Rotational molding urea box and filling port thereof

Abstract

The utility model relates to a rotational moulding urea box and a filling port thereof, the urea box comprises the filling port, the filling port is obliquely welded on a urea box body, and the filling port comprises a metal cylinder body, an upper cover flange and a check ring; the barrel is used for fixing the upper cover flange and the fixed check ring, and the bottom is welded with the box body; the upper cover flange is fixed at the top end of the cylinder and is concentric with the cylinder, and the top surface exceeds the edge of the cylinder and is hermetically welded; and the check ring is arranged in the cylinder body, is concentric with the cylinder body and is parallel to the upper cover. The injection port is simple and reasonable in structural design, is free of delaminating and sinking during rotational molding, is easy to assemble, can be universally used on different rotational molding urea boxes, and meets various performance requirements of the rotational molding urea boxes.

Description

Technical Field

[0001] The utility model belongs to the technical field of urea tanks and relates to a roto-molded urea tank, in particular to a filling port for the roto-molded urea tank and the roto-molded urea tank with the filling port. Background Art

[0002] Traditional urea tanks are typically blow-molded, and their filling ports are also made of plastic. These ports are embedded into the tank body during near-molding. Roto-molded urea tanks, on the other hand, first manufacture the cavity, weld the filling port to the cavity, then add plastic powder, secure the filling port and sensor port fixtures, and secure the cavity. The tank then enters a heating furnace, where the temperature is raised to melt the plastic powder. A robotic arm rotates 360 degrees, evenly adhering the melted plastic powder to the inner wall of the cavity, thus forming the roto-molded urea tank. This makes roto-molded urea tank ports difficult to form, resulting in defects such as powder leakage, delamination, and cracking.

[0003] At present, with the rapid development of lightweight automobiles, the single urea tank is gradually replaced by the urea tank integrated fuel tank. It is necessary to optimize the structure of the rotomolded urea tank filling port to overcome the above problems. Summary of the Invention

[0004] In order to solve the problems of difficult molding, easy powder leakage, delamination, cracking and other problems of the existing roto-molded urea tank opening, the utility model proposes a roto-molded urea tank filling port which does not leak powder during roto-molding and has the advantages of anti-cracking, anti-sinking and anti-delamination after roto-molding, and a roto-molded urea tank having the filling port.

[0005] The utility model is realized through the following technical solutions:

[0006] The above-mentioned rotationally molded urea tank includes a tank body, a filling port, and a drain port; a first assembly hole is provided at the upper end of the tank body and a second assembly hole is provided at the bottom; the drain port is fixedly assembled at the second assembly hole; the filling port is welded to the upper end of the tank body and obliquely assembled at the first assembly hole, including a metal cylinder, an upper cover flange, and a retaining ring; the cylinder is used to fix the upper cover flange and the fixed retaining ring, and the bottom is welded to the tank body; the upper cover flange is fixed to the top of the cylinder, concentric with the cylinder, and the top surface exceeds the edge of the cylinder for sealing welding; the retaining ring is installed inside the cylinder, concentric with the cylinder and parallel to the upper cover; there is an embedded nut between the retaining ring and the upper cover flange; there is a rotationally molded layer at the filling port and the first assembly hole.

[0007] The rotationally molded urea tank, wherein: the barrel is cylindrical with uniform wall thickness, the top is flat, and the bottom is radially inclined downward to form an inclined surface, which is matched with the hole wall of the first assembly hole and welded and fixed.

[0008] The rotomolded urea tank has a top surface of the upper cover flange that protrudes 5 to 10 mm from the edge of the cylinder body. The upper cover flange is evenly distributed with 6 small holes for connecting the metal fittings of the filling port.

[0009] The rotationally molded urea tank, wherein: the retaining ring adopts an L-shaped structure and maintains a distance of 25 to 30 mm from the top surface of the upper cover flange.

[0010] The above-mentioned rotationally molded urea tank filling port, wherein: the filling port is welded to the tank body, including a cylinder, an upper cover flange, and a retaining ring; the cylinder is used to fix the upper cover flange and the retaining ring; the upper cover flange is fixed to the top of the cylinder, concentric with the cylinder, and the top surface exceeds the edge of the cylinder for sealing welding; the retaining ring is installed inside the cylinder, concentric with the cylinder and parallel to the upper cover.

