the roller (usually a magnetically conductive metal material), thus generating heat and achieving rapid and uniform temperature control of the roller surface. Traditional electromagnetic heating rollers typically have the induction coil fixedly encapsulated inside the roller body, integrally formed with the roller core or support structure, or installed in a non-removable manner.

[0003] The patent currently published with the number CN223540721U discloses a heat coil for a high-temperature electromagnetic induction heating roller that is easy to replace. It includes a placement tube with an arc-shaped groove 1 and an arc-shaped groove 2 on its surface. A heating coil 1 is installed in the arc-shaped groove 1, and a heating coil 2 is installed in the arc-shaped groove 2. Support tube 1 and support tube 2 are detachably connected to the two ends of the placement tube, respectively. A bearing 1 is fixedly connected to support tube 1, and a bearing 2 is fixedly connected to support tube 2. A fixing seat is fixedly connected to both bearing 1 and bearing 2. The two fixing seats face opposite directions. Two semi-cylindrical shells are detachably connected to the two fixing seats. A gear is fixedly connected to bearing 1.

[0004] However, the above-mentioned device has the following problems when in use: When in use, the device relies on flanges to fix the support pipes spliced ​​at the upper and lower ends. Specifically, flanges with bolt holes are set at the ends of the two pipe sections, and multiple sets of bolts are inserted on both sides and tightened with nuts to achieve the overall stability of the structure. However, in order to ensure a firm connection, operators usually need to tighten all the bolts repeatedly in a diagonal sequence. This is not only cumbersome and time-consuming, but also restricts the operating space and the use of tools. In scenarios that require frequent disassembly and assembly (such as equipment maintenance, component replacement, or temporary construction work), this flange connection method that relies on multi-point bolt tightening significantly reduces the efficiency of installation and disassembly, and it is difficult to meet the actual needs of rapid replacement and efficient assembly. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing an electromagnetic heating roller that facilitates the replacement of internal coils, thereby significantly improving equipment maintenance efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An electromagnetic heating roller with an easily replaceable internal coil includes an upper mounting shell and a lower mounting shell. A heating coil is installed between the upper and lower mounting shells. Fixed half-rings are fixedly installed on both sides of the upper and lower mounting shells. Sliding half-rings are rotatably installed inside the multiple fixed half-rings. Limiting holes are equidistantly provided on the fixed half-rings. The sliding half-rings are provided with a locking mechanism and an ejection mechanism inside.

[0007] Preferably, the two fixed half-rings on the same side can be spliced ​​into a complete ring, and the sliding half-ring on the lower fixed half-ring can enter the interior of the corresponding upper fixed half-ring.

[0008] Preferably, the locking mechanism includes a limiting rod, which is slidably mounted on the sliding half-ring. The limiting rod is adapted to the limiting hole. A mounting plate is fixedly mounted on the side of the limiting rod away from the sliding half-ring. A return spring is fixedly mounted on the side of the mounting plate facing the sliding half-ring. The other end of the return spring is fixedly mounted on the inner wall of the sliding half-ring.

[0009] Preferably, the ejection mechanism includes an airbag installed inside the sliding half-ring. The sliding half-ring is equipped with an inflation / deflation port connected to the airbag. When the airbag inflates, the limiting rod is ejected from the sliding half-ring.

[0010] Preferably, an operating block is fixedly installed on the sliding half-ring, and a baffle is fixedly installed on the fixed half-ring. When the operating block abuts against the baffle, the limiting rod aligns with the corresponding limiting hole.

[0011] Preferably, fixing blocks are fixedly installed on both sides of the upper mounting shell, and positioning blocks are fixedly installed on both sides of the lower mounting shell, with positioning grooves adapted to the positioning blocks on the fixing blocks.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention achieves fast, safe, and precise maintenance operations through a combination of pneumatic locking and mechanical positioning. Its core "inflation-locking, deflation-unlocking" mechanism (with the airbag and return spring working in tandem) allows operators to fix and release the sliding half-ring simply by inflating or deflating the airbag, significantly improving coil replacement efficiency. Combined with the alignment design of the operating block and baffle, and the precise positioning system of the fixing block and positioning block, it effectively prevents assembly misalignment, ensuring the closing accuracy and structural stability of the housing. The overall design significantly reduces maintenance time and operational difficulty, providing an ideal solution for daily equipment maintenance and automated control. Attached Figure Description

[0013] Figure 1 A schematic diagram of an electromagnetic heating roller that facilitates the replacement of its internal coil, as proposed in this utility model. Figure 2This utility model provides a schematic diagram of the installation position of the heating coil of an electromagnetic heating roller that facilitates the replacement of its internal coil. Figure 3 This invention provides an electromagnetic heating roller with an easily replaceable internal coil. Figure 1 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the installation position of the sliding half-ring of an electromagnetic heating roller that facilitates the replacement of the internal coil, as proposed in this utility model. Figure 5 This invention provides an electromagnetic heating roller with an easily replaceable internal coil. Figure 4 Enlarged view at point B in the middle; Figure 6 This is a schematic diagram of the installation position of an electromagnetic heating roller airbag that facilitates the replacement of internal coils, as proposed in this utility model. Figure 7 This invention provides an electromagnetic heating roller with an easily replaceable internal coil. Figure 6 Enlarged view of point C.

