A heater for a vacuum furnace

Abstract

The utility model discloses a kind of heaters for vacuum furnace, including support frame and mounting mechanism;Mounting mechanism: it includes T slot, T strip, annular groove, sliding ring, trapezoidal block one, insertion hole, trapezoidal block two and insertion rod, the inner wall of support frame is equipped with the T slot of uniform distribution, T slot is inserted with T strip, the opposite end of T strip is equipped with heating rod respectively, the middle part of support frame outer surface and the opposite end of T strip between being equipped with the insertion hole of uniform distribution, two insertion holes between adjacent are respectively inserted with insertion rod, the middle part of support frame outer surface is equipped with annular groove symmetrical in front and back, two annular grooves are rotatably connected with sliding ring, the inner wall of sliding ring is equipped with the trapezoidal block one of uniform distribution, this heater for vacuum furnace, when using heater, heating rod can be individually replaced and maintained, without removing the whole, maintenance cost is lower, avoid affecting the work efficiency of vacuum furnace.

Description

Technical Field

[0001] This utility model relates to the field of vacuum furnace technology, specifically a heater for a vacuum furnace. Background Technology

[0002] A vacuum furnace is an industrial heat treatment device that creates a high-vacuum environment in a sealed space, and then performs processes such as heating, sintering, brazing, and annealing. In a vacuum environment, there is almost no oxygen, which can completely prevent metal materials from oxidizing and decarburizing at high temperatures, thus maintaining the bright and clean surface and inherent physicochemical properties of the workpiece. At the same time, the vacuum environment helps to extract the gases and impurities adsorbed inside the material at high temperatures, improving the purity and performance of the material. Heating elements will quickly oxidize and burn out at high temperatures in air, but they can work safely and stably in a vacuum. Because it is a pure vacuum or inert gas environment, no impurities are introduced during the process, ensuring the purity of the product. The heat transfer mode in a vacuum environment is mainly radiation, which makes temperature control more uniform and precise. The heater used in a vacuum furnace, also known as the heating element, is the heart of the vacuum furnace. It is responsible for converting electrical energy into heat energy in a vacuum environment, thereby heating the workpiece.

[0003] The existing heaters used in vacuum furnaces are installed inside the furnace by bolts to attach a mounting bracket with heating rods. When it is necessary to replace or maintain a heating rod, the bolts need to be unscrewed, the mounting bracket needs to be removed, and the heating rod can be replaced or maintained.

[0004] Existing heaters for vacuum furnaces have the following problems: when using the heater, if it is necessary to replace or maintain a certain heating rod, the entire mounting frame with the heating rod needs to be removed for replacement and maintenance, which results in high maintenance costs and affects the working efficiency of the vacuum furnace. Therefore, we propose a heater for vacuum furnaces. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a heater for a vacuum furnace. When using the heater, the heating rod can be replaced and maintained separately without disassembling the whole unit. This reduces maintenance costs and avoids affecting the working efficiency of the vacuum furnace, effectively solving the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heater for a vacuum furnace, comprising a support frame and a mounting mechanism;

[0007] The installation mechanism includes T-slots, T-bars, annular grooves, sliding rings, trapezoidal blocks (I), insertion holes, trapezoidal blocks (II), and insertion rods. The inner wall of the support frame has evenly distributed T-slots, with T-bars inserted into each slot. Heating rods are positioned at opposite ends of the T-bars. Evenly distributed insertion holes are located between the middle of the outer surface of the support frame and the opposing ends of the T-bars. Insertion rods are inserted between adjacent insertion holes. A symmetrical annular groove is located in the middle of the outer surface of the support frame, with a sliding ring rotatably connected between the two annular grooves. Evenly distributed trapezoidal blocks (I) are located on the inner wall of the sliding ring. Trapezoidal blocks (II) are fixedly connected to the opposing ends of the insertion rods. The inclined surfaces of trapezoidal blocks (I) and adjacent trapezoidal blocks (II) are slidably connected. When using the heater, the heating rods can be replaced and maintained individually without disassembling the entire unit, resulting in lower maintenance costs and avoiding impact on the vacuum furnace's working efficiency.

[0008] Furthermore, the installation mechanism also includes springs. The lower end of the trapezoidal block two is fixedly connected to the middle of the outer surface of the support frame with evenly distributed telescopic rods. Springs are sleeved on the outside of the telescopic rods to facilitate rebound.

