Two-way sealing plug door for desulfurization flue

Abstract

The utility model discloses a desulfurization flue two -way sealing plug door relates to plug door technical field. This desulfurization flue two -way sealing plug door, including door body frame, the bottom welding of inside door body frame has the baffle, the top of baffle is equipped with the closed groove, and the middle part of baffle is equipped with the door interface for the butt joint flue of penetrating closed groove, the top of door body frame is equipped with transmission screw rod through sealing bearing, the utility model discloses through transmission switch mechanism drives transmission screw rod positive and negative rotation, makes transmission nut drive door plate and slides along closed groove, can open or close door interface, through a plurality of sealing strips, when door plate closes in place and a plurality of sealing strips close contact, can seal closed groove, solved the current big power plant of all over the country, power station, chemical plant, paper mill, heating flue uses plug door long -time use to appear the problem such as leakage, door plate deformation.

Description

Technical Field

[0001] This utility model designs a novel insert gate for isolating flue gas in desulfurization flues. Specifically, it is an insert gate design. Background Technology

[0002] Electric slide gates are important auxiliary equipment for boilers. They are installed on the cold and hot air ducts of boilers in thermal power plants where shut-off and isolation are required. Compared with other desulfurization dampers such as double louvered dampers, which have the disadvantage of not closing tightly, slide gates greatly improve the sealing performance and facilitate the switching and maintenance of boiler equipment.

[0003] Currently, the flue gas inlets used in power plants, chemical plants, paper mills, heating systems, and other facilities across the country are experiencing problems such as leakage and door panel deformation after prolonged use. In response to this situation, we have designed and developed a new flue gas inlet. The flue gas inlet has a simple and reliable structure, is easy to install and operate, and has strong sealing performance. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a bidirectional sealing gate for desulfurization flues, which solves the problem of leakage and door panel deformation that occurs after long-term use of gates used in flues of power plants, chemical plants, paper mills, and heating systems across the country.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a desulfurization flue bidirectional sealing insert door, including a door frame, a baffle welded to the bottom of the inner side of the door frame, a sealing groove opened at the top of the baffle, and a door interface for connecting to the flue is opened through the sealing groove in the middle of the baffle. A transmission screw is mounted on the top of the door frame via a sealed bearing, and a transmission switch mechanism is fixedly mounted on the top of the door frame. The output end of the transmission switch mechanism is fixedly connected to the upper end of the transmission screw. A transmission nut is sleeved on the lower end of the transmission screw, and a door panel is welded to the bottom of the transmission nut. The lower end of the transmission screw is inserted into the inner wall of the door panel, and the door panel is inserted into a closed groove. Multiple sealing strips are installed on the inner wall of the closed groove.

[0006] Preferably, the left and right side walls, the bottom, and the front and rear side walls near the top edge of the sealing groove are provided with grooves, and each sealing strip is fixed in multiple grooves by screws.

[0007] Preferably, the sealing strip is made of high-temperature and corrosion-resistant ceramic fiber material.

[0008] Preferably, the door panel is made of carbon steel or stainless steel and adopts a double door panel structure. The door panel includes a square tube, which is fixedly connected to the bottom of the transmission nut, and steel plates are fixedly connected to both sides of the square tube.

[0009] Preferably, the total thickness of the square tube after being connected to the two steel plates is ≥80mm.

[0010] Preferably, the top of the square tube has a circular through hole larger than the diameter of the transmission screw, the lower end of the transmission screw passes through the circular through hole, and a stop block larger than the circular through hole is fixedly connected to the lower end of the transmission screw and below the circular through hole. When the door panel is opened upward, the transmission screw rotates, and the transmission nut drives the door panel to move upward, and the transmission screw gradually inserts into the door panel. Conversely, when the door panel is closed, the transmission nut drives the door panel to move downward.

[0011] Preferably, two reinforcing rods are symmetrically distributed on the top of the inner side of the door frame, and guide concave plates for limiting the lifting and lowering of the door panel are fixedly installed on both sides of the inner side of the door frame and directly above the baffle. Beneficial effects

[0012] This utility model provides a bidirectional sealing gate for desulfurization flues. Compared with the prior art, it has the following advantages: This desulfurization flue bidirectional sealing gate uses a transmission switch mechanism to drive the transmission screw to rotate in both directions, causing the transmission nut to slide the gate panel up and down along the sealing groove. This allows the gate interface to be opened or closed. With multiple sealing strips, when the gate panel is closed, it makes tight contact with the multiple sealing strips, which can seal the sealing groove. This solves the problem of leakage and gate panel deformation that occurs after long-term use of gate panels used in flues of power plants, chemical plants, paper mills, heating systems, etc. in major power plants, chemical plants, paper mills, etc. across the country. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of the present utility model; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram showing the contact between the door panel and the sealing strip of this utility model; Figure 4 This is a schematic diagram of the door panel structure of this utility model; Figure 5 This is a three-dimensional schematic diagram of the present invention; Figure 6 This is a cross-sectional schematic diagram of the present invention; Figure 7 This is a schematic diagram of the installation of the sealing strip of this utility model.

