Recyclable oil sample storage device without waste oil discharge on site

Abstract

A recyclable oil sample storage device without waste oil discharge on site comprises a main oil tank and an auxiliary oil tank, and the upper end of the main oil tank is communicated with the auxiliary oil tank through a communicating pipe; an oil inlet of the main oil tank is communicated with a prepared working oil sample through an oil inlet pipeline I, and a pump I and an electromagnetic valve I are arranged on the oil inlet pipeline I; a sampling port of the main oil tank is communicated with an oil inlet of the detection equipment through a sampling pipe I, and a pump II and an electromagnetic valve II are arranged on the sampling pipe I; an oil inlet of the auxiliary oil tank is provided with an oil inlet pipeline II; the oil inlet pipeline II is provided with a pump III and an electromagnetic valve III; a sampling port of the auxiliary oil tank is communicated with an oil inlet of the detection equipment through a sampling pipe II, a pump IV and an electromagnetic valve IV are arranged on the sampling pipe II, and an oil outlet of the detection equipment is respectively communicated with an oil inlet pipeline I and an oil inlet pipeline II; the upper end of the main oil tank and the upper end of the auxiliary oil tank are each provided with an exhaust pipe, and the two exhaust pipes are each provided with a pump and an electromagnetic valve. By adopting the device disclosed by the invention, zero emission of waste oil on site and repeated cyclic utilization of working oil samples can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of on-site calibration of an online monitoring device for dissolved gas in transformer oil, in particular to an oil sample storage device which can be recycled without discharging waste oil on site. Background Art

[0002] Insulating oil for insulation and heat dissipation is filled in power transformers, converter transformers, high-voltage reactors and other equipment. During the long-term operation of these power transmission and transformation equipment, the internal solid insulation and insulating oil will deteriorate and age due to the internal electric field, temperature and faults, resulting in the degradation of solid and liquid insulating media and the generation of various fault characteristic gases dissolved in the insulating oil. Therefore, the components and contents of various fault gases can be obtained through the analysis of dissolved gases in oil to judge the operating status of oil-immersed high-voltage electrical equipment. The online monitoring device for dissolved gas in oil is an online monitoring device installed near oil-immersed power equipment that can detect dissolved gas in oil in real time. In order to ensure the long-term stability and detection accuracy of the online monitoring device for dissolved gas in oil, a working oil sample with a certain known gas concentration needs to be configured according to relevant technical requirements to assess the detection performance of the online monitoring device for dissolved gas in oil. At present, the oil storage devices used to store working oil samples can be mainly divided into two categories. One category is ordinary aluminum foil oil bags, which have the advantages of being cheap and light. However, it is a consumable item. It is not easy to clean and is usually disposable. In addition, due to its soft material and lack of protection, it is easy to break when encountering hard objects during transportation or actual use, resulting in oil sample contamination. The other type is a special oil sample storage device, which usually has a hard protective shell material, usually iron or stainless steel. The oil sample is stored in a tank of a certain volume. The tank is usually based on the piston principle, so there are problems with sealing and life, and the longer piston connecting rod usually occupies a certain upper space (that is, the piston connecting rod will rise or fall when the oil sample is full, and the state of the piston connecting rod is the opposite when the oil sample is not filled). Currently, this type of special oil sample storage device commonly used can only meet the basic functions of oil sample storage, manual sampling, and cleaning. The disadvantage is that it is bulky and heavy, especially after the specified volume of oil sample is loaded.

[0003] In addition, since the currently commonly used working oil sample storage device is only a storage device for oil samples, the device must also be equipped with a waste oil storage device during on-site testing to collect the waste oil discharged by the online monitoring device for dissolved gas in oil after testing the working oil sample. Therefore, the site needs to carry the same number of waste oil collection devices as the oil sample storage devices, which increases the tools and equipment prepared for on-site testing. At the same time, if the waste oil discharged on site is large, the volume of the waste oil collection device prepared in advance is not large enough, which will also lead to the need to find a centralized waste oil discharge site at the test site or prepare a larger waste oil collection device in advance to empty the existing waste oil. This will lead to problems in the collection and storage of waste oil on site. Secondly, according to the requirements of relevant test standards, one online monitoring device for dissolved gas in oil needs to be calibrated with 3-5 oil samples with different gas concentrations, which means that (3-5)*N (number of on-site calibration devices) oil sample storage devices need to be carried on site. For the on-site calibration of a converter station with 17-30 units, the number of such oil sample storage devices is very large. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art, thereby providing a working oil sample storage device that does not discharge waste oil on site and can be recycled. After adopting the device of the present invention, zero discharge of waste oil on site and repeated recycling of working oil samples can be achieved.

