Rotational molding urea box and drain outlet thereof

Abstract

The utility model relates to a rotational molding urea box and a drain outlet thereof. The rotational molding urea box comprises the drain outlet. The sewage draining exit comprises a base body and an aluminum alloy sleeve, the base body is of a cylindrical structure with internal threads, and an annular groove is formed in the periphery of the upper portion. The aluminum alloy sleeve is sleeved below the annular groove in the periphery of the lower middle portion of the base body in a transition fit mode and is fixedly welded to the box body. The sewage draining exit has the advantages of no delamination and separation in rotational molding, easiness in assembly, capability of being universally used on different rotational molding urea boxes, and capability of meeting various performance requirements of the rotational molding urea boxes. According to the rotational molding urea box with the drain outlet, a rotational molding tool of the drain outlet can be simplified, a positioning device can be omitted, powder leakage is avoided during rotational molding, and meanwhile, the rotational molding urea box has the effects of preventing cracking, stripping and delaminating after rotational molding and preventing liquid leakage in the using process.

Description

TECHNICAL FIELD

[0001] The utility model belongs to urea tank technical field relates to a kind of rotational moulding urea tank, and it relates to a kind of rotational moulding urea tank drain and the rotational moulding urea tank with the drain of this. BACKGROUND

[0002] Traditional urea tank is generally blow molding, and its drain is also plastic. It is blow molded, and a thread is formed on the outside for plugging urea solution. The rotational molding urea tank is manufactured by first manufacturing a cavity, welding the drain to the cavity, inserting a special plug into the thread of the drain, then adding plastic powder, fixing the filling port tooling and sensor port tooling, and then fixing the cavity. Then it is put into a heating furnace, the temperature in the furnace is increased to melt the plastic powder in the cavity, and the melted plastic powder is evenly adhered to the inner wall of the cavity by rotating the mechanical arm 360 degrees, thereby forming a rotational molding urea tank. Therefore, the rotational molding urea tank drain has the defects of poor sealing, liquid leakage, delamination and cracking.

[0003] With the rapid development of automobile lightweight, the trend of replacing individual urea tank with urea tank integrated fuel tank, the defects of rotational molding urea tank drain, such as delamination, cracking and liquid leakage, need to be solved. SUMMARY

[0004] The utility model discloses a kind of rotational molding special urea tank and its drain, to solve the above-mentioned rotational molding urea tank drain with delamination, cracking, liquid leakage and other problems, and propose a kind of rotational molding special urea tank, which is simple to assemble and has no powder leakage during rotational molding, prevents cracking, peeling and delamination after rotational molding, and prevents liquid leakage during the process.

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

[0006] The rotational molding urea tank described above includes a tank body, a drain and a filling port. The tank body has a first assembly hole at the bottom and a second assembly hole at the upper end. The filling port is assembled in the second assembly hole of the tank body. The drain is arranged at the bottom of the tank body and is welded and assembled at the first assembly hole. The drain includes a base and an aluminum alloy sleeve. The base is a cylindrical structure with internal threads, and an annular groove is provided on the outer periphery of the upper part. The aluminum alloy sleeve is transitionally fitted around the outside of the base below the annular groove and is welded and fixed to the tank body. A rotational molding layer is provided on the assembly of the drain and the first assembly hole.

[0007] In the rotational molding urea tank, the base is made of stainless steel, and a step is formed on the lower end surface of the base and recessed along the circumference. The lower end of the aluminum alloy sleeve has an inner convex ring that matches and limits the step of the base.

[0008] The rolling plastic urea tank, wherein: the filling opening comprises a cylinder, an upper cover flange and a check ring; the cylinder is used for fixing the upper cover flange and the check ring and is obliquely assembled on the tank body; the upper cover flange is fixed on the top end of the cylinder, is concentric with the cylinder and is sealingly welded on the top surface which exceeds the edge of the cylinder; and the check ring is arranged inside the cylinder and is concentric with the cylinder.

