A lubricating oil filling tool for electric actuators in nuclear power plants

Abstract

The present invention belongs to the technical field of maintenance of electric actuators in nuclear power plants, and specifically relates to a lubricating oil filling tool for electric actuators in nuclear power plants. The quantitative component can quantitatively control the filling amount of the actuator lubricating oil, so that the maintenance quality is more precise and controllable, freeing up manpower and being more convenient and quick, reducing the exposure time of the inside of the equipment during maintenance, and reducing the possibility of foreign matter entering the inside of the equipment.

Description

Technical Field

[0001] The present application belongs to the technical field of maintenance of electric actuators in nuclear power plants, and specifically relates to a lubricating oil filling tool for electric actuators in nuclear power plants. Background Art

[0002] According to the requirements of the nuclear power plant maintenance program, electric actuators should be dismantled and overhauled periodically. During the dismantling and overhaul of electric actuators, if the lubricating oil is found to be in a bad state, the lubricating oil must be replaced to avoid affecting the reliable operation of the equipment.

[0003] The current method of replacing the lubricating oil of electric actuators is to manually add new lubricating oil after cleaning the old lubricating oil. This method is inefficient, time-consuming and prone to lubricating oil leakage, causing site pollution. Subsequent tool cleaning is also complicated, time-consuming and difficult to carry out. Summary of the invention

[0004] The purpose of this application is to provide a lubricating oil filling tool for electric actuators in nuclear power plants, so as to solve the problem that the lubricating oil replacement of electric actuators is inefficient, time-consuming and prone to lubricating oil leakage, causing site pollution.

[0005] Technical solution to achieve the purpose of this application:

[0006] The embodiment of the present application provides a lubricating oil filling tool for an electric actuator of a nuclear power plant, the lubricating oil filling tool comprising: an oil box, a filling component and a quantitative component;

[0007] The oil box is used to contain lubricating oil; an oil nozzle is provided on the oil box, and a piston plate is installed inside; the piston plate moves according to the amount of lubricating oil in the oil box;

[0008] The filling assembly is connected to the oil nozzle and is used to control the lubricating oil in the oil box to be output through the oil nozzle;

[0009] The quantitative component is used to control the action of the filling component according to the position of the piston plate and the set lubricating oil filling amount.

[0010] Optional,

[0011] The filling assembly is also used to control the lubricating oil to be sucked into the oil box from the oil nozzle.

[0012] Optionally, the filling assembly includes: a control circuit, a motor and an oil pump;

[0013] The motor is connected to the oil pump; the oil pump is connected to the oil nozzle via a hose;

[0014] The control circuit is used to control the action of the motor to drive the oil pump to rotate forward or reverse.

[0015] Optionally, the control circuit includes: a driving power supply and an oil injection control switch;

[0016] The driving power supply is connected to the motor via the oil injection control switch; the oil injection control switch includes three control positions: oil suction position, oil injection position and stop position;

[0017] When the oil filling control switch is in the oil suction position, the driving power supply controls the motor to rotate, driving the oil pump to suck the lubricating oil into the oil box; when the oil filling control switch is in the oil filling position, the driving power supply controls the motor to rotate in the opposite direction, driving the oil pump to suck the lubricating oil out of the oil box; when the oil filling control switch is in the stop position, the link between the driving power supply and the motor is cut off.

[0018] Optionally, the quantitative component includes: a magnetic switch, a metal guide rail and a capacity scale;

[0019] The metal guide rail is connected in series between the driving power source and the motor;

[0020] The magnetic switch is slidably mounted on the metal guide rail to cut off or connect the link between the driving power source and the motor;

[0021] The magnetic switch is also connected to the capacity scale, and a pointer is provided on the top of the magnetic switch for pointing to the number on the capacity scale to indicate the amount of lubricating oil in the oil box;

[0022] The piston plate is provided with a magnetic device for controlling the magnetic switch to be disconnected.