[0011] The rotationally molded urea tank, wherein: the cylinder is in the shape of a cylinder with uniform wall thickness, the top is a plane, and the bottom is inclined downward along the radial direction to form an inclined surface.

[0012] The rotationally molded urea tank, wherein: the upper cover flange is evenly distributed with 6 small holes, and the top surface exceeds the edge of the cylinder by 5-10 mm.

[0013] The rotomolded urea tank, wherein: the retaining ring is welded to the cylinder in sections, maintaining a distance of 25-30 mm from the top surface of the upper cover flange, and there are no obvious welding marks on the outside of the cylinder. The retaining ring adopts an L-shaped structure, with both sides being 10 mm, and the diameter is consistent with the inner diameter of the cylinder. Beneficial effects

[0014] The utility model rotomolded urea tank filling port simplifies the rotomolding tooling and the tightening and positioning device of the filling port in the tooling design of the rotomolded urea tank. It prevents powder leakage during rotomolding and has the functions of preventing cracking, sinking, and delamination after rotomolding. The utility model filling port has a simple and reasonable structural design, has the advantages of no delamination or sinking during rotomolding, is easy to assemble, and can be used on different rotomolded urea tanks, meeting all the performance requirements of rotomolded urea tanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of the rotomolded urea tank of the utility model;

[0016] Figure 2 This is a structural diagram of the filling port of the rotomolded urea tank of the utility model;

[0017] Figure 3 This is the front view of the filling port of the rotomolded urea tank of the utility model;

[0018] Figure 4 This is a cross-sectional view of the filling port of the rotationally molded urea tank of the present invention. DETAILED DESCRIPTION

[0019] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0020] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0021] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "inside", "outside", "up", "down", "front", and "back" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present application.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0023] like Figure 1 As shown, the rotationally molded urea tank of the present invention includes a tank body 1, a filling port 2, and a sewage outlet 3.

[0024] The upper end of the box body 1 is provided with a first assembly hole 11 , and the bottom is provided with a second assembly hole 12 .

[0025] like Figures 2 to 4 As shown, the filling port 2 is welded to the first assembly hole 11 at the upper end of the box body 1, and includes a cylinder 21, an upper cover flange 22, and a retaining ring 23.

[0026] The cylinder 21 is made of metal and is used to fix the upper cover flange 22 and the fixing retaining ring 23, and is assembled at the first assembly hole 11 of the box body 1; the cylinder 21 is a cylindrical shape with uniform wall thickness, a flat top, and a bottom end face 211 that is radially inclined downward. The inclined surface is matched with the hole wall of the first assembly hole 11 and is welded and fixed, so that the cylinder 21 is tilted and fixed to the outer wall of the box body 1; the diameter of the cylinder 21 can be adjusted according to customer requirements, and the length and lower end can be adjusted as needed.

[0027] The upper cover flange 22 is fixed to the top of the cylinder 21 and is concentric with the cylinder 21. The top surface of the upper cover flange 22 is sealed and welded to the edge of the cylinder 21 at a certain distance. In this embodiment, the outer wall of the upper cover flange 22 and the inner wall of the cylinder 21 are sealed and welded to the top of the cylinder 21.

[0028] The retaining ring 23 is installed inside the cylinder 21, concentric with the cylinder 21 and parallel to the upper cover flange 22; an embedded nut 24 is provided between the retaining ring 23 and the upper cover flange 22, and the retaining ring 23 maintains a distance of 25 to 30 mm from the top surface of the upper cover flange 22, which facilitates the installation of the embedded nut 24 before rotational molding;

[0029] A rotational molding layer 25 is provided at the assembly connection between the filling port 2 and the first assembly hole 11 .

[0030] Since the filling port 2 is provided with a barrel 21 with a metal shell, the rotomolding tooling is directly fixed to the filling port 2 by screws assembled with the pre-embedded nuts 24 in the filling port 2, thus overcoming the problem that the rotomolding tooling cannot take root in the filling port without a metal shell and needs to be fixed and positioned by external tooling. The rotomolding tooling fits perfectly with the filling port 2 without any gap, so there is no leakage during rotomolding. After rotomolding, the rotomolding layer 25 is evenly adhered to the inner layer of the filling port 2. Since a retaining ring 23 is provided in the middle of the filling port 2, the retaining ring 23 is also evenly adhered to the rotomolding layer after rotomolding. At this time, the retaining ring 23 prevents the risk of the rotomolding layer above the retaining ring from falling and peeling off, and at the same time firmly fixes the rotomolding layer below the retaining ring 23 to prevent the rotomolding layer 25 from peeling off and falling off.

