Automatic air charging system for pressure tank

Abstract

The utility model is suitable for oil tank air supplement technical field provides a kind of pressure oil tank automatic air supplement system, including pressure oil device, and pressure oil device includes pressure oil tank, oil pump group, oil return tank, supply system and system return pipeline;The oil outlet end of oil pump group is communicated with pressure oil tank;The oil inlet end of oil pump group is communicated with oil return tank, and one end of supply system is communicated with pressure oil tank, and one end of system return pipeline is communicated with oil return tank;Still include air supplement device, and air supplement device includes electric air supplement valve and check valve, and the air inlet end of electric air supplement valve is communicated with gas source, and the air outlet end of electric air supplement valve is communicated with the air inlet end of check valve, and the air outlet end of check valve is communicated with pressure oil tank, and the check valve is used to prevent the gas in pressure oil tank from flowing to gas source side.The automatic air supplement system of the utility model solves the problem that pressure is still slowly increased after stopping air supplement in prior art, and guarantees the balance stability of pressure oil tank oil level and pressure.

Description

Technical Field

[0001] This utility model belongs to the field of oil tank air replenishment technology, and in particular relates to an automatic air replenishment system for pressure oil tanks. Background Technology

[0002] Currently, in the governor system of hydropower plants, the pressure tank needs to maintain a certain pressure range to provide power to the oil system. The pressure of the oil system is achieved by compressing air stored in the tank. Under normal circumstances, when the system working pressure decreases, the oil level is within the normal working range. The oil pump is used to replenish the hydraulic oil in the tank to restore it to the normal pressure.

[0003] In related technologies, because the tank's seal is not completely airtight, after a certain period of operation, the gas volume decreases and the liquid volume increases, causing the oil level in the pressure tank to rise. At this point, gas needs to be replenished to the pressure tank from the gas source section. After a certain period, the oil level drops back to the normal operating level. Therefore, an automatic gas replenishment system for pressure tanks needs to be designed to control the oil level within a set range. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide an automatic air replenishment system for pressure oil tanks, which aims to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] An automatic air replenishment system for a pressure oil tank, comprising: The oil pressure device includes a pressure oil tank, an oil pump set, a return oil tank, a supply system, and a system return pipeline; the oil outlet of the oil pump set is connected to the pressure oil tank; the oil inlet of the oil pump set is connected to the return oil tank; one end of the supply system is connected to the pressure oil tank; and one end of the system return pipeline is connected to the return oil tank. The gas replenishment device includes an electric gas replenishment valve and a check valve. The inlet of the electric gas replenishment valve is connected to a gas source, and the outlet of the electric gas replenishment valve is connected to the inlet of the check valve. The outlet of the check valve is connected to a pressure oil tank. The check valve is used to prevent gas in the pressure oil tank from flowing back to the gas source.

[0007] Furthermore, it also includes a sensing module, a pressure switch and a level switch, both of which are installed in conjunction with the pressure tank, and both the pressure switch and the level switch are electrically connected to the electrical control system.

[0008] Furthermore, the air replenishment device also includes a manual air replenishment valve, which is connected in parallel with an electric air replenishment valve. The air inlet of both the manual and electric air replenishment valves is connected to an air source, and the air outlet of both the manual and electric air replenishment valves is connected to the air inlet of the check valve.

[0009] Furthermore, the air replenishment device also includes a muffler, which is installed at the outlet of the manual exhaust valve and connected to the outlet of the manual exhaust valve via a pipeline; the inlet of the manual exhaust valve is connected to the exhaust port of the electric air replenishment valve.

[0010] Furthermore, both the pressure switch and the level switch are installed on the tank wall of the pressure oil tank, and the pressure sensing end of the pressure switch and the level sensing end of the level switch both extend into the interior of the pressure oil tank.

[0011] Furthermore, the end of the supply system away from the pressure oil tank is used to connect with the external oil-using equipment of the hydropower plant speed governor, and the end of the system return pipeline away from the return oil tank is used to connect with the external oil-using equipment of the hydropower plant speed governor.