[0023] Optionally, the lubricating oil filling tool further includes: a housing;

[0024] The oil box, the filling assembly and the quantitative assembly are all installed inside the housing;

[0025] The housing is provided with a handle, and the oil filling control switch is mounted on the handle.

[0026] Optional,

[0027] The oil filling control switch is a double-pole triple-throw switch.

[0028] Optional,

[0029] The piston plate is provided with two sealing rings, which are pressed tightly between the piston plate and the inner wall of the oil box to ensure reliable sealing of the lubricating oil in the oil box.

[0030] Optional,

[0031] The piston plate is also provided with a guide strip, which is located between the two sealing rings and is used to keep the piston plate stable during movement.

[0032] Optionally, the oil nozzle comprises: an anti-leakage oil nozzle and a joint;

[0033] A slot is provided at one end of the anti-leakage nozzle, and a through hole is provided at the bottom of the slot and penetrates to the other end of the anti-leakage nozzle;

[0034] A spring and a blocking bead fixed at one end of the spring are arranged in the slot; the spring is used to press the blocking bead tightly against the through hole;

[0035] A passage is provided in the middle of the joint, which passes through one end of the joint to the other end; a small hole is provided on the side wall of one end of the joint, which passes through the passage;

[0036] One end of the connector can be inserted into the through hole and compress the spring to move the blocking bead away from the through hole.

[0037] Optional,

[0038] The other end of the connector is a quick-connect design for installing a hose.

[0039] Optional,

[0040] The oil box is provided with a driving handle connected to the piston plate, which is used to manually drive the piston plate to move so as to fill and output the lubricating oil.

[0041] The beneficial technical effects of this application are:

[0042] (1) The embodiment of the present application provides a lubricating oil filling tool for electric actuators in nuclear power plants. The quantitative component can quantitatively control the filling amount of the actuator lubricating oil, making the maintenance quality more precise and controllable, freeing up manpower and making it more convenient and quick, reducing the time when the inside of the equipment is exposed during maintenance, and reducing the possibility of foreign matter entering the inside of the equipment;

[0043] (2) The embodiment of the present application provides a lubricating oil filling tool for electric actuators in nuclear power plants, and the oil box can ensure that the lubricating oil will not leak during transportation and use;

[0044] (3) The embodiment of the present application provides a lubricating oil filling tool for electric actuators in nuclear power plants, which can reasonably select the number of oil boxes to be carried according to the actual needs of on-site use, thereby avoiding the transportation of a whole barrel of lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1A schematic structural diagram of a lubricating oil filling tool for an electric actuator in a nuclear power plant provided in an embodiment of the present application;

[0046] Figure 2 A circuit topology of a control circuit in a lubricating oil filling tool for an electric actuator in a nuclear power plant provided in an embodiment of the present application;

[0047] Figure 3 A schematic diagram of the structure of a magnetic switch in a lubricating oil filling tool for an electric actuator in a nuclear power plant provided in an embodiment of the present application;

[0048] Figure 4 A schematic diagram of the structure of an anti-leakage oil nozzle in a lubricating oil filling tool for an electric actuator in a nuclear power plant provided in an embodiment of the present application;

[0049] Figure 5 A schematic structural diagram of a joint in a lubricating oil filling tool for an electric actuator in a nuclear power plant provided in an embodiment of the present application.

[0050] In the figure:

[0051] 1-oil box; 11-oil nozzle; 12-piston plate; 13-magnetic device; 14-leak-proof oil nozzle, 141-slot, 142-through hole, 143-spring, 144-blocking bead; 15-connector, 151-channel, 152-small hole, 153-quick connection design;

[0052] 2-filling assembly; 21-control circuit; 22-motor; 23-oil pump;

[0053] 3-quantitative assembly; 31-magnetic switch; 32-capacity scale; 33-conductive plate; 34-armature;

[0054] 4- Shell. DETAILED DESCRIPTION

[0055] In order to make those skilled in the art better understand the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only a part of the embodiments of the present application, not all. Based on the embodiments recorded in the present application, all other embodiments obtained by those skilled in the art without paying creative work are within the scope of protection of the present application.

