Reversing valve detection system for grease lubrication system
By designing a directional valve detection system for dry oil lubrication systems, the problems of complex fault location and inconvenient detection of directional valves were solved, achieving efficient detection of directional valves and improving system pressure stability, thus ensuring the normal operation of dry oil lubrication systems.
Patent Information
- Application Number
- CN202423145749.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-19
AI Technical Summary
In a dual-line centralized lubrication system, the fault location of the directional valve is complex and the testing of new spare parts is inconvenient, which makes maintenance work difficult, especially since the directional valve has a high failure rate and is difficult to adjust.
Design a directional valve detection system for a dry oil lubrication system, including components such as an oil inlet pipe, an oil outlet pipe, a platform dry oil pump, a differential pressure switch, a solenoid shut-off valve, and an oil pressure transmitter. The system detects the directional valve by automatically controlling the oil circuit and determines whether the valve core is operating normally.
It improves the detection efficiency of the reversing valve and the pressure stability of the system operation, ensures the normal operation of the dry oil pump motor, and reduces the workload of detection before the reversing valve is installed.
Smart Images
Figure CN223461255U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to shiplock dry oil lubrication technical field, especially a reversing valve detection system for dry oil lubrication system. BACKGROUND
[0002] Since the shiplock of Gezhouba Dam has been put into operation, the cargo throughput of the shiplock has been rising, which has made a direct contribution to the development of the Yangtze River shipping. Under the situation of 24-hour efficient operation of the shiplock, the running and wearing conditions of large mechanical equipment are aggravated.
[0003] The dry oil lubrication system provides good lubrication for the miter gate and its hoist, the counter gate and other large mechanical equipment of the shiplock, and is the basis for ensuring the efficient and stable operation of the shiplock. The dry oil lubrication system of the shiplock of Gezhouba Dam can be divided into a double-line centralized lubrication system, a multi-line centralized lubrication system and a single-line centralized lubrication system, among which the double-line centralized lubrication system is the most complex and contains a large number of components. The faults of the dry oil system of the shiplock of Gezhouba Dam are mostly from the double-line centralized lubrication system. This double-line centralized lubrication system mainly consists of a BS-B dry oil pump, a two-position four-way reversing valve, a differential pressure switch, a double-line distributor and two oil supply pipelines. When the BS-B pump is started, it will deliver high-pressure lubricating grease to the lubrication system. When the two-position four-way reversing valve receives a reversing electric signal, it will alternately inject oil into the two pipelines. The double-line distributor is connected in parallel with the two pipelines and pushes its working piston and control piston through the two alternately oil-supplying pipelines to deliver the lubricating grease to the branch pipelines and finally to each lubrication point. The differential pressure switch sends an electric signal through the pressure difference between the two pipelines, and when the pressure value reaches the set value, it will send a signal to control the reversing valve to reverse. The lubrication mode of the double-line centralized lubrication system is realized through the close cooperation of each component.
[0004] During the daily maintenance of the double-line centralized lubrication system, due to the large number of components involved, the newly replaced spare parts cannot be effectively detected, etc., resulting in complex and repeated fault positioning each time. Especially the fault problem of the reversing valve, due to the high failure rate and difficult adjustment, the newly purchased spare parts have no place to test, sometimes even the unqualified spare parts will cause the maintenance work to be unable to proceed smoothly. Therefore, it is very important to design and manufacture a set of maintenance system specially for the reversing valve of the double-line centralized lubrication system to solve the above problems. SUMMARY
[0005] The technical problem to be solved by the utility model is to provide a reversing valve detection system for a dry oil lubrication system, which solves the problem of inconvenient detection of the reversing valve before installation and use.
[0006] To solve the above technical problems, the utility model adopts the technical scheme that a kind of reversing valve detection system for dry oil lubrication system, including oil inlet pipe and oil outlet pipe, platform dry oil pump is equipped on oil outlet pipe;
[0007] Oil inlet pipe is connected with the one end of platform reversing valve and the oil inlet side of the reversing valve to be measured, and the other end of platform reversing valve and the oil inlet side of the reversing valve to be measured is connected with the one end of differential pressure switch;
[0008] Oil outlet pipe is connected with the one end of platform reversing valve and the oil outlet side of the reversing valve to be measured, and the other end of platform reversing valve and the oil outlet side of the reversing valve to be measured is connected with the other end of differential pressure switch;
[0009] First electromagnetic cut-off valve and second electromagnetic cut-off valve are respectively equipped between the oil outlet side and oil inlet side of platform reversing valve and differential pressure switch.
