Vacuum control liquid level adjusting pipeline of vacuum oil filter

Abstract

The utility model belongs to the technical field of vacuum oil filter equipment, and relates to a vacuum control liquid level adjusting pipeline of a vacuum oil filter, which comprises an oil tank, a vacuum pipe arranged at the top of the oil tank, a vacuum pump arranged at the tail end of the vacuum pipe, and a vacuum control valve arranged on the vacuum pipe in a leading-out manner and electrically connected to a controller. An isolation baffle is arranged at the top end of the inner wall of the oil tank, an atomization sprayer is arranged in the oil tank, a liquid level probe is arranged on the side wall of the oil tank, a fire-resistant oil inlet pipe is arranged on one side of the top of the oil tank, an inlet pipe valve is arranged on the fire-resistant oil inlet pipe, a fire-resistant oil outlet pipe is arranged on one side of the bottom of the oil tank, and an outlet pipe valve is arranged on the fire-resistant oil outlet pipe. A one-way valve is arranged on the fire-resistant oil outlet pipe, and an acid value measuring device and a moisture measuring device are arranged on the fire-resistant oil outlet pipe. Contact between air and fire-resistant oil is reduced, moisture absorption is inhibited, the acid value is stabilized within the standard range, the fire-resistant oil replacement period is prolonged, the equipment safety is improved, and the shutdown risk caused by abnormal oil level is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of vacuum oil filtration equipment, specifically relating to a vacuum control liquid level adjustment pipeline for a vacuum oil filtration machine. Background Technology

[0002] Fire-resistant oils, such as phosphate ester-type high-pressure fire-resistant oils, are used as media in the electro-hydraulic conditioning systems of thermal power generating units. Their cleanliness directly impacts the safe operation of the unit. Traditional vacuum oil filters place the vacuum control valve at the fire-resistant oil inlet during operation. To maintain the target vacuum level inside the tank, the valve must remain at a constant opening, leading to continuous infiltration of external air and causing problems such as moisture adsorption and bubble formation.

[0003] When water vapor in the air comes into contact with fire-resistant oil, its moisture content exceeds the limit. In turbulent conditions, gas mixes with the oil, forming a foam layer, causing false level signals and triggering violent level fluctuations. Moisture intrusion induces hydrolysis of the fire-resistant oil, leading to a sharp increase in acid value. Acid corrosion can damage precision hydraulic components, and operators need to adjust the inlet / outlet valves in real time to stabilize the level, increasing labor costs.

[0004] The industry has attempted to improve the system by shifting the vacuum valve away from the oil inlet, but this has not solved the problem of pressure imbalance inside the tank. The vacuum level still fluctuates by ±10%. Moreover, even if antioxidants are added, they only slow down the rate of acid value increase, cannot completely eliminate moisture intrusion, and introduce the risk of chemical contamination.

[0005] In summary, there is an urgent need for an oil filter structure that can simultaneously address vacuum stability, moisture isolation, and acid value control, thereby fundamentally breaking through the industry's technological bottlenecks. Utility Model Content

[0006] The purpose of this invention is to provide a vacuum control liquid level adjustment pipeline for a vacuum oil filter, which solves the problems of excessive moisture, increased acid value, and high labor costs caused by fire-resistant oil coming into contact with air, thereby extending the service life of the fire-resistant oil and achieving safe operation.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a vacuum control liquid level adjustment pipeline for a vacuum oil filter, including an oil tank, an atomizing sprayer installed inside the oil tank, a vacuum tube installed at the top of the oil tank, a vacuum pump installed at the end of the vacuum tube, a vacuum control valve leading out from the vacuum tube, the vacuum control valve being electrically connected to a controller, an isolation baffle installed at the top of the inner wall of the oil tank, multiple pressure equalization through holes evenly opened on the isolation baffle, a liquid level probe installed on the side wall of the oil tank, the liquid level probe being electrically connected to the controller, a fire-resistant oil inlet pipe installed on one side of the top of the oil tank, an inlet valve installed on the fire-resistant oil inlet pipe, and a fire-resistant oil outlet pipe installed on one side of the bottom of the oil tank, an outlet valve and a one-way valve installed on the fire-resistant oil outlet pipe.

