Aviation kerosene closed-circuit sampler with rapid cleaning device

Abstract

The utility model provides an aviation kerosene closed-circuit sampler with a quick cleaning device, which can reduce the cleaning difficulty of the closed-circuit sampler and improve the cleaning efficiency, the closed-circuit sampler comprises a closed-circuit sampler body and a quick cleaning device, one end of the closed-circuit sampler body is provided with a sealing cover, and the other end of the closed-circuit sampler body is provided with a quick cleaning device. A through hole for inserting the quick cleaning device is formed in the center of the sealing cover; the rapid cleaning device is assembled on the central column, and the rapid cleaning assembly can clean the side wall and the bottom wall of the closed-circuit sampler body through rotation.

Description

Technical Field

[0001] The utility model relates to the field of cleaning of aviation kerosene closed-circuit samplers, in particular to an aviation kerosene closed-circuit sampler with a quick cleaning device. Background Art

[0002] During the receipt, storage, transportation, and delivery of aviation kerosene, oil quality sampling and testing are required. Testing includes cleanliness, density, temperature, and water content before and after filtration. Currently, most oil depots conduct quality testing by directing the oil through a drainage pipe into a closed-circuit sampler for visual observation.

[0003] Since closed-circuit samplers are generally used in aviation refueling trucks and ground oil pipeline systems, they are installed next to the refueling truck filters and oil-water separators in oil depots. They are exposed to high temperatures and strong winds for a long time, which makes them prone to dust accumulation. Secondly, when there are impurities and moisture in the aviation kerosene, they will adhere to the glass cylinder wall of the closed-circuit sampler. Long-term use will cause sludge and dirt to accumulate on the glass cylinder wall and the bottom of the closed-circuit sampler, making it difficult to clean. Moreover, aviation kerosene is quite corrosive and oxidizing, which will cause corrosion and oxidation to the metal components at the bottom of the closed-circuit sampler, resulting in irreversible metal corrosion. Therefore, improper cleaning and maintenance during daily use will seriously affect the detection effect of the closed-circuit sampler.

[0004] The current maintenance method for closed-circuit samplers is: after a period of use, when the closed-circuit sampler needs to be cleaned, professional technicians are arranged to disassemble the components, polish with oil paper, clean with oil-resistant cloth, and install it. The maintenance process is complicated and can easily cause equipment damage. If the installation is not appropriate, it is also prone to accidents such as leakage. It has problems such as high risk factor, complicated cleaning process, and heavy workload for technicians. Utility Model Content

[0005] The purpose of the utility model is to provide an aviation kerosene closed-circuit sampler with a quick cleaning device, which can reduce the cleaning difficulty of the closed-circuit sampler and improve the cleaning efficiency.

[0006] The embodiment of the present utility model is achieved as follows:

[0007] A closed-circuit sampler for aviation kerosene with a quick-cleaning device comprises: a closed-circuit sampler body and a quick-cleaning device. A cover is provided at one end of the closed-circuit sampler body, and a through hole for inserting the quick-cleaning device is provided at the center of the cover. The quick-cleaning device is assembled on a central column and can clean the side walls and bottom wall of the closed-circuit sampler body by rotating.

[0008] In a preferred embodiment of the present invention, the above-mentioned quick cleaning device includes: a rotating lifting rod, a side wall cleaning assembly and a bottom wall cleaning assembly. The rotating lifting rod is inserted from the middle of the cover, and the lower part of the rotating lifting rod is provided with a first hinge point; the top of the side wall cleaning assembly is connected to the first hinge point, and the left and right ends of the side wall cleaning assembly are provided with a first scraper, and the middle part of the side wall cleaning assembly is provided with a spacing adjuster connecting the first scrapers at both ends; the top of the bottom wall cleaning assembly is connected to the bottom of the side wall cleaning assembly, and the bottom of the bottom wall cleaning assembly is provided with a second scraper, and the bottom shape of the second scraper matches the bottom shape of the closed-circuit sampler body.

