US-12623419-B2 - Insulation foaming structure and method for a tank container

US12623419B2US 12623419 B2US12623419 B2US 12623419B2US-12623419-B2

Abstract

A tank container insulation foaming structure comprising a press molding module and a clamping fixation module for securing the press molding module; the press molding module comprises a flat plate that connects with the tank container, an arc plate provided on the flat plate, and a connection plate for connecting the flat plate with the arc plate; a foaming space is formed between the arc plate and the tank container; the clamping fixation module comprises a fixed frame for securing the flat plate, a compression rod for fastening the fixed frame, and connecting components that connect the compression rod with the tank container; the fixed frame is connected to the press molding module and fastens the fixing frame to the tank container by the compression rod, the compression rod is connected to the tank container through connecting components; the foaming space has an insulating layer formed by the foaming material.

Inventors

Hongfei GU
Xiaobo He

Assignees

NANTONG TANK CONTAINER CO., LTD.
SQUARE TECHNOLOGY GROUP CO., LTD

Dates

Publication Date: 20260512
Application Date: 20231218
Priority Date: 20230918

Claims (7)

1 . A tank container insulation foaming method comprising the following steps: providing an apparatus for forming a tank container insulation foaming material, the apparatus comprising: a press molding module for foaming; and a clamping fixation module for securing the press molding module; wherein the press molding module comprises a flat plate that connects with the tank container, an arc plate provided on the flat plate, and a connection plate used to connect the flat plate with the arc plate, wherein a foaming space is formed between the arc plate and the tank container; and wherein the clamping fixation module comprises a fixed frame for securing the flat plate, a compression rod for fastening the fixed frame, and connecting components that connect the compression rod with the tank container; and thereafter (S1) pasting tin foil paper to a front end cap and a rear end cap of the tank container, using a sealing glue to adhere to respective contact surface of the front and rear end caps and the tin foil paper, extending the tin foil paper towards an inside of a neck ring of the tank container; (S2) placing a plastic film on an outer surface of the front and rear end caps, connecting the apparatus to both end frames of the tank container; (S3) providing a hole for injecting the foaming material at a position on a top of the neck ring away from a weld seam of the tank container; (S4) calculating a time required to inject the foaming material based on a volume of the foaming space, a density of an insulation layer to be formed by foaming, and a predetermined pouring speed; (S5) injecting the foaming material into the apparatus; (S6) performing foaming for a preset time, and then removing the apparatus; (S7) checking a quality and an appearance of the insulation layer; (S8) installing fiberglass end cap outer plates on the insulation layer, uniforming gaps among edges of the outer plates, the end frames of the tank container, and outer supports of the tank container; (S9) drilling rivet holes from a center of a straight edge of each outer plate toward edges of the same outer plate to enable the outer plate to be free of waves and wrinkles; (S10) using the sealing glue to bond the outer plates to the tank container.
2 . The tank container insulation foaming method according to claim 1 , wherein in step S4, t=(V_body*ρ)/v_speed; where t is the time required to inject the foaming material; where V_body is the volume of the foaming space; where ρ is the density of the insulation layer; where v_speed is the predetermined pouring speed.
3 . The tank container insulation foaming method according to claim 2 , wherein in step S4, when the room temperature is below 0° C., the v_speed is 1.9 kg/s; when a room temperature is between 0° C. and 30° C., the v_speed is 2 kg/s; and when the room temperature exceeds 30° C., the v_speed is 2.1 kg/s.
4 . The tank container insulation foaming method according to claim 1 , wherein in step S2, before connecting the apparatus to the end frames of the tank container, a release agent is applied inside the foaming space of the apparatus.
5 . The tank container insulation foaming method according to claim 1 , wherein in step S5, the foaming material is a mixture of combined polyether and isocyanate.
6 . The tank container insulation foaming method according to claim 5 , wherein a ratio of combined polyether to isocyanate is 1:1.2.
7 . The tank container insulation foaming method according to claim 1 , wherein in step S6, at room temperatures above 20° C., the preset time is 90 minutes; at temperatures at or below 20° C., the preset time is 120 minutes.