[0005] An oil sample storage device that can be recycled without discharging waste oil on site, comprising a main oil tank and an auxiliary oil tank, wherein the upper end of the main oil tank is connected to the auxiliary oil tank through a connecting pipe; The oil inlet of the main oil tank is connected with the configured working oil sample through the oil inlet pipeline 1, and a pump 1 and a solenoid valve 1 are arranged on the oil inlet pipeline; the sampling port of the main oil tank is connected with the oil inlet of the detection equipment through the sampling pipe 1, and a pump 2 and a solenoid valve 2 are arranged on the sampling pipe 1; The auxiliary oil tank oil inlet is provided with an oil inlet pipeline 2, and the oil inlet pipeline 2 is provided with a pump 3 and a solenoid valve 3; the auxiliary oil tank sampling port is connected with the oil inlet of the detection equipment through a sampling pipe 2, and the sampling pipe 2 is provided with a pump 4 and a solenoid valve 4, and the oil outlet of the detection equipment is connected with the oil inlet pipeline 1 and the oil inlet pipeline 2 respectively; The upper ends of the main oil tank and the auxiliary oil tank are both provided with exhaust pipes, and the two exhaust pipes are both provided with pumps and solenoid valves.

[0006] The main oil tank and the auxiliary oil tank are both made of soft oil bladders.

[0007] A liquid level gauge is provided in each of the main oil tank and the auxiliary oil tank.

[0008] The bottom of the main oil tank and the auxiliary oil tank are both provided with oil drain ports.

[0009] Sampling tube 1 and sampling tube 2 respectively lead out a bypass sampling tube for manual oil extraction.

[0010] The volume of the auxiliary oil tank is 3%-5% larger than that of the main oil tank.

[0011] It also includes a controller which can collect liquid level meter signals and control the working states of the solenoid valves and pumps on each oil pipe.

[0012] The utility model also comprises a power supply device which can supply power to the controller, the liquid level meter, the electromagnetic valves on each oil pipe and the pump.

[0013] A soft oil bag is used to replace the metal piston oil storage tank, and the space occupied by the piston rod of the original oil storage device is replaced by another soft oil bag (the soft oil bag has almost no space when it is not filled with waste oil, and is called a secondary oil bag. The secondary oil bag only occupies space when the main oil bag is discharged into it through the detected device). Without changing the oil storage volume of the original oil storage tank, a new space for storing waste oil is added to solve the problem of on-site waste oil discharge and collection. Compared with the existing waste oil barrels, the full sealing and drip-free environmental protection of the entire waste oil collection is achieved.

[0014] In the present invention, since the concentration of the oil sample discharged by the calibrated device after the standard oil sample is tested will have a certain random change, and the test standard requirements (there is a concentration difference between 3-5 concentrations) are reasonably utilized, it is considered that the so-called "waste oil" discharged by the tested device can be reused as the working oil sample for the next concentration test. Since the main and auxiliary oil sacs of the present invention can ensure that the "waste oil" tested last time is pollution-free, the artificial sampling port designed in this device also ensures the on-site testing and sampling of "waste oil" as a working oil sample. It can not only reduce the number of working oil sample storage devices carried, but also is a solution for on-site re-dispensing of oil. Therefore, the design of an oil storage device can solve the two functions of on-site waste oil collection and working oil sample reuse at the same time.

[0015] Compared with the prior art, the design of the present invention mainly solves the problems of zero discharge of waste oil on site and repeated recycling of working oil samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention. DETAILED DESCRIPTION

