A fault early warning device for oil-immersed transformer
By designing an oil-immersed transformer fault early warning device that includes a collection component and an early warning component, the device uses changes in the viscosity of insulating oil to determine the degree of deterioration and provide early warning. This solves the problem of high cost of existing devices and achieves low-cost and effective monitoring and early warning of insulating oil deterioration.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN ZD NEW MATERIALS CO LTD
- Filing Date
- 2025-08-30
- Publication Date
- 2026-07-31
AI Technical Summary
Existing fault warning devices for oil-immersed transformers are expensive and cannot provide early warnings of the degree of insulation oil deterioration, leading to an increased risk of equipment failure.
Design a fault early warning device that includes a collection component and an early warning component. By combining an oil pipeline and a transparent oil storage bottle, the device uses the viscosity change of the insulating oil to determine the degree of deterioration and uses an infrared beam sensor and a PLC controller to provide early warning.
It achieves low-cost and effective monitoring and early warning of insulating oil degradation, reduces the risk of equipment failure, and is unaffected by electromagnetic interference. The cost is only 10%-20% of that of online monitoring equipment.
Smart Images
Figure CN224582103U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil-immersed transformer technology, and specifically to a fault early warning device for oil-immersed transformers. Background Technology
[0002] An oil-immersed transformer is a transformer that uses oil as its primary insulation medium. It relies on oil as a cooling medium, such as oil-immersed self-cooling, oil-immersed air cooling, oil-immersed water cooling, and forced oil circulation. The main components of a transformer include the core, windings, oil tank, and oil conservator.
[0003] After prolonged use, the insulating oil in oil-immersed transformers ages and becomes contaminated due to various reasons. This change is collectively referred to as insulating oil degradation. As degradation deepens, the insulating properties of the oil decrease, eventually failing to meet the insulation requirements for transformer operation, leading to short circuits and transformer failure. To avoid this, regular oil quality testing is typically required. However, this testing method is not only cumbersome but also time-consuming, making it impossible to monitor the degree of insulating oil degradation in advance or provide early warnings.
[0004] Commonly used electronic testing equipment, such as various sensors, needs to be inserted into the oil tank during use. In the complex environment inside the oil tank, the sensors need to overcome the effects of high temperature and temperature fluctuations, corrosion and contamination of the insulating oil medium, and signal distortion caused by strong electromagnetic interference. Therefore, the requirements for the sensors are high, which leads to high cost. Hence, a fault early warning device for oil-immersed transformers is proposed to solve the above-mentioned problems. Utility Model Content
[0005] Based on the above description, this utility model provides a fault early warning device for oil-immersed transformers to solve the problem of high cost of existing fault early warning devices.
[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a fault early warning device for an oil-immersed transformer, comprising: at least three collection components and one early warning component; The collection assembly includes a triggering unit, a one-way locking unit, and a transparent oil storage bottle. The triggering unit is connected to the oil tank of the transformer body through an oil pipeline, and a one-way locking unit is installed inside the triggering unit. The transparent oil storage bottle is connected to the triggering unit and is used to store insulating oil with different degrees of deterioration. The triggering unit is used to determine the degree of deterioration of the insulating oil and to allow the insulating oil that meets the requirements to flow into the transparent oil storage bottle. The early warning component is located on the outside of the transparent oil storage bottle to monitor and warn whether the inside of the transparent oil storage bottle is filled with insulating oil.
[0007] Based on the above technical solution, the present invention can be further improved as follows.
[0008] Furthermore, the oil pipeline includes a main pipe and at least three branch pipes. The main pipe is connected to the oil tank of the transformer body, and three branch pipes are equidistantly arranged on the outer surface. The branch pipes are connected to the main pipe.
[0009] Furthermore, the triggering unit includes a connecting cylinder, which is sleeved outside the branch pipe and communicates with the branch pipe. A damping valve body is provided at the top of the connecting cylinder, and a filter cylinder is provided inside the connecting cylinder between the damping valve body and the branch pipe. A top cover is provided at the top of the damping valve body, and a connecting member is provided between the top cover and the damping valve body. A pre-tightening spring and a viscosity-sensitive piston are arranged sequentially from top to bottom at the bottom end of the connecting member. The side of the top cover is communicated with the transparent oil storage bottle through a pipe, and the pre-tightening force of the three pre-tightening springs increases sequentially along the direction of the main pipe.