[0009] In a preferred embodiment of the present invention, the above-mentioned rotating lifting rod includes: a lifting rod and a rotating disk, a first hinge point is provided at the bottom of the lifting rod; a rocker is provided at the top of the lifting rod; the lifting rod is assembled at the center of the rotating disk, and when the rocker rotates, it drives the lifting rod to rotate based on the rotating disk.

[0010] In a preferred embodiment of the present invention, the above-mentioned side wall cleaning assembly includes: a parallelogram connecting frame and a first wall scraper, and each of the four corners of the parallelogram connecting frame is provided with a hinge point, which are the first hinge point, the second hinge point, the fourth hinge point and the fourth hinge point clockwise, and a spacing adjuster is connected between the second hinge point and the fourth hinge point; the third hinge point is connected to the bottom wall cleaning assembly; the first wall scraper is composed of a clamp and a nitrile scraper, one end of the clamp is fixedly connected to the second hinge point / fourth hinge point, and the other end of the clamp is provided with a threaded hole; one end of the nitrile scraper is provided with a threaded connecting column fixedly connected to the threaded hole; the other end of the nitrile scraper is a scraper body made of oil-resistant nitrile material, and the scraper body is in contact with the side wall of the closed-circuit sampler body.

[0011] In a preferred embodiment of the present invention, the parallelogram connection frame further comprises a sliding plate, a linear sliding groove is provided on the sliding plate, the second hinge point and the fourth hinge point are assembled on the linear sliding groove and slide freely on the linear sliding groove.

[0012] In a preferred embodiment of the present invention, the above-mentioned bottom wall cleaning assembly includes: a connecting rod and a bottom wall cleaner, and a plurality of connection points are arranged at equal intervals on the connecting rod; each of the four corners of the bottom wall cleaner is provided with a hinge point, which are the fifth hinge point, the sixth hinge point, the seventh hinge point and the eighth hinge point clockwise respectively, and the sixth hinge point, the seventh hinge point and the eighth hinge point are provided with a detachable nitrile cap cover, so that the nitrile cap cover covers the bottom and part of the side surface of the bottom wall cleaner, and the shape of the nitrile cap cover matches the shape of the bottom wall of the closed-circuit sampler body.

[0013] In a preferred embodiment of the present invention, the above-mentioned closed-circuit sampler also includes a center column, a through hole for the rotating lifting rod to pass through is provided at the axial center of the center column, a hexagonal space for accommodating part of the side wall cleaning assembly is provided in the middle of the center column; a notch for limiting the adjustment angle of the bottom wall cleaning assembly is provided at the bottom of the center column.

[0014] In a preferred embodiment of the present invention, the rotating disk is embedded in the central column.

[0015] The beneficial effects of the embodiments of the present utility model are:

[0016] The aviation kerosene closed-circuit sampler of the utility model does not need to be disassembled. It is directly installed on the cover port of the closed-circuit sampler and fixed. Then, the side wall cleaning component / bottom wall cleaning component is lifted or squeezed by rotating the lifting rod. The quick cleaning device can be applied to closed-circuit samplers of different sizes. At the same time, the acting force between the quick cleaning device and the glass cylinder of the closed-circuit sampler is adjusted to improve the application range of the device, thereby avoiding the problem of the glass cylinder of the closed-circuit sampler rotating during the process of cleaning the pipe wall of the pressure pipe; the side wall cleaning component and the bottom wall cleaning component can be moved up and down and rotated in the glass wall of the closed-circuit sampler, thereby achieving the effect of cleaning dirt on the glass wall of the closed-circuit sampler. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic structural diagram of a closed-circuit sampler according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic structural diagram of a quick cleaning device according to an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the sliding plate structure of an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the connecting rod structure of an embodiment of the utility model;

[0022] Icons: Closed-circuit sampler body 001; quick cleaning device 100; cover 110; rotating lifting rod 120; lifting rod 121; rotating disk 122; rocker 123; center column 124; side wall cleaning assembly 130; first hinge point 131; first scraper 132; clamper 1321; nitrile scraper 1322; spacing adjuster 133; second hinge point 134; third hinge point 135; fourth hinge point 136; sliding plate 137; linear sliding groove 1371; bottom wall cleaning assembly 140; connecting rod 141; bottom wall cleaner 142; fifth hinge point 143; sixth hinge point 144; seventh hinge point 145; eighth hinge point 146; nitrile cap 147; spring 148; second linear slide groove 149. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0028] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] First embodiment

