Fuel station system and lubrication system

Abstract

The embodiment of the specification relates to an oil circuit system and a lubricating system, and the oil station system comprises an oil tank and an oil outlet, lubricating oil in the oil tank is transmitted to the oil outlet through an oil pipeline, an adjusting valve is arranged on the oil pipeline, an accumulator is arranged on the oil pipeline close to one end of the oil outlet and is configured to store a residual amount of lubricating oil, a detection unit is arranged on the oil pipeline close to one end of the oil outlet and is electrically connected with a control unit, is used for detecting pressure in the oil pipeline and transmitting a detected pressure signal to the control unit, and the control unit is electrically connected with the adjusting valve and is configured to control the opening degree of the adjusting valve based on the pressure signal. The detection unit arranged near the oil outlet is used for monitoring the pressure signal in real time, and the adjusting valve upstream is controlled in linkage. Meanwhile, through mechanical coupling of the adjusting valve and the accumulator, a pure mechanical pressure buffer and active compensation not dependent on external power are provided in a power swing moment, and critical pressure maintenance time is obtained for the system.

Description

Technical Field

[0001] This specification relates to the field of thermal technology, and in particular to an oil station system and a lubrication system. Background Technology In highly continuous process industries such as thermal power generation, the stable operation of boiler induced draft fans is crucial to ensuring the safety of the entire production line. The induced draft fans rely on a dedicated oil station system to provide a continuous and stable supply of lubricating oil to maintain the safety of the motor and bearings. This system incorporates a core safety interlock logic: when the oil supply pressure in the oil station system drops below 0.1 MPa for any reason, a "major fault" signal is triggered, directly interlocking and tripping the corresponding induced draft fan to prevent equipment damage due to lubrication failure.

[0002] However, the phenomenon of "voltage dips" (i.e., voltage sags) that are difficult to completely avoid in power grid operation poses a serious threat. Although the duration of a voltage dip is short (usually a few milliseconds to a few seconds), it is enough to cause the main working pump of the oil station system to stop, resulting in a sudden and sharp drop in oil pressure. Existing conventional technical solutions, such as configuring an uninterruptible power supply (UPS) for the control system, can ensure the power supply to the instruments in the control cabinet, but cannot solve the problem of power loss of the main oil pump in the power circuit, nor can they prevent the hard interlock shutdown triggered by the drop in oil pressure. Once a trip occurs, even if the grid voltage recovers instantly, manual intervention is required to troubleshoot and reset before restarting, resulting in production interruption and causing huge economic losses and safety risks.

[0003] Currently, research on power fluctuations, both domestically and internationally, largely focuses on the power system itself or the interference immunity of individual devices. However, in the specific scenario of a gas station system, there is a lack of an integrated solution that can combine mechanical, electrical, and instrumentation control. Existing technologies, when resisting power fluctuations, exhibit disjointed responses from various subsystems, ultimately leading to uncontrollable interlocking shutdowns. Therefore, developing a power fluctuation-resistant gas station system that enhances the resilience of industrial production is an urgent problem to be solved. Utility Model Content

[0004] This manual provides an anti-power-slip gas station system to address the issue of uncontrolled interlocking shutdowns caused by disjointed responses in various subsystems, thereby enhancing the resilience of industrial production.

[0005] The gas station system disclosed in the embodiments of this specification includes: An oil tank and an oil outlet, wherein the lubricating oil in the oil tank is transferred to the oil outlet through an oil pipeline; A regulating valve is installed on the oil pipeline; An accumulator, located on the oil pipeline near the oil outlet, is configured to store a remaining amount of lubricating oil. The detection unit is installed on the oil pipeline near the oil outlet and is electrically connected to the control unit. It is used to detect the pressure in the oil pipeline and transmit the detected pressure signal to the control unit. The control unit is electrically connected to the regulating valve and is configured to control the opening degree of the regulating valve based on the pressure signal.

[0006] In one embodiment, the detection unit includes at least two pressure transmitters.

[0007] In one embodiment, the regulating valve is a self-regulating regulating valve.

[0008] In one embodiment, the system further includes an oil pump located on the oil pipeline, the oil pump being situated between the oil tank and the regulating valve and near one end of the oil tank.

[0009] In one embodiment, the system further includes a temperature detection unit electrically connected to the control unit; the control unit is further configured to control the start / stop or operating frequency of the oil pump based on the temperature signal from the temperature detection unit.

[0010] In one embodiment, the system further includes a filter disposed on the oil pipeline, the filter being configured to filter lubricating oil flowing toward the oil outlet.

[0011] In one embodiment, the system further includes a cooler disposed on the oil pipeline and having a cooling water inlet and a cooling water outlet, wherein the cooling water in the cooler is configured to cool the lubricating oil flowing toward the oil outlet.

[0012] In one embodiment, the system further includes an oil return port, with one end of the oil-using device connected to the oil outlet and the other end connected to the oil return port. The lubricating oil enters the oil-using device through the oil outlet to lubricate the various components of the oil-using device, and flows back to the oil tank from the oil-using device through the oil return port.

[0013] In one embodiment, the oil pump includes a main oil pump and a standby oil pump, the motors of the main oil pump and the standby oil pump are each controlled by an independent contactor, the contactor being electrically connected to the control unit; the control unit is configured to control the start, stop and switching of the oil pump based on the pressure signal and the liquid level in the oil tank.

[0014] In one embodiment, the main oil pump and the standby oil pump are each equipped with a switch, which is configured to switch the control modes of the main oil pump and the standby oil pump in response to a signal from the control unit. The control modes include an active control mode, a manual control mode, and an auxiliary control mode.

