A pressure blocking device

Abstract

The utility model relates to the technical field of electric smelting furnace relates to a pressure blocking device, include: rotation axis, blocking cavity and magnetic fluid, the blocking cavity includes upper cavity and lower cavity, is provided with the chute in the blocking cavity inside and is provided with air inlet and outlet passage one and air inlet and outlet passage two in two ends respectively, the chute upper and lower two ends are penetrated with air inlet and outlet passage one and air inlet and outlet passage two setting respectively, air inlet and outlet passage one sets up in upper cavity, air inlet and outlet passage two sets up in lower cavity, the rotation axis side end in the blocking cavity is obliquely provided with sealing end face no.

Description

Technical Field

[0001] This utility model relates to the field of electric furnace technology, and specifically to a pressure blocking device. Background Technology

[0002] Electric melting furnaces are devices used to mass-produce high-purity quartz glass materials through high-pressure vacuum electrofusion. Due to the casting process requirements, lifting and rotation functions within the furnace are necessary under high-pressure vacuum conditions. To simultaneously meet the requirements of high pressure and vacuum, existing equipment typically employs magnetohydrodynamic (MHD) technology to achieve these functions. However, while MHD can meet vacuum requirements, it is not resistant to high pressure. During use, the stability of MHD changes under high-pressure environments, leading to unstable equipment operation. Utility Model Content

[0003] This invention provides a pressure blocking device to address the problems of the prior art.

[0004] The objective of this utility model can be achieved through the following technical solution: A pressure blocking device, comprising: a rotating shaft, a blocking cavity disposed on the rotating shaft, and a magnetohydrodynamic fluid disposed at the lower end of the blocking cavity. The blocking cavity includes an upper cavity and a lower cavity. A sliding groove is provided inside the blocking cavity, and an air inlet / outlet channel one and an air inlet / outlet channel two are respectively provided at the upper and lower ends. The upper and lower ends of the sliding groove are respectively connected to the air inlet / outlet channel one and the air inlet / outlet channel two. The air inlet / outlet channel one is disposed in the upper cavity, and the air inlet / outlet channel two is disposed in the lower cavity. A sealing end face one is inclinedly disposed on the side end of the rotating shaft located in the blocking cavity. A piston is slidably disposed in the sliding groove, and a sealing end face two is inclinedly disposed on the side end of the piston. The sealing end face one and the sealing end face two are correspondingly disposed.

[0005] In a further improvement, an intake and exhaust module is provided on the outer side of both the intake and exhaust channels one and the intake and exhaust channels two. The intake and exhaust module includes a three-way valve connected to the intake and exhaust channels one or the intake and exhaust channels two, an intake pipe connected to the three-way valve, and an exhaust pipe. A solenoid valve is provided at the end of both the intake pipe and the exhaust pipe.

[0006] As a further improvement, multiple sets of sealing rings are provided inside the blocking cavity and on the piston.

[0007] As a further improvement, a dust cover is provided on the upper end of the rotating shaft and the blocking cavity.

[0008] As a further improvement, a sensor is installed in the middle of the blocking cavity.

[0009] Compared with the prior art, the present invention has the following advantages: the present invention can simultaneously meet the requirements of equipment use in high pressure environment and vacuum environment, and ensure the stable operation and performance of equipment under different working conditions. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a cross-sectional view of the present invention;

[0012] Figure 3 This is a cross-sectional view of the present invention during sealing;

[0013] Figure 4 This is a schematic diagram of the intake and exhaust module of this utility model.

[0014] In the diagram, 1. Rotating shaft; 11. Sealing end face one; 2. Blocking cavity; 21. Upper cavity; 22. Lower cavity; 3. Magnetofluid; 41. Slide groove; 42. Inlet / outlet channel one; 43. Inlet / outlet channel two; 5. Piston; 51. Sealing end face two; 6. Inlet / outlet module; 61. Three-way valve; 62. Inlet pipe; 63. Outlet pipe; 64. Solenoid valve; 71. Sealing ring; 72. Dust cover; 73. Sensor. Detailed Implementation

[0015] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] The following is a description of the embodiments and appendices. Figures 1-4 The technical solution of this utility model will be further described below.

