Air discharging and supplementing system of hydraulic power plant oil pressure device

Abstract

The utility model discloses an air discharging and supplementing system of an oil pressure device of a hydraulic power plant, which comprises a plurality of oil level sensors and pressure sensors arranged on an oil pressure tank, the oil level sensors and the pressure sensors are in communication connection with an LCU control block, and the LCU control block controls automatic opening and closing of an automatic air discharging and supplementing pipeline according to information detected by the oil pressure sensors and the pressure sensors. The automatic gas discharging and supplementing pipeline is externally provided with a manual gas discharging and supplementing pipeline, switching between an automatic gas discharging and supplementing path and a manual gas discharging and supplementing path can be achieved, the reliability of the whole device can be improved, the maintenance workload is reduced, stable operation of a unit is guaranteed, and therefore safe production of an electric power system is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of air-bleeding and air-recharging system of water and electricity plant oil pressure device. BACKGROUND

[0002] Oil pressure device is one of important auxiliary equipment in hydropower station and factory, its task is to store and constantly provide operating oil meeting quality requirements to speed regulation system, to carry out unit start, stop, automatic load regulation operation etc., when the pressure of pressure oil tank drops to specified value due to oil supply, it needs to be recharged by automatic air-recharging device, so as to ensure the pressure of pressure oil, and air-recharging equipment is needed when recharging. In order to provide high-pressure air source for air-recharging, high-pressure air equipment needs to be specially configured, and most of the current hydropower stations still use manual air-recharging mode for air-recharging, air-recharging is frequent in operation, and if supervision is not in place in daily operation, it will lead to safety hazard that speed regulator cannot work normally in case of serious imbalance of oil-gas ratio. SUMMARY

[0003] The utility model aims at providing a kind of air-bleeding and air-recharging system of water and electricity plant oil pressure device, can realize the switching of two paths of automatic air-bleeding and air-recharging and manual air-bleeding and air-recharging, can improve the reliability of the whole device, reduce maintenance workload, ensure stable operation of unit, so as to ensure the safe production of power system.

[0004] In order to achieve the above purpose, the utility model adopts the technical scheme that a kind of air-bleeding and air-recharging system of water and electricity plant oil pressure device, including multiple oil level sensors and pressure sensors arranged on oil pressure tank, the oil level sensor and pressure sensor are communicated with LCU control block, and the automatic opening and closing of automatic air-bleeding and air-recharging pipeline is controlled by LCU control block through oil pressure sensor and pressure sensor detection information, and the automatic air-bleeding and air-recharging pipeline is externally provided with manual air-bleeding and air-recharging pipeline.

[0005] Further, the automatic air-bleeding and air-recharging pipeline includes main pipeline, the main pipeline is provided with first electromagnetic valve and one-way valve flowing to oil pressure tank in one direction, when oil level sensor detects that oil level in oil pressure tank rises to upper limit and pressure sensor detects that oil pressure is lower than rated value, LCU control block controls first electromagnetic valve to start and realizes automatic air-recharging.

[0006] Further, the main pipeline is also provided with first manual valve, second manual valve and first exhaust pipeline, the first manual valve is arranged in front of first electromagnetic valve, the second manual valve is arranged between one-way valve and oil pressure tank, the first exhaust pipeline is arranged between one-way valve and second manual valve, the first exhaust pipeline is provided with second electromagnetic valve, and the first manual valve and second manual valve belong to normally open state.

[0007] Further, a second exhaust pipeline is arranged between the one-way valve and the second manual valve, and the second exhaust pipeline is provided with a manual exhaust valve.

[0008] Further, the manual exhaust and supplement pipeline comprises a branch pipeline, one end of the branch pipeline is connected with the main pipeline through a third manual valve and is arranged in front of the first manual valve, and the other end of the branch pipeline is communicated with the main pipeline and is arranged between the first electromagnetic valve and the one-way valve.

