Exhaust device of vacuum furnace
By designing a vacuum grate exhaust device including a one-way circulation mechanism and a quick connection mechanism, the complex gas return and docking operations during the vacuum grate exhaust process is solved, and efficient exhaust and convenient connection are achieved.
Patent Information
- Application Number
- CN202421136003.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-23
AI Technical Summary
During the exhaust process of the vacuum furnace, the system pressure drops suddenly, resulting in gas return to the existing exhaust device, which affects the exhaust effect, and the docking operation between the exhaust device and the vacuum furnace is complicated.
An exhaust device of a vacuum furnace is designed, including a condenser, a vacuum pump and a vacuum furnace connection pipe. The condenser surface is equipped with an intake pipe and an exhaust pipe. A one-way circulation mechanism and a quick connection mechanism are provided in the exhaust pipe. The one-way circulation mechanism avoids gas return through the one-way circulation mechanism. The quick connection mechanism simplifies the connection operation of the vacuum furnace connection pipe.
It effectively avoids gas return, improves exhaust effect, and simplifies the docking operation between the exhaust device and the vacuum furnace, ensuring good sealing performance and convenient connection process.
Smart Images
Figure CN222635234U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vacuum exhaust, in particular to an exhaust device for a vacuum furnace. Background Art
[0002] A vacuum furnace is a furnace that uses a vacuum system to discharge part of the material in the furnace cavity in a specific space, so that the pressure in the furnace cavity is less than a standard atmospheric pressure, and the space in the furnace cavity is in a vacuum state. When the vacuum furnace is exhausted, the gas passes through the condenser, the temperature drops and liquefies into water droplets, the pressure in the system drops sharply, and even negative pressure occurs at the exhaust of the system. The negative pressure will cause gas reflux in the exhaust device in the prior art, resulting in poor exhaust effect and inability to effectively achieve vacuum exhaust. In addition, the docking operation between the exhaust device and the vacuum furnace is complicated, and it is not convenient to connect the condenser. For this reason, an exhaust device for a vacuum furnace is proposed. Utility Model Content
[0003] The purpose of the utility model is to provide an exhaust device for a vacuum furnace to solve the problems raised in the above background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an exhaust device for a vacuum furnace, comprising a condenser, a vacuum pump and a vacuum furnace connecting pipe, the surface of the condenser is provided with an air inlet pipe and an exhaust pipe, the outlet end of the exhaust pipe is fixedly connected to the vacuum pump, a one-way flow mechanism is provided inside the exhaust pipe, a quick-connect mechanism for connecting to the vacuum furnace connecting pipe is provided at one end of the air inlet pipe, a limiting groove and an annular groove are provided on the surface of the vacuum furnace connecting pipe, and a sealing rubber ring is fixedly connected to the inner side wall of the annular groove.
[0005] As a preferred embodiment, the one-way flow mechanism includes a first baffle, a second baffle, a vent, a sleeve, a slide rod, a vent cavity, a stop plate, a sealing gasket and a second return spring. The first baffle and the second baffle are fixedly connected to the inner wall of the exhaust pipe, a vent cavity is provided between the first baffle and the second baffle, and evenly arranged vents are provided on the surfaces of the first baffle and the second baffle.
[0006] As a preferred solution, the surfaces of the first baffle and the second baffle are both embedded with sliding sleeves, the inner side walls of the sliding sleeves are slidably connected to sliding rods, the surfaces of the sliding rods are fixedly connected to stop plates, the surfaces of the stop plates are fixedly connected to sealing pads, and the sealing pads are made of rubber material.
[0007] As a preferred solution, a second return spring is fixedly connected between the cut-off plate and the second baffle plate, and the second return spring is sleeved outside the sliding rod.
[0008] As a preferred solution, the quick-connect mechanism includes a fixing part, a pressure block, a spring cavity, a return spring, a ball groove, a limit ball and a slot. One end of the air intake pipe is slidably connected to the fixing part, the inner side wall of the fixing part is fixedly connected to the pressure block, a spring cavity is formed between the pressure block and the air intake pipe, and a first return spring is arranged on the inner side wall of the spring cavity.