[0012] Compared with the prior art, the technical advantages of this utility model's automatic air replenishment system for pressure oil tanks are as follows: The one-way conduction of the check valve in this utility model gas replenishment device can block the backflow of gas in the pressure oil tank to the gas source. Combined with the structure of the electric gas replenishment valve and the manual gas replenishment valve, it avoids gas leakage and movement after the valve is closed, solves the problem of pressure still slowly increasing after gas replenishment is stopped in the prior art, ensures the balance and stability of oil level and pressure in the pressure oil tank, and prevents the pressure from exceeding the range and triggering the safety valve. This utility model's air replenishment device incorporates a parallel-designed electric air replenishment valve and a manual air replenishment valve. The manual valve can serve as a backup in case of electric valve failure. Combined with a pressure switch and a level switch installed in conjunction with a pressure oil tank, it ensures accurate signal acquisition, reduces malfunctions and frequent starts and stops of the air replenishment valve, lowers the risk of valve jamming, and improves the overall reliability of the system. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0014] In the attached diagram: Figure 1 A structural block diagram of an automatic air replenishment system for a pressure oil tank provided in this embodiment of the present utility model; Figure 2 This is a structural block diagram of the air replenishment device provided in an embodiment of the present utility model.

[0015] The above-mentioned attached drawings include the following reference numerals: 1. Pressure oil tank; 2. Return oil tank; 3. Oil pump group; 4. Air replenishment device; 41. Electric air replenishment valve; 42. Manual air replenishment valve; 43. Check valve; 44. Manual exhaust valve; 45. Silencer; 5. Air source; 6. Electrical control system; 7. Pressure switch; 8. Liquid level switch. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0018] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0019] like Figure 1 As shown, an automatic air replenishment system for a pressure oil tank is provided in one embodiment of the present invention, including an oil pressing device and an air replenishment device 4; The oil pressurization device includes a pressure oil tank 1, an oil pump set 3, a return oil tank 2, a supply system, and a system return pipeline. In this embodiment of the utility model, the oil outlet of the oil pump assembly 3 is connected to the pressure oil tank 1; the oil inlet of the oil pump assembly 3 is connected to the return oil tank 2; one end of the supply system is connected to the pressure oil tank 1; and one end of the system return pipeline is connected to the return oil tank 2. In this embodiment, hydraulic oil is replenished to pressure oil tank 1 by oil pump group 3 to maintain the basic pressure in the tank, realize the continuous power supply of external oil-using equipment of hydropower plant speed governor, ensure the stability of oil system pressure, and at the same time, oil return and recovery avoid oil waste and ensure the long-term circulation operation of oil system. Furthermore, such as Figure 1 and Figure 2 As shown, the gas replenishment device 4 provided in this embodiment includes an electric gas replenishment valve 41 and a check valve 43. The inlet end of the electric gas replenishment valve 41 is connected to the gas source 5, and the outlet end of the electric gas replenishment valve 41 is connected to the inlet end of the check valve 43. The outlet end of the check valve 43 is connected to the pressure oil tank 1. The check valve 43 is used to prevent the gas in the pressure oil tank 1 from flowing back to the gas source 5. In this embodiment, the electric air supply valve 41 is used to control the opening and closing of the air source 5. The check valve 43, through its one-way conduction structure, blocks the path of gas in the pressure tank 1 flowing back to the air source 5, thus solving the problem of gas leakage from the direction of the air path. This not only prevents gas in the pressure tank 1 from flowing back to the air source 5 after the air supply valve is closed, thus preventing pressure loss in the tank, but also prevents the air source 5 from accidentally supplying excessive air to the tank, ensuring the balance of oil level and pressure in the pressure tank 1 and avoiding abnormal pressure fluctuations. Furthermore, the automatic air replenishment system for the pressure oil tank in this embodiment also includes a sensing module, a pressure switch 7 and a level switch 8. Both the pressure switch 7 and the level switch 8 are installed in conjunction with the pressure oil tank 1, and both the pressure switch 7 and the level switch 8 are electrically connected to the electrical control system 6. The pressure switch 7 collects the pressure signal in the pressure oil tank 1 in real time, and the level switch 8 collects the oil level signal in the pressure oil tank 1 in real time. Both transmit the signals to the electrical control system 6 to provide a basis for judging the start and stop of the air replenishment valve. Specifically, in this embodiment, the gas replenishment device 4 is electrically connected to the electronic control system 6, and the gas replenishment device 4 is controlled by the electronic control system 6 to start and stop; the control logic of the electronic control system 6 is as follows: When the oil level signal collected by the level switch 8 reaches the gas replenishment start potential energy in the gas replenishment potential energy threshold, and the pressure signal collected by the pressure switch 7 reaches the preset gas replenishment start pressure threshold, the gas replenishment device 4 is controlled to open and replenish gas to the pressure oil tank 1; when the oil level signal collected by the level switch 8 drops to the gas replenishment stop potential energy in the gas replenishment potential energy threshold, and the pressure signal collected by the pressure switch 7 reaches the preset gas replenishment stop pressure threshold, the gas replenishment device 4 is controlled to close and stop gas replenishment.