[0009] Furthermore, it also includes an adjustment assembly, which includes an annular cover, a worm gear, and a worm. The annular cover is disposed in the middle of the outer surface of the support frame, the worm gear is fixedly sleeved on the outer surface of the sliding ring, and the worm is rotatably connected to the inner wall of the annular cover. The worm gear and the worm are meshed together to provide a transmission connection.

[0010] Furthermore, the adjustment assembly also includes a support rod, which is fixedly connected to the left end of the worm gear to provide support.

[0011] Furthermore, the adjustment assembly also includes an adjustment wheel, which is fixedly connected to the left end of the support rod for easy adjustment.

[0012] Furthermore, mounting plates are provided at both the front and rear ends of the support frame for easy installation.

[0013] Furthermore, the inner wall of the T-slot fits tightly against the outer surface of the adjacent T-strip, reducing heat loss.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This heater for a vacuum furnace has the following advantages:

[0015] When installing the heating rod, insert the T-shaped strip with the heating rod into the T-slot for initial positioning. Then, the adjusting wheel and support rod cause the worm gear and meshing worm wheel to drive the sliding ring to rotate along the annular groove. The sliding ring drives trapezoidal block one to press against trapezoidal block two, which in turn drives the insertion rod to insert into the insertion hole that passes through the support frame and the T-shaped strip, rigidly connecting the T-shaped strip to the support frame. When the heating rod needs to be replaced or maintained, reverse the operation of the adjusting wheel, worm gear, worm wheel, and sliding ring. The pressing force of trapezoidal block one against trapezoidal block two gradually decreases, causing the insertion rod to be pulled out of the insertion hole, releasing the locking of the T-shaped strip, and realizing the individual and quick disassembly and replacement of the heating rod. When using the heater, the heating rod can be replaced and maintained individually without disassembling the whole unit, resulting in lower maintenance costs and avoiding affecting the working efficiency of the vacuum furnace. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a cross-sectional view of the installation mechanism of this utility model;

[0019] Figure 4 This is an enlarged structural diagram of point A in this utility model;

[0020] Figure 5 This is an enlarged structural diagram of section B of the present invention.

[0021] In the diagram: 1. Support frame, 2. Mounting mechanism, 21. T-slot, 22. T-bar, 23. Annular groove, 24. Sliding ring, 25. Trapezoidal block one, 26. Insertion hole, 27. Spring, 28. Trapezoidal block two, 29. Insertion rod, 3. Adjustment component, 31. Annular cover, 32. Worm gear, 33. Worm, 34. Support rod, 35. Adjusting wheel, 4. Heating rod, 5. Mounting plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This embodiment provides a technical solution: a heater for a vacuum furnace, including a support frame 1 and an installation mechanism 2. The support frame 1 is a nickel-based high-temperature alloy cylindrical support frame, which serves as the core load-bearing frame when the heater is in use.

[0024] Installation mechanism 2 includes T-slots 21, T-bars 22, annular grooves 23, sliding rings 24, trapezoidal blocks 1 25, insertion holes 26, trapezoidal blocks 28, and insertion rods 29. The inner wall of the support frame 1 is provided with evenly distributed T-slots 21. T-bars 22 are inserted into the inside of the T-slots 21. All T-bars 22 are nickel-based high-temperature alloy T-bars. Heating rods 4 are provided at the opposite ends of the T-bars 22. The input end of the heating rods 4 is electrically connected to an external power source. The heating rods 4 are existing Cr20Ni80φ8×200mm1.5kW iron-chromium-aluminum alloy heating rods.

[0025] The support frame 1 has evenly distributed insertion holes 26 between the middle of its outer surface and the opposite ends of the T-shaped strip 22. Insertion rods 29 are inserted between two adjacent insertion holes 26. The middle of the outer surface of the support frame 1 has symmetrical annular grooves 23. A sliding ring 24 is rotatably connected between the two annular grooves 23. The inner wall of the sliding ring 24 has evenly distributed trapezoidal blocks 25. The opposite ends of the insertion rods 29 are fixedly connected to trapezoidal blocks 28. The inclined surface of trapezoidal block 25 is slidably connected to the inclined surface of the adjacent trapezoidal block 28. The inner wall of the T-shaped groove 21 is tightly fitted with the outer surface of the adjacent T-shaped strip 22. The heating rod 4 is installed at the opposite end of the T-shaped strip 22. The T-shaped strip serves as the direct carrier of the heating rod and is connected to the support frame 1 through the installation mechanism 2 to achieve the positioning and fixing of the heating rod 4. The T-shaped strip 22 and the T-shaped groove 21 on the inner wall of the support frame 1 are tightly inserted.