[0010] Preferably, the two ends of the differential pressure switch are connected with a buffer pipeline.
[0011] Preferably, the two ends of the differential pressure switch are respectively connected with a second oil pressure transmitter and a third oil pressure transmitter.
[0012] Preferably, a safety valve is provided between the oil inlet pipe and the oil outlet pipe.
[0013] Preferably, a first oil pressure transmitter is connected to the oil outlet pipe.
[0014] Preferably, the reversing valve to be measured is connected to the oil inlet pipe, the oil outlet pipe and the differential pressure switch through a connector.
[0015] Preferably, the end of the oil inlet pipe and the oil outlet pipe is connected to an oil cylinder.
[0016] The utility model provides a kind of reversing valve detection system for dry oil lubrication system, with the following beneficial effects:
[0017] 1, dry oil lubrication system exists oil passage blockage risk due to continuously to equipment point oiling, to cause system pressure to rise, reversing valve detection system can detect reversing valve to see whether it is normal to send message, improve system operating pressure stability.
[0018] 2, improve the stability of reversing valve direction control, to ensure that system dry oil pump motor normal operation.
[0019] 3, reversing valve can be detected before being connected into ship lock dry oil lubrication system, install in place after detection is normal, can reduce detection workload. BRIEF DESCRIPTION OF DRAWINGS
[0020] The utility model will be further described below in connection with the drawings and examples:
[0021] Figure 1The utility model discloses a structure schematic view. DETAILED DESCRIPTION
[0022] As Figure 1 The utility model discloses a reversing valve detection system for dry oil lubrication system, including oil inlet pipe 1 and oil outlet pipe 2, be equipped with platform dry oil pump 8 on oil outlet pipe 2,
[0023] Oil inlet pipe 1 is connected with the one end of platform reversing valve 3 and the oil inlet side of the reversing valve 4 to be measured, and the other end of the oil inlet side of platform reversing valve 3 and the reversing valve 4 to be measured is connected with one end of differential pressure switch 5.
[0024] Oil outlet pipe 2 is connected with the one end of platform reversing valve 3 and the oil outlet side of the reversing valve 4 to be measured, and the other end of the oil outlet side of platform reversing valve 3 and the reversing valve 4 to be measured is connected with the other end of differential pressure switch 5.
[0025] The oil outlet side and the oil inlet side of platform reversing valve 3 are respectively equipped with first electromagnetic stop valve 6 and second electromagnetic stop valve 7 between differential pressure switch 5. Electromagnetic stop valve can be automatically controlled to oil circuit through PLC, and when detecting reversing valve, electromagnetic stop valve is closed, so that oil circuit passes through the oil circuit of the reversing valve to be measured, and the reversing valve is detected.
[0026] Preferably, the two ends of the differential pressure switch 5 are connected with a buffer pipeline 9. The buffer oil circuit can reduce the flow rate of the oil, thereby controlling the oil circuit pressure.
[0027] Preferably, the two ends of the differential pressure switch 5 are respectively connected with a second oil pressure transmitter 10 and a third oil pressure transmitter 11. The oil circuit on both sides of the second oil pressure transmitter 10 and the third oil pressure transmitter 11 can be used alternately as an oil outlet oil circuit and an oil return oil circuit, and the two transmitters can measure the oil circuit pressure on the side, provide signals for overpressure overflow, and also provide signals for the differential pressure switch.
[0028] Preferably, a safety valve 12 is arranged between the oil inlet pipe 1 and the oil outlet pipe 2. The main function of the safety valve is to open the oil cylinder when the system pressure is overpressure, so as to ensure the safety of the system operation.
[0029] Preferably, a first oil pressure transmitter 13 is connected to the oil outlet pipe 2. The function of the first oil pressure transmitter 13 is to measure the system oil pressure.