[0010] Furthermore, the filter cylinder includes a hollow cylinder body, the top of which is provided with multiple flow gaps and the circumferential surface is provided with multiple side mounting holes. A top filter screen is provided inside the side mounting holes, and a side filter screen located below the flow gaps is provided inside the hollow cylinder body. The hollow cylinder body is interconnected with the branch pipe, that is, insulating oil flows into the interior of the hollow cylinder body through the branch pipe.
[0011] Furthermore, the damping valve body includes a hollow valve body, the bottom of which is provided with a threaded cylinder, the threaded cylinder being threadedly connected to and communicating with the connecting cylinder, and a sealing ring being provided between the damping valve body and the connecting cylinder.
[0012] Furthermore, the hollow valve body has a threaded connection hole, a piston movement chamber, and a flow guide chamber arranged sequentially from top to bottom inside. The inner diameters of the threaded connection hole, piston movement chamber, and flow guide chamber increase sequentially, and adjacent sides are stepped. The flow guide chamber and piston movement chamber are provided with side holes on their sides. The two side holes are distributed vertically and are interconnected through a connecting side pipe. A connector is provided on the outside of the hollow valve body, and the connector is engaged with the transparent oil storage bottle.
[0013] Furthermore, the connecting component includes a connecting vertical tube, an annular plate is sleeved on the outside of the connecting vertical tube, the annular plate is disposed inside the threaded connection hole and is tightly fitted with the bottom wall of the top cover, the connecting vertical tube extends into the inside of the top cover and communicates with the piston movement chamber, and a preload spring is provided at the bottom of the annular plate.
[0014] Furthermore, the viscosity-sensitive piston includes a piston block, a connecting block, and an inverted conical block arranged sequentially from top to bottom. The diameter of the piston block is larger than the diameter of the connecting block, and the piston block and the connecting block are located inside the piston movement chamber and the flow guiding chamber, respectively. An O-ring is fitted on the outside of the connecting block. The O-ring is tightly fitted to the inner wall of the flow guiding chamber and is located below the side hole below.
[0015] Furthermore, the one-way locking unit includes a check spring, the top of which is connected to the top wall inside the top cover, and a sealing ball is provided at the bottom of the check spring. The sealing ball is tightly fitted to the top of the connecting vertical pipe, and its outer diameter is larger than the inner diameter of the connecting vertical pipe, so as to seal the connecting vertical pipe.
[0016] Furthermore, the warning component includes an infrared beam sensor, a PLC controller, and a buzzer. The transmitting and receiving ends of the infrared beam sensor are respectively located on both sides of a transparent oil storage bottle. The pre-tightening spring in the triggering unit, which is connected to the transparent oil storage bottle, is the pre-tightening spring with the largest pre-tightening force. The infrared beam sensor is connected to the buzzer through the PLC controller to control the on / off state of the buzzer.
[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. This utility model, by setting at least three collection components and oil pipelines, etc., through the cooperation between the oil pipelines and collection components, when the oil inside the transformer main tank deteriorates, the viscosity of the deteriorated insulating oil will change, and thus the upward thrust generated by the viscosity-sensitive piston will be different in the same environment. Therefore, the insulating oil with different degrees of deterioration flows into the interior of different transparent oil storage bottles after passing through the collection components at different positions. On the one hand, the degree of deterioration of the insulating oil can be controlled by directly observing the state of the insulating oil in the transparent oil storage bottle. On the other hand, the degree of deterioration of the insulating oil can also be determined by observing which transparent oil storage bottle contains insulating oil. 2. By configuring the early warning component, the early warning component works in conjunction with the transparent oil storage bottle. When insulating oil flows into the transparent oil storage bottle, which is used to store the most severely degraded oil, the infrared beam sensor transmits the signal to the PLC controller, and an early warning is issued through the buzzer. Attached Figure Description
[0018] Figure 1 A schematic diagram of the structure of a fault early warning device for an oil-immersed transformer provided for an embodiment of this utility model; Figure 2 for Figure 1 Structural sectional view; Figure 3 for Figure 2 Another structural diagram from a different perspective; Figure 4 for Figure 3 A magnified view of a portion of region A in the middle; Figure 5 This is a schematic diagram of the damping valve body in an embodiment of the present invention; Figure 6 for Figure 5 Another structural diagram from a different perspective; Figure 7 This is a schematic diagram of the filter cylinder in an embodiment of the present invention; Figure 8 This is a schematic diagram of the connecting member in an embodiment of the present utility model; Figure 9 This is a schematic diagram of the viscosity-sensitive piston in an embodiment of the present invention; The attached diagram lists the components represented by each number as follows: 1. Transformer body; 2. Oil pipeline; 3. Connecting cylinder; 4. Damping valve body; 41. Hollow valve body; 42. Threaded cylinder; 43. Threaded connection hole; 44. Piston movement chamber; 45. Flow guiding chamber; 46. Side hole; 47. Connecting side pipe; 48. Connecting piece; 5. Filter cylinder; 51. Hollow cylinder body; 52. Flow notch; 53. Side mounting hole; 54. Side filter screen; 55. Top filter screen; 6. Top cover; 7. Connecting piece; 71. Connecting vertical pipe; 72. Annular plate; 8. Preload spring; 9. Viscosity-sensitive piston; 91. Piston block; 92. Connecting block; 93. O-ring seal; 94. Inverted cone block; 10. Check spring; 11. Sealing ball; 12. Transparent oil storage bottle; 13. Infrared beam sensor. Detailed Implementation
[0019] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.
