Tank structure and semitrailer with reduced tank residue

Abstract

A kind of tank structure and semitrailer for reducing tank residue, including tank, the compartment board being arranged in tank, frame crossbeam and tank guide groove assembly, the upper surface of the frame crossbeam is provided with a downward recessed arc channel area in middle position, the width of this channel area is 185mm, depth is 6mm, and with the arc of beam smooth transition;The bottom plate of the tank is attached with the upper surface of the frame crossbeam, and forms a continuous water channel above the arc channel area;The tank guide groove assembly includes tank guide groove arc plate and tank guide groove sealing plate, the arc plate is semicircular arc structure, which is connected with tank interior splice welding.

Description

Technical Field

[0001] This utility model relates to tank structure, specifically a tank structure and semi-trailer that reduces tank residue. Background Technology

[0002] In the tank truck transportation sector, semi-trailer tank trucks are core equipment for oil transportation, and their tank unloading rate directly affects transportation efficiency and customer needs. With increasing market demands for precision in oil transportation, some high-end customers (such as BP and Shell) have imposed extremely stringent standards on the amount of residual oil in the tank, explicitly requiring that, under conditions of a towing height of ±100mm, the residual oil in each compartment of the semi-trailer tank must not exceed one ten-thousandth of the compartment's capacity.

[0003] However, the traditional semi-trailer tanker manufacturing process has significant defects and cannot meet the above-mentioned high standards: On the one hand, in the traditional process, the welding of the frame crossbeams and the tank bottom plate easily forms a protrusion inside the tank bottom, blocking the oil's gravity flow path and causing the oil to stagnate in the protruding area, making it difficult to completely discharge; on the other hand, the internal guide channels are mostly prefabricated as a whole or have a square structure, which not only makes it difficult to accurately position them during assembly inside the tank, but also easily causes the guide channels to shift and become blocked due to thermal deformation during the welding process, further affecting the oil confluence efficiency; at the same time, the traditional dipstick sleeve fixing seat design does not consider the impact of welding deformation on the tank bottom channel, and the full circumference welding of the fixing seat to the tank bottom is prone to causing local deformation, exacerbating the residue problem. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a tank structure and semi-trailer that reduces tank residue, effectively solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The present invention includes a tank body, a partition plate disposed in the tank body, a frame crossbeam, and a tank internal guide channel assembly. The upper surface of the frame crossbeam is provided with a downwardly recessed arc-shaped channel area in the middle position. The channel area has a width of 185mm and a depth of 6mm, and smoothly transitions with the arc of the crossbeam. The bottom plate of the tank is attached to the upper surface of the frame crossbeam, forming a continuous water flow channel above the arc-shaped channel area; The internal flow guide trough assembly includes an internal flow guide trough arc plate and an internal flow guide trough sealing plate. The arc plate has a semi-circular arc structure and is welded to the inside of the tank.

[0006] Preferably, the bottom inner surface of the tank is also provided with a number of longitudinal anti-deformation reinforcing plates arranged symmetrically and alternately.

[0007] Preferably, it also includes an anti-deformation tooling for controlling the welding deformation of the guide channel inside the tank. The tooling includes an upper top seat, a lower base, and a bidirectional screw and nut assembly connecting the upper top seat and the lower base. By rotating the bidirectional screw and nut assembly, the upper top seat and the lower base can move relative to each other to achieve expansion or contraction.

[0008] Preferably, the anti-deformation tooling is made of all-aluminum alloy material.

[0009] Preferably, it also includes a dipstick sleeve assembly, which includes a dipstick sleeve, an upper dipstick sleeve fixing seat, and a lower dipstick sleeve fixing seat. The measuring tape sleeve is fixed to the manhole seat on the top of the tank. The lower fixing seat of the dipstick sleeve is welded to the lowest point of the bottom of the tank and has a small folded edge structure that bends inward. The lower fixing seat of the dipstick sleeve is welded to the bottom of the tank only on one side of its folded edge, and the other three sides are not welded to the bottom of the tank.

[0010] Preferably, the bottom plate of the tank bottom in the area forward of the foremost traction seat of the tank body and the bottom plate of the tank bottom at the sealing point of the internal guide channel assembly retain their original shape and do not deform downward.

[0011] A semi-trailer tanker truck is equipped with the aforementioned tank structure for improving the unloading rate of the tank.