[0009] As a preferred solution, one end of the air inlet pipe is provided with evenly arranged ball grooves, and a limiting ball is placed on the inner side wall of the ball groove.
[0010] As a preferred solution, a slot is provided at one end of the air inlet pipe, and one end of the vacuum furnace connecting pipe can be inserted into the slot.
[0011] Technical effects and advantages of the utility model:
[0012] 1. When the gas flows to the first baffle, the gas flows to the stop plate through the vent hole, the gas presses the stop plate, the gas flows into the ventilation cavity, and then passes out through the vent hole on the second baffle. When the stop plate moves, the spring is compressed, so that the spring is in a compressed state. When the gas stops flowing or flows back, the second return spring loses pressure and returns to the initial state. One end of the second return spring moves to drive the stop plate to move, and the stop plate moves to drive the sealing gasket thereon to move. The ventilation cavity is sealed by the movement of the sealing gasket, which can effectively avoid gas reflux, prevent gas or other substances from flowing back into the pipeline system, and ensure the exhaust effect.
[0013] 2. When connecting the vacuum furnace connecting pipe, you can first move the fixing piece, and the movement of the fixing piece drives the pressure block to move. The pressure block moves and compresses the first return spring, so that the first return spring is in a compressed state, and then directly inserts the vacuum furnace connecting pipe. After the vacuum furnace connecting pipe is inserted into the slot, loosen the fixing piece, and the first return spring recovers to its initial state after losing pressure. One end of the first return spring moves to drive the pressure block to move, and the pressure block moves to abut against the limiting ball, so that the limiting ball sinks into the limiting groove, thereby completing the limiting of the vacuum furnace connecting pipe, that is, completing the connection of the air inlet pipe and the vacuum furnace connecting pipe. The connection operation of the vacuum furnace connecting pipe is simple and convenient, and the sealing rubber ring abuts against the inner wall of the slot to ensure the sealing effect, ensure good sealing performance, and facilitate the connection of the vacuum furnace connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0015] Figure 2 For this utility model Figure 1 A magnified view of the structure in the middle.
[0016] Figure 3 For this utility model Figure 2 A magnified view of the structure at B in the middle.
[0017] Figure 4This is a schematic diagram of the structure of the vacuum furnace connecting pipe of the utility model when it is not inserted into the air inlet pipe.
[0018] In the figure: 1. condenser; 2. vacuum pump; 3. air inlet pipe; 4. exhaust pipe; 5. fixing piece; 6. pressure block; 7. spring chamber; 8. first return spring; 9. ball groove; 10. limiting ball; 11. slot; 12. vacuum furnace connecting pipe; 13. ring groove; 14. sealing rubber ring; 15. limiting groove; 16. first baffle; 17. second baffle; 18. vent hole; 19. sliding sleeve; 20. sliding rod; 21. ventilation chamber; 22. stop plate; 23. sealing pad; 24. second return spring. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] The utility model provides Figure 1-4 An exhaust device for a vacuum furnace is shown, comprising a condenser 1, a vacuum pump 2 and a vacuum furnace connecting pipe 12. An air inlet pipe 3 and an exhaust pipe 4 are arranged on the surface of the condenser 1. The outlet end of the exhaust pipe 4 is fixedly connected to the vacuum pump 2. A one-way flow mechanism is arranged inside the exhaust pipe 4. A quick-connect mechanism for connecting to the vacuum furnace connecting pipe 12 is arranged at one end of the air inlet pipe 3. A limiting groove 15 and an annular groove 13 are arranged on the surface of the vacuum furnace connecting pipe 12. A sealing rubber ring 14 is fixedly connected to the inner wall of the annular groove 13.