[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
[0021] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.
[0022] Please see Figures 1-4 A fault early warning device for an oil-immersed transformer includes: at least three collection components and one early warning component; The collection assembly includes a triggering unit, a one-way locking unit, and a transparent oil storage bottle 12. The triggering unit is connected to the oil tank of the transformer body 1 via an oil supply pipe 2, and a one-way locking unit is installed inside the triggering unit. The transparent oil storage bottle 12 is connected to the triggering unit and is used to store insulating oil with different degrees of deterioration. The triggering unit is used to determine the degree of deterioration of the insulating oil and to allow the insulating oil that meets the requirements to flow into the transparent oil storage bottle 12. The oil supply pipe 2 includes a main pipe and at least three branch pipes. The main pipe is connected to the oil tank of the transformer body 1, and three branch pipes are equidistantly arranged on the outer surface. The branch pipes are connected to the main pipe. The early warning component is located on the outside of the transparent oil storage bottle 12 and is used to monitor and warn whether the inside of the transparent oil storage bottle 12 is filled with insulating oil. Based on the above, the transformer body 1 is an oil-immersed transformer in the prior art, which includes an oil tank filled with insulating oil. When the insulating oil ages during use, its viscosity changes. During the process of new oil to old oil, the viscosity gradually increases. When the device is put into use, after the new oil triggers the first triggering unit, the new oil enters the first transparent oil storage bottle 12. Similarly, when the insulating oil initially ages, it enters the second transparent oil storage bottle 12. When the insulating oil further ages, it enters the third transparent oil storage bottle 12. In the above process, the one-way locking unit effectively seals the transparent oil storage bottle 12. When the insulating oil enters the transparent oil storage bottle 12, it cannot flow out of the transparent oil storage bottle 12 under the action of the one-way locking unit, and can also prevent the subsequent aging insulating oil from entering it.
[0023] like Figure 3 and Figure 4As shown, the triggering unit includes a connecting cylinder 3, which is sleeved on the outside of the branch pipe and communicates with the branch pipe. A damping valve body 4 is provided on the top of the connecting cylinder 3. A filter cylinder 5 is provided inside the connecting cylinder 3 between the damping valve body 4 and the branch pipe. A top cover 6 is provided on the top of the damping valve body 4. A connecting piece 7 is provided between the top cover 6 and the damping valve body 4. A pre-tightening spring 8 and a viscosity-sensitive piston 9 are arranged sequentially from top to bottom at the bottom of the connecting piece 7. The side of the top cover 6 is communicated with the transparent oil storage bottle 12 through a pipe. The pre-tightening force of the three pre-tightening springs 8 increases sequentially along the direction of the main pipe. Based on the above, the trigger unit is equipped with warning springs with different preloads. When the insulating oil enters the damping valve body 4 through the connecting cylinder 3, the insulating oil with different aging degrees has different viscosities, so the insulating oil exerts different upward thrusts on the viscosity-sensitive piston 9. When the insulating oil enters the transparent oil storage bottle 12 through the trigger unit, under the combined action of the insulating oil pressure and the one-way locking unit, the trigger unit that cooperates with the transparent oil storage bottle 12 is locked, that is, the insulating oil in the transparent oil storage bottle 12 cannot flow out. By setting at least three collection components, that is, by three pre-tensioning springs 8 with different pre-tensioning forces, the insulating oil corresponding to the three triggering units is aged to different degrees, that is, the triggering unit can only be triggered when it is aged to the corresponding degree. New oil has a viscosity of approximately 20-30 mm² / s, lightly aged oil has a viscosity of 30-50 mm² / s, and heavily aged oil has a viscosity of ≥50 mm² / s. The preload of the preload springs 8 of the three triggering units is set in a gradient of "5N / m→15N / m→25N / m", which corresponds to the viscosity thresholds of new oil, lightly aged oil and deeply aged oil respectively. When the viscosity of the insulating oil reaches a certain threshold, the upward thrust (F=viscosity×flow velocity×piston force area) of the viscosity-sensitive piston 9 when it flows through the flow guide cavity 45 can overcome the elastic force of the corresponding preload spring, push the piston upward, and make the oil flow into the corresponding transparent oil storage bottle 12.
