Industrial silicon large cloth bag industry valve plate system sealing structure

Abstract

The utility model relates to an industry silicon big cloth bag industry valve plate system sealing structure, including the steel structure base that surface is equipped with the valve port and the close valve plate that can move up and down, the bottom of close valve plate is equipped with the annular ring that extends downward, the corresponding position of steel structure base is equipped with the annular steel plate that protrudes upward, the annular steel plate sets up two, the inside annular steel plate is fixed on the inner wall of valve port, the outside annular steel plate is welded and fixed on the surface of steel structure base, and the upper end surface between two annular steel plates and steel structure base forms the annular groove that surrounds, and the annular groove is inlayed with the silica gel sponge sealing strip, the utility model discloses when the valve plate system closes, the annular ring of valve plate bottom presses into the silica gel sponge sealing strip in lower annular groove, and the silica gel sponge sealing strip material is relatively soft, forms the elastic sealing, and high temperature does not deform, can guarantee the valve plate system sealing when pressing, ensures not to leak, avoids the hard contact of valve plate and base simultaneously, prevents the deformation, improves practicality.

Description

Technical Field

[0001] This utility model relates to the technical field of industrial dust removal equipment, specifically a sealing structure for a valve plate system in the industrial silicon large filter bag industry. Background Technology

[0002] The flue gas generated during industrial silicon smelting is characterized by high temperature, high corrosivity, high dust viscosity, fine dust particles, and strong abrasiveness. Currently, large bag filters are widely used in this industry for flue gas purification. One of its core components is the valve plate system for air outlet, air inlet, and ash conveying. This system is numerous and operates frequently, so the sealing connection structure of the valve plate system is crucial.

[0003] In existing technologies, the common connection method is to directly press the valve plate steel plate onto the steel structure base. This structure has the following significant drawbacks: 1. Rigid connection, poor sealing: In the original structure, the steel plate and the valve plate are in direct contact. Due to the large direct contact, the plates are rigidly connected, resulting in poor sealing and deformation.

[0004] 2. Frequent switching and severe deformation: The large bag filter valve system in industrial silicon is a component that is frequently switched on and off. There are many of them, about 100 to 120 per dust collector. During the ash conveying and cleaning process, the valve plates are frequently switched on and off, resulting in severe deformation due to hard contact. This leads to problems such as poor sealing, poor ash conveying and cleaning effect, and high dust collector resistance.

[0005] Therefore, there is an urgent need for a new sealing structure that is more reliable, has higher strength, and is suitable for the harsh conditions of industrial silicon. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a sealing structure for a valve plate system in the industrial silicon bag industry, which solves problems such as poor valve plate sealing, air leakage, and high resistance during the back-blowing process, ensuring reduced energy consumption and dust emissions meeting standards.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sealing structure for a valve plate system in the industrial silicone bag industry, comprising a steel structure base with a valve port on its surface and a movable closing valve plate. The bottom of the closing valve plate has a downward-extending annular ring, and the corresponding position on the steel structure base has an upward-protruding annular steel plate. Two annular steel plates are provided; the inner annular steel plate is fitted and fixed to the inner wall of the valve port, and the outer annular steel plate is welded and fixed to the surface of the steel structure base. The two annular steel plates and the upper end face of the steel structure base form an annular groove. A silicone rubber sponge sealing strip is embedded in the annular groove. The silicone rubber sponge sealing strip is bonded and fixed to the bottom or side wall surface of the annular groove with neutral silicone adhesive. An air bladder is provided inside the silicone rubber sponge sealing strip. When the closing valve plate is closed, the annular ring first presses the middle area of ​​the sealing strip and further squeezes the air bladder, triggering internal gas redistribution, thereby achieving dynamic adaptive sealing.

[0008] Furthermore, the airbag component includes two symmetrically arranged airbag rings and a connecting part located between the two airbag rings. The connecting part is positioned directly opposite the downward pressing position of the annular ring. When the annular ring moves downward and presses the connecting part, the pressure on the connecting part causes the internal gas to flow to the airbag rings on both sides, causing the airbag rings to expand and bulge. This causes the surrounding silicone rubber sponge sealing strip to locally bulge and deform, enhancing the tight fit with the sides of the inner and outer annular steel plates. This forms a linkage sealing mechanism where the center is compressed and the sides expand, effectively compensating for processing errors and assembly gaps.

[0009] Furthermore, the airbag component is a hollow, closed elastic capsule structure, made of high-temperature resistant silicone or fluororubber, which can maintain good airtightness and resilience in high-temperature environments of 250℃~300℃. The airbag component is made of high-temperature resistant silicone or fluororubber, and the cross-section of the connecting part is rectangular or arc-shaped protrusion. When the annular ring squeezes the connecting part, the gas enters the airbag rings on both sides, which has high compressive rigidity, can concentrate the pressure transmission and quickly start the gas transfer process.

