Transverse moving type hydraulic drive isolating valve for vacuum induction furnace

Abstract

The invention discloses a traversing hydraulic drive isolating valve for a vacuum induction furnace, which comprises an isolating valve shell, a valve guide vehicle, an isolating valve, a valve traversing device and a clamping and sealing device, a valve port is formed in the isolating valve shell, and a valve seat is welded on the periphery of the valve port; the isolation valve is mounted at the lower end of the valve guide vehicle through a door hanger; the valve transverse moving device adopts a horizontally arranged long-stroke hydraulic cylinder, and the long-stroke hydraulic cylinder is used for driving the isolation valve to horizontally move along the transverse guide rail so as to open or close a valve port; the clamping and sealing device comprises four clamping hydraulic cylinders, a cylinder body of each clamping hydraulic cylinder is fixed to the isolating valve shell, a piston rod of each clamping hydraulic cylinder stretches out and draws back, and the clamping hydraulic cylinders are used for pressing the isolating valve to a valve seat at a valve port. The transverse moving type hydraulic drive isolating valve is simple and compact in structure, large in driving force, good in sealing effect and particularly suitable for the vacuum isolation working condition of a large vacuum induction furnace.

Description

Technical Field

[0001] This invention relates to the field of vacuum metallurgical equipment technology, and specifically to a transverse hydraulically driven isolation valve for a vacuum induction furnace. Background Technology

[0002] Vacuum induction furnaces are crucial equipment for smelting high-temperature alloys and special steels. During the smelting process, large vacuum isolation valves are needed between the melting chamber and the casting or charging chamber to maintain the vacuum level in each chamber or to perform specific operations. These valves require large size, excellent sealing performance, and reliable operation.

[0003] Existing large vacuum isolation valves employ various actuation and sealing methods. Some utilize gate valve structures, opening and closing by lifting the valve plate; however, this structure has a large height dimension, requiring significant installation space. Others employ butterfly valve structures, but the sealing reliability of large-diameter butterfly valves at high temperatures is difficult to guarantee. Furthermore, traditional actuation methods, such as motor-driven screw drives, suffer from low transmission efficiency, slow response, and difficulty in opening and closing under high pressure differentials. If the sealing clamping force is provided by a single actuation mechanism, it often leads to uneven stress on the valve plate, affecting the sealing effect, especially in cases with large valve orifices, which can easily cause leakage.

[0004] Therefore, there is an urgent need for an isolation valve designed for large vacuum induction furnaces that can provide uniform and powerful sealing force, has a simple and compact structure, and operates stably. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a transverse hydraulically driven isolation valve for vacuum induction furnaces. It has a simple and compact structure, large driving force, and good sealing effect, and is particularly suitable for vacuum isolation conditions of large vacuum induction furnaces.

[0006] The technical solution to achieve the above objective is: a transverse hydraulically driven isolation valve for a vacuum induction furnace, comprising an isolation valve housing, a valve guide carriage, an isolation valve, a valve transverse movement device, and a clamping and sealing device, wherein:

[0007] The isolation valve housing has a valve port, and a valve seat is welded around the valve port; a transverse guide rail is provided at the top inside the isolation valve housing.

[0008] The valve guide vehicle is connected to the transverse guide rail via a wheel assembly;

[0009] The isolation valve is installed at the lower end of the valve guide vehicle via a gantry crane;

[0010] The valve lateral movement device uses a horizontally set long-stroke hydraulic cylinder. The cylinder body of the long-stroke hydraulic cylinder is fixedly connected to the outside of the isolation valve housing. The piston rod end of the long-stroke hydraulic cylinder is connected to the valve guide trolley. The long-stroke hydraulic cylinder is used to drive the isolation valve to move horizontally along the transverse guide rail to open or close the valve port.

[0011] The clamping and sealing device includes four clamping hydraulic cylinders, which are distributed around the valve port. The cylinder body of each clamping hydraulic cylinder is fixed to the isolation valve housing, and the piston rod of each clamping hydraulic cylinder extends and retracts. The clamping hydraulic cylinder is used to press the isolation valve against the valve seat at the valve port.

