A visual fuel tank cleaning cover

Abstract

The present invention discloses a visual oil tank cleaning cover, comprising a cover body, wherein a plurality of bosses distributed at equal angles are arranged on the outer curved surface of the cover body, and mounting holes are arranged in the bosses, an inner viewing groove is arranged in the cover body, and the inner viewing groove is closed by an acrylic plate or a glass plate, and a staff can observe the oil quality in the oil tank installed with the present invention through the inner viewing groove; a fixed platform is arranged on the left side surface of the cover body, a sampler is connected to the fixed platform through a lifting mechanism, and the sampler can scrape the inner bottom wall of the oil tank through a scraper, and the staff can observe whether there is mud and dirt on the transverse bending part of the scraper in the sampler to decide whether to disassemble the present invention and clean the inside of the oil tank; the staff can control the operation of the sampler or control the angle of the light shielding plate used to close the inner viewing groove by controlling the controlled axis, and the operation is simple and the learning cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of oil tanks, and in particular to a visual oil tank cleaning cover. Background Art

[0002] A fuel tank is a container for storing fuel on motorized equipment. The fuel inlet and outlet in the fuel tank are generally designed to be smaller in size. In order to facilitate the cleaning of the inside of the fuel tank, an additional cleaning port is generally opened on the fuel tank, and the cleaning port is sealed with a fuel tank cleaning cover. When the staff needs to clean the fuel tank, they need to remove the fuel tank cleaning cover.

[0003] As shown in a cleaning cover for a fuel tank disclosed in application number CN201720261441.6, current fuel tank cleaning covers are generally disc-shaped and made of metal. Workers cannot observe the inside of the fuel tank through the cleaning cover, and generally workers determine the next cleaning time of the fuel tank based on the cleaning cycle. However, the start-up time of the equipment in each cleaning cycle is different, and the amount of dirt accumulated in the fuel tank is positively correlated with the fuel consumption of the equipment. If the fuel tank cleaning time is determined only based on the time interval, it is easy to cause insufficient maintenance when the equipment is used at a high rate. Therefore, it is necessary to improve the existing fuel tank cleaning cover. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a visual fuel tank cleaning cover to solve the problems mentioned in the above background technology.

[0005] The present invention provides the following technical solution: a visual oil tank cleaning cover, comprising a cover body, a plurality of bosses distributed at equal angles are mounted on the outer curved surface of the cover body, and mounting holes are arranged in the bosses, an inner viewing groove is arranged in the cover body, and the inner viewing groove is closed by an acrylic plate or a glass plate;

[0006] A fixing platform is installed on the left side surface of the cover body, and a sampler is connected to the fixing platform via a lifting mechanism;

[0007] The sampler includes a shell, a rotating shaft and a scraper. The rotating shaft is rotatably connected to the shell, and the scraper is fixed on the curved surface of the rotating shaft. The lower edge of the scraper is laterally bent, and also includes a sampling mechanism for controlling the rotation of the scraper.

[0008] Preferably, the lifting mechanism includes a reciprocating screw rotatably connected to the lower side of the fixed table, a lifting plate is connected to the reciprocating screw, and the sampler is installed on the lifting plate. The lower side of the fixed table is also equipped with a through rod passing through the lifting plate, and also includes a driving mechanism for driving the reciprocating screw to rotate.

[0009] Preferably, the driving mechanism comprises a driving shaft rotatably connected to the lower side of the fixed platform, a first bevel gear is mounted on the driving shaft, and the driving shaft is connected to the reciprocating screw via a first synchronous belt;

[0010] A through groove is fixedly provided in the inner viewing groove, and a sliding sleeve is fixedly provided in the through groove, and two annular grooves distributed on the left and right are provided in the inner curved surface of the sliding sleeve, and a controlled shaft is also slidably connected to the left and right and rotatably connected in the through groove, and a mounting groove is provided in the outer curved surface of the controlled shaft, and a positioning plate inserted into the annular groove is connected in the mounting groove through a No. 1 spring, and the outer curved surface of the positioning plate and the left and right side surfaces thereof are rounded;

[0011] A handle is also arranged at the end of the controlled shaft, and a second bevel gear capable of meshing with the first bevel gear is arranged at the left end of the controlled shaft.

