Tank truck internal cleaning device

Abstract

The present invention belongs to the field of special operation vehicle equipment, and specifically relates to a cleaning device inside the tank body of an oil tanker. The specific technical solution is as follows: The connection assembly includes a first connecting rod that is vertically telescopic and has one end connected to the water pump system. The other end of the first connecting rod is provided with a second connecting rod that is horizontally telescopic. Both the first connecting rod and the second connecting rod are controlled by a hydraulic system for telescoping. Both the first connecting rod and the second connecting rod are hollow rods for conveying cleaning liquid. Along the length direction of the first connecting rod, there is a circular first channel connected to the hydraulic system. Along the length direction of the second connecting rod, there is a circular second channel communicated with the first channel. A control assembly is arranged at the port of the first channel far from the second channel. The control assembly controls the telescoping of the second connecting rod according to the magnitude of the liquid pressure. The cleaning assembly can be fixed at different positions of the tank body as needed, so as to clean the inner wall of the tank as comprehensively as possible.

Description

Technical Field

[0001] The present invention belongs to the field of special operation vehicle equipment, and particularly relates to a cleaning device for the interior of an oil tanker tank body. Background Art

[0002] Oil tankers are usually used to store and transport various oil products. After long-term use, impurities are likely to accumulate inside the tank, affecting the quality of the oil products in the tank. Therefore, it is necessary to regularly clean the oil tanker. Currently, the main method for cleaning the inner wall of an oil tanker is to first drain the remaining oil products in the tank through the oil port and ventilate the tank to ensure that the oil and gas concentration in the tank is within a safe range. Then, the operator enters the tank through the manhole at the top of the oil tank and flushes the oil stains and sediment with high-pressure water. However, this cleaning method has low work efficiency; the space inside the tank body is relatively enclosed and there are harmful gases to the human body in the tank, so there are great safety hazards during manual operation. The operator needs to work at a high temperature of 40 - 50°C and call out every two minutes to confirm safety.

[0003] Therefore, if a cleaning device for the interior of an oil tanker tank body that does not require the operator to enter the tank body for cleaning can be provided, it will have excellent industrial application prospects. Summary of the Invention

[0004] To solve the technical problems in the background art, the present invention provides a cleaning device for the interior of an oil tanker tank body.

[0005] To achieve the above invention purpose, the technical solution adopted by the present invention is: a cleaning device for the interior of an oil tanker tank body, including a connection component. One end of the connection component is provided with a water pump system, and the other end is provided with a cleaning component. The connection component includes a first connecting rod that is vertically telescopic and is connected to the water pump system at one end. The other end of the first connecting rod is provided with a second connecting rod that is horizontally telescopic. Both the first connecting rod and the second connecting rod are controlled to expand and contract by a hydraulic system. Both the first connecting rod and the second connecting rod are hollow rods for transporting cleaning liquid. Along the length direction of the first connecting rod, there is a circular first channel connected to the hydraulic system. Along the length direction of the second connecting rod, there is a circular second channel communicating with the first channel. The port of the first channel far from the second channel is provided with a control component, and the control component controls the expansion and contraction of the second connecting rod according to the liquid pressure.

[0006] Preferably, the first link rod includes a first vertical rod. An annular first vertical channel is arranged along the length direction inside the first vertical rod. The top of the first vertical channel is connected to a hydraulic system. A second vertical rod is slidably arranged inside the first vertical channel. A second spring is arranged inside the first vertical channel and above the second vertical rod. The upper end of the second spring is connected to the inner top of the first vertical channel, and its lower end is connected to the top end of the second vertical rod. A first sliding groove is arranged on the inner side wall of the first vertical channel. A first sliding block is arranged at the upper end of the second vertical rod. The first channel is arranged on the second vertical rod.

[0007] Preferably, a first groove is arranged on the first sliding block. The control assembly includes a first support plate arranged in the first groove. A turning plate is hinged to the upper end of the first support plate. The first support plate divides the turning plate into a control part and a shielding part. The length of the control part is greater than that of the shielding part. A first spring is arranged in the first groove. The other end of the first spring is connected to the bottom of the control part of the turning plate.

[0008] When the control assembly controls the first channel to close, the first spring is in a compressed state. The turning plate is in a horizontal state. The shielding part of the turning plate shields the first channel, blocking the first channel and the first vertical channel.