[0014] In the diagram: 1. Upper mounting shell; 2. Lower mounting shell; 3. Fixed half ring; 4. Sliding half ring; 5. Positioning block; 6. Fixing block; 7. Heating coil; 8. Operating block; 9. Baffle; 10. Limiting hole; 11. Inflation / depression port; 12. Positioning groove; 13. Limiting rod; 14. Airbag; 15. Mounting plate; 16. Return spring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Please see Figures 1 to 7 An electromagnetic heating roller with an easily replaceable internal coil includes an upper mounting shell 1 and a lower mounting shell 2. A heating coil 7 is installed between the upper mounting shell 1 and the lower mounting shell 2. The specific installation position and installation method of the heating coil 7 are the same as the corresponding part in the prior art CN223540721U. Since this part is prior art, it will not be described in detail here.

[0017] Both sides of the upper mounting shell 1 and the lower mounting shell 2 are fixedly installed with fixed half rings 3. Each of the multiple fixed half rings 3 has a sliding half ring 4 rotatably installed inside. Limiting holes 10 are opened at equal intervals on the fixed half rings 3. The sliding half ring 4 is equipped with a locking mechanism and an ejection mechanism.

[0018] The upper mounting shell 1 and the lower mounting shell 2, through the combination of the fixed half ring 3 and the sliding half ring 4, allow users to quickly disassemble and assemble the shell, thereby easily accessing the heating coil 7. The locking mechanism is used to fix the position of the sliding half ring 4, while the ejection mechanism cooperates with the locking mechanism to fix the sliding half ring 4 when needed, ensuring the splicing effect.

[0019] like Figure 4 As shown, the two fixed half-rings 3 on the same side can be spliced ​​into a complete ring, and the sliding half-ring 4 on the lower fixed half-ring 3 can enter the interior of the corresponding upper fixed half-ring 3.

[0020] During operation, when the upper mounting shell 1 and the lower mounting shell 2 are closed, the fixed half ring 3 aligns to form a complete circular structure, providing uniform support and stability. The sliding half ring 4 can slide from the lower side into the upper fixed half ring 3, which facilitates the quick separation and connection of the two shells when replacing the heating coil 7, reducing disassembly time.

[0021] like Figure 7 As shown, the locking mechanism includes a limiting rod 13, which is slidably mounted on the sliding half-ring 4. The limiting rod 13 is adapted to the limiting hole 10. A mounting plate 15 is fixedly mounted on the side of the limiting rod 13 away from the sliding half-ring 4. A return spring 16 is fixedly mounted on the side of the mounting plate 15 facing the sliding half-ring 4. The other end of the return spring 16 is fixedly mounted on the inner wall of the sliding half-ring 4.

[0022] like Figure 7 As shown, the locking mechanism locks the position of the sliding half-ring 4 by inserting the limiting rod 13 into the limiting hole 10 on the fixed half-ring 3, ensuring that the sliding half-ring 4 will not move accidentally. When adjustment or disassembly is required, the sliding half-ring 4 can be released by disengaging the limiting rod 13 from the limiting hole 10, enabling quick disassembly.

[0023] It is worth noting that the limiting rod 13 is always partially in contact with the sliding half ring 4, so that the limiting rod 13 can only move in one direction on the sliding half ring 4, preventing it from completely disengaging or being lost, thus improving the reliability and safety of the mechanism.

[0024] like Figure 6 As shown, the ejection mechanism includes an airbag 14, which is installed inside the sliding half-ring 4. An inflation / deflation port 11 is installed on the sliding half-ring 4 and is connected to the airbag 14. When the airbag 14 inflates, the limiting rod 13 is ejected from the sliding half-ring 4.

[0025] It is worth noting that there is a one-way valve inside the inflation / deflation port 11, and a cap is installed on the inflation / deflation port 11 by means of threads.

