An inflatable sealed plug device

Abstract

The present application relates to a kind of inflatable sealed plug board device, comprising: plug board frame, plug board, air chamber, sealing membrane, isolation valve and connecting rod;Wherein, the plug board frame is connected with flue wall, the plug board and the air chamber are arranged in the plug board frame;The plug board is controlled by the connecting rod to move up and down in plug board frame;The air chamber is hollow structure, air chamber side opening is towards plug board, is equipped with sealing membrane;The air chamber is connected with external compressed air source by the isolation valve, and the gas pressure in air chamber is controlled by the opening and closing of isolation valve.The beneficial effects of the present application are: the gas pressure of upper air chamber, lower air chamber and side air chamber of the present application can be independently controlled, and each air chamber can be independently installed in plug board frame.If a certain air chamber fails, it can be individually disassembled and repaired.The running reliability of the device is relatively high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sealed plugboard, more particularly, it relates to an inflatable sealed plugboard device. BACKGROUND

[0002] Plug-in baffle doors are widely used in many industrial fields, which play a role in isolating flue gas, and are important equipment for ensuring safety in production and process system performance. According to the functional needs of the process system, the plug-in door is often installed in harsh environments such as high dust, high temperature, high moisture, and high corrosive gas. Blockage, corrosion, deformation and other situations often occur, ultimately causing the device to jam, flue gas leakage and other failures. Reducing the service life of the device, increasing the maintenance workload of the process system equipment, and increasing the unsafe factors of the process system.

[0003] In order to improve the sealing performance and corrosion resistance of the plug-in door, the traditional plug-in door often uses stainless steel or alloy sealing materials. At the same time, the sealing material and the plug-in plate must have high processing and manufacturing precision, so as to ensure that the sealing material and the plug-in plate are tightly attached. The corresponding plug-in door manufacturing cost is high. Due to the difference in thermal expansion coefficient between the sealing material and the plug-in plate, under high temperature conditions, flue gas leakage is prone to occur due to the difference in expansion amount, and the gap between the sealing material and the plug-in plate is prone to dust accumulation, ultimately causing the plug-in plate to jam and the sealing to be not tight. SUMMARY

[0004] The purpose of the present application is to solve the problems of the prior art, and provide an inflatable sealed plugboard device.

[0005] In a first aspect, an inflatable sealed plugboard device is provided, comprising: a plugboard frame, a plug-in plate, an air chamber, a sealing film, an isolation valve and a connecting rod;

[0006] The plugboard frame is connected to the flue wall, and the plug-in plate and the air chamber are arranged in the plugboard frame. The plug-in plate is controlled by the connecting rod to move up and down in the plugboard frame. The air chamber is a hollow structure, and the side of the air chamber facing the plug-in plate is provided with an opening and is provided with a sealing film. The air chamber is connected to an external compressed air source through the isolation valve, and the gas pressure in the air chamber is controlled by opening and closing the isolation valve.

[0007] Preferably, the air chamber comprises an upper air chamber, a side air chamber and a lower air chamber which are independently arranged, and each air chamber is connected to a corresponding isolation valve. The upper air chamber is arranged on both sides of the upper part of the plug-in plate, the side air chamber is arranged on both sides of the plug-in plate, and the lower air chamber is arranged on the lower side of the plug-in plate.

[0008] Preferably, the material of the sealing film is rubber or polytetrafluoroethylene.

[0009] Preferably, the end of the connecting rod is connected to a hydraulic or electric actuator to provide thrust and tension to the connecting rod and the plug-in plate.