[0010] To prevent the silicone rubber sponge sealing strip from falling off due to vibration or thermal stress during use, this utility model is equipped with two anti-detachment clamping structures: Preferably, the top of the annular steel plate is provided with a bend, which is used to fix the silicone rubber sponge sealing strip.

[0011] Furthermore, the bending part includes a striking part set on the top of the annular steel plate. The striking part bends towards the center of the annular groove, so that the annular groove forms a trapezoidal contraction structure that is narrow at the top and wide at the bottom, thereby clamping and fixing the silicone rubber sponge sealing strip and preventing it from moving out axially.

[0012] Furthermore, the bending section includes L-shaped retaining strips symmetrically distributed on the top of the two annular steel plates. The L-shaped retaining strips are arranged in a ring array and form an L-shaped snap-fit ​​structure, thereby covering and locking the upper edge of the silicone rubber sponge sealing strip in the annular groove. After the sealing strip is installed, it is bent radially inward by a pressure roller or hammer at 90° to 120° to form an L-shaped snap-fit ​​structure, thereby covering and locking the upper edge of the silicone rubber sponge sealing strip in the annular groove and providing stable mechanical constraint.

[0013] Furthermore, the silicone rubber sponge sealing strip has a closed-cell foam structure, which has low water absorption and excellent compression resilience. The neutral silicone sealant is a two-component high-temperature resistant sealant with a shear strength of not less than 1.5MPa after curing. It can work for a long time in the range of -60℃ to 315℃, ensuring the reliability of the bonding.

[0014] Furthermore, a reinforcing plate is provided on the upper part of the closing valve plate. The reinforcing plate is arranged around the circumference of the closing valve plate or in a grid pattern. A guide rod is fixedly installed on the closing valve plate. An extension rod is installed on the top of the guide rod through a nut. The extension rod is connected to the opening and closing drive device to facilitate the lifting and lowering of the closing valve plate.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. The sealing structure of the valve plate system in this industrial silicon bag industry has the following characteristics: when the valve plate system is closed, the bottom annular ring of the valve plate is pressed into the silicone rubber sponge sealing strip in the lower annular groove. The silicone rubber sponge sealing strip is made of a relatively soft material, forming an elastic seal, and it does not deform at high temperatures. When pressed, it can ensure the sealing of the valve plate system and ensure no leakage. At the same time, it avoids hard contact between the valve plate and the base, prevents deformation, and improves practicality. 2. The sealing structure of the valve plate system of this industrial silicone bag features a built-in airbag structure that achieves dynamic sealing by pressure-expanding the edges. Under the pressure of the annular ring, it automatically adjusts the sealing pressure on both sides to compensate for insufficient planar fit. At the same time, the air pressure balance of the airbag structure ensures the elasticity of the silicone rubber sponge sealing strip and prevents the silicone rubber sponge sealing strip from shrinking due to long-term compression. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic cross-sectional view of the overall structure of this utility model. Figure 2 The diagram shown is a top view of the steel structure base of this utility model. Figure 3 The diagram shown is a schematic of the structure of the closing valve plate of this utility model after opening and closing; Figure 4 This utility model is shown. Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 The diagram shown is a structural schematic of Embodiment 2 of this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. Steel structure base; 2. Closing valve plate; 3. Annular ring; 31. Airbag ring; 32. Connecting part; 4. Annular steel plate; 5. Silicone rubber sponge sealing strip; 6. Guide rod; 7. Extension rod. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1 Please see Figures 1-4 This embodiment describes a sealing structure for an industrial silicone bag valve plate system, including a steel base 1 with a valve opening on its surface and a movable closing valve plate 2. The bottom of the closing valve plate 2 has a downwardly extending annular ring 3. Correspondingly, the steel base 1 has an upwardly protruding annular steel plate 4. Two annular steel plates 4 are provided (both 40mm high, spaced approximately 42mm apart, forming an annular groove). The inner annular steel plate 4 is fitted and fixed to the inner wall of the valve opening, while the outer annular steel plate 4 is welded and fixed to the surface of the steel base 1. The two annular steel plates 4 and the upper surface of the steel base 1 together form an annular groove. A silicone rubber sponge sealing strip 5 (40×40mm) is embedded in the annular groove. The silicone rubber sponge sealing strip 5 is bonded and fixed to the bottom or side wall surface of the annular groove using neutral silicone adhesive. An air bladder is provided inside the silicone rubber sponge sealing strip 5. When the closing valve plate 2 is closed, the annular ring 3 presses against the silicone rubber sponge sealing strip 5 and compresses the air bladder.

