Oil product sampling structure

Abstract

The utility model provides an oil product sampling structure, and belongs to the technical field of electrical equipment maintenance, and the oil product sampling structure comprises a sampling pipe, a piston rod, a liquid inlet pipe, a check valve, a settling chamber, an exhaust pipe and a sampling pipe; the liquid inlet pipe is communicated with one end of the sampling pipe, the other end of the sampling pipe is a piston port, and the piston rod penetrates through the piston port and is slidably connected in the sampling pipe; the check valve is arranged on the liquid inlet pipe; a first opening and a second opening are formed in the side wall of the settling chamber, a third opening is formed in the top wall of the settling chamber, the end, away from the sampling pipe, of the liquid inlet pipe is communicated with the first opening, the sampling pipe is communicated with the second opening, the exhaust pipe is communicated with the third opening, and an exhaust valve is arranged on the exhaust pipe. And bubbles in the settling chamber can be discharged from the exhaust pipe, so that an oil sample in the settling chamber enters the sampling pipe from the settling chamber through the liquid inlet pipe, and the oil sample flowing into the sampling pipe does not have bubbles at the moment, so that the accuracy of an oil sample detection result is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of power equipment maintenance, and in particular to an oil sampling structure. Background Art

[0002] At present, a large number of transformers are used in power plants, power substations, and large industrial and mining enterprises. Moreover, most of the transformers currently used, whether large main transformers or small transformers, are still oil-immersed. Oil-immersed transformers are filled with special transformer oil inside the transformer, and the transformer oil plays the role of insulation, cooling, and corrosion prevention in the oil tank. It can be seen that the quality of transformer oil plays a vital role in a transformer, so the daily detection of transformer oil quality indicators is very important. The acid value indicator can directly reflect the aging degree of transformer oil.

[0003] Since insulating oil plays an insulating role in the equipment, its acid value must be controlled within a certain range. If the acid value is too high, the corrosiveness of the insulating oil will increase, thereby accelerating the aging of the equipment and reducing the service life of the equipment. At the same time, the acid value of the insulating oil can also reflect the aging degree of the oil and the possible content of acidic substances; the oil must be sampled before testing, and its sealing must be ensured during the sampling process to ensure the accuracy of subsequent testing.

[0004] In the current oil sampling equipment, bubbles often enter the sampling tube during the sampling process. The bubbles carry air, and the bubbles in the sampling tube are likely to affect the oil sample detection results. At this time, the staff needs to knock on the tube wall to collect the bubbles and discharge them from the top of the sampling tube, which is cumbersome. Utility Model Content

[0005] The present application provides an oil sampling structure to solve the technical problem that bubbles easily enter into a sampling tube during sampling in existing oil sampling equipment.

[0006] The embodiment of the present application provides an oil sampling structure, including a sampling tube, a piston rod, a liquid inlet tube, a stop valve, a sedimentation chamber, an exhaust pipe and a sampling tube;

[0007] The liquid inlet pipe is connected to one end of the sampling tube, the other end of the sampling tube is a piston port, and the piston rod passes through the piston port and is slidably connected in the sampling tube;

[0008] The stop valve is arranged on the liquid inlet pipe, and the stop valve is used to open or close the liquid inlet pipe;

[0009] A first opening and a second opening are provided on the side wall of the sedimentation chamber, and a third opening is provided on the top wall of the sedimentation chamber. One end of the liquid inlet pipe away from the sampling tube is connected to the first opening, one end of the sampling tube is connected to the second opening, and the other end of the sampling tube is used to be connected to the sampling interface of the transformer. The exhaust pipe is connected to the third opening, and an exhaust valve is provided on the exhaust pipe, and the exhaust valve is used to open or close the exhaust pipe.

[0010] In the preferred technical solution of the above oil sampling structure, it also includes a drain pipe, a drain port is provided on the side wall of the sampling pipe, one end of the drain pipe is connected to the drain port, and a sealing cover is provided at the other end of the drain pipe.

[0011] In the preferred technical solution of the above-mentioned oil sampling structure, it also includes a sleeve, one end of which is connected to the first opening, and the inner wall of the other end of the sleeve is provided with multiple sealing rings at intervals, and the end of the liquid inlet pipe away from the sampling pipe passes through each of the sealing rings in turn and is detachably connected to the sleeve.

