A sealing connection device for a vacuum sintering furnace

Abstract

The utility model relates to sealing connecting device technical field especially relates to a kind of vacuum sintering furnace sealing connecting device.Its technical scheme includes furnace body, rotates and installs on the cover of furnace body, further include cooling cavity being located on the cover, sealing body being fixedly installed in cooling cavity, the flow-through groove being equipped with in sealing body and cooling cavity intercommunication, input pipe and output pipe being fixedly installed on the cover and with cooling cavity intercommunication, hydraulic balance component being installed on the cover, the hydraulic balance component includes the detection cylinder being fixedly installed on the cover and with cooling cavity intercommunication, detection plate being slidably installed in the detection cylinder and moving according to the hydraulic pressure size inside cooling cavity.The utility model is directly contacted with the design of sealing body by water cooling device, cooling liquid and sealing body high-efficiency heat exchange, rapidly export high-temperature heat load, strictly control sealing interface temperature in material tolerance threshold, completely avoid rubber carbonization, metal creep and other thermal failure.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing connection devices, and in particular to a sealing connection device for a vacuum sintering furnace. Background Technology

[0002] A vacuum sintering furnace is a core industrial device that densifies metal, ceramic, or composite powder materials using high temperatures in a highly sealed vacuum or controlled atmosphere environment. Its core principle is to eliminate air from the furnace chamber through a vacuum system, thus preventing high-temperature oxidation and contamination of the material by oxygen and impurity gases. Simultaneously, the high-temperature environment drives atomic diffusion and grain boundary migration between powder particles, ultimately forming a high-density, high-strength, and homogeneous sintered body. This technology is widely used in high-end manufacturing fields such as cemented carbide cutting tools, ceramic matrix composites, high-temperature alloy turbine blades, magnetic materials, and nuclear fuel pellets.

[0003] To maintain the airtightness of the furnace body, a sealing structure needs to be installed at the connection between the cover and the furnace body. However, the working temperature of the furnace chamber often reaches 1200°C-2400°C, and the long-term temperature resistance limit of the sealing ring is usually ≤320°C. Short-term overheating or excessive heat radiation can cause the rubber to permanently harden, crack, lose elasticity, and fail to seal. Generally, a water cooling device is installed to cool the cover and the outside of the furnace body to prevent heat from affecting the external environment and interfering with the sealing ring. However, water cooling generally does not directly contact the sealing ring, resulting in poor heat dissipation and cooling effect on the sealing ring. If water directly contacts the sealing ring, the side of the sealing ring in contact with the water cannot be effectively supported, resulting in a poor sealing effect. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a vacuum sintering furnace sealing connection device that enables rapid heat dissipation of the sealing ring and ensures stable pressure on the sealing ring.

[0005] The technical solution of this utility model: A sealing connection device for a vacuum sintering furnace, comprising a furnace body, a cover rotatably mounted on the furnace body, and further comprising:

[0006] A cooling cavity is provided on the cover, and a sealing body is fixedly installed in the cooling cavity. The sealing body is provided with a flow groove that communicates with the cooling cavity.

[0007] The input and output pipes are fixedly installed on the cover and communicate with the cooling chamber;

[0008] The hydraulic balancing component installed on the cover includes a detection cylinder fixedly installed on the cover and communicating with the cooling chamber. A detection plate that moves according to the hydraulic pressure inside the cooling chamber is slidably installed inside the detection cylinder. A valve is fixedly installed on the output pipe. An adjustment component that controls the opening and closing angle of the valve according to the position of the detection plate is installed on the cover.

[0009] Optionally, the valve includes a valve body fixedly mounted on the output pipe and a valve core rotatably mounted inside the valve body, wherein a drive shaft is fixedly mounted on the valve core.

[0010] Optionally, the adjustment assembly includes a connecting rod fixedly mounted on the drive shaft, an adjustment cylinder rotatably mounted on the cover, a drive plate slidably and sealingly connected inside the adjustment cylinder, and the drive plate being fixedly connected to the connecting rod.

