A negative pressure monitoring device for a steam turbine lubricating oil tank

Abstract

The utility model relates to lubricating oil tank negative pressure detection technical field especially relates to a steam turbine lubricating oil tank negative pressure monitoring device, oil tank body, the both sides of oil tank body's outside front and back are all fixedly connected with mount frame, the outside fixed connection of mount frame has negative pressure detector, the outside slide connection of mount frame has wire clamping mechanism, the top fixed connection of oil tank body has injection pipe, the inside fixed connection of injection pipe has anti -leak mechanism, wire clamping mechanism includes slide block, the outside slide connection of slide block in the outside of mount frame. The utility model provides a steam turbine lubricating oil tank negative pressure monitoring device, through the flexible adjustment and fixed of slide block on the mount frame, cooperate wire clamping ring to the firm clamping of negative pressure detector wire harness, make wire harness be stable restraint in the safety area, avoided because wire harness scattered and involved equipment operation part and led to wire harness to pull off, insulating layer breakage problem, cut off the inducement of short circuit or signal interruption from the source.

Description

Technical Field

[0001] This utility model relates to the field of lubricating oil tank negative pressure detection technology, and in particular to a steam engine lubricating oil tank negative pressure monitoring device. Background Technology

[0002] The negative pressure detection device is a device that monitors the negative pressure value in a closed space in real time through sensors and can issue an early warning when the value is abnormal. It features high detection accuracy and fast response speed. Its core function is to ensure the stability of the negative pressure environment in the closed system and avoid malfunctions caused by abnormal pressure. It is closely connected to the turbine lubricating oil tank. The turbine lubricating oil tank needs to maintain a certain negative pressure to prevent the lubricating oil from splashing out due to excessive pressure, generating foam, or being contaminated by external impurities. The negative pressure detection device is the key to ensuring that the negative pressure environment of the oil tank meets the standards and ensuring the normal operation of the turbine lubrication system.

[0003] In existing technologies, some negative pressure detection devices for turbine lubricating oil tanks utilize pressure sensors to collect real-time air pressure signals inside the tank. The sensor converts the collected air pressure physical quantity into an electrical signal, which is then transmitted to a matching signal processing unit. This unit amplifies and filters the electrical signal before sending it to the controller. The controller compares the real-time air pressure value with a preset negative pressure standard threshold. If the detected value is lower than the threshold, the controller immediately triggers an alarm module, alerting personnel through an audible and visual alarm.

[0004] In practical use, some turbine lubricating oil tank negative pressure detection devices may have messy wiring harnesses that get tangled in the moving parts of the equipment, causing the wiring harness to break, the insulation layer to be damaged, and short circuits or signal interruptions to occur. If the damaged wiring harness comes into contact with high-temperature components or oil mist, it may generate electric sparks due to leakage, igniting the oil mist and causing an oil tank fire. Messy wiring harnesses may also block key interfaces or operating buttons of the equipment, and maintenance personnel may accidentally touch them in an emergency, leading to operational errors.

[0005] Therefore, it is necessary to provide a new type of negative pressure monitoring device for steam engine lubricating oil tanks to solve the above-mentioned technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a negative pressure monitoring device for a steam engine lubricating oil tank.

[0007] The present invention provides a negative pressure monitoring device for a gas turbine lubricating oil tank, comprising: an oil tank body, mounting brackets fixedly connected to the front and rear sides of the oil tank body, a negative pressure detector fixedly connected to the outside of the mounting brackets, a wire clamping mechanism slidably connected to the outside of the mounting brackets, an injection pipe fixedly connected to the top of the oil tank body, and an anti-leakage mechanism fixedly connected inside the injection pipe. The wire clamping mechanism includes a sliding block, which is slidably connected to the outside of the mounting frame. A mounting block is fixedly connected to the outside of the sliding block. A cavity is formed inside the mounting block, and multiple telescopic rods are fixedly connected inside the cavity. A return spring is sleeved on the outside of each telescopic rod. A limit plate is fixedly connected to the outside of the telescopic rod, and a wire clamping ring is fixedly connected to the outside of the limit plate. A fixing rod is fixedly connected to the outside of the mounting frame, and the outside of the fixing rod is clamped to the outside of the sliding block. A detection component is fixedly connected to the outside of the negative pressure detector.

