A fluidic valve signal pressure point of action adjustment device

Abstract

The application relates to a kind of jet valve signal pressure action point adjusting devices, including adjusting device body, bellows assembly, action piece, elastic connecting structure, position adjusting structure, bellows assembly is fixedly connected on adjusting device body, the bellows of bellows assembly lower end connects action piece, action piece acts on the lever of jet valve through arc bottom, and the other end of action piece is connected with adjusting device body through elastic connecting structure;Position adjusting structure is connected between adjusting device body and jet valve shell.The device of the application is convenient to adjust signal pressure action point position, compact structure, reliable work, and can be applied to the small steam turbine of ship which needs different jet valve signal pressure characteristics.

Description

Technical Field

[0001] The invention relates to a jet valve for a small steam turbine used on a ship, in particular to a device for adjusting the signal pressure action point of the jet valve. Background Art

[0002] Jet valves are still widely used in the regulation of small marine steam turbines, especially when boiler pressure and feedwater pump outlet pressure serve as the two signal pressures for the jet valve. When the position of the signal pressure application point is constant, and the jet valve output state is the same, there is a linear equation relationship between the two signal pressures received by the jet valve. By changing the position of the signal pressure application point, the slope of this linear equation can be changed, thereby having a wider range of applications. Therefore, it is necessary to design a jet valve signal pressure application point adjustment device for use in small steam turbines in the field of marine hydraulic regulation. By adjusting the position of the signal pressure application point on the lever, the slope of the linear equation between the signal pressures can be easily changed, thereby expanding the scope of use of the jet valve and making it easier to adjust and adjust it on site according to actual usage conditions. Summary of the Invention

[0003] The present invention proposes a jet valve signal pressure action point adjustment structure, which can conveniently change the signal pressure action point by adjusting a device combining a screw, a stopper, an action plate, and a bellows assembly. The structure is suitable for small steam turbines in the field of marine hydraulic regulation.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a jet valve signal pressure action point adjustment device, including an adjustment device body, a bellows assembly, an action plate, an elastic connection structure, and a position adjustment structure. The bellows assembly is fixedly connected to the adjustment device body, and the bellows at the lower end of the bellows assembly is connected to the action plate. The action plate acts on the lever of the jet valve through the arc bottom, and the other end of the action plate is connected to the adjustment device body through an elastic connection structure; a position adjustment structure is connected between the adjustment device body and the jet valve housing.

[0005] Furthermore, the bellows assembly is fixed to the adjustment device body by means of bellows assembly mounting bolts.

[0006] Furthermore, the bellows assembly includes a signal pressure pipe joint, a square joint, a push rod and a bellows. The push rod is placed in the square joint and the lower end is connected to the bellows. The signal pressure pipe joint is connected to the square joint, and the lower end of the bellows is connected to the action plate through a cylindrical pin and a compensation gasket.

[0007] Furthermore, the signal pressure is connected through the signal pressure pipe joint on the bellows assembly, and acts on the action plate with the arc bottom through the cylindrical pin and the compensation gasket.

[0008] Furthermore, the elastic connection structure includes a spring plate, a connecting plate, and a mounting plate. One end of the connecting plate is connected to the action plate through the spring plate, and the other end is connected to the mounting plate through the spring plate. The mounting plate is fixed to the adjustment device body with a mounting bolt.

[0009] Furthermore, the position adjustment structure includes an adjusting screw and a stop. The stop is fixed to the jet valve housing with a stop mounting bolt and is connected to the adjustment device body through an adjusting screw, which is used to adjust the position of the bottom of the arc of the action plate on the jet valve lever, thereby changing the signal pressure characteristics.

[0010] Furthermore, the stopper is L-shaped, the bottom plate is provided with a stopper mounting threaded hole, and the right-angle plate is provided with a stopper U-shaped groove. The adjustment screw is clamped in the stopper U-shaped groove of the stopper and rotates.