[0026] When the heating rod 4 needs to be installed, first insert the T-shaped strip 22 with the heating rod 4 into the corresponding T-shaped groove 21. At this time, the heating rod is initially positioned by the cooperation between the T-shaped groove 21 and the T-shaped strip 22, avoiding lateral swaying. Then, the sliding ring 24 rotates along the inside of the annular groove 23. The trapezoidal block 25 on the inner wall of the sliding ring 24 rotates synchronously with the sliding ring 24. The inclined surface of the trapezoidal block 25 slides into contact with the inclined surface of the trapezoidal block 28. The trapezoidal block 25 will press the trapezoidal block 28 inward, causing the plug-in rod 29 to move inward. At the same time, it compresses the telescopic rod and the spring 27. The plug-in rod 29 is inserted into the through support frame 1 and the T-shaped groove 23. The insertion hole 26 of the T-shaped strip 22 rigidly connects the T-shaped strip 22 to the support frame 1, thereby locking the heating rod 4. When the heating rod 4 needs to be replaced or maintained, the adjusting wheel 35 is operated in the reverse direction, the worm gear 33 rotates in the reverse direction, driving the worm wheel 32 and the sliding ring 24 to rotate in the reverse direction. The squeezing force of the trapezoidal block 1 25 on the trapezoidal block 28 gradually decreases, and the spring 27 extends under the action of elastic restoring force, pushing the trapezoidal block 28 to move outward, driving the insertion rod 29 to be pulled out from the insertion hole 26, releasing the lock on the T-shaped strip 22. At this time, the T-shaped strip 22 can be pulled out along the T-groove 21, realizing the individual and quick disassembly and replacement of the heating rod 4.

[0027] The mounting mechanism 2 also includes a spring 27. The lower end of the trapezoidal block 28 and the middle of the outer surface of the support frame 1 are respectively fixedly connected with evenly distributed telescopic rods. The telescopic rods are respectively fitted with springs 27. The support frame 1 is installed by mounting plate 5 and bolts. The annular cover 31 will be installed by screws. After long-term use, the spring 27 will lose its elasticity and needs to be replaced. When replacement is required, first unscrew the bolts, then take out the support frame 1, then unscrew the screws, take out the annular cover 31, then replace all the internal parts of the annular cover 31, install the new parts, then install the annular cover 31 by screws, and after installation, reinstall the support frame 1 by mounting plate 5 and bolts to provide a reset for easy fixation.

[0028] It also includes an adjustment component 3, which includes an annular cover 31, a worm gear 32, and a worm 33. The annular cover 31 is located in the middle of the outer surface of the support frame 1. The worm gear 32 is fixedly sleeved on the outer surface of the sliding ring 24. The worm 33 is rotatably connected to the inner wall of the annular cover 31. The worm gear 32 and the worm 33 are meshed together. Both the worm gear 32 and the worm 33 are located inside the annular cover 31 to prevent dust from adhering and affecting the transmission effect. The adjustment component 3 also includes a support rod 34, which is fixedly connected to the left end of the worm 33. The adjustment component 3 also includes an adjustment wheel 35, which is fixedly connected to the left end of the support rod 34. The left end of the worm 33 and the right end of the support rod 34 are connected by a slot and a locking block. Then, by rotating the adjustment wheel 35, the adjustment wheel 35 drives the worm 33 to rotate inside the annular cover 31 through the support rod 34. The worm 33 meshes with the worm gear 32 fixed on the outer surface of the sliding ring 24.

[0029] Mounting plates 5 are provided at the front and rear ends of the support frame 1. The entire heater is fixed in the vacuum furnace by the mounting plates 5 at the front and rear ends of the support frame 1. The outer surface of the vacuum furnace can be provided with clearance holes corresponding to the support rod 34. During installation, the worm gear 33 is aligned with the clearance hole. Then, during adjustment, the support rod 34 is passed through the clearance hole so that the slot engages with the locking block. Then, the adjusting wheel 35 is rotated.

[0030] The working principle of the heater for a vacuum furnace provided by this utility model is as follows: When the heater is in use, the support frame 1 is the core load-bearing frame, and the entire heater is fixed in the vacuum furnace by the mounting plates 5 at the front and rear ends of the support frame 1.

[0031] The heating rod 4 is installed at the opposite end of the T-shaped strip 22. The T-shaped strip 22 serves as the direct carrier of the heating rod 4 and is connected to the support frame 1 through the installation mechanism 2 to achieve the positioning and fixation of the heating rod 4. The T-shaped strip 22 and the T-shaped groove 21 on the inner wall of the support frame 1 are tightly inserted into each other. When it is necessary to install the heating rod 4, the T-shaped strip 22 with the heating rod 4 is first inserted into the corresponding T-shaped groove 21. At this time, the heating rod is initially positioned through the cooperation between the T-shaped groove 21 and the T-shaped strip 22 to avoid lateral shaking.