[0018] Example 1

[0019] A pressure blocking device includes: a rotating shaft 1, a blocking cavity 2 disposed on the rotating shaft 1, and a magnetofluid 3 disposed at the lower end of the blocking cavity 2. The blocking cavity 2 includes an upper cavity 21 and a lower cavity 22. A sliding groove 41 is provided inside the blocking cavity 2, and an inlet / outlet channel 42 and an inlet / outlet channel 43 are respectively provided at the upper and lower ends. The upper and lower ends of the sliding groove 41 are respectively connected to the inlet / outlet channel 42 and the inlet / outlet channel 43. The inlet / outlet channel 42 is disposed in the upper cavity 21, and the inlet / outlet channel 43 is disposed in the lower cavity 22. A sealing end face 11 is inclinedly disposed on the side end of the rotating shaft 1 located in the blocking cavity 2. A piston 5 is slidably disposed in the sliding groove 41, and a sealing end face 51 is inclinedly disposed on the side end of the piston 5. The sealing end face 11 and the sealing end face 51 are correspondingly disposed.

[0020] like Figures 1-4 As shown, in actual use, when the device is in a vacuum environment, gas enters through the inlet / outlet channel 43, pushing the piston 5 upward in the slide groove 41 until it contacts the upper cavity 21. At this time, the sealing end face 51 of the piston 5 separates from the sealing end face 11 of the rotating shaft 1, and the rotating shaft 1 can then rotate normally and begin operation.

[0021] When the device is under pressure, gas enters through the inlet / outlet channel 42, pushing the piston 5 downwards within the slide groove 41. At this time, the sealing end face 51 of the piston 5 is tightly fitted with the sealing end face 11 of the rotating shaft 1. Under pressure, the inclined sealing end face is pressed tighter and tighter, effectively preventing pressure transmission to the lower cavity 22 and avoiding pressure affecting the magnetofluid 3 within the lower cavity 22. This allows the device to simultaneously meet the requirements of both high-pressure and vacuum environments, ensuring stable operation and performance under different working conditions.

[0022] As a further preferred embodiment, an intake and exhaust module 6 is provided on the outside of both the first intake and exhaust channel 42 and the second intake and exhaust channel 43. The intake and exhaust module 6 includes a three-way valve 61 connected to the first intake and exhaust channel 42 or the second intake and exhaust channel 43, an intake pipe 62 connected to the three-way valve 61, and an exhaust pipe 63. A solenoid valve 64 is provided at the end of both the intake pipe 62 and the exhaust pipe 63.

[0023] Specifically:

[0024] When the pressure-blocking device is in a vacuum environment and needs to operate, a signal from the external control system switches the three-way valve 61, which is connected to the second inlet / outlet channel 43, to a state where the inlet pipe 62 communicates with the second inlet / outlet channel 43. Simultaneously, the solenoid valve 64 at the end of the inlet pipe 62 opens. Gas flows through the inlet pipe 62, passes through the three-way valve 61, and enters the second inlet / outlet channel 43, pushing the piston 5 upwards within the slide groove 41 until the piston 5 abuts against the upper cavity 21. At this point, the sealing end face 51 of the piston 5 separates from the sealing end face 11 of the rotating shaft 1, allowing the rotating shaft 1 to rotate normally. During this process, the solenoid valve 64 at the end of the outlet pipe 63 remains closed to prevent gas leakage from the outlet pipe 63.

[0025] When the device is under pressure and pressure needs to be blocked, the external control system sends a signal to switch the three-way valve 61 connected to the inlet / outlet channel 42 to the state where the inlet pipe 62 is connected to the inlet / outlet channel 42, and opens the solenoid valve 64 at the end of the inlet pipe 62. Gas enters the inlet / outlet channel 42 through the inlet pipe 62 and the three-way valve 61, pushing the piston 5 to move down in the slide groove 41, so that the sealing end face 51 of the piston 5 is tightly fitted with the sealing end face 11 of the rotating shaft 1. Under pressure, the inclined sealing end face is pressed tighter and tighter, effectively preventing pressure from being transmitted to the lower cavity 22 and protecting the magnetofluid 3 in the lower cavity 22 from pressure. At this time, the solenoid valve 64 at the end of the outlet pipe 63 remains closed.

