Novel injection valve for injection beam

Abstract

The invention provides a novel injection valve for an injection beam. The novel injection valve is provided with a nozzle valve block fixed to a beam body of the injection beam. Two nozzle assemblies which are arranged up and down are fixed on the nozzle valve block; the nozzle valve block is provided with an upper oil channel and a lower oil channel. Each oil channel comprises an oil inlet channel and an oil outlet channel. Two valve cores are arranged in the nozzle valve block; the two valve elements are supported in the nozzle valve block through rotating shafts and arranged in a mirror image mode along the center line of the valve block. The valve element is of a semi-cylindrical structure, an oil groove communicated with the oil inlet channel and the oil outlet channel is formed in the cylindrical face of the semi-cylindrical structure, and the axis of the oil groove is perpendicular to the axis of the oil inlet channel and the axis of the oil outlet channel. A boss protruding outwards is arranged on the non-cylindrical face of the valve element of the semi-cylindrical structure, and a permanent magnet is embedded in the boss. Electromagnets are mounted on the left side and the right side of the boss respectively. According to the invention, the opening and closing force of the force valve is reduced to the greatest extent, so that the direct driving of the electromagnet is safely and reliably realized in a high-frequency and low-loss manner.

Description

Technical Field

[0001] This invention relates to the field of metal rolling processing technology, specifically to a novel jet valve for jet beams. Background Technology

[0002] Currently, the injection valves widely used in nozzle beams are pulse reciprocating plug-type valves. The switching force of the valve body mechanism and the liquid pressure are in the same direction and are mutually reactive forces. The greater the liquid pressure, the greater the switching driving force. This means that if the opening and closing is driven by the magnetic force of the electromagnet directly overcoming the liquid pressure, a lot of power is required, resulting in a large valve body size and power consumption. This makes it impossible to achieve miniaturization and is also prone to fire due to poor heat dissipation.

[0003] Therefore, electromagnet-driven switching control valves on the market all use an electromagnet to first drive a small valve core to open and close (i.e., a pilot valve core), so that a pressure difference is formed between the two opposite chambers of the main piston in the valve body. Then, the main piston is driven to open and close through this pressure difference to realize the valve body switching control. This design does achieve miniaturization and reduce power consumption, but at the same time, it brings the defect of low valve core switching speed (low switching frequency). Summary of the Invention

[0004] The purpose of this invention is to propose a novel injection valve for injection beams. By changing the direction of the valve opening and closing force to be perpendicular to the direction of the liquid pressure, the valve opening and closing force decreases exponentially (the friction coefficient of the composite material bearing is only about 0.02, and with the long active lever arm, the opening and closing force is about a few thousandths of the liquid pressure). This achieves the maximum reduction of the valve opening and closing force, thereby enabling safe, reliable, high-frequency, and low-loss direct electromagnet drive.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A novel injection valve for a spray beam is disclosed. The novel injection valve has a nozzle valve block fixed on the spray beam body; two nozzle assemblies are fixed on the nozzle valve block, arranged vertically; the nozzle valve block has two sets of oil passages, one upper and one lower; each set of oil passages includes an oil inlet channel and an oil outlet channel; one end of the oil inlet channel is connected to the spray beam furnace body, and the other end is connected to the valve core through an oil hole I arranged perpendicular to the oil inlet channel; one end of the oil outlet channel is connected to the valve core through an oil hole II arranged perpendicular to the oil inlet channel, and the other end is connected to the corresponding nozzle assembly. The nozzle valve block contains two valve cores, one above the other. Each valve core corresponds to one nozzle assembly. The two valve cores are supported within the nozzle valve block by their respective rotating shafts and are mirror-image positioned along the centerline of the valve block. The valve cores swing at a certain angle with their corresponding rotating shafts, forming a swing valve core and realizing the opening and closing action of the injection valve. The valve cores are semi-cylindrical structures. The cylindrical surface of the semi-cylindrical valve core has an oil groove connecting the oil inlet and outlet channels after the valve core swings to a fixed small angle. The axis of the oil groove is perpendicular to the axes of the oil inlet and outlet channels. When the oil groove aligns with oil holes I and II, it is in the open state; when the oil groove is offset from oil holes I and II, it is in the closed state. The non-cylindrical surface of the semi-cylindrical valve body has outwardly protruding bosses, each containing a permanent magnet. Electromagnets are installed on the left and right sides of the bosses. The two electromagnets directly drive the valve cores to swing. The bosses of the two valve cores are positioned opposite each other.