[0020] In this embodiment, a reinforcing plate is also provided on the upper part of the closing valve plate 2. The reinforcing plate is arranged around the circumference of the closing valve plate 2 or in a grid pattern. A guide rod 6 is fixedly installed on the closing valve plate 2. An extension rod 7 is installed on the top of the guide rod 6 through a nut. The extension rod 7 is connected to the opening and closing drive device.

[0021] It should be noted that the entire valve plate system is integrated under each compartment of the large bag filter. Each unit is equipped with approximately 110 sealing units of the same structure, with uniform specifications, which facilitates management and spare parts storage. The valve plate 2 is moved up and down by the guide rod 6 to achieve opening and closing.

[0022] Please see Figure 3 and Figure 4In this embodiment, the airbag component includes two symmetrically arranged airbag rings 31 and a connecting portion 32 located between the two airbag rings 31. The connecting portion 32 is positioned directly opposite the downward pressing position of the annular ring 3. When the annular ring 3 moves downward and presses the connecting portion 32, the connecting portion 32 is compressed, causing the internal gas to flow to the airbag rings 31 on both sides, causing the airbag rings 31 to expand and bulge, which in turn causes the surrounding silicone rubber sponge sealing strips 5 to partially bulge and deform. The airbag component is a hollow closed elastic capsule structure. The material of the airbag component is high-temperature resistant silicone or fluororubber, and the cross-section of the connecting portion 32 is rectangular or arc-shaped protrusion. When the annular ring 3 squeezes the connecting portion 32, the gas enters the airbag rings 31 on both sides.

[0023] It should be noted that the initial inflation pressure of the airbag component is 0.2-0.3MPa. When the pressure of the annular ring 3 reaches 5-8mm, the expansion of the airbag ring 31 can reach 1.5 times the original volume, which increases the contact area between the silicone rubber sponge sealing strip 5 and the annular ring 3 by 40%, significantly improving the tightness of the sealing surface and adapting to the micro-gap compensation requirements under industrial silicon dust conditions.

[0024] Please see Figure 1 , Figure 2 and Figure 4 In this embodiment, the silicone rubber sponge sealing strip 5 has a closed-cell foam structure, and the neutral silicone sealant is a two-component high-temperature resistant sealant.

[0025] It should be noted that the density of the closed-cell foamed silicone rubber sponge sealing strip 5 is 0.6-0.8 g / cm³. 3 The compression rebound rate is ≥85% (when the compression amount is 25%), the temperature resistance range of the two-component neutral silicone sealant is -60℃ to 260℃, and the bonding strength is ≥1.2MPa, ensuring stable sealing performance and bonding effect even in the high-temperature flue gas environment of industrial silicon smelting (long-term 180℃).

[0026] Please see Figure 4 In this embodiment, the top of the annular steel plate 4 is provided with a bent part, which is used to fix the silicone rubber sponge sealing strip 5. The bending part includes a striking part set on the top of the annular steel plate 4. The striking part bends towards the center of the annular groove, so that the annular groove forms a trapezoidal shrinkage structure that is narrow at the top and wide at the bottom (inclined inward by about 3 to 5 mm), thereby clamping and fixing the silicone rubber sponge sealing strip 5.

[0027] It should be noted that the 3-5mm tilt angle of the striking part and the trapezoidal structure of the annular groove form a mechanical self-locking mechanism to prevent the sealing strip from shifting under the impact of airflow. During installation, a special tool is used to strike the top of the steel plate to achieve the required bending angle. Combined with the initial adhesion of the neutral silicone sealant, double fixation is achieved, increasing stability.

[0028] Example 2: Please refer to Figure 5Unlike Embodiment 1, the bending part includes L-shaped clips (approximately 10mm in length) symmetrically distributed on the top of the two annular steel plates 4. The L-shaped clips are arranged in an annular array and form an L-shaped buckle structure (bent at 90°), thereby covering and locking the upper edge of the silicone rubber sponge sealing strip 5 in the annular groove.

[0029] It should be noted that the L-shaped clip is straight before installation. After the silicone rubber sponge sealing strip 5 is inserted, the L-shaped clip is bent to form a buckle, which fits on both sides of the upper surface of the silicone rubber sponge sealing strip 5. This structure does not rely on the plastic deformation of the steel itself. When disassembling, the sealing strip can be quickly replaced simply by cutting the buckle, making maintenance more convenient.