[0012] In the preferred technical solution of the above-mentioned oil sampling structure, it also includes a quick connector, which is connected to the end of the sampling tube away from the second opening, and the quick connector matches the sampling interface of the transformer, and the quick connector is used to communicate with the sampling interface.

[0013] In a preferred technical solution of the above oil sampling structure, the first opening is located below the second opening.

[0014] In the preferred technical solution of the above oil sampling structure, one end of the sampling tube away from the piston port is a liquid inlet, the liquid inlet tube is connected to the liquid inlet, and the liquid inlet is located above the liquid discharge port.

[0015] In the preferred technical solution of the above oil sampling structure, the liquid discharge port is located between the liquid inlet and the piston port.

[0016] In the preferred technical solution of the above-mentioned oil sampling structure, the sealing cover is a sleeve, one end of the sleeve is an open end, the other end of the sleeve is a closed end, the inner cavity wall of the sleeve is provided with an internal thread, and the outer wall of the end of the drain pipe away from the drain port is provided with an external thread matching the internal thread.

[0017] In the preferred technical solution of the above oil sampling structure, a first sealing ring is provided on the bottom wall of the inner cavity of the sleeve.

[0018] In the preferred technical solution of the above oil sampling structure, the inner diameter of the liquid inlet is larger than the inner diameter of the liquid outlet.

[0019] The present application provides an oil sampling structure, comprising a sampling tube, a piston rod, a liquid inlet tube, a stop valve, a sedimentation chamber, an exhaust pipe and a sampling tube; the liquid inlet tube is connected to one end of the sampling tube, the other end of the sampling tube is a piston port, and the piston rod passes through the piston port and is slidably connected in the sampling tube; the stop valve is arranged on the liquid inlet tube; a first opening and a second opening are arranged on the side wall of the sedimentation chamber, a third opening is arranged on the top wall of the sedimentation chamber, an end of the liquid inlet tube away from the sampling tube is connected to the first opening, the sampling tube is connected to the second opening, the exhaust pipe is connected to the third opening, and an exhaust valve is arranged on the exhaust pipe. When using the oil sampling structure of the present application for sampling, first close the stop valve, connect the sampling tube to the sampling interface of the transformer, and open the exhaust valve. At this time, the oil sample fills the entire sedimentation chamber, and the bubbles in the sedimentation chamber will be discharged from the exhaust pipe. When there are no bubbles discharged from the exhaust pipe, close the exhaust valve, open the stop valve, and pull the piston rod. At this time, the oil sample in the sedimentation chamber will enter the sampling tube from the sedimentation chamber through the liquid inlet pipe. At this time, there will be no bubbles in the oil sample flowing into the sampling tube, which solves the technical problem that bubbles are easy to enter the sampling tube when sampling in the existing oil sampling equipment, ensures that there are no bubbles in the sampling tube, and ensures the accuracy of the oil sample detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] Figure 1 A schematic diagram of the structure of the oil sampling structure provided in the embodiment of the present application;

[0022] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 3 for Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0024] Figure 4 A schematic structural diagram of a quick connector in an oil sampling structure provided in an embodiment of the present application.

[0025] Description of reference numerals:

[0026] 100-sampling tube; 110-piston port; 120-liquid inlet; 130-liquid discharge port;

[0027] 200-piston rod;

[0028] 300-liquid inlet pipe;

[0029] 400-stop valve;

[0030] 500 - precipitation chamber; 510 - first opening; 520 - second opening; 530 - third opening;

[0031] 600-exhaust pipe;

[0032] 700-sampling tube;

[0033] 800-Exhaust valve;

[0034] 900-drain pipe;

[0035] 1000-sealing cover;

[0036] 1100- casing;

[0037] 1200-sealing ring;

[0038] 1300-Quick connector;

[0039] 1400-first sealing ring;

[0040] 1500-second sealing ring;

[0041] 1600-Third sealing ring.

[0042] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0043] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0044] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0047] As mentioned in the background technology, during the sampling process of transformer oil of the transformer, the oil sampling equipment in the prior art often has bubbles entering the sampling tube during the sampling process. The bubbles carry air, and the bubbles in the sampling tube are likely to affect the oil sample detection results. At this time, the staff needs to knock on the tube wall to gather the bubbles and discharge them from the top of the sampling tube, which is cumbersome to operate.

