Steam end pipeline pressure balance device and method

Abstract

The present application discloses a steam end pipeline pressure balancing device and method. The steam end pipeline pressure balancing device includes an end pipeline, a balance valve, an air chamber, and an EPS molding machine arranged in sequence. The end pipeline is connected to the balance valve, the balance valve is connected to the air chamber through a first pipeline, the air chamber and the EPS molding machine are connected through a second pipeline, a first solenoid valve is arranged on the second pipeline, the air chamber and the balance valve are also connected through a third pipeline, a second solenoid valve is arranged on the third pipeline, a pressure detection module is arranged in the air chamber, and a control module is further included. The first solenoid valve, the second solenoid valve, the balance valve, and the pressure detection module are respectively electrically connected to the control module. The steam in the steam end pipeline is pressure-regulated through the balance valve, the steam regulated by air pressure enters the air chamber, and then enters the EPS molding machine, reducing the fluctuation of the steam air pressure and providing steam with stable air pressure for the EPS molding machine.

Description

Technical Field

[0001] The present invention generally relates to the field of foam board production and processing, and particularly relates to a steam end pipeline pressure balancing device and method. Background Art

[0002] Expandable Polystyrene (EPS), whose chemical name is polystyrene and styrene copolymer, is a substance formed by mixing resin, physical foaming agent and other additives in a certain proportion. Foam plastic products are mainly manufactured by an EPS molding machine. EPS pellet raw materials are foamed by a pre-expander inside it and then dried and matured, etc. After relevant treatments, they are sent into a molding cavity. Subsequently, steam needs to be introduced and the steam pressure in the cavity needs to be maintained to ensure the smooth completion of the heating process. After the foaming and heat preservation sintering process, the EPS foam has been initially formed. After sewage discharge, cooling and shaping, corresponding board products can be made.

[0003] Heating is a crucial step in the EPS molding process. Whether the heating process is smooth is related to whether a fully fused product can be obtained. The heating process can be generally summarized as follows: Small holes for steam passage are provided on the cavity wall in advance. High-temperature steam enters the cavity from the air chamber behind the cavity and heats the beads. During this process, the air pressure in the cavity needs to be maintained at a certain value all the time and reach the maximum value when the beads are completely melted. After heating is completed, as the steam supply stops and the exhaust process starts, the pressure in the mold gradually decreases. Due to the uncertainty in the steam transportation process, the pressure at the steam end is not stably balanced, which easily leads to situations such as poor EPS heating and molding, affecting product quality. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a steam end pipeline pressure balancing device and method.

[0005] In a first aspect, the steam end pipeline pressure balancing device of the present invention includes an end pipeline, a balance valve, an air chamber and an EPS molding machine arranged in sequence. The end pipeline is connected to the balance valve. The balance valve is connected to the air chamber through a first pipeline. The air chamber and the EPS molding machine are connected through a second pipeline. A first solenoid valve is provided on the second pipeline. The air chamber and the balance valve are also connected through a third pipeline. A second solenoid valve is provided on the third pipeline. A pressure detection module is arranged in the air chamber. The device further includes a control module. The first solenoid valve, the second solenoid valve, the balance valve and the pressure detection module are respectively electrically connected to the control module.

[0006] In a second aspect, the steam end pipeline pressure balancing method of the present invention, which applies the steam end pipeline pressure balancing device, includes the following steps:

[0007] The pressure detection module obtains the real-time pressure value of the air chamber and transmits the real-time pressure value to the control module;

[0008] The control module compares the real-time pressure value with the preset pressure value range. If the real-time pressure value is within the preset pressure value range, the first solenoid valve is opened and the second solenoid valve is closed, and the steam in the air chamber enters the EPS molding machine through the second pipeline.

[0009] If the real-time pressure value is outside the preset pressure value range, the second solenoid valve is opened and the first solenoid valve is closed, and the steam in the air chamber enters the balance valve through the third pipeline.

[0010] According to the technical solution provided by the embodiment of the present application, the balance valve adjusts the pressure of the steam at the end of the steam pipeline. The steam with adjusted air pressure enters the air chamber and then enters the EPS molding machine, reducing the fluctuation of the steam pressure and providing steam with stable air pressure for the EPS molding machine.