[0026] When it is necessary to release the internal pressure of the device, such as when switching from a pressurized environment to another state or after completing a task, the external control system sends a signal to switch the three-way valve 61 to a state where the inlet / outlet channel 1 42 or the inlet / outlet channel 2 43 is connected to the outlet pipe 63 (determined according to the current gas channel). Simultaneously, the solenoid valve 64 at the end of the outlet pipe 63 opens. The gas inside the device is discharged through the inlet / outlet channel 1 42 or the inlet / outlet channel 2 43, via the three-way valve 61 and the outlet pipe 63, achieving pressure release and ensuring that the device operates within a safe pressure range. The solenoid valve 64 at the end of the inlet pipe 62 remains closed during this process to prevent gas leakage from the inlet pipe 62.

[0027] By setting inlet and outlet modules 6 on the outside of inlet and outlet channels 1 42 and 2 43, precise control of gas flow is achieved, enabling the pressure blocking device to better adapt to the working requirements under different gas pressure environments, improving the reliability and safety of the device, and providing a strong guarantee for the stable operation of the equipment.

[0028] As a further preferred embodiment, multiple sets of sealing rings 71 are provided inside the blocking cavity 2 and on the piston 5.

[0029] Specifically, multiple sets of sealing rings 71 are provided on the inner wall of the blocking cavity 2 along the contact area with the piston 5. This not only effectively prevents gas leakage in the gap between the inner wall of the blocking cavity 2 and the side of the piston 5, but also buffers the collision and friction between the piston 5 and the inner wall of the blocking cavity 2 during movement, thus extending the service life of the device.

[0030] Similarly, on the outer circumferential surface of the piston 5, along the contact area with the blocking cavity 2, a sealing ring 71 is provided. This ring cooperates with the sealing ring 71 on the inner wall of the blocking cavity 2, further enhancing the sealing effect. This ensures that the piston 5 can always maintain a tight fit when it moves, preventing gas from escaping in the gap between the piston 5 and the blocking cavity 2, thereby maintaining the stability of the internal pressure of the device.

[0031] As a further preferred embodiment, a dust cover 72 is provided on the upper end of the rotating shaft 1 and the blocking cavity 2.

[0032] As a further preferred embodiment, a sensor 73 is provided in the middle of the blocking cavity 2.

[0033] Specifically, the dust cover 72 can effectively block dust, particulate matter and other impurities in the air from entering the blocking cavity 2, and prevent impurities from adhering to key components such as the piston 5, sealing ring 71 and the inner wall of the blocking cavity 2, thereby ensuring the cleanliness of the device and maintaining good fit and sealing performance between the components.

[0034] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A pressure-blocking device, characterized in that, include: The system comprises a rotating shaft, a blocking cavity mounted on the rotating shaft, and a magnetofluid disposed at the lower end of the blocking cavity. The blocking cavity includes an upper cavity and a lower cavity. The blocking cavity has a sliding groove inside and an inlet / outlet channel one and an inlet / outlet channel two are respectively provided at its upper and lower ends. The upper and lower ends of the sliding groove are respectively connected to the inlet / outlet channel one and the inlet / outlet channel two. The inlet / outlet channel one is disposed in the upper cavity, and the inlet / outlet channel two is disposed in the lower cavity. A sealing end face one is inclinedly disposed on the side end of the rotating shaft located in the blocking cavity. A piston is slidably disposed in the sliding groove, and a sealing end face two is inclinedly disposed on the side end of the piston. The sealing end face one and the sealing end face two are correspondingly disposed.

2. The pressure blocking device according to claim 1, characterized in that, Both the first and second air inlet / outlet channels are equipped with air inlet / outlet modules. Each air inlet / outlet module includes a three-way valve connected to the first or second air inlet / outlet channel, an air inlet pipe connected to the three-way valve, and an air outlet pipe. Both the air inlet pipe and the air outlet pipe are equipped with solenoid valves at their ends.

3. The pressure blocking device according to claim 1, characterized in that, Multiple sets of sealing rings are provided inside the blocking cavity and on the piston.

4. The pressure blocking device according to claim 1, characterized in that, The rotating shaft and the upper end of the blocking cavity are provided with dust covers.

5. A pressure-blocking device according to claim 1, characterized in that, A sensor is installed in the middle of the blocking cavity.

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