Sealing device for diesel transport tank

Abstract

The present invention discloses a diesel transport tank sealing device, which relates to the technical field of tank sealing, including a mounting frame, a driving assembly for driving a rotating shaft to rotate is mounted on the supporting frame, a lifting and adjusting assembly for adjusting the vertical movement of a lifting plate is mounted on the mounting frame, an upper concave ring groove for a convex sealing ring to be embedded is provided at the bottom of the sealing column, a pushing assembly for driving the convex sealing ring to move vertically upward is mounted on the connecting pipe, and a locking assembly is mounted between the sealing sliding plate and the extension cylinder. The sealing sliding plate provided by the present invention can move upward after the internal pressure of the diesel transport tank increases, so that the sealing sliding plate can realize the locking block driving the insertion block to be inserted into the inner ring groove by pushing the sliding column, which greatly improves the connection tightness of the extension cylinder, the sealing column and the connecting pipe, effectively avoids the reduction of sealing performance due to the increase of internal pressure of the diesel transport tank, and greatly improves the sealing effect of the diesel transport tank.

Description

Technical Field

[0001] The invention relates to the technical field of tank sealing, in particular to a sealing device for a diesel transport tank. Background Art

[0002] Diesel is a light petroleum product, mainly made from diesel fractions produced by crude oil distillation, catalytic cracking, thermal cracking, hydrocracking, petroleum coking and other processes. It can also be produced by shale oil processing and coal liquefaction. It is widely used in large vehicles, locomotives, and ships. The most important use of diesel is in diesel engines for vehicles and ships.

[0003] The diesel transport tank is used to temporarily store diesel during transportation. During the storage process, the sealing of the transport tank is particularly important. The sealing structure is usually arranged on the connecting pipe connected to the transport tank. The internal sealing of the transport tank is achieved through the sealing column connected to the connecting pipe and the sealing structure between the two. However, the sealing reliability of the existing diesel transport tank sealing device is poor. Especially when the internal temperature of the transport tank increases and the internal pressure increases, the connection tightness of the sealing structure will decrease, resulting in a decrease in sealing performance, which is easy to cause leakage. To this end, a diesel transport tank sealing device is provided to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a diesel transport tank sealing device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A diesel transport tank sealing device comprises a mounting frame, a supporting frame is fixed on the mounting frame, a connecting pipe is fixed on the mounting frame, a locking cylinder integrally formed therewith is connected to the connecting pipe, a sealing column is threadedly connected to the locking cylinder, a vertically arranged rotating shaft is coaxially fixed to the sealing column, a driving component for driving the rotating shaft to rotate is installed on the supporting frame, a lifting plate is arranged above the sealing column, the rotating shaft is rotatably mounted on the lifting plate, a lifting adjustment component for adjusting the vertical movement of the lifting plate is installed on the mounting frame, and a sealing cylinder is provided in the locking cylinder. An accommodating ring cavity is provided in which a convex sealing ring is installed. An upper concave ring groove is provided at the bottom of the sealing column for the convex sealing ring to be embedded in. A pushing assembly for driving the convex sealing ring to move vertically upward is provided on the connecting tube. An extension cylinder extending into the connecting tube is provided at the bottom of the sealing column. A sealing sliding disk is sealingly and slidingly installed in the extension cylinder. A vertical spring is fixed between the sealing sliding disk and the sealing column. A locking assembly is installed between the sealing sliding disk and the extension cylinder. An inner ring groove which is plug-in compatible with the locking assembly is provided inside the connecting tube.

[0007] As an improved solution of the present invention: the driving assembly includes a transmission sleeve rotatably mounted on the support frame, the transmission sleeve is sleeved on the rotating shaft, a transmission bar slidably embedded in the inner wall of the transmission sleeve is fixed on the rotating shaft, a secondary gear is fixedly sleeved on the transmission sleeve, a control motor is installed on the support frame, and the output shaft of the control motor is drivingly connected to a main gear meshing with the secondary gear.

[0008] As an improved solution of the present invention: a sliding ring is circumferentially slidably mounted on the upper end surface of the connecting pipe, and a sealing gasket opposite to the bottom surface of the sealing column is fixed on the top of the sliding ring.

[0009] As an improved solution of the present invention: the locking assembly includes a plurality of locking blocks radially slidably mounted on the extension cylinder, the locking blocks are provided with upwardly disposed wedge surfaces, the locking blocks are fixed with insertion blocks that are plug-fitted into the inner ring groove, and a lateral sealing ring is fixed in the inner ring groove.