[0056] The inventors of the present application have found in their research that since there is currently no dedicated lubricant filling tool for electric actuators, there are often the following difficulties when performing the lubricant replacement step:

[0057] 1. Due to the lack of suitable lubricant oil packaging and storage tools, every time the lubricant oil needs to be replaced, a whole barrel (such as 20L) of lubricant oil needs to be transported to the site, and the remaining lubricant oil needs to be transported out after the filling is completed. However, the lubricant oil required for the replacement of electric actuators on site is often only a few liters, which results in a large waste of labor and delays a lot of working time.

[0058] 2. The current method of replacing the lubricating oil of electric actuators is to manually add new lubricating oil after cleaning the old lubricating oil. However, due to the lack of special filling tools, spoon-type containers are currently used for scooping. This method is inefficient, time-consuming and prone to lubricating oil leakage, causing site pollution. Subsequent tool cleaning is also complicated, time-consuming and difficult to carry out.

[0059] 3. Manual filling also creates a problem: the amount of lubricant cannot be determined. The viscosity of the lubricant is high, and the lubricant adheres to the inner and outer walls of the container when it is manually scooped, resulting in the inability to accurately calculate the amount of lubricant added. As a result, it is impossible to reasonably judge whether the actuator has been filled with the required lubricant. This method is highly dependent on the personal experience of the maintenance personnel and requires long-term practical operation to train.

[0060] 4. The manual lubrication method is usually performed when the hollow shaft of the electric actuator is pulled out. When the hollow shaft is reinstalled after the lubrication is added, the top of the hollow shaft will be contaminated with lubrication, and it may even enter the hollow shaft of the electric actuator. While polluting the site, if the lubrication inside the hollow shaft is not cleaned in time, it will dry up inside the hollow shaft for a long time, forming brown spots under high temperature, and even posing certain safety risks when operating in high temperature places.

[0061] 5. The current lubricating oil filling operation is in the middle and late stages of the actuator disassembly process. At this time, the actuator housing is open, and the oil barrel needs to be kept open during the lubricating oil filling process. This virtually increases the difficulty of preventing foreign matter and increases the possibility of foreign matter entering the actuator, thereby reducing the operating reliability of the equipment.

[0062] To solve the above problems, the present application provides a lubricating oil filling tool for electric actuators in nuclear power plants, which aims to reduce the labor intensity of dismantling and shorten the equipment maintenance time, improve the quality of equipment maintenance, and guide the maintenance work of electric actuators to develop in the direction of automation and precision.

[0063] Based on the above content, in order to clearly and in detail illustrate the above advantages of the present application, the specific implementation methods of the present application will be described below in conjunction with the accompanying drawings.

[0064] See also Figure 1, this figure is a structural schematic diagram of a lubricating oil filling tool for an electric actuator in a nuclear power plant provided in an embodiment of the present application.

[0065] The embodiment of the present application provides a lubricating oil filling tool for an electric actuator in a nuclear power plant, comprising: an oil box 1, a filling component 2 and a quantitative component 3;

[0066] The oil box 1 is used to contain lubricating oil; an oil nozzle 11 is provided on the oil box 1, and a piston plate 12 is installed inside; the piston plate 12 moves according to the amount of lubricating oil in the oil box 1;

[0067] The filling assembly 2 is connected to the oil nozzle 11 and is used to control the lubricating oil in the oil box 1 to be output through the oil nozzle 11;

[0068] The dosing component 3 is used to control the action of the filling component 2 according to the position of the piston plate 12 and the set lubricating oil filling amount.

[0069] It is understandable that the oil box 1 plays the role of packaging the lubricating oil. Before installation and use, the lubricating oil will be completely sealed in the oil box 1, solving the problem of packaging and transportation of the lubricating oil. The oil box 1 can be quickly replaced during use and can be reliably installed on the tool body.