[0011] The pressure detection module can monitor the real-time pressure value of the air chamber. If the real-time pressure value is outside the preset pressure value range, the second solenoid valve is opened and the first solenoid valve is closed, and the steam in the air chamber enters the balance valve through the third pipeline. The balance valve then adjusts the pressure of the steam until the real-time pressure value of the air chamber is within the preset pressure value range; if the real-time pressure value is within the preset pressure value range, the first solenoid valve is opened and the second solenoid valve is closed, and the steam in the air chamber enters the EPS molding machine through the second pipeline, providing steam with stable pressure for the EPS molding machine, and solving the problem of poor heating and molding of the EPS molding machine caused by unstable steam. Brief Description of the Drawings

[0012] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects and advantages of the present application will become more apparent:

[0013] Figure 1 It is a schematic structural diagram of the steam end pipeline pressure balance device of the embodiment of the present invention. Detailed Embodiments

[0014] The present application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention and are not intended to limit the invention. Additionally, it should be noted that for the sake of description, only the parts related to the invention are shown in the drawings.

[0015] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0016] One embodiment of the present invention is as follows. Please refer to Figure 1 , a steam end pipeline pressure balancing device, which includes an end pipeline 100, a balancing valve 200, an air chamber 300, and an EPS molding machine 400 arranged in sequence. The end pipeline 100 is connected to the balancing valve 200. The balancing valve 200 is connected to the air chamber 300 through a first pipeline 500. The air chamber 300 and the EPS molding machine 400 are connected through a second pipeline 600. A first solenoid valve 610 is arranged on the second pipeline 600. The air chamber 300 and the balancing valve 200 are also connected through a third pipeline 700. A second solenoid valve 710 is arranged on the third pipeline 700. A pressure detection module is arranged in the air chamber 300. It further includes a control module 800. The first solenoid valve 610, the second solenoid valve 710, the balancing valve 200, and the pressure detection module are respectively electrically connected to the control module 800.

[0017] In the embodiment of the present invention, the end pipeline 100 is the end of the pipeline provided with steam by the steam manufacturer near the factory. After the steam is transported through a long-distance pipeline, there is a situation of unstable pressure. The steam in the end pipeline 100 first passes through the balancing valve 200. The balancing valve 200 adjusts the pressure of the steam in the steam end pipeline 100. The steam with adjusted air pressure enters the air chamber 300 and then enters the EPS molding machine 400, reducing the fluctuation of the steam pressure and providing steam with stable air pressure for the EPS molding machine 400. The air chamber 300 is independent of the EPS molding machine 400 and can temporarily store the steam. By controlling the on-off of the first solenoid valve 610, the on-off of the second pipeline 600 is controlled. If the first solenoid valve 610 is in the open state, the steam in the air chamber 300 can enter the EPS molding machine 400 through the second pipeline 600. If the first solenoid valve 610 is in the closed state, the steam in the air chamber 300 cannot enter the EPS molding machine 400 through the second pipeline 600. By controlling the on-off of the second solenoid valve 710, the on-off of the third pipeline 700 is controlled. If the second solenoid valve 710 is in the open state, the steam in the air chamber 300 can enter the balancing valve 200 through the third pipeline 700. If the second solenoid valve 710 is in the closed state, the steam in the air chamber 300 cannot enter the balancing valve 200 through the third pipeline 700.

[0018] The pressure detection module can monitor the real-time pressure value of the air chamber 300. If the real-time pressure value is outside the preset pressure value range, the second solenoid valve 710 is opened and the first solenoid valve 610 is closed. The steam in the air chamber 300 enters the balance valve 200 through the third pipeline 700, and the balance valve 200 adjusts the pressure of the steam until the real-time pressure value of the air chamber 300 is within the preset pressure value range. If the real-time pressure value is within the preset pressure value range, the first solenoid valve 610 is opened and the second solenoid valve 710 is closed. The steam in the air chamber 300 enters the EPS molding machine 400 through the second pipeline 600, providing steam with stable pressure for the EPS molding machine 400 and solving the problem of poor heating and molding of the EPS molding machine 400 caused by unstable steam. The air chamber 300 is used to temporarily store the steam, and it is determined that the real-time pressure value of the steam is within the preset pressure value range before the steam is transported to the EPS molding machine 400 through the second pipeline 600.