[0015] In one embodiment, the main oil pump and the standby oil pump are each equipped with an intermediate relay, which is configured to control the start and stop of the main oil pump and the standby oil pump respectively in response to a signal from the control unit.

[0016] In one embodiment, the gas station system further includes a power module powered by an uninterruptible power supply.

[0017] The lubrication system disclosed in the embodiments of this specification includes: The oil-using equipment and the oil station system described in any of the above embodiments are provided, wherein the oil-using equipment is connected to the oil outlet and oil return port of the oil station system.

[0018] One beneficial effect of the disclosed gas station system is that by using a detection unit located near the oil outlet to monitor pressure signals in real time and linking it with the upstream regulating valve, a closed-loop pressure regulation system with rapid response and precise control is formed, achieving a leap from "passive pressure relief" to "active pressure stabilization". Simultaneously, through the mechanical coupling of the regulating valve and the accumulator, a purely mechanical pressure buffer and active compensation is provided during power fluctuations without relying on external power, gaining crucial pressure maintenance time for the system. Specifically, placing the accumulator near the oil outlet allows it to compensate for pressure fluctuations at this critical node most directly and quickly, playing the immediate buffering role of the "first line of defense". More importantly, the control system can dynamically and precisely adjust the opening of the regulating valve based on the actual pressure feedback from the oil outlet, finely regulating the oil pressure from the source (upstream). This collaborative architecture of "end-point monitoring, source control, and accumulator buffering" is particularly suitable for dealing with unstable oil pump supply caused by "power fluctuations" and other operating conditions. It can effectively suppress the sharp drop in oil pressure and maintain the system pressure above a safe threshold, thereby avoiding equipment interlock shutdowns triggered by low oil pressure and greatly ensuring the continuity of production and the safety of equipment operation. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0020] Figure 1 This is a structural block diagram of the gas station system of this disclosure provided in Embodiment 1; Figure 2 These are structural block diagrams of the gas station system disclosed herein provided in Embodiments 2 and 3; Figure 3 This is a circuit diagram of a gas station system provided in Embodiment 4 of this disclosure; Figure 4 This is the status monitoring and fault control loop diagram of the gas station system of this disclosure provided in Embodiment 4; Figure 5 This is the contact opening and closing table of each oil pump of the present disclosure under different control modes provided in Embodiment 4; Figure 6 This is the signal and alarm control loop diagram of the gas station system disclosed in Embodiment 4.

[0021] Figures 1 to 6 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows: 1. Oil tank; 2. Oil outlet; 3. Regulating valve: 31. Self-regulating valve; 4. Accumulator; 5. Detection unit; 51. Pressure transmitter; 6. Control unit; 7. Oil pump; 71. Main oil pump; 72. Backup oil pump; 8. Filter; 9. Cooler; 10. Oil return port; 11. Temperature detection unit. Detailed Implementation

[0022] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0023] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0026] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0027] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0028] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0029] As described in the background section, existing gas station systems suffer from disjointed subsystem responses, leading to uncontrollable interlocking shutdowns. Therefore, this disclosure provides a gas station system. For ease of understanding, the following description... Figures 1 to 6The specific structure and working principle of the gas station system disclosed herein will be described in detail with reference to several embodiments.

[0030] It should be noted that the gas station system disclosed herein can be extended to units containing gas station systems in various industries such as research institutions, corporate R&D centers, coal chemical and petrochemical industries, depending on user requirements and applications. In particular, it is suitable for providing lubricating oil to oil-using equipment.

[0031] Additionally, it should be noted that, Figure 1 The "straight line with arrows" indicates the direction of lubricant flow. Furthermore, the relative positions of the components described below use the directional terms "upstream" and "downstream," which are based on the direction of lubricant flow. For the same portion of lubricant, the area it flows through first is considered upstream, and the area it flows through later is considered downstream.

[0032] Example 1 See Figure 1 In this embodiment, the gas station system disclosed herein includes a fuel tank 1, an oil outlet 2, a regulating valve 3, an accumulator 4, a detection unit 5, and a control unit 6.

[0033] In this system, lubricating oil in oil tank 1 is transmitted to oil outlet 2 via an oil supply pipeline. A regulating valve 3 is installed on the oil supply pipeline. An accumulator 4 is installed on the oil supply pipeline near one end of the oil outlet 2 and is configured to store the remaining lubricating oil. A detection unit 5 is installed on the oil supply pipeline near one end of the oil outlet 2 and is electrically connected to a control unit 6. It is used to detect the pressure in the oil supply pipeline and transmit the detected pressure signal to the control unit 6. The control unit 6 is electrically connected to the regulating valve 3 and is configured to control the opening degree of the regulating valve 3 based on the pressure signal.

[0034] The working process of the above gas station system is as follows: During normal system operation, detection unit 5 continuously monitors the pressure or temperature signal of the oil pipeline near oil outlet 2 and transmits the pressure or temperature signal to control unit 6. Control unit 6 compares the received pressure signal value with a preset target pressure range or the temperature signal value with a preset target temperature range, and controls the corresponding components of the oil station system to adjust the pressure or temperature based on the comparison results. When a downward pressure trend is detected or the pressure falls below the target range (for example, due to fluctuations in the speed of the main oil pump 71 caused by electrical sloshing), control unit 6 immediately sends a control command to regulating valve 3 to increase its opening to reduce flow resistance, thereby increasing the total oil supply of the downstream pipeline and preventing further pressure drop.