[0070] In some possible implementations of the embodiments of the present application, two circles of sealing rings are provided on the piston plate 12 , and the two circles of sealing rings are pressed between the piston plate 12 and the inner wall of the oil box 1 to ensure reliable sealing of the lubricating oil in the oil box 1 .

[0071] In one example, a guide strip is further provided on the piston plate 12 . The guide strip is located between the two sealing rings and is used to keep the piston plate 12 stable during movement.

[0072] It is understandable that the sealing effect of the piston plate 12 is achieved by the two sealing rings thereon. The plane of the piston plate is kept stable during movement. The guide strip can prevent the piston plate 12 from deviating during movement, thereby causing excessive friction and jamming of the piston plate 12. In practical applications, the sealing ring and the guide are installed in the designed groove to ensure their reliable fixation, and together realize the function of pushing out and sucking in the lubricating oil, while sealing the lubricating oil inside the oil box 1.

[0073] In some possible implementations of the embodiments of the present application, the oil box 1 is provided with a driving handle connected to the piston plate 12 for manually driving the piston plate 12 to move for filling and outputting lubricating oil.

[0074] It should be noted that, when encountering special circumstances, such as when the filling assembly 2 fails, manual operation can be performed through the driving handle.

[0075] In one example, the filling assembly 2 is also used to control the lubricating oil to be sucked into the oil box 1 from the oil nozzle 11 .

[0076] In some possible implementations of the embodiments of the present application, the filling assembly 2 includes: a control circuit 21, a motor 22 and an oil pump 23;

[0077] The motor 22 is connected to the oil pump 23; the oil pump 23 is connected to the oil nozzle 11 via a hose;

[0078] The control circuit 21 is used to control the action of the motor 22 to drive the oil pump 23 to rotate forward or reverse.

[0079] In some possible implementations of the present application, such as Figure 2 As shown, the control circuit 21 includes: a driving power supply V and an oil injection control switch K1;

[0080] The driving power source V is connected to the motor 22 via the oil filling control switch K1; the oil filling control switch K1 includes three control positions: oil suction position, oil filling position and stop position;

[0081] When the oil filling control switch K1 is in the oil suction position, the driving power supply V controls the motor 22 to rotate, driving the oil pump 23 to suck the lubricating oil into the oil box 1; when the oil filling control switch K1 is in the oil filling position, the driving power supply V controls the motor 23 to rotate in the opposite direction, driving the oil pump 23 to suck the lubricating oil out of the oil box 1; when the oil filling control switch K1 is in the stop position, the link between the driving power supply V and the motor 22 is cut off.

[0082] In practical applications, the oil filling control switch K1 can be a double-pole triple-throw switch.

[0083] In an example, Figure 1 As shown, the lubricating oil filling tool also includes: a shell 4, which is convenient for carrying.

[0084] The oil box 1, the filling assembly 2 and the quantitative assembly 3 are all installed inside the housing 4;

[0085] The housing 4 is provided with a handle, and the oil filling control switch K1 is mounted on the handle.

[0086] In some possible implementations of the present application, such as Figure 1 As shown, the quantitative component 3 includes: a magnetic switch 31, a metal guide rail (not shown in the figure) and a capacity scale 32;

[0087] The metal guide rail is connected in series between the driving power source V and the motor 22;

[0088] The magnetic switch 31 is slidably mounted on the metal rail to cut off or connect the link between the driving power source V and the motor 22;

[0089] The magnetic switch 31 is also connected to the capacity scale 32. A pointer is provided on the top of the magnetic switch 31 to point to the number on the capacity scale 32 to indicate the amount of lubricating oil in the oil box 1.

[0090] A magnetic device 13 is provided on the piston plate 12 for controlling the magnetic switch 31 to be disconnected.

[0091] It is understandable that after the oil box 1 is installed, it corresponds to the capacity scale 32. The capacity scale 32 indicates the volume of the oil box 1 and fixes the magnetic switch 31 and the metal guide rail.