[0006] The opening and closing action of the injection valve is driven by the alternating magnetic field of the electromagnets distributed on both sides of the permanent magnet embedded in the valve core.

[0007] The valve core has a permanent magnet embedded in its boss, so that one side of the boss is the S pole and the other side is the N pole. Assuming that the side of the valve core boss closer to the nozzle beam is the S pole, then the side closer to the nozzle assembly is the N pole. When the inner sides of the two electromagnets that form a clamp-like enclosure on both sides of the valve core boss are both S poles, the valve core rotates counterclockwise by a fixed small angle because the left magnetic pole of the boss repels and the right magnetic pole attracts, thereby bringing the oil groove on the top cylindrical surface of the valve core closer to and aligning with the oil holes I and II in the valve block, thus opening the oil passage. Conversely, when both electromagnets have N poles on their inner sides, the valve core's boss rotates clockwise by a fixed small angle due to the attraction between the left and right magnetic poles and the repulsion between the right and left magnetic poles. This causes the oil groove on the top cylindrical surface of the valve core to move away from and completely offset from the oil holes I and II in the valve block, thereby closing the oil circuit.

[0008] The liquid pressure on the valve core is radial, and the opening and closing force of the valve core is radial tangential force.

[0009] The purpose of this invention is to propose a novel injection valve for injection beams. By adopting the above-mentioned technical solution, the direction of the valve opening and closing force is changed to be perpendicular to the direction of the liquid pressure, thereby causing the valve opening and closing force to decrease exponentially (the friction coefficient of the composite material bearing is only about 0.02, and with the length of the active force arm, the opening and closing force is about a few thousandths of the liquid pressure). This achieves the maximum reduction of the valve opening and closing force, thus enabling safe, reliable, high-frequency, and low-loss direct electromagnet drive.

[0010] This invention employs a rotating opening and closing structure with a small rotation angle and a simple structure, which can easily achieve high-frequency opening and closing.

[0011] The valve core cavity of the valve core and valve body adopts a circular arc surface design, which is simple to process and the contact surface can easily achieve high machining accuracy. Therefore, a seal-free design can be adopted, and the mechanism of complete mechanical seal can avoid wear leakage.

[0012] Depending on production needs, more than two nozzle assemblies and corresponding valve cores can be installed on the nozzle valve block. Attached Figure Description

[0013] Figure 1 This is a three-dimensional sectional view of the present invention.

[0014] Figure 2 This is a schematic diagram of the structure of the present invention with a partial valve cover.

[0015] Figure 3 Diagram showing the open state of the injection valve; Figure 4 Diagram showing the injection valve in closed state; Figure 5 This is a diagram showing the relationship between the permanent magnet and the electromagnet in the injection valve.

[0016] In the diagram: 1. Injection beam body, 2. Nozzle valve block, 2.1. Oil inlet channel, 2.2. Oil outlet channel, 2.3. Oil hole I, 2.4. Oil hole II, 3. Nozzle assembly, 4. Valve core, 4.1. Protrusion, 4.2. Oil groove, 5. Rotating shaft, 6. Permanent magnet, 7. Electromagnet, 8. Bearing, 9. Support plate, 10. Valve cover. Detailed Implementation

[0017] The technical solutions in the embodiments of this patent will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this patent, and not all of them. Based on the listed embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this patent application.