[0012] Preferably, a plurality of straight slide grooves are provided in the lower side surface of the lifting plate, a slide rod inserted into the straight slide groove is provided on the upper side surface of the shell, and the slide rod is connected to the bottom surface of the lifting plate through a No. 2 spring, the sampling mechanism includes a No. 1 rack provided on the lower side surface of the lifting plate, and the No. 1 rack extends into the shell, and two transmission shafts distributed up and down are rotatably connected to the inner wall of the shell, and the two transmission shafts are connected by a No. 2 synchronous belt, and the end of the transmission shaft located on the upper side is equipped with a No. 1 spur gear meshing with the No. 1 rack, the rotating shaft is vertically arranged, and the transmission shaft located on the lower side is connected to the rotating shaft through a bevel gear set.

[0013] Preferably, it further comprises a closing mechanism, the closing mechanism comprises a bracket slidably connected to the front and rear sides of the shell, and the ends of the brackets are connected together with a horizontal plate, the lower side of the horizontal plate is provided with a lifting groove, and the lifting groove is slidably connected to a vertical plate that cannot be separated from the lifting groove and extends to the lower side of the horizontal plate, and the bottom of the vertical plate is integrally formed with a shielding plate, and the shielding plate can be attached to the bottom of the shell;

[0014] A circular groove is provided in the horizontal plate, an internal threaded shaft is rotatably connected in the circular groove, and a push rod is slidably connected to the circular groove left and right, the push rod is threadedly connected to the internal threaded shaft, and the horizontal plate is also connected to the side of the shell through a No. 3 spring, a No. 2 spur gear is installed on the internal threaded shaft, and a No. 2 rack is slidably connected to the horizontal plate up and down, and the No. 2 rack is meshed with the No. 2 spur gear.

[0015] Preferably, the closing mechanism is provided with two groups distributed front and back, and the shielding plates in the two closing mechanisms can abut against each other.

[0016] Preferably, the No. 1 rack is a cylindrical rack.

[0017] Preferably, it further comprises a shading plate, wherein the shading plate and the inner viewing groove are both fan-shaped, and a driving plate is arranged on the inner curved surface of the shading plate, and the driving plate is sleeved outside the controlled shaft and can be connected to the controlled shaft;

[0018] There is a certain friction between the shading plate and the side surface of the cover body.

[0019] Preferably, a control disk is fixedly provided on the controlled shaft, and the control disk is located between the driving plate and the second bevel gear.

[0020] Preferably, with the axis of the controlled shaft as the center, a plurality of friction ridges are provided at equal angles on the side surface of the control disk close to the driving plate, and a plurality of friction grooves are provided at equal angles on the side surface of the driving plate.

[0021] The present invention provides a visual fuel tank cleaning cover, which has the following beneficial effects:

[0022] The present invention is provided with an inner viewing slot, and the staff can observe the oil quality in the oil tank installed with the present invention through the inner viewing slot;

[0023] The present invention is also provided with a sampler, and the sampler can scrape the inner bottom wall of the oil tank through a scraper, and the staff can observe whether there is dirt on the transverse bending part of the scraper in the sampler to decide whether to disassemble the present invention and clean the inside of the oil tank;

[0024] The staff can control the operation of the sampler or the angle of the light shield used to close the inner viewing slot through the controlled axis. The operation is simple and the learning cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the appearance of the present invention;

[0026] Figure 2 is a schematic diagram of the appearance of the present invention from another viewing angle;

[0027] Figure 3 yes Figure 2 Schematic diagram of the appearance at the controlled axis;

[0028] Figure 4 It is a schematic diagram of the structure in the controlled shaft of the present invention;

[0029] Figure 5 It is a schematic diagram of the appearance of the sampler in the present invention;

[0030] Figure 6 yes Figure 5 Schematic diagram of the structure inside the sampler;

[0031] Figure 7 yes Figure 6A magnified schematic diagram of center A.

[0032] In the figure:

[0033] 11. Cover body; 12. Inner viewing groove; 21. Fixed table; 22. Reciprocating screw; 23. Lifting plate; 24. Through rod; 25. Drive shaft; 26. Sliding sleeve; 27. Controlled shaft; 28. Positioning plate; 31. Housing; 32. Rotating shaft; 33. Scraper; 34. Sliding rod; 35. Rack No. 1; 36. Transmission shaft; 37. Bevel gear set; 38. Cross plate; 39. Vertical plate; 40. Shielding plate; 41. Internally threaded shaft; 42. Retaining rod; 43. Rack No. 2; 51. Shading plate; 52. Driving plate; 53. Control panel. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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 the present invention can be understood according to specific circumstances.