[0021] In this embodiment, the one-way flow mechanism includes a first baffle 16, a second baffle 17, a vent 18, a sleeve 19, a slide rod 20, a vent cavity 21, a stop plate 22, a sealing gasket 23 and a second return spring 24. The first baffle 16 and the second baffle 17 are fixedly connected to the inner wall of the exhaust pipe 4. A vent cavity 21 is provided between the first baffle 16 and the second baffle 17. The surfaces of the first baffle 16 and the second baffle 17 are provided with evenly arranged vents 18. The surfaces of the first baffle 16 and the second baffle 17 are embedded with a sleeve 19. The inner wall of the sleeve 19 is slidably connected to the slide rod 20. The surface of the slide rod 20 is fixedly connected to the stop plate 22. The surface of the stop plate 22 is fixedly connected to the sealing gasket 23. The sealing gasket 23 is made of rubber material. The stop plate 22 and the second baffle 17 are fixedly connected. A second return spring 24 is fixedly connected, and the second return spring 24 is sleeved outside the slide rod 20; when the gas flows to the first baffle 16, the gas flows to the stop plate 22 through the vent hole 18, the gas presses the stop plate 22, the gas flows into the ventilation cavity 21, and then passes out through the vent hole 18 on the second baffle 17. When the stop plate 22 moves, the spring is compressed, so that the spring is in a compressed state. When the gas stops flowing or flows back, the second return spring 24 loses pressure and returns to its initial state. One end of the second return spring 24 moves to drive the stop plate 22 to move, and the stop plate 22 moves to drive the sealing gasket 23 thereon to move. The movement of the sealing gasket 23 forms a seal on the ventilation cavity 21, which can effectively avoid gas reflux, prevent gas or other substances from flowing back into the pipeline system, and ensure the exhaust effect.
[0022] In this embodiment, the quick-connect mechanism includes a fixing member 5, a pressure block 6, a spring cavity 7, a return spring, a ball groove 9, a limit ball 10 and a slot 11. The fixing member 5 is slidably connected to one end of the air inlet pipe 3, and the inner wall of the fixing member 5 is fixedly connected to the pressure block 6. A spring cavity 7 is formed between the pressure block 6 and the air inlet pipe 3. The inner wall of the spring cavity 7 is provided with a first return spring 8. One end of the air inlet pipe 3 is provided with evenly arranged ball grooves 9, and the inner wall of the ball groove 9 is placed with a limit ball 10. One end of the air inlet pipe 3 is provided with a slot 11, and one end of the vacuum furnace connecting pipe 12 can be inserted into the slot 11; when connecting the vacuum furnace connecting pipe 12, the fixing member 5 can be first moved, and the movement of the fixing member 5 drives the pressure block 6 to move, and the pressure block 6 moves to compress the first return spring 8. The first reset spring 8 is positioned so that the first return spring 8 is in a compressed state, and then the vacuum furnace connecting pipe 12 is directly inserted into the vacuum furnace connecting pipe 12. After the vacuum furnace connecting pipe 12 is inserted into the slot 11, the fixing piece 5 is released, and the first reset spring 8 recovers to its initial state after losing pressure. The movement of one end of the first reset spring 8 drives the pressure block 6 to move, and the pressure block 6 moves to abut against the limiting ball 10, so that the limiting ball 10 is immersed in the limiting groove 15, thereby completing the limiting of the vacuum furnace connecting pipe 12, that is, completing the connection between the air inlet pipe 3 and the vacuum furnace connecting pipe 12. The connection operation of the vacuum furnace connecting pipe 12 is simple and convenient, and the sealing rubber ring 14 abuts against the inner wall of the slot 11 to ensure the sealing effect, ensure good sealing performance, and facilitate the connection of the vacuum furnace connecting pipe 12.