[0018] like Figure 1 , Figure 2As shown, a novel injection valve for a spray beam is disclosed. The novel injection valve has a nozzle valve block 2 fixed on the spray beam body 1. Two nozzle assemblies 3 are fixed on the nozzle valve block 2, arranged vertically. The nozzle valve block 2 has two sets of oil passages, one above the other. Each set of oil passages includes an oil inlet channel 2.1 and an oil outlet channel 2.2. One end of the oil inlet channel 2.1 is connected to the spray beam body 1, and the other end is connected to an oil hole I 2.3 on the nozzle valve block. The axis of the oil hole I 2.3 on the nozzle valve block is perpendicular to the axis of the oil inlet channel 2.1. One end of the oil outlet channel 2.2 is connected to the corresponding nozzle assembly 3, and the other end is connected to an oil hole II 2.4 on the nozzle valve block. The axis of the oil hole II 2.4 on the nozzle valve block is perpendicular to the axis of the oil inlet channel 2.2. The oil holes I 2.3 and II 2.4 are arranged side by side and independently. The oil inlet channel 2.1 and the oil outlet channel 2.2 are arranged in a staggered parallel manner.

[0019] The nozzle valve block 2 is provided with a valve core 4; there are two valve cores 4 arranged vertically; the two valve cores 4 correspond to two nozzle assemblies 3 respectively; the two valve cores 4 are supported in the nozzle valve block 2 by corresponding rotating shafts 5, and the valve cores 4 can swing at a certain angle with the corresponding rotating shafts 5 to form a swing valve core and realize the opening and closing action of the injection valve; the valve core is an inverted semi-cylindrical structure; the cylindrical surface of the semi-cylindrical valve core has an oil groove 4-2 for connecting the oil inlet channel and the oil outlet channel, the axis of the oil groove is perpendicular to the axis of the oil inlet channel and the axis of the oil outlet channel, and when the oil groove 4-2 is aligned with the oil hole I 2.3 and the oil hole II 2.4, it is in the open state (e.g. Figure 3 As shown), when the oil tank 4.2 is offset from oil holes I 2.3 and II 2.4, it is in the closed state (as shown). Figure 4 As shown); refer to Figure 5 The semi-cylindrical valve body has an outwardly protruding boss 4-1 on its non-cylindrical surface, and a permanent magnet 6 is embedded in the boss 4-1; an electromagnet 7 is installed on the left and right sides of the boss; the two electromagnets 7 directly drive the valve core to swing; the bosses of the two valve cores are arranged opposite each other.

[0020] The opening and closing action of the injection valve is driven by the alternating magnetic force of the electromagnets 7 distributed on both sides of the permanent magnet 6 embedded in the valve core.

[0021] The valve core has a permanent magnet embedded in its boss, so that one side of the boss is the S pole and the other side is the N pole. Assuming that the side of the valve core boss closer to the nozzle beam is the S pole, then the side closer to the nozzle assembly is the N pole. Combination Figure 3When the inner sides of the two electromagnets that form a pincer-like enclosure on both sides of the boss, that is, the side of the two electromagnets facing the permanent magnet are both S poles, the valve core rotates counterclockwise by a fixed small angle because the left magnetic pole of the boss repels and the right magnetic pole attracts. This causes the oil groove on the top cylindrical surface of the valve core to come close to and align with the oil hole I and oil hole II in the valve block, thus opening the oil passage. Conversely, combination Figure 4 When both electromagnets have N poles on their inner sides, the valve core's boss rotates clockwise by a fixed small angle due to the attraction between the left and right magnetic poles and the repulsion between the right and left magnetic poles. This causes the oil groove on the top cylindrical surface of the valve core to move away from and completely offset from the oil holes I and II in the valve block, thereby closing the oil circuit.

[0022] The nozzle valve block is a hollow structure with an opening on one side, and a valve cover 10 is installed on the opening on one side; one end of the rotating shaft 5 is equipped with the bearing 8 and inserted into the nozzle valve block 2, and the other end is also equipped with the bearing 8 and inserted into the inner hole of the support plate 9.