[0038] Reference Figure 1-Figure 7 According to an embodiment of a visual fuel tank cleaning cover of the present invention, the cover body 11 includes a cover body 11, a plurality of bosses distributed at equal angles are mounted on the outer curved surface of the cover body 11, and mounting holes are arranged in the bosses, an inner viewing groove 12 is arranged in the cover body 11, and the inner viewing groove 12 is closed by an acrylic plate or a glass plate;

[0039] A fixing platform 21 and a sealing ring are mounted on the left side of the cover body 11, and a sampler is connected to the fixing platform 21 via a lifting mechanism;

[0040] The sampler includes a housing 31, a rotating shaft 32 and a scraper 33. The rotating shaft 32 is rotatably connected to the housing 31, and the scraper 33 is fixed on the curved surface of the rotating shaft 32. The lower edge of the scraper 33 is transversely bent. The sampler also includes a sampling mechanism for controlling the rotation of the scraper 33. When the visual oil tank cleaning cover is installed on the oil tank and the lifting mechanism controls the sampler to reach the bottom of the oil tank, the sampling mechanism can drive the scraper 33 to rotate, so that the oil and dirt at the bottom of the oil tank are scraped off by the scraper 33, and the oil and dirt at the bottom of the oil tank are scraped off by the scraper 33. The scraper 33 is supported by the lateral bend at the lower edge of the blade 33, and then the staff can drive the sampler upward through the lifting mechanism, and the staff can observe the thickness of mud and dirt on the scraper 33 through the inner viewing groove 12, and then decide whether to remove the cover body 11 and clean the oil tank equipped with the cover body 11. It should be noted that the shell 31 is a transparent material of acrylic or glass, so that the staff can observe the thickness of mud and dirt on the scraper 33 through the inner viewing groove 12 and the shell 31, and after removing the cover body 11, the scraper 33 also needs to be cleaned.

[0041] In this embodiment, the lifting mechanism includes a reciprocating screw 22 rotatably connected to the lower side of the fixed table 21, a lifting plate 23 is connected to the reciprocating screw 22, and the sampler is installed on the lifting plate 23. The lower side of the fixed table 21 is also equipped with a through rod 24 that penetrates the lifting plate 23 to prevent the lifting plate 23 and the sampler from rotating when the reciprocating screw 22 rotates, resulting in the inability to lift and lower. It also includes a driving mechanism for driving the reciprocating screw 22 to rotate.

[0042] The driving mechanism includes a driving shaft 25 rotatably connected to the lower side of the fixed platform 21, a first bevel gear is mounted on the driving shaft 25, and the driving shaft 25 is connected to the reciprocating screw 22 via a first synchronous belt;

[0043] A through groove is fixedly provided in the cover plate 11, and a sliding sleeve 26 is fixedly provided in the through groove, and two annular grooves distributed on the left and right are provided in the inner curved surface of the sliding sleeve 26, and a controlled shaft 27 is also slidably connected to the left and right and rotatably connected in the sliding sleeve 26, and a mounting groove is provided in the outer curved surface of the controlled shaft 27, and a positioning plate 28 inserted into the annular groove is connected in the mounting groove through a No. 1 spring, and the outer curved surface of the positioning plate 28 and the left and right side surfaces thereof are rounded so that the positioning plate 28 can switch in the two annular grooves. Specifically, when the staff pushes or pulls the controlled shaft 27 with force, the positioning plate 28 can switch in the two annular grooves, and the positioning plate 28 will penetrate into the mounting groove during the switching process.

[0044] The left end of the controlled shaft 27 is provided with a second bevel gear that can mesh with the first bevel gear. The controlled shaft 27 is also provided with a handle, through which the staff can control the left and right positions of the controlled shaft 27 and can drive the controlled shaft 27 to rotate.

[0045] That is, after the user pushes the controlled shaft 27 inward (to the left), the positioning plate 28 on the controlled shaft 27 will be stuck in the annular groove on the left and can rotate. At this time, the second bevel gear is meshed with the first bevel gear, and the user can rotate the controlled shaft 27 and drive the drive shaft 25 to rotate through the first bevel gear and the second bevel gear, thereby driving the reciprocating screw 22 to rotate. When the reciprocating screw 22 rotates, it will drive the lifting plate 23 and the sampler thereon to lift and lower reciprocate.

[0046] Correspondingly, when the user pulls the controlled shaft 27 outward (to the right) and causes the positioning plate 28 to be embedded in the annular groove on the right side, the first bevel gear no longer meshes with the second bevel gear, and at this time the reciprocating screw 22 no longer rotates.