[0011] The beneficial effects of the present invention are:

[0012] The device of the present invention is convenient for adjusting the position of the signal pressure action point, has a compact structure, and is reliable in operation, and can be applied to small marine steam turbines requiring different jet valve signal pressure characteristics.

[0013] The present invention can be applied to the occasion of a jet valve with a deflection plate, where high-pressure water is ejected from a nozzle and flows through the deflection plate to two receiving holes, which are connected to two output pipes and can lead to the hydraulic cylinder piston and other devices to be driven respectively. Two signal pressures (such as the pressure of a marine boiler and the outlet pressure of a feed water pump) act on a lever connected to the deflection plate. Changing the signal pressure can cause the lever to rotate, thereby driving the deflection plate to swing, and thus changing the output state of the jet valve. When the position of the signal pressure action point on the lever is constant, under the same output state, the relationship between the signal pressures is a straight line equation relationship, and the slope of the straight line is determined by the position of the signal pressure action point. By adjusting the position of the signal pressure action point on the lever, the slope of the straight line equation between the signal pressures can be conveniently changed, thereby expanding the scope of use of the jet valve and making it more convenient to perform on-site calibration and adjustment according to actual usage conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the device for adjusting the signal pressure action point of the jet valve of the present invention;

[0015] Figure 2 is a schematic diagram of a bellows assembly;

[0016] Figure 3 It is the three-view drawing of the stop structure;

[0017] Among them: (a) is the main view, (b) is the left view, and (c) is the top view;

[0018] Figure 4 It is a schematic diagram of the adjustment screw;

[0019] Figure 5 This is a schematic diagram of a jet valve signal pressure action point adjustment device applied to a deflection plate type jet valve;

[0020] Figure 6 yes Figure 5 AA cross-sectional view. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 As shown, an embodiment of the present invention provides a jet valve signal pressure action point adjustment device, which includes a stop mounting bolt 1, an adjustment screw 2, a stop 3, a mounting bolt 4, an adjustment device body 5, a bellows assembly mounting bolt 6, a bellows assembly 7, an O-ring 8, a bellows assembly O-ring 9, a cylindrical pin 10, a compensation gasket 11, an action plate 12, a spring plate 13, a mounting bolt 14, a connecting plate 15, and a mounting plate 16.

[0023] like Figure 2 As shown, the bellows assembly 7 consists of a signal pressure pipe joint 7-1, a square joint 7-2, a push rod 7-3, an O-ring 8 and a bellows 7-4.

[0024] The bellows assembly 7 is secured to the adjustment device body 5 via the bellows assembly mounting bolts 6. The active plate 12 is connected to the connecting plate 15 and the mounting plate 16 via the spring plate 13 and secured to the adjustment device body 5 with the mounting bolts 14. Signal pressure is introduced through the signal pressure pipe connector 7-1 on the bellows assembly 7 and acts on the active plate 12 with the arc bottom A via the cylindrical pin 10 and the compensating plate 11. The active plate 12 acts on the lever of the jet valve via the arc bottom A. The cylindrical pin 10 connects the compensating gasket 11 to the bellows 7-4. The compensating gasket 11 can make the signal pressure transmitted through the bellows 7-4 more uniform. Changing the position of the arc bottom of the active plate 12 on the lever can change the slope of the linear relationship between the signal pressures, thereby changing the signal pressure characteristics.

[0025] When the device of the invention is used, it is fixed to the jet valve housing by means of four mounting bolts 4 , and the stopper 3 is fixed to the jet valve housing by means of the stopper mounting bolts 1 .

[0026] like Figure 3 As shown in (a), (b) and (c), the stopper 3 is L-shaped, a stopper mounting threaded hole is provided on the bottom plate, and a stopper U-shaped groove is provided on the right-angle plate. Figure 4 The adjusting screw 2 is shown, and the adjusting screw 2 is stuck in the stop U-shaped groove of the stop and rotates.