[0092] Figure 3 The structure of a magnetic switch 31 is shown as an example. The magnetic switch 31 has a spring, a contact and a conductive voltage plate 33 inside. The conductive voltage plate is pressed against the contact under the elastic force of the spring to ensure that the magnetic switch 31 is in the on state. At this time, the circuit is turned on, and the oil filling control switch K1 is disconnected and has the function of selecting the direction of the current. An armature 34 is connected to the bottom of the conductive voltage plate 33 in the magnetic switch 31. When the magnetic device 13 on the piston plate moves to the position set on the capacity scale 32 of the magnetic switch 31, the magnetic device 13 attracts the armature 34 to overcome the spring force, and the conductive voltage plate 44 is pulled away from the contact under the action of magnetism. At this time, the circuit is disconnected, and the motor 22 is powered off and stopped, so that the amount of lubricating oil added can be quantitatively controlled, making the maintenance quality more precise and controllable.

[0093] In some possible implementations of the embodiments of the present application, the oil nozzle 11 includes: an anti-leakage oil nozzle 14 and a joint 15;

[0094] like Figure 4 As shown, a slot 141 is provided at one end of the anti-leakage nozzle 14, and a through hole 142 is provided at the bottom of the slot 141 and penetrates to the other end of the anti-leakage nozzle;

[0095] A spring 143 and a blocking bead 144 fixed to one end of the spring are arranged in the slot 141; the spring 143 is used to press the blocking bead 144 against the through hole 142; the diameter of the blocking bead 144 is larger than the diameter of the through hole 142;

[0096] like Figure 5 As shown, a passage 151 is provided in the middle of the joint 15 and runs from one end of the joint 15 to the other end; a small hole 152 that runs through the passage is provided on a side wall at one end of the joint 15;

[0097] One end of the connector 15 can be inserted into the through hole 142 and compress the spring 143 to move the blocking bead 144 away from the through hole 142 .

[0098] It should be noted that the internal spring 143 of the anti-leakage oil nozzle 14 presses the blocking ball 144 against the through hole 142, and the grease is sealed by the spring 143 and the blocking ball 144, which can prevent the lubricating oil from leaking from the anti-leakage oil nozzle 14 and ensure that the oil will not leak from the oil nozzle 11 when not in use.

[0099] It should also be noted that the anti-leakage nozzle 14 is used in conjunction with the connector 15. Several small holes 142 are opened on the bottom side of the connector 15. When the connector 15 is installed on the anti-leakage nozzle 14, the bottom of the connector 15 presses down the plugging bead 144 inside the anti-leakage nozzle 14. The through hole 142 is connected, and the lubricating oil can flow out from the small holes 142 at the bottom of the connector 15 along the channel 151.

[0100] In an example, Figure 5 As shown, the other end of the connector 15 is a quick-connect design 153 for installing a hose. No thread tightening or other connection methods are required. The hose can be directly sleeved on the top of the connector 15 to achieve a reliable connection.

[0101] The specific working process of a lubricating oil filling tool for an electric actuator in a nuclear power plant provided by an embodiment of the present application is described in detail below with reference to a specific example.

[0102] The working process of a lubricating oil filling tool for an electric actuator of a nuclear power plant provided in an embodiment of the present application is as follows:

[0103] First, adjust the magnetic switch 31 to the required position indicated by the capacity scale 32. Push the electric switch 22, and the motor 22 is powered to drive the oil pump 23 to operate. The oil pump 23 injects the lubricating oil in the oil box 1 into the electric actuator. As the lubricating oil in the oil box 1 decreases, the piston plate 12 moves. When the magnetic device 14 on the piston plate 12 passes the magnetic switch 31 with a set position, the armature 34 action circuit is cut off, and the motor 22 stops. On the contrary, the oil box 1 can be refilled with oil.

[0104] The present application is described in detail above in conjunction with the accompanying drawings and embodiments, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present application. Any content not described in detail in the present application can adopt the existing technology.