[0030] See Figure 1-4 This embodiment provides an aviation kerosene closed-circuit sampler with a quick cleaning device. The closed-circuit sampler includes: a closed-circuit sampler body 001 and a quick cleaning device 100 for cleaning the closed-circuit sampler body 001.

[0031] Specifically, a cover 110 is provided at one end of the closed-circuit sampler body 001. A through-hole is provided in the center of the cover 110 for inserting the quick-cleaning device 100. In this technical solution, the cover 110 can be the same as the one used in the closed-circuit sampler, or a dedicated cover 110 can be provided that is attached to the top of the closed-circuit sampler body 001. In this embodiment, a dedicated cover 110 is used, and the rotating disk can be fixed to the dedicated cover 110, so that the cover 110 and the quick-cleaning device 100 form a single unit, which can reduce the assembly time of the quick-cleaning device 100. However, if the original cover 110 is used instead of the dedicated cover 110, the assembly time is only required for assembly and tightening. The quick-cleaning device 100 is assembled on the cover 110 and can be rotated to clean the side and bottom walls of the closed-circuit sampler body 001. To protect the closed-circuit sampler body 001 and ensure a good seal during cleaning, a flexible sealing ring is provided at the bottom of the cover 110.

[0032] More specifically, the quick cleaning device 100 in this technical solution can also be used to clean closed-circuit samplers of different sizes, and adjust the force applied to the closed-circuit sampler body 001 during the cleaning process. The quick cleaning device 100 includes: a rotating lifting rod 120, a side wall cleaning assembly 130 connected to the rotating lifting rod 120, and a bottom wall cleaning assembly 140.

[0033] The rotating lifting rod 120 is inserted from the middle of the cover 110, and a first hinge point 131 is provided at the lower part of the rotating lifting rod 120 for assembling the side wall cleaning assembly 130; the top of the side wall cleaning assembly 130 is connected to the first hinge point 131, and the left and right ends of the side wall cleaning assembly 130 are provided with first scrapers 132, and the middle part of the side wall cleaning assembly 130 is provided with a spacing adjuster 133 connecting the first scrapers 132 at both ends, which is used to adaptively adjust the distance between the two first scrapers 132 so that the first scrapers 132 are always in contact with the side wall to remove oil stains or metal oxides, etc.; the top of the bottom wall cleaning assembly 140 is connected to the bottom of the side wall cleaning assembly 130, that is, the bottom cleaning assembly is arranged below the side wall cleaning assembly 130, and the bottom of the bottom wall cleaning assembly 140 is provided with a second scraper, and the bottom shape of the second scraper matches the bottom shape of the closed-circuit sampler body 001, and can remove oil stains or metal oxides on the bottom wall during rotation.

[0034] Furthermore, the rotating lifting rod 120 specifically includes: a lifting rod 121 and a rotating disk 122, wherein the lifting rod 121 is a cylindrical rod body, and a first hinge point 131 is provided at the bottom of the lifting rod 121 for connecting to the side wall cleaning assembly 130. A rocker is provided at the top of the lifting rod or the top of the lifting rod is connected to the rotating output shaft.

[0035] When only a few closed-circuit samplers are to be cleaned, a rocker arm 123 is provided at the top of the lifting rod 121, which can lift and rotate the cleaning components manually; if the top of the lifting rod 121 is assembled on an automated output rod or rotating rod, it can complete automated batch cleaning and automatic collection of waste liquid and other functions, thereby improving the cleaning effect and efficiency, intelligent control, good reliability and higher safety factor; the lifting rod 121 is assembled at the center of the rotating disk 122, and when the rocker arm 123 rotates, it drives the lifting rod 121 to rotate based on the rotating disk 122.