Description

TECHNICAL FIELD The present invention relates to the field of insulation technology for tank containers, and particularly to an insulation foaming structure and method for such containers. BACKGROUND Most tank container types in the current industry have thermal insulation needs. Various insulation types, such as rock wool filling and PU board laying, are used. Conventional tank containers typically use rock wool filling material for insulation, suitable for mediums insensitive to environmental temperature. This method involves wrapping sheet rock wool insulation material around the cylinder and covering it with fiberglass outside, providing insulation during conventional steam heating processes of the container. However, for containers requiring higher insulation, this method does not achieve optimal insulation effects. Foam insulation methods are used for higher insulation requirements, but the foaming process is complicated. The intense reaction of the foaming material can lift and damage the foaming mold, leading to leakage of the foaming material and inadequate insulation of the tank. SUMMARY The purpose of this invention is to solve the aforementioned issues by providing a tank container insulation foaming structure and method. To achieve the above object, the present invention provided a tank container insulation foaming structure, comprising: a press molding module for foaming; anda clamping fixation module for securing the press molding module;wherein the press molding module comprises a flat plate that connects with the tank container, an arc plate provided on the flat plate, and a connection plate used to connect the flat plate with the arc plate: a foaming space is formed between the arc plate and the tank container;wherein the clamping fixation module comprises a fixed frame for securing the flat plate, a compression rod for fastening the fixed frame, and connecting components that connect the compression rod with the tank container: the fixed frame is connected to the press molding module and fastens the fixing frame to the tank container by the compression rod, the compression rod is connected to the tank container through connecting components: the foaming space has an insulating layer formed by the foaming material. As a further improvement of the present invention, wherein the flat plate is provided with reinforcement ribs. As a further improvement of the present invention, wherein the fixed frame comprises several fixed rods arranged on the flat plate, the several fixed rods are connected end-to-end around the periphery of the flat plate. As a further improvement of the present invention, wherein the method comprising the following steps: S1. Pasting tin foil paper to the front and rear end caps of tank container, using sealing glue to adhere to the contact surface of the end cap and tin foil paper, extending the tin foil paper towards the inside of the neck ring;S2. Placing a plastic film on the outer surface of the end cap, connecting the insulation foaming structure to both the end tank container frame;S3. Providing a hole for injecting the foaming material at a position on the top of the neck ring, away from the weld seam;S4. Calculating the time required to inject the foaming material based on the volume of the foaming space, the density of the insulation layer formed by foaming, and the pouring speed;S5. Injecting the foaming material into the tank container insulation foaming structure;S6. Performing the foaming for a preset time, and then removing the tank container insulation foaming structure;S7. Checking the quality and appearance of the insulation layer;S8. Installing fiberglass end cap outer plates on the insulation layer, uniforming the gap among the edges of the outer plates and frames at both ends, as well as the outer supports;S9: Drilling rivet holes from the center of the straight edge of the outer plate towards the edges, enabling the outer panel free of waves and wrinkles;S10: Using sealing glue to bond the outer plates to the tank container. As a further improvement of the present invention, wherein in step S4, t=(V_body*ρ)/v_speed; where t is the foaming space;where V_body is Volume of the foaming space;where ρ is Density of the insulation layer;where v_speed is Pouring speed. As a further improvement of the present invention, wherein in step S4, when the room temperature is below 0° C., the pouring speed v_speed is 1.9 kg/s: when the room temperature is between 0° C. and 30° C., v_speed is 2 kg/s; and when the room temperature exceeds 30° C., v_speed is 2.1 kg/s. As a further improvement of the present invention, wherein in step S2, before connecting the tank container insulation foaming structure to the end frames, a release agent is applied inside the foaming space of the insulation foaming structure. As a further improvement of the present invention, wherein in step S5, the foaming material is a mixture of combined polyether and isocyanate. As a further improvem