[0012] Beneficial effects: By using the structure of "cutting down 6mm (arc transition) in the 185mm area above the middle of the frame crossbeam + directional hammering and bonding of the tank bottom plate", the welding protrusion between the crossbeam and the tank bottom plate is offset, forming a continuous water flow channel at the bottom of the tank, ensuring the oil flows by itself and reducing residue; avoiding hammering the bottom of the tank at the front traction seat area and the sealing of the internal guide channel, thus avoiding water accumulation and residue.

[0013] By using the "all-aluminum alloy split anti-deformation tooling (upper top seat + lower base + two-way screw nut)", the arc plate of the guide channel is tightened and the bottom of the tank is pressed during welding, which controls the welding deformation of the guide channel, ensures its semi-circular arc-shaped confluence structure, improves the oil confluence efficiency, and reduces residue.

[0014] By using "symmetrical staggered spot welding of longitudinal anti-deformation reinforcing plates at the bottom of the tank", the longitudinal wave deformation of the tank is resisted, the straightness of the water flow channel is ensured, and the channel blockage is avoided, resulting in residue; the plates are removed after welding without affecting the use of the tank.

[0015] The "split structure of the internal guide channel with arc plate first and sealing plate later" facilitates tooling assembly and disassembly, ensures the welding quality of the guide channel, and its semi-circular arc structure also reduces the storage space occupied and improves transportation efficiency.

[0016] The structure of "small folded edge of the fixed seat under the dipstick sleeve + single-sided welding" avoids damage to the dipstick from impacting the bottom of the tank (prevents dents and oil accumulation) and reduces the impact of welding deformation on the water flow channel; the fixed seat is located at the lowest point of the tank bottom to ensure accurate oil measurement and help control residue. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the crossbeam structure of the vehicle frame of this utility model; Figure 4 This is a schematic diagram of the installation structure of the arc plate of the internal guide channel of this utility model; Figure 5 This is a utility model Figure 4 Side view.

[0018] Figure 6 This is a schematic diagram of the bidirectional screw and nut combination structure of this utility model; Figure 7 This is a utility model Figure 6 Side view; Figure 8 This is a schematic diagram of the manhole seat ring installation structure of this utility model; Figure 9 This is a schematic diagram of the structure of this utility model from direction A; Figure 10 This is a schematic diagram of the lower fixing seat structure of the measuring tape sleeve of this utility model. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-10 The specific embodiments of this utility model will be described in further detail.

[0020] Implementation examples, by Figure 1-10 This utility model provides a tank structure and semi-trailer that reduces tank residue, including a tank 1, a partition plate 2 disposed inside the tank, a frame crossbeam 4, and an internal guide channel assembly 3, characterized in that: The upper surface of the crossbeam 4 has a downwardly recessed arc-shaped channel area in the middle. The channel area is 185mm wide and 6mm deep, and smoothly transitions with the arc of the crossbeam. The bottom plate of the tank 1 is attached to the upper surface of the frame beam 4, and a continuous water flow channel is formed above the arc-shaped channel area. The internal flow guide trough assembly 3 includes an internal flow guide trough arc plate 7 and an internal flow guide trough sealing plate 8. The arc plate 7 is a semi-circular arc structure and is welded to the inside of the tank body 1.

[0021] Pretreatment of vehicle frame crossbeams Using CNC or laser programming cutting, the middle position of the upper surface of each frame crossbeam 4 is processed to cut out an arc-shaped channel area with a width of 185mm and a depth of 6mm, ensuring a smooth transition between the channel area and the arc of the crossbeam. After processing, the surface is polished to remove burrs.

[0022] The tank bottom plate fits snugly against the vehicle frame. Align the bottom plate of tank 1 with the upper surface of the pre-treated frame crossbeam 4, and use a leather mallet to tap from the inside out of the tank bottom (only tap the bottom plate above the arc-shaped channel area and the non-specially protected area) to ensure a tight fit between the bottom plate and the crossbeam. Then weld them together to form the water flow channel at the bottom of the tank. Note: Do not tap the bottom plate in the area forward of the front traction seat 5 of tank 1 and at the sealing point of the internal guide channel assembly 3; keep them in their original shape.