[0009] The rolling plastic urea tank, wherein: the filling opening comprises a cylinder, an upper cover flange and a check ring; the cylinder is used for fixing the upper cover flange and the check ring and is obliquely assembled on the tank body; the upper cover flange is fixed on the top end of the cylinder, is concentric with the cylinder and is sealingly welded on the top surface which exceeds the edge of the cylinder; and the check ring is arranged inside the cylinder and is concentric with the cylinder.

[0010] The rolling plastic urea tank, wherein: the filling opening comprises a cylinder, an upper cover flange and a check ring; the cylinder is used for fixing the upper cover flange and the check ring and is obliquely assembled on the tank body; the upper cover flange is fixed on the top end of the cylinder, is concentric with the cylinder and is sealingly welded on the top surface which exceeds the edge of the cylinder; and the check ring is arranged inside the cylinder and is concentric with the cylinder. Beneficial effects

[0011] The rolling plastic urea tank has the advantages that the rolling plastic urea tank is not delaminated, is not separated, is easy to assemble, is universal on different rolling plastic urea tanks and meets the performance requirements of the rolling plastic urea tank.

[0012] The rolling plastic urea tank with the pollution discharge opening structure simplifies the pollution discharge opening rolling plastic tool and cancels the positioning device in the tool design, has no powder leakage during rolling, has the effects of preventing cracking, preventing delamination and preventing liquid leakage during use. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The utility model discloses a rolling plastic urea tank structure schematic diagram;

[0014] Figure 2 The utility model discloses a rolling plastic urea tank structure schematic diagram;

[0015] Figure 3 The utility model discloses a rolling plastic urea tank structure schematic diagram;

[0016] Figure 4 The utility model discloses a rolling plastic urea tank structure schematic diagram;

[0017] Figure 5 The utility model discloses a rolling plastic urea tank structure schematic diagram; DETAILED DESCRIPTION

[0018] The technical solutions of the embodiments of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot be used to limit the protection scope of the present application.

[0019] In the description of the embodiments of the present application, the technical terms "first", "second", etc. 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.

[0020] In the description of the embodiments of the present application, the technical terms "inner", "outer", "upper", "lower", "front", "rear", etc. indicate the orientation or positional relationship shown in the drawings, and 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 devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0021] The utility model will be described in detail below with reference to the drawings and specific embodiments.

[0022] As shown in the drawings, Figure 1 The rotomolded urea tank of the present application comprises a tank body 1, a pollution discharge port 2, and a filling port 3.

[0023] The tank body 1 is provided with a first assembly hole 11 at the bottom and a second assembly hole 12 at the upper end.

[0024] The pollution discharge port 2 is arranged at the bottom of the tank body 1 and is welded and assembled at the first assembly hole 11, and the specific structure is shown in the drawings, Figures 2 to 4 which comprises a base body 21 and an aluminum alloy sleeve 22.

[0025] The base body 21 is a cylindrical structure with internal threads and an annular groove 211 at the upper part.

[0026] The aluminum alloy sleeve 22 is shorter than the base body 21 and is sleeved at the middle and lower part of the base body 21, and the lower part is welded and fixed to the tank body 1. The aluminum alloy sleeve 22 is pressed into the annular groove 211 at the outer periphery of the base body 21 below, ensuring airtightness without loosening.

[0027] Further, the base body 21 is made of stainless steel, and the lower part is provided with a step 222 formed by recessing from the lower end surface upward along the circumference; the lower end of the aluminum alloy sleeve 22 has an inner convex ring 221, which is matched and limited with the step 222 of the base body 21.

[0028] The assembly part of the pollution discharge port 2 and the first assembly hole 11 is covered with a rotomolded layer 23; the rotomolded layer 23 is embedded into the annular groove 211 of the pollution discharge port 2, and is wrapped up and down, with the upper and lower bosses wrapping the plastic layer at the pollution discharge port 2 in the middle, avoiding delamination and separation.

[0029] The filling port 3 is fixedly installed in the second assembly hole 12 of the box body 1, as shown in the drawings, comprising a metal cylinder 31, an upper cover flange 32 and a retaining ring 33. Figure 5 The metal cylinder 31 is used for fixing the upper cover flange 32 and the retaining ring 33 and is obliquely assembled at the first assembly hole 11 of the box body 1.