[0009] Preferably, the cross-sectional shape of the first channel is circular. The control assembly includes three shielding parts. When the three shielding parts are in a horizontal state, they shield the first channel. A limiting rod is arranged inside the first groove. Through holes corresponding to the first channel are arranged along the length direction of the limiting rod.

[0010] Preferably, the second link rod includes a first horizontal rod connected to the bottom of the second vertical rod. The second channel is arranged on the first horizontal rod. A second horizontal rod is slidably arranged inside the second channel. A second sliding groove is arranged on the inner side wall of the second channel. A second sliding block is arranged at one end of the second horizontal rod close to the first channel.

[0011] Preferably, a steel wire is arranged at one end of the second horizontal rod close to the first channel. The steel wire is arranged along the second channel, the first channel, and the first vertical channel, and extends out of the first link rod and is connected to a motor. The steel wire pulls the second horizontal rod to slide inside the second channel, and the second link rod contracts.

[0012] Preferably, the cleaning assembly includes a hollow third link rod. The third link rod is connected to the end of the second horizontal rod far from the first link rod. A plurality of high-pressure spray nozzles are arranged at an angle on the circumferential side wall of the third link rod, and a plurality of high-pressure spray nozzles are arranged at its end far from the second horizontal rod.

[0013] Preferably, a fixing component detachably connected to the manhole is provided at the upper end of the connecting component. The fixing component includes a first fixing cylinder. A second fixing cylinder is slidably arranged on the periphery of the first fixing cylinder along its axial direction. A first through hole is arranged along the axial direction of the second fixing cylinder. An even number of second through holes are evenly distributed on the inner side wall of the second fixing cylinder perpendicular to its axial direction. A fixing block is slidably arranged in the second through hole. The inner side wall of the fixing block close to the first fixing cylinder is an inclined surface. During operation, the bottom of the first fixing cylinder presses against the inclined surface, and the outer side wall of the fixing block abuts against the inner side wall of the manhole.

[0014] Preferably, a baffle is arranged on the outer side wall of the fixing block, and the bottom of the baffle contacts the top of the manhole. A third through hole is arranged along the axial direction of the first fixing cylinder, and a first connecting rod passes through the third through hole and is threadedly connected to the first fixing cylinder.

[0015] Preferably, a third spring is arranged in the second through hole. One end of the third spring is fixedly connected to one end of the second through hole close to the baffle, and the other end is fixedly connected to one end of the fixing block close to the inclined surface.

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

[0017] 1. By providing a vertically telescopic first connecting rod, one end of the first connecting rod is connected to the water pump system, and the other end is connected to the second connecting rod. The second connecting rod can be telescopically extended horizontally. Both the first connecting rod and the second connecting rod are controlled to extend and retract by a hydraulic system and are both hollow rods. Their flow through holes are used to transport the cleaning liquid. A circular first channel is arranged on the first connecting rod, and a circular second channel is arranged on the second connecting rod. The communication / blocking between the first channel, the second channel and the hydraulic system is realized through a control component. The control component controls the opening and closing of the first channel according to the magnitude of the liquid pressure. By extending and retracting the first connecting rod, the position of the cleaning component in the vertical direction inside the tank can be changed. By extending and retracting the second connecting rod, the position of the cleaning component in the horizontal direction inside the tank can be changed. The cleaning component can be fixed at different positions in the tank as needed, so as to clean the inner wall of the tank as comprehensively as possible.

[0018] The present invention designs the cleaning liquid delivery pipe in a telescopic form, and realizes the telescoping of the cleaning liquid delivery pipe through a hydraulic drive method, replacing the existing electric drive method. It is not necessary to simultaneously set an electric telescopic rod and a telescopic cleaning liquid delivery pipe that extend synchronously. Only the cleaning liquid delivery pipe needs to be set, which not only simplifies the mechanical structure of the telescopic cleaning liquid delivery pipe, but also avoids safety accidents caused by electric leakage due to hydraulic drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic cross-sectional view of the overall structure of the internal cleaning device of the tank body of the present invention;

[0020] Figure 2 is Figure 1 A partial structure enlarged schematic diagram in

[0021] Figure 3 is Figure 1 B-B cross-sectional view schematic diagram in

[0022] Figure 4 is Figure 1 C partial structure enlarged schematic diagram in

[0023] Figure 5 is Figure 4 D-D cross-sectional view schematic diagram in

[0024] Figure 6 is the overall structure cross-sectional view schematic diagram of the fixing component of the present invention (the third spring is not shown in the figure);

[0025] Figure 7 is the top view schematic diagram of the fixing component of the present invention.