[0011] Optionally, both ends of the detection cylinder are fixedly installed with conveying pipes, and the other end of the conveying pipes is fixedly connected to and communicates with both ends of the regulating cylinder. The detection cylinder, regulating cylinder and conveying pipes are all filled with hydraulic medium.

[0012] Optionally, the inner diameter of the adjusting cylinder is smaller than the inner diameter of the detection cylinder.

[0013] Optionally, a pressure rod is fixedly installed on the detection plate, and a spring is fixedly installed between the pressure rod and the detection cylinder.

[0014] Optionally, a partition is fixedly installed inside the cooling chamber, and the input pipe and output pipe are located on both sides of the partition.

[0015] Optionally, the furnace body is provided with a groove corresponding to the sealing body.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] By using a design where the water-cooling device is in direct contact with the sealing body, the reliability and lifespan of the sealing system are significantly improved. The coolant and the sealing body exchange heat efficiently, quickly removing the high-temperature heat load and strictly controlling the sealing interface temperature within the material's tolerance threshold, thus completely avoiding thermal failures such as rubber carbonization and metal creep.

[0018] The circulating coolant forms a continuous hydraulic pressure in the closed flow channel, applying uniform radial pressure to the seal body, compensating for the microscopic separation of the sealing surface caused by thermal expansion or vibration, suppressing "breathing effect" leakage, and the hydraulic support can offset some of the external mechanical stress, maintaining the static clamping force of the sealing interface. Especially under conditions of drastic temperature fluctuations, this design can dynamically balance thermal deformation and prevent sealing failure caused by flange warping. Attached Figure Description

[0019] Figure 1 A schematic diagram of the sealing connection device for a vacuum sintering furnace;

[0020] Figure 2 This is a schematic diagram of the cap structure;

[0021] Figure 3 This is a schematic diagram of the internal structure of the cap;

[0022] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0023] Figure 5 This is a schematic diagram of the partition structure;

[0024] Figure 6 This is a schematic diagram of the hydraulic balancing component.

[0025] Reference numerals: 1. Furnace body; 11. Groove; 2. Cover; 21. Cooling chamber; 22. Input pipe; 23. Output pipe; 24. Baffle plate; 3. Sealing body; 31. Flow channel; 4. Hydraulic balancing component; 41. Detection cylinder; 42. Detection plate; 43. Valve; 431. Valve body; 432. Valve core; 433. Drive shaft; 44. Connecting rod; 45. Adjusting cylinder; 46. Drive plate; 47. Conveying pipe; 48. Pressure rod; 49. Spring. Detailed Implementation

[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1 and Figure 2 As shown, the present invention proposes a vacuum sintering furnace sealing connection device, including a furnace body 1, a cover 2 rotatably mounted on the furnace body 1, a cooling chamber 21 provided on the cover 2, and a sealing body 3 fixedly installed in the cooling chamber 21. Cooling liquid circulates in the cooling chamber 21, and the cover 2 can be cooled by heat exchange through the cooling liquid. The cooling liquid can directly contact the sealing body 3, thereby directly exchanging heat with the sealing body 3, which can effectively improve the heat exchange efficiency of the sealing body 3. The furnace body 1 is provided with a groove 11 corresponding to the sealing body 3. By combining the sealing body 3 with the groove 11, the sealing connection between the cover 2 and the furnace body 1 can be achieved.

[0028] like Figure 1 , Figure 2 and Figure 5As shown, this embodiment also includes an input pipe 22 and an output pipe 23 fixedly installed on the cover 2 and connected to the cooling chamber 21. A water pump inputs coolant into the cooling chamber 21 through the input pipe 22, and the coolant whose temperature rises after heat exchange is extracted through the output pipe 23, and after heat exchange and cooling, it is input back into the cooling chamber 21 for circulation, thus completing the cooling of the cover 2. The sealing body 3 is provided with a flow groove 31 connected to the cooling chamber 21. The flow groove 31 can increase the contact area between the coolant and the sealing body 3, thereby increasing the heat exchange area and effectively increasing the heat exchange effect. A baffle 24 is fixedly installed inside the cooling chamber 21. The input pipe 22 and the output pipe 23 are located on both sides of the baffle 24. The baffle 24 allows the coolant to circulate once inside the cooling chamber 21, ensuring the residence time of the coolant inside the cover 2.