[0035] Meanwhile, the accumulator 4, located near the oil outlet 2, rapidly releases the remaining lubricating oil stored inside into the pipeline, providing the most direct and rapid pressure compensation and jointly maintaining the stability of the pressure at the oil outlet 2. In specific implementation, the lubricating oil can be released into the pipeline by filling the accumulator 4 with nitrogen.

[0036] Similarly, when the system pressure returns to normal or becomes too high, the control unit 6 instructs the regulating valve 3 to reduce its opening to balance the system pressure and avoid unnecessary energy loss. At this time, excess lubricating oil will partially flow back and replenish the accumulator 4, preparing for the next pressure fluctuation.

[0037] Clearly, through the above process, the detection unit 5, located near the oil outlet 2, monitors the critical pressure status in real time and controls the upstream regulating valve 3 in conjunction with it, forming a rapidly responsive and precisely controlled closed-loop pressure regulation system. This achieves a leap from "passive pressure relief" to "active pressure stabilization." Simultaneously, through the mechanical coupling of the regulating valve 3 and the accumulator 4, a purely mechanical pressure buffer and active compensation, independent of external power, is provided during power fluctuations, buying the system crucial pressure maintenance time. Specifically, placing the accumulator 4 near the oil outlet 2 allows it to compensate for pressure fluctuations at this critical point most directly and quickly, playing the immediate buffering role of the "first line of defense." More importantly, the control system can dynamically and precisely adjust the opening of the regulating valve 3 based on the actual pressure feedback from the oil outlet 2, finely regulating the oil pressure from the source (upstream). This collaborative architecture of "end-point monitoring, source control, and accumulator 4 acting as a buffer" is particularly suitable for dealing with unstable oil supply from pump 7 caused by conditions such as power fluctuations. It can effectively suppress sharp drops in oil pressure, maintaining the system pressure above a safe threshold, thereby avoiding equipment interlock shutdowns triggered by excessively low oil pressure and greatly ensuring production continuity and equipment operation safety. The system achieves real-time, closed-loop, and automatic adjustment of the pressure at oil outlet 2, forming a collaborative working system of end-point monitoring, intelligent decision-making, source adjustment, and instantaneous buffering, effectively ensuring the stability of the oil supply pressure.

[0038] It should be noted that when the detection unit 5 of this disclosure detects a pressure below 0.1 MPa, the gas station system's major fault interlocking induced draft fan trips. Therefore, the pre-set target pressure range should be set at 0.1 MPa or above. Those skilled in the art can set specific values ​​or ranges for the upper pressure limit based on actual application scenarios, and this document does not impose any limitations on this.

[0039] In detail, in this embodiment, the detection unit 5 of this disclosure includes at least two pressure transmitters 51. That is, at least two pressure transmitters 51 are installed on the oil pipeline near the oil outlet 2 to detect the pressure of the oil pipeline.

[0040] In addition, in this embodiment, the regulating valve 3 disclosed herein is a self-operated regulating valve 31. Its working principle is that it is a regulating valve 3 that does not require an external power source (such as a power supply or air source). It utilizes the energy of the regulated medium itself (such as changes in fluid pressure or temperature) as power, and automatically performs the regulating function through a preset mechanism, keeping the controlled parameters (pressure, temperature, flow rate) within a set range. Its working principle is based on the principle of force balance. Taking the most common downstream self-operated pressure regulating valve 3 as an example: when the downstream pressure reaches the set value, the pressure acting below the diaphragm is equal to the downward force of the set spring, and the valve core remains at a certain opening, maintaining system balance. When the pressure is too high, if the downstream pressure increases for some reason, this pressure will be transmitted to the area below the diaphragm through the pressure tapping pipe. At this time, the force below the diaphragm is greater than the spring force, pushing the diaphragm upward and causing the valve stem and valve core to move in the closing direction. This closes the valve, reduces the flow rate, and thus lowers the downstream pressure, returning it to the set value. When the pressure is too low, if the pressure downstream of the valve decreases, the force below the diaphragm is less than the spring force. The diaphragm moves downwards under the spring's action, causing the valve core to move in the opening direction. This opens the valve wider, increasing the flow rate, thereby causing the downstream pressure to rise back to the set value.

[0041] The self-regulating valve 31 requires no electricity or compressed air, saving energy and associated costs. It provides coarse adjustments to stabilize pressure when fluctuations occur in the gas station system. Furthermore, being explosion-proof and requiring no electricity, it is suitable for flammable and explosive environments. However, when the pressure or flow rate of the medium varies significantly, the self-regulating valve 31 may exceed its self-regulating capacity. Therefore, the detection unit 5, control unit 6, and regulating valve 3 are required to work together to stabilize the pressure.

[0042] In this embodiment, the accumulator 4 disclosed herein can use 100L of solvent, with a cylinder diameter of 299mm and a length of 2254mm. The cylinder material is S30408, the air bladder material is rubber, the temperature is maintained between -40 and 70 degrees Celsius, the working pressure (MPa / bar) is 1.6 MPa / 0.4 MPa, the minimum working pressure is 0.15 MPa, the inflation pressure is 0.12 MPa, and the working temperature is maintained at 40 degrees Celsius. Of course, those skilled in the art can set specific values ​​or ranges according to actual application scenarios, and this document does not limit them.