[0048] In order to solve the technical problem that bubbles easily enter the sampling tube during sampling in the existing oil sampling equipment, the present application proposes an oil sampling structure, including a sampling tube, a piston rod, a liquid inlet pipe, a stop valve, a sedimentation chamber, an exhaust pipe and a sampling tube; the liquid inlet pipe is connected to one end of the sampling tube, the other end of the sampling tube is a piston port, and the piston rod passes through the piston port and is slidably connected in the sampling tube; the stop valve is arranged on the liquid inlet pipe, and the stop valve is used to open or close the liquid inlet pipe; a first opening and a second opening are arranged on the side wall of the sedimentation chamber, and a third opening is arranged on the top wall of the sedimentation chamber, an end of the liquid inlet pipe away from the sampling tube is connected to the first opening, one end of the sampling tube is connected to the second opening, the other end of the sampling tube is used to be connected to the sampling interface of the transformer, the exhaust pipe is connected to the third opening, an exhaust valve is arranged on the exhaust pipe, and the exhaust valve is used to open or close the exhaust pipe.

[0049] When using the oil sampling structure of the present application for sampling, first close the stop valve, connect the sampling tube to the sampling interface of the transformer, and open the exhaust valve. At this time, the oil sample fills the entire sedimentation chamber, and the bubbles in the sedimentation chamber will be discharged from the exhaust pipe. When there are no bubbles discharged from the exhaust pipe, close the exhaust valve, open the stop valve, and pull the piston rod. At this time, the oil sample in the sedimentation chamber will enter the sampling tube from the sedimentation chamber through the liquid inlet pipe. At this time, there will be no bubbles in the oil sample flowing into the sampling tube, which solves the technical problem that bubbles are easy to enter the sampling tube when sampling in the existing oil sampling equipment, ensures that there are no bubbles in the sampling tube, and ensures the accuracy of the oil sample detection results.

[0050] The following specific embodiments are combined with the accompanying drawings to describe the technical solution of the application in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0051] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, Figure 1 A schematic diagram of the structure of the oil sampling structure provided in the embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle; Figure 3 for Figure 1 A schematic diagram of the enlarged structure at B in the middle; Figure 4 A schematic structural diagram of a quick connector in an oil sampling structure provided in an embodiment of the present application.

[0052] In the embodiments of this application, refer to Figures 1 to 3 As shown, an embodiment of the present application provides an oil sampling structure, including a sampling tube 100 , a piston rod 200 , a liquid inlet tube 300 , a stop valve 400 , a sedimentation chamber 500 , an exhaust pipe 600 and a sampling tube 700 .

[0053] The liquid inlet pipe 300 is connected to one end of the sampling tube 100 , and the other end of the sampling tube 100 is a piston port 110 . The piston rod 200 passes through the piston port 110 and is slidably connected in the sampling tube 100 .

[0054] The stop valve 400 is disposed on the liquid inlet pipe 300 , and the stop valve 400 is used to open or close the liquid inlet pipe 300 .

[0055] A first opening 510 and a second opening 520 are provided on the side wall of the sedimentation chamber 500, and a third opening 530 is provided on the top wall of the sedimentation chamber 500. One end of the liquid inlet pipe 300 away from the sampling tube 100 is connected to the first opening 510, one end of the sampling tube 700 is connected to the second opening 520, and the other end of the sampling tube 700 is used to be connected to the sampling interface of the transformer. The exhaust pipe 600 is connected to the third opening 530, and an exhaust valve 800 is provided on the exhaust pipe 600, and the exhaust valve 800 is used to open or close the exhaust pipe 600.

[0056] The sampling tube 100 of the present application is provided with a piston rod 200, and the piston rod 200 can be drawn back and forth in the sampling tube 100, similar to a syringe. By pushing and pulling the piston rod 200, the sampling tube 100 can be filled with oil sample or the oil sample can be discharged.

[0057] The sampling tube 100 is connected to the sedimentation chamber 500 through the liquid inlet tube 300. A stop valve 400 is provided on the liquid inlet tube 300. The stop valve 400 can open or close the liquid inlet tube 300, that is, to connect or close the sampling tube 100 and the sedimentation chamber 500.