Claims

1. A lubricating oil filling tool for electric actuators in nuclear power plants, characterized in that: The lubricating oil filling tool comprises: an oil box, a filling component and a quantitative component; The oil box is used to contain lubricating oil; an oil nozzle is provided on the oil box, and a piston plate is installed inside; the piston plate moves according to the amount of lubricating oil in the oil box; The filling assembly is connected to the oil nozzle and is used to control the lubricating oil in the oil box to be output through the oil nozzle; The quantitative component is used to control the action of the filling component according to the position of the piston plate and the set lubricating oil filling amount; The filling assembly is also used to control the lubricating oil to be sucked from the oil nozzle into the oil box; The filling assembly comprises: a control circuit, a motor and an oil pump; The motor is connected to the oil pump; the oil pump is connected to the oil nozzle via a hose; The control circuit is used to control the action of the motor to drive the oil pump to rotate forward or reverse; The control circuit includes: a driving power supply and an oil injection control switch; The driving power supply is connected to the motor via the oil injection control switch; the oil injection control switch includes three control positions: oil suction position, oil injection position and stop position; When the oil filling control switch is in the oil suction position, the driving power source controls the motor to rotate, driving the oil pump to suck the lubricating oil into the oil box; when the oil filling control switch is in the oil filling position, the driving power source controls the motor to rotate in the opposite direction, driving the oil pump to suck the lubricating oil out of the oil box; when the oil filling control switch is in the stop position, the link between the driving power source and the motor is cut off; The quantitative component includes: a magnetic switch, a metal guide rail and a capacity scale; The metal guide rail is connected in series between the driving power source and the motor; The magnetic switch is slidably mounted on the metal guide rail to cut off or connect the link between the driving power source and the motor; The magnetic switch is also connected to the capacity scale, and a pointer is provided on the top of the magnetic switch for pointing to the number on the capacity scale to indicate the amount of lubricating oil in the oil box; The piston plate is provided with a magnetic device for controlling the magnetic switch to be disconnected.

2. The lubricating oil filling tool for electric actuators in nuclear power plants according to claim 1, characterized in that: The lubricating oil filling tool further includes: a housing; The oil box, the filling assembly and the quantitative assembly are all installed inside the housing; The housing is provided with a handle, and the oil filling control switch is mounted on the handle.

3. The lubricating oil filling tool for electric actuators in nuclear power plants according to claim 2, characterized in that: The oil filling control switch is a double-pole triple-throw switch.

4. The lubricating oil filling tool for electric actuators in nuclear power plants according to claim 1, characterized in that: The piston plate is provided with two sealing rings, which are pressed tightly between the piston plate and the inner wall of the oil box to ensure reliable sealing of the lubricating oil in the oil box.

5. The lubricating oil filling tool for electric actuators in nuclear power plants according to claim 4, characterized in that: The piston plate is also provided with a guide bar, which is located between the two sealing rings and is used to keep the piston plate stable during movement.

6. The lubricating oil filling tool for electric actuators in nuclear power plants according to claim 1, characterized in that: The oil nozzle comprises: an anti-leakage oil nozzle and a joint; A slot is provided at one end of the anti-leakage nozzle, and a through hole is provided at the bottom of the slot that penetrates to the other end of the anti-leakage nozzle; A spring and a blocking bead fixed to one end of the spring are arranged in the slot; the spring is used to press the blocking bead tightly against the through hole; A passage is provided in the middle of the joint, which passes through one end of the joint to the other end; a small hole is provided on the side wall of one end of the joint, which passes through the passage; One end of the connector can be inserted into the through hole and compress the spring to move the blocking bead away from the through hole.

7. The lubricating oil filling tool for electric actuators in nuclear power plants according to claim 6, characterized in that: The other end of the connector is a quick-connect design for installing a hose.

8. The lubricating oil filling tool for electric actuators in nuclear power plants according to claim 1, characterized in that: The oil box is provided with a driving handle connected to the piston plate, which is used to manually drive the piston plate to move so as to fill and output the lubricating oil.

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