[0029] like Figures 2 to 6 As shown, this embodiment also includes a hydraulic balancing component 4 installed on the cover 2. The hydraulic balancing component 4 includes a detection cylinder 41 fixedly installed on the cover 2 and communicating with the cooling chamber 21. A detection plate 42 is slidably installed inside the detection cylinder 41, which moves according to the hydraulic pressure inside the cooling chamber 21. When the hydraulic pressure inside the cooling chamber 21 increases, the pressure applied to the detection plate 42 will increase, thereby pushing the detection plate 42 to move. A valve 43 is fixedly installed on the output pipe 23. An adjustment component is installed on the cover 2 to control the opening and closing angle of the valve 43 according to the position of the detection plate 42. By controlling the opening and closing of the valve 43, the resistance of the coolant when passing through the output pipe 23 can be controlled. To ensure that the input amount of coolant is equal to the delivery amount per unit time, the resistance that needs to be overcome when the coolant flows out is controlled by controlling the opening and closing of the valve 43. If the resistance is greater, the cooling chamber 21 needs to have a larger hydraulic pressure. Therefore, the hydraulic pressure inside the cooling chamber 21 can be controlled by controlling the size of the valve 43.

[0030] A pressure rod 48 is fixedly installed on the detection plate 42, and a spring 49 is fixedly installed between the pressure rod 48 and the detection cylinder 41. When the hydraulic pressure inside the cooling chamber 21 increases, it will push the detection plate 42 to move, thereby causing the pressure rod 48 to move and stretching the spring 49. When the pressure exerted by the hydraulic pressure inside the cooling chamber 21 on the detection plate 42 is equal to the pressure exerted by the spring 49 on the detection plate 42, the detection plate 42 is stationary. When the pressure inside the cooling chamber 21 decreases, the detection plate 42 will be driven to move in the opposite direction under the pressure of the spring 49.

[0031] The valve 43 includes a valve body 431 fixedly installed on the output pipe 23 and a valve core 432 rotatably installed inside the valve body 431. A drive shaft 433 is fixedly installed on the valve core 432. The valve core 432 can be rotated by rotating the drive shaft 433, and the rotating valve core 432 can control the effective flow area inside the valve body 431.

[0032] Furthermore, the adjustment assembly includes a connecting rod 44 fixedly mounted on the drive shaft 433, an adjustment cylinder 45 rotatably mounted on the cover 2, a drive plate 46 slidably and sealed inside the adjustment cylinder 45, the drive plate 46 being fixedly connected to the connecting rod 44, and a delivery pipe 47 fixedly mounted at both ends of the detection cylinder 41. The other end of the delivery pipe 47 is fixedly connected to and communicates with both ends of the adjustment cylinder 45. The detection cylinder 41, the adjustment cylinder 45, and the delivery pipe 47 are all filled with hydraulic medium, which is a liquid that cannot be compressed under working conditions. When the detection plate 42 moves, the hydraulic medium on one side of the detection cylinder 41 will be input into the adjustment cylinder 45 through the delivery pipe 47, and push the drive plate 46 to move. The moving drive plate 46 will drive the connecting rod 44 to move, thereby driving the drive shaft 433 to rotate. In turn, the movement of the detection plate 42 will drive the rotation of the valve core 432, and thus control the opening and closing of the valve 43 according to the hydraulic pressure inside the cooling chamber 21.

[0033] It is worth noting that the inner diameter of the regulating cylinder 45 is smaller than that of the detection cylinder 41, which makes the drive plate 46 inside the detection cylinder 41 move more sensitively and can adjust the opening and closing size of the valve 43 in a timely manner when there are hydraulic fluctuations inside the cooling chamber 21.