[0010] As an improved solution of the present invention: the locking assembly also includes a sliding column fixedly connected to the end of the locking block away from the insertion block, the sliding column is radially slidably installed on the extension cylinder, the upper side wall of the sealing sliding disk is provided with an outer conical surface abutting against the sliding column, and a telescopic spring is fixed between the locking block and the extension cylinder.

[0011] As an improved solution of the present invention: the lifting and adjusting assembly includes a pair of manual frames slidably mounted on the mounting frame, the two manual frames are respectively located on both sides of the connecting pipe, and a pulling rod is hinged between the manual frames and the lifting plate.

[0012] As an improved solution of the present invention: the lifting and adjusting assembly also includes a central gear rotatably mounted on the mounting frame, and racks I and II are respectively meshed and connected on both sides of the central gear, and the racks I and II are respectively fixedly connected to the two manual frames.

[0013] As an improved solution of the present invention: a positioning ring frame is fixedly sleeved on the transmission sleeve, and a plurality of radial columns are radially slidably installed on the positioning ring frame. A triangular block abutting against the side wall of the rotating shaft is fixed on each of the radial columns, a push spring is fixed between the triangular block and the positioning ring frame, and a slot adapted to be engaged with the triangular block is opened on the rotating shaft.

[0014] As an improved solution of the present invention: the pushing assembly includes a plurality of pushing columns vertically slidably mounted on the locking cylinder, the upper end of the pushing column is fixed with an upper pushing ring plate located in the accommodating ring cavity, the convex sealing ring is fixed on the top of the upper pushing ring plate, the lower end of the pushing column extends to the outside of the locking cylinder, and a spring ring sleeved on the pushing column is fixed between the upper pushing ring plate and the locking cylinder.

[0015] As an improved solution of the present invention: the pushing assembly also includes a lifting ring threadedly sleeved on the connecting pipe, the lifting ring vertically corresponds to the pushing column, the outer wall of the lifting ring is fixed with a connecting seat, a connecting column is vertically slidably installed on the connecting seat, a connecting rod is fixed on the connecting column, and the end of the connecting rod away from the connecting seat is hinged on the manual frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The sealing sliding plate provided in the present invention can move upward after the internal pressure of the diesel transport tank increases, so that the sealing sliding plate can realize the locking block driving the extension block to be inserted into the inner ring groove by pushing the sliding column, which greatly improves the connection tightness of the extension cylinder, the sealing column and the connecting pipe, effectively avoids the reduction of sealing performance due to the increase of internal pressure of the diesel transport tank, and greatly improves the sealing effect of the diesel transport tank.

[0018] 2. The sealing column of the present invention is provided so that when it moves vertically downward, it is sealed by abutting against the bottom surface of the sealing column with the help of a sealing gasket. At the same time, under the action of the pushing assembly, the convex sealing ring is pushed upward, and the sealing column moves vertically downward, so that the convex sealing ring can be pressed more tightly into the upper concave ring groove, thereby ensuring the reliability of the sealing column to the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 For the present invention Figure 1 A schematic diagram of the structure from a certain perspective;

[0021] Figure 3 It is a schematic diagram of the connection of the positioning ring frame, the triangular clamping block and the radial column and other components in the present invention;

[0022] Figure 4 It is a structural schematic diagram of the sealing column in the present invention;

[0023] Figure 5 It is a schematic diagram of the internal structure of the connecting pipe in the present invention;

[0024] Figure 6 For the present invention Figure 5 The enlarged schematic diagram of the middle A part;

[0025] Figure 7 It is a schematic diagram of the connection of the locking cylinder, the connecting pipe, the convex sealing ring and the upper push ring plate in the present invention;

[0026] Figure 8 For the present invention Figure 7 The enlarged schematic diagram of the middle part B;

[0027] Fig. 9 It is a schematic diagram of the internal structure of the extension cylinder in the present invention;

[0028] Fig.10 For the present invention Fig. 9 The enlarged schematic diagram of the middle C part;

[0029] Fig.11 It is a schematic diagram of the connection of the mounting frame, lifting collar, lifting adjustment assembly and other components in the present invention.