[0036] The side wall cleaning assembly 130 is mainly used for cleaning the side wall, and includes: a parallelogram connection frame 133 and a first wall scraper 132 arranged on both sides of the parallelogram connection frame 133, wherein the parallelogram connection frame 133 is a parallelogram structure formed by four hinge blocks connected in sequence.

[0037] A hinge point is set on each of the four corners of the parallelogram connection frame 133, so that it forms a stretchable and transformable parallelogram. Starting from the top, clockwise, they are the first hinge point 131, the second hinge point 134, the third hinge point 135 and the fourth hinge point 136, among which a spacing adjuster 133 is connected between the second hinge point 134 and the fourth hinge point 136. In this embodiment, the spacing adjuster 133 is a spring. In other embodiments, it can be a friction type, hydraulic type, electromagnetic type or other structures that can perform self-adjustment of spacing; the third hinge point 135 is connected to the bottom wall cleaning component 140.

[0038] In order to further limit and enhance the connection and support effect of the parallelogram connection frame 133, the closed-circuit sampler in this embodiment is provided with a central column 124, which can be embedded in the rotating disk 122 so that the central column 124 rotates together during the rotation process. The central column 124 is preferably a cylindrical central column 124, and a through hole for the rotating lifting rod 120 to pass through is provided in the axial center of the central column 124. The lifting rod 121 moves axially (up and down) in the through hole. A hexagonal space is provided in the middle of the central column 124 to accommodate part of the side wall cleaning assembly 130, for example, at the lifting rod 1 21 During the lifting process, the top of the parallelogram connection frame 133 is squeezed, so that the distance between the second hinge point 134 and the fourth hinge point 136 is expanded, and the spring is stretched, so that the first scraper 132 connected by the second hinge point 134 and the fourth hinge point 136 is in contact with the side wall, and the stains are scraped out during the rotation process; the bottom of the central column 124 is provided with a notch that limits the adjustment angle of the bottom wall cleaning component 140. For example, when the lifting rod 121 is lifted, the fifth hinge point moves downward and the entire bottom wall cleaner is stretched open, and the bottom wall cleaner is pressed against the bottom groove, and then the stains in the bottom groove are cleaned through rotation.

[0039] The first wall scraper 132 is composed of a clamper 1321 and a nitrile scraper 1322. One end of the clamper 1321 is fixedly connected to the second hinge point 134 / the fourth hinge point 136, and the other end of the clamper 1321 is provided with a threaded hole; one end of the nitrile scraper 1322 is provided with a threaded connection column fixedly connected to the threaded hole, and the nitrile scraper 1322 and the clamper 1321 are threadedly connected; the other end of the nitrile scraper 1322 is a scraper body made of oil-resistant nitrile material, and the scraper body is fitted with the side wall of the closed-circuit sampler body 001.

[0040] In order to further ensure the adjustment stability of the parallelogram connecting frame 133, a sliding plate 137 is also provided at the position of the parallelogram connecting frame 133. A linear sliding groove 1371 is provided at the middle position in the length direction of the sliding plate 137. The second hinge point 134 and the fourth hinge point 136 are assembled on the linear sliding groove 1371 and slide freely on the linear sliding groove 1371. In order to achieve the above function, the assembly column at the hinge point can be set to a structure with one end as a hinge column and the other end as a slider. Of course, other structures that can achieve this function can also be selected, all of which belong to the same or similar concepts of the present utility model.

[0041] The bottom wall cleaning assembly 140 is mainly used to clean the bottom wall, and includes: a connecting rod 141 and a bottom wall cleaner 142, which can also realize adaptive width adjustment. Like the side wall cleaning assembly 130, a parallelogram structure can be adopted, and the bottom wall cleaner 142 is set as a parallelogram structure composed of four hinged blocks. The four corners of the bottom wall cleaner 142 are each provided with a hinge point, which can be connected to the side wall cleaning assembly 130. From the top, they are the fifth hinge point 143, the sixth hinge point 144, the seventh hinge point 145 and the eighth hinge point 146 respectively. The sixth hinge point 144, the seventh hinge point 145 and the eighth hinge point 146 are provided with a detachable nitrile cap 147, so that the nitrile cap 147 covers the bottom and part of the side surface of the bottom wall cleaner 142. The shape of the nitrile cap 147 matches the shape of the bottom wall of the closed-circuit sampler body 001.