[0012] The above-mentioned transverse hydraulically driven isolation valve for a vacuum induction furnace, wherein the four clamping hydraulic cylinders are symmetrically arranged at the four corners with the valve port as the center.

[0013] The aforementioned transverse hydraulically driven isolation valve for a vacuum induction furnace includes a piston rod connector installed at the end of the piston rod of each clamping hydraulic cylinder. Pressure blocks are welded to the four corners of the front side of the isolation valve. When the isolation valve is driven to the closed valve port by the long-stroke hydraulic cylinder, the piston rod connectors of the four clamping hydraulic cylinders act on the four pressure blocks one by one, pressing the isolation valve against the valve seat at the valve port.

[0014] The above-mentioned transverse hydraulically driven isolation valve for a vacuum induction furnace has a sealing strip embedded on its sealing surface, and the sealing surface of the valve seat is a smooth metal sealing surface that mates with the sealing strip.

[0015] In the aforementioned transverse hydraulically driven isolation valve for a vacuum induction furnace, the cylinder body of the long-stroke hydraulic cylinder is located at the top of the outer side of the isolation valve housing, and the tail of the cylinder body is supported by screws to ensure its horizontal placement.

[0016] In the aforementioned transverse hydraulically driven isolation valve for a vacuum induction furnace, the end of the piston rod of the long-stroke hydraulic cylinder is connected to the valve guide vehicle via a spherical bearing and a pin.

[0017] The aforementioned transverse hydraulically driven isolation valve for a vacuum induction furnace, wherein the long-stroke hydraulic cylinder and the clamping hydraulic cylinder are both double-acting hydraulic cylinders.

[0018] The advantages of the transverse hydraulically driven isolation valve for vacuum induction furnace of the present invention are:

[0019] (1) Separation of drive and sealing, performance optimization: Long-stroke hydraulic cylinders are used to control the lateral movement of the isolation valve, which is powerful; four small hydraulic cylinders are used to press the seal evenly from the four corners, which is uniform in force and has a good sealing effect, solving the problem of uneven sealing force of large-diameter valves.

[0020] (2) Simple and compact structure with good stability: Compared with the lifting structure, the horizontal moving structure reduces the total height of the equipment and saves installation space. The setting of the guide mechanism ensures that the valve plate runs smoothly without jamming.

[0021] (3) High reliability and suitable for harsh working conditions: The hydraulic drive has overload protection capability and good impact resistance, making it particularly suitable for the high temperature and vibration environment that may exist near the vacuum furnace. All hydraulic cylinders can be controlled by the same hydraulic station, resulting in high system integration and high degree of automation;

[0022] (4) Particularly suitable for large equipment: This design is particularly suitable for large-size isolation valves of large vacuum induction furnaces, and the huge and uniform sealing force it provides can effectively ensure the maintenance of high vacuum. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the transverse hydraulically driven isolation valve of the present invention in the open state;

[0024] Figure 2 This is a side view of the transverse hydraulically driven isolation valve of the present invention (with the isolation valve housing side plate hidden);

[0025] Figure 3 A partially enlarged view of the clamping hydraulic cylinder;

[0026] Figure 4 This is a partial magnified view of the sealing strip of the isolation valve. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of the present invention, its specific embodiments are described in detail below with reference to the accompanying drawings:

[0028] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 According to the preferred embodiment of the present invention, a transverse hydraulically driven isolation valve for a vacuum induction furnace includes an isolation valve housing 1, a valve guide trolley 3, an isolation valve 2, a valve transverse movement device 4, and a clamping and sealing device 5.

[0029] The isolation valve housing 1 is a welded frame structure with a valve port 13 on the right side and a valve seat 12 welded around the valve port 13. A transverse guide rail 11 is provided on the upper part of the interior of the isolation valve housing, and the valve guide trolley 3 is connected to the transverse guide rail 11 through a wheel assembly 31.

[0030] The isolation valve 2 is a welded, closed structure with internal cooling water flow. Two types of round steel bars 23 (with different diameters) are welded to the sealing surface of the isolation valve 2 for embedding a high-temperature resistant sealing strip 22. The isolation valve 2 is installed at the lower end of the valve guide carriage 3 via a gantry hanger 32.