[0017] like Figure 1As shown, the present invention provides an oil sample storage device that can be recycled without discharging waste oil on site, including a main oil tank 3 and an auxiliary oil tank 7 both made of soft oil bags. When the main oil tank 3 is used as a working oil sample storage device, the upper end of the main oil tank 3 is connected with the auxiliary oil tank 7 through a connecting pipe 6, and the oil inlet of the main oil tank 3 is connected with the storage tank storing the configured working oil sample through an oil inlet pipeline 1, and a pump 2 and a solenoid valve 5 are provided on the oil inlet pipeline 1; the sampling port of the main oil tank 3 is connected with the oil inlet of the detection equipment through a sampling pipe 14, and a pump 2 12 and a solenoid valve 2 11 are provided on the sampling pipe 14, and a bypass sampling pipe 13 for manual oil extraction is led out from the sampling pipe 14; a liquid level gauge 4 is arranged in the main oil tank 3, and an oil discharge port 25 is arranged at the bottom; an oil inlet pipeline 2 15 is arranged at the oil inlet of the auxiliary oil tank 7, and a pump 3 17 and a solenoid valve 3 16 are provided on the oil inlet pipeline 2 15, and the oil outlet of the detection equipment is connected with the oil inlet pipeline 2 15 of the auxiliary oil tank 7. When the auxiliary oil tank 7 is used as a storage device for working oil samples, the oil outlet of the auxiliary oil tank 7 is connected to the oil inlet of the detection equipment through the sampling tube 24, and the sampling tube 24 is provided with a pump 4 21 and a solenoid valve 4 22. The sampling tube 24 leads to a bypass sampling tube 23 for manual oil extraction, and the oil outlet of the detection equipment is connected to the oil inlet pipeline 1; there is a liquid level gauge 27 in the auxiliary oil tank 7, and an oil discharge port 26 at the bottom. The upper ends of the oil tank 3 and the auxiliary oil tank 7 are both provided with exhaust pipes, and the two exhaust pipes are both provided with a pump 5 and a solenoid valve 5. It also includes a controller that can collect liquid level gauge signals, control the working status of the solenoid valves and pumps on each oil pipe, and a power supply device that can power the controller, the liquid level gauge, and the solenoid valves and pumps on each oil pipe. The controller can use a plc, and collecting liquid level gauge signals through the plc and controlling the solenoid valves and pumps are existing technologies, which will not be repeated in this embodiment. The power supply device can be a DC battery.

[0018] The present invention ingeniously realizes no waste oil discharge during the on-site or laboratory calibration of the substation by designing and functioning the main and auxiliary oil bags in the oil storage device; and can also realize the maximum recycling of the working oil sample by utilizing the function conversion of the auxiliary and main oil bags in the oil storage device. It not only avoids the increase of waste oil barrels and waste oil discharge caused by waste oil discharge during the on-site calibration of the on-site and laboratory oil dissolved gas online monitoring device to the greatest extent, but also increases the use efficiency of the working oil sample, greatly reducing the labor intensity and oil consumption of on-site oil distribution.

[0019] Workflow: Filling the main oil tank: inject the configured working oil sample (oil sample with known gas concentration) from the oil inlet line 1 into the main oil tank 3 through the oil inlet line 1 and pump 2. Observe the injected oil level through the oil level gauge 4, and transmit the oil level signal to the controller, and control the opening and closing of the solenoid valve 5 through the controller to control the oil level of the main oil tank 3. If the solenoid valve 5 fails or the auxiliary oil tank is cleaned, the excess oil will overflow into the auxiliary oil tank 7 through the connecting pipe 6. The volume of the auxiliary oil tank can be slightly larger than the volume of the main oil tank, about 3%-5%.

[0020] Venting the main oil tank: If the oil injected into the main oil tank is not full, the upper space of the main oil tank will discharge the upper excess gas through the exhaust pipe 10, the solenoid valve 58 and the pump 59 to avoid changes in the gas concentration in the oil.

[0021] Oil sampling and calibration of the main oil tank: After the oil filling is completed, the pump 2 12 and the solenoid valve 2 11 on the sampling tube 14 manually take out the oil sample of the main oil tank for calibration through the bypass sampling tube 13 connected to the sampling tube 14.

[0022] On-site verification (main oil tank): connect the oil inlet of the test product, such as the online monitoring device for dissolved gas in oil, to the sampling pipe 14 of the main oil tank 3, open the pump 2 12 and the solenoid valve 11 to supply the oil of the main oil tank to the test product. Connect the oil outlet of the test product to the oil inlet pipe 2 15 of the auxiliary oil tank 7, open the solenoid valve 3 16 and the pump 3 17, and discharge the waste oil after the main oil tank is tested from the outlet of the test product into the auxiliary oil tank 7, so as to achieve on-site testing without waste oil discharge.

