Vacuum heat treatment furnace capable of controlling pressure relief

Abstract

The utility model relates to the technical field of heat treatment equipment, in particular to a vacuum heat treatment furnace capable of controlling pressure relief. The vacuum heat treatment furnace capable of controlling pressure relief comprises a vacuum furnace, an upper cover is arranged at the top of the vacuum furnace, a sealing sleeve is arranged at the top of the upper cover, a cooling cylinder is arranged on one side of the sealing sleeve, and a sealing ring is fixedly connected to the top of the upper cover. By arranging the supporting block, the connecting block and the fixing block, the device can be operated to conduct pressure relief on the vacuum furnace regularly, the safety of the device is guaranteed, by arranging the fixing block and the elastic piece, when the pressure is too large, the pressure relief pipe can be opened to conduct automatic discharge on the internal pressure, explosion caused by the too large internal pressure of the furnace body is avoided, and the safety of the device is guaranteed. The explosion-proof effect of the device is improved, in addition, the cooling cylinder and the pressure relief pipe are arranged, the exhausted gas can be cooled, and the Freon can be fully and efficiently used through the appearance structure of the cooling cylinder.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment equipment technology, specifically to a vacuum heat treatment furnace with controllable pressure relief. Background Technology

[0002] Vacuum hot press furnaces mainly consist of furnace body, furnace door, heating and heat preservation and temperature measurement system, vacuum system, gas filling system, water cooling system, control system, hydraulic system, etc. Vacuum hot press furnaces are cycle-operated and are widely used for hot pressing and sintering of cemented carbide, functional ceramics, powder metallurgy, etc. under high temperature and high vacuum conditions. They can also be hot pressed and sintered under gas filling protection.

[0003] Patent document CN215856291 U discloses a multi-purpose furnace with controllable atmosphere for heat treatment, "including a multi-purpose furnace body, an explosion-proof mechanism, and a cooling mechanism. The explosion-proof mechanism includes an explosion-proof valve fixed to the multi-purpose furnace body, a pressure relief pipe connected to the explosion-proof valve, a pressure relief channel opened inside the explosion-proof valve, a guide cylinder fixedly connected inside the pressure relief channel, a valve core movably connected inside the guide cylinder, and an elastic element disposed on the valve core. In this invention, when the internal pressure of the multi-purpose furnace body is too high, the internal gas pressure will drive the valve core to squeeze the elastic element, opening the pressure relief pipe to release the internal pressure, which can prevent the multi-purpose furnace body from exploding due to excessive internal pressure. Furthermore, during pressure relief, the control valve is opened to allow the liquid Freon stored in the storage tank to flow downwards, utilizing the principle of Freon vaporization and heat absorption to cool the discharged gas."

[0004] However, in the above solution, the pressure relief pipe can be opened to release the internal pressure by squeezing the elastic element of the valve core. However, the equipment is only suitable when the internal pressure of the vacuum furnace is too high. As a safety feature of the equipment, it is difficult to control the equipment to release the pressure of the vacuum furnace periodically, which reduces the explosion-proof effect of the vacuum furnace and may pose a safety hazard. Utility Model Content

[0005] The purpose of this invention is to overcome the problem that the vacuum heat treatment furnace with controllable pressure relief in the prior art cannot be depressurized periodically, and thus provide a vacuum heat treatment furnace with controllable pressure relief.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a vacuum heat treatment furnace with controllable pressure relief, comprising:

[0007] A vacuum furnace, wherein the top of the vacuum furnace is provided with a top cover, the top of the top cover is provided with a sealing sleeve, and a cooling cylinder is provided on one side of the sealing sleeve;

[0008] A sealing ring is fixedly connected to the top of the cover, and the outer surface of the sealing ring is fixedly connected to the inner wall of the sealing sleeve. A guide cylinder is fixedly installed on the inner wall of the sealing ring, and a fixing block is slidably connected to the inner wall of the guide cylinder. A connecting block is fixedly installed on one side of the fixing block.

[0009] A guide rod is fixedly connected to one side of the connecting block. A mounting frame is fitted onto the outer surface of the guide rod, and a support block is fixedly installed on the top of the mounting frame.