[0047] In the second embodiment of the visual oil tank cleaning cover, in order to prevent light from directly shining into the oil tank through the inner viewing groove 12 and accelerating the deterioration of the oil, a shading plate 51 is also included. The shading plate 51 and the inner viewing groove 12 are both fan-shaped, and a driving plate 52 is provided on the inner curved surface of the shading plate 51. The driving plate 52 is sleeved outside the controlled shaft 27 and can be connected to the controlled shaft 27.

[0048] There is a certain friction between the shading plate 51 and the side surface of the cover body 11 to prevent the shading plate 51 from rotating and falling under the action of gravity.

[0049] In addition, a control disk 53 is fixedly provided on the controlled shaft 27, and the control disk 53 is located between the driving plate 52 and the second bevel gear. With the axis of the controlled shaft 27 as the center, a plurality of friction ridges are provided at equal angles on the side surface of the control disk 53 close to the driving plate 52, and a plurality of friction grooves are provided at equal angles on the side surface of the driving plate 52.

[0050] In this arrangement, when the user pulls the controlled shaft 27 outward (to the right) and causes the positioning plate 28 to be embedded in the annular groove on the right side and causes the number one bevel gear to not mesh with the number two bevel gear, the control disk 53 is attached to the driving plate 52. At this time, the user can control the angle of the shading plate 51 by rotating the controlled shaft 27, and the shading plate 51 can completely cover the inner viewing groove 12.

[0051] A plurality of straight slide grooves are provided in the lower side surface of the lifting plate 23, a slide bar 34 inserted into the straight slide groove is provided on the upper side surface of the shell 31, and the slide bar 34 is connected to the bottom surface of the lifting plate 23 through a No. 2 spring, and the sampling mechanism also includes a No. 1 rack 35 provided on the lower side surface of the lifting plate 23, and the No. 1 rack 35 extends into the shell 31, and two transmission shafts 36 distributed up and down are rotatably connected to the inner wall of the shell 31, and the two transmission shafts 36 are connected by a No. 2 synchronous belt, and the end of the transmission shaft 36 located on the upper side is equipped with a No. 1 spur gear meshing with the No. 1 rack 35, the rotating shaft 32 is vertically arranged, and the transmission shaft 36 located on the lower side is connected to the rotating shaft 32 through a bevel gear set 37.

[0052] When the lifting plate 23 moves downward and the lower edges of the shell 31 and the scraper 33 abut against the bottom wall of the oil tank, if the lifting plate 23 continues to descend, the No. 1 rack 35 will go deeper into the shell 31. During this process, the No. 1 rack 35 will drive the rotating shaft 32 and the scraper 33 to rotate through the transmission shaft 36 and the bevel gear set 37. When the scraper 33 rotates, the dirt on the bottom wall inside the oil tank will be scraped to the lateral extension part of the scraper 33.

[0053] In the third embodiment of the visual oil tank cleaning cover, in order to avoid disturbing the oil during the upward movement of the shell 31 and causing the dirt on the scraper 33 to be carried away, resulting in distortion of subsequent observation results of the staff, a closing mechanism is also included, the closing mechanism includes a bracket slidably connected to the front and rear sides of the shell 31, and the ends of the brackets are connected together with a horizontal plate 38, a lifting groove is provided in the lower side of the horizontal plate 38, and a vertical plate 39 that cannot be separated from the lifting groove and extends to the lower side of the horizontal plate 38 is slidably connected in the lifting groove, and the bottom of the vertical plate 39 is integrally formed with a shielding plate 40, the shielding plate 40 can abut the bottom of the shell 31 and close the scraper 33, the closing mechanism is provided with two groups distributed front and back, and the shielding plates 40 in the two closing mechanisms can abut each other.

[0054] In addition, a circular groove is provided in the transverse plate 38, an internal threaded shaft 41 is rotatably connected in the circular groove, and a push rod 42 is connected in the circular groove for left and right sliding, the push rod 42 is threadedly connected to the internal threaded shaft 41, and the transverse plate 38 is also connected to the side of the outer shell 31 through a No. 3 spring, the No. 3 spring is offset from the circular groove front and back, a No. 2 spur gear is installed on the internal threaded shaft 41, and a No. 2 rack 43 is connected in the transverse plate 38 for up and down sliding, and the No. 2 rack 43 is meshed with the No. 2 spur gear.

[0055] Operation process:

[0056] After the present invention is installed on the oil tank, when the staff needs to observe the oil in the oil tank through the inner viewing groove 12, the staff can rotate the controlled shaft 27 after pulling the controlled shaft 27 outward. At this time, the controlled shaft 27 can drive the shading plate 51 to rotate, and the staff can rotate the shading plate 51 to the lowermost side and observe the inside of the oil tank through the acrylic plate.