[0026] In the figure: the first vertical rod 1, the second vertical rod 2, the first channel 3, the first vertical channel 4, the first chute 5, the flow through hole 6, the second horizontal rod 7, the first horizontal rod 8, the second channel 9, the second slider 10, the second chute 11, the third connecting rod 12, the tank body 13, the manhole 14, the baffle 15, the fixing block 16, the second through hole 17, the first fixing cylinder 18, the handle 19, the external thread connecting head 20, the second fixing cylinder 21, the steel wire 22, the third through hole 23, the high-pressure nozzle 24, the first support plate 25, the first spring 26, the control part 27, the limiting rod 28, the shielding part 29, the first groove 30, the first slider 31, the limiting block 32, the fixed pulley 33, the second spring 34, the wire wheel 35. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. If not specifically specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0029] Such as Figures 1-7As shown in the figure, the present invention discloses an internal cleaning device for the tank body 13 of an oil tanker, which includes a connection component, a fixing component, and a cleaning component. The cleaning component is connected to the fixing component through the connection component, and the cleaning component is fixed at the manhole 14 of the oil tanker by setting the fixing component. One end of the connection component is connected to the water pump system, and the other end is provided with a cleaning component. The water pump system transports the cleaning liquid to the cleaning component through the connection component, and the cleaning component is used to clean the inner wall of the tank body 13 of the oil tanker. The connection component includes a first connecting rod that is vertically telescopic and connected to the water pump system at one end. Two sets of horizontally telescopic second connecting rods are provided at the other end of the first connecting rod. The first connecting rod and the second connecting rod are both controlled by a hydraulic system to expand and contract. The first connecting rod and the second connecting rod are both hollow rods, that is, the first connecting rod and the second connecting rod are both provided with a flow through hole 6 along their axial directions, and the flow through hole 6 is used to transport the cleaning liquid. An annular first channel 3 connected to the hydraulic system is provided on the side wall of the first connecting rod along its length direction. An annular second channel 9 communicating with the first channel 3 is provided on the side wall of the second connecting rod along its length direction. A control component is provided at the port of the first channel 3 far from the second channel 9, and the control component controls the expansion and contraction of the second connecting rod according to the liquid pressure.

[0030] During installation, the upper end of the first connecting rod is fixed at the manhole 14 through the fixing component. The second connecting rod can be parallel to the length direction and the width direction of the tank body 13, preferably parallel to the length direction of the tank body 13. The first connecting rod and the second connecting rod are perpendicularly arranged. By expanding and contracting the first connecting rod, the position of the cleaning component in the vertical direction inside the tank body 13 can be changed. By expanding and contracting the second connecting rod, the position of the cleaning component in the horizontal direction inside the tank body 13 can be changed. The cleaning component can be fixed at different positions of the tank body 13 according to needs, so as to clean the inner wall of the tank body 13 as comprehensively as possible.

[0031] It should be noted that the water pump system is a prior art, including a first liquid storage tank for storing cleaning liquid and a high-pressure water pump. The high-pressure water pump is connected to the first liquid storage tank through a high-pressure water pipe. At the same time, the high-pressure water pump is connected to the first connecting rod through a high-pressure water pipe. The hydraulic system is a prior art, including a second liquid storage tank for storing liquid, an infusion pump, and a liquid discharge pump. The infusion pump and the liquid discharge pump are connected to the second liquid storage tank through a liquid pipe. At the same time, the infusion pump and the liquid discharge pump are connected to the first connecting rod through a liquid pipe. It can be understood that there are two parallel pipelines arranged between the second liquid storage tank and the first connecting rod. One is used to transport the liquid in the second liquid storage tank into the first connecting rod to control the elongation of the first connecting rod; the other is used to extract the liquid in the first connecting rod into the second liquid storage tank to control the contraction of the first connecting rod. The connection methods of the high-pressure water pipe and the liquid pipe to the first connecting rod can be threaded connection or flange connection, and threaded connection is preferred. Specifically, an external thread connecting head 20 communicating with the first channel 3 is provided at the top of the first connecting rod, and the liquid pipe is threadedly connected to the first connecting rod through the external thread connecting head. Internal thread connecting heads are provided on the inner wall of the top of the first connecting rod and the flow through hole 6, and the high-pressure water pipe is threadedly connected to the first connecting rod through the internal thread connecting head.

