Discharge valve for melting and mixing system

Abstract

A blow-off valve for a melting and mixing system comprises an oil cylinder, a sliding column, a lining and a supporting plate, the sliding column is driven by a piston rod of the oil cylinder to move in the lining, the structure is simple, a limiting plate is installed at the end of the sliding column, and the limiting plate is provided with a U-shaped opening part extending towards one supporting rod in the radial direction. On one hand, the U-shaped opening part is arranged on one side of the supporting rod in a semi-surrounding mode through the U-shaped opening, the limiting plate is prevented from rotating relative to the supporting rod, the situation of deviation or looseness cannot occur after the sliding column reciprocates for multiple times, the service life is prolonged, on the other hand, the side wall of the U-shaped opening part can be detected by the lining and a sensor on the supporting plate respectively, and the reliability is improved. According to the blow-off valve, whether the sliding column is located at the discharging position or the ground discharging position can be detected in real time only by rotating the sliding column, so that an electric control system can automatically control the position of the sliding column, and compared with the prior art, the installation structure of the blow-off valve on the machine barrel is simplified, and the performance of the blow-off valve is improved.

Description

Technical Field

[0001] The utility model relates to the field of melt mixing systems, in particular to a discharge valve used in melt mixing systems. Background Art

[0002] The mixing, extrusion and granulation unit is capable of mixing, plasticizing, extruding, pelletizing, separating and drying materials, and ultimately processing them into regular granular products. The melt mixing system is an important part of the mixing, extrusion and granulation unit, and mainly includes a barrel and a support. A conveying screw is inserted into the mixing chamber of the barrel, and the end of the conveying screw is installed in the support. The material is heated in the mixing chamber and melted and plasticized by the action of the conveying screw. A discharge valve is usually installed on the last section of the discharge barrel. The discharge valve can control the opening or closing of the discharge port through the movement of the slide. At the initial startup of the mixing, extrusion and granulation unit, the discharge valve is opened to discharge the remaining waste material through the discharge port, and then the discharge valve is closed to allow the material to flow out of the discharge barrel normally to the subsequent process. The existing discharge valve structure is relatively complex, and it is difficult to automatically control the position of the slide. After the slide moves back and forth multiple times, the slide is prone to displacement or loosening. Utility Model Content

[0003] In order to solve the problem that the existing discharge valve is difficult to automatically control the position of the slide column and the slide column is prone to deviation or loosening, the utility model provides a discharge valve for a melt mixing system.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a discharge valve for a melt mixing system is installed on the side wall of a discharge barrel, a mixing chamber and a discharge chamber are provided inside the discharge barrel, and a discharge port is provided at the bottom of the discharge barrel. The discharge valve comprises an oil cylinder, a sliding column, a bushing and a support plate, the bushing is passed through a through hole in the side wall of the discharge barrel, the end of the bushing is connected to the outer wall of the discharge barrel, the side wall of the bushing is provided with an opening corresponding to the discharge port, the sliding column is passed through the inner hole of the bushing, the outer wall of the discharge barrel is connected to the support plate through a plurality of support rods, and the oil cylinder is installed on the support plate. On the plate, the piston rod of the oil cylinder passes through the support plate and is connected to the limit plate. The limit plate is installed at the end of the sliding column extending from the bushing. The limit plate extends radially toward one of the support rods and semi-encloses one side of the support rod through the U-shaped opening, thereby preventing the limit plate from rotating relative to the support rod. Sensors are respectively installed on the bushing and the support plate. The sensors can detect the radially extending part of the limit plate. When the sensor of the bushing detects the limit plate, the sliding column is located at the discharging position blocking the discharge port. When the sensor of the support plate detects the limit plate, the sliding column is located at the discharge position where the discharge port is opened.

[0005] Preferably, one end of the slide post extending into the bushing has an inclined surface matching the inner wall of the discharge cavity. When the slide post is located at the discharge position, the inclined surface of the slide post and the inclined surface of the inner wall of the discharge cavity are smoothly connected.

[0006] According to the above technical solution, the beneficial effects of the utility model are:

[0007] The U-shaped opening is semi-enclosed on one side of the support rod through the U-shaped opening to prevent the limit plate from rotating relative to the support rod. The slide column will not deviate or loosen after multiple reciprocating movements, thereby extending its service life. On the other hand, the side walls of the U-shaped opening can be detected by sensors on the bushing and the support plate respectively, so that it can detect in real time whether the slide column is in the discharging position or the discharging position, so that the electronic control system can automatically control the position of the slide column. Compared with the prior art, it not only simplifies the installation structure of the discharge valve on the barrel, but also improves the performance of the discharge valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is the main sectional view when the slide column is at the discharge position;

[0009] Figure 2 for Figure 1 AA partial cross-section diagram;

[0010] Figure 3 This is a front cross-sectional view of the sliding column when it is in the ground displacement position.