[0008] Preferably, the liquid level probes are arranged in two vertically spaced intervals along the side wall of the oil tank, respectively detecting high and low liquid level thresholds.

[0009] Preferably, the fire-resistant oil outlet pipe is equipped with an acid value tester and a moisture tester, both of which are electrically connected to the controller.

[0010] Preferably, the liquid level probe is an RF admittance sensor and the controller is a programmable logic controller.

[0011] Preferably, the vacuum control valve is an electric regulating valve, and the opening signal of the vacuum control valve is connected to the controller.

[0012] Preferably, the isolation baffle is located on the inner wall of the oil tank between the inlet of the fire-resistant oil inlet pipe and the inlet of the vacuum pipe, and the isolation baffle is made of stainless steel.

[0013] Preferably, the diameter of the pressure equalization through hole is 3-5 mm, and the surface of the isolation baffle is covered with an oleophobic coating, which is a polytetrafluoroethylene coating with a thickness of 20-50 μm.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] 1. This utility model reduces the contact between air and fire-resistant oil, inhibits moisture absorption, stabilizes the acid value within the standard range, extends the replacement cycle of fire-resistant oil, improves equipment safety, and avoids the risk of downtime due to abnormal oil level.

[0016] 2. This utility model solves the problems of excessive moisture, increased acid value, and high labor costs caused by fire-resistant oil coming into contact with air, thus extending the service life of fire-resistant oil and achieving safe operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a vacuum control liquid level regulating pipeline for a vacuum oil filter according to one embodiment;

[0019] In the above diagram, 1. Oil tank, 2. Vacuum tube, 3. Vacuum pump, 4. Vacuum control valve, 5. Controller, 6. Isolation baffle, 7. Liquid level probe, 8. Fire-resistant oil inlet pipe, 9. Inlet pipe valve, 10. Fire-resistant oil outlet pipe, 11. Outlet pipe valve, 12. Check valve, 13. Acid value tester, 14. Moisture tester, 15. Atomizing sprayer. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Example 1, such as Figure 1 As shown, a vacuum control liquid level adjustment pipeline for a vacuum oil filter includes an oil tank 1. An atomizing sprayer 15 is installed inside the oil tank 1. The atomizing sprayer 15 disperses the incoming oil into oil droplets, increasing the oil-gas contact area and improving vacuum degassing efficiency. A vacuum pipe 2 is installed at the top of the oil tank 1, and a vacuum pump 3 is installed at the end of the vacuum pipe 2. A vacuum control valve 4 is led out from the vacuum pipe 2 and electrically connected to a controller 5. An isolation baffle 6 is installed at the top of the inner wall of the oil tank 1, physically isolating the fire-resistant oil inlet pipe 8 from the vacuum pipe 2. Multiple pressure equalization holes are evenly distributed on the isolation baffle 6 to maintain pressure balance within the tank.

[0023] A liquid level probe 7 is installed on the side wall of oil tank 1. The liquid level probe 7 is electrically connected to the controller 5. A fire-resistant oil inlet pipe 8 is installed on one side of the top of oil tank 1. An inlet valve 9 is installed on the fire-resistant oil inlet pipe 8. A fire-resistant oil outlet pipe 10 is installed on one side of the bottom of oil tank 1. An outlet valve 11 and a check valve 12 are installed on the fire-resistant oil outlet pipe 10. The check valve 12 prevents oil backflow and avoids external contaminants from entering the tank body in reverse.

[0024] The controller 5 dynamically adjusts the opening of the vacuum control valve 4 based on the signal from the liquid level probe 7, replacing the traditional constant opening mode. This precisely controls the vacuum level inside the tank, reducing vacuum fluctuations from ±10% to ±2%, preventing gas mixing caused by pressure imbalance, reducing continuous air infiltration, and blocking water vapor from contacting the fire-resistant oil at the source.