[0031] The transverse guide rail 11 and the valve guide carriage 3 form a guiding mechanism to ensure that the isolation valve 2 can only move laterally in the horizontal direction along the transverse guide rail 11.

[0032] The valve lateral movement device 4 employs a horizontally positioned long-stroke hydraulic cylinder. The cylinder body of the long-stroke hydraulic cylinder is fixedly connected to the outside of the isolation valve housing 1. The piston rod end of the long-stroke hydraulic cylinder 4 is connected to the valve guide carriage 3. The long-stroke hydraulic cylinder is used to drive the isolation valve 2 to move horizontally along the transverse guide rail 11 to open or close the valve port 13. Specifically, the cylinder body of the long-stroke hydraulic cylinder 4 is located at the top of the outside of the isolation valve housing 1, and the tail of the cylinder body is supported by screws to ensure its horizontal placement. The piston rod end of the long-stroke hydraulic cylinder 4 is connected to the valve guide carriage 3 through a spherical bearing 41 and a pin 42. The long-stroke hydraulic cylinder 4 drives the valve guide carriage 3 to move horizontally, thereby driving the isolation valve 2 to move horizontally.

[0033] The clamping sealing device 5 includes four clamping hydraulic cylinders 51, which are distributed around the valve port. The cylinder body of each clamping hydraulic cylinder 51 is fixed to the isolation valve housing 1. The piston rod of each clamping hydraulic cylinder 51 extends and retracts, and the direction of movement of the piston rod of the clamping hydraulic cylinder 51 is perpendicular to the direction of movement of the piston rod of the long-stroke hydraulic cylinder 4. The clamping hydraulic cylinders 51 are used to press the isolation valve 2 against the valve seat 12 at the valve port.

[0034] Specifically, four clamping hydraulic cylinders 51 are symmetrically arranged at the four corners with the valve port 13 as the center. Each clamping hydraulic cylinder 51 has a piston rod connector 52 installed at the end of its piston rod. Pressure blocks 21 are welded to the four corners of the front side of the isolation valve 2. When the isolation valve 2 is driven to close the valve port 13 by the long-stroke hydraulic cylinder, the piston rod connectors 52 of the four clamping hydraulic cylinders 51 act on the four pressure blocks 21 in a corresponding manner, pressing the isolation valve 2 against the valve seat 12 at the valve port 13.

[0035] A sealing strip 22 is embedded on the sealing surface of the isolation valve 2, and the sealing surface of the valve seat 12 adopts a smooth metal sealing surface that matches the sealing strip 22. In this way, when the isolation valve 2 is pressed against the valve seat 12 at the valve port 13, a metal-rubber composite sealing structure is formed.

[0036] The long-stroke hydraulic cylinder and the clamping hydraulic cylinder 51 are both double-acting hydraulic cylinders.

[0037] The transverse hydraulically driven isolation valve for a vacuum induction furnace of the present invention, with its long-stroke hydraulic cylinder and clamping hydraulic cylinder 51 externally connected to a controller, operates as follows:

[0038] Closing the isolation valve: The controller first instructs the long-stroke hydraulic cylinder of the valve lateral movement device 4 to move, pushing the isolation valve 2 from one side to the closed position of the valve port. Then, the controller instructs the four clamping hydraulic cylinders 51 of the clamping sealing device 5 to extend simultaneously, and their piston rod connectors 52 press against the pressure block 21 on the isolation valve 2, thereby evenly pressing the isolation valve 2 and its sealing strip 22 onto the valve seat 12 to form a reliable seal.

[0039] Opening the isolation valve: The process is reversed. First, the controller commands the four clamping hydraulic cylinders 51 to retract simultaneously, releasing the clamping force on the isolation valve 2. Then, the long-stroke hydraulic cylinder of the valve lateral movement device 4 moves in the opposite direction, pulling the isolation valve 2 back from the valve port position to one side, fully opening the passage.