[0058] The sedimentation chamber 500 has a accommodating cavity for accommodating the oil sample. A first opening 510 and a second opening 520 are provided on the side wall of the sedimentation chamber 500. A third opening 530 is provided on the top wall of the sedimentation chamber 500, that is, the third opening 530 is located above the first opening 510 and the second opening 520. The first opening 510 is connected to the end of the liquid inlet pipe 300 away from the sampling tube 100, the second opening 520 is connected to the sampling tube 700, and the third opening 530 is connected to the exhaust pipe 600. The exhaust pipe 600 is provided with an exhaust valve 800, and the exhaust valve 800 is used to open or close the exhaust pipe 600.

[0059] When using the oil sampling structure of the present application for sampling, first close the stop valve 400, connect the sampling tube 700 to the sampling interface of the transformer, and open the exhaust valve 800. At this time, the oil sample fills the entire sedimentation chamber 500, and the bubbles in the sedimentation chamber 500 will be discharged from the exhaust pipe 600. When there are no bubbles discharged from the exhaust pipe 600, close the exhaust valve 800, open the stop valve 400, and pull the piston rod 200. At this time, the oil sample in the sedimentation chamber 500 will enter the sampling tube 100 from the sedimentation chamber 500 through the liquid inlet pipe 300. At this time, there are no bubbles in the oil sample flowing into the sampling tube 100, which solves the technical problem that bubbles easily enter the sampling tube 100 when sampling in the existing oil sampling equipment, ensures that there are no bubbles in the sampling tube 100, and ensures the accuracy of the oil sample detection results.

[0060] In another embodiment, a drain pipe 900 is further included. A drain port 130 is provided on the side wall of the sampling tube 100 . One end of the drain pipe 900 is connected to the drain port 130 . A sealing cap 1000 is provided at the other end of the drain pipe 900 .

[0061] In this embodiment, a drain port 130 is provided on the side wall of the sampling tube 100. When in use, after the oil sample enters the sampling tube 100, the stop valve 400 is closed, the sealing cover 1000 is opened, and the inner wall of the sampling tube 100 can be cleaned by pushing and pulling the piston rod 200. The cleaned oil sample flows into the drain pipe 900 through the drain port 130 and is finally discharged from the drain pipe 900. After cleaning, the sealing cover 1000 is closed, and the stop valve 400 is opened again, so that sampling can be carried out.

[0062] In this embodiment, the inner wall of the sampling tube 100 is cleaned by a part of the oil sample, and the cleaned oil sample can be discharged from the drain pipe 900. After the discharge, the sealing cover 1000 can be closed to sample again, which is convenient and quick. In this embodiment, the inner wall of the sampling tube 100 is cleaned to ensure the accuracy of sampling and prevent impurity contamination. In this embodiment, the inner wall of the sampling tube 100 is cleaned by the oil sample to ensure that there is no other gas or liquid attached to the sampling tube 100, and even if there is attachment, it is the oil sample.

[0063] In other embodiments, a sleeve 1100 is further included, one end of which is connected to the first opening 510, and a plurality of sealing rings 1200 are arranged at intervals on the inner wall of the other end of the sleeve 1100, and one end of the liquid inlet pipe 300 away from the sampling tube 100 passes through each sealing ring 1200 in turn and is detachably connected in the sleeve 1100.

[0064] In this embodiment, the liquid inlet pipe 300 is detachably connected to the sleeve 1100. After sampling is completed, the liquid inlet pipe 300 can be separated from the sleeve 1100 to facilitate subsequent tests. Since a plurality of sealing rings 1200 are arranged at intervals on the inner wall of the other end of the sleeve 1100, the sealing between the liquid inlet pipe 300 and the sleeve 1100 is ensured to prevent air leakage and prevent air from entering to form bubbles.

[0065] Furthermore, a second sealing ring 1500 is provided at the end of the liquid inlet pipe 300 , thereby further improving the sealing performance between the liquid inlet pipe 300 and the sleeve 1100 .

[0066] In some embodiments, a quick connector 1300 is further included. The quick connector 1300 is connected to an end of the sampling tube 700 away from the second opening 520. The quick connector 1300 matches the sampling interface of the transformer and is used to communicate with the sampling interface.

[0067] In this embodiment, the quick connector 1300 matches the sampling interface of the transformer, so that the quick connector 1300 can be quickly installed at the sampling interface of the transformer, making it convenient for the transformer oil in the transformer to quickly enter the sampling tube 700.