[0042] It can also be a flexible bottom wall cleaner with a conical bottom or a truncated cone bottom, by setting two symmetrical sixth hinge points 144 and an eighth hinge point 146 on the ring side of the truncated cone bottom, and setting a slidable fifth hinge point 143 on the connecting rod 141. Since the truncated cone bottom is made of flexible material, the bottom wall cleaner can be adaptively deformed according to the internal space of the closed-circuit sampler body, and can also be applied to closed-circuit samplers of different specifications.

[0043] A second linear slot 149 is provided on the connecting rod 141, so that the fifth hinge point 143 can be adaptively adjusted in the vertical direction. Similarly, a spring 148 is provided at the fifth hinge point 143 and the seventh hinge point 145 for support and adaptive adjustment.

[0044] The method for using the aviation kerosene closed-circuit sampler with a quick cleaning device includes the following steps:

[0045] Step S1, directly installing the quick cleaning device on the cover of the closed-circuit sampler and fixing it;

[0046] Step S2, the quick cleaning device can be adapted to closed-circuit samplers of different sizes by rotating the lifting rod, and the force between the device and the glass cylinder of the closed-circuit sampler can be adjusted;

[0047] Step S3: After determining the width and force of the side wall cleaning assembly 130 and the bottom wall cleaning assembly 140, the rapid cleaning device is rotated within the glass wall of the closed-circuit sampler, thereby driving the cleaning assembly to clean the glass wall of the closed-circuit sampler as the central column rotates, thereby achieving the effect of cleaning dirt on the glass wall of the closed-circuit sampler;

[0048] Step S4: pull up the quick cleaning device to collect and clean the dirt and waste liquid on the glass wall of the closed-circuit sampler.

[0049] In summary, the aviation kerosene closed-circuit sampler in the present invention does not need to be disassembled. It can be directly installed on the cover 110 of the closed-circuit sampler and fixed. Then, by rotating the lifting rod 120, the side wall cleaning assembly 130 / bottom wall cleaning assembly 140 is lifted or squeezed. The quick cleaning device 100 can be adapted to closed-circuit samplers of different sizes. At the same time, the force between the quick cleaning device 100 and the glass cylinder of the closed-circuit sampler can be adjusted to improve the applicability of the device, thereby avoiding the problem of the glass cylinder of the closed-circuit sampler rotating during the cleaning process of the pipe wall of the pressure pipe; the side wall cleaning assembly 130 and the bottom wall cleaning assembly 140 can be moved up and down and rotated in the glass wall of the closed-circuit sampler, thereby achieving the effect of cleaning dirt on the glass wall of the closed-circuit sampler.

[0050] This specification describes examples of embodiments of the present invention and does not mean that these embodiments illustrate and describe all possible forms of the present invention. It should be understood that the embodiments in the specification can be implemented in a variety of alternative forms. The drawings do not need to be drawn to scale; some features can be enlarged or reduced to show the details of specific components. The specific structural and functional details disclosed should not be interpreted as limiting, but are merely representative bases for teaching those skilled in the art to implement the present invention in various forms. It should be understood by those skilled in the art that the multiple features illustrated and described with reference to any one of the figures can be combined with the features illustrated in one or more other figures to form embodiments that are not explicitly illustrated or described. The illustrated combined features provide representative embodiments for typical applications. However, various combinations and variations of features consistent with the teachings of the present invention can be used for specific applications or implementations as needed.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A closed-circuit aviation kerosene sampler with a quick cleaning device, characterized in that: The closed-circuit sampler comprises: A closed-circuit sampler body, wherein one end of the closed-circuit sampler body is provided with a cover, and the center of the cover is provided with a through hole for inserting the quick cleaning device; A quick cleaning device is assembled on the cover, and can clean the side walls and bottom wall of the closed-circuit sampler body by rotating. The width of the quick cleaning device can be adjusted by stretching or squeezing.

