CN100425891C - Variable-flow injection valve for rolled oil - Google Patents

Abstract

The invention relates to a rolling oil variable flow injection valve, the valve seat extends into the beam body through the side wall of the beam body, the compression flange is arranged on the other side of the beam body, and is threadedly connected with the valve seat to form an inner cavity space, and the compression method The inner circle of the flange has an axial positioning convex edge, and the inner circle of the valve seat also has an axial positioning convex edge. The inner cavity space is equipped with a sealing elastic gasket, a static ceramic piece, a moving ceramic piece and a rotating shaft, and a sealing elastic gasket The ceramic plate is in contact with the positioning convex edge of the inner circle of the compression flange, the movable ceramic plate and the static ceramic plate form a variable flow sealing pair, one end of the rotating shaft is connected with the moving ceramic plate, and the other end of the rotating shaft is exposed to the outside and connected to the stepping motor; The front end of the valve seat is provided with an oil port, which corresponds to the oil channel of the variable flow sealing pair; the fan-shaped grooves of the moving ceramic plate and the fan-shaped grooves of the static ceramic plate cooperate at different positions to form variable flow windows of different sizes. The invention realizes the continuous variable flow adjustment of the rolling oil, is beneficial to improving the cooling control level of the rolling mill, and meets the requirements of non-ferrous metal processing.

Description

Rolling Oil Variable Flow Injection Valve

technical field

The invention relates to a variable flow injection valve, in particular to a rolling oil variable flow injection valve used in the lubricating cooling system of a nonferrous metal processing plate, strip and foil mill.

Background technique

The traditional injection valve is used in the pressure accumulation type injection system. The injection valve includes a control chamber, the accumulated high-pressure oil is sent to the control chamber by the line, and a throttling injection channel through which the high-pressure oil is injected. When adjusting the valve element , the pressurized oil in the oil channel will be sprayed in the designated space at a variable flow rate.

At present, when non-ferrous metal processing plate, strip and foil mills control the roll cooling in sections, they all use switch-type injection valves to control the amount of oil by adjusting the opening and closing time.

For a long time, in order to meet the needs of industrial development, it will be a worthwhile study to develop a new type of continuously variable flow jet valve, which can meet the flow control requirements and ensure good sealing performance. The economic and social benefits are relatively large, technically difficult subjects.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a variable flow injection valve for rolling oil, which aims to effectively solve the problem of continuously variable flow of the injection valve, improve sealing and other performances, and make it meet the requirements of non-ferrous metal processing.

The purpose of the present invention is achieved through the following technical solutions:

The rolling oil variable flow injection valve includes a valve seat, which is characterized in that: the valve seat extends into the beam body through the side wall of the beam body, and the compression flange is arranged on the other side of the beam body, and the compression flange and the valve seat Threaded connection forms an inner chamber space, the inner circle of the compression flange has an axial positioning flange, and the inner circle of the valve seat also has an axial positioning flange, and a sealing elastic gasket, The static ceramic plate, the moving ceramic plate and the rotating shaft, the sealing elastic gasket is in contact with the positioning convex edge of the inner circle of the compression flange, the moving ceramic plate and the static ceramic plate form a variable flow sealing pair, and one end of the rotating shaft is connected with the moving ceramic plate , the axial positioning step on the outer circle of the rotating shaft matches the axial positioning flange on the inner circle of the valve seat, and the other end of the rotating shaft is exposed and connected to the stepping motor; the front end of the valve seat is provided with an oil port, which is connected to the variable flow The oil channel of the sealing pair is corresponding; there are fan-shaped grooves on the moving ceramic plate, and fan-shaped grooves on the static ceramic plate. Through the cooperation of the fan-shaped grooves of the moving ceramic plate and the fan-shaped grooves of the static ceramic plate at different positions, variable sizes are formed. flow window.

The purpose of the present invention is also further achieved through the following more detailed technical solutions:

In the rolling oil variable flow injection valve described above, two sections of fan-shaped grooves are opened on the moving ceramic plate, and correspondingly, two sections of fan-shaped grooves of the same angle are opened on the static ceramic piece.

Furthermore, in the rolling oil variable flow injection valve mentioned above, one end of the rotating shaft is connected to the moving ceramic plate in the shape of a "one" groove, and one end of the rotating shaft is in the shape of "one". groove, the "one" word end of the rotating shaft is inserted in the "one" word groove of the moving tile.

Furthermore, in the rolling oil variable flow injection valve mentioned above, the stepping motor and the rotating shaft are connected by a coupling.

Furthermore, in the rolling oil variable flow injection valve mentioned above, the material of the sealing elastic gasket is oil-resistant rubber.