[0027] Take the application of the device to a deflection plate type jet valve as an example. The jet valve uses water as the working medium. The water supply main 23 provides high-pressure water, which is ejected through two nozzles 24. At the same time, there are two receivers 20 corresponding to two output pressures (P1, P2). Figure 5 , as shown in Figure 6. The deflection plate 21 is mounted on a lever 22, which rotates around a rolling bearing 25. Two signal pressures act on the lever 22 through bellows assemblies 7. One of the bellows assemblies 7 is provided by the signal pressure application point adjustment device of the present invention, which can adjust the position at which the signal pressure acts on the lever 22, i.e., the force arm. During adjustment, if the force arm at the signal pressure application point needs to be increased, the mounting bolt 4 can be loosened first and the adjustment screw 2 can be rotated clockwise. Since the adjustment screw 2 is mounted in the U-shaped groove of the stop 3 and does not move axially, the adjustment device body 5 will move relative to the adjustment screw 2, approaching the stop 3, thereby increasing the force arm at the signal pressure application point. After adjusting to the desired position, the mounting bolt 4 can be retightened. Conversely, if the force arm at the signal pressure application point needs to be reduced, the mounting bolt 4 can be loosened first and the adjustment screw 2 can be rotated counterclockwise. Since the adjustment screw does not move axially, the adjustment device body 5 will move away from the stop 3. After reaching the desired position, the mounting bolt 4 can be retightened.

Claims

1. A device for adjusting the pressure action point of a jet valve signal, characterized in that: It includes an adjustment device body, a bellows assembly, an action piece, an elastic connection structure, and a position adjustment structure. The bellows assembly is fixedly connected to the adjustment device body. The bellows at the lower end of the bellows assembly is connected to the action piece. The action piece acts on the lever of the jet valve through the arc bottom. The other end of the action piece is connected to the adjustment device body through the elastic connection structure. A position adjustment structure is connected between the adjustment device body and the jet valve housing.

2. The device for adjusting the signal pressure action point of a jet valve according to claim 1, characterized in that: The bellows assembly is fixed to the adjusting device body by means of bellows assembly mounting bolts.

3. The device for adjusting the signal pressure action point of a jet valve according to claim 1, characterized in that: The bellows assembly includes a signal pressure pipe joint, a square joint, a push rod and a bellows. The push rod is placed in the square joint and the lower end is connected to the bellows. The signal pressure pipe joint is connected to the square joint. The lower end of the bellows is connected to the action plate through a cylindrical pin and a compensation gasket.

4. The device for adjusting the signal pressure action point of a jet valve according to claim 3, characterized in that: The signal pressure is connected through the signal pressure pipe joint on the bellows assembly and acts on the action piece with a circular bottom through a cylindrical pin and a compensation gasket.

5. The device for adjusting the signal pressure action point of a jet valve according to claim 1, characterized in that: The elastic connection structure includes a spring sheet, a connecting sheet and a mounting sheet. One end of the connecting sheet is connected to the action sheet through the spring sheet, and the other end is connected to the mounting sheet through the spring sheet. The mounting sheet is fixed to the adjustment device body with mounting bolts.

6. The device for adjusting the signal pressure action point of a jet valve according to claim 1, characterized in that: The position adjustment structure includes an adjusting screw and a stop. The stop is fixed to the jet valve housing with a stop mounting bolt and is connected to the adjustment device body through an adjusting screw. It is used to adjust the position of the arc bottom of the action piece on the jet valve lever, thereby changing the signal pressure characteristics.

7. The device for adjusting the signal pressure action point of a jet valve according to claim 6, characterized in that: The stopper is L-shaped, a stopper mounting threaded hole is provided on the bottom plate, a stopper U-shaped groove is provided on the right-angle plate, and the adjustment screw is clamped in the stopper U-shaped groove of the stopper and rotates.

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