[0057] If the staff needs to inspect the bottom wall of the oil tank, the staff will push the controlled shaft 27 inwards so that the first bevel gear and the second bevel gear are meshed and drive the controlled shaft 27 to rotate. In the process of the lifting plate 23 controlling the downward movement of the sampler, the second rack 43 will first abut against the bottom wall of the oil tank. At this time, as the lifting plate 23 continues to descend, the second rack 43 will move upward relative to the cross plate 38. At this time, the internal threaded shaft 41 will rotate and make the push rod 42 slide relative to the cross plate 38. At this time, the push rod 42 will abut against the shell 31 and make the cross plate 38 move away from the shell 31. After the vertical plate shielding plate 40 is not on the lower side of the shell 31, as the lifting plate 23 continues to move downward, the shielding plate 40 will abut against the bottom wall of the oil tank and then move upward relative to the cross plate 38 to avoid interfering with the scraper 33 touching the bottom.

[0058] When the lower edges of the outer shell 31 and the scraper 33 abut against the bottom wall of the oil tank, the lifting plate 23 continues to descend, and then the No. 1 rack 35 descends relative to the outer shell 31 and drives the rotating shaft 32 and the scraper 33 to rotate. During this process, the scraper 33 can scrape off and support the oil stains on the bottom wall of the oil tank.

[0059] After the lifting plate 23 moves to the lowest side, it will reset upward under the action of the reciprocating screw 22. During this process, the rotating shaft 32 and the scraper 33 are reversed, and the distance between the lifting plate 23 and the shell 31 becomes larger. After the shell 31 and the scraper 33 are separated from the bottom surface of the oil tank, the vertical plate 39 will descend relative to the horizontal plate 38, and the shielding plate 40 will be relocated to the lower side of the shell 31. After that, when the lifting plate 23 continues to rise, the second rack 43 will move downward relative to the horizontal plate 38 under the action of gravity, and the push rod 42 will retract into the internal threaded shaft 41, and the horizontal plate 38 will be laterally close to the shell 31. In order to prevent the third spring from interfering with the descent of the second rack 43, a counterweight block is provided on the second rack 43.

[0060] When the No. 2 rack 43 moves to the lowermost side relative to the cross plate 38, the two shielding plates 40 abut against each other and seal the outer shell 31 and the scraper 33 to prevent the outer shell 31 from disturbing the oil in the oil tank during the upward movement, so that the dirt on the scraper 33 is broken up, and the No. 1 rack 35 is a cylindrical rack to prevent the oil from disturbing the dirt on the scraper 33 through the holes between the No. 1 rack 35 and the outer shell 31.

[0061] In the process of the upward movement of the lifting plate 23, in order to prevent the scraper 33 from rotating in the opposite direction so that the dirt on the scraper 33 falls off, a ratchet can be provided on the transmission shaft 36, and the second synchronous belt is sleeved outside the ratchet so that the rotating shaft 32 and the scraper 33 can only rotate in one direction, preventing the scraper 33 from reversing so that the dirt on it falls off. Of course, in an embodiment where the ratchet is not installed, the staff can also make the controlled shaft 27 rotate slowly to prevent the dirt from falling off.

[0062] In addition, it should be noted that the lengths of the reciprocating screw 22 and the through rod 24 need to be set according to the distance from the cover body 11 to the bottom of the oil tank.