[0043] Example 2 See Figure 2 In this embodiment, the oil station system disclosed herein includes an oil tank 1, an oil outlet 2, a regulating valve 3, an accumulator 4, a detection unit 5, a control unit 6, an oil pump 7, a filter 8, a cooler 9, and an oil return port 10.

[0044] The lubricating oil in the oil tank 1 is transmitted to the oil outlet 2 via an oil delivery pipeline; a regulating valve 3 is installed on the oil delivery pipeline; an accumulator 4 is installed on the oil delivery pipeline near the oil outlet 2 and is configured to store the remaining lubricating oil; a detection unit 5 is installed on the oil delivery pipeline near the oil outlet 2 and is electrically connected to a control unit 6, used to detect the pressure in the oil delivery pipeline and transmit the detected pressure signal to the control unit 6; the control unit 6 is electrically connected to the regulating valve 3 and is configured to control the opening degree of the regulating valve 3 based on the pressure signal; an oil pump 7 is installed on the oil delivery pipeline and located at the oil outlet 2. A filter 8 is located between the tank 1 and the regulating valve 3 and near one end of the oil tank 1; a filter 8 is located on the oil pipeline and is configured to filter the lubricating oil flowing to the oil outlet 2; a cooler 9 is located on the oil pipeline and has a cooling water inlet and a cooling water outlet, the cooling water in the cooler 9 is configured to cool the lubricating oil flowing to the oil outlet 2; one end of the oil-using device is connected to the oil outlet 2 and the other end is connected to the oil return port 10, the lubricating oil enters the oil-using device through the oil outlet 2 to lubricate the various components of the oil-using device, and flows back to the oil tank 1 from the oil-using device through the oil return port 10.

[0045] The working process of the above gas station system is as follows: After the system starts, oil pump 7 draws lubricating oil from oil tank 1 to establish the system's basic oil pressure. The lubricating oil then flows sequentially through filter 8 and cooler 9, where impurities are removed and the temperature is precisely controlled, ensuring that the supplied lubricating oil is clean and at a suitable temperature.

[0046] The pre-treated lubricating oil flows to the regulating valve 3. At this time, the detection unit 5, located on the pipeline near the oil outlet 2, monitors the pressure and temperature of the lubricating oil about to enter the oil-using equipment in real time, and transmits these pressure and temperature signals to the control unit 6. The control unit 6, acting as the system's brain, compares the real-time pressure with the set target pressure range and dynamically sends commands to the regulating valve 3 to adjust its opening: when the pressure is too low, it increases the opening to increase the oil supply; when the pressure is too high, it decreases the opening to balance the system. Simultaneously, the accumulator 4, connected in parallel to the oil outlet pipeline, acts as the system's "pressure stabilizer," storing some oil when the pressure is high and quickly releasing the stored excess lubricating oil when the pressure drops sharply, providing immediate compensation for pressure fluctuations.

[0047] Finally, lubricating oil with stable pressure, clean quality, and suitable temperature is delivered to the lubrication-using equipment (such as the bearing of an induced draft fan) through the oil outlet 2 for lubrication and cooling. After completing its lubrication task, the lubricating oil returns to the oil tank 1 through the oil return port 10 under the action of gravity or residual pressure, thus forming a complete, closed-loop, and intelligent lubrication cycle from oil supply, regulation, use to recycling.

[0048] This system achieves precise closed-loop control of the pressure at the oil outlet 2 through the coordinated operation of detection, control, and actuation components. Combined with the buffering effect of the accumulator 4, it can effectively resist pressure disturbances caused by operating conditions such as "electrical fluctuations" and ensure continuous and reliable lubrication.

[0049] Obviously, compared with Embodiment 1, this embodiment provides an oil pump 7, a filter 8, and a cooler 9 before delivering the lubricating oil to the oil outlet 2, thereby ensuring that the lubricating oil with stable pressure, clean quality, and suitable temperature enters the oil-using equipment.

[0050] Of course, Embodiment 2 has all the technical effects of Embodiment 1, and those skilled in the art can fully implement and connect it based on the description of Embodiment 1, which will not be repeated here.

[0051] In this embodiment, the filter disclosed herein maintains the cleanliness of the lubricating oil by filtering impurities, preventing impurities from entering precision components such as bearings of the oil-using equipment and causing wear to the equipment. The filter is equipped with a differential pressure switch ΔSP, which is used to detect the pressure difference before and after the filter. When the pressure difference is too large, a signal is issued to prompt the replacement of the filter element.

[0052] In addition, in this embodiment, the detection unit 5 of this disclosure includes a temperature detection unit 11 electrically connected to the control unit 6; the control unit 6 is also configured to control the start / stop or operating frequency of the oil pump 7 based on the temperature signal of the temperature detection unit 11.

[0053] Specifically, the temperature detection unit 11 is installed at a key heat exchange node, which can be located on the oil pipeline downstream of the cooler 9. It directly monitors the temperature of the lubricating oil after cooling and transmits the real-time temperature signal to the control unit 6. When the system starts up or the ambient temperature is low, if the oil temperature is detected to be below a preset minimum operating threshold, the control unit 6 will execute protective logic. This can prevent the oil pump 7 from starting or operate it at a very low frequency, and may also trigger an external heating system to prevent pump overload and poor equipment lubrication due to excessive lubricating oil viscosity. During normal operation, the control unit 6 compares the real-time oil temperature with an ideal target temperature range. When the oil temperature is too high and close to the upper limit, the control unit 6 can increase the operating frequency of the oil pump 7, thereby increasing the lubricating oil circulation flow rate to enhance the heat exchange effect of the cooler 9, thus achieving active and efficient cooling.