[0010] In a second aspect, there is provided a method for operating the gasketed damper device according to any one of the first aspect, comprising:

[0011] Step 1, put the device in the closed state: the damper is located entirely within the flue gas passage of the damper frame, open the isolation valve, and compressed air enters each air chamber through the isolation valve; the air pressure in each air chamber rises, and the sealing membrane of the air chamber expands until it is tightly attached to the side, bottom and upper part of the damper; at this time, stop increasing the pressure of the compressed air in the air chamber, and close the isolation valve;

[0012] Step 2, open the device: open the isolation valve corresponding to each air chamber, and discharge the gas in the air chamber; as the air pressure in each air chamber decreases, the sealing membrane of the air chamber contracts, the friction between the sealing membrane and the damper decreases, but still maintains the contact state, preventing flue gas from entering the upper damper frame through the gap between the damper and the sealing membrane; the damper moves upward under the action of the connecting rod, and the flue gas in the upstream flue begins to pass through the passage space between the damper and the damper frame into the downstream flue;

[0013] Step 3, put the device in the fully open state: when the damper is located entirely in the upper part of the damper frame, open the isolation valve, and compressed air enters each air chamber through the isolation valve; the air pressure in each air chamber rises, and the sealing membrane of the air chamber expands, and then stop increasing the pressure of the compressed air in the air chamber, and close the isolation valve.

[0014] As a preferred, in the step, the sealing membranes of the side air chamber and the lower air chamber, and the side air chamber and the upper air chamber are pressed against each other, and at the same time, the sealing membrane of the upper air chamber is tightly attached to the side of the damper, the gap between the damper and the damper frame is filled with the sealing membrane, and the requirement of no leakage of flue gas is met.

[0015] The beneficial effects of the present application are:

[0016] 1. The damper of the present application moves up and down in the damper frame, and its sealing performance is guaranteed by the corresponding sealing membranes of the upper air chamber, the lower air chamber and the side air chamber, which has low requirements for the manufacturing precision of the damper, and is easy to process and manufacture. The sealing membrane can be made of organic corrosion-resistant materials such as rubber or polytetrafluoroethylene, which has better corrosion resistance and lower price than stainless steel or alloy corrosion-resistant materials.

[0017] 2. The corresponding sealing membranes of the upper air chamber, the lower air chamber and the side air chamber of the present application are soft materials with high elasticity, which can be more closely and tightly attached to the damper after being inflated with the increase of internal pressure. By operating the isolation valve, the gas pressure in the air chamber is controlled, the gap between the sealing membrane and the damper is managed, and the opening and closing operations of the damper device are flexibly coordinated, which effectively prevents the leakage of flue gas during the damper is stationary and moving, and ensures that the damper has good sealing performance.

[0018] 3. The gas pressure of the upper air chamber, the lower air chamber and the side air chamber of the present application can be independently controlled, and each air chamber can be independently installed in the plug frame. If a certain air chamber fails, it can be individually disassembled and repaired. The operation reliability of the device is high. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Top view of the inflatable sealed plug device in the closed state;

[0020] Figure 2 Application scenario diagram of the inflatable sealed plug device in the closed state;

[0021] Figure 3 Top view of the inflatable sealed plug device in the opening process;

[0022] Figure 4 Application scenario diagram of the inflatable sealed plug device structure in the opening process;

[0023] Figure 5 Top view of the inflatable sealed plug device in the fully open state;

[0024] Figure 6 Application scenario diagram of the inflatable sealed plug device in the fully open state;

[0025] Explanation of reference signs: plug frame 1, plug 2, upper air chamber 3, side air chamber 4, lower air chamber 5, sealing film 6, isolation valve 7, connecting rod 8. DETAILED DESCRIPTION

[0026] The present application will be further described below in conjunction with examples. The following examples are only used to help understand the present application. It should be pointed out that for ordinary people in this technical field, without departing from the principles of the present application, several modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0027] Example 1:

[0028] An inflatable sealed plug device, comprising: a plug frame 1, a plug 2, an air chamber, a sealing film 6, an isolation valve 7 and a connecting rod 8;

[0029] The plug frame 1 is connected to the flue wall, the plug 2 and the air chamber are arranged in the plug frame 1; the plug 2 is controlled by the connecting rod 8 to move up and down in the plug frame 1; the air chamber is a hollow structure, the side facing the plug 2 is provided with a hole and is provided with a sealing film 6; the air chamber is connected to an external compressed air source through the isolation valve 7, and the gas pressure in the air chamber is controlled by opening and closing the isolation valve 7.