[0020] Furthermore, in this embodiment of the present invention, the air replenishment device 4 also includes a manual air replenishment valve 42, which is connected in parallel with an electric air replenishment valve 41. The air inlet of both the manual air replenishment valve 42 and the electric air replenishment valve 41 is connected to the air source 5, and the air outlet of both the manual air replenishment valve 42 and the electric air replenishment valve 41 is connected to the air inlet of the check valve 43. Under normal operating conditions, the electric air replenishment valve 41 automatically replenishes air. When the electric air replenishment valve 41 malfunctions (such as jamming or power failure), the manual air replenishment valve 42 can be manually opened to supply air to the pressure tank through the parallel air circuit, thereby forming a dual air replenishment guarantee, avoiding system stoppage and pressure loss control of the pressure tank 1 due to electric valve failure, and improving the reliability and fault tolerance of the air replenishment system.

[0021] Furthermore, the air replenishment device 4 also includes a silencer 45, which is installed at the outlet of the manual exhaust valve 44 and connected to the outlet of the manual exhaust valve 44 via a pipeline; the inlet of the manual exhaust valve 44 is connected to the exhaust port of the electric air replenishment valve 41; the silencer 45 absorbs sound wave energy and attenuates exhaust noise through its internal porous / resistive structure (such as sound-absorbing cotton and labyrinth-type air passage); the manual exhaust valve 44 can manually control the exhaust flow and flexibly adjust the exhaust timing, effectively reducing gas impact noise during the air replenishment / exhaust process and avoiding interference with the plant environment; at the same time, the manual exhaust valve 44 can provide emergency exhaust when the electric exhaust function fails, further improving the system's flexibility.

[0022] Furthermore, both the pressure switch 7 and the level switch 8 are installed on the tank wall of the pressure oil tank 1, and the pressure sensing end of the pressure switch 7 and the level sensing end of the level switch 8 extend into the interior of the pressure oil tank 1, with the sensing ends directly contacting the oil / gas medium inside the tank. This avoids signal delay or error caused by the tank wall obstruction, and allows for real-time acquisition of the actual pressure and oil level data inside the tank, which is then transmitted to the electronic control system. This ensures the accuracy of the acquired signals and provides a reliable basis for the electronic control system to determine the start and stop conditions for gas replenishment, reducing the problem of delayed or excessive gas replenishment caused by inaccurate signals.

[0023] Furthermore, the end of the supply system away from the pressure oil tank 1 is used to connect with the external oil-using equipment of the hydropower plant speed governor, and the end of the system return pipeline away from the return oil tank 2 is used to connect with the external oil-using equipment of the hydropower plant speed governor. The supply system delivers the pressurized oil in the pressure oil tank 1 to the equipment (to provide power to the equipment), and the oil used by the equipment flows back to the return oil tank through the system return pipeline to complete the oil circulation, ensuring that the external oil-using equipment continuously obtains stable pressure. At the same time, the returned oil is recycled and reused, reducing the maintenance cost of the oil system and extending the service life of the oil.