[0009] Further, the main pipeline port is provided with a clamping disc, the oil tank is provided with a clamp support, the clamp support is provided with a rubber strip towards the inner wall of the oil tank, the clamp support is provided with a limiting seat, the limiting seat is provided with a placing groove for placing the clamping disc, the placing groove is provided with an abutting plate, and the abutting plate is fixed with the limiting seat through a positioning latch.

[0010] Further, the end surface of the clamping disc towards the oil tank is provided with a detection part for detecting the sealing degree of the connection between the main pipeline and the oil tank, the detection part comprises an elastic air bag fixedly connected to the clamping disc, the elastic air bag extends an annular sealing ring towards the end surface of the oil tank, and the annular sealing ring is sealingly bonded between the elastic air bag and the oil tank, a plurality of adjustable pressing rods corresponding to the annular sealing ring are arranged on the abutting plate and the limiting seat, the end of the pressing rod is provided with an arc-shaped block, and the arc-shaped block is pressed on the annular sealing ring through the adjustable pressing rod.

[0011] Further, the air inlet end of the main pipeline is connected with the air compressor through a filter, the filter comprises a shell, the two side edges of the shell are provided with connecting ports, the bottom of the shell is provided with a sealing cover, and the shell is provided with a flexible filter part and / or a rigid filter part inside, and the filter parts are used for intercepting particulate matters in the air.

[0012] Further, the flexible filter part comprises a first winding end arranged at the upper end of the shell and a second winding end arranged at the sealing cover, the first winding end is provided with a flexible filter screen, the two ends of the first winding end are provided with clamping pieces for limiting the rotation of the first winding end, one end of the flexible filter screen is connected with the second winding end, the second winding end is provided with a rotating rod, the two side edges of the flexible filter screen are limited through the limiting clamping grooves of the shell, the rotating rod is rotated by releasing the clamping pieces, and the switching of new and old flexible filter screens is realized.

[0013] Advantages:

[0014] 1. The automatic exhaust and supplement pipeline and the manual exhaust and supplement pipeline are arranged, the switching of the automatic exhaust and supplement pipeline and the manual exhaust and supplement pipeline can be realized, the reliability of the whole device can be improved, the maintenance workload can be reduced, the stable operation of the unit can be ensured, and the safe production of the power system can be ensured.

[0015] 2、The application is provided with a reinforcing and detecting part at the connection part of the pipeline and the oil pressure tank, which can avoid the problems of air leakage caused by loosening of the connection part due to vibration of the unit in the prior art.

[0016] 3、The application is provided with a filter between the air compressor and the main pipeline, which can strengthen the filtration of air, avoid the accumulation of particulate matters caused by the shell entering the oil pressure tank, affect the oil quality in the tank body and cause failure of the valve body in the air supplement process BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of example one;

[0018] Figure 2 is a side view of example two;

[0019] Figure 3 is a schematic view of example two;

[0020] Figure 4 is a schematic view of example three;

[0021] Figure 5 is a front view of the hard filter part;

[0022] Figure 6 is a side view of the flexible filter part.

[0023] The drawings show that: 1, oil pressure tank; 2, oil level sensor; 3, pressure sensor; 4, LCU control block; 5, automatic air exhaust and supplement pipeline; 51, main pipeline; 52, first electromagnetic valve; 6, first manual valve; 7, second manual valve; 8, one-way valve; 9, first exhaust pipeline; 91, second electromagnetic valve; 10, second exhaust pipeline; 101, manual exhaust valve; 11, manual exhaust and supplement pipeline; 111, branch pipeline; 112, third manual valve; 12, clamping disc; 13, clamping support; 14, limit seat; 15, placing groove; 16, abutting plate; 17, detecting part; 171, elastic air bag; 172, annular sealing ring; 18, adjustable pressing rod; 19, arc block; 20, filter; 201, shell; 202, sealing cover; 21, flexible filter part; 211, first rolling end; 212, second rolling end; 213, flexible filter screen; 214, clamping piece; 215, rotating rod; 22, hard filter part. DETAILED DESCRIPTION