[0031] The sewage outlet 3 is provided at the bottom of the box body 1 and is fixedly assembled at the second assembly hole 12 .

[0032] like Figure 2-4 As shown, further, the upper cover flange 22 is evenly distributed with 6 small holes 221 with a diameter of 6 mm, which are used for the metal connection of the filling port 2.

[0033] Furthermore, the top surface of the upper cover flange 22 extends 5-10 mm beyond the edge of the cylinder 21 .

[0034] Furthermore, the retaining ring 23 is assembled in the cylinder 21 as required, and the fixing method adopts segmented welding. The welding is required to be firm and not fall off, and there is no obvious welding mark on the outside of the cylinder 21.

[0035] Furthermore, the cross section of the retaining ring 23 is L-shaped, with both sides being 10 mm, and the diameter being consistent with the inner diameter of the cylinder 21 .

[0036] Therefore, the urea tank filling port of the utility model has the advantages of no delamination and no sinking during rotational molding, easy assembly, and can be used on different rotational molded urea tanks, meeting various performance requirements of the rotational molded urea tanks. It also has a simple structure, clear functions, and a reasonable manufacturing process, and can be applied to various rotational molded urea tanks.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotomolded urea tank, comprising a tank body, a filling port, and a drain port; the tank body is provided with a first assembly hole at the upper end and a second assembly hole at the bottom; the drain port is fixedly assembled at the second assembly hole; and characterized in that: The filling port is welded to the upper end of the box body and is obliquely assembled at the first assembly hole, comprising a metal cylinder, an upper cover flange, and a retaining ring; The cylinder is used to fix the upper cover flange and the fixing retaining ring, and the bottom is welded to the box body; The upper cover flange is fixed to the top of the cylinder, concentric with the cylinder, and the top surface exceeds the edge of the cylinder for sealing welding; The retaining ring is installed inside the cylinder, concentric with the cylinder and parallel to the upper cover flange; There is an embedded nut between the retaining ring and the upper cover flange; A rotational molding layer is provided at the filling port and the first assembly hole.

2. The rotationally molded urea tank according to claim 1, characterized in that: The cylinder is in the shape of a cylinder with uniform wall thickness, with a flat top and a bottom that is radially inclined downward to form an inclined surface, which is matched with the hole wall of the first assembly hole and is welded and fixed.

3. The rotationally molded urea tank according to claim 1, characterized in that: The top surface of the upper cover flange exceeds the edge of the cylinder by 5 to 10 mm.

4. The rotationally molded urea tank according to claim 1, characterized in that: The upper cover flange is evenly distributed with 6 small holes for connecting the metal parts of the filling port.

5. The rotationally molded urea tank according to claim 1, characterized in that: The retaining ring adopts an L-shaped structure and maintains a distance of 25 to 30 mm from the top surface of the upper cover flange.

6. A rotomolded urea tank filling port, characterized by: The filling port is welded to the box body, including a cylinder, an upper cover flange, and a retaining ring; The cylinder is used to fix the upper cover flange and the retaining ring; The upper cover flange is fixed to the top of the cylinder, concentric with the cylinder, and the top surface exceeds the edge of the cylinder for sealing welding; The retaining ring is installed inside the cylinder, is concentric with the cylinder and is parallel to the upper cover.

7. The rotomolded urea tank filling port according to claim 6, characterized in that: The cylinder body adopts a cylindrical shape with uniform wall thickness, a flat top and a bottom that is inclined downward along the radial direction to form an inclined surface.

8. The rotomolded urea tank filling port according to claim 6, characterized in that: The upper cover flange is evenly distributed with 6 small holes, and the top surface exceeds the edge of the cylinder by 5-10 mm.

9. The rotomolded urea tank filling port according to claim 6, characterized in that: The retaining ring is welded in sections in the cylinder at a distance of 25 to 30 mm from the top surface of the upper cover flange, and there is no obvious welding mark outside the cylinder.

10. The rotomolded urea tank filling port according to claim 6, characterized in that: The retaining ring adopts an L-shaped structure, with both sides being 10 mm and a diameter consistent with the inner diameter of the cylinder.

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