The outstanding substantive features and remarkable progress of the technical solution of the present invention are mainly reflected in: adopting the structural design of the moving porcelain piece and the static porcelain piece, the two are closely connected together, and there is good sealing performance between the contact surfaces; at the same time, in the step Driven by the motor, the moving ceramic piece rotates reciprocally within a certain angle range, so that the fan-shaped area where the moving ceramic piece and the static porcelain piece overlap changes, so that the controllable, continuous, Variable flow adjustment improves the cooling control level of the rolling mill. Moreover, the use of the ceramic valve core not only improves the sealing performance, but also increases the service life of the valve.

Description of drawings

Below in conjunction with accompanying drawing, technical solution of the present invention will be further described:

Fig. 1: structural representation of the present invention;

Fig. 2a: the front view of the moving ceramic piece of the present invention;

Fig. 2b: A-A cross-sectional diagram of Fig. 2a;

Figure 2c: B-B cross-sectional schematic diagram of Figure 2a;

Fig. 3a: the front view of the static ceramic sheet of the present invention;

Figure 3b: a schematic cross-sectional view of C-C in Figure 3a;

Figure 3c: D-D cross-sectional schematic diagram of Figure 3a;

Figure 4a: A schematic diagram of a variable flow sealing pair in a fully open state composed of a moving ceramic plate and a static ceramic plate;

Figure 4b: A schematic diagram of a fully closed state variable flow sealing pair composed of a moving ceramic piece and a static ceramic piece;

Figure 5a: Front view of the valve seat of the present invention;

Figure 5b: a top view of the valve seat of the present invention;

Figure 5c: right side view of the valve seat of the present invention;

Figure 6a: a schematic diagram of the application of the fully open state of the present invention;

Fig. 6b: a schematic diagram of the application of the fully closed state of the present invention.

See the table below for the meanings of the symbols in the figure:

Reference signs meaning Reference signs meaning Reference signs meaning 1 stepper motor 2 Coupling 3 Seat 4 Shaft 5 Moving tiles 6   Static Porcelain 7 Sealing elastic gasket 8 nozzle 9 Compression flange 10 beam body 11 oil port on valve seat

Detailed ways

The invention provides a rolling oil variable flow injection valve, which is combined and installed with a beam body to exert its function. The beam body includes an oil inlet and an inner cavity connected to the oil inlet. The inner cavity is an oil storage space, and the rolling oil to be sprayed is stored in the space in the form of high pressure; the dynamic ceramic plate and the static ceramic plate form a variable flow seal. Vice, the fan-shaped grooves on the moving ceramic plate and the fan-shaped grooves on the static ceramic plate cooperate in different positions to form variable flow windows of different sizes, so as to adjust the flow of rolling oil. The rolling oil is sprayed from the outlet of the compression flange to the designated position through the nozzle. The invention adopts a stepping motor to drive the movable tile to realize good flow regulation effect.

As shown in Fig. 1-6b, the entire injection valve includes a stepping motor 1, a coupling 2, a compression flange 9, a valve seat 3, a rotating shaft 4, a moving porcelain piece 5, a static porcelain piece 6, a sealing elastic gasket pressing The tight flange 9 and several sealing rings are attached to the beam body for installation, the valve seat extends into the beam body 10 through the side wall of the beam body, the compression flange 9 is arranged on the other side of the beam body 10, and the compression flange 9 is threadedly connected with the valve seat 3 to form an inner cavity space, the inner circle of the compression flange 9 has an axial positioning flange, and the inner circle of the valve seat 3 also has an axial positioning flange, and the inner cavity space is equipped with The sealing elastic gasket 7, the static ceramic sheet 6, the moving ceramic sheet 5 and the rotating shaft 4, the sealing elastic gasket 7 is in contact with the positioning convex edge of the inner circle of the compression flange 9, and the moving ceramic sheet 5 and the static ceramic sheet 6 form a variable For the flow seal pair, one end of the rotating shaft 4 is connected to the moving ceramic piece 5 in the shape of a "one" groove, and one end of the rotating shaft 4 is in the shape of a "one". Correspondingly, the moving ceramic piece 5 has a "one" groove, and the rotating shaft 4 Insert the "one" end of the moving ceramic plate 5 into the "one" groove; the axial positioning step on the outer circle of the rotating shaft 4 matches the axial positioning convex edge on the inner circle of the valve seat 3, and the other end of the rotating shaft 4 is exposed Externally, it is connected with the stepper motor 1 through the coupling 2; the front end of the valve seat 3 is provided with an oil port 11, which corresponds to the oil channel of the variable flow sealing pair; the moving ceramic plate 5 has two fan-shaped grooves, Also have two fan-shaped grooves of the same angle on the static ceramic sheet 6, the cooperation of the different positions of the fan-shaped grooves on the moving ceramic sheet and the fan-shaped grooves on the static ceramic sheet constitutes variable flow windows of different sizes. The oil outlet of the compression flange 9 is equipped with a nozzle 8; the material of the sealing elastic gasket 7 is oil-resistant rubber, and its elastic variable can make up for the margin during assembly and application, so as to ensure the best gap between the moving ceramic plate 5 and the static ceramic plate 6. Appropriate clearance.