[0019] Another embodiment of the present invention is a method for balancing the pressure of the steam end pipeline, which is applied to the steam end pipeline pressure balancing device and includes the following steps: The pressure detection module obtains the real-time pressure value of the air chamber 300 and transmits the real-time pressure value to the control module 800. The control module 800 compares the real-time pressure value with the preset pressure value range. If the real-time pressure value is within the preset pressure value range, the first solenoid valve 610 is opened and the second solenoid valve 710 is closed, and the steam in the air chamber 300 enters the EPS molding machine 400 through the second pipeline 600. If the real-time pressure value is outside the preset pressure value range, the second solenoid valve 710 is opened and the first solenoid valve 610 is closed, and the steam in the air chamber 300 enters the balance valve 200 through the third pipeline 700.

[0020] In an embodiment of the present invention, the end pipeline 100 is the end of the pipeline that supplies steam to the steam manufacturer near the factory. After the steam is transported through a long-distance pipeline, the pressure is unstable. The steam in the end pipeline 100 first passes through the balance valve 200. The balance valve 200 adjusts the pressure of the steam in the end pipeline 100 of the steam. The steam whose pressure is adjusted enters the air chamber 300 and then enters the EPS molding machine 400, reducing the fluctuation of the steam pressure and providing the EPS molding machine 400 with steam with stable pressure. The air chamber 300 is independent of the EPS molding machine 400 and can temporarily store steam. By controlling the on-off of the first solenoid valve 610, the on-off of the second pipeline 600 is controlled. If the first solenoid valve 610 is in the open state, the steam in the air chamber 300 can enter the EPS molding machine 400 through the second pipeline 600. If the first solenoid valve 610 is in the closed state, the steam in the air chamber 300 cannot enter the EPS molding machine 400 through the second pipeline 600. By controlling the on-off of the second solenoid valve 710, the on-off of the third pipeline 700 is controlled. If the second solenoid valve 710 is in the open state, the steam in the air chamber 300 can enter the balance valve 200 through the third pipeline 700. If the second solenoid valve 710 is in the closed state, the steam in the air chamber 300 cannot enter the balance valve 200 through the third pipeline 700.

[0021] The pressure detection module can monitor the real-time pressure value of the air chamber 300. If the real-time pressure value is outside the preset pressure value range, the second solenoid valve 710 is opened and the first solenoid valve 610 is closed. The steam in the air chamber 300 enters the balance valve 200 through the third pipeline 700, and the balance valve 200 adjusts the pressure of the steam again until the real-time pressure value of the air chamber 300 is within the preset pressure value range; if the real-time pressure value is within the preset pressure value range, the first solenoid valve 610 is opened and the second solenoid valve 710 is closed. The steam in the air chamber 300 enters the EPS molding machine 400 through the second pipeline 600, providing the EPS molding machine 400 with steam with stable pressure and solving the problem of poor heating and molding of the EPS molding machine 400 caused by unstable steam. The steam is temporarily stored through the air chamber 300, and it is determined that the real-time pressure value of the steam is within the preset pressure value range before the steam is transported to the EPS molding machine 400 through the second pipeline 600.

[0022] Further, the preset pressure value range is 0.08 - 0.15 MPa.

[0023] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solution formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

1. A method for pressure balance of a steam end pipeline, characterized in that, It includes an end pipeline, a balance valve, an air chamber and an EPS molding machine which are arranged in sequence. The end pipeline is connected to the balance valve. The balance valve is connected to the air chamber through a first pipeline. The air chamber and the EPS molding machine are connected through a second pipeline. A first solenoid valve is arranged on the second pipeline. The air chamber and the balance valve are also connected through a third pipeline. A second solenoid valve is arranged on the third pipeline. A pressure detection module is arranged in the air chamber. It further includes a control module. The first solenoid valve, the second solenoid valve, the balance valve and the pressure detection module are respectively electrically connected to the control module; It includes the following steps: The pressure detection module obtains the real-time pressure value of the air chamber and transmits the real-time pressure value to the control module; The control module compares the real-time pressure value with the preset pressure value range. If the real-time pressure value is within the preset pressure value range, the first solenoid valve is opened and the second solenoid valve is closed. The steam in the air chamber enters the EPS molding machine through the second pipeline. If the real-time pressure value is outside the preset pressure value range, the second solenoid valve is opened and the first solenoid valve is closed. The steam in the air chamber enters the balance valve through the third pipeline; The preset pressure value range is 0.08~0.15MPa.

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