[0024] like Figure 4 and Figure 7 As shown, the filter cylinder 5 includes a hollow cylinder 51. The top of the hollow cylinder 51 is provided with multiple flow gaps 52, and multiple side mounting holes 53 are provided on the circumferential surface. A top filter screen 55 is provided inside the side mounting holes 53. A side filter screen 54 located below the flow gaps 52 is provided inside the hollow cylinder 51. The hollow cylinder 51 is interconnected with the branch pipe, that is, insulating oil flows into the interior of the hollow cylinder 51 through the branch pipe. Based on the above, the filter cylinder 5 effectively filters the insulating oil, trapping debris inside the filter cylinder 5. The insulating oil that enters the hollow cylinder 51 is filtered by the side filter screen 54 and the top filter screen 55, and then flows into the damping valve body 4 through the flow opening 52.
[0025] like Figures 3-6 As shown, the damping valve body 4 includes a hollow valve body 41, and a threaded cylinder 42 is provided at the bottom of the hollow valve body 41. The threaded cylinder 42 is threadedly connected to the connecting cylinder 3 and communicates with the connecting cylinder 3. A sealing ring is provided between the damping valve body 4 and the connecting cylinder 3. The hollow valve body 41 has a threaded connection hole 43, a piston movement chamber 44, and a flow guide chamber 45 arranged sequentially from top to bottom inside. The inner diameters of the threaded connection hole 43, the piston movement chamber 44, and the flow guide chamber 45 increase sequentially, and the adjacent side is stepped. The flow guide chamber 45 and the piston movement chamber 44 are both provided with side holes 46 on their sides. The two side holes 46 are distributed vertically and are connected to each other through a connecting side pipe 47. The hollow valve body 41 is provided with a connector 48 on its exterior, and the connector 48 is engaged with the transparent oil storage bottle 12. Based on the above, the threaded cylinder 42 allows the damping valve body 4 to be connected to the connecting cylinder 3 via a threaded connection, and the threaded connection hole 43 allows the top cover 6 to be connected to the damping valve body 4 via a threaded connection. The piston movement chamber 44 allows the viscosity-sensitive piston 9 to move vertically within it, and the side hole 46 and the connecting side tube 47 serve to connect the piston movement chamber 44 and the guide chamber 45 from the side. When the viscosity-sensitive piston 9 is positioned inside the piston movement chamber 44 under the action of the preload spring 8, the lower side hole 46 is blocked, meaning that the insulating oil cannot flow from the guide chamber 45 into the side hole 46. At this time, the insulating oil is temporarily stored inside the guide chamber 45, and the connector 48 serves to fix the transparent oil storage bottle 12.
[0026] like Figure 4 , Figure 8 As shown, the connecting member 7 includes a connecting vertical tube 71, and an annular plate 72 is sleeved on the outside of the connecting vertical tube 71. The annular plate 72 is disposed inside the threaded connection hole 43 and is tightly fitted to the bottom wall of the top cover 6. The connecting vertical tube 71 extends into the interior of the top cover 6 and communicates with the piston movement chamber 44. A preload spring 8 is provided at the bottom of the annular plate 72. like Figure 9As shown, the viscosity-sensitive piston 9 includes a piston block 91, a connecting block 92, and an inverted conical block 94 arranged sequentially from top to bottom. The diameter of the piston block 91 is larger than the diameter of the connecting block 92. The piston block 91 and the connecting block 92 are located inside the piston movement chamber 44 and the flow guiding chamber 45, respectively. An O-ring seal 93 is fitted around the outside of the connecting block 92. The O-ring seal 93 fits tightly against the inner wall of the flow guiding chamber 45 and is located below the side hole 46. Based on the above, the connecting part 7 serves to connect the top cover 6 and the damping valve body 4, and the connecting vertical pipe 71 enables the one-way locking unit to block it, thereby changing the state between the top cover 6 and the damping valve body 4 from the connected state to the blocked state. When insulating oil is introduced into it, the blocked state can be changed back to the connected state. The setting of viscosity-sensitive piston 9 and preload spring 8 ensures that when the viscosity of insulating oil entering the guide cavity 45 is insufficient, it cannot generate a sufficiently large upward thrust, thus preventing the insulating oil from flowing above the viscosity-sensitive piston 9. When the thrust is sufficient, the viscosity-sensitive piston 9 moves upward, causing the lower side hole 46 to open. The inverted cone block 94 makes the thrust on the viscosity-sensitive piston 9 more stable.