[0030] In the figure: 1-mounting frame, 2-support frame, 3-control motor, 4-main gear, 5-secondary gear, 6-transmission sleeve, 7-positioning ring frame, 8-transmission bar, 9-rotating shaft, 10-lifting plate, 11-locking cylinder, 12-manual frame, 13-connecting rod, 14-sealing column, 15-lifting sleeve, 16-pulling rod, 17-connecting pipe, 18-slot, 19-radial column, 20-thrust spring, 21-triangular block, 22-upper concave ring groove, 23-extension cylinder, 24-seal Sliding disc, 25-upper push ring plate, 26-convex sealing ring, 27-pushing column, 28-locking block, 29-lateral sealing ring, 30-spring ring, 31-sealing gasket, 32-sliding ring, 33-inner ring groove, 34-accommodating ring cavity, 35-outer cone, 36-rack I, 37-center gear, 38-telescopic spring, 39-sliding column, 40-wedge surface, 41-connecting seat, 42-connecting column, 43-rack II, 44-extending block, 45-vertical spring, 46-push spring. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments: Example

[0032] See also Figure 1-11A diesel transport tank sealing device comprises a mounting frame 1, a support frame 2 is fixed on the mounting frame 1, a connecting pipe 17 is fixed on the mounting frame 1, a locking cylinder 11 integrally formed therewith is connected to the connecting pipe 17, a sealing column 14 is threadedly connected to the locking cylinder 11, a vertically arranged rotating shaft 9 is coaxially fixed to the sealing column 14, a driving component for driving the rotating shaft 9 to rotate is installed on the supporting frame 2, a lifting plate 10 is arranged above the sealing column 14, the rotating shaft 9 is rotatably installed on the lifting plate 10, a lifting adjustment component for adjusting the vertical movement of the lifting plate 10 is installed on the mounting frame 1, and a space for accommodating the locking cylinder 11 is provided in the locking cylinder 11 An annular cavity 34 is provided to accommodate a convex sealing ring 26 installed therein. An upper concave annular groove 22 is provided at the bottom of the sealing column 14 for the convex sealing ring 26 to be embedded in. A pushing assembly for driving the convex sealing ring 26 to move vertically upward is installed on the connecting tube 17. An extension cylinder 23 extending into the connecting tube 17 is provided at the bottom of the sealing column 14. A sealing sliding disk 24 is sealingly and slidingly installed in the extension cylinder 23. A vertical spring 45 is fixed between the sealing sliding disk 24 and the sealing column 14. A locking assembly is installed between the sealing sliding disk 24 and the extension cylinder 23. An inner annular groove 33 is provided inside the connecting tube 17 to be plugged in and adapted to the locking assembly.

[0033] The connecting pipe 17 provided in the present device is welded on the diesel transport tank. The lifting plate 10 is driven by the lifting and adjusting assembly to drive the rotating shaft 9 to move vertically downward, so that the rotating shaft 9 drives the sealing column 14 to move vertically downward and extend into the locking cylinder 11. The rotating shaft 9 is driven to rotate by the driving assembly to drive the rotating shaft 9 to drive the sealing column 14 to rotate downward relative to the locking cylinder 11, so that the sealing column 14 seals the connecting pipe 17.

[0034] Specifically, the driving component of the device includes a transmission sleeve 6 rotatably mounted on the support frame 2, the transmission sleeve 6 is sleeved on the rotating shaft 9, a transmission bar 8 is fixed on the rotating shaft 9 and is slidably embedded in the inner wall of the transmission sleeve 6, a sub-gear 5 is fixedly sleeved on the transmission sleeve 6, a control motor 3 is installed on the support frame 2, and the output shaft of the control motor 3 is drivingly connected to the main gear 4 that meshes with the sub-gear 5.

[0035] The main gear 4 is driven to rotate by controlling the motor 3, and the main gear 4 drives the meshing sub-gear 5 to rotate. At this time, the sub-gear 5 drives the transmission sleeve 6 to rotate, and the transmission sleeve 6 drives the rotating shaft 9 to rotate through the transmission bar 8, thereby realizing that the rotating shaft 9 drives the sealing column 14 to rotate.