[0054] Of course, during this process, the cooler 9 can both cool and heat the lubricating oil. The cooler 9 has a cooling water inlet and a cooling water outlet. This cooling water circuit can be connected to an external water source with temperature regulation function (such as a combination system of a closed-loop cooling tower and a heating device), or the water temperature flowing into the cooler 9 can be precisely controlled by equipping it with components such as a three-way regulating valve 3.

[0055] Based on this architecture, the cooler 9 can perform both cooling and heating functions during actual operation. When the temperature detection unit 11 detects that the lubricating oil temperature is too high, the control unit 6 can instruct the regulating system to introduce cooler water at a lower temperature into the cooler 9. At this time, the cooler 9, through efficient heat exchange, transfers excess heat from the lubricating oil to the cooling water and carries it away, achieving active cooling of the lubricating oil. Conversely, during system startup or when the ambient temperature is low, if the lubricating oil temperature is below the ideal operating range, the control unit 6 can switch the water circuit and introduce warm or hot water from an external heat source into the cooler 9. At this time, the heat exchange process inside the cooler 9 is reversed, and the flowing cooling water transfers heat to the lubricating oil, thereby achieving rapid and uniform preheating of the lubricating oil.

[0056] Through this design, the cooler 9 is no longer a single-function cooling component, but has been upgraded into an intelligent temperature control center integrating cooling and heating functions. It works in conjunction with the control unit 6, temperature detection unit 11, and oil pump 7 to ensure that the lubricating oil temperature is always precisely maintained within the optimal operating range. This not only ensures that oil-using equipment receives lubricating oil of suitable viscosity under various ambient temperatures, effectively preventing low-temperature start-up wear, but also greatly improves the environmental adaptability and operational efficiency of the entire oil station system.

[0057] Simultaneously, when the temperature detection unit 11 detects an abnormal rise in oil temperature exceeding the safety threshold, the control unit 6 will immediately trigger an advanced alarm. In necessary emergency situations, it can execute a safety interlock, stop the operation of the oil pump 7, and send a signal to the management system, thereby preventing the failure of the entire lubrication system and major damage to the oil-using equipment caused by high-temperature deterioration of the lubricating oil.

[0058] By introducing closed-loop temperature control, the system has achieved a leap from simple "pressure stability" to "precise dual control of pressure and temperature." This not only further enhances the system's adaptability and reliability under complex operating conditions such as "power fluctuations," but also enables intelligent management of on-demand oil supply and energy saving, forming a more complete and efficient lubrication guarantee system.

[0059] In addition, a thermal resistor Rt2 is provided downstream of the temperature detection unit 11 for transmitting temperature signals remotely to achieve precise temperature control.

[0060] Example 3 See Figure 2 In this embodiment, the oil station system disclosed herein includes an oil tank 1, an oil outlet 2, a regulating valve 3, an accumulator 4, a detection unit 5, a control unit 6 (not shown in the figure), an oil pump 7, a filter 8, a cooler 9, and an oil return port 10. The oil pump 7 includes a main oil pump 71 and a standby oil pump 72.

[0061] The motors of the main oil pump 71 and the standby oil pump 72 are each controlled by an independent contactor, which is electrically connected to the control unit 6. The control unit 6 is configured to control the start, stop and switch of the oil pump 7 based on the pressure signal and the liquid level of the oil tank 1.

[0062] The working process of the above gas station system is as follows: When the system starts, the control unit 6 starts the main oil pump 71 by default to establish the system's basic oil pressure. The lubricating oil flows sequentially through the filter 8 and the cooler 9, and the pressure is maintained stably at the oil outlet 2 by the regulating valve 3 and the accumulator 4. The specific working process is not described in detail here, please refer to the above embodiment 2.

[0063] The core dual-pump control and switching process is as follows: When the system is running stably, the main oil pump 71 is in continuous operation. The control unit 6 continuously monitors the pressure signal from the oil outlet 2. If a slight pressure fluctuation occurs, the control unit 6 will first stabilize the pressure by dynamically adjusting the opening of the regulating valve 3 and use the accumulator 4 for instantaneous compensation. At this time, the standby oil pump 72 remains in standby mode.

[0064] When the control unit 6 detects a continuous drop in oil pressure that reaches a first preset threshold (e.g., below the normal operating pressure of 0.15 MPa), it immediately determines that the main oil pump 71 may have failed due to electrical fluctuations, overload, or mechanical failure. The control unit 6 sends a disconnect command to the contactor controlling the motor of the main oil pump 71, and simultaneously sends an engagement command to the independent contactor controlling the motor of the standby oil pump 72. The standby oil pump 72 automatically starts and begins operation within a very short time (e.g., ≤1.5s), taking over the oil supply task, thereby preventing the oil pressure from dropping further to a dangerous level.

[0065] Throughout the process, the system also includes oil tank 1 level detection units SL1~2, ​​which are installed in oil tank 1. The control unit 6 monitors the oil level in oil tank 1 based on the oil tank 1 level detection units, and is electrically connected to the control unit. The control unit transmits the oil tank level signal to the control unit, enabling the control unit to start and stop the oil pumps based on the oil tank level. This allows for alarm or interlock control when the oil level is abnormal, i.e., too high or too low. If the oil level is too low, regardless of the status of the main oil pump 71 and the standby oil pump 72, the control unit 6 will prohibit the oil pump 7 from starting or immediately stop all oil pumps 7 to prevent the pump body from running dry and being damaged, and trigger an advanced alarm.