[0027] like Figure 3 and Figure 4 As shown, the one-way locking unit includes a check spring 10. The top of the check spring 10 is connected to the top wall inside the top cover 6, and a sealing ball 11 is provided at the bottom of the check spring 10. The sealing ball 11 is tightly fitted to the top of the connecting vertical pipe 71, and its outer diameter is larger than the inner diameter of the connecting vertical pipe 71, so as to seal the connecting vertical pipe 71. Based on the above, the sealing ball 11 blocks the connecting vertical pipe 71 under the action of the check spring 10. When enough insulating oil flows into the connecting vertical pipe 71, the sealing ball 11 separates from the connecting vertical pipe 71 under the action of upward pushing force, so that the insulating oil can enter the interior of the top cover 6 and flow into the interior of the transparent oil storage bottle 12. When the interior of the transparent oil storage bottle 12 is full of insulating oil, due to the disappearance of the hydraulic pressure difference, the sealing ball 11 re-blocks the connecting vertical pipe 71 under the action of downward elastic force of the check spring 10, thereby preventing the insulating oil from flowing out of the transparent oil storage bottle 12.
[0028] like Figure 1As shown, the warning component includes an infrared beam sensor 13 (preferably an E3Z-T61 sensor), a PLC controller (preferably an S7-200 controller), and a buzzer. The transmitting and receiving ends of the infrared beam sensor 13 are respectively located on both sides of a transparent oil storage bottle 12. The pre-tensioning spring 8 in the triggering unit connected to the transparent oil storage bottle 12 is the pre-tensioning spring 8 with the largest pre-tensioning force. The infrared beam sensor 13 is connected to the buzzer through the PLC controller to control the on / off state of the buzzer. Based on the above, the infrared beam sensor 13 monitors the transparent oil storage bottle 12. When the transparent oil storage bottle 12, which is used to store the insulating oil with the highest degree of aging, is full of insulating oil, the infrared beam sensor 13 transmits the signal to the PLC controller, and the PLC controller triggers the buzzer to perform an alarm operation.
[0029] In summary, this fault warning device, by setting up pre-tensioning springs 8 with different pre-tensioning forces corresponding to new oil, lightly aged oil, and deeply aged insulating oil respectively, utilizes the characteristic that the viscosity of insulating oil increases after aging, so that the insulating oil flows into the transparent oil storage bottle 12 for storage after aging to a certain extent. On the one hand, it is convenient for staff to directly observe the color of the insulating oil in the transparent oil storage bottle 12 for judgment, and on the other hand, by observing which of the three transparent oil storage bottles 12 has insulating oil flowing into it, it is also possible to determine which stage the insulating oil is in, i.e., passive warning; This collection component monitors the state of the insulating oil inside the tank through a simple mechanical structure. Compared to expensive online monitoring equipment, the cost is only 10%-20% of that of online monitoring equipment. Furthermore, this mechanical structure can withstand complex environments such as electromagnetic interference and has a significantly increased service life. It can be used in conjunction with early warning components when needed to achieve proactive early warning effects.
[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A fault early warning device for oil immersed transformers, characterized in that, include: At least three collection components and one early warning component; The collection assembly includes a triggering unit, a one-way locking unit, and a transparent oil storage bottle (12). The triggering unit is connected to the oil tank of the transformer body (1) through an oil supply pipe (2), and a one-way locking unit is provided inside the triggering unit. The transparent oil storage bottle (12) is connected to the triggering unit, and the transparent oil storage bottle (12) is used to store insulating oil with different degrees of deterioration. The triggering unit is used to determine the degree of deterioration of the insulating oil and to allow the insulating oil that meets the requirements to flow into the transparent oil storage bottle (12). The warning component is located on the outside of the transparent oil storage bottle (12) to monitor and warn whether the inside of the transparent oil storage bottle (12) is filled with insulating oil.