[0023] Installation of longitudinal anti-deformation reinforcing plate Along the longitudinal direction of the inner bottom surface of tank 1, several longitudinal anti-deformation reinforcing plates 16 are symmetrically and staggeredly spot-welded (arranged in sections according to the length of the compartment). During welding, the current and welding speed are controlled to avoid excessive welding that could lead to deformation. After the entire tank 1 and the frame are fully welded together, the longitudinal anti-deformation reinforcing plates 16 are removed using a grinder, and the bottom surface of the tank is polished.

[0024] Tank internal guide channel assembly installation and welding First, place the arc plate 7 of the guide channel inside the tank into the preset position inside the tank body 1 and adjust it to fit against the tank wall; Disassemble the anti-deformation fixture (upper top seat 9, double-direction screw and nut assembly 10, lower base 12), and bring them into the tank body 1 one by one before assembling them. Use the detachable wrench 11 to rotate the double-direction screw and nut assembly 10 to reduce the distance between the upper top seat and the lower base, and insert the fixture into the tank between the inner guide channel arc plate 7 and the bottom of the tank. Use the detachable wrench 11 again to rotate the double-ended screw nut assembly 10, so that the upper top seat 9 presses against the arc plate 7 and the lower base 12 presses against the bottom of the tank. After fixing, weld the connection between the arc plate 7 and the tank wall. After welding, rotate the bidirectional screw and nut assembly 10 in the opposite direction, disassemble the anti-deformation tooling, and finally weld the inner guide channel sealing plate 8 to the open end of the arc plate 7 to complete the installation of the guide channel assembly.

[0025] Dipstick sleeve assembly installation Weld the oil dipstick sleeve fixing seat 13 onto the manhole seat ring 17 on the top of the tank; Weld the lower fixing seat 15 of the dipstick sleeve at the lowest point of the bottom of tank body 1 (weld only on the folded side). Pass the dipstick sleeve 14 through the upper fixed seat 13, aligning the lower end with the lower fixed seat 15. Use clamps and bolts to fix the sleeve to the lower fixed seat, ensuring that the sleeve is vertical and stable.

[0026] Working principle: Pre-treatment of the arc-shaped recess in the frame crossbeam: In the core area with a width of 185mm above the middle of each frame crossbeam, a 6mm arc-shaped recess is cut downwards using CNC or laser programming to form a smooth transition between the recessed area and the curvature of the frame crossbeam itself. This design eliminates the upward bulge that may occur after the crossbeam is welded to the tank bottom plate from the structural source, reserving space for the subsequent water flow channel; Oriented hammering and bonding of the tank bottom plate: During the assembly of the chassis and tank body, a leather hammer is used to hammer the tank bottom plate from the inside out (only above the arc-shaped recessed area and non-specially protected areas) to ensure a tight fit between the tank bottom plate and the arc-shaped recessed area and other areas of the chassis crossbeam. At the same time, hammering is strictly avoided in two special areas: the very front of the tank body (the area in front of the traction seat) is prone to water accumulation if hammered (there is no unloading port in this area, so the water cannot be drained); and the bottom of the tank at the sealing point of the internal guide channel is prone to water accumulation inside the guide channel. Through directional operation, a continuous and smooth longitudinal water flow channel is ultimately formed at the bottom of the tank, providing a gravity-fed path for oil to flow from various areas of the tank to the unloading port.