[0063] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A visual oil tank cleaning cover, comprising a cover body (11), wherein a plurality of bosses distributed at equal angles are mounted on the outer curved surface of the cover body (11), and mounting holes are arranged in the bosses, characterized in that: An inner viewing groove (12) is provided in the cover body (11), and the inner viewing groove (12) is sealed by a glass plate; A fixing platform (21) is mounted on the left side surface of the cover body (11), and a sampler is connected to the fixing platform (21) via a lifting mechanism; The sampler comprises a housing (31), a rotating shaft (32) and a scraper (33), wherein the rotating shaft (32) is rotatably connected to the housing (31), and the scraper (33) is fixed on the curved surface of the rotating shaft (32), and the lower edge of the scraper (33) is laterally bent, and further comprises a sampling mechanism for controlling the rotation of the scraper (33); The housing (31) is made of a transparent material; It also includes a closing mechanism, the closing mechanism including a bracket slidably connected to the front and rear sides of the shell (31), and the ends of the bracket are connected to a horizontal plate (38), a lifting groove is provided in the lower side of the horizontal plate (38), and a vertical plate (39) is slidably connected in the lifting groove and cannot be separated from the lifting groove and extends to the lower side of the horizontal plate (38), and a shielding plate (40) is integrally formed at the bottom of the vertical plate (39), and the shielding plate (40) can be attached to the bottom of the shell (31); A circular groove is provided in the horizontal plate (38), an internal threaded shaft (41) is rotatably connected in the circular groove, and a push rod (42) is slidably connected in the circular groove, the push rod (42) is threadedly connected to the internal threaded shaft (41), and the horizontal plate (38) is also connected to the side of the housing (31) through a third spring, a second spur gear is installed on the internal threaded shaft (41), and a second rack (43) is slidably connected in the horizontal plate (38), and the second rack (43) is meshed with the second spur gear; The closing mechanism is provided with two groups distributed front and back, and the shielding plates (40) in the two closing mechanisms can abut against each other.

2. The visual fuel tank cleaning cover according to claim 1, characterized in that: The lifting mechanism comprises a reciprocating screw (22) rotatably connected to the lower side of the fixed platform (21), a lifting plate (23) is connected to the reciprocating screw (22), and the sampler is installed on the lifting plate (23), and the lower side of the fixed platform (21) is also provided with a penetrating rod (24) penetrating the lifting plate (23), and also comprises a driving mechanism for driving the reciprocating screw (22) to rotate.

3. The visual fuel tank cleaning cover according to claim 2, characterized in that: The driving mechanism comprises a driving shaft (25) rotatably connected to the lower side of the fixed platform (21), a first bevel gear being mounted on the driving shaft (25), and the driving shaft (25) being connected to the reciprocating screw (22) via a first synchronous belt; A through groove is fixedly provided in the inner viewing groove (12), and a sliding sleeve (26) is fixedly provided in the through groove, two annular grooves distributed left and right are provided in the inner curved surface of the sliding sleeve (26), a controlled shaft (27) is also slidably connected left and right and rotatably connected in the through groove, a mounting groove is provided in the outer curved surface of the controlled shaft (27), and a positioning plate (28) inserted into the annular groove is connected in the mounting groove via a No. 1 spring, and the outer curved surface of the positioning plate (28) and its left and right side surfaces are rounded; The end of the controlled shaft (27) is also provided with a handle, and the left end of the controlled shaft (27) is provided with a second bevel gear capable of meshing with the first bevel gear.

4. The visual fuel tank cleaning cover according to claim 2, characterized in that: A plurality of straight slide grooves are provided in the lower side of the lifting plate (23); a slide bar (34) inserted into the straight slide groove is provided on the upper side of the shell (31); and the slide bar (34) is connected to the bottom surface of the lifting plate (23) via a No. 2 spring; the sampling mechanism comprises a No. 1 rack (35) provided on the lower side of the lifting plate (23); and the No. 1 rack (35) extends into the shell (31); and two transmission shafts (36) distributed up and down are rotatably connected to the inner wall of the shell (31); the two transmission shafts (36) are connected via a No. 2 synchronous belt; and a No. 1 spur gear meshing with the No. 1 rack (35) is provided at the end of the transmission shaft (36) located on the upper side; the rotating shaft (32) is vertically arranged, and the transmission shaft (36) located on the lower side is connected to the rotating shaft (32) via a bevel gear set (37).

5. The visual fuel tank cleaning cover according to claim 4, characterized in that: The first rack (35) is a cylindrical rack.

6. The visual fuel tank cleaning cover according to claim 3, characterized in that: It also comprises a light shielding plate (51), the light shielding plate (51) and the inner viewing groove (12) are both fan-shaped, and a driving plate (52) is provided on the inner curved surface of the light shielding plate (51), the driving plate (52) is sleeved outside the controlled shaft (27) and can be connected to the controlled shaft (27); There is a certain amount of friction between the shading plate (51) and the side surface of the cover body (11).

7. The visual fuel tank cleaning cover according to claim 6, characterized in that: A control disk (53) is fixedly provided on the controlled shaft (27), and the control disk (53) is located between the driving plate (52) and the second bevel gear.

8. The visual fuel tank cleaning cover according to claim 7, characterized in that: With the axis of the controlled shaft (27) as the center, a plurality of friction convex patterns are provided at equal angles on the side surface of the control disk (53) close to the driving plate (52), and a plurality of friction grooves are provided at equal angles on the side surface of the driving plate (52).

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