Emergency fire-resistant oil supplementing device for steam turbine

Abstract

The utility model relates to the technical field of steam turbine regulation and control, and discloses a steam turbine fire-resistant oil emergency oil supplementing device which comprises a fire-resistant oil regeneration assembly and an emergency oil supplementing assembly, the fire-resistant oil regeneration assembly comprises a fire-resistant oil tank, a circulating pump and a regeneration device which are communicated in sequence, and the regeneration device is communicated with the fire-resistant oil tank; the emergency oil supplementing assembly comprises an oil supplementing tank storing standby fire-resistant oil, the oil supplementing tank is communicated with the circulating pump, an emptying pipe and an oil supplementing pipe are fixedly arranged on the oil supplementing tank, an emptying valve is fixed to the emptying pipe, the oil supplementing pipe is communicated with the circulating pump, and a check valve is arranged on the oil supplementing pipe. Standby fire-resistant oil is arranged in the oil supplementing tank, the oil supplementing tank is in butt joint with the system through an emptying pipe and an oil supplementing pipe provided with a check valve, it is ensured that the fire-resistant oil flows in one direction, and oil can be rapidly supplemented without interrupting existing circulation. Meanwhile, the emergency oil supplementing assembly is arranged close to a production site, an oil leakage event can be responded in the first time, the oil level can be supplemented in time, and oil pressure drop is prevented from triggering protection shutdown; in addition, spare oil is supplemented after being treated by a regeneration device, so that the oil quality is effectively guaranteed, the service life of fire-resistant oil is prolonged, and the economical efficiency and the environmental protection property of the system are integrally improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine regulation and control, in particular to an emergency oil replenishing device for steam turbine fire-resistant oil. Background Technique

[0002] In the operation system of a thermal power plant, as the core power conversion device, the stable operation of the steam turbine regulation and control system is directly related to the safety and efficiency of power supply. Among them, the fire-resistant oil hydraulic system plays a crucial role. It not only undertakes the important task of precisely controlling the speed and load of the steam turbine, but also ensures the response speed and dynamic stability of the system. However, the frequent occurrence of oil leakage incidents in the fire-resistant oil system has become a major hidden danger affecting the safe and stable operation of the unit. These problems usually stem from the aging and damage of pipeline interfaces and seals, as well as the unfavorable on-site environmental conditions, such as high temperature and high humidity. These factors act together, accelerating the oil leakage risk and reducing the reliability and stability of the system. Traditional strategies for dealing with oil leakage, such as on-site emergency remedies and post-event repairs, often cannot quickly and effectively contain the oil level drop. Especially in the case of high oil pressure and a limited volume of the fire-resistant oil tank, once a leak occurs, the sudden drop in the oil level within a short time may cause the unit to trip protectively, not only affecting the continuity of power supply but also causing huge economic losses. In addition, the storage and rapid replenishment of standby fire-resistant oil are also a major challenge currently. Due to the limitations of the production site environment, the standby oil cannot be stored near the production site, resulting in a certain distance between the standby oil storage location and the production site. And the cumbersome process of handling and refueling prolongs the emergency response time, making it difficult to quickly replenish the lost fire-resistant oil at a critical moment and ensure the stability of the oil pressure. Content of the Utility Model

[0003] The purpose of the utility model is to provide an emergency oil replenishing device for steam turbine fire-resistant oil to quickly replenish the oil level in the fire-resistant oil tank, thereby quickly and effectively containing the oil level drop and avoiding the protective tripping of the unit caused by the sudden drop in the oil level within a short time.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: An emergency oil replenishing device for steam turbine fire-resistant oil includes a fire-resistant oil regeneration component and an emergency oil replenishing component. The fire-resistant oil regeneration component includes a fire-resistant oil tank, a circulation pump, and a regeneration device that are connected in sequence. The regeneration device is connected to the fire-resistant oil tank; the emergency oil replenishing component includes a replenishing oil tank storing standby fire-resistant oil. The replenishing oil tank is connected to the circulation pump. An emptying pipe and a replenishing oil pipe are fixedly arranged on the replenishing oil tank. An emptying valve is fixed on the emptying pipe. The replenishing oil pipe is connected to the circulation pump, and a check valve is arranged on the replenishing oil pipe.