[0034] Working principle: The coolant is pumped into the cooling chamber 21 through the inlet pipe 22 by the water pump, and the coolant whose temperature rises after heat exchange is extracted through the outlet pipe 23, and after heat exchange and cooling, it is fed back into the cooling chamber 21 for circulation, which can complete the cooling of the cover 2. The flow groove 31 can increase the contact area between the coolant and the sealing body 3, thereby increasing the heat exchange area and effectively increasing the heat exchange effect.

[0035] When the hydraulic pressure inside the cooling chamber 21 increases, the pressure applied to the detection plate 42 will also increase, thereby pushing the detection plate 42 to move. When the detection plate 42 moves, it will input the hydraulic medium on one side of the detection cylinder 41 into the regulating cylinder 45 through the delivery pipe 47, and push the drive plate 46 to move. The moving drive plate 46 will drive the connecting rod 44 to move, thereby driving the transmission shaft 433 to rotate. In turn, the movement of the detection plate 42 will drive the rotation of the valve core 432, and thus control the opening and closing of the valve 43 according to the hydraulic pressure inside the cooling chamber 21.

[0036] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A sealing connection device for a vacuum sintering furnace, comprising a furnace body (1) and a cover (2) rotatably mounted on the furnace body (1), characterized in that, Also includes: A cooling cavity (21) is provided on the cover (2), and a sealing body (3) is fixedly installed in the cooling cavity (21). The sealing body (3) is provided with a flow groove (31) that communicates with the cooling cavity (21). An inlet pipe (22) and an outlet pipe (23) are fixedly installed on the cover (2) and connected to the cooling chamber (21); The hydraulic balancing component (4) is installed on the cover (2). The hydraulic balancing component (4) includes a detection cylinder (41) fixedly installed on the cover (2) and communicating with the cooling chamber (21). A detection plate (42) is slidably installed inside the detection cylinder (41) and moves according to the hydraulic pressure inside the cooling chamber (21). A valve (43) is fixedly installed on the output pipe (23). An adjustment component is installed on the cover (2) to control the opening and closing angle of the valve (43) according to the position of the detection plate (42).

2. The vacuum sintering furnace sealing connection device according to claim 1, characterized in that, The valve (43) includes a valve body (431) fixedly installed on the output pipe (23) and a valve core (432) rotatably installed inside the valve body (431). A drive shaft (433) is fixedly installed on the valve core (432).

3. The vacuum sintering furnace sealing connection device according to claim 2, characterized in that, The adjustment assembly includes a connecting rod (44) fixedly mounted on the transmission shaft (433), an adjustment cylinder (45) rotatably mounted on the cover (2), a drive plate (46) slidingly and sealingly connected inside the adjustment cylinder (45), and the drive plate (46) fixedly connected to the connecting rod (44).

4. The vacuum sintering furnace sealing connection device according to claim 3, characterized in that, Both ends of the detection cylinder (41) are fixedly installed with conveying pipes (47), and the other end of the conveying pipes (47) is fixedly connected to and communicates with both ends of the regulating cylinder (45). The detection cylinder (41), the regulating cylinder (45) and the conveying pipes (47) are all filled with hydraulic medium.

5. The vacuum sintering furnace sealing connection device according to claim 4, characterized in that, The inner diameter of the adjusting cylinder (45) is smaller than the inner diameter of the detection cylinder (41).

6. The vacuum sintering furnace sealing connection device according to claim 5, characterized in that, A pressure rod (48) is fixedly installed on the detection plate (42), and a spring (49) is fixedly installed between the pressure rod (48) and the detection cylinder (41).

7. The vacuum sintering furnace sealing connection device according to claim 1, characterized in that, A partition (24) is fixedly installed inside the cooling chamber (21), and the input pipe (22) and output pipe (23) are located on both sides of the partition (24).

8. The vacuum sintering furnace sealing connection device according to claim 1, characterized in that, The furnace body (1) is provided with a groove (11) corresponding to the sealing body (3).

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