Active oil-water mixture detection device

Abstract

An active oil-water mixture detection device comprises a detection tank, the two ends of the detection tank are communicated with the bottom of an oil groove through an oil inlet pipe and an oil return pipe respectively, an oil-water mixture sensor is installed on the detection tank, one-way valves are installed on the oil inlet pipe and the oil return pipe respectively, and a circulating oil pump is installed on the oil return pipe. The device is used for solving the problems that when oil in a static state is measured, the water content in an oil tank is only local, the accuracy of a measurement result is insufficient, the actual water content in the oil tank cannot be reflected truly, and maloperation and refusal of operation of an oil-water mixing sensor are easily caused.

Description

Technical Field

[0001] The utility model relates to an active oil-water mixing detection device. Background Art

[0002] Lubricating oil is widely used in hydro-turbine generator equipment. However, water mixed in the lubricating oil is extremely harmful to the equipment and is difficult to detect. In severe cases, it will deteriorate the insulation of the lubricating oil, thereby generating shaft current and causing tile burning accidents, affecting the safe and stable operation of the unit. Therefore, the quality of the oil in the oil tank is a key factor in ensuring the safety of the unit.

[0003] The oil-water sensor installed in the oil tank can detect the water content in the oil tank. The main working principle of the capacitive sensor installed on site is that when other conditions remain unchanged, the capacitance value changes linearly with the change of the dielectric constant when the dielectric constant between the two poles changes. When water is mixed into the oil between the two poles of the oil-water sensor, its dielectric constant changes, thereby causing the capacitance value to change. The oil-water ratio is set through the internal microcircuit of the oil-water sensor. When the ratio of oil-water mixing reaches the set value, the controller outputs an alarm node signal, and the oil-water sensor operates to output. At present, the capacitive oil-water sensor installed in the bearing oil tank is mostly fixed at the bottom of the oil tank or in the pipeline leading out from the bottom of the oil tank.

[0004] The oil-water mixing sensors currently used are mostly fixedly installed at the bottom of the oil tank or in the outlet pipe at the bottom of the oil tank. When the unit stops running, the oil in the oil tank is in a static state. At this time, the water content in the oil tank measured is only a local situation. The measurement result is not accurate enough and cannot truly reflect the actual water content in the oil tank, which can easily cause the oil-water mixing sensor to malfunction or refuse to operate. Utility Model Content

[0005] The purpose of the utility model is to provide an active oil-water mixing detection device, which is used to solve the problem that when measuring static oil, the water content in the oil tank is only local, the measurement result is not accurate enough, and cannot truly reflect the actual water content in the oil tank, which easily leads to the problem of misoperation and refusal of the oil-water mixing sensor.

[0006] In order to solve the above problems, the technical solution of the utility model is:

[0007] An active oil-water mixing detection device comprises a detection tank, both ends of which are connected to the bottom of an oil tank through an oil inlet pipe and an oil return pipe respectively, an oil-water mixing sensor is installed on the detection tank, a check valve is installed on the oil inlet pipe and the oil return pipe, and a circulating oil pump is installed on the oil return pipe.

[0008] A first stop valve is installed on both the oil inlet pipe and the oil return pipe, a discharge pipe is installed on the detection tank, and a second stop valve is installed on the discharge pipe.

[0009] The detection tank comprises a transparent tube, both ends of which are assembled in a cover shell, the two cover shells are connected by a plurality of screws, and a sealing ring is arranged between the transparent tube and the cover shell.

[0010] The transparent tube is a plexiglass tube.

[0011] The pipe opening at one end of the oil return pipe located in the detection tank is higher than the pipe opening at one end of the oil inlet pipe located in the detection tank.

[0012] The beneficial effects of the utility model are as follows: the oil in the oil tank is made to circulate in a fixed direction by a circulating oil pump, and the water content in the oil tank is dynamically detected, which can truly reflect the actual water content in the oil tank, thereby improving the phenomenon of sensor refusal and malfunction in the prior art and improving the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings:

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a partial structural schematic diagram of the utility model.

[0016] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle.