[0023] Recycling of working oil sample: If the oil in the auxiliary oil tank 7 needs to be recycled as a working oil sample, the oil level gauge 27 of the auxiliary oil tank 7 can be used to observe the auxiliary oil tank oil level, open another solenoid valve 6 18 and pump 6 19, and discharge the upper gas of the auxiliary oil tank 7 through the exhaust pipe 6 20. After the oil is discharged from the exhaust port, close the solenoid valve 6 18 and pump 6 19. After the balance of the auxiliary oil tank oil sample is stable, open the solenoid valve 4 22 and pump 4 21 on the sampling pipe 24, and manually take out the auxiliary oil tank oil sample for calibration through the bypass sampling pipe 23 connected to the sampling pipe 24.

[0024] On-site calibration (auxiliary oil tank): connect the sample to be tested, such as the oil inlet sampling tube 24 of the online monitoring device for dissolved gas in oil, open the solenoid valve 422 and pump 421 to supply the oil in the auxiliary oil tank to the sample to be tested. Connect the oil outlet of the sample to the oil inlet pipeline 1 of the main oil tank, open the solenoid valve 15 and pump 12, and drain the waste oil from the auxiliary oil tank 7 after testing to the main oil tank, so as to achieve on-site testing without waste oil discharge.

[0025] Oil draining: When the working oil sample in the oil storage device has been recycled, it is discharged through the bottom oil drain ports 25 and 26 of the main and auxiliary oil tanks respectively.

[0026] Oil tank cleaning: Open solenoid valve 15 and solenoid valve 6 18, pump 12 and pump 6 19 to pass the main oil tank inlet pipeline 1 and inject clean blank oil into the main oil tank and auxiliary oil tank for cleaning.

[0027] Device charging: Use a 220V charging socket to power the device or charge the DC battery to solve the problem of no power supply at the calibration site.

Claims

1. An oil sample storage device that can be recycled without discharging waste oil on site, characterized in that: It comprises a main oil tank (3) and an auxiliary oil tank (7), wherein the upper end of the main oil tank (3) is connected to the auxiliary oil tank (7) via a connecting pipe (6); The oil inlet of the main oil tank (3) is connected to the configured working oil sample through an oil inlet pipeline (1), and a pump (2) and a solenoid valve (5) are provided on the oil inlet pipeline (1); the sampling port of the main oil tank (3) is connected to the oil inlet of the detection equipment through a sampling pipe (14), and a pump (12) and a solenoid valve (11) are provided on the sampling pipe (14); The auxiliary oil tank (7) is provided with an oil inlet pipeline No. 2 (15), and the oil inlet pipeline No. 2 (15) is provided with a pump No. 3 (17) and a solenoid valve No. 3 (16); the sampling port of the auxiliary oil tank (7) is connected to the oil inlet of the detection device through a sampling pipe No. 2 (24), and the sampling pipe No. 2 (24) is provided with a pump No. 4 (21) and a solenoid valve No. 4 (22); the oil outlet of the detection device is respectively connected to the oil inlet pipeline No. 1 (1) and the oil inlet pipeline No. 2 (15); The upper ends of the main oil tank (3) and the auxiliary oil tank (7) are both provided with exhaust pipes, and the two exhaust pipes are both provided with pumps and solenoid valves.

2. The oil sample storage device according to claim 1, which can be recycled without discharging waste oil on site, is characterized in that: The main oil tank (3) and the auxiliary oil tank (7) are both made of soft oil bladders.

3. The oil sample storage device according to claim 1, which can be recycled without discharging waste oil on site, is characterized in that: A liquid level gauge is provided in each of the main oil tank (3) and the auxiliary oil tank (7).

4. The oil sample storage device according to claim 1, which can be recycled without discharging waste oil on site, is characterized in that: The main oil tank (3) and the auxiliary oil tank (7) are both provided with oil drain ports at the bottom.

5. The oil sample storage device according to claim 1, which can be recycled without discharging waste oil on site, is characterized in that: Sampling pipe 1 (14) and sampling pipe 2 (24) respectively lead out a bypass sampling pipe for manual oil extraction.

6. The oil sample storage device according to claim 1, which can be recycled without discharging waste oil on site, is characterized in that: The volume of the auxiliary oil tank (7) is 3%-5% larger than that of the main oil tank (3).

7. An oil sample storage device for recycling on-site waste oil without discharge according to any one of claims 1 to 6, characterized in that: It also includes a controller which can collect liquid level meter signals and control the working states of the solenoid valves and pumps on each oil pipe.

8. The oil sample storage device according to claim 7, which can be recycled without discharging waste oil on site, is characterized in that: The utility model also comprises a power supply device which can supply power to the controller, the liquid level meter, the electromagnetic valves on each oil pipe and the pump.

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