In specific applications, the beam body 10 is filled with pressurized liquid. According to the needs of the rolling process, the stepping motor 1 drives the rotating shaft 4 through the coupling 2 to drive the moving tile 5 to rotate. There are two sections of fan-shaped grooves, and there are two sections of fan-shaped grooves with the same angle on the static porcelain piece 6. When the fan-shaped grooves on the moving porcelain piece 5 and the fan-shaped grooves on the static porcelain piece 6 are completely staggered, the valve is closed. The fan-shaped groove on the piece 5 and the fan-shaped groove on the static ceramic piece 6 are completely overlapped, and the valve is in a fully open state, and the size can be adjusted in the middle, so as to realize independent continuous or step-by-step control of the flow rate of the injection valve.

The rotation angle of the stepping motor 1 is between 0 and 90 degrees, the valve port is closed at 0 degrees, and the valve is fully opened at 90 degrees. When the rolling mill is ready to start, the stepping motor is at the 0 degree position, and the stepping motor is required to quickly turn to the angle position required for normal rolling during spraying. The intermediate process is between the minimum angle that can form a spraying shape and 90 degrees according to the shape of the plate. Make adjustments. It should be noted that in terms of electrical control, the rotation angle of the stepper motor cannot exceed the range of 0 to 90 degrees, and the current position can be memorized. When the power is turned on again after a sudden power failure or other failure, it can automatically find the 0 degree position. Usually, the flow change curve under any pressure when the stepper motor changes between 0 and 90 degrees is obtained by computer; in practical applications, the valve is first opened to an appropriate position, and when the plate shape needs to be adjusted, it is approached to the required position using a gradual method. It should be noted that the selection of the common cathode or common anode of the wiring of the stepper motor drive device should match the control module of the PLC.

The application shows that the invention realizes the continuously variable flow and improves the cooling control level; through the application of the ceramic valve core, the sealing and other performances are effectively improved; the service life and performance better meet the requirements of non-ferrous metal processing.

The above are only specific application examples of the present invention, and do not constitute any limitation to the protection scope of the present invention. All technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.

Claims (5)

1. variable-flow injection valve for rolled oil, comprise valve seat, it is characterized in that: described valve seat (3) passes the beam body sidewall and stretches in the beam body (10), supported flange (9) is arranged on the opposite side of beam body (10), supported flange (9) is threaded with valve seat (3) and forms an intracavity space, the interior round belt of supported flange (9) has the axially locating chimb, the interior fenestra of valve seat (3) has the axially locating chimb, sealing resilient pad (7) is housed in described intracavity space inside, stable ceramic piece (6), dynamic porcelain piece (5) and rotating shaft (4), sealing resilient pad (7) contacts with the location chimb of circle in the supported flange (9), dynamic porcelain piece (5) constitutes unsteady flow amount sealing pair with stable ceramic piece (6), one end of rotating shaft (4) is connected with dynamic porcelain piece (5), axially locating chimb in axially locating step on rotating shaft (4) cylindrical and the valve seat (3) on the circle matches, and the other end of rotating shaft (4) shows out with stepper motor (1) and links to each other; The front end of described valve seat (3) is provided with hydraulic fluid port (11), and is corresponding with the oil duct of unsteady flow amount sealing pair; Described dynamic porcelain piece has fan groove on (5), and stable ceramic piece also has fan groove on (6), and the dynamic porcelain piece fan groove constitutes the unsteady flow amount window that varies in size with the stable ceramic piece fan groove in cooperating of diverse location.

2. variable-flow injection valve for rolled oil according to claim 1 is characterized in that: have two sections fan grooves on the described dynamic porcelain piece (5), correspondingly, also have the fan groove of two sections same angles on the stable ceramic piece (6).

3. variable-flow injection valve for rolled oil according to claim 1, it is characterized in that: an end of rotating shaft (4) is connected for " one " word slot type with dynamic porcelain piece (5), one end of rotating shaft (4) is " one " font, correspondingly, have " one " word groove on the dynamic porcelain piece (5), " one " word end of rotating shaft (4) inserts in " one " word groove of dynamic porcelain piece (5).

4. variable-flow injection valve for rolled oil according to claim 1 is characterized in that: adopt coupling (2) to be connected between stepper motor (1) and the rotating shaft (4).

5. variable-flow injection valve for rolled oil according to claim 1 is characterized in that: the material of described sealing resilient pad (7) is an oil resistant rubber.

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