[0027] II. Welding Deformation Control Principle: Tooling constraints + reinforcing plates resist deformation and maintain channel integrity. Thermal deformation during welding can easily cause the water flow channel at the bottom of the tank to shift, narrow, or even become blocked. This process uses a double protection of "anti-deformation tooling + longitudinal reinforcing plate" to precisely control deformation. Deformation-resistant fixture for the internal flow channel: The internal flow channel is a key structure for oil collection at the unloading port, and its welding deformation directly affects the collection efficiency. This process uses a split-type anti-deformation fixture made entirely of aluminum alloy (including an upper top seat, a lower base, and a two-way screw and nut assembly), utilizing the principle of "adjustable support constraint" to control deformation. During tooling assembly, the upper top seat, the two-way screw and nut combination (the screw and nut are left-handed and right-handed in opposite directions), and the lower base are brought into the tank and assembled. The distance between the upper top seat and the lower base is reduced by rotating the screw with a detachable wrench, which makes it easier for the tooling to be inserted between the arc plate of the guide channel and the bottom of the tank. Before welding, the screw is rotated in the opposite direction to make the upper seat press against the arc plate of the guide channel inside the tank and the lower base press against the bottom of the tank. The relative position of the arc plate of the guide channel and the bottom of the tank is constrained by the bidirectional rigid support to avoid the guide channel shifting or the bottom of the tank sinking due to welding thermal deformation. After welding, the tooling is removed by reversing the operation to ensure that the guide channel maintains a semi-circular arc structure (which is more conducive to oil flow and saves storage space compared to a square structure) and ensures the stability of the confluence path. Longitudinal anti-deformation reinforcement plates resist tank body wave deformation: Two longitudinal anti-deformation reinforcement plates are symmetrically and staggeredly spot-welded to the bottom of the tank from the front to the rear (arranged in sections according to the length of the compartment). These reinforcement plates, arranged symmetrically and vertically, form a rigid support along the longitudinal direction of the tank body, resisting longitudinal wave deformation that may occur during tank welding or under stress (wave deformation can cause unevenness in the water flow channel, obstructing oil flow). After the tank body and frame are fully welded together, the reinforcement plates are removed and the surfaces are polished, ensuring the straightness of the water flow channel during welding without affecting the subsequent use of the tank.

[0028] III. Principle of Auxiliary Structure Collaboration: Detailed optimization + functional adaptation to reduce residual risks and damage. The principle of the split assembly of the internal flow guide channel: This method abandons the traditional approach of fabricating the internal flow guide channel as a whole on the outside of the tank and then installing it inside. Instead, it adopts a split process of "welding the arc plate first + welding the sealing plate later." First, the arc plate of the internal flow guide channel is assembled with the tank body. At this stage, since the sealing plate is not yet installed, anti-deformation fixtures can be easily added inside the flow guide channel. After the arc plate is welded and the fixtures are removed, the sealing plate of the internal flow guide channel is then welded to the arc plate for sealing. This process solves the problems of difficulty in installing and removing fixtures in a one-piece flow guide channel, ensuring the welding quality and confluence function of the flow guide channel. Damage and deformation reduction principle of dipstick sleeve fixing seat: The lower fixing seat of dipstick sleeve adopts a "small folded edge + single-sided welding" design, which optimizes the reduction of residual-related risks. The small folded edge structure ensures that when the dipstick is inserted into the sleeve, the bottom directly impacts the folded edge rather than the bottom of the tank, thus avoiding dents at the bottom of the tank due to impact (dents easily accumulate oil). The fixed seat is welded to the bottom of the tank only on one side of the folded edge, and the other three sides are not welded. This minimizes the local deformation of the tank bottom caused by welding heat input and avoids blocking the water flow channel due to deformation. At the same time, the fixed seat under the dipstick sleeve is welded to the lowest point of the tank bottom to ensure that the lowest liquid level in the tank can be accurately measured when measuring oil, which indirectly helps to control the residual amount.

[0029] IV. Oil Confluence and Unloading Principles: Zoned Guidance + Structural Adaptation to Reduce Residue in Storage Tanks By combining the structural adaptation of the baffle plate and the guide channel, efficient convergence of oil products in different zones can be achieved: The internal partition plates divide the tank into compartments of different volumes. Since the front of the semi-trailer tanker needs to be embedded in the tractor's saddle for towing, a bottom valve cannot be installed. Therefore, an arc-shaped notch is made at the bottom of the partition plate of the first compartment at the front of the tank. This notch is welded to the arc plate of the guide channel inside the tank, allowing the oil in the first compartment to flow into the guide channel through the arc-shaped notch. The oil in the other compartments flows naturally into the guide channel along the bottom water channel. Finally, all the oil is collected in the guide channel and discharged at the unloading port (bottom valve) at the rear of the tank. Through the principle of "zoning guidance + centralized confluence", the oil in each compartment is emptied as much as possible, thereby improving the unloading rate.

[0030] Beneficial effects: By using the structure of "cutting down 6mm (arc transition) in the 185mm area above the middle of the frame beam 4 + directional hammering and bonding of the bottom plate of the tank body 1", the welding protrusion between the frame beam 4 and the bottom plate of the tank body 1 is offset, forming a continuous water flow channel at the bottom of the tank, ensuring the oil flows by itself and reducing residue; avoiding hammering the bottom of the tank at the front traction seat 5 area of ​​the tank body 1 and the sealing point of the internal guide channel assembly 3, avoiding water accumulation and residue.