[0030] The working principle of the above embodiments is as follows: When the large bag filter enters the back-flushing cleaning stage, the closed valve plate 2 rises vertically along the guide rod 6 under the drive of the external drive device. The annular ring 3 at its bottom disengages from the annular groove on the steel structure base 1, opening the flue gas passage and allowing compressed air to smoothly enter the filter bag for back-flushing cleaning. After cleaning, the closed valve plate 2 returns to its original position under the action of the drive device. The annular ring 3 precisely falls into the annular groove formed by the inner and outer annular steel plates 4 and the steel structure base 1, and gradually presses the silicone rubber sponge sealing strip 5 embedded therein, achieving complete sealing of the valve port. During this sealing process, the annular ring 3 first acts as a sealant. In the central region of strip 5, a hollow, closed airbag is pre-embedded inside the sealing strip. The airbag consists of two symmetrically arranged airbag rings 31 and a connecting part 32 located in the middle, directly opposite the downward pressure position of the annular ring. As pressure is applied, the connecting part 32 is deformed under pressure and the internal gas is squeezed and transported to the airbag rings 31 on both sides along the elastic cavity. This causes the airbag ring to expand rapidly, thereby pushing the surrounding silicone rubber sponge sealing strip to undergo local radial expansion deformation, making it tightly fit the side wall surface of the inner and outer annular steel plates 4. This effectively compensates for the unevenness of the sealing surface caused by manufacturing errors, assembly gaps, and thermal deformation, and greatly improves the interface contact pressure and sealing reliability.

[0031] It should be noted that this application specifically refers to a valve plate sealing structure, while the opening and closing drive device and control of the large bag valve plate are existing technologies and will not be described in detail in this application.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a valve plate system in the industrial silicon large filter bag industry, characterized in that: The system includes a steel structure base (1) with a valve port on its surface and a closed valve plate (2) that can move up and down. The bottom of the closed valve plate (2) is provided with a downwardly extending annular ring (3). The corresponding position on the steel structure base (1) is provided with an upwardly protruding annular steel plate (4). There are two annular steel plates (4). The inner annular steel plate (4) is attached and fixed to the inner wall of the valve port, and the outer annular steel plate (4) is welded and fixed to the surface of the steel structure base (1). The two annular steel plates (4) and the upper end face of the steel structure base (1) form an annular groove. A silicone rubber sponge sealing strip (5) is embedded in the annular groove. The silicone rubber sponge sealing strip (5) is bonded and fixed to the bottom or side wall surface of the annular groove by neutral silicone adhesive. An air bladder is provided inside the silicone rubber sponge sealing strip (5). When the closed valve plate (2) is closed, the annular ring (3) is pressed into the silicone rubber sponge sealing strip (5) and squeezes the air bladder.

2. The sealing structure of the valve plate system for industrial silicon large filter bags according to claim 1, characterized in that: The airbag component includes two symmetrically arranged airbag rings (31) and a connecting part (32) located between the two airbag rings (31). The connecting part (32) is positioned directly opposite the downward pressing position of the annular ring (3). When the annular ring (3) moves downward and presses the connecting part (32), the connecting part (32) is pressed, causing the internal gas to flow to the airbag rings (31) on both sides, causing the airbag rings (31) to expand and bulge, which in turn causes the surrounding silicone rubber sponge sealing strip (5) to bulge and deform locally.

3. The sealing structure of the valve plate system for industrial silicon large filter bags according to claim 2, characterized in that: The airbag is a hollow, closed elastic capsule structure. The airbag is made of high-temperature resistant silicone or fluororubber. The cross-section of the connecting part (32) is rectangular or arc-shaped. When the ring (3) squeezes the connecting part (32), the gas enters the airbag rings (31) on both sides.

4. The sealing structure of the valve plate system for industrial silicon large filter bags according to claim 1, characterized in that: The top of the annular steel plate (4) is provided with a bend, which is used to fix the silicone rubber sponge sealing strip (5).

5. The sealing structure of the valve plate system for industrial silicon large filter bags according to claim 4, characterized in that: The bending part includes a striking part set on the top of the annular steel plate (4). The striking part bends towards the center of the annular groove, so that the annular groove forms a trapezoidal shrinkage structure that is narrow at the top and wide at the bottom, thereby clamping and fixing the silicone rubber sponge sealing strip (5).

6. The sealing structure of the valve plate system for industrial silicon large filter bags according to claim 4, characterized in that: The bending section includes L-shaped clips symmetrically distributed on the top of the two annular steel plates (4). The L-shaped clips are arranged in an annular array and form an L-shaped buckle structure, thereby covering and locking the upper edge of the silicone rubber sponge sealing strip (5) in the annular groove.

7. The sealing structure of the valve plate system for industrial silicon large filter bags according to claim 1, characterized in that: The silicone rubber sponge sealing strip (5) has a closed-cell foam structure, and the neutral silicone sealant is a two-component high-temperature resistant sealant.

8. The sealing structure of the valve plate system for industrial silicon large filter bags according to claim 1, characterized in that: The upper part of the closing valve plate (2) is also provided with a reinforcing plate. The reinforcing plate is arranged around the circumference or in a grid pattern along the closing valve plate (2). A guide rod (6) is fixedly installed on the closing valve plate (2). An extension rod (7) is installed on the top of the guide rod (6) through a nut. The extension rod (7) is connected to the opening and closing drive device.

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