Ball valve type automatic air supply device

Abstract

The utility model belongs to the field of oil pressure filling air supply, is used for automatic air supply of an oil pressure filling device or other energy storage devices of a hydropower station, and particularly relates to a ball valve type automatic air supply device which comprises a two-position three-way valve, a filter, a manual exhaust valve, a one-way valve and a manual air supply valve. A pressure switch is arranged between the one-way valve and the pressure oil tank cavity A, an exhaust cavity O is formed in the left side of the two-position three-way valve, one end of a manual exhaust valve communicates with the exhaust cavity O, and the other end of the manual exhaust valve communicates with the pressure oil tank cavity A; one end of the manual gulp valve is communicated with the P pressure source cavity, and the other end of the manual gulp valve is communicated with the A pressure oil cavity. The ball valve structure is adopted, so that the sealing performance is good, the integration degree is high, and the size is small.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic gas replenishment and is used for automatic gas replenishment of hydraulic gas replenishment devices in hydropower stations or other energy storage devices. Specifically, it relates to a ball valve type automatic gas replenishment device. Background Technology

[0002] During the operation of hydropower station turbines, in order to improve the turbine's operating condition, automatic air replenishment is performed on the hydropower station's pressure oil tank device or other energy storage devices to maintain the internal gas-liquid ratio and improve phenomena such as turbine cavity and cavitation. For example, a turbine air replenishment device disclosed in patent number ZL200520099679.0 has a control regulating valve, ejector, energy storage tank, and air replenishment pipe connected to the main air replenishment pipe. Air replenishment ports are set on both sides of the air replenishment pipe, and valve plates are set at the air replenishment ports and hinged to the air replenishment pipe. Air is stored in multiple air storage tanks, and air replenishment is achieved by closing and opening the valve plates. The air replenishment status is adjusted by the control regulating valve. Its structure is relatively complex, the air flow rate of the air replenishment pipe is too small, and the air replenishment status cannot be automatically monitored. Utility Model Content

[0003] The purpose of this invention is to provide a ball valve type automatic air replenishment device to solve the problems of complex structure and small air flow rate in the existing air replenishment device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An automatic air replenishment device of ball valve type includes a two-position three-way valve, a filter, a manual exhaust valve, a check valve, and a manual air replenishment valve. The two-position three-way valve is connected to the A-pressure oil tank cavity set at the front end through the manual check valve. The left side of the two-position three-way valve is provided with an O-exhaust cavity. One end of the manual exhaust valve is connected to the O-exhaust cavity and the other end is connected to the A-pressure oil tank cavity. The right side of the two-position three-way valve is connected to the P-pressure source cavity through the filter. One end of the manual air replenishment valve is connected to the P-pressure source cavity and the other end is connected to the A-pressure oil tank cavity.

[0006] Furthermore, the two-position three-way valve, the manual air replenishment valve, and the manual exhaust valve are all ball valves, and a pressure switch is provided between the one-way valve and the A-pressure oil tank cavity to realize the function of automatically stopping air replenishment.

[0007] Furthermore, it also includes a drive mechanism, which is located above the two-position three-way valve and connected to the valve core of the two-position three-way valve via a coupling.

[0008] Furthermore, the driving mechanism is a drive motor.

[0009] Furthermore, a position window is provided above the drive mechanism, and a manual rotation port is provided on the side.

[0010] This utility model has the following advantages:

[0011] 1. Adopting a ball valve structure, it has low requirements for gas cleanliness and a large gas flow rate, which can greatly shorten the gas replenishment time. It can adapt to the situation of low flow rate and long time when working under low pressure difference. It has good sealing performance, high integration and small size. It can not only realize automatic gas replenishment and automatic stop of gas replenishment, but also the manual rotation port on the drive mechanism can realize on-site manual operation. Especially when the system loses power or manual operation is required for other reasons, it can realize quick manual operation.

[0012] 2. When the pressure tank is automatically filled with air, the pressure switch on the air replenishment device detects the pressure value of the oil tank and sends a valve closing signal to the electric actuator. The three-way valve automatically stops air replenishment under the drive of the electric drive mechanism to prevent excessive air replenishment and avoid accidents.

[0013] 3. When the drive mechanism fails to work, manual exhaust and replenishment can also be achieved through the manual exhaust valve and manual replenishment valve, which are convenient to use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the working principle of this utility model;

[0016] In the diagram, 1-A pressure tank, 2-pressure switch, 3-manual exhaust valve, 4-O exhaust chamber, 5-drive mechanism, 6-position window, 7-manual rotary port, 8-two-position three-way valve, 9-P pressure source chamber, 10-manual air supply valve, 11-check valve, 12-filter. Detailed Implementation