[0032] Furthermore, the first connecting rod includes a first vertical rod 1. An annular first vertical channel 4 with an open lower end is arranged along the length direction of the first vertical rod 1. An external thread connecting head is provided at the top of the first vertical channel 4, and the rest is closed. The top of the first vertical channel 4 is connected to the hydraulic system through the external thread connecting head. A second vertical rod 2 is slidably arranged in the first vertical channel 4. A first sliding groove 5 is arranged on the inner side wall of the first vertical channel 4. A first sliding block 31 is provided at the upper end of the second vertical rod 2. The movement of the first sliding block 31 in the first sliding groove 5 is equivalent to the movement of a piston block in a piston cylinder, that is, the liquid above the first sliding block 31 in the first vertical channel 4 will not flow into the lower part of the first sliding block 31. The first channel 3 is arranged on the second vertical rod 2 and has openings at both its upper and lower ends. A second spring 34 is arranged above the second vertical rod 2 in the first vertical channel 4. The upper end of the second spring 34 is connected to the inner top of the first vertical channel 4, and its lower end is connected to the top end of the second vertical rod 2. When the first connecting rod is in the shortest state, the second spring 34 is in a natural state; when the second vertical rod 2 slides downward in the first vertical rod 1, the first connecting rod elongates, and the second spring 34 is in a stretched state; under the stretching action of the second spring 34, the second vertical rod 2 slides upward in the first vertical rod 1, the first connecting rod contracts, and the liquid discharge pump works to discharge the liquid in the first vertical channel 4 into the second liquid storage tank.

[0033] The implementation manner of the control component is as follows: Figure 4 、 5As shown, a first groove 30 is provided on the first slider 31. The control assembly includes a first support plate 25 disposed in the first groove 30. A turning plate is hinged to the upper end of the first support plate 25. The first support plate 25 divides the turning plate into a control portion 27 and a shielding portion 29. The length of the control portion 27 is greater than the length of the shielding portion 29. The distance from the end of the control portion 27 facing the first support plate 25 to the first support plate 25 is L1, and the distance from the end of the shielding portion 29 facing the first support plate 25 to the first support plate 25 is L2, where L1 > L2. The structure of the turning plate on the first support plate 25 is equivalent to a lever structure. A first spring 26 is disposed in the first groove 30. One end of the first spring 26 is fixedly connected to the inner bottom of the first groove 30, and the other end is fixedly connected to the bottom of the control portion 27 of the turning plate.

[0034] When the control assembly controls the first channel 3 to close, the first spring 26 is in a compressed state. The turning plate is in a horizontal state, and the shielding portion 29 of the turning plate shields the first channel 3, blocking the first channel 3 and the first vertical channel 4. When the control assembly controls the first channel 3 to open, under the action of the liquid, the control portion 27 falls into the first groove 30, and the first spring 26 continues to be compressed. The turning plate is in a state inclined toward the first groove 30, and the shielding portion 29 of the turning plate opens, connecting the first channel 3 and the first vertical channel 4.

[0035] In a further technical solution, the cross-sectional shape of the first channel 3 is circular. The control assembly includes three shielding portions 29, and the three shielding portions 29 form a circular plate, which shields the first channel 3 in the horizontal state. A cylindrical limiting rod 28 is disposed inside the first groove 30, and through holes corresponding to the first channel 3 are provided along the length direction of the limiting rod 28.

[0036] Further, the second connecting rod includes a first cross bar 8 connected to the bottom of the second vertical rod 2. The second channel 9 is provided on the first cross bar 8. A second cross bar 7 is slidably disposed in the second channel 9. A second chute 11 is provided on the inner side wall of the first horizontal channel. A second slider 10 is provided at one end of the second cross bar 7 close to the first channel 3. The movement of the second slider 10 in the second chute 11 is equivalent to the movement of a piston block in a piston cylinder. Limit blocks 32 are provided at the bottom end of the first vertical channel 4 and at one end of the second channel 9 away from the first channel 3 to prevent the second vertical rod 2 from sliding out of the first vertical rod 1 and the second cross bar 7 from sliding out of the first cross bar 8.