[0030] Preferably, the reversing valve 4 to be measured is connected to the oil inlet pipe 1, the oil outlet pipe 2 and the differential pressure switch 5 through a connecting head 14. It is convenient to replace the reversing valve to be measured.
[0031] Preferably, the ends of the oil inlet pipe 1 and the oil outlet pipe 2 are connected to an oil cylinder 15. The oil is extracted from the oil cylinder and finally recycled to the oil cylinder.
[0032] The detection of the reversing valve is to detect whether the valve core of the reversing valve can normally act to switch the oil outlet of the valve after the pressure difference switch normally sends the reversing signal. The failure of the reversing valve has two performances. One is that the valve core does not reverse, the oil outlet end is overpressure with the pressure oil pipeline, and the other way has no pressure. The second is that the valve core does not move to the position, causing the two outlets to be blocked, the pressure of the oil outlet end has no obvious change, and the pressure of the pressure oil pipeline is overpressure.
[0033] The two failure modes above are that the pressure of the pressure oil pipeline of the reversing valve is high and continuously rises until the safety valve starts to release pressure when the set pressure of the safety valve is reached, and the return oil pipeline is close to zero pressure. That is, the second oil pressure transmitter 10 is zero pressure, and the third oil pressure transmitter 11 is continuously high pressure.
[0034] To judge whether the fault type is the first or the second, the pressure difference after the reversing valve also needs to be judged. The pressure difference of the two oil outlets of the reversing valve is measured and displayed by the differential pressure gauge and the sensor. When the pressure difference value continuously rises like the third oil pressure transmitter 11, it can be judged that the valve core of the reversing valve does not act. When the pressure difference maintains about 5 MPa of the reversing pressure and does not change, it can be judged that the valve core does not move to the position, and the two outlets are blocked.
[0035] The above embodiment is only a preferred technical solution of the present application, and should not be regarded as a limitation of the present application. The protection scope of the present application should be the technical solution recorded in the claims, including the equivalent replacement scheme of the technical features recorded in the claims. That is, the equivalent replacement improvement in this range is also within the protection scope of the present application.
Claims
1. A reversing valve detection system for a dry oil lubrication system, characterized by: It comprises an oil inlet pipe (1) and an oil outlet pipe (2), and a platform dry oil pump (8) is arranged on the oil outlet pipe (2); The oil inlet pipe (1) is connected with one end of a platform reversing valve (3) and an oil inlet side of a to-be-tested reversing valve (4), and the other end of the oil inlet side of the platform reversing valve (3) and the to-be-tested reversing valve (4) is connected with one end of a differential pressure switch (5); The oil outlet pipe (2) is connected with one end of an oil outlet side of the platform reversing valve (3) and the to-be-tested reversing valve (4), and the other end of the oil outlet side of the platform reversing valve (3) and the to-be-tested reversing valve (4) is connected with the other end of the differential pressure switch (5); The oil outlet side and the oil inlet side of the platform reversing valve (3) are respectively provided with a first electromagnetic cut-off valve (6) and a second electromagnetic cut-off valve (7) between the differential pressure switch (5).
2. A system for detecting a directional valve for a dry oil lubrication system according to claim 1, characterized in that: Both ends of the differential pressure switch (5) are connected with a buffer pipeline (9).
3. A system for detecting a directional valve for a dry oil lubrication system according to claim 1 or 2, characterized in that: Both ends of the differential pressure switch (5) are respectively connected with a second oil pressure transmitter (10) and a third oil pressure transmitter (11).
4. The system for detecting a directional valve for a dry oil lubrication system according to claim 1, characterized in that: A safety valve (12) is arranged between the oil inlet pipe (1) and the oil outlet pipe (2).
5. The system for detecting a directional valve for a dry oil lubrication system according to claim 1, characterized in that: The oil outlet pipe (2) is connected with a first oil pressure transmitter (13).
6. The system for detecting a directional valve for a dry oil lubrication system according to claim 1, characterized in that: The to-be-tested reversing valve (4) is connected with the oil inlet pipe (1), the oil outlet pipe (2) and the differential pressure switch (5) through a connecting head (14).
7. The system for detecting a directional valve for a dry oil lubrication system according to claim 1, characterized by: Ends of the oil inlet pipe (1) and the oil outlet pipe (2) are connected to an oil cylinder (15).