[0010] As an optional technical solution, a pressure relief pipe is fitted into the inner wall of the cooling cylinder, and one side of the pressure relief pipe is fixedly connected to one side of the guide cylinder. A water inlet is provided on the outer surface of the cooling cylinder.

[0011] As an optional technical solution, a support frame is fixedly installed on the top of the sealing sleeve, and the inner wall of the support frame is connected through the outer surface of the support block.

[0012] As an optional technical solution, the inner wall of the support frame is provided with a limiting frame, and both sides of the support frame are fitted with limiting blocks, and the outer surface of the limiting blocks is slidably connected to the inner wall of the limiting frame.

[0013] As an optional technical solution, a spring is fitted onto the outer surface of the limiting block, and one side of the spring is fixedly connected to the inner wall of the limiting frame.

[0014] As an optional technical solution, an elastic element is fixedly installed on the top of the fixing block, and a limit plate is fixedly connected to the top of the elastic element.

[0015] As an optional technical solution, the outer surface of the guide cylinder is provided with a groove, and the outer surface of the connecting block overlaps the inner wall of the groove.

[0016] The technical solution provided by this utility model has the following technical effects:

[0017] 1. The controllable pressure relief vacuum heat treatment furnace provided by this utility model includes a vacuum furnace, a sealing ring, and a guide rod. The top of the vacuum furnace is provided with a top cover, the top of the top cover is provided with a sealing sleeve, a cooling cylinder is provided on one side of the sealing sleeve, the sealing ring is fixedly connected to the top of the top cover, and the outer surface of the sealing ring is fixedly connected to the inner wall of the sealing sleeve. A guide cylinder is fixedly installed on the inner wall of the sealing ring, a fixing block is slidably connected to the inner wall of the guide cylinder, a connecting block is fixedly installed on one side of the fixing block, and a guide rod is fixedly connected to one side of the connecting block. An installation frame is fitted to the outer surface of the guide rod, and a support block is fixedly installed on the top of the installation frame.

[0018] By using a combination of support blocks, connecting blocks, and fixing blocks, the equipment can periodically depressurize the vacuum furnace, ensuring the safety of the device. By setting fixing blocks and elastic elements, when the pressure is too high, the pressure relief pipe can be opened to automatically release the internal pressure, preventing the furnace body from exploding due to excessive internal pressure, thus improving the explosion-proof effect of the device and further enhancing the safety of the equipment. In addition, the sealing sleeve and sealing ring ensure the sealing performance of the vacuum furnace, improving the quality of operation.

[0019] 2. The vacuum heat treatment furnace with controllable pressure relief provided by this utility model includes a cooling cylinder, a water inlet and a pressure relief pipe. The pressure relief pipe is fitted and connected to the inner wall of the cooling cylinder, and one side of the pressure relief pipe is fixedly connected to one side of the guide cylinder. The water inlet is provided on the outer surface of the cooling cylinder.

[0020] By using a combination of cooling cylinder, water inlet, and pressure relief pipe, the exhaust gas can be cooled down, preventing the exhaust gas from being too hot and causing burns to workers. Furthermore, the shape and structure of the cooling cylinder allow for the full and effective use of Freon, avoiding the waste of resources caused by improper use of Freon. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the fixing block structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the guide cylinder structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the cooling cylinder structure of this utility model;

[0025] Figure 5 For the present utility model in Figure 2 Schematic diagram of the structure at point A in the diagram;

[0026] In the diagram: 1. Vacuum furnace; 2. Top cover; 3. Sealing sleeve; 4. Cooling cylinder; 5. Sealing ring; 6. Guide cylinder; 7. Fixing block; 8. Connecting block; 9. Guide rod; 10. Mounting frame; 11. Support block; 12. Pressure relief pipe; 13. Water inlet; 14. Support frame; 15. Limiting frame; 16. Limiting block; 17. Spring; 18. Elastic element; 19. Limiting plate; 20. Slide groove. Detailed Implementation