[0008] Preferably, the detection component includes an output pump, the output pump is externally fixedly connected to the upper and lower ends of the negative pressure detector, the output end of the output pump is fixedly connected to a pressure tapping pipe, the other end of the pressure tapping pipe is fixedly connected to a detection connector, and the detection connector is externally fixedly connected to the outside of the oil tank body.

[0009] Preferably, a connecting rod is fixedly connected to the outer side of the two pressure-sensing tubes, and a pressure gauge is fixedly connected to the outside of the connecting rod.

[0010] Preferably, the leak-proof mechanism includes a cross-shaped placement plate, which is externally fixedly connected to the bottom of the injection tube. A mounting housing is fixedly connected to the top of the cross-shaped placement plate. A sliding rod is fixedly connected inside the mounting housing. A mounting spring is sleeved on the outside of the sliding rod. A sealing assembly is fixedly connected to the outside of the sliding rod.

[0011] Preferably, the sealing assembly includes a sealing plate, the outer side of which is fixedly connected to the outer top end of the sliding rod, and a sealing ring is fixedly connected inside the injection tube, with the outer side of the sealing plate in contact with the outer side of the sealing ring.

[0012] Preferably, the outer side of the sealing plate is slidably connected to the inside of the injection tube, and the outer side of the sealing plate is in contact with the outer side of the mounting housing.

[0013] Preferably, the inner part of the limiting plate is slidably connected to the inside of the mounting block, and the outer part of the wire clamping ring is slidably connected to the inside of the mounting block.

[0014] Preferably, one end of the reset spring is fixedly connected to the outside of the limiting plate, and the other end of the reset spring is fixedly connected to the inside of the mounting block.

[0015] Compared with related technologies, the negative pressure monitoring device for a steam engine lubricating oil tank provided by this utility model has the following advantages: This invention utilizes the flexible adjustment and fixation of the sliding block on the mounting frame, combined with the secure clamping ring to firmly hold the negative pressure detector wiring harness, to stably constrain the wiring harness within a safe area. This avoids problems such as wire harness breakage and insulation damage caused by the wiring harness scattering and getting caught in the operating parts of the equipment, thus cutting off the cause of short circuits or signal interruptions at the source.

[0016] This invention effectively isolates external dust and impurities through a sealed injection pipe, preventing them from entering the oil tank and contaminating the lubricating oil. This ensures oil cleanliness, avoids equipment wear and malfunctions caused by oil contamination, and extends the service life of the equipment. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of a negative pressure monitoring device for a steam turbine lubricating oil tank provided by this utility model; Figure 2 for Figure 1 The diagram shown is a structural schematic of the negative pressure detector. Figure 3 for Figure 2 Enlarged view of point A in the image; Figure 4 for Figure 1 The diagram shown is a structural schematic of the fuel tank. Figure 5 for Figure 4 Enlarged view of point B in the image.