[0066] After the main oil pump 71 is repaired, maintenance personnel need to manually confirm and reset it on the control unit 6 before the system can be restored to the normal mode of "main oil pump 71 running and standby oil pump 72 on standby".

[0067] Through this workflow, the system constructs a dual-pump intelligent switching system with pressure as the judgment criterion, control unit 6 as the decision-making core, and independent contactors as the execution terminals. It ensures that when the main power source (main oil pump 71) fails due to sudden conditions such as power fluctuations, the backup power source (backup oil pump 72) can seamlessly take over, working in conjunction with the pressure stabilization system to jointly build a solid defense line, ultimately achieving uninterrupted operation of the oil supply system.

[0068] Furthermore, in this embodiment, the oil tank also includes a drain port for replacing or draining old oil. A safety valve PSV1 is also installed in the oil tank for overpressure protection. When the pressure exceeds the target pressure range, the safety valve will automatically open to release pressure, preventing damage to pipelines, oil pumps, and other components due to overpressure. In practical applications, the safety valve can be electrically connected to the control unit and open / close based on commands from the control unit.

[0069] In this embodiment of the disclosure, the oil tank is further equipped with a temperature detection unit T and a thermal resistor Rt1, which are used to detect the oil temperature in the oil tank and transmit the oil temperature signal of the oil tank to the control unit through the thermal resistor, so as to realize the monitoring and regulation of the oil temperature.

[0070] The oil pump can also be a gear pump or a plunger pump, which can pump oil in addition to extracting lubricating oil; The main oil pump and the standby oil pump are respectively equipped with motors M1 and M2 to drive the oil pump operation and ensure the reliability of the oil station system.

[0071] Of course, Embodiment 3 has all the technical effects of Embodiments 1 and 2, and those skilled in the art can fully implement and connect it based on the description of Embodiments 1 and 2, which will not be repeated here.

[0072] Example 4 See Figure 3 , Figure 4 In this embodiment, the gas station system of this disclosure employs a control circuit that is completely physically isolated from the main circuit, further improving the anti-power fluctuation performance of the gas station system. Based on the above embodiment, the system specifically also includes: The main oil pump 71 and the standby oil pump 72 are each equipped with a switch. The switch is configured to switch the control mode of the main oil pump 71 and the standby oil pump 72 in response to a signal from the control unit 6. The control mode includes an active control mode, a manual control mode, and an auxiliary control mode.

[0073] The main oil pump 71 and the standby oil pump 72 are each equipped with an intermediate relay, which is configured to control the start and stop of the main oil pump 71 and the standby oil pump 72 respectively in response to the signal of the control unit 6.

[0074] The working process of the above gas station system is as follows: In addition to possessing all the aforementioned pressure, temperature regulation, and dual-pump linkage functions, the operation of the system's core control logic relies on a control loop that is completely physically isolated from the main loop.

[0075] Furthermore, the main oil pump 71 and the standby oil pump 72 are controlled by independent transfer switches, allowing their operation to be independent.

[0076] In active control mode, control unit 6 acts as the sole decision-making core, continuously analyzing the pressure signal from oil outlet 2. When it determines that switching oil pump 7 is necessary, it immediately sends a low-power, high-reliability electrical signal to the corresponding intermediate relay. This intermediate relay then activates, driving its corresponding, higher-power main circuit contactor to analyze or engage. This "small current controlling large current" architecture is not only safe and reliable but also crucial for achieving physical isolation between the control circuit and the main power circuit, effectively preventing voltage fluctuations, surge currents, and other interference from the main circuit from entering the precision core control system.

[0077] The auxiliary control mode serves as a backup for the core automation functions. If the control unit 6 itself malfunctions or its signal becomes abnormal, the system can automatically, or the operator can switch control of the pump unit to this mode via a selector switch. In this mode, an independent pressure switch can directly drive the intermediate relay to control the start and stop of the pump unit, ensuring that the oil pump 7 continues to operate normally even after the control unit 6 fails.

[0078] The manual control mode provides ultimate protection. Operators can directly switch to manual mode via a selector switch and bypass all automatic control mechanisms by using on-site buttons to directly start or stop any oil pump 7. This provides the highest level of control and safety for equipment commissioning, emergency operations, or comprehensive overhauls in extreme situations.

[0079] The gas station system also includes a power module, which is powered by an uninterruptible power supply.

[0080] The control circuit is independently powered by an uninterruptible power supply (UPS) to ensure that the control unit 6, detection unit 5, intermediate relays and signal transmission are not affected and continue to work stably when the main circuit voltage drops due to a power grid "scan".

[0081] In summary, the UPS provides uninterrupted power to the control loop. Control unit 6, through an intermediate relay, controls the loop switching, forming an electrical isolation barrier. The "active -> auxiliary -> manual" three-mode design ensures a smooth and seamless transfer of control in the event of partial or complete failure of the automation system. This achieves an extremely high-reliability system where "the core system remains operational, commands are not lost, and operations are uninterrupted," enabling the gas station system to maintain continuous and stable operation even in the face of complex power grid disturbances and internal single-point failures, fundamentally solving the interlocking shutdown problem caused by power fluctuations.

[0082] In addition, in this embodiment, the changeover switch can be an LW8-10D424 / 4 type universal changeover switch. Figure 5 This is a contact open / close table for the main oil pump 71 and the standby oil pump 72, used to display the on / off state of each pair of contacts under different operating angles (60°, 0°, etc.). Below, "#1 Oil Pump" represents the on / off state of each pair of contacts of the main oil pump 71, and "#2 Oil Pump" represents the standby oil pump 72, indicating the on / off state of each pair of contacts when switching the control modes of the main oil pump 71 and the standby oil pump 72. Cells marked with "×" indicate the "contact position" of that row when the switch is turned to the corresponding angle (60°, 0°, etc. in the column header).

