A roll-molding oil tank leak-proof joint insert structure
By employing a combination of nested structures, screw plugs, floating rings, and double sealing rings at the oil inlet and outlet of the rotomolded oil tank, the leakage problem of the rotomolded oil tank is solved, achieving a simple double sealing effect and good leak-proof performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU HENGJIU ROTATIONAL PLASTIC PROD CO LTD
- Filing Date
- 2025-09-19
- Publication Date
- 2026-07-21
AI Technical Summary
Rotomolded oil tanks are prone to leakage at the oil inlet and outlet ports. Existing gaskets are difficult to compress evenly during use, resulting in poor sealing or damage to the gaskets.
It adopts a combination structure of nesting, screw plug, floating ring, first sealing ring and second sealing ring. Double sealing is achieved by tightening the screw plug, and the deformation characteristics of the floating ring are used to ensure the sealing effect.
While achieving ease of operation, it also improves the leak-proof performance of the rotomolded oil tank, ensuring the stability and durability of the sealing effect.
Smart Images
Figure CN224533454U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rotomolded fuel tanks, and in particular to a rotomolded fuel tank leak-proof joint insert structure. Background Technology
[0002] In order to control the oil inlet and outlet of the rotational molding oil tank, a screw plug is used for sealing. Therefore, it is necessary to machine a corresponding threaded hole to facilitate the installation and removal of the screw plug.
[0003] During the use of rotomolded oil tanks, varying degrees of oil seepage or leakage often occur at the oil inlet and outlet. To solve the leakage problem at the oil inlet and outlet, various sealing gaskets can be added to the screw plug. After the screw plug is installed, the screw plug head and the outer wall of the rotomolded oil tank compress and seal the sealing gasket, thus preventing leakage at the oil inlet and outlet.
[0004] The sealing gasket only seals the area between the plug head and the outer wall of the rotomolded oil tank. During use, oil can still enter the gap between the threaded hole and the plug, requiring a high degree of structural stability from the gasket. However, the gasket is elastic, making it difficult to control the pressure applied during tightening of the plug head. Insufficient pressure will result in a failure to seal, while excessive pressure can damage the gasket and also prevent a proper seal. Therefore, improvements are needed. Utility Model Content
[0005] The main technical problem solved by this utility model is to provide a rotomolded oil tank leak-proof connector insert structure, which improves the ease of operation and ensures the leak-proof effect.
[0006] To solve the above-mentioned technical problems, the present invention provides a technical solution: a rotomolded oil tank leak-proof connector insert structure, comprising: a nest, a screw plug, a floating ring, a first sealing ring, and a second sealing ring. The rotomolded oil tank connector is provided with an inlet / outlet hole corresponding to the nest. The nest is concentrically disposed in the inlet / outlet hole. The nest has a threaded hole extending downwards. A positioning ring is disposed at the bottom of the threaded hole. The floating ring is disposed in the threaded hole and above the positioning ring. The screw plug is disposed in the threaded hole and above the floating ring. The first sealing ring is disposed at the bottom of the floating ring, and the second sealing ring is disposed at the top of the floating ring.
[0007] In a preferred embodiment of the present invention, the top edge of the nested structure is provided with a first retaining ring extending to the outer wall of the rotomolded oil tank.
[0008] In a preferred embodiment of the present invention, the nested bottom edge is provided with a second retaining ring extending into the inner wall of the rotomolded oil tank.
[0009] In a preferred embodiment of this utility model, the nesting, positioning ring, first retaining ring and second retaining ring adopt an integrated steel structure.
[0010] In a preferred embodiment of the present invention, the bottom of the floating ring is recessed and provided with a first annular groove corresponding to the first sealing ring.
[0011] In a preferred embodiment of the present invention, the first sealing ring is disposed in the first annular groove, and the bottom of the first sealing ring protrudes from the bottom surface of the floating ring.
[0012] In a preferred embodiment of the present invention, the top of the floating ring is recessed and provided with a second annular groove corresponding to the second sealing ring.
[0013] In a preferred embodiment of the present invention, the second sealing ring is disposed in the second annular groove, and the top of the second sealing ring protrudes from the top surface of the floating ring.
[0014] The beneficial effects of this utility model are as follows: The rotomolded oil tank leak-proof connector insert structure disclosed in this utility model involves the compression of the first sealing ring and the second sealing ring during the tightening of the screw plug. When the first sealing ring and the second sealing ring deform and retract into the floating ring, the screw plug contacts the end face of the floating ring, achieving end face contact sealing. The first sealing ring and the second sealing ring are used to ensure the sealing effect. The operation is simple, with double sealing and good leak-proof effect. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:
[0016] Figure 1 This is a schematic diagram of a preferred embodiment of the rotomolded oil tank leak-proof connector insert structure of this utility model;
[0017] Figure 2 yes Figure 1 Exploded view. Detailed Implementation
[0018] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0019] Please see Figures 1-2The embodiments of this utility model include:
[0020] like Figure 1 and Figure 2 The shown rotomolded oil tank leak-proof connector insert structure is used to prevent leakage at the joint of the rotomolded oil tank 1. It includes: a nest 3, a screw plug 4, a floating ring 2, a first sealing ring 5, and a second sealing ring 6. The joint of the rotomolded oil tank 1 is provided with an oil inlet / outlet hole 11 corresponding to the nest 3. The nest 3 is concentrically arranged in the oil inlet / outlet hole 11. During the rotomolding production of the oil tank, the nest 3 is first placed into the mold, and after rotomolding, the nest 3 is fixed, and the structure is stable.