[0040] This invention relates to a horizontally sliding hydraulically driven isolation valve for vacuum induction furnaces. The drive and sealing are separated, and a long-stroke hydraulic cylinder is used specifically for the horizontal sliding opening and closing of the isolation valve, providing strong power. Four small clamping hydraulic cylinders evenly press the seal from four corners, ensuring uniform force and excellent sealing performance. Compared to traditional lifting structures, the horizontal sliding structure reduces the overall height of the equipment, saving installation space. The transverse guide rail and valve guide carriage form a guiding mechanism, ensuring smooth and jam-free operation of the isolation valve. The hydraulic drive has overload protection and good impact resistance, making it particularly suitable for the high-temperature and vibration environments that may exist near vacuum furnaces. All hydraulic cylinders can be controlled by the same hydraulic station, resulting in high system integration and automation. It is especially suitable for large-size isolation valves in large vacuum induction furnaces, providing a large and uniform sealing force that effectively ensures the maintenance of high vacuum levels.

[0041] In summary, the transverse hydraulically driven isolation valve for vacuum induction furnaces of the present invention has a simple and compact structure, large driving force, and good sealing effect, and is particularly suitable for vacuum isolation conditions of large vacuum induction furnaces.

[0042] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A transverse hydraulically driven isolation valve for a vacuum induction furnace, characterized in that, Includes a valve housing, a valve guide carriage, a valve isolation valve, a valve lateral movement device, and a clamping and sealing device, wherein: The isolation valve housing has a valve port, and a valve seat is welded around the valve port; a transverse guide rail is provided at the top inside the isolation valve housing. The valve guide vehicle is connected to the transverse guide rail via a wheel assembly; The isolation valve is installed at the lower end of the valve guide vehicle via a gantry crane; The valve lateral movement device uses a horizontally set long-stroke hydraulic cylinder. The cylinder body of the long-stroke hydraulic cylinder is fixedly connected to the outside of the isolation valve housing. The piston rod end of the long-stroke hydraulic cylinder is connected to the valve guide trolley. The long-stroke hydraulic cylinder is used to drive the isolation valve to move horizontally along the transverse guide rail to open or close the valve port. The clamping and sealing device includes four clamping hydraulic cylinders, which are distributed around the valve port. The cylinder body of each clamping hydraulic cylinder is fixed to the isolation valve housing, and the piston rod of each clamping hydraulic cylinder extends and retracts. The clamping hydraulic cylinder is used to press the isolation valve against the valve seat at the valve port.

2. The transverse hydraulically driven isolation valve for a vacuum induction furnace according to claim 1, characterized in that, The four clamping hydraulic cylinders are symmetrically arranged at the four corners with the valve port as the center.

3. A transverse hydraulically driven isolation valve for a vacuum induction furnace according to claim 1 or 2, characterized in that, Each clamping hydraulic cylinder has a piston rod connector installed at the end of its piston rod. Pressure blocks are welded to the four corners of the front side of the isolation valve. When the isolation valve is driven to the closed valve port by the long-stroke hydraulic cylinder, the piston rod connectors of the four clamping hydraulic cylinders act on the four pressure blocks one by one, pressing the isolation valve against the valve seat at the valve port.

4. A transverse hydraulically driven isolation valve for a vacuum induction furnace according to claim 1, characterized in that, The sealing surface of the isolation valve is embedded with a sealing strip, and the sealing surface of the valve seat is a smooth metal sealing surface that cooperates with the sealing strip.

5. A transverse hydraulically driven isolation valve for a vacuum induction furnace according to claim 1, characterized in that, The cylinder body of the long-stroke hydraulic cylinder is located at the top of the outer side of the isolation valve housing, and the tail of the cylinder body is supported by screws to ensure that it is placed horizontally.

6. A transverse hydraulically driven isolation valve for a vacuum induction furnace according to claim 1, characterized in that, The end of the piston rod of the long-stroke hydraulic cylinder is connected to the valve guide vehicle via a spherical bearing and a pin.

7. A transverse hydraulically driven isolation valve for a vacuum induction furnace according to claim 1, characterized in that, The long-stroke hydraulic cylinder and the clamping hydraulic cylinder are both double-acting hydraulic cylinders.

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