[0036] A sliding ring 32 is circumferentially slidably installed on the upper end surface of the connecting tube 17, and a sealing gasket 31 opposite to the bottom surface of the sealing column 14 is fixed on the top of the sliding ring 32. When the sealing column 14 is screwed downward in the locking cylinder 11, the sealing column 14 moves downward and docks with the top of the connecting tube 17. The sealing gasket 31 is installed on the connecting tube 17 and is clamped and fixed between the sealing column 14 and the connecting tube 17, thereby achieving a sealing effect on the connecting tube 17. Under the driving action of the push assembly, the convex sealing ring 26 is embedded in the upper concave annular groove 22 at the bottom of the sealing column 14, achieving a secondary sealing effect on the connecting tube 17, greatly improving the sealing reliability of the connecting tube 17.

[0037] The locking assembly of the device includes a plurality of locking blocks 28 radially slidably mounted on the extension cylinder 23, the locking block 28 is provided with a wedge surface 40 facing upward, the locking block 28 is fixed with an insertion block 44 plug-fitted with the inner ring groove 33, and a lateral sealing ring 29 is fixed in the inner ring groove 33. The locking assembly also includes a sliding column 39 fixedly connected to one end of the locking block 28 away from the insertion block 44, the sliding column 39 is radially slidably mounted on the extension cylinder 23, the upper side wall of the sealing sliding disk 24 is provided with an outer conical surface 35 abutting against the sliding column 39, and a telescopic spring 38 is fixed between the locking block 28 and the extension cylinder 23.

[0038] Based on the above structural setting, when the air pressure inside the diesel transport tank increases, the sealing slide plate 24 is pushed upward. At this time, the sealing slide plate 24 overcomes the elastic force of the vertical spring 45 and moves vertically upward relative to the extension cylinder 23. At this time, the sealing slide plate 24 pushes multiple sliding columns 39 to slide horizontally through the outer cone 35. The sliding columns 39 drive the locking block 28 to slide. The locking block 28 drives the insertion block 44 to overcome the elastic action of the telescopic spring 38 and extend out of the extension cylinder 23 and extend to the inside of the inner ring groove 33. The insertion block 44 is tightly abutted against the lateral sealing ring 29 to achieve further sealing effect, which greatly improves the sealing effect of the connecting pipe 17. At the same time, the connecting pipe 17 and the extension cylinder 23 can be tightly locked, which greatly improves the structural tightness of the sealing device and ensures that the diesel transport tank has reliable sealing performance when the internal air pressure increases. Example

[0039] See also Figure 1-11 On the basis of Example 1, in addition, the lifting and adjusting assembly of the device includes a pair of manual frames 12 slidably mounted on the mounting frame 1, the two manual frames 12 are respectively located on both sides of the connecting pipe 17, and a pulling rod 16 is hinged between the manual frames 12 and the lifting plate 10. The lifting and adjusting assembly also includes a central gear 37 rotatably mounted on the mounting frame 1, and the two sides of the central gear 37 are respectively meshed and connected with a rack I36 and a rack II43, and the rack I36 and the rack II43 are respectively fixedly connected to the two manual frames 12.

[0040] Through the above arrangement, when the rotating shaft 9 is adjusted vertically downward to make the sealing column 14 move down and dock with the locking cylinder 11, one of the manual frames 12 is pulled away from the locking cylinder 11 to slide. At this time, the rack II43 and the rack I36 move toward each other under the meshing action of the center gear 37, that is, the two manual frames 12 move toward each other and drive the lifting plate 10 to move vertically downward through the pulling rod 16. At this time, the rotating shaft 9 drives the sealing column 14 to move vertically downward and dock with the locking cylinder 11 through threads. The above operation greatly improves the convenience of adjusting the position of the sealing column 14, which is beneficial to the stable connection between the sealing column 14 and the locking cylinder 11 to realize reliable sealing of the connecting pipe 17.

[0041] In addition, a positioning ring frame 7 is fixedly sleeved on the transmission sleeve 6, and a plurality of radial columns 19 are radially slidably installed on the positioning ring frame 7. A triangular block 21 abutting against the side wall of the rotating shaft 9 is fixed on each radial column 19, and a push spring 46 is fixed between the triangular block 21 and the positioning ring frame 7. A slot 18 adapted to the triangular block 21 is provided on the rotating shaft 9.

[0042] By pushing the manual frame 12 to slide toward the locking cylinder 11 and adjusting the control motor 3 to reverse, the rotating shaft 9 and the sealing column 14 can be rotated in the opposite direction and moved vertically upward, so that the locking cylinder 11 can be opened. When the rotating shaft 9 moves up to the slot 18 and is horizontally corresponding to the triangular block 21, under the elastic pushing action of the pushing spring 46, the triangular block 21 is inserted into the slot 18, so as to achieve the temporary positioning effect of the rotating shaft 9 and the sealing column 14. At this time, the connecting pipe 17 can be opened for a long time to facilitate the production operation of the diesel transport tank, and the opening and closing operation of the connecting pipe 17 is convenient and fast.