[0018] The following are the labels in the diagram: 1. Oil tank body; 2. Mounting bracket; 3. Negative pressure detector; 4. Sliding block; 5. Mounting block; 6. Cavity; 7. Telescopic rod; 8. Return spring; 9. Limiting plate; 10. Cable clamping ring; 11. Fixing rod; 12. Output pump; 13. Pressure tapping pipe; 14. Detection connector; 15. Connecting rod; 16. Pressure gauge; 17. Injection pipe; 18. Cross placement plate; 19. Mounting housing; 20. Sliding rod; 21. Mounting spring; 22. Sealing plate; 23. Sealing ring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0020] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0021] Please see Figures 1 to 5A negative pressure monitoring device for a gas turbine lubricating oil tank includes: an oil tank body 1, which provides a storage space for lubricating oil and is treated with anti-corrosion measures to prevent rusting of the inner wall and contamination of the oil; mounting brackets 2 are fixedly connected to the front and rear sides of the oil tank body 1; a negative pressure detector 3 is fixedly connected to the outside of the mounting brackets 2 to monitor the negative pressure value inside the oil tank body 1 in real time; the sensor converts the pressure signal into an electrical signal, and the display screen shows the value intuitively; when the negative pressure exceeds the preset range, a wire clamping mechanism is slidably connected to the outside of the mounting brackets 2; an injection pipe 17 is fixedly connected to the top of the oil tank body 1 to replenish lubricating oil into the oil tank; a flange interface facilitates connection to the oil injection pipe; a leak-proof mechanism ensures that the pipe is sealed after oil injection to prevent air from entering the oil tank and disrupting the negative pressure environment, while also preventing lubricating oil leakage and waste; and a leak-proof mechanism is fixedly connected inside the injection pipe 17. The wire clamping mechanism includes a sliding block 4, which drives the wire clamping assembly to move. The sliding block 4 can adjust its position along the sliding groove of the mounting frame 2 to adapt to wires of different lengths, ensuring that the wires are neat and not excessively stretched. The quenching treatment improves wear resistance and extends service life. The sliding block 4 is externally slidably connected to the outside of the mounting frame 2. The sliding block 4 is externally fixedly connected to a mounting block 5. The mounting block 5 has a cavity 6 inside. The core function of the cavity 6 is to provide installation space for the telescopic rod 7, the return spring 8 and the limiting plate 9, restrict the movement direction of the internal components, and ensure that the wire clamping ring 10 can only extend and retract in the horizontal direction to accurately clamp the wire. Multiple telescopic rods 7 are fixedly connected inside the cavity 6. The telescopic rods 7 are externally fitted with return springs 8. The telescopic rods 7 restrict the springs to extend and retract in the axial direction to avoid twisting. The spring force is transmitted to the wire clamping ring 10 through the limiting plate 9, so that the wire clamping ring 10 can adapt to wires of different diameters, clamping the wires without damaging the outer sheath. The telescopic rods 7 are externally fixedly connected to the limiting plate 9, and the limiting plate 9 is externally fixedly connected to the wire clamping ring 10. The elasticity of the rubber ring allows it to conform to the surface of the circuit, increasing friction and preventing slippage. The semi-circular design facilitates insertion and removal of the circuit. The oil-resistant material adapts to the oily environment around the tank, preventing aging and cracking. The mounting bracket 2 is externally fixed with a fixing rod 11. After the cable clamping mechanism is adjusted to the appropriate position, tightening the fixing rod 11 causes its end to embed into the positioning groove of the sliding block 4, restricting the movement of the sliding block 4 and ensuring the circuit position is stable and unaffected by equipment vibration. The external of the fixing rod 11 is locked to the external of the sliding block 4. The external of the negative pressure detector 3 is also fixed. A detection component is fixedly connected, including an output pump 12. The output pump 12 is externally fixedly connected to the upper and lower ends of the negative pressure detector 3. The output end of the output pump 12 is fixedly connected to a pressure tapping pipe 13. The other end of the pressure tapping pipe 13 is fixedly connected to a detection connector 14, which establishes a communication channel between the pressure tapping pipe 13 and the oil tank. A filter screen is installed inside the connector to prevent impurities in the oil tank from entering the pressure tapping pipe 13 and clogging the pipeline, ensuring smooth gas flow and accurate detection data. The detection connector 14 is externally fixedly connected to the outside of the oil tank body 1.

[0022] A connecting rod 15 is fixedly connected to the outer side of the two pressure-sensing pipes 13, which enhances the structural stability of the pressure-sensing pipes 13. Connecting the two pressure-sensing pipes 13 into a whole prevents them from shaking or colliding due to equipment vibration or airflow disturbance, and prevents loosening and leakage of the joints. It also makes the pipeline layout more organized and facilitates identification of the lines during later maintenance. A pressure gauge 16 is fixedly connected to the outside of the connecting rod 15, providing a clear pressure backup display. This forms a dual monitoring system with the negative pressure detector 3; when the negative pressure detector 3 experiences an electronic malfunction, the pressure gauge 16 can serve as an emergency indicator. For urgent reference, to ensure operators can promptly grasp the negative pressure status of the oil tank, the leak-proof mechanism includes a cross-shaped placement plate 18, which is externally fixedly connected to the bottom of the injection pipe 17. A mounting housing 19 is fixedly connected to the top of the cross-shaped placement plate 18, and a sliding rod 20 is fixedly connected inside the mounting housing 19. A mounting spring 21 is sleeved on the outside of the sliding rod 20. When not injecting oil, the spring force pushes the sealing plate 22 to fit against the sealing ring 23 to achieve a seal. When injecting oil, the oil pressure overcomes the spring force, pushing the sealing plate 22 downwards, allowing oil to pass through the gap. The oil flows into the oil tank. After the oil filling is completed, the spring automatically resets and seals, requiring no manual operation. A sealing assembly is fixedly connected to the outside of the sliding rod 20. The sealing assembly includes a sealing plate 22, which is fixedly connected to the top of the sliding rod 20. A sealing ring 23 is fixedly connected to the inside of the injection pipe 17. Under the action of the spring, the sealing plate 22 presses the sealing ring 23 upward, causing the rubber sealing gasket to elastically deform and fill the micro-gaps on the sealing surface, preventing air from entering the oil tank from the top of the injection pipe. During oil filling, the sealing plate moves downward, and the oil flows from the sealing plate 22 to the injection pipe 17. The oil flows through the gap in the inner wall and quickly resets the seal after the oil injection is completed, ensuring that the negative pressure environment of the oil tank is not affected. The outside of the sealing plate 22 is in contact with the outside of the sealing ring 23. The outside of the sealing plate 22 is slidably connected to the inside of the injection pipe 17. The outside of the sealing plate 22 is in contact with the outside of the mounting housing 19. The inside of the limiting plate 9 is slidably connected to the inside of the mounting block 5. The outside of the wire clamping ring 10 is slidably connected to the inside of the mounting block 5. One end of the reset spring 8 is fixedly connected to the outside of the limiting plate 9, and the other end of the reset spring 8 is fixedly connected to the inside of the mounting block 5.

