Redundant system structure for improving reliability of hydraulic valve

Abstract

The utility model relates to a redundant system structure capable of improving reliability of hydraulic valves, oil supply pipelines of two hydraulic systems are connected through a tee joint, and each tee joint circulation end of the tee joint is provided with an oil supply valve which is used for enabling the hydraulic system to control a hydraulic cylinder in the other hydraulic system. The hydraulic system has the advantages that the flexibility of equipment operation is achieved through redundancy optimization design of the system, independent operation can be achieved through simple operation isolation, control over a hydraulic cylinder in the other hydraulic system by the hydraulic system can also be achieved, and on the premise that the safety of the system is guaranteed during operation, the safety of the system is guaranteed. The hydraulic system in normal operation is not disturbed, interconnection and intercommunication of the hydraulic system are achieved on the premise that the complexity of the system is not increased as much as possible, and it is conveniently guaranteed that effective operation of the hydraulic cylinder is still maintained in the fault maintenance process of part of the hydraulic system.

Description

Technical Field

[0001] The utility model relates to the field of industrial automation control, and particularly includes a redundant system structure for improving the reliability of hydraulic valves. Background Art

[0002] The hydraulic butterfly valve at the outlet of the fourth-stage circulating water pump is provided with hydraulic oil to perform the opening and closing actions. Each hydraulic butterfly valve corresponds to a set of hydraulic power systems. The components of this hydraulic system are complex and consist of numerous solenoid valves, oil pumps, and oil filters. When a certain set of hydraulic systems fails, the entire hydraulic system must be stopped, and the corresponding butterfly valve cannot be controlled to open and close normally, resulting in the unit losing the backup of a set of circulating water pumps.

[0003] Therefore, it is urgent to propose a hydraulic valve system structure to overcome the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a hydraulic valve system structure at the outlet of the circulating water pump.

[0005] In this redundant system structure for improving the reliability of hydraulic valves, two hydraulic systems are respectively used to control the hydraulic cylinders of a butterfly valve. Each hydraulic cylinder is respectively connected with two oil supply pipelines, and the two oil supply pipelines are respectively used to control the hydraulic cylinder to move in different directions;

[0006] The oil supply pipelines between the two hydraulic systems are connected through a tee. Each flow-through end of the tee is provided with an oil supply valve for enabling one hydraulic system to control the hydraulic cylinder in the other hydraulic system.

[0007] Preferably, the tee is used to connect the oil supply pipelines in the two hydraulic systems that control the hydraulic cylinders to move in the same direction.

[0008] Preferably, the hydraulic system includes an oil station. The oil supply pipeline from each oil station to the corresponding hydraulic cylinder passes through two oil supply valves, and the oil supply pipeline from the oil station to the hydraulic cylinder in the other hydraulic system passes through three oil supply valves.

[0009] Preferably, the tee is in a cross shape. One end of the cross shape is a blind end of the tee, and the other three ends are all flow-through ends of the tee.

[0010] The beneficial effects of the utility model are:

[0011] 1) Through the redundant optimization design of the system, the present utility model realizes the flexibility of equipment operation. Through simple operation and isolation, it can operate independently or control the hydraulic cylinder in another hydraulic system by the hydraulic system. On the premise of ensuring the safety of the system during operation, it does not cause disturbance to the normally operating hydraulic system and realizes the interconnection and interoperability of the hydraulic system without increasing the complexity of the system as much as possible, which is convenient for ensuring the effective operation of the hydraulic cylinder during the maintenance of some hydraulic system failures.

[0012] 2) In order to adapt to on-site installation and deal with high-pressure media, the present utility model designs a special structure for the tee, sets it as a cross shape, and one end is a blind tube end. Due to the buffering effect of the blind tube end gasket, no matter which direction the medium flows in, it will not cause erosion to the tee and reduce the wall thickness, effectively enhancing the working reliability of the high-pressure hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a sectional view of the tee;

[0014] Figure 2 is a schematic diagram of two hydraulic systems in the prior art respectively controlling different hydraulic cylinders;

[0015] Figure 3 is the redundant system structure for improving the reliability of the hydraulic valve proposed by the present utility model.

[0016] Description of the reference numerals: the first oil supply valve 1, the second oil supply valve 2, the third oil supply valve 3, the fourth oil supply valve 4, the fifth oil supply valve 5, the sixth oil supply valve 6, the seventh oil supply valve 7, the eighth oil supply valve 8, the ninth oil supply valve 9, the tenth oil supply valve 10, the first hydraulic cylinder 11, the second hydraulic cylinder 12, the tee 13, the tee blind tube end 131, the tee flow-through end 132, the first oil station 14, the second oil station 15. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following further describes the present utility model in conjunction with the embodiments. The description of the following embodiments is only for helping to understand the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

[0018] Embodiment 1

[0019] As an embodiment, as Figure 2 and Figure 3 shown, this redundant system structure for improving the reliability of the hydraulic valve is further optimized on the basis of the system structure in which two common hydraulic systems in the prior art independently control two hydraulic cylinders.

[0020] The system structures of two common hydraulic systems in the prior art that independently control two hydraulic cylinders are as follows Figure 2 As shown, the two hydraulic systems are each used to control the hydraulic cylinders of a butterfly valve, namely the first hydraulic cylinder 11 and the second hydraulic cylinder 12. Each hydraulic cylinder is respectively connected to two oil supply pipelines, and the two oil supply pipelines are respectively used to control the movement of the hydraulic cylinder in different directions; the oil supply pipelines are respectively connected to the first oil station 14 and the second oil station 15.