[0025] The specific design of the aforementioned key components will be discussed in detail below:

[0026] Two level probes 7 are arranged vertically at intervals along the side wall of oil tank 1, respectively detecting high and low level thresholds. Each level probe 7 is a radio frequency admittance sensor, and the controller 5 is a programmable logic controller (PLC). The controller 5 sets upper and lower level thresholds, for example, 400±50mm. If the level exceeds these limits, the oil filter automatically starts or stops, or an alarm is triggered. The radio frequency admittance level probes 7 detect the high / low level thresholds and transmit signals to the controller 5 in real time. The radio frequency admittance technology penetrates the foam layer to detect the true level, eliminating false signals and triggering the inlet valve 9 and outlet valve 11 to achieve closed-loop level regulation.

[0027] An acid value tester 13 and a moisture content tester 14 are installed on the fire-resistant oil outlet pipe 10. Both the acid value tester 13 and the moisture content tester 14 are electrically connected to the controller 5. The acid value tester 13 and the moisture content tester 14 monitor the acid value and water content of the fire-resistant oil in the outlet pipe online. When the moisture content exceeds the limit or the acid value is abnormal, the machine will automatically stop to prevent acid corrosion of hydraulic components, ensure that the oil meets the DL / T571 standard, and extend the replacement cycle.

[0028] The vacuum control valve 4 is an electric regulating valve, and the opening signal of the vacuum control valve 4 is connected to the controller 5.

[0029] The isolation baffle 6 is located on the inner wall of the oil tank 1, between the inlet of the fire-resistant oil inlet pipe 8 and the inlet of the vacuum pipe 2. The isolation baffle 6 is made of stainless steel. The pressure equalization through-hole has a diameter of 3-5 mm, and the surface of the isolation baffle 6 is covered with an oleophobic coating, which is a polytetrafluoroethylene (PTFE) coating with a thickness of 20-50 μm. The stainless steel baffle and PTFE oleophobic coating prevent oil mist from entering the vacuum pipe 2, protecting the vacuum pump 3. The pressure equalization through-hole eliminates local low-pressure areas, inhibits bubble formation, blocks the moisture adsorption path, and keeps the acid value stable below the industry standard limit.

[0030] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A vacuum control liquid level adjusting pipeline of a vacuum oil filter, comprising an oil tank, an atomizing sprayer arranged in the oil tank, a vacuum pipe arranged at the top of the oil tank, a vacuum pump arranged at the end of the vacuum pipe, and a vacuum control valve arranged on the vacuum pipe, characterized in that, The vacuum control valve is electrically connected to the controller. An isolation baffle is provided at the top of the inner wall of the oil tank. Multiple pressure equalization holes are evenly opened on the isolation baffle. A liquid level probe is provided on the side wall of the oil tank. The liquid level probe is electrically connected to the controller. A fire-resistant oil inlet pipe is provided on one side of the top of the oil tank. An inlet valve is provided on the fire-resistant oil inlet pipe. A fire-resistant oil outlet pipe is provided on one side of the bottom of the oil tank. An outlet valve and a check valve are provided on the fire-resistant oil outlet pipe.

2. A vacuum control liquid level regulating line for a vacuum oil filter according to claim 1, wherein The liquid level probes consist of two vertically spaced probes arranged along the side wall of the oil tank, which are used to detect high and low liquid level thresholds respectively.

3. A vacuum control liquid level regulating line for a vacuum oil filter according to claim 1, wherein The fire-resistant oil outlet pipe is equipped with an acid value tester and a moisture tester, both of which are electrically connected to the controller.

4. A vacuum control liquid level regulating line for a vacuum oil filter according to claim 2, wherein The liquid level probe is an RF admittance sensor, and the controller is a programmable logic controller.

5. A vacuum control liquid level regulating line for a vacuum oil filter according to claim 1, wherein The vacuum control valve is an electrically adjustable valve, and the opening signal of the vacuum control valve is connected to the controller.

6. A vacuum control level regulating line for a vacuum oil filter according to claim 1, wherein The isolation baffle is located on the inner wall of the oil tank, between the inlet of the fire-resistant oil inlet pipe and the inlet of the vacuum pipe, and the isolation baffle is made of stainless steel.

7. A vacuum control level regulating line for a vacuum oil filter according to claim 1, wherein The pressure equalization through hole has a diameter of 3-5mm, and the surface of the isolation baffle is covered with an oleophobic coating, which is a polytetrafluoroethylene coating with a thickness of 20-50μm.

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