[0024] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0025] Referring to the drawings, Figure 1As shown, the application provides a water power plant oil pressure device air exhaust and air supply system, which comprises a plurality of oil level sensors 2 and pressure sensors 3 arranged on an oil tank 1, the oil level sensors 2 and the pressure sensors 3 are in communication connection with an LCU control block 4, the LCU control block 4 is part of a computer monitoring system, corresponding intelligent control of the equipment is realized through the computer, corresponding information is detected through the oil level sensors 2 and the pressure sensors 3, the oil level sensors 2 are used to detect information such as that the oil level in the oil tank 1 is at an excessively low oil level, a low oil level, a normal oil level or an excessively high oil level, the pressure sensors 3 are used to detect that the pressure in the oil tank is normal, excessively low or excessively high, the LCU control block 4 controls the automatic opening and closing of the automatic exhaust and air supply device pipeline through the information detected by the oil level sensors 2 and the pressure sensors 3, a manual exhaust and air supply pipeline is externally arranged on the automatic exhaust pipeline, when the automatic exhaust pipeline fails, air supply and air exhaust can be realized through the operation of the manual exhaust and air supply pipeline 11, thereby maintaining the balance of the oil pressure in the oil tank 1.

[0026] Specifically, the automatic exhaust and air supply pipeline 5 comprises a main pipeline 51, the main pipeline 51 is provided with a first electromagnetic valve 52 and a one-way valve 8 for unidirectional flow to the oil tank 1, the one-way valve is arranged for gas backflow, and is further provided with a first manual valve 6, a second manual valve 7 and a first exhaust pipeline 9, the first manual valve 6 is arranged in front of the first electromagnetic valve 52, the second manual valve 7 is arranged between the one-way valve 8 and the oil tank 1, the first manual valve 6 and the second manual valve 7 are both in a normally open state, the first exhaust pipeline 9 is provided with a second electromagnetic valve 91, the second electromagnetic valve 91 and the first electromagnetic valve 52 are in opposite states on the automatic exhaust and air supply pipeline, when the oil level sensor 2 detects that the oil level in the oil tank 1 rises to the upper limit and the pressure sensor 3 detects that the oil pressure is lower than the rated value, the LCU control block 4 controls the first electromagnetic valve 52 to open and the second electromagnetic valve 91 to close, thereby realizing automatic air supply, the maximum working pressure of the governor oil pressure device of the applicant is 4.0Mpa, the rated value is set to 3.8Mpa, and when it is lower than 3.8Mpa, automatic air supply is started.

[0027] When air exhaust is needed, the first electromagnetic valve 52 is closed and the second electromagnetic valve 91 is opened, due to the arrangement of the one-way valve 8, gas can only be exhausted through the first exhaust pipeline 9, the first exhaust pipeline 9 is further provided with a fourth manual valve, the fourth manual valve is used to close the first exhaust pipeline 9 for non-use after the second electromagnetic valve 91 is damaged, air exhaust is realized through a second exhaust pipeline 10, the second exhaust pipeline 10 is provided with a manual exhaust valve 101.

[0028] Although the automation reduces manual labor operation, in order to improve safety, the manual air exhaust pipeline is arranged on the main pipeline 51, including branch pipeline 111, one end of branch pipeline 111 is connected with main pipeline 51 through third manual valve 112 and is distributed in front of first manual valve 6, the other end of branch pipeline 111 is communicated with main pipeline 51 and is distributed between first electromagnetic valve 52 and check valve 8, when manual air exhaust is needed, electromagnetic valve is closed and first manual valve 6 is closed, third manual valve 112 is opened, manual exhaust valve 101 is closed, and gas is passed through third manual valve 112, check valve 8 and second manual valve 7 into oil tank 1, when exhaust is needed, manual exhaust valve 101 is opened, and third manual valve 112 is closed.