[0005] The beneficial effects of this solution are as follows: 1. Connect the makeup oil tank with the circulating pump of the anti - fuel oil regeneration component. When refueling, the standby anti - fuel oil can borrow the original regeneration circulation pipeline of the steam turbine unit to enter the anti - fuel oil tank, reducing the modification of the steam turbine unit's pipeline and the modification cost. At the same time, the standby anti - fuel oil enters the anti - fuel oil tank after being treated by the regeneration device, which can ensure the quality of the anti - fuel oil entering the anti - fuel oil tank, avoid the deterioration of the anti - fuel oil due to long - term storage in an unsuitable environment, and affect the quality of the anti - fuel oil; 2. Install a check valve on the makeup oil pipe, so that the anti - fuel oil can only enter the circulating pump from the makeup oil tank. When refueling, the operator does not need to cut off the connection pipeline between the anti - fuel oil tank and the circulating pump first, but directly opens the drain valve and connects the makeup oil pipe with the circulating pump, thereby borrowing the anti - fuel oil flowing between the anti - fuel oil tank and the circulating pump to transfer the anti - fuel oil in the makeup oil tank into the circulating pump; 3. Store the standby anti - fuel oil directly at the production site. When a leakage accident occurs, the anti - fuel oil in the anti - fuel oil tank can be replenished in time, improving the efficiency of emergency response, quickly replenishing the oil level in the anti - fuel oil tank, thus quickly and effectively curbing the decline of the oil level and avoiding the unit protection trip of the steam turbine caused by the sudden drop of the oil level within a short time.

[0006] Furthermore, the volume of the anti - fuel oil in the makeup oil tank is not less than 1 / 2 of the volume of the makeup oil tank.

[0007] Beneficial effect: When overhauling a leakage accident, the leakage degree of the anti - fuel oil may be expanded due to operation errors. Maintaining the anti - fuel oil in the makeup oil tank above 1 / 2 of the volume of the makeup oil tank enables the anti - fuel oil in the makeup oil tank to meet at least the refueling requirements for two to three leakage accidents, avoiding the situation where the standby oil cannot meet the refueling requirements due to maintenance accidents and further expanding the losses.

[0008] Furthermore, a liquid level gauge is installed on the makeup oil tank.

[0009] Beneficial effect: Through the liquid level gauge, both the operator and the patrol personnel can directly observe the liquid level of the anti - fuel oil in the makeup oil tank, avoiding the situation where the anti - fuel oil in the makeup oil tank cannot be replenished in time after use due to the operator's mistakes, affecting the reuse of the makeup oil tank.

[0010] Furthermore, the material of the makeup oil tank can be an anti - fuel oil barrel. The anti - fuel oil barrel includes an oil barrel cover. An exhaust door is installed by opening a hole at the top of the oil barrel. The exhaust door is connected to an exhaust pipe. A stainless steel pipe is welded after opening a hole in the oil barrel cover, and the stainless steel pipe is connected to the makeup oil pipe.

[0011] Beneficial effect: Converting the anti - fuel oil barrel into a makeup oil tank, first, the material meets the storage requirements of the anti - fuel oil. Second, the structure is simple. Only a tee needs to be added to the original regeneration pipeline, and the stainless steel pipe is connected to the tee through a steel wire hose, with less change to the original pipeline structure and low modification cost.

[0012] Further, it also includes a control unit, which includes a controller and a make-up oil valve. A liquid level sensor is built in the fire-resistant oil tank. Both the drain valve and the make-up oil valve are solenoid valves. The liquid level sensor, the drain valve and the make-up oil valve are all electrically connected to the controller.

[0013] Beneficial effects: Through the settings of the liquid level sensor and the controller, the liquid replenishment work of the make-up oil tank is connected to the liquid level sensor. When the liquid level in the fire-resistant oil tank drops rapidly, the controller automatically controls the opening of the drain valve and the make-up oil valve of the make-up oil tank, so that the standby fire-resistant oil in the make-up oil tank enters the fire-resistant oil tank through the circulation pump, extending the accident handling time of the operator.

[0014] Further, it also includes an alarm, and the alarm is electrically connected to the controller.