[0023] The liquid pressure on the valve core is radial, and the opening and closing force of the valve core is radial tangential force.

[0024] The valve core 4 is connected to the rotating shaft 5 by a key or interference fit.

[0025] By simultaneously changing the current flow direction of the electromagnet 7 to change its polarity, the valve core 7 is driven to swing along the rotating shaft 5.

[0026] The nozzle valve block 2 may have a sealing groove, and a sealing ring is provided between the valve cover 10 and the nozzle valve block 2 for sealing.

[0027] The parts of this patent application not detailed herein are prior art; although embodiments of this patent have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this patent, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel injection valve for injection beams, characterized in that: The novel injection valve has a nozzle valve block fixed on the injection beam body; two nozzle assemblies are fixed on the nozzle valve block, arranged vertically; the nozzle valve block has two sets of oil passages, each set of oil passages including an oil inlet channel and an oil outlet channel, one end of the oil inlet channel is connected to the injection beam furnace body, and the other end is connected to the valve core through an oil hole I arranged perpendicular to the oil inlet channel; one end of the oil outlet channel is connected to the valve core through an oil hole II arranged perpendicular to the oil inlet channel, and the other end is connected to the corresponding nozzle assembly; The nozzle valve block contains two valve cores, one above the other. Each valve core corresponds to one nozzle assembly. The two valve cores are supported within the nozzle valve block by their respective rotating shafts and are mirror-image positioned along the centerline of the valve block. The valve cores swing at a certain angle with their corresponding rotating shafts, forming a swing valve core and realizing the opening and closing action of the injection valve. The valve cores are semi-cylindrical. The cylindrical surface of the semi-cylindrical valve core has an oil groove connecting the oil inlet and outlet channels after the valve core swings to a fixed small angle. The axis of the oil groove is perpendicular to the axes of the oil inlet and outlet channels. When the oil groove aligns with oil holes I and II, it is in the open state; when the oil groove is offset from oil holes I and II, it is in the closed state. The non-cylindrical surface of the semi-cylindrical valve body has outwardly protruding bosses, each containing a permanent magnet. Electromagnets are installed on the left and right sides of the bosses. The two electromagnets directly drive the valve cores to swing. The bosses of the two valve cores are positioned opposite each other.

2. The novel injection valve for injection beams as described in claim 1, characterized in that: The opening and closing action of the injection valve is driven by the alternating magnetic field of the electromagnets distributed on both sides of the permanent magnet embedded in the valve core.

3. The novel injection valve for injection beams as described in claim 1, characterized in that: The permanent magnet inside the boss of the valve core drives the valve core to rotate along the valve core's axis; because there is a permanent magnet inside the boss of the valve core, one side of the boss of the valve core is the S pole and the other side is the N pole, that is, assuming that the side of the boss of the valve core closer to the nozzle beam is the S pole, and the side of the boss of the valve core closer to the nozzle assembly is the N pole. When the inner sides of the two electromagnets that form a clamp-like enclosure on both sides of the boss, that is, the side of the two electromagnets facing the permanent magnet are both S poles, the valve core rotates counterclockwise by a fixed small angle because the left magnetic pole of the boss repels and the right magnetic pole attracts. This causes the oil groove on the top cylindrical surface of the valve core to approach and align with the oil hole I and oil hole II in the valve block, thus opening the oil passage. Conversely, when both electromagnets have N poles on their inner sides, the valve core's boss rotates clockwise by a fixed small angle due to the attraction between the left and right magnetic poles and the repulsion between the right and left magnetic poles. This causes the oil groove on the top cylindrical surface of the valve core to move away from and completely offset from the oil holes I and II in the valve block, thereby closing the oil circuit.

4. The novel injection valve for injection beams as described in claim 1, characterized in that: The liquid pressure on the valve core is radial, and the opening and closing force of the valve core is radial tangential force.

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