[0021] In this embodiment, the top edge of the nest 3 is provided with a first retaining ring 32 extending to the outer wall of the rotomolded oil tank 1, and the bottom edge of the nest 3 is provided with a second retaining ring 31 extending to the inner wall of the rotomolded oil tank 1, which improves the axial stability of the nest 3, and the combination of the first retaining ring 32 and the second retaining ring 31 with the rotomolded oil tank 1 improves the leak-proof performance of the outer wall of the nest 3.
[0022] like Figure 2 As shown, a threaded hole 33 extending from top to bottom is provided in the nest 3 to facilitate the installation and removal of the screw plug 4. A positioning ring 34 is provided in the nest 3 at the bottom of the threaded hole 33. In this embodiment, the nest 3, the positioning ring 34, the first retaining ring 32 and the second retaining ring 31 adopt an integrated steel structure, which has high strength and good durability.
[0023] like Figure 1 As shown, the floating ring 2 is set in the threaded hole 33 and above the positioning ring 34, and the screw plug 4 is set in the threaded hole 33 and above the floating ring 2. The floating ring 2 is pressed down by tightening the screw plug 4. The upper and lower end surfaces of the floating ring 2 have high smoothness, which can achieve end face contact sealing and realize the first seal.
[0024] The first sealing ring 5 is placed at the bottom of the floating ring 2, and the second sealing ring 6 is placed at the top of the floating ring 2. The first sealing ring 5 and the second sealing ring 6 form a second seal on the end face, providing a double seal and good leak prevention effect.
[0025] like Figure 2 As shown, the bottom of the floating ring 2 is recessed and has a first annular groove 21 corresponding to the first sealing ring 5. The first sealing ring 5 is disposed in the first annular groove 21, and the bottom of the first sealing ring 5 protrudes from the bottom surface of the floating ring 2. When the first sealing ring 5 is compressed, it elastically deforms and retracts into the first annular groove 21, which prevents leakage and avoids the problem of damage to the first sealing ring 5 due to excessive force.
[0026] A second annular groove 22 corresponding to the second sealing ring 6 is recessed in the top of the floating ring 2. In this embodiment, the second sealing ring 6 is disposed in the second annular groove 22, and the top of the second sealing ring 6 protrudes from the top surface of the floating ring 2. When the second sealing ring 6 is compressed, it elastically deforms and retracts into the second annular groove 22, preventing leakage while avoiding damage to the second sealing ring 6 due to excessive force, thus ensuring high stability. The floating ring 2 is made of stainless steel, which has high strength and avoids deformation due to compression.
[0027] During the tightening process of the screw plug 4, the first sealing ring 5 and the second sealing ring 6 are squeezed. When the first sealing ring 5 and the second sealing ring 6 are deformed and retracted into the floating ring 2, the screw plug 4 makes hard contact with the end face of the floating ring 2, achieving end face contact sealing, and the first sealing ring 5 and the second sealing ring 6 are used to ensure the sealing effect.
[0028] In summary, the rotomolded oil tank leak-proof connector insert structure disclosed in this utility model is easy to assemble and disassemble, and improves leak-proof performance.
[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A leak-proof joint insert structure for rotomolded fuel tanks, used for leak prevention at the joint of rotomolded fuel tanks, characterized in that, include: The rotomolded oil tank comprises a nest, a screw plug, a floating ring, a first sealing ring, and a second sealing ring. The joint of the rotomolded oil tank has an inlet / outlet hole corresponding to the nest. The nest is concentrically positioned within the inlet / outlet hole. The nest has a threaded hole extending downwards. A positioning ring is located at the bottom of the threaded hole within the nest. The floating ring is positioned within the threaded hole and above the positioning ring. The screw plug is positioned within the threaded hole and above the floating ring. The first sealing ring is located at the bottom of the floating ring, and the second sealing ring is located at the top of the floating ring.
2. The rotomolded oil tank leak-proof joint insert structure according to claim 1, characterized in that, The top edge of the nested structure is provided with a first retaining ring extending to the outer wall of the rotomolded oil tank.
3. The rotomolded oil tank leak-proof joint insert structure according to claim 2, characterized in that, The nested bottom edge is provided with a second retaining ring extending into the inner wall of the rotomolded oil tank.
4. The rotomolded oil tank leak-proof joint insert structure according to claim 3, characterized in that, The nesting, positioning ring, first retaining ring, and second retaining ring are made of integrated steel structure.
5. The rotomolded oil tank leak-proof joint insert structure according to claim 1, characterized in that, The bottom of the floating ring is recessed and has a first annular groove corresponding to the first sealing ring.
6. The rotomolded oil tank leak-proof joint insert structure according to claim 5, characterized in that, The first sealing ring is disposed in the first annular groove, and the bottom of the first sealing ring protrudes from the bottom surface of the floating ring.
7. The rotomolded oil tank leak-proof joint insert structure according to claim 1, characterized in that, The top of the floating ring is recessed and has a second annular groove corresponding to the second sealing ring.
8. The rotomolded oil tank leak-proof joint insert structure according to claim 7, characterized in that, The second sealing ring is disposed in the second annular groove, and the top of the second sealing ring protrudes from the top surface of the floating ring.