[0015] Beneficial effects: When the controller controls the opening of the drain valve and the make-up oil valve, an alarm is issued through the alarm, enabling the operator to know that a leakage accident has occurred and allowing the operator to make timely handling. Description of the Drawings

[0016] Figure 1 Schematic diagram of Embodiment 1 of the present utility model;

[0017] Figure 2 Schematic diagram of Embodiment 2 of the present utility model;

[0018] Figure 3 Schematic diagram of the connection of the control unit in Embodiment 3 of the present utility model. Detailed Embodiments

[0019] The following is a further detailed description through specific embodiments:

[0020] The reference numerals in the accompanying drawings of the specification include: make-up oil tank 1, drain pipe 11, make-up oil pipe 12, make-up oil valve 121, check valve 13, fire-resistant oil tank 21, circulation pump 23, first circulation pipeline 241, second circulation pipeline 242, third circulation pipeline 243, regeneration device 22.

[0021] Embodiment 1

[0022] Embodiment 1 is basically as shown in the attached Figure 1 shown, as Figure 1A steam turbine fire-resistant oil emergency oil replenishment device shown in the figure includes an emergency oil replenishment component and a fire-resistant oil regeneration component. The emergency oil replenishment component includes an oil replenishment tank 1, an evacuation pipe 11, and an oil replenishment pipe 12. The oil replenishment tank 1 stores spare fire-resistant oil. The material of the oil replenishment tank 1 can be a fire-resistant oil barrel, and the fire-resistant oil barrel includes an oil barrel cover. During production, a hole is opened at the top of the fire-resistant oil barrel and an evacuation door is welded. A stainless steel pipe is welded after opening a hole in the oil barrel cover. When the oil barrel cover is closed on the fire-resistant oil barrel, the bottom end of the stainless steel pipe extends into the fire-resistant oil barrel and is 1 - 10 mm away from the bottom wall of the fire-resistant oil barrel, so as to transport the fire-resistant oil stored in the oil replenishment tank 1 through the stainless steel pipe.

[0023] The evacuation door is connected to the evacuation pipe 11, and the oil replenishment pipe 12 and the stainless steel pipe are both connected by clamps, which facilitates the disassembly, cleaning, replacement, etc. of the oil replenishment tank 1. The oil replenishment pipe 12 is connected to the circulation pump 23. The evacuation pipe 11 and the oil replenishment pipe 12 are fixedly arranged on the oil replenishment tank 1. An evacuation valve is fixed on the evacuation pipe 11. The oil replenishment pipe 12 is connected to the circulation pump 23, and a check valve 13 and an oil replenishment valve 121 are arranged on the oil replenishment pipe 12. Under normal conditions, both the evacuation valve and the oil replenishment valve 121 are in the closed state, making the inside of the oil replenishment tank 1 in a sealed environment and extending the storage time of the spare fire-resistant oil.

[0024] The fire-resistant oil regeneration component includes a fire-resistant oil tank 21, a circulation pump 23, a regeneration device 22, and a connection unit. The connection unit includes a first circulation pipeline 241, a second circulation pipeline 242, and a third circulation pipeline 243 as shown in Figure 1 the figure. The first circulation pipeline 241 connects the fire-resistant oil tank 21 and the circulation pump 23. The second circulation pipeline 242 connects the circulation pump 23 and the regeneration equipment. The third circulation pipeline 243 connects the regeneration equipment and the fire-resistant oil tank 21. Thus, with the circulation pump 23 as the power source, the fire-resistant oil in the fire-resistant oil tank 21 is continuously circulated in the regeneration equipment to regenerate the deteriorated oil through the regeneration device 22 and maintain the quality of the fire-resistant oil in the fire-resistant oil tank 21. The treatment method of the regeneration device 22 for regenerating the deteriorated oil in this solution is the same as that of the regeneration device 22 disclosed in the Chinese patent with the publication number CN102796607B, which will not be elaborated here. A tee is arranged on the first circulation pipeline 241, and the tee is connected to the oil replenishment pipe 12. When a leakage accident occurs, the evacuation valve and the oil replenishment valve 121 are opened, so that the oil replenishment tank 1 is connected to the first circulation pipeline 241, and thus the power of the circulation pump 23 is used to transport the spare fire-resistant oil in the oil replenishment tank 1 to the regeneration equipment and then to the fire-resistant oil tank 21, so as to maintain the liquid level of the fire-resistant oil tank 21, quickly and effectively contain the decline of the oil level, avoid the protective tripping of the unit due to the sudden drop of the oil level in a short time, and thus reduce economic losses.