[0026] In its default natural state, the return spring 16 installed inside the sliding half-ring 4 continuously applies elastic force, driving the limit rod 13 to remain in an inward retracted state, thus disengaging it from the upper limit hole 10 of the fixed half-ring 3, thereby achieving the normally closed unlocking of the mechanism. When the mechanism needs to be locked, the airbag 14 is inflated by an external air source. As the airbag 14 expands, it generates a strong force that pushes the limit rod 13 outward. This force directly overcomes the retraction force of the return spring 16, stably pushing the limit rod 13 out and precisely inserting it into the limit hole 10, thus completing a secure mechanical lock.

[0027] This "inflation extends and locks, deflates and retracts to unlock" working mode not only achieves labor-saving and linear precise operation through pneumatics, but also has inherent safety features: in the event of a gas outage or when locking is not required, the mechanism will automatically reset to the unlocked state under the action of the return spring 16, effectively preventing the risk of accidental locking, while also providing convenience for remote control and automation integration.

[0028] like Figure 5 As shown, an operating block 8 is fixedly installed on the sliding half-ring 4, and a baffle 9 is fixedly installed on the fixed half-ring 3. When the operating block 8 abuts against the baffle 9, the limiting rod 13 aligns with the corresponding limiting hole 10. The operating block 8 and the baffle 9 serve as visual and tactile alignment aids. During the assembly process, the user slides the operating block 8 until it contacts the baffle 9. At this time, the limiting rod 13 automatically aligns with the limiting hole 10, ensuring that the locking mechanism can engage smoothly. This reduces misoperation and improves assembly efficiency and accuracy.

[0029] like Figure 2 As shown, fixing blocks 6 are fixedly installed on both sides of the upper mounting shell 1, and positioning blocks 5 are fixedly installed on both sides of the lower mounting shell 2. The fixing blocks 6 are provided with positioning grooves 12 that are adapted to the positioning blocks 5. The fixing blocks 6 and positioning blocks 5 ensure that the upper mounting shell 1 and the lower mounting shell 2 are precisely aligned when closed through the positioning grooves 12. During the installation process, the positioning blocks 5 are inserted into the positioning grooves 12 to provide a stable connection and positioning, and prevent the shells from being misaligned.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic heating roller with an easily replaceable internal coil, comprising an upper mounting shell (1) and a lower mounting shell (2), wherein a heating coil (7) is installed between the upper mounting shell (1) and the lower mounting shell (2), characterized in that, Fixed half rings (3) are fixedly installed on both sides of the upper mounting shell (1) and the lower mounting shell (2). Sliding half rings (4) are rotatably installed inside the multiple fixed half rings (3). Limiting holes (10) are opened at equal intervals on the fixed half rings (3). The sliding half rings (4) are equipped with a locking mechanism and an ejection mechanism.

2. The electromagnetic heating roller with easily replaceable internal coil according to claim 1, characterized in that, Two fixed half-rings (3) on the same side can be spliced ​​into a complete ring, and the sliding half-ring (4) on the lower fixed half-ring (3) can enter the interior of the corresponding upper fixed half-ring (3).

3. The electromagnetic heating roller with easily replaceable internal coil according to claim 1, characterized in that, The locking mechanism includes a limiting rod (13), which is slidably mounted on the sliding half ring (4). The limiting rod (13) is adapted to the limiting hole (10). A mounting plate (15) is fixedly mounted on the side of the limiting rod (13) away from the sliding half ring (4). A return spring (16) is fixedly mounted on the side of the mounting plate (15) facing the sliding half ring (4). The other end of the return spring (16) is fixedly mounted on the inner wall of the sliding half ring (4).

4. An electromagnetic heating roller with easily replaceable internal coils according to claim 3, characterized in that, The ejection mechanism includes an airbag (14), which is installed inside a sliding half-ring (4). An inflation / deflation port (11) is installed on the sliding half-ring (4), and the inflation / deflation port (11) is connected to the airbag (14). When the airbag (14) inflates, the limiting rod (13) is ejected from the sliding half-ring (4).

5. An electromagnetic heating roller with easily replaceable internal coils according to claim 3, characterized in that, An operating block (8) is fixedly installed on the sliding half ring (4), and a baffle (9) is fixedly installed on the fixed half ring (3). When the operating block (8) abuts against the baffle (9), the limiting rod (13) aligns with the corresponding limiting hole (10).

6. An electromagnetic heating roller with easily replaceable internal coils according to claim 1, characterized in that, Fixing blocks (6) are fixedly installed on both sides of the upper mounting shell (1), and positioning blocks (5) are fixedly installed on both sides of the lower mounting shell (2). Positioning grooves (12) adapted to the positioning blocks (5) are provided on the fixing blocks (6).

Images