[0027] like Figures 1 to 5As shown, a controllable pressure relief vacuum heat treatment furnace includes a vacuum furnace 1, a top cover 2 on the top of the vacuum furnace 1, a sealing sleeve 3 on the top of the top cover 2, a cooling cylinder 4 on one side of the sealing sleeve 3, a sealing ring 5, the sealing ring 5 is fixedly connected to the top of the top cover 2, and the outer surface of the sealing ring 5 is fixedly connected to the inner wall of the sealing sleeve 3, a guide cylinder 6 is fixedly installed on the inner wall of the sealing ring 5, a fixing block 7 is slidably connected to the inner wall of the guide cylinder 6, a connecting block 8 is fixedly installed on one side of the fixing block 7, a guide rod 9 is fixedly connected to one side of the connecting block 8, an installation frame 10 is fitted onto the outer surface of the guide rod 9, a support block 11 is fixedly installed on the top of the installation frame 10, a groove 20 is opened on the outer surface of the guide cylinder 6, and the outer surface of the connecting block 8 overlaps the inner wall of the groove 20.

[0028] By applying rightward or leftward force to the two limiting blocks 16 respectively, the limiting blocks 16 compress the spring 17, and then apply upward force to the support block 11. The support block 11 then moves the mounting frame 10 upward, and the mounting frame 10 moves the guide rod 9 and the connecting block 8 upward. Then the connecting block 8 moves the fixing block 7 upward, so that the opening of the pressure relief pipe 12 is connected to the inlet of the guide cylinder 6. The pressure flows outward through the pressure relief pipe 12, and the equipment can be operated to relieve pressure on the vacuum furnace 1, which improves the explosion-proof effect of the device. By setting the sealing sleeve 3 and the sealing ring 5, the sealing performance of the vacuum furnace 1 can be improved, thereby ensuring the working effect of the vacuum furnace 1.

[0029] The inner wall of the cooling cylinder 4 is fitted with a pressure relief pipe 12, and one side of the pressure relief pipe 12 is fixedly connected to one side of the guide cylinder 6. The outer surface of the cooling cylinder 4 is provided with a water inlet 13.

[0030] Liquid Freon is poured into the cooling cylinder 4 through the water inlet 13. By utilizing the principle of Freon liquefaction and heat absorption, the discharged gas can be cooled down, preventing the discharged gas temperature from being too high and causing burns to the staff. At the same time, the cooling cylinder 4 can make full and effective use of Freon, avoiding the situation of waste of resources due to improper use of Freon.

[0031] A support frame 14 is fixedly installed on the top of the sealing sleeve 3, and the inner wall of the support frame 14 is connected through to the outer surface of the support block 11. A limit frame 15 is provided on the inner wall of the support frame 14. Limit blocks 16 are fitted and connected on both sides of the support frame 14, and the outer surface of the limit block 16 is slidably connected to the inner wall of the limit frame 15. A spring 17 is fitted and connected to the outer surface of the limit block 16, and one side of the spring 17 is fixedly connected to the inner side wall of the limit frame 15.

[0032] By pushing the support block 11 downward, the support block 11 pushes the mounting frame 10 and guide rod 9 downward. Then, the guide rod 9 pushes the fixing block 7 downward through the connecting block 8, thereby blocking the opening of the pressure relief pipe 12. Then, the limiting block 16 is lowered, and the spring 17 pushes the two limiting blocks 16 to move in opposite directions, thereby fixing the support block 11 and keeping the vacuum furnace 1 sealed, thus ensuring the working quality.

[0033] An elastic element 18 is fixedly installed on the top of the fixed block 7, and a limit plate 19 is fixedly connected to the top of the elastic element 18.

[0034] When the internal pressure of the vacuum furnace 1 is too high, the pressure flows into the guide cylinder 6 and then applies upward force to the fixing block 7. After that, the fixing block 7 squeezes the elastic element 18. At the same time, the fixing block 7 drives the connecting block 8 and the guide rod 9 to move upward. Then the guide rod 9 is embedded into the mounting frame 10. At this time, the fixing block 7 separates from the opening of the pressure relief pipe 12, and the internal pressure is released through the pressure relief pipe 12 to prevent the furnace body from exploding due to excessive internal pressure, thus further improving the explosion-proof effect of the device.