[0037] Further, a steel wire 22 is provided at one end of the second cross bar 7 close to the first channel 3. The steel wire 22 is arranged along the second channel 9 and the first channel 3, and simultaneously passes through the first slider 31 to enter the first vertical channel 4, and extends out of the top of the first connecting rod to be connected to the motor. The steel wire 22 pulls the second cross bar 7 to slide in the second channel 9, and the second connecting rod contracts. In order to better tension the steel wire 22, fixed pulleys 33 are provided at the bottom inside the first channel 3 and the outer top of the first connecting rod. The output end of the motor is connected to a wire wheel 35, and the other end of the steel wire 22 is connected to the wire wheel 35. The motor rotates forward and backward to realize the winding and unwinding of the steel wire 22.

[0038] Further, as Figure 3 shown, the cleaning assembly includes a hollow third connecting rod 12. The third connecting rod 12 is provided with a flow through hole 6 along its axial direction. The third connecting rod 12 is connected to one end of the second cross bar 7 away from the first connecting rod. A plurality of high-pressure nozzles 24 are arranged at an angle on the circumferential side wall of the third connecting rod 12, and a plurality of high-pressure nozzles 24 are arranged at the end of the third connecting rod 12 away from the second cross bar 7.

[0039] Further, as Figure 6 、 7 shown, a fixing assembly detachably connected to the manhole 14 is provided at the upper end of the connecting assembly. The fixing assembly includes a first fixing cylinder 18. A second fixing cylinder 21 is slidably arranged along the axial direction of the outer periphery of the first fixing cylinder 18. The second fixing cylinder 21 is provided with a first through hole along its axial direction. An even number of second through holes 17 are arranged on the inner side wall of the fixing cylinder perpendicular to its axial direction. A fixing block 16 is slidably arranged in the second through hole 17. The inner side wall of the fixing block 16 close to the first fixing cylinder 18 is an inclined surface; during operation, the bottom of the first fixing cylinder 18 presses the inclined surface to make the outer side wall of the fixing block 16 abut against the inner side wall of the manhole 14. A handle 19 is arranged on the outer side wall of the first fixing cylinder 18 and close to its top end.

[0040] Further, a baffle 15 is arranged on the outer side wall of the fixing block 16. The bottom of the baffle 15 contacts the top of the manhole 14; the first fixing cylinder 18 is provided with a third through hole 23 along its axial direction, and the first connecting rod passes through the third through hole 23 and is threadedly connected to the first fixing cylinder 18.

[0041] Further, a third spring is arranged in the second through hole 17. One end of the third spring is fixedly connected to one end of the second through hole 17 close to the baffle 15, and the other end is fixedly connected to one end of the fixing block 16 close to the inclined surface.

[0042] Specifically, assume that the critical liquid pressure for the control component to control the opening and closing of the first channel 3 is 0.6 MPa. During the process of controlling the first link and the second link to extend: the infusion pipeline provided with an infusion pump works, and the drainage pipeline provided with a drainage pump is closed. First, control the liquid pressure to be lower than 0.6 MPa, and the control component controls the first channel 3 to close. The hydraulic system injects liquid into the first link to control the first link to extend. Then control the liquid pressure to be greater than or equal to 0.6 MPa, and the control component controls the first channel 3 to open. The hydraulic system injects liquid into the first link and into the second link to control the second link to extend. The adjustment process is to first control the first link to extend and then control the second link to extend.

[0043] During the process of controlling the first link and the second link to contract: the infusion pipeline provided with an infusion pump is closed, and the drainage pipeline provided with a drainage pump works. First, control the liquid pressure to be greater than or equal to 0.6 MPa, and the control component controls the first channel 3 to open. The motor drives the steel wire 22 to work, and the steel wire 22 pulls the second cross bar 7 to contract within the first cross bar 8. The liquid in the second channel 9 is injected into the first channel 3 and discharged into the second liquid storage pipe through the drainage pump. Then control the liquid pressure to be lower than 0.6 MPa, and the control component controls the first channel 3 to close. Under the resilience of the second spring 34, the second spring 34 pulls the second vertical rod 2 to contract within the first vertical rod 1, and the liquid in the first vertical channel 4 is discharged into the second liquid storage pipe through the drainage pump.