[0068] In one embodiment, the first opening 510 is located below the second opening 520. In this embodiment, since the first opening 510 is located below the second opening 520, the oil sample in the sedimentation chamber 500 can quickly enter the sampling tube 100, thereby avoiding the accumulation of the oil sample in the sedimentation chamber 500 and preventing the oil sample in the sedimentation chamber 500 from flowing out from the second opening 520 in the reverse direction.

[0069] Furthermore, the first opening 510 is disposed at the bottom of the sedimentation chamber 500 , so that the oil sample in the sedimentation chamber 500 can be completely discharged from the first opening 510 .

[0070] In some possible embodiments, one end of the sampling tube 100 away from the piston port 110 is a liquid inlet 120 , the liquid inlet pipe 300 is connected to the liquid inlet 120 , and the liquid inlet 120 is located above the liquid discharge port 130 .

[0071] In this embodiment, the liquid discharge port 130 is located below the liquid inlet 120 , so that when draining, the oil sample can be completely discharged from the liquid discharge port 130 to avoid the accumulation of the oil sample at the liquid inlet 120 .

[0072] In another possible embodiment, the drain port 130 is located between the liquid inlet 120 and the piston port 110. In this embodiment, the drain port 130 is located between the liquid inlet 120 and the piston port 110, thereby ensuring that the oil sample can be discharged from the drain port 130 when the piston rod 200 is pumped, thereby improving the drain efficiency.

[0073] In other possible embodiments, the sealing cover 1000 is a sleeve, one end of the sleeve is an open end, the other end of the sleeve is a closed end, the inner cavity wall of the sleeve is provided with an internal thread, and the outer wall of the end of the drain pipe 900 away from the drain port 130 is provided with an external thread matching the internal thread. In this embodiment, the sealing cover 1000 is threadedly connected to the external thread of the outer wall of the end of the drain pipe 900 away from the drain port 130 through the internal thread, which facilitates the rapid disassembly of the sealing cover 1000. It should be noted that the sealing cover 1000 can also be connected to the drain pipe 900 by means of snap-on, plug-in, etc.

[0074] It should be noted that when the sealing cover 1000 is a sleeve, one end of the sleeve is open and the opening is used to cover the drain pipe 900, and the other end of the sleeve is a blocking cover to ensure that the liquid cannot flow out of the sleeve.

[0075] In some embodiments, a first sealing ring 1400 is disposed on the bottom wall of the inner cavity of the sleeve. Figure 3 As shown, in this embodiment, a first sealing ring 1400 is provided on the bottom wall of the sleeve, so that after the sleeve is installed on the drain pipe 900, the sealing between the sleeve and the drain pipe 900 is ensured.

[0076] In another embodiment, the inner diameter of the liquid inlet 120 is larger than the inner diameter of the liquid outlet 130. In this embodiment, the inner diameter of the liquid outlet 130 is reduced, thereby slowing down the liquid discharge speed, increasing the cleaning time, further ensuring the accuracy of sampling, and preventing impurity contamination.

[0077] In another possible embodiment, a third sealing ring 1600 is provided at the connection between the quick connector 1300 and the end of the sampling tube 700 away from the second opening 520. By providing the third sealing ring 1600, the sealing between the quick connector 1300 and the sampling tube 700 is ensured.

[0078] In summary, the present application proposes an oil sampling structure, including a sampling tube 100, a piston rod 200, a liquid inlet tube 300, a stop valve 400, a sedimentation chamber 500, an exhaust pipe 600 and a sampling tube 700; the liquid inlet tube 300 is connected to one end of the sampling tube 100, and the other end of the sampling tube 100 is a piston port 110, and the piston rod 200 passes through the piston port 110 and is slidably connected in the sampling tube 100; the stop valve 400 is arranged on the liquid inlet tube 300; a first opening 510 and a second opening 520 are arranged on the side wall of the sedimentation chamber 500, and a third opening 530 is arranged on the top wall of the sedimentation chamber 500, an end of the liquid inlet tube 300 away from the sampling tube 100 is connected to the first opening 510, the sampling tube 700 is connected to the second opening 520, the exhaust pipe 600 is connected to the third opening 530, and an exhaust valve 800 is arranged on the exhaust pipe 600.