[0035] The working principle is as follows: by moving the support block 11 upward, the support block 11 moves the guide rod 9 and connecting block 8 upward through the mounting frame 10. Then, the connecting block 8 moves the fixing block 7 upward, exposing the opening of the pressure relief pipe 12. The pressure flows out of the vacuum furnace 1 through the opening of the pressure relief pipe 12 from the inlet of the guide cylinder 6. This allows the equipment to periodically depressurize the vacuum furnace 1, improving the safety of the device. When the internal pressure of the vacuum furnace 1 is too high, the pressure pushes the fixing block 7 upward. Then, the fixing block 7 squeezes the elastic element 18, causing the fixing block 7 to separate from the opening of the pressure relief pipe 12. The pressure is released through the pressure relief pipe 12, preventing the furnace body from exploding due to excessive internal pressure. This improves the explosion-proof effect of the device and enhances the safety of the equipment. In addition, liquid Freon is poured into the cooling cylinder 4. Through the principle of Freon liquefaction and heat absorption, the exhaust gas can be cooled, preventing the exhaust gas temperature from being too high and causing burns to the staff. Furthermore, the setting of the cooling cylinder 4 allows for the full and effective use of Freon, avoiding the waste of resources caused by improper use of Freon.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A controllable pressure relief vacuum heat treatment furnace, comprising: a vacuum furnace (1), characterized in that: the top of the vacuum furnace (1) is provided with an upper cover (2), the top of the upper cover (2) is provided with a sealing sleeve (3), one side of the sealing sleeve (3) is provided with a cooling cylinder (4); a sealing ring (5) is fixedly connected to the top of the upper cover (2), and the outer surface of the sealing ring (5) is fixedly connected with the inner wall of the sealing sleeve (3), the inner wall of the sealing ring (5) is fixedly installed with a guide cylinder (6), the inner wall of the guide cylinder (6) is slidingly connected with a fixed block (7), one side of the fixed block (7) is fixedly installed with a connecting block (8); a guide rod (9) is fixedly connected to one side of the connecting block (8), the outer surface of the guide rod (9) is embeddedly connected with a mounting frame (10), and the top of the mounting frame (10) is fixedly installed with a supporting block (11).

2. The controllably pressure-relieved vacuum heat treatment furnace according to claim 1, characterized by The inner wall of the cooling cylinder (4) is embeddedly connected with a pressure relief pipe (12), and one side of the pressure relief pipe (12) is fixedly connected with one side of the guide cylinder (6), and the outer surface of the cooling cylinder (4) is provided with a water inlet (13).

3. The controllably pressure-relieved vacuum thermal processing furnace according to claim 1, characterized by, The top of the sealing sleeve (3) is fixedly installed with a supporting frame (14), and the inner wall of the supporting frame (14) is penetratingly connected with the outer surface of the supporting block (11).

4. The controllably pressure-relieved vacuum heat treatment furnace according to claim 3, characterized by The inner wall of the supporting frame (14) is provided with a limiting frame (15), and both sides of the supporting frame (14) are embeddedly connected with a limiting block (16), and the outer surface of the limiting block (16) is slidingly connected with the inner wall of the limiting frame (15).

5. The controllably pressure-relieved vacuum heat treatment furnace according to claim 4, characterized by The outer surface of the limiting block (16) is sleevedly connected with a spring (17), and one side of the spring (17) is fixedly connected with the inner side wall of the limiting frame (15).

6. The controllably pressure-relieved vacuum heat treatment furnace according to claim 1, characterized by The top of the fixed block (7) is fixedly installed with an elastic member (18), and the top of the elastic member (18) is fixedly connected with a limiting plate (19).

7. The controllably pressure-relieved vacuum heat treatment furnace according to claim 1, characterized by The outer surface of the guide cylinder (6) is provided with a sliding groove (20), and the outer surface of the connecting block (8) is lapped on the inner wall of the sliding groove (20).

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