[0031] By using the "all-aluminum alloy split anti-deformation tooling (upper top seat 9 + lower base 12 + double-direction screw and nut combination 10)", the arc plate 7 of the inner guide channel is tightened during welding, and the bottom of the tank body 1 is pressed, controlling the welding deformation of the inner guide channel assembly 3, ensuring the semi-circular arc confluence structure of the inner guide channel arc plate 7, improving the oil confluence efficiency and reducing residue.

[0032] By "symmetrically and staggeredly spot-welding longitudinal anti-deformation reinforcing plates 16 at the bottom of tank 1", longitudinal wave deformation of tank 1 is resisted, the straightness of the water flow channel is ensured, and the channel blockage is avoided, resulting in residue; after welding, the longitudinal anti-deformation reinforcing plates 16 are removed without affecting the use of tank 1.

[0033] The "split structure" of "tank internal guide channel assembly 3, tank internal guide channel arc plate 7 welded first, and tank internal guide channel sealing plate 8 welded later" facilitates tooling assembly and disassembly, ensures welding quality of tank internal guide channel assembly 3, and the semi-circular arc structure of tank internal guide channel arc plate 7 also reduces storage space occupation and improves transportation efficiency.

[0034] The "small folded edge + single-sided welding" structure of the dipstick sleeve lower fixing seat 15 avoids damage caused by the dipstick hitting the bottom of the tank 1 (prevents dents and oil accumulation) and reduces the impact of welding deformation on the water flow channel; the dipstick sleeve lower fixing seat 15 is located at the lowest point of the bottom of the tank 1 to ensure accurate oil measurement and help control residue.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tank structure for reducing tank residue, comprising a tank body (1), a partition plate (2) disposed within the tank body, a frame crossbeam (4), and an internal flow channel assembly (3), characterized in that: The upper surface of the crossbeam (4) of the frame is provided with a downwardly recessed arc-shaped channel area in the middle position. The channel area is 185mm wide and 6mm deep, and smoothly transitions with the arc of the crossbeam. The bottom plate of the tank (1) is attached to the upper surface of the frame beam (4) and forms a continuous water flow channel above the arc-shaped channel area; The in-tank guide channel assembly (3) includes an in-tank guide channel arc plate (7) and an in-tank guide channel sealing plate (8). The arc plate (7) is a semi-circular arc structure and is welded to the inside of the tank body (1).

2. The tank structure for reducing tank residue according to claim 1, characterized in that: The bottom inner surface of the tank (1) is also symmetrically and alternately arranged with several longitudinal anti-deformation reinforcing plates (16).

3. The tank structure for reducing tank residue according to claim 2, characterized in that: It also includes a deformation-resistant fixture for controlling the welding deformation of the guide channel inside the tank. The fixture includes an upper top seat (9), a lower base (12), and a bidirectional screw and nut assembly (10) connecting the upper top seat and the lower base. By rotating the bidirectional screw and nut assembly (10), the upper top seat (9) and the lower base (12) can move relative to each other to achieve expansion or contraction.

4. The tank structure for reducing tank residue according to claim 3, characterized in that: The anti-deformation tooling is made of all-aluminum alloy material.

5. A tank structure for reducing tank residue according to claim 1, characterized in that: It also includes a dipstick sleeve assembly (6), which includes a dipstick sleeve (14), an upper dipstick sleeve fixing seat (13), and a lower dipstick sleeve fixing seat (15). The measuring tape sleeve fixing seat (13) is fixed to the manhole seat ring (17) on the top of the tank; The lower fixing seat (15) of the dipstick sleeve is welded to the lowest point of the bottom of the tank body (1) and has a small folded edge structure that bends inward. The lower fixing seat (15) of the dipstick sleeve is welded to the bottom of the tank body (1) on one side of its folded edge, and the other three sides are not welded to the bottom of the tank body.

6. A tank structure for reducing tank residue according to claim 5, characterized in that: The bottom plate of the tank bottom in the area of ​​the frontmost traction seat (5) of the tank body (1) and the bottom of the tank bottom at the sealing point of the inner guide channel assembly (3) retains its original shape and does not deform downward.

7. A semi-trailer, characterized in that, The semi-trailer is equipped with a tank structure as described in any one of claims 1-6 to reduce tank residue.

Images