[0083] Figure 4 This is a status monitoring and fault control loop diagram for a gas station system. It is used to monitor the oil pressure, oil level, and oil temperature in real time, and to implement functions such as fault-level alarms and DCS remote control backup. The following sections explain each module in detail: I. Hydraulic Pressure Detection and Control Module Components: Pressure switches (SP1, SP2, ΔSP), relays (KA8, KA9, KA10).

[0084] SP1: Controls the "start / stop standby oil pump" logic. When the main oil pump supply is insufficient, it triggers the standby oil pump to start.

[0085] SP2: Detects "low oil outlet pressure". When the pressure is too low, SP2 will activate, relay KA9 will be energized, triggering the backup oil pump to start or the low pressure alarm to be triggered.

[0086] ΔSP: Detects "high filter differential pressure" (filter element blockage). When the differential pressure is too high, ΔSP activates, relay KA10 is energized, and a warning signal for filter blockage is issued.

[0087] II. Oil Level Control Module Components: oil level switches (SL1, SL2), relays (KA11, KA12).

[0088] SL1: Detects "low oil level". When the oil level is too low, SL1 is activated, relay KA11 is energized, triggering the low oil level alarm or oil replenishment logic.

[0089] SL2: Detects "high oil level". When the oil level is too high, SL2 will activate, relay KA12 will be energized, triggering the high oil level alarm or oil drain logic.

[0090] III. Oil Supply Temperature and DCS Control Module High oil supply temperature: The temperature detection element (TIA2) detects the oil supply temperature. When the temperature is too high, the relay KA13 is energized, triggering an alarm for high oil temperature or a forced start logic for the cooler.

[0091] DCS control ready: The changeover switches (SA1, SA2, SA4) work in conjunction with the relay KA14 to achieve the "DCS remote control ready" status - that is, the thin oil station is allowed to receive remote control commands from the central control room.

[0092] IV. Fault Classification Alarm Module Minor faults (early warnings): These include "high oil level", "high filter differential pressure", and "excessively high oil temperature", which are triggered by relays such as KA15. These are faults that can be warned but do not force a shutdown.

[0093] Major faults (interlocks): These include "low oil outlet pressure" and "low oil level," triggered by relays such as KA16. These faults directly affect equipment safety and require forced shutdown or interlocking action.

[0094] V. Traffic Light Indicator Module Components: Indicator lights (HL5~HL13).

[0095] Function: Intuitively displays system status, such as "high oil level", "high oil temperature", "low pressure", "normal gas station system", etc., which makes it easy for on-site personnel to quickly judge the operating conditions.

[0096] VI. Changeover Switches (SA2-SA4 Series) Used for switching control modes, it works with relay logic to switch between different control methods and is the core of the switch between "local operation" and "remote control from the central control room" in the thin oil station.

[0097] This circuit combines sensors / switches for "pressure, oil level, and temperature" with relay logic to achieve real-time status monitoring of the thin oil station, graded fault alarms, and remote control coordination. It ensures the stable operation of the lubrication system of the induced draft fan bearing, while promptly identifying and handling abnormalities to prevent equipment damage due to poor lubrication.

[0098] Figure 6This is the signal and alarm control loop diagram for the gas station system corresponding to Example 4. It is used to implement fault alarms, remote signal transmission, and equipment interlocking control, serving as a signal bridge between the gas station system and the central control room and main unit. The following is a breakdown by module: I. Audible Alarm Module: Enables audible and visual alarms and silencing control for on-site faults. The test button SD7 is used to test whether the alarm device is functioning correctly. The silencing button SB3, when pressed during a fault alarm, will silence the sound.

[0099] The intermediate relay contacts (KAM5, KAM6, KAM8) trigger the audible and visual alarm (HN) when the system malfunctions (such as low oil pressure or abnormal oil temperature), emitting an audible and visual warning.

[0100] Second, the signal module in the central control room transmits the operating status and fault information of the gas station system to the central control room, allowing the central control personnel to remotely monitor the system status.

[0101] The signal types (corresponding contacts and numbers) are as follows: 701-702 (KA14): DCS gas station system control ready signal → Informs the central control room that the gas station system can be remotely controlled.

[0102] 703A-704A (KA17): Prerequisites for normal operation of the gas station system (starting the main unit) → start-up of the main unit (oil-consuming equipment), where the main unit is the oil-consuming equipment.

[0103] 705-706 (KA15): Minor fault in gas station system → Gas station system control room receives minor fault warning.

[0104] 707A-703A (KA16): Interlock signal for forced shutdown of main unit due to major fault in gas station system (shutdown of main unit).

[0105] 713-714 (KA3): Main oil pump operation → Feedback on main oil pump operating status.

[0106] 715-716 (KA4): Standby oil pump operation → Feedback on standby oil pump operating status.

[0107] 775-776 (KA19): Remote control mode → Feedback on the status of the gas station system in "remote control" mode.

[0108] 777-778 (KA20): Local control mode → Feedback on the status of the gas station system in "local control" mode, where local control is manual control mode.

[0109] Third, remove the main unit's hard interlock module to achieve interlock control between the main unit and the gas station system.