[0043] The push assembly of the device includes a plurality of push columns 27 vertically slidably mounted on the locking cylinder 11, the upper end of the push column 27 is fixed with an upper push ring plate 25 located in the accommodating ring cavity 34, a convex sealing ring 26 is fixed on the top of the upper push ring plate 25, the lower end of the push column 27 extends to the outside of the locking cylinder 11, and a spring ring 30 sleeved on the push column 27 is fixed between the upper push ring plate 25 and the locking cylinder 11. The push assembly also includes a lifting collar 15 threadedly sleeved on the connecting pipe 17, the lifting collar 15 vertically corresponds to the push column 27, the outer wall of the lifting collar 15 is fixed with a connecting seat 41, a connecting column 42 is vertically slidably mounted on the connecting seat 41, a connecting rod 13 is fixed on the connecting column 42, and the end of the connecting rod 13 away from the connecting seat 41 is hinged on the manual frame 12.

[0044] Through the above arrangement, when the two manual frames 12 slide away from the connecting tube 17, the sealing column 14 moves vertically downward, and one of the manual frames 12 drives the connecting seat 41 and the lifting ring 15 to rotate through the connecting rod 13, and the lifting ring 15 moves vertically upward relative to the connecting tube 17, so that the lifting ring 15 pushes multiple pushing columns 27 to move vertically upward. At this time, the upper push ring plate 25 moves upward and drives the convex sealing ring 26 to move upward and embed into the upper concave ring groove 22, thereby realizing the opposite movement and extrusion sealing of the sealing column 14 and the convex sealing ring 26, which greatly improves the sealing effect on the connecting tube 17.

[0045] In summary, the sealing slide plate 24 provided by the present invention can move upward after the internal pressure of the diesel transport tank increases, so that the sealing slide plate 24 can realize the locking block 28 and drive the insertion block 44 to be inserted into the inner ring groove 33 by pushing the sliding column 39, which greatly improves the connection tightness of the extension cylinder 23, the sealing column 14 and the connecting pipe 17, effectively avoids the reduction of the sealing performance due to the increase of the internal pressure of the diesel transport tank, and greatly improves the sealing effect of the diesel transport tank. The sealing column 14 provided by the present invention is sealed by the sealing gasket 31 when it moves vertically downward, and at the same time, under the action of the pushing assembly, the convex sealing ring 26 is pushed upward, and the sealing column 14 moves vertically downward, so that the convex sealing ring 26 can be pressed more tightly into the upper concave ring groove 22, ensuring the reliability of the sealing column 14 to seal the connecting pipe 17.

[0046] It should be noted that although this specification is described according to the implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art. The above embodiments only express the preferred implementation methods of the technical solution, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention of the technical solution. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several variations, improvements and substitutions can be made, which all belong to the protection scope of the present technical solution. The protection scope of the invention of the present technical solution shall be based on the attached claims.

Claims

1. A diesel transport tank sealing device, comprising a mounting frame (1), a support frame (2) being fixed on the mounting frame (1), a connecting pipe (17) being fixed on the mounting frame (1), a locking cylinder (11) being connected to the connecting pipe (17) and being integrally formed therewith, a sealing column (14) being threadedly connected to the locking cylinder (11), characterized in that: A vertically arranged rotating shaft (9) is coaxially fixed on the sealing column (14); a driving assembly for driving the rotating shaft (9) to rotate is installed on the supporting frame (2); a lifting plate (10) is arranged above the sealing column (14); the rotating shaft (9) is rotatably mounted on the lifting plate (10); a lifting adjustment assembly for adjusting the vertical movement of the lifting plate (10) is installed on the mounting frame (1); a receiving annular cavity (34) is provided in the locking cylinder (11); and a receiving annular cavity (34) is provided in the receiving annular cavity (34). A convex sealing ring (26) is installed, the bottom of the sealing column (14) is provided with an upper concave annular groove (22) for the convex sealing ring (26) to be embedded, a push assembly for driving the convex sealing ring (26) to move vertically upward is installed on the connecting pipe (17), the bottom of the sealing column (14) is provided with an extension cylinder (23) extending into the connecting pipe (17), a sealing sliding disc (24) is sealingly slidably installed in the extension cylinder (23), and the sealing sliding disc (24) and the sealing column (14) are connected to each other. ), a vertical spring (45) is fixed between the sealing sliding disc (24) and the extension cylinder (23), a locking assembly is installed between the sealing sliding disc (24) and the extension cylinder (23), an inner ring groove (33) is provided inside the connecting pipe (17) and is plugged and matched with the locking assembly, and the locking assembly includes a plurality of locking blocks (28) radially slidably installed on the extension cylinder (23), the locking block (28) is provided with a wedge surface (40) arranged upward, and an insertion block (40) plugged and matched with the inner ring groove (33) is fixed on the locking block (28) (44), a lateral sealing ring (29) is fixed in the inner ring groove (33), the locking assembly also includes a sliding column (39) fixedly connected to one end of the locking block (28) away from the insertion block (44), the sliding column (39) is radially slidably installed on the extension cylinder (23), the upper side wall of the sealing sliding disk (24) is provided with an outer conical surface (35) abutting against the sliding column (39), and a telescopic spring (38) is fixed between the locking block (28) and the extension cylinder (23).