[0030] The metal cylinder 31 is used for fixing the upper cover flange 32 and the retaining ring 33 and is obliquely assembled at the first assembly hole 11 of the box body 1.

[0031] The upper cover flange 32 is fixed to the top end of the cylinder 31 and is concentric with the cylinder 31, and the top surface of the upper cover flange 32 is sealingly welded beyond the edge of the cylinder 31; the top surface of the upper cover flange 32 is uniformly distributed with small holes 321 for connecting gold parts of the filling port 3.

[0032] The retaining ring 33 is installed at the lower end inside the cylinder 31 and is concentric with the cylinder 31, and is 25-30mm away from the top surface of the upper cover flange 32 to facilitate the installation of a pre-embedded nut before rotational molding.

[0033] The utility model discloses a pollution discharge port structure of a rotational molding urea tank, which is characterized in that a stainless steel base body is embedded in an aluminum alloy sleeve. The pollution discharge port structure is welded to the alloy rotational molding urea tank without the need for a positioning device, and the welding is firm. After rotational molding, the rotational molding layer is embedded in the annular groove of the pollution discharge port, and is wrapped up and down. The upper and lower bosses wrap the plastic layer at the pollution discharge port in the middle, so that the rotational molding layer does not separate, is easy to assemble, can be used on different rotational molding urea tanks, and meets the performance requirements of the rotational molding urea tank. The pollution discharge port structure of the rotational molding urea tank simplifies the pollution discharge port rotational molding tooling and cancels the positioning device in the tooling design of the rotational molding urea tank, and there is no powder leakage during rotational molding. After rotational molding, the rotational molding urea tank has the effects of preventing cracking, peeling and delamination, and preventing liquid leakage during use.

[0034] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A rotomolded urea tank, comprising a tank body, a drain outlet, and a filling outlet; the tank body has a first assembly hole at its bottom and a second assembly hole at its top; the filling outlet is assembled into the second assembly hole of the tank body; characterized in that: The drain outlet is located at the bottom of the box body and is welded to the first assembly hole. The drain outlet includes a base and an aluminum alloy sleeve. The base is a cylindrical structure with internal threads, and an annular groove is provided on the upper outer periphery; The aluminum alloy sleeve is shorter than the base body and is fitted with a transition fit below the annular groove on the lower outer periphery of the base body, and is welded and fixed to the box body; The connection between the drain outlet and the first assembly hole is covered with a rotational molding layer.

2. The rotomolded urea tank as described in claim 1, characterized in that: The base is made of stainless steel and has a step formed by a circumferential indentation from the bottom end upwards at the bottom. The lower end of the aluminum alloy sleeve has an inner convex ring, which matches and cooperates with the step of the base body for positioning.

3. The rotomolded urea tank as described in claim 1, characterized in that: The filling port includes a metal cylinder, a top flange, and a retaining ring; The cylindrical body is used to fix the upper cover flange and the fixing retaining ring, and is obliquely assembled on the box body; The upper cover flange is fixed to the top of the cylinder, concentric with the cylinder, and its top surface extends beyond the edge of the cylinder for sealing welding. The retaining ring is installed inside the lower end of the cylinder and is concentric with the cylinder.

4. The rotomolded urea tank as described in claim 3, characterized in that: The retaining ring is 25-30mm away from the top surface of the upper cover flange.

5. A rotomolded urea tank drain outlet, characterized in that: The sewage outlet includes a base and an aluminum alloy sleeve; The base is a cylindrical structure with internal threads, and an annular groove is provided on the upper outer periphery; The aluminum alloy sleeve is fitted onto the outside of the base body, below the annular groove, and is welded and fixed to the body of the urea tank.

6. The drain outlet of the rotomolded urea tank as described in claim 5, characterized in that: The base is made of stainless steel and has a step formed by a circumferential indentation from the bottom end upwards at the bottom. The lower end of the aluminum alloy sleeve has an inner convex ring, which matches and cooperates with the step of the base body for positioning.

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