[0030] Specifically, when the plug 2 is all below the flue gas passage in the plug frame 1, the flue gas in the flue is blocked, and the flue gas cannot flow through, and the plug is in a closed state. When the plug 2 is all above the flue gas passage outside the plug frame 1, the flue gas in the flue can flow through the whole passage, and the plug is in a fully open state.

[0031] In addition, the sealing film 6 is composed of a thin film with good flexibility and high strength, and the material can be rubber or polytetrafluoroethylene, etc. Lightweight, high elasticity, corrosion resistance and structural strength materials.

[0032] The end of the connecting rod 8 is connected to a hydraulic or electric actuator to provide thrust and pull to the connecting rod 8 and the plug 2. The plug 2 can reciprocate in the plug frame 1 through the push-pull action of the connecting rod 8, realizing the closing and opening of the device.

[0033] Example 2:

[0034] Based on example 1, the application example 2 provides an inflatable sealing type plug device, which comprises: a plug frame 1, a plug 2, an air chamber, a sealing film 6, an isolation valve 7 and a connecting rod 8;

[0035] The plug frame 1 is connected to the flue wall, the plug 2 and the air chamber are arranged in the plug frame 1; the plug 2 is controlled by the connecting rod 8 to move up and down in the plug frame 1; the air chamber is a hollow structure, the side facing the plug 2 is provided with an opening and is provided with a sealing film 6; the air chamber is connected to an external compressed air source through the isolation valve 7, and the gas pressure in the air chamber is controlled through the opening and closing of the isolation valve 7.

[0036] The air chamber comprises an upper air chamber 3, a side air chamber 4 and a lower air chamber 5 arranged independently, and each air chamber is connected to a corresponding isolation valve 7; wherein each air chamber is connected to an external compressed air source through the isolation valve 7, and the gas pressure in the air chamber is controlled through the opening and closing of the isolation valve 7. The sealing film 6 can expand or shrink with the increase or decrease of the gas pressure in the air chamber. The upper air chamber 3 is on both sides of the upper part of the plug 2, and is two independent parts. The side air chamber 4 is on the sides of the two narrow edges of the plug 2, and is two independent parts. The lower air chamber 5 is on the lower side of the plug 2, and is a whole part. The gas pressures of the upper air chamber 3, the lower air chamber 5 and the side air chamber 4 can be independently controlled, and each air chamber can be independently installed in the plug frame 1. If a certain air chamber fails, it can be individually disassembled and repaired.

[0037] Example 3:

[0038] Based on examples 1 and 2, the application provides a working method of the inflatable sealing type plug device, which comprises:

[0039] Step 1, make the device in the closed state: the plug plate 2 is located in the flue gas passage of the plug plate frame 1, open the isolation valve 7, the compressed air enters each air chamber through the isolation valve 7; the air pressure in each air chamber rises, the sealing membrane 6 of the air chamber expands, until the sealing membrane 6 is tightly attached to the side, bottom and upper part of the plug plate 2, at this time stop increasing the compressed air pressure in the air chamber, close the isolation valve 7;

[0040] Step 2, open the device: open the isolation valve 7 corresponding to each air chamber, exhaust the gas in the air chamber; as the air pressure in each air chamber decreases, the sealing membrane 6 of the air chamber shrinks, the friction between the sealing membrane 6 and the plug plate 2 decreases, but still maintains the contact state, preventing the flue gas from entering the upper plug plate frame 1 through the gap between the plug plate 2 and the sealing membrane 6; the plug plate 2 is driven by the connecting rod 8 to move upward, the flue gas in the upstream flue begins to pass through the passage space between the plug plate 2 and the plug plate frame 1 into the downstream flue;

[0041] Step 3, make the device in the fully open state: when the plug plate 2 is located in the upper part of the plug plate frame 1, open the isolation valve 7, the compressed air enters each air chamber through the isolation valve 7; the air pressure in each air chamber rises, the sealing membrane 6 of the air chamber expands, and then stop increasing the compressed air pressure in the air chamber, close the isolation valve 7.