[0011] Markings in the figure: 1. Discharge barrel, 2. Mixing chamber, 3. Discharge chamber, 4. Discharge port, 5. Through hole, 6. Bushing, 7. Slide column, 8. Piston rod, 9. Cylinder, 10. Support plate, 11. Support rod, 12. Limit plate, 13. Sensor. DETAILED DESCRIPTION

[0012] With reference to the accompanying drawings, the specific implementation is as follows:

[0013] like Figure 1 As shown, a discharge valve for a melt mixing system is installed on the side wall of a discharge barrel 1. A mixing chamber 2 and a discharge chamber 3 are provided inside the discharge barrel 1. A discharge port 4 is provided at the bottom of the discharge barrel 1. The discharge valve includes an oil cylinder 9, a slide column 7, a bushing 6, and a support plate 10. The bushing 6 is inserted into a through hole 5 on the side wall of the discharge barrel 1. The end of the bushing 6 is connected to the outer wall of the discharge barrel 1. The side wall of the bushing 6 is provided with an opening corresponding to the discharge port 4. The slide column 7 is inserted into the inner hole of the bushing 6. One end of the slide column 7 extending into the bushing 6 has an inclined surface that matches the inner wall of the discharge chamber 3, as shown in FIG. Figure 1 As shown, at this time, the slide post 7 is located at the discharge position of the ground outlet 4, and the inclined surface of the slide post 7 and the inclined surface of the inner wall of the discharge cavity 3 are smoothly connected; Figure 3 As shown, the sliding column is relative to Figure 1 The position of 7 moves to the right, and the ground discharge position 7 is located with the ground discharge port 4 opened.

[0014] The outer wall of the discharge barrel 1 is connected to the support plate 10 through a plurality of support rods 11, and the oil cylinder 9 is installed on the support plate 10. The piston rod 8 of the oil cylinder 9 passes through the support plate 10 and is connected to the limit plate 12. The limit plate 12 is installed at the end of the sliding column 7 extending from the bushing 6. The limit plate 12 extends radially toward one of the support rods 11 and is semi-enclosed on one side of the support rod 11 through a U-shaped opening, thereby preventing the limit plate 12 from rotating relative to the support rod 11. When the sliding column 7 reciprocates multiple times, it will not deviate or loosen, thereby extending its service life.

[0015] Sensors 13 are mounted on the bushing 6 and the support plate 10 respectively. The sensors 13 can detect the radially extending portion of the limit plate 12. Figure 1 As shown, at this time, the sensor 13 of the bushing 6 can detect the limit plate 12, and the sliding column 7 is located at the discharge position of the ground outlet 4; Figure 3 As shown, at this time, the sensor 13 of the support plate 10 can detect the limit plate 12, and the slide column 7 is in the ground discharge position with the ground discharge port 4 open. The sensor 13 sends a signal to the electronic control system, which can detect in real time whether the slide column 3 is in the discharge position or the ground discharge position, so that the electronic control system can automatically control the position of the slide column 3.

Claims

1. A discharge valve for a melt mixing system, mounted on the side wall of a discharge barrel (1), wherein a mixing chamber (2) and a discharge chamber (3) are provided inside the discharge barrel (1), and a discharge port (4) is provided at the bottom of the discharge barrel (1), characterized in that: The discharge valve comprises an oil cylinder (9), a sliding column (7), a bushing (6) and a support plate (10), wherein the bushing (6) is inserted into a through hole (5) on the side wall of the discharge barrel (1), the end of the bushing (6) is connected to the outer wall of the discharge barrel (1), the side wall of the bushing (6) is provided with an opening corresponding to the discharge port (4), the sliding column (7) is inserted into the inner hole of the bushing (6), the outer wall of the discharge barrel (1) is connected to the support plate (10) through a plurality of support rods (11), the oil cylinder (9) is mounted on the support plate (10), the piston rod (8) of the oil cylinder (9) penetrates the support plate (10) and is connected to the limit plate (12), and the limit plate (12) is mounted on one end of the sliding column (7) extending from the bushing (6). The limit plate (12) extends radially toward one of the support rods (11) and is semi-enclosed on one side of the support rod (11) through the U-shaped opening, thereby preventing the limit plate (12) from rotating relative to the support rod (11). Sensors (13) are respectively installed on the bushing (6) and the support plate (10). The sensor (13) can detect the radially extending portion of the limit plate (12). When the sensor (13) of the bushing (6) detects the limit plate (12), the slide column (7) is located at the discharge position of the ground outlet (4) when the sensor (13) of the support plate (10) detects the limit plate (12). The slide column (7) is located at the ground outlet position of the ground outlet (4) when the sensor (13) of the support plate (10) detects the limit plate (12).

2. A discharge valve for a melt mixing system according to claim 1, characterized in that: One end of the slide column (7) extending into the bushing (6) has an inclined surface matching the inner wall of the discharge cavity (3); when the slide column (7) is located at the discharge position, the inclined surface of the slide column (7) and the inclined surface of the inner wall of the discharge cavity (3) are smoothly connected.

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