[0024] In summary, the one-way conduction of the check valve 43 in the gas replenishment device 4 of this utility model can block the backflow of gas in the pressure oil tank 1 to the gas source 5. Combined with the structure of the electric gas replenishment valve 41 and the manual gas replenishment valve 42, it can prevent gas leakage and movement after the valve is closed, solve the problem of pressure still slowly increasing after gas replenishment is stopped in the prior art, ensure the balance and stability of oil level and pressure in the pressure oil tank 1, and prevent the pressure from exceeding the range and triggering the safety valve. The gas replenishment device 4 of this utility model has an electric gas replenishment valve 41 and a manual gas replenishment valve 42 designed in parallel. The manual valve can be used as a backup when the electric valve fails. It is equipped with a pressure switch 7 and a level switch 8 installed in conjunction with the pressure oil tank 1 to ensure accurate signal acquisition, reduce the false operation and frequent start and stop of the gas replenishment valve, reduce the risk of valve jamming, and improve the overall reliability of the system.

[0025] The above solutions are merely illustrative examples of preferred embodiments, but are not limited thereto. When implementing this invention, appropriate substitutions and / or modifications can be made according to the user's needs.

[0026] The number of devices and processing scale described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of this utility model will be readily apparent to those skilled in the art.

[0027] Although embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. Other modifications can be readily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and examples shown and described herein.

Claims

1. An automatic air replenishment system for a pressure oil tank, characterized in that, include: The oil pressurizing device includes a pressure oil tank (1), an oil pump group (3), a return oil tank (2), a supply system, and a system return pipeline; the oil outlet of the oil pump group (3) is connected to the pressure oil tank (1); the oil inlet of the oil pump group (3) is connected to the return oil tank (2); one end of the supply system is connected to the pressure oil tank (1); and one end of the system return pipeline is connected to the return oil tank (2). The gas replenishment device (4) includes an electric gas replenishment valve (41) and a check valve (43). The inlet end of the electric gas replenishment valve (41) is connected to the gas source (5), and the outlet end of the electric gas replenishment valve (41) is connected to the inlet end of the check valve (43). The outlet end of the check valve (43) is connected to the pressure oil tank (1). The check valve (43) is used to prevent the gas in the pressure oil tank (1) from flowing back to the gas source (5).

2. The automatic air replenishment system for pressure oil tanks according to claim 1, characterized in that, It also includes a sensing module, a pressure switch (7) and a level switch (8) in the sensing module. The pressure switch (7) and the level switch (8) are both installed in conjunction with the pressure tank (1), and the pressure switch (7) and the level switch (8) are both electrically connected to the electrical control system (6).

3. The automatic air replenishment system for pressure oil tanks according to claim 2, characterized in that, The air replenishment device (4) also includes a manual air replenishment valve (42), which is connected in parallel with an electric air replenishment valve (41). The air inlet of the manual air replenishment valve (42) and the air inlet of the electric air replenishment valve (41) are both connected to the air source (5), and the air outlet of the manual air replenishment valve (42) and the air outlet of the electric air replenishment valve (41) are both connected to the air inlet of the check valve (43).

4. The automatic air replenishment system for pressure oil tanks according to claim 3, characterized in that, The air replenishment device (4) also includes a muffler (45), which is installed at the outlet of the manual exhaust valve (44). The muffler (45) is connected to the outlet of the manual exhaust valve (44) through a pipeline. The inlet of the manual exhaust valve (44) is connected to the exhaust port of the electric air replenishment valve (41).

5. The automatic air replenishment system for pressure oil tanks according to claim 4, characterized in that, The pressure switch (7) and the level switch (8) are both installed on the tank wall of the pressure oil tank (1). The pressure sensing end of the pressure switch (7) and the level sensing end of the level switch (8) extend into the interior of the pressure oil tank (1).

6. The automatic air replenishment system for pressure oil tanks according to claim 5, characterized in that, The end of the supply system away from the pressure oil tank (1) is used to connect with the external oil-using equipment of the hydropower plant speed governor, and the end of the system return pipeline away from the return oil tank (2) is used to connect with the external oil-using equipment of the hydropower plant speed governor.

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