[0042] In step 3, the sealing membranes 6 of the side air chamber 4 and the lower air chamber 5, and the side air chamber 4 and the upper air chamber 3 are pressed and tightly attached to each other, at the same time, the sealing membrane 6 of the upper air chamber 3 is tightly attached to the side of the plug plate 2, the gap between the plug plate 2 and the plug plate frame 1 is filled with the sealing membrane, meeting the requirement of no flue gas leakage. In addition, the sealing membranes 6 of the lower air chamber 5 and the side air chamber 4 are tightly attached to each other, eliminating the dead angle between the air chambers, which can effectively prevent liquid and dust deposition.

Claims

1. A method for operating an inflatable sealing insert device, characterized in that, The inflatable sealing insert device includes: insert frame (1), insert (2), air chamber, sealing membrane (6), isolation valve (7) and connecting rod (8); The insert frame (1) is connected to the flue wall, and the insert plate (2) and the air chamber are arranged inside the insert frame (1). The insert plate (2) is controlled to move up and down inside the insert frame (1) by the connected connecting rod (8). The air chamber is a cavity structure with an opening on the side of the air chamber facing the insert plate (2) and is equipped with a sealing membrane (6). The air chamber is connected to an external compressed air source through the isolation valve (7), and the gas pressure in the air chamber is controlled by opening and closing the isolation valve (7). The air chamber includes an upper air chamber (3), a side air chamber (4) and a lower air chamber (5) that are set independently, and each air chamber is connected to a corresponding isolation valve (7). The upper air chamber (3) is on the upper two sides of the insert plate (2), the side air chamber (4) is on the two sides of the insert plate (2), and the lower air chamber (5) is on the lower side of the insert plate. include: Step 1: Put the device in the closed state: The insert plate (2) is completely located in the flue gas passage of the insert plate frame (1). Open the isolation valve (7) and the compressed air enters each gas chamber through the isolation valve (7). The air pressure in each gas chamber increases and the sealing membrane (6) of the gas chamber expands until the sealing membrane (6) is tightly attached to the side, bottom and top of the insert plate (2). At this time, stop increasing the compressed air pressure in the gas chamber and close the isolation valve (7). Step 2, Activate the device: Open the isolation valve (7) corresponding to each gas chamber to discharge the gas in the gas chamber; as the gas pressure in each gas chamber decreases, the sealing membrane (6) of the gas chamber contracts, the friction between the sealing membrane (6) and the insert plate (2) decreases, but still maintains contact, preventing the flue gas from entering the upper insert plate frame (1) through the gap between the insert plate (2) and the sealing membrane (6); the insert plate (2) moves upward under the drive of the connecting rod (8), and the flue gas in the upstream flue begins to enter the downstream flue through the channel space between the insert plate (2) and the insert plate frame (1); Step 3: Put the device in the fully open state: When the insert plate (2) is completely located on the upper part of the insert plate frame (1), open the isolation valve (7), and the compressed air enters each air chamber through the isolation valve (7); the air pressure in each air chamber increases, the sealing membrane (6) of the air chamber expands, then stop increasing the compressed air pressure in the air chamber and close the isolation valve (7).

2. The operating method of the inflatable sealing insert device according to claim 1, characterized in that, The sealing membrane (6) is made of rubber or polytetrafluoroethylene.

3. The working method of the inflatable sealing insert device according to claim 2, characterized in that, The end of the link (8) is connected to a hydraulic or electric actuator to provide thrust and pull to the link (8) and the insert (2).

4. The operating method of the inflatable sealing insert device according to claim 1, characterized in that, In step 3, the sealing membranes (6) of the side chamber (4) and the lower chamber (5), and the side chamber (4) and the upper chamber (3) are pressed tightly against each other. At the same time, the sealing membrane (6) of the upper chamber (3) is pressed tightly against the side of the insert plate (2). The gap between the insert plate (2) and the insert plate frame (1) is filled with the sealing membrane, so as to achieve the requirement of no flue gas leakage.

Images