[0023] The working principle of the negative pressure monitoring device for a steam turbine lubricating oil tank provided by this utility model is as follows: First, check whether the negative pressure detectors 3 on the mounting brackets 2 on the front and rear sides of the fuel tank body 1 are in normal standby mode, and ensure that the connection between the pressure pipe 13 and the fuel tank body 1 is not loose, and that the pointer of the pressure gauge 16 is zero. Then, tidy up and fix the external wiring harness of the negative pressure detector 3, push the sliding block 4 of the wire clamping mechanism to make the sliding block 4 slide outside the mounting bracket 2, adjust the sliding block 4 to a position that facilitates wire clamping, and use the fixing rod 11 outside the mounting bracket 2 to clamp the sliding block 4, thereby fixing the position of the sliding block 4 and preventing displacement during subsequent wire clamping.

[0024] After fixing the sliding block 4, perform the wire harness clamping operation. Place the wire harness of the negative pressure detector 3 into the opening outside the mounting block 5, and then press the wire clamping ring 10 into the cavity 6. The wire clamping ring 10 drives the limiting plate 9 to move deeper into the cavity 6. The limiting plate 9 pushes the telescopic rod 7 to retract, and at the same time, the return spring 8 sleeved on the outside of the telescopic rod 7 is compressed, generating a return force. When the wire clamping ring 10 moves to the appropriate position, put the wire harness completely into the inside of the wire clamping ring 10, and slowly release the wire clamping ring 10. Under the action of the return force, the return spring 8 pushes the limiting plate 9 to move in the opposite direction, and the limiting plate 9 drives the wire clamping ring 10 to firmly clamp the wire harness. At this time, the telescopic rod 7 gradually extends to its initial state under the action of the limiting plate 9, and the wire clamping ring 10 stably fixes the wire harness, preventing the wire harness from becoming messy and scattered, and preventing it from getting caught in the moving parts of the equipment or obstructing critical operating parts.

[0025] When lubricating oil needs to be injected into the oil tank body 1, the anti-leakage mechanism is activated to complete the oil injection operation. The oil injection pipe is aligned with the top opening of the injection pipe 17 and inserted. The oil injection pipe pushes the sealing plate 22 downwards, causing the external sliding rod 20 of the sealing plate 22 to slide downwards inside the mounting housing 19. The mounting spring 21 outside the sliding rod 20 is compressed, generating a restoring force. As the sealing plate 22 moves downwards, its external seal gradually disengages from the sealing ring 23 inside the injection pipe 17, opening the channel of the injection pipe 17. At this time, lubricating oil can be injected into the oil tank body 1 through the oil injection pipe. The cross-shaped placement plate 18 at the bottom of the injection pipe 17 provides stable support for the mounting housing 19, ensuring the stability of all components of the anti-leakage mechanism during the oil injection process.