[0025] Embodiment 2

[0026] Example 2 is basically the same as Example 1, except that a liquid level gauge is provided on the make-up oil tank 1 to facilitate the operator to directly observe the volume of the standby fire-resistant oil stored in the make-up oil tank 1, and ensure that the volume of the standby fire-resistant oil stored in the make-up oil tank 1 is maintained above 1 / 2 of the volume of the make-up oil tank 1, so as to avoid the situation that when a leakage accident occurs again, the standby fire-resistant oil stored in the make-up oil tank 1 cannot maintain the liquid level of the fire-resistant oil tank 21, as Figure 2 shown, there are two sets of circulating pumps 23, and the two sets of circulating pumps 23 are arranged in parallel and can be used as spares for each other. On the one hand, the two sets of circulating pumps 23 can be used alternately, reducing the continuous working time of a single set of circulating pumps 23 and extending the service life of the circulating pumps 23. On the other hand, when a set of circulating pumps 23 fails, the other set of circulating pumps 23 can be immediately started, and the faulty set of circulating pumps 23 can be repaired to avoid affecting the normal operation of the fire-resistant oil regeneration component.

[0027] Example 3

[0028] On the basis of Example 1, both the drain valve and the make-up oil valve 121 are solenoid valves. Example 3 further includes a control unit, and the control unit includes a controller, a liquid level sensor and an alarm. The controller is a programmable logic controller (PLC), and the controller is built-in with a warning liquid level of the fire-resistant oil tank 21. The connection modes of the drain valve, the make-up oil valve 121, the liquid level sensor, the alarm and the controller are as Figure 3 shown. Among them, the liquid level sensor is a capacitive liquid level sensor, and the liquid level sensor is fixedly arranged on the upper top surface of the inner wall of the fire-resistant oil tank 21 to real-time monitor the liquid level of the fire-resistant oil in the fire-resistant oil tank 21 and transmit the monitored liquid level to the controller. When the monitored liquid level is lower than the warning liquid level, the controller controls the drain valve and the make-up oil valve 121 to open, and uses the standby fire-resistant oil in the make-up oil tank 1 to maintain the liquid level of the fire-resistant oil tank 21. At the same time, the controller transmits a signal to the alarm, so that the alarm gives an alarm.

[0029] The above are only the embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail here. It should be noted that the technical means for solving problems in the above embodiments of the present invention can be combined to solve multiple technical problems at the same time. For those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. An emergency oil replenishing device for fire-resistant oil of a steam turbine, characterized in that: It includes a fire-fighting oil regeneration component and an emergency oil replenishing component. The fire-fighting oil regeneration component includes a fire-fighting oil tank, a circulation pump and a regeneration device which are connected in sequence, and the regeneration device is connected to the fire-fighting oil tank; the emergency oil replenishing component includes an oil replenishing tank storing spare fire-fighting oil, the oil replenishing tank is connected to the circulation pump, a drain pipe and an oil replenishing pipe are fixedly arranged on the oil replenishing tank, a drain valve is fixed on the drain pipe, the oil replenishing pipe is connected to the circulation pump, and a check valve is arranged on the oil replenishing pipe.

2. The device for emergency oil replenishment of fire-resistant oil for steam turbine according to claim 1, characterized in that: The volume of the fire-resistant oil in the replenishing tank shall not be less than 1 / 2 of the capacity of the replenishing tank.

3. The device for emergency oil replenishment of fire-resistant oil for steam turbine according to claim 2, characterized in that: A liquid level gauge is provided on the oil filling tank.

4. The emergency oil replenishing device for fire-resistant oil of a steam turbine according to claim 3 is characterized in that: The material of the oil filling tank can be a fire-resistant oil barrel, which includes an oil barrel cover. A drain door is installed at the top of the oil barrel, and the drain door is connected to the drain pipe. A hole is opened on the oil barrel cover and a stainless steel pipe is welded thereon, and the stainless steel pipe is connected to the oil filling pipe.

5. The emergency oil replenishing device for fire-resistant oil of a steam turbine according to claim 1, characterized in that: It also includes a control unit, which includes a controller and an oil replenishing valve. The fire-resistant oil tank is equipped with a liquid level sensor. The drain valve and the oil replenishing valve are both solenoid valves. The liquid level sensor, the drain valve and the oil replenishing valve are all electrically connected to the controller.

6. The device for emergency oil replenishment of fire-resistant oil for steam turbine according to claim 5, characterized in that: The utility model also comprises an alarm, and the alarm is electrically connected with the controller.

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