[0110] 703B-704B (KA17): Gas station system normal (main unit powered on) → Repeated interlock signal to ensure main unit startup logic.

[0111] 707B-708B (KA16): Gas station system major fault (main unit shutdown) → Gas station system repeats interlock signal to ensure main unit shutdown logic.

[0112] Fourth, the signal module from the central control room enables remote operation of the gas station system by the central control room.

[0113] Main unit operation (101-102): Feedback on the operating status of the main unit, allowing the gas station system to perceive the operating condition of the main unit.

[0114] Remote start and stop of main oil pump (106-107, 106-105): The main oil pump can be started and stopped remotely from the central control room.

[0115] Remote start and stop of standby oil pump (70-0 to 71-0, 70-69) → Remote control of standby oil pump start and stop from the central control room.

[0116] By using the logic of "on-site alarm gas station system + gas station system remote signal gas station system + gas station system interlocking control", the gas station system can achieve fault visualization, status transmission, and equipment remote control. This ensures that on-site personnel can handle faults in a timely manner, and allows the central control room to have overall control of the system. At the same time, the interlocking logic prevents the main unit from being damaged due to gas station system faults, which is an important electrical guarantee for the safe and stable operation of oil-using equipment.

[0117] Of course, Embodiment 4 has all the technical effects of all the above embodiments, and those skilled in the art can fully implement and connect it based on the description of Embodiments 1, 2 and 3, which will not be repeated here.

[0118] Example 5 In this embodiment, the lubrication system of this disclosure includes an oil-using device (not shown in the figure) and an oil station system as described in any one of embodiments one to four, wherein the oil-using device is connected to the oil outlet and the oil return port of the oil station system.

[0119] In detail, in this embodiment, the oil-using equipment can be an induced draft fan.

[0120] In this embodiment, the above-mentioned oil station system is used to lubricate the oil-using equipment. The oil station system transports lubricating oil to the oil-using equipment through the oil outlet, enters the various components of the oil-using equipment, and lubricates them. Then, the lubricating oil flows back from the oil return port to the oil tank in the oil station system and is used to continue to lubricate the oil-using equipment, thereby achieving environmentally friendly reuse.

[0121] Of course, Embodiment 5 has all the technical effects of all the above embodiments, and those skilled in the art can fully implement and connect it based on the description of Embodiments 1, 2 and 3, which will not be repeated here.

[0122] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A gas station system, characterized in that, include; An oil tank and an oil outlet, wherein the lubricating oil in the oil tank is transferred to the oil outlet through an oil pipeline; A regulating valve is installed on the oil pipeline; An accumulator, located on the oil pipeline near the oil outlet, is configured to store a remaining amount of lubricating oil. The detection unit is installed on the oil pipeline near the oil outlet and is electrically connected to the control unit. It is used to detect the pressure in the oil pipeline and transmit the detected pressure signal to the control unit. The control unit is electrically connected to the regulating valve and is configured to control the opening degree of the regulating valve based on the pressure signal.

2. The gas station system according to claim 1, characterized in that, The detection unit includes at least two pressure transmitters.

3. The gas station system according to claim 1, characterized in that, The regulating valve is a self-operated regulating valve.

4. The gas station system according to any one of claims 1 to 3, characterized in that, The system also includes an oil pump located on the oil pipeline, the oil pump being located between the oil tank and the regulating valve and near one end of the oil tank.

5. The gas station system according to claim 4, characterized in that, The system also includes a temperature detection unit electrically connected to the control unit; the control unit is further configured to control the start / stop or operating frequency of the oil pump based on the temperature signal from the temperature detection unit.

6. The gas station system according to any one of claims 1 to 3, characterized in that, The system also includes a filter located on the oil pipeline, the filter being configured to filter the lubricating oil flowing toward the oil outlet.

7. The gas station system according to any one of claims 1 to 3, characterized in that, The system also includes a cooler disposed on the oil pipeline and having a cooling water inlet and a cooling water outlet, wherein the cooling water in the cooler is configured to cool the lubricating oil flowing toward the oil outlet.

8. The gas station system according to any one of claims 1 to 3, characterized in that, The system also includes an oil return port. One end of the oil-using device is connected to the oil outlet and the other end is connected to the oil return port. The lubricating oil enters the oil-using device through the oil outlet to lubricate the various components of the oil-using device, and flows back to the oil tank from the oil-using device through the oil return port.

9. The gas station system according to claim 4, characterized in that, The oil pump includes a main oil pump and a standby oil pump. The motors of the main oil pump and the standby oil pump are each controlled by an independent contactor, which is electrically connected to the control unit. The control unit is configured to control the start, stop and switch of the oil pump based on the pressure signal and the liquid level in the oil tank.

10. The gas station system according to claim 9, characterized in that, The main oil pump and the standby oil pump are each equipped with a switch. The switch is configured to switch the control mode of the main oil pump and the standby oil pump in response to a signal from the control unit. The control mode includes an active control mode, a manual control mode, and an auxiliary control mode.

11. The gas station system according to claim 10, characterized in that, The main oil pump and the standby oil pump are each equipped with an intermediate relay, which is configured to control the start and stop of the main oil pump and the standby oil pump respectively in response to a signal from the control unit.

12. The gas station system according to any one of claims 1-3, characterized in that, The gas station system also includes a power module, which is powered by an uninterruptible power supply.

13. A lubrication system, characterized in that, It includes oil-using equipment and a gas station system as described in any one of claims 1-12, wherein the oil-using equipment is connected to the oil outlet and oil return port of the gas station system.

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