2. The aviation kerosene closed-circuit sampler with a quick cleaning device according to claim 1, characterized in that: The quick cleaning device comprises: A rotating lifting rod, wherein the rotating lifting rod is inserted from the middle of the cover, and a first hinge point is provided at the lower portion of the rotating lifting rod; a side wall cleaning assembly, wherein the top of the side wall cleaning assembly is connected to the first hinge point, the left and right ends of the side wall cleaning assembly are provided with first wall scrapers, and the middle portion of the side wall cleaning assembly is provided with a spacing adjuster connecting the first wall scrapers at both ends; A bottom wall cleaning assembly, the top of which is connected to the bottom of the side wall cleaning assembly, a second wall scraper is provided at the bottom of the bottom wall cleaning assembly, and the bottom shape of the second wall scraper matches the bottom shape of the closed-circuit sampler body.

3. The aviation kerosene closed-circuit sampler with a quick cleaning device according to claim 2, characterized in that: The rotating lifting rod comprises: a lifting rod, wherein the first hinge point is provided at the bottom of the lifting rod; The rotating disk has the lifting rod assembled at the center thereof. When the lifting rod rotates, the lifting rod is driven to rotate based on the rotating disk.

4. The aviation kerosene closed-circuit sampler with a quick cleaning device according to claim 2, characterized in that: The sidewall cleaning assembly comprises: A parallelogram connection frame, wherein each of the four corners of the parallelogram connection frame is provided with a hinge point, which are respectively the first hinge point, the second hinge point, the fourth hinge point and the fourth hinge point in clockwise direction, the spacing adjuster is connected between the second hinge point and the fourth hinge point; the fourth hinge point is connected to the bottom wall cleaning assembly; The first wall scraper consists of a clamp and a nitrile scraper, one end of the clamp is fixedly connected to the second hinge point / fourth hinge point, and the other end of the clamp is provided with a threaded hole; one end of the nitrile scraper is provided with a threaded connection column fixedly connected to the threaded hole; the other end of the nitrile scraper is a scraper body made of oil-resistant nitrile material, and the scraper body is in contact with the side wall of the closed-circuit sampler body.

5. The aviation kerosene closed-circuit sampler with a quick cleaning device according to claim 4, characterized in that: The parallelogram connection frame further comprises a sliding plate, on which a first linear sliding groove is provided. The second hinge point and the fourth hinge point are assembled on the linear sliding groove and slide freely on the linear sliding groove.

6. The aviation kerosene closed-circuit sampler with a quick cleaning device according to claim 2, characterized in that: The bottom wall cleaning assembly comprises: A connecting rod, wherein the connecting rod is provided with a second linear slide groove; The bottom wall cleaner is provided with a hinge point at each of the four corners of the bottom wall cleaner, which are the fifth hinge point, the sixth hinge point, the seventh hinge point and the eighth hinge point respectively in clockwise direction. The fifth hinge point is assembled in the second linear slide groove, and the sixth hinge point, the seventh hinge point and the eighth hinge point are provided with a detachable nitrile cap sleeve, so that the nitrile cap sleeve covers the bottom and part of the side surface of the bottom wall cleaner, and the shape of the nitrile cap sleeve matches the shape of the bottom wall of the closed-circuit sampler body.

7. The aviation kerosene closed-circuit sampler with a quick cleaning device according to claim 3, characterized in that: The closed-circuit sampler also includes a central column, a through hole for a rotating lifting rod to pass through is provided at the axial center of the central column, a hexagonal space for accommodating part of the side wall cleaning assembly is provided in the middle of the central column; a notch is provided at the bottom of the central column for limiting the adjustment angle of the bottom wall cleaning assembly.

8. The aviation kerosene closed-circuit sampler with a quick cleaning device according to claim 3, characterized in that: The top of the lifting rod is provided with a rocker or the top of the lifting rod is connected to a rotation output shaft.

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