[0017] In the figure: oil tank 1, first stop valve 2, one-way valve 3, oil inlet pipe 4, second stop valve 5, discharge pipe 6, detection tank 7, oil-water mixing sensor 8, circulating oil pump 9, oil return pipe 10, transparent tube 71, screw 72, sealing ring 73, cover 74. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figures 1 to 3 As shown, an active oil-water mixing detection device includes a detection tank 7, both ends of which are connected to the bottom of the oil tank 1 through an oil inlet pipe 4 and an oil return pipe 10 respectively, an oil-water mixing sensor 8 is installed on the detection tank 7, a one-way valve 3 is installed on the oil inlet pipe 4 and the oil return pipe 10, and a circulating oil pump 9 is installed on the oil return pipe 10.

[0020] The use process of the utility model is as follows: the oil mixing sensor detects the oil in the oil tank 1 every 30 minutes. Before the oil mixing sensor detects, the circulating oil pump 9 is started for 1 minute to allow the oil in the oil tank 1 to circulate in a fixed direction, thereby dynamically monitoring the water content of the oil in the oil tank 1, thereby improving the accuracy of the detection.

[0021] The first stop valve 2 is installed on the oil inlet pipe 4 and the oil return pipe 10, the discharge pipe 6 is installed on the detection tank 7, and the second stop valve 5 is installed on the discharge pipe 6. When the oil-water sensor 8 is damaged and needs to be replaced, the first stop valve 2 can be closed and the second stop valve 5 can be opened to allow the oil in the detection tank 7 to be discharged into the oil barrel along the discharge pipe 6. In this way, when replacing the oil-water sensor 8, the oil will not be spread everywhere, and the site can be kept clean.

[0022] The detection tank 7 includes a transparent tube 71 , both ends of which are assembled in a cover shell 74 , the two cover shells 74 are connected by a plurality of screws 72 , and a sealing ring 73 is provided between the transparent tube 71 and the cover shell 74 .

[0023] The transparent tube 71 is a plexiglass tube. The function of the transparent tube 71 is that the staff can directly observe the grease condition in the oil tank 1 through the transparent tube 71, for example, whether the grease is emulsified, discolored, or has sediment, and at the same time verify whether the oil-water mixing sensor 8 is damaged. For example, when it is observed that the grease has been emulsified, the oil-water mixing sensor 8 does not alarm, it means that the oil-water mixing sensor 8 is damaged.

[0024] The end of the oil return pipe 10 located in the detection tank 7 is higher than the end of the oil inlet pipe 4 located in the detection tank 7. This can extend the circulation path of the grease, prevent the grease discharged from the oil return pipe 10 from being immediately sucked into the oil inlet pipe 4, and improve the accuracy and reliability of grease detection.

[0025] The contents described in the embodiments of this specification are merely an enumeration of the implementation forms of the utility model concept. The protection scope of the utility model should not be deemed to be limited to the specific forms described in the embodiments. The protection scope of the utility model also extends to equivalent technical means that can be thought of by those skilled in the art based on the concept of the utility model.

Claims

1. An active oil-water mixing detection device, characterized in that: The invention comprises a detection tank (7), the two ends of which are connected to the bottom of an oil tank (1) through an oil inlet pipe (4) and an oil return pipe (10), respectively; an oil-water mixing sensor (8) is installed on the detection tank (7), a check valve (3) is installed on both the oil inlet pipe (4) and the oil return pipe (10), and a circulating oil pump (9) is installed on the oil return pipe (10).

2. The active oil-water mixing detection device according to claim 1, characterized in that: A first stop valve (2) is installed on both the oil inlet pipe (4) and the oil return pipe (10), a discharge pipe (6) is installed on the detection tank (7), and a second stop valve (5) is installed on the discharge pipe (6).

3. An active oil-water mixing detection device according to claim 1 or 2, characterized in that: The detection tank (7) comprises a transparent tube (71), both ends of the transparent tube (71) are assembled in a cover shell (74), the two cover shells (74) are connected by a plurality of screws (72), and a sealing ring (73) is provided between the transparent tube (71) and the cover shell (74).

4. The active oil-water mixing detection device according to claim 3, characterized in that: The transparent tube (71) is a plexiglass tube.

5. An active oil-water mixing detection device according to claim 1 or 2, characterized in that: The pipe opening at one end of the oil return pipe (10) located in the detection tank (7) is higher than the pipe opening at one end of the oil inlet pipe (4) located in the detection tank (7).

Images