[0026] After the lubricating oil is injected, the oil injection pipe is pulled out. The external force on the sealing plate 22 disappears, and the mounting spring 21 pushes the sliding rod 20 upward under the action of the reset elastic force. The sliding rod 20 drives the sealing plate 22 to move in the opposite direction until the outside of the sealing plate 22 is in tight contact with the outside of the sealing ring 23 again, thus achieving a seal on the injection pipe 17. At this time, the outside of the sealing plate 22 remains in contact with the outside of the mounting housing 19, and the sliding rod 20 returns to its initial position. The anti-leakage mechanism effectively prevents the lubricating oil inside the oil tank body 1 from leaking through the injection pipe 17, while also preventing external impurities from entering the oil tank body 1 through the injection pipe 17 and contaminating the oil.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A negative pressure monitoring device for a steam turbine lubricating oil tank, characterized in that, include: The tank body (1) has mounting brackets (2) fixedly connected to both the front and rear sides of the tank body (1). A negative pressure detector (3) is fixedly connected to the outside of the mounting brackets (2). A wire clamping mechanism is slidably connected to the outside of the mounting brackets (2). An injection pipe (17) is fixedly connected to the top of the tank body (1). An anti-leakage mechanism is fixedly connected inside the injection pipe (17). The wire clamping mechanism includes a sliding block (4), which is slidably connected to the outside of the mounting frame (2). A mounting block (5) is fixedly connected to the outside of the sliding block (4). A cavity (6) is opened inside the mounting block (5). Multiple telescopic rods (7) are fixedly connected inside the cavity (6). A return spring (8) is sleeved on the outside of the telescopic rod (7). A limit plate (9) is fixedly connected to the outside of the telescopic rod (7). A wire clamping ring (10) is fixedly connected to the outside of the limit plate (9). A fixing rod (11) is fixedly connected to the outside of the mounting frame (2). The outside of the fixing rod (11) is clamped to the outside of the sliding block (4). A detection component is fixedly connected to the outside of the negative pressure detector (3).

2. The negative pressure monitoring device for a steam turbine lubricating oil tank according to claim 1, characterized in that, The detection component includes an output pump (12), which is externally fixedly connected to the upper and lower ends of the negative pressure detector (3). The output end of the output pump (12) is fixedly connected to a pressure tapping pipe (13), and the other end of the pressure tapping pipe (13) is fixedly connected to a detection connector (14). The external end of the detection connector (14) is fixedly connected to the outside of the oil tank body (1).

3. The negative pressure monitoring device for a steam turbine lubricating oil tank according to claim 2, characterized in that, A connecting rod (15) is fixedly connected to the outer side of the two pressure tubes (13), and a pressure gauge (16) is fixedly connected to the outer side of the connecting rod (15).

4. The negative pressure monitoring device for a steam turbine lubricating oil tank according to claim 1, characterized in that, The leak prevention mechanism includes a cross-shaped placement plate (18), which is externally fixedly connected to the bottom of the injection pipe (17). A mounting housing (19) is fixedly connected to the top of the cross-shaped placement plate (18). A sliding rod (20) is fixedly connected inside the mounting housing (19). A mounting spring (21) is sleeved on the outside of the sliding rod (20). A sealing assembly is fixedly connected to the outside of the sliding rod (20).

5. The negative pressure monitoring device for a steam turbine lubricating oil tank according to claim 4, characterized in that, The sealing assembly includes a sealing plate (22), the outer side of which is fixedly connected to the outer top of the sliding rod (20), and a sealing ring (23) is fixedly connected inside the injection tube (17). The outer side of the sealing plate (22) is in contact with the outer side of the sealing ring (23).

6. The negative pressure monitoring device for a steam turbine lubricating oil tank according to claim 5, characterized in that, The outer side of the sealing plate (22) is slidably connected to the inside of the injection tube (17), and the outer side of the sealing plate (22) is in contact with the outer side of the mounting housing (19).

7. The negative pressure monitoring device for a steam turbine lubricating oil tank according to claim 1, characterized in that, The inner side of the limiting plate (9) is slidably connected to the inside of the mounting block (5), and the outer side of the wire clamping ring (10) is slidably connected to the inside of the mounting block (5).

8. The negative pressure monitoring device for a steam turbine lubricating oil tank according to claim 1, characterized in that, One end of the reset spring (8) is fixedly connected to the outside of the limiting plate (9), and the other end of the reset spring (8) is fixedly connected to the inside of the mounting block (5).

Images