[0079] When using the oil sampling structure of the present application for sampling, first close the stop valve 400, connect the sampling tube 700 to the sampling interface of the transformer, and open the exhaust valve 800. At this time, the oil sample fills the entire sedimentation chamber 500, and the bubbles in the sedimentation chamber 500 will be discharged from the exhaust pipe 600. When there are no bubbles discharged from the exhaust pipe 600, close the exhaust valve 800, open the stop valve 400, and pull the piston rod 200. At this time, the oil sample in the sedimentation chamber 500 will enter the sampling tube 100 from the sedimentation chamber 500 through the liquid inlet pipe 300. At this time, there are no bubbles in the oil sample flowing into the sampling tube 100, which solves the technical problem that bubbles easily enter the sampling tube 100 when sampling in the existing oil sampling equipment, ensures that there are no bubbles in the sampling tube 100, and ensures the accuracy of the oil sample detection results.

[0080] Those skilled in the art will readily appreciate other embodiments of the present application after considering the description and practicing the contents disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The description and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0081] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. An oil sampling structure, characterized in that: It comprises a sampling tube (100), a piston rod (200), a liquid inlet tube (300), a stop valve (400), a sedimentation chamber (500), an exhaust pipe (600) and a sampling tube (700); The liquid inlet pipe (300) is connected to one end of the sampling tube (100), the other end of the sampling tube (100) is a piston port (110), and the piston rod (200) passes through the piston port (110) and is slidably connected in the sampling tube (100); The stop valve (400) is arranged on the liquid inlet pipe (300), and the stop valve (400) is used to open or close the liquid inlet pipe (300); A first opening (510) and a second opening (520) are provided on the side wall of the sedimentation chamber (500), and a third opening (530) is provided on the top wall of the sedimentation chamber (500); one end of the liquid inlet pipe (300) away from the sampling pipe (100) is connected to the first opening (510), one end of the sampling pipe (700) is connected to the second opening (520), and the other end of the sampling pipe (700) is used to be connected to the sampling interface of the transformer; the exhaust pipe (600) is connected to the third opening (530), and an exhaust valve (800) is provided on the exhaust pipe (600), and the exhaust valve (800) is used to open or close the exhaust pipe (600).

2. The oil sampling structure according to claim 1, characterized in that: It also includes a drainage tube (900), a drainage port (130) is provided on the side wall of the sampling tube (100), one end of the drainage tube (900) is connected to the drainage port (130), and the other end of the drainage tube (900) is provided with a sealing cover (1000).

3. The oil sampling structure according to claim 1, characterized in that: It also includes a sleeve (1100), one end of which is connected to the first opening (510), and the inner wall of the other end of the sleeve (1100) is provided with a plurality of sealing rings (1200) at intervals, and the end of the liquid inlet pipe (300) away from the sampling tube (100) passes through each of the sealing rings (1200) in turn and is detachably connected to the sleeve (1100).

4. The oil sampling structure according to claim 1, characterized in that: It also includes a quick connector (1300), which is connected to the end of the sampling tube (700) away from the second opening (520), and the quick connector (1300) matches the sampling interface of the transformer, and the quick connector (1300) is used to communicate with the sampling interface.

5. The oil sampling structure according to any one of claims 1 to 4, characterized in that: The first opening (510) is located below the second opening (520).

6. The oil sampling structure according to claim 2, characterized in that: One end of the sampling tube (100) away from the piston port (110) is a liquid inlet (120), the liquid inlet pipe (300) is connected to the liquid inlet (120), and the liquid inlet (120) is located above the liquid discharge port (130).

7. The oil sampling structure according to claim 6, characterized in that: The liquid discharge port (130) is located between the liquid inlet (120) and the piston port (110).

8. The oil sampling structure according to claim 2, characterized in that: The sealing cover (1000) is a sleeve, one end of which is an open end and the other end of which is a closed end. The inner cavity wall of the sleeve is provided with an internal thread, and the outer wall of the end of the drain pipe (900) away from the drain port (130) is provided with an external thread matching the internal thread.

9. The oil sampling structure according to claim 8, characterized in that: A first sealing ring (1400) is provided on the bottom wall of the inner cavity of the sleeve.

10. The oil sampling structure according to claim 6, characterized in that: The inner diameter of the liquid inlet (120) is greater than the inner diameter of the liquid outlet (130).

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