[0044] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, variations, modifications, and substitutions made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. Internal cleaning device for the tank body of an oil tanker, characterized in that: It includes a connecting component. One end of the connecting component is provided with a water pump system, and the other end is provided with a cleaning component. The connecting component includes a first link rod that is vertically telescopic and connected to the water pump system at one end. The other end of the first link rod is provided with a second link rod that is horizontally telescopic. Both the first link rod and the second link rod are controlled to expand and contract by a hydraulic system. Both the first link rod and the second link rod are hollow rods for transporting cleaning liquid. An annular first channel (3) connected to the hydraulic system is arranged along the length direction of the first link rod. An annular second channel (9) communicated with the first channel (3) is arranged along the length direction of the second link rod. A control component is arranged at the port of the first channel (3) far from the second channel (9). The control component controls the expansion and contraction of the second link rod according to the liquid pressure magnitude. The first link rod includes a first vertical rod (1). An annular first vertical channel (4) is arranged along the length direction inside the first vertical rod (1). The top end of the first vertical channel (4) is connected to the hydraulic system. A second vertical rod (2) is slidably arranged inside the first vertical channel (4). A second spring (34) is arranged inside the first vertical channel (4) and above the second vertical rod (2). The upper end of the second spring (34) is connected to the inner top of the first vertical channel (4), and its lower end is connected to the top end of the second vertical rod (2). A first sliding groove (5) is arranged on the inner side wall of the first vertical channel (4). A first sliding block (31) is arranged at the upper end of the second vertical rod (2). The first channel (3) is arranged on the second vertical rod (2).

2. The internal cleaning device for the tank body of an oil tanker according to claim 1, characterized in that: The second link rod includes a first horizontal rod (8) connected to the bottom of the second vertical rod (2). The second channel (9) is arranged on the first horizontal rod (8). A second horizontal rod (7) is slidably arranged inside the second channel (9). A second sliding groove (11) is arranged on the inner side wall of the second channel (9). A second sliding block (10) is arranged at one end of the second horizontal rod (7) close to the first channel (3).

3. The internal cleaning device for the tanker body according to claim 2, characterized in that: A steel wire (22) is arranged at one end of the second horizontal rod (7) close to the first channel (3). The steel wire (22) is arranged along the second channel (9), the first channel (3), and the first vertical channel (4), and extends out of the first link rod and is connected to a motor. The steel wire (22) pulls the second horizontal rod (7) to slide inside the second channel (9), and the second link rod contracts.

4. The internal cleaning device for the oil tanker tank body according to claim 2, characterized in that: The cleaning component includes a hollow third link rod (12). The third link rod (12) is connected to the end of the second horizontal rod (7) far from the first link rod. A plurality of high-pressure nozzles (24) are arranged at an angle on the circumferential side wall of the third link rod (12), and a plurality of high-pressure nozzles (24) are arranged at the end of the third link rod (12) far from the second horizontal rod (7).

5. The internal cleaning device for the tanker body according to claim 2, characterized in that: A fixing component detachably connected to the manhole (14) is provided at the upper end of the connecting component. The fixing component includes a first fixing cylinder (18). A second fixing cylinder (21) is slidably arranged on the periphery of the first fixing cylinder (18) along its axis direction. A first through hole is arranged along the axis of the second fixing cylinder (21). An even number of second through holes (17) are uniformly arranged on the inner side wall of the second fixing cylinder (21) perpendicular to its axis direction. A fixing block (16) is slidably arranged in the second through hole (17). The inner side wall of the fixing block (16) close to the first fixing cylinder (18) is an inclined surface. During operation, the bottom of the first fixing cylinder (18) presses against the inclined surface, and the outer side wall of the fixing block (16) abuts against the inner side wall of the manhole (14).

6. The internal cleaning device for the tanker body according to claim 5, characterized in that: A baffle (15) is arranged on the outer side wall of the fixing block (16). The bottom of the baffle (15) contacts the top of the manhole (14). A third through hole (23) is arranged along the axis of the first fixing cylinder (18). The first connecting rod passes through the third through hole (23) and is threadedly connected to the first fixing cylinder (18).

7. The tank body internal cleaning device of a tank truck according to claim 6, characterized in that: A third spring is arranged in the second through hole (17). One end of the third spring is fixedly connected to one end of the second through hole close to the baffle (15), and the other end is fixedly connected to one end of the fixing block (16) close to the inclined surface.

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