2. A diesel transport tank sealing device according to claim 1, characterized in that: The driving assembly comprises a transmission sleeve (6) rotatably mounted on the support frame (2), the transmission sleeve (6) being sleeved on a rotating shaft (9), a transmission bar (8) being fixed on the rotating shaft (9) and being slidably embedded in the inner wall of the transmission sleeve (6), a sub-gear (5) being fixedly sleeved on the transmission sleeve (6), a control motor (3) being mounted on the support frame (2), and an output shaft of the control motor (3) being drivingly connected to a main gear (4) meshing with the sub-gear (5).

3. A diesel transport tank sealing device according to claim 1, characterized in that: A sliding ring (32) is circumferentially slidably mounted on the upper end surface of the connecting pipe (17), and a sealing gasket (31) opposite to the bottom surface of the sealing column (14) is fixed on the top of the sliding ring (32).

4. A diesel transport tank sealing device according to claim 1, characterized in that: The lifting and adjusting assembly comprises a pair of manual frames (12) slidably mounted on the mounting frame (1), the two manual frames (12) being respectively located on both sides of a connecting pipe (17), and a pulling rod (16) being hinged between the manual frames (12) and the lifting plate (10).

5. A diesel transport tank sealing device according to claim 4, characterized in that: The lifting and adjusting assembly also includes a central gear (37) rotatably mounted on the mounting frame (1), and two sides of the central gear (37) are respectively meshedly connected with a rack I (36) and a rack II (43), and the rack I (36) and the rack II (43) are respectively fixedly connected to the two manual frames (12).

6. A diesel transport tank sealing device according to claim 2, characterized in that: A positioning ring frame (7) is fixedly sleeved on the transmission sleeve (6), and a plurality of radial columns (19) are radially slidably mounted on the positioning ring frame (7). A triangular clamping block (21) abutting against the side wall of the rotating shaft (9) is fixed on each of the radial columns (19), and a push spring (46) is fixed between the triangular clamping block (21) and the positioning ring frame (7). A clamping groove (18) adapted to be clamped with the triangular clamping block (21) is provided on the rotating shaft (9).

7. A diesel transport tank sealing device according to claim 4, characterized in that: The pushing assembly includes a plurality of pushing columns (27) vertically slidably mounted on the locking cylinder (11); an upper pushing ring plate (25) located in the accommodating ring cavity (34) is fixed to the upper end of the pushing column (27); the convex sealing ring (26) is fixed to the top of the upper pushing ring plate (25); the lower end of the pushing column (27) extends to the outside of the locking cylinder (11); and a spring ring (30) sleeved on the pushing column (27) is fixed between the upper pushing ring plate (25) and the locking cylinder (11).

8. A diesel transport tank sealing device according to claim 7, characterized in that: The pushing assembly also includes a lifting ring (15) threadedly sleeved on the connecting pipe (17), the lifting ring (15) vertically corresponding to the pushing column (27), a connecting seat (41) is fixed on the outer wall of the lifting ring (15), a connecting column (42) is vertically slidably mounted on the connecting seat (41), a connecting rod (13) is fixed on the connecting column (42), and one end of the connecting rod (13) away from the connecting seat (41) is hinged on the manual frame (12).

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