[0029] Referring to as Figure 2 、 Figure 3 The utility model also provides second embodiment, and second embodiment is basically same with first embodiment, and the difference only is: the main pipeline 51 port is equipped with the clamping disc 12, oil tank 1 is equipped with the tight lap support 13, and the tight lap support 13 is equipped with rubber strip towards the inner wall of oil tank 1, and the tight lap support 13 is equipped with the limiting seat 14, and the limiting seat 14 is equipped with the placing groove 15 for placing clamping disc 12, and the placing groove 15 is equipped with the abutting plate 16, and the abutting plate 16 is fixed with limiting seat 14 through the positioning bolt.

[0030] On the basis of above-mentioned embodiment, the end surface of clamping disc 12 towards oil tank 1 is equipped with detection part 17, and detection part 17 is used for detecting the sealing degree of main pipeline 51 and the connecting place of oil tank 1, and detection part 17 includes the elastic air bag 171 fixedly connected on clamping disc 12, and the elastic air bag 171 extends the annular sealing ring 172 towards the end surface of oil tank 1 and is sealedly bonded between annular sealing ring 172 and oil tank 1, and the abutting plate 16 and limiting seat 14 are equipped with multiple groups of adjustable pressure rods corresponding to annular sealing ring 172, and the end of pressure rod is equipped with arc block 19, and arc block 19 is pressed on annular sealing ring 172 through adjustable pressure rod.

[0031] The improvement is that: due to the vibration generated during long-time operation of the unit, the main pipeline 51 is prone to looseness at the connection with the oil tank 1, and part of the gas is prone to running out. Therefore, the application is provided with a clamping disc 12 at the port of the main pipeline 51, and the oil tank 1 is provided with a clamping support 13, which is an annular plate connected and clamped on the periphery of the oil tank 1 through a connecting piece, and in order to prevent loosening, a rubber strip is embedded in the inner wall of the clamping support 13. (The clamping support 13 is prior art and will not be described here), the limiting seat 14 is arranged on the clamping support, the limiting seat 14 is provided with a placing groove 15 for placing the clamping disc 12, the abutting plate 16 is arranged on the placing groove 15, the abutting plate 16 is fixed with the limiting seat 14 through the positioning latch, the clamping disc 12 is limited between the placing groove 15 and the abutting plate 16, and the disconnection of the main pipeline 51 is avoided. The end face of the abutting plate 16 facing the clamping disc 12 can be provided with a spring telescopic rod for certain buffering and energy dissipation, and the compression degree of the spring telescopic rod can also be used to judge whether the main pipeline 51 is disconnected. In order to further detect whether there is gas leakage, the end face of the clamping disc 12 facing the oil tank 1 is provided with a detection part 17, the detection part 17 includes an elastic air bag 171 fixedly connected to the clamping disc 12, the elastic air bag 171 extends an annular sealing ring 172 towards the end face of the oil tank 1, and the annular sealing ring 172 is sealingly bonded between the oil tank 1, the abutting plate 16 and the limiting seat 14 correspond to the annular sealing ring 172 and are provided with a plurality of adjustable pressing rods 18, the adjustable pressing rods 18 are first threaded rods and second sleeve rods, the first threaded rods are rotatably connected to the abutting plate 16 or the limiting seat 14, the second sleeve rods are provided with arc blocks 19, the arc blocks 19 are elastic and are convenient for adhering to the outer wall of the oil tank 1. The arc blocks 19 are pressed on the annular sealing ring 172 through length adjustment of the first threaded rods and the sleeve rods, when gas leakage occurs, the elastic air bag 171 will expand, and the staff adjusts the connection between the main pipeline 51 and the oil tank 1 according to the expansion of the elastic air bag 171, so as to ensure the fastening and sealing degree.

[0032] As Figure 4 , Figure 5 indicated, the application also provides a third embodiment, which is basically the same as the first embodiment and the second embodiment, and the difference is that: the air inlet end of the main pipeline 51 is connected with the air compressor through a filter 20, the filter 20 includes a shell 201, the shell 201 is provided with connecting ports on both sides, the shell 201 is provided with a sealing cover 202 at the bottom, and the shell 201 is provided with a flexible filter part 21 and / or a rigid filter part 22 inside, which intercepts particulate matter in the air.