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

[0018] like Figure 1As shown, a ball valve type automatic air replenishment device includes a pressure switch 2, a two-position three-way valve 8, a manual exhaust valve 3, a manual air replenishment valve 10, a one-way valve 11, a drive mechanism 5, and a filter 12. An A-pressure oil tank chamber 1 is located at the front end via the one-way valve 11. A pressure switch 2 is located between the one-way valve 11 and the A-pressure oil tank chamber 1. The two-position three-way valve 8 is connected to the manual air replenishment valve 10, the manual exhaust valve 3, and the one-way valve 11, thus connecting to the A-pressure oil tank chamber 1. An O-exhaust chamber 4 is located on the left side of the two-position three-way valve. One end of the manual exhaust valve 3 is connected to the O-exhaust chamber 4, and the other end is connected to the A-pressure oil tank chamber 1. One end of the manual air replenishment valve 10 is connected to the P-pressure source chamber 9, and the other end... Connect the A-pressure oil tank chamber 1. The drive mechanism 5 is a drive motor, which is located above the two-position three-way valve 8. The drive mechanism 5 is connected to the valve core of the two-position three-way valve through a coupling, and can drive the valve core of the two-position three-way valve 8 to rotate to realize different valve position changes to adapt to air replenishment. A position window 6 is provided above the drive mechanism 5, and a manual rotary port 7 is provided on the side. When manual operation is required, rotating the manual rotary port 7 can replace the drive motor to rotate the valve core of the two-position three-way valve 8. The position of the two-position three-way valve can be displayed and indicated by the position window 6. The two-position three-way valve 8, the manual air replenishment valve 10, and the manual exhaust valve 3 are all ball valves.

[0019] Please refer to Figure 2 Working principle diagram.

[0020] Automatic air replenishment mode:

[0021] When the manual exhaust valve 3 and manual air replenishment valve 10 are closed, and the automatic air replenishment condition is met, the drive mechanism 5 is energized to drive the valve core of the two-position three-way ball valve 8 to rotate. After the valve core rotates to the position, compressed air flows from the air source pressure chamber P through the two-position three-way valve 8, and then through the one-way valve 11 to the A pressure oil tank chamber 1, i.e., the working chamber, to automatically replenish the pressure oil tank device. At this time, the valve position points to the open position, and the position switch outputs the open valve signal.

[0022] When pressure switch 2 detects that the pressure in the oil tank has reached the set value, it needs to stop replenishing air. Drive mechanism 5 is energized to drive the valve core of two-position three-way ball valve 8 to rotate. After the valve core rotates to the position, the A oil tank chamber 1 and the O exhaust chamber 4 are connected. The air stored in the device is discharged from the exhaust chamber. At this time, the valve position points to the closed position, and the position switch outputs a closed valve signal.

[0023] In addition, the automatic air replenishment device can be manually operated on-site at the swivel port on the drive mechanism. Manual operation can be achieved when the system loses power or other reasons require manual operation.

[0024] Manual air replenishment (bleeding) method:

[0025] When manually replenishing air, close the manual air release valve 3 and open the manual air supply valve 10. The gas flows from the P pressure chamber source 9 to the A pressure oil tank chamber 1 to start replenishing air. When the pressure of the oil pressure device rises to the rated value, close the manual air supply valve 10 to stop replenishing air. When manually venting air, close the manual air supply valve 10 and open the manual air release valve 3 to start venting air. When the pressure of the pressure oil tank device drops to the rated value, close the manual air release valve 3 to stop venting air.

Claims

1. A ball valve type automatic air replenishment device, characterized in that: It includes a two-position three-way valve (8), a filter (12), a manual exhaust valve (3), a check valve (11), and a manual air replenishment valve (10). The two-position three-way valve (8) is connected to the A-pressure oil tank cavity (1) set at the front end through the manual check valve (11). The left side of the two-position three-way valve (8) is provided with an O exhaust cavity (4). One end of the manual exhaust valve (3) is connected to the O exhaust cavity (4), and the other end is connected to the A-pressure oil tank cavity (1). The right side of the two-position three-way valve (8) is connected to the P pressure source cavity (9) through the filter (12). One end of the manual air replenishment valve (10) is connected to the P pressure source cavity (9), and the other end is connected to the A-pressure oil chamber (1).

2. The ball valve type automatic air replenishment device according to claim 1, characterized in that: The two-position three-way valve (8), the manual air replenishment valve (10) and the manual exhaust valve (3) are all ball valves, and a pressure switch (2) is provided between the one-way valve (11) and the A-pressure oil tank cavity (1) to realize the automatic stop air replenishment function.

3. The ball valve type automatic air replenishment device according to claim 2, characterized in that: It also includes a drive mechanism (5), which is located above the two-position three-way valve (8) and is connected to the valve core of the two-position three-way valve (8) via a coupling.

4. The ball valve type automatic air replenishment device according to claim 3, characterized in that: The drive mechanism (5) is a drive motor.

5. The ball valve type automatic air replenishment device according to claim 4, characterized in that: The drive mechanism (5) has a position window (6) on top and a manual rotary port (7) on the side.

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