[0021] In the prior art, an oil supply valve is provided in each oil supply pipeline, that is Figure 2 the second oil supply valve 2, the third oil supply valve 3, the eighth oil supply valve 8 and the tenth oil supply valve 10 in

[0022] The redundant system structure for improving the reliability of hydraulic valves proposed in this embodiment is as follows Figure 3 As shown, the oil supply pipelines of the two hydraulic systems are connected through a tee 13, and an oil supply valve is provided at each tee flow end 132 of the tee 13. By controlling the opening and closing states of different oil supply valves, the oil from the first oil station 14 can not only flow to the first hydraulic cylinder 11, but also flow to the second hydraulic cylinder 12, and can also control the first hydraulic cylinder 11 and the second hydraulic cylinder 12 simultaneously. Conversely, the oil from the second oil station 15 in the other hydraulic system can also flow into the first hydraulic cylinder 11.

[0023] On the premise of ensuring system safety during operation, through the redundant optimization design of the system, the flexibility of equipment operation is realized without disturbing the normally operating hydraulic system, and the interconnection and interoperability of the hydraulic system are realized without increasing the complexity of the system as much as possible. In the state where interconnection and interoperability are not required, the two hydraulic systems can also be isolated from each other and operated independently by simply operating and controlling some oil supply valves.

[0024] Furthermore, in this embodiment, it is proposed that the tee 13 is in a cross shape, as follows Figure 1 As shown, one end of the cross shape is the tee blind end 131, and the other three ends are all tee flow ends 132. Among them Figure 1 the flow between the two vertically arranged tee flow ends 132 will not cause erosion and wear to the tee 13 pipe wall. When the fluid flow direction is from the horizontally arranged tee flow end 132 to the vertically arranged tee flow end 132, due to the existence of the tee blind end 131, the fluid will not directly impact the tee 13 pipe wall at the corner, so it is not easy to cause wear. This design improves the service life of the tee 13, and further improves the stability of the entire hydraulic valve system structure at the outlet of the circulating water pump.

[0025] Embodiment Two

[0026] As another embodiment, this second embodiment is proposed based on the first embodiment. A more specific redundant system structure for improving the reliability of hydraulic valves. The three-way valve 13 is arranged between the oil supply pipelines of two hydraulic systems for controlling the hydraulic cylinders to move in the same direction. As Figure 3 shown, in this embodiment, the three-way valve 13 is arranged at a position closer to the first hydraulic cylinder 11 in the two hydraulic systems. However, the structural systems of the pipelines on the upper and lower sides of the two hydraulic cylinders are basically symmetrical and have the same principle.

[0027] Specifically, Figure 3 on the left side of the three-way valve 13 located above in Figure 3 is connected to the third oil supply valve 3 originally connected to the first hydraulic cylinder 11. Above the three-way valve 13 is connected to the newly added fifth oil supply valve 5 for controlling the oil from the first oil station 14 to enter the three-way valve 13. The right side of the three-way valve 13 is connected to the right hydraulic system through an additional pipeline, and a seventh oil supply valve 7 is also set to control the connection between the two systems. In the right hydraulic system, the connection of the additional pipeline is between the original tenth oil supply valve 10 and the second hydraulic cylinder 12, and a ninth oil supply valve 9 is added in front of the second hydraulic cylinder 12.

[0028] When a failure occurs in the left hydraulic system but the first hydraulic cylinder 11 still needs to work. First, close the fifth oil supply valve 5 and the first oil supply valve 1 so that the oil from the first oil station 14 will no longer enter the system. Then, control the tenth oil supply valve 10, the seventh oil supply valve 7, and the first path of the third oil supply valve 3 and the sixth oil supply valve 6, the fourth oil supply valve 4, and the second path of the second oil supply valve 2 to be opened, so that the oil from the second oil station 15 can be input into the first hydraulic cylinder 11 to maintain its working state until the left hydraulic system is repaired. The first hydraulic cylinder 11 can be reconnected, and by closing the seventh oil supply valve 7 and the fourth oil supply valve 4, the left and right hydraulic systems can be restored to an independent state.

[0029] It should be noted that the same or similar parts in this embodiment and the first embodiment can be referred to each other and will not be elaborated in this application.

[0030] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

Claims

1. A redundant system structure for improving the reliability of a hydraulic valve. Two hydraulic systems are respectively used to control the hydraulic cylinders of a butterfly valve. Each hydraulic cylinder is respectively connected with two oil supply pipelines, and the two oil supply pipelines are respectively used to control the hydraulic cylinder to move in different directions. It is characterized in that: The oil supply pipelines between the two hydraulic systems are connected through a tee. An oil supply valve is provided at each tee flow-through end of the tee for enabling the hydraulic system to control the hydraulic cylinder in the other hydraulic system.

2. The redundant system structure for improving the reliability of a hydraulic valve according to claim 1, wherein The tee is used to connect the oil supply pipelines in the two hydraulic systems that control the hydraulic cylinders to move in the same direction.

3. The redundant system structure for improving the reliability of a hydraulic valve according to claim 1, characterized in that, The hydraulic system includes an oil station. The oil supply pipeline from each oil station to the corresponding hydraulic cylinder passes through two oil supply valves, and the oil supply pipeline from the oil station to the hydraulic cylinder of the other hydraulic system passes through three oil supply valves.

4. The redundant system structure for improving the reliability of a hydraulic valve according to claim 1, characterized in that, The tee is in a cross shape. One end of the cross shape is the tee blind pipe end, and the other three ends are all tee flow-through ends.

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