2. The failure warning device according to claim 1, characterized by The oil pipeline (2) includes a main pipe and at least three branch pipes. The main pipe is connected to the oil tank of the transformer body (1), and three branch pipes are equidistantly arranged on the outer surface. The branch pipes are connected to the main pipe.
3. The failure warning device according to claim 2, characterized by The triggering unit includes a connecting cylinder (3), which is sleeved on the outside of the branch pipe and communicates with the branch pipe. A damping valve body (4) is provided on the top of the connecting cylinder (3). A filter cylinder (5) is provided inside the connecting cylinder (3) between the damping valve body (4) and the branch pipe. A top cover (6) is provided on the top of the damping valve body (4). A connecting piece (7) is provided between the top cover (6) and the damping valve body (4). A pre-tightening spring (8) and a viscosity-sensitive piston (9) are arranged sequentially from top to bottom at the bottom end of the connecting piece (7). The side of the top cover (6) is connected to the transparent oil storage bottle (12) through a pipe. The pre-tightening force of the three pre-tightening springs (8) increases sequentially along the direction of the main pipe.
4. The failure warning device according to claim 3, characterized by The filter cylinder (5) includes a hollow cylinder (51). The top of the hollow cylinder (51) is provided with multiple flow gaps (52), and multiple side mounting holes (53) are provided on the circumferential surface. A top filter screen (55) is provided inside the side mounting holes (53), and a side filter screen (54) located below the flow gaps (52) is provided inside the hollow cylinder (51). The hollow cylinder (51) is connected to the branch pipe, that is, the insulating oil flows into the interior of the hollow cylinder (51) through the branch pipe.
5. The apparatus of claim 3, wherein The damping valve body (4) includes a hollow valve body (41), and a threaded cylinder (42) is provided at the bottom of the hollow valve body (41). The threaded cylinder (42) is threadedly connected to the connecting cylinder (3) and communicates with the connecting cylinder (3). A sealing ring is provided between the damping valve body (4) and the connecting cylinder (3).
6. The apparatus of claim 5, wherein, The hollow valve body (41) is provided with a threaded connection hole (43), a piston movement chamber (44) and a flow guide chamber (45) from top to bottom. The inner diameters of the threaded connection hole (43), the piston movement chamber (44) and the flow guide chamber (45) increase sequentially, and the adjacent side is stepped. The flow guide chamber (45) and the piston movement chamber (44) are provided with side holes (46) on their sides. The two side holes (46) are distributed vertically and are connected to each other through a connecting side pipe (47). The hollow valve body (41) is provided with a connector (48) on its outside. The connector (48) is engaged with the transparent oil storage bottle (12).
7. The apparatus of claim 6, wherein, The connecting component (7) includes a connecting vertical tube (71), and an annular plate (72) is sleeved on the outside of the connecting vertical tube (71). The annular plate (72) is located inside the threaded connection hole (43) and is tightly fitted to the bottom wall of the top cover (6). The connecting vertical tube (71) extends into the interior of the top cover (6) and is interconnected with the piston movement chamber (44). A preload spring (8) is provided at the bottom of the annular plate (72).
8. The apparatus of claim 6, wherein, The viscosity-sensitive piston (9) includes a piston block (91), a connecting block (92), and an inverted cone block (94) arranged sequentially from top to bottom. The diameter of the piston block (91) is larger than the diameter of the connecting block (92). The piston block (91) and the connecting block (92) are located inside the piston movement chamber (44) and the flow guiding chamber (45), respectively. An O-ring (93) is sleeved on the outside of the connecting block (92). The O-ring (93) is tightly fitted to the inner wall of the flow guiding chamber (45) and is located below the side hole (46).
9. The apparatus of claim 7, wherein, The one-way locking unit includes a check spring (10), the top of which is connected to the top wall inside the top cover (6), and a sealing ball (11) is provided at the bottom of the check spring (10). The sealing ball (11) is tightly fitted to the top of the connecting vertical pipe (71), and its outer diameter is larger than the inner diameter of the connecting vertical pipe (71) to seal the connecting vertical pipe (71).
10. The apparatus of claim 7, wherein, The warning component includes an infrared beam sensor (13), a PLC controller, and a buzzer. The transmitting end and receiving end of the infrared beam sensor (13) are respectively located on both sides of a transparent oil storage bottle (12). The pre-tightening spring (8) in the trigger unit that is connected to the transparent oil storage bottle (12) is the pre-tightening spring (8) with the largest pre-tightening force. The infrared beam sensor (13) is connected to the buzzer through the PLC controller to control the on / off state of the buzzer.