[0032] Next, by rotating the adjusting wheel 35, the adjusting wheel 35 drives the worm gear 33 to rotate inside the annular cover 31 via the support rod 34. The worm gear 33 meshes with the worm wheel 32 fixed on the outer surface of the sliding ring 24, thereby driving the sliding ring 24 to rotate along the inside of the annular groove 23. The trapezoidal block 25 on the inner wall of the sliding ring 24 rotates synchronously with the sliding ring 24. The inclined surface of the trapezoidal block 25 slides into contact with the inclined surface of the trapezoidal block 28. The trapezoidal block 25 will press the trapezoidal block 28 inward, driving the plug rod 29 to move inward, while compressing the telescopic rod and the spring 27. The plug rod 29 is inserted into the plug hole 26 that passes through the support frame 1 and the T-shaped strip 22, rigidly connecting the T-shaped strip 22 and the support frame 1, thereby locking the heating rod 4.

[0033] When the heating rod 4 needs to be replaced or maintained, the adjusting wheel 35 is reversed, the worm gear 33 rotates in the opposite direction, driving the worm wheel 32 and the sliding ring 24 to rotate in the opposite direction. The squeezing force of trapezoidal block 1 25 on trapezoidal block 28 gradually decreases. The spring 27 extends under the action of elastic restoring force, pushing trapezoidal block 28 to move outward, driving the plug rod 29 to be pulled out from the plug hole 26, releasing the lock on the T-shaped strip 22. At this time, the T-shaped strip 22 can be pulled out along the T-shaped groove 21, realizing the individual and quick disassembly and replacement of the heating rod 4.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A heater for a vacuum furnace, characterized in that: Includes a support frame (1) and an installation mechanism (2); The mounting mechanism (2) includes a T-slot (21), a T-bar (22), an annular groove (23), a sliding ring (24), a trapezoidal block one (25), a plug hole (26), a trapezoidal block two (28), and a plug rod (29). The inner wall of the support frame (1) is provided with evenly distributed T-slots (21). T-bars (22) are inserted into the inside of the T-slots (21). Heating rods (4) are provided at opposite ends of the T-bars (22). A space is provided between the middle of the outer surface of the support frame (1) and the opposite ends of the T-bars (22). There are evenly distributed insertion holes (26), and insertion rods (29) are inserted between two adjacent insertion holes (26). The middle part of the outer surface of the support frame (1) is provided with a front-to-back symmetrical annular groove (23). A sliding ring (24) is rotatably connected between the two annular grooves (23). The inner wall of the sliding ring (24) is provided with a uniformly distributed trapezoidal block one (25). The opposite ends of the insertion rods (29) are respectively fixedly connected to trapezoidal block two (28). The inclined surface of trapezoidal block one (25) is slidably connected to the inclined surface of the adjacent trapezoidal block two (28).

2. A heater for a vacuum furnace according to claim 1, characterized in that: The installation mechanism (2) also includes a spring (27). The lower end of the trapezoidal block (28) and the middle part of the outer surface of the support frame (1) are respectively fixedly connected with evenly distributed telescopic rods, and the telescopic rods are respectively fitted with springs (27).

3. A heater for a vacuum furnace according to claim 1, characterized in that: It also includes an adjustment component (3), which includes an annular cover (31), a worm gear (32) and a worm (33). The annular cover (31) is located in the middle of the outer surface of the support frame (1). The worm gear (32) is fixedly sleeved on the outer surface of the sliding ring (24). The worm (33) is rotatably connected to the inner wall of the annular cover (31). The worm gear (32) and the worm (33) are meshed together.

4. A heater for a vacuum furnace according to claim 3, characterized in that: The adjustment assembly (3) also includes a support rod (34), which is fixedly connected to the left end of the worm gear (33).

5. A heater for a vacuum furnace according to claim 4, characterized in that: The adjustment assembly (3) also includes an adjustment wheel (35), which is fixedly connected to the left end of the support rod (34).

6. A heater for a vacuum furnace according to claim 1, characterized in that: The support frame (1) is provided with mounting plates (5) at both the front and rear ends.

7. A heater for a vacuum furnace according to claim 1, characterized in that: The inner wall of the T-groove (21) fits tightly against the outer surface of the adjacent T-strip (22).

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