[0033] Based on the above embodiments, the flexible filter section 21 includes a first rolling end 211 disposed on the upper end of the housing 201 and a second rolling end 212 disposed on the sealing cover 202. The first rolling end 211 is provided with a flexible filter screen 213 and both ends of the first rolling end 211 are provided with clips 214 that restrict the rotation of the first rolling end 211. The second rolling end 212 is connected to one end of the flexible filter screen 213 and is provided with a rotating rod 215. The two sides of the flexible filter screen 213 are limited by the limiting slots of the housing 201. The new and old flexible filter screens 213 are switched by disengaging the rotating rod 215 through the clips 214.

[0034] The specific improvements are as follows: A filter element 20 is installed between the air inlet end of the main pipeline 51 and the air compressor. The filter element 20 includes a housing 201, with connection ports on both sides of the housing 201 and a sealing cover 202 at the bottom of the housing 201. When cleaning the filter element 20 as a whole, the inside of the housing 201 is cleaned by opening the sealing cover 202. The housing 201 has connection ports on both sides and a flexible filter section 21 and / or a rigid filter section 22 inside the housing 201. One or both of the flexible filter section 21 and the rigid filter section 22 can be selected to enhance the filtration function, and the selection is based on actual needs. The rigid filter section 22 is a filter plate, which is snapped into the inside of the housing 201. After a period of use, the filter plate is removed through the sealing cover 202 for cleaning and then reinstalled.

[0035] like Figure 6 As shown, the flexible filter section 21 includes a first rotating end 211 disposed on the upper end of the housing 201 and a second rotating end 212 disposed on the sealing cover 202. The first rotating end 211 is provided with a flexible filter screen 213, and both ends of the first rotating end 211 are provided with clips 214 to restrict the rotation of the first rotating end 211. The second rotating end 212 is connected to one end of the filter screen, and the second rotating end 212 is provided with a rotating rod 215. When the filtration performance of this part of the flexible filter screen 213 is poor, the clips 214 are disengaged, and the rotating rod 215 is rotated. 15. The used flexible filter screen 213 is wound up through the second winding end 212. The unused flexible filter screen 213 is arranged inside the housing 201. The two sides of the flexible filter screen 213 are limited by the limiting slots of the housing 201 to avoid deformation of the flexible filter screen 213. The flexible filter part 21 can be used for a long time. After a period of use, the flexible filter screen 213 can be taken out for cleaning or replaced and reinstalled on the first winding end 211 and the second winding end 212 for reuse.

[0036] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make minor changes or modifications to the disclosed technical content, or make equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change or modification of the above embodiments, which does not depart from the technical solution of the present application, is still within the scope of the technical solution of the present application.

Claims

1. A venting and air charging system for an oil pressure device of a hydroelectric power plant, characterized by: The application relates to an oil level sensor (2) and a pressure sensor (3) arranged on an oil tank (1), wherein the oil level sensor (2) and the pressure sensor (3) are connected with an LCU control block (4), information is detected through the oil level sensor and the pressure sensor (3), and the LCU control block (4) controls automatic opening and closing of an automatic air charging and discharging pipeline (5) according to the information. The automatic air charging and discharging pipeline (5) comprises a main pipeline (51), the main pipeline (51) is provided with a first electromagnetic valve (52) and a one-way valve (8) for unidirectional flow to the oil tank (1), when the oil level sensor (2) detects that the oil level in the oil tank (1) rises to an upper limit and the pressure sensor (3) detects that the oil pressure is lower than a rated value, the LCU control block (4) controls the first electromagnetic valve (52) to start automatic air charging.