[0023] Working principle of the utility model: the utility model is an exhaust device for a vacuum furnace. When connecting the vacuum furnace connecting pipe 12, the fixing piece 5 can be first moved, and the movement of the fixing piece 5 drives the pressure block 6 to move, and the pressure block 6 moves to compress the first return spring 8, so that the first return spring 8 is in a compressed state, and then directly inserted into the vacuum furnace connecting pipe 12. After the vacuum furnace connecting pipe 12 is inserted into the slot 11, the fixing piece 5 is released, and the first return spring 8 recovers to the initial state after losing pressure, and one end of the first return spring 8 moves to drive the pressure block 6 to move, and the pressure block 6 moves to abut against the limiting ball 10, so that the limiting ball 10 is immersed in the limiting groove 15, thereby completing the limiting of the vacuum furnace connecting pipe 12, that is, completing the air inlet pipe 3 and the vacuum furnace connecting pipe 12 connection; when the gas flows to the first baffle 16, the gas flows to the stop plate 22 through the vent hole 18, the gas presses the stop plate 22, the gas flows into the ventilation cavity 21, and then passes out through the vent hole 18 on the second baffle 17. When the stop plate 22 moves, the spring is compressed, so that the spring is in a compressed state. When the gas stops flowing or flows back, the second return spring 24 loses pressure and returns to the initial state. One end of the second return spring 24 moves to drive the stop plate 22 to move. The stop plate 22 moves and drives the sealing gasket 23 thereon to move. The ventilation cavity 21 is sealed by the movement of the sealing gasket 23, which can effectively avoid gas reflux and prevent gas or other substances from flowing back into the pipeline system.
[0024] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An exhaust device for a vacuum furnace, characterized in that: The invention comprises a condenser (1), a vacuum pump (2) and a vacuum furnace connecting pipe (12); an air inlet pipe (3) and an exhaust pipe (4) are arranged on the surface of the condenser (1); the outlet end of the exhaust pipe (4) is fixedly connected to the vacuum pump (2); a one-way flow mechanism is arranged inside the exhaust pipe (4); one end of the air inlet pipe (3) is provided with a quick-connect mechanism for connecting to the vacuum furnace connecting pipe (12); a limiting groove (15) and an annular groove (13) are arranged on the surface of the vacuum furnace connecting pipe (12); a sealing rubber ring (14) is fixedly connected to the inner wall of the annular groove (13).
2. The exhaust device of a vacuum furnace according to claim 1, characterized in that: The one-way flow mechanism comprises a first baffle (16), a second baffle (17), a vent hole (18), a sliding sleeve (19), a sliding rod (20), a vent cavity (21), a stop plate (22), a sealing gasket (23) and a second return spring (24); the first baffle (16) and the second baffle (17) are fixedly connected to the inner wall of the exhaust pipe (4); a vent cavity (21) is provided between the first baffle (16) and the second baffle (17); and the vent holes (18) are evenly arranged on the surfaces of the first baffle (16) and the second baffle (17).
3. The exhaust device of a vacuum furnace according to claim 2, characterized in that: The surfaces of the first baffle plate (16) and the second baffle plate (17) are both embedded with a sliding sleeve (19), the inner side wall of the sliding sleeve (19) is slidably connected to a sliding rod (20), the surface of the sliding rod (20) is fixedly connected to a stop plate (22), the surface of the stop plate (22) is fixedly connected to a sealing gasket (23), and the sealing gasket (23) is made of rubber material.
4. The exhaust device of a vacuum furnace according to claim 3, characterized in that: A second return spring (24) is fixedly connected between the stop plate (22) and the second baffle plate (17), and the second return spring (24) is sleeved outside the slide rod (20).
5. The exhaust device of a vacuum furnace according to claim 1, characterized in that: The quick-connect mechanism comprises a fixing member (5), a pressure block (6), a spring cavity (7), a return spring, a ball groove (9), a limit ball (10) and a slot (11); one end of the air intake pipe (3) is slidably connected to the fixing member (5); the inner side wall of the fixing member (5) is fixedly connected to the pressure block (6); a spring cavity (7) is formed between the pressure block (6) and the air intake pipe (3); and a first return spring (8) is arranged on the inner side wall of the spring cavity (7).
6. The exhaust device of a vacuum furnace according to claim 1, characterized in that: One end of the air inlet pipe (3) is provided with evenly arranged ball grooves (9), and a limiting ball (10) is placed on the inner wall of the ball groove (9).
7. The exhaust device of a vacuum furnace according to claim 1, characterized in that: A slot (11) is provided at one end of the air inlet pipe (3), and one end of the vacuum furnace connecting pipe (12) can be inserted into the slot (11).