2. The air bleed system of the hydraulic plant of a hydroelectric power plant according to claim 1, characterized in that: The main pipeline (51) is further provided with a first manual valve (6), a second manual valve (7) and a first exhaust pipeline (9), the first manual valve (6) is arranged in front of the first electromagnetic valve (52), the second manual valve (7) is arranged between the one-way valve (8) and the oil tank (1), the first exhaust pipeline (9) is arranged between the one-way valve (8) and the second manual valve (7), the first exhaust pipeline (9) is provided with a second electromagnetic valve (91), and the first manual valve (6) and the second manual valve (7) belong to a normally open state.

3. The air bleed system of the hydraulic plant of a hydroelectric power plant according to claim 2, characterized in that: The one-way valve (8) and the second manual valve (7) are further provided with a second exhaust pipeline (10), the second exhaust pipeline (10) is provided with a manual exhaust valve (101), and when the first exhaust pipeline (9) fails, air is discharged through the second exhaust pipeline (10).

4. The air bleed system of the hydraulic plant of the hydroelectric power plant according to claim 3, characterized in that: The manual air charging and discharging pipeline comprises a branch pipeline (111), one end of the branch pipeline (111) is connected with the main pipeline (51) through a third manual valve (112) and is arranged in front of the first manual valve (6), and the other end of the branch pipeline (111) is communicated with the main pipeline (51) and is arranged between the first electromagnetic valve (52) and the one-way valve (8).

5. The air bleed system of the hydraulic plant of the hydroelectric power plant according to claim 4, characterized in that: A clamping disc (12) is arranged at a port of the main pipeline (51), a clamping support (13) is arranged on the oil tank (1), a rubber strip is arranged on the clamping support (13) and faces the inner wall of the oil tank (1), a limiting seat (14) is arranged on the clamping support (13), the limiting seat (14) is provided with a placing groove (15) for placing the clamping disc (12), a pressing plate (16) is arranged on the placing groove (15), and the pressing plate (16) is fixed with the limiting seat (14) through a positioning bolt.

6. The air bleed system of the hydraulic plant of the hydroelectric power plant according to claim 5, characterized in that: The clamping disc (12) is provided with a detection part (17) on the end face of the oil tank (1), which is used to detect the sealing degree of the main pipeline (51) and the oil tank (1) connection part, and the detection part (17) comprises an elastic air bag (171) fixedly connected on the clamping disc (12), the elastic air bag (171) extends an annular sealing ring (172) towards the end face of the oil tank (1), and the annular sealing ring (172) is sealingly bonded with the oil tank (1), the abutting plate (16) and the limiting seat (14) correspond to the annular sealing ring (172) and are provided with a plurality of adjustable pressing rods, the end of the pressing rod is provided with an arc-shaped block (19), and the arc-shaped block (19) is pressed on the annular sealing ring (172) through the adjustable pressing rod.

7. The air bleed system of the hydraulic plant of a hydroelectric power plant according to claim 4 or 6, characterized in that: The air inlet end of the main pipeline (51) is connected with the air compressor through a filter (20), the filter (20) comprises a shell (201), the two side edges of the shell (201) are provided with connecting ports, the bottom of the shell (201) is provided with a sealing cover (202), the shell (201) is provided with a flexible filter part (21) and / or a rigid filter part (22) inside, and the particulate matters in the air are intercepted.

8. The air bleed system of the hydraulic plant of the hydroelectric power plant according to claim 7, characterized in that: The flexible filter part (21) comprises a first rolling end (211) arranged on the upper end of the shell (201) and a second rolling end (212) arranged on the sealing cover (202), the first rolling end (211) is provided with a flexible filter screen (213), and the two ends of the first rolling end (211) are provided with clamping pieces (214) for limiting the rotation of the first rolling end (211), one end of the flexible filter screen (213) is connected with the second rolling end (212), and the second rolling end (212) is provided with a rotating rod (215), the two side edges of the flexible filter screen (213) are limited by the limiting clamping grooves of the shell (201), and the old and new flexible filter screens (213) are switched by rotating the rotating rod (215) through the clamping pieces (214).

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