[0014] In the diagram: 1. Door frame; 2. Baffle; 3. Door interface; 4. Drive screw; 5. Drive switch mechanism; 6. Drive nut; 7. Door panel; 71. Square tube; 72. Steel plate; 8. Sealing strip; 9. Reinforcing rod; 11. Enclosed groove; 12. Guide concave plate; 13. Stop block. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1 - Figure 7 This utility model provides a technical solution: a bidirectional sealing insert door for desulfurization flue gas, including a door frame 1, a baffle 2 welded to the bottom of the inner side of the door frame 1, a sealing groove 11 opened at the top of the baffle 2, and a door interface 3 for connecting to the flue gas is opened through the sealing groove 11 in the middle of the baffle 2; a transmission screw 4 is installed on the top of the door frame 1 through a sealed bearing, and a transmission switch mechanism 5 is fixedly installed on the top of the door frame 1, the output end of the transmission switch mechanism 5 is fixedly connected to the upper end of the transmission screw 4; a transmission nut 6 is sleeved on the lower end of the transmission screw 4, a door panel 7 is welded to the bottom of the transmission nut 6, the lower end of the transmission screw 4 is inserted into the inner wall of the door panel 7, the door panel 7 is inserted into the sealing groove 11, and multiple sealing strips 8 are installed on the inner wall of the sealing groove 11.

[0017] The baffle 2, the sealed bearing for connecting the transmission screw 4, and the transmission switch mechanism 5 can be installed and fixed through the door frame 1. The baffle 2 can be welded and fixed to the door frame 1, and also provides space for the door interface 3 and the closing groove 11. Since the output end of the transmission switch mechanism 5 is fixedly connected to the upper end of the transmission screw 4, and the lower end of the transmission screw 4 is fitted with a transmission nut 6, and the bottom of the transmission nut 6 is welded to the door panel 7, after the two door interfaces 3 are welded to the flue, the transmission switch mechanism 5 is turned on by an external power source to drive the transmission. When the lead screw 4 rotates in the forward direction, the transmission nut 6 moves upward along the lead screw 4 under the action of the thread. Since the lower end of the lead screw 4 is inserted into the inner wall of the door panel 7, the door panel 7 slides upward along the sealing groove 11, thereby opening the door interface 3 and allowing the flue gas to circulate. However, the transmission switch mechanism 5 drives the lead screw 4 to rotate in the reverse direction, causing the transmission nut 6 to move downward along the lead screw 4, which in turn drives the door panel 7 to slide down and reset along the sealing groove 11, thereby closing the door interface 3 and sealing the sealing groove 11.

[0018] See Figure 3 , Figure 7 The left and right side walls, bottom and front and rear side walls near the top edge of the sealing groove 11 are provided with grooves, and each sealing strip 8 is fixed in multiple grooves by screws; the sealing strip 8 is made of high temperature and corrosion resistant ceramic fiber material.

[0019] The closure groove 11 provides space for multiple recesses. Since each sealing strip 8 is fixed to multiple recesses with screws, and the sealing strip 8 is made of high-temperature and corrosion-resistant ceramic fiber material, when the door panel 7 is closed, as shown in the attached diagram of the instruction manual... Figure 3 The door panel 7 shown is in contact with multiple sealing strips 8 on the top, sides and bottom, respectively, thereby providing a soft seal to the sealing groove 11, making it tightly contacted all around, achieving zero leakage, and the structure is not complicated and maintenance is simple.

[0020] See Figure 1 , Figure 4 The door panel 7 is made of carbon steel or stainless steel and adopts a double door panel structure. The door panel 7 includes a square tube 71, which is fixedly connected to the bottom of the transmission nut 6. Steel plates 72 are fixedly connected to both sides of the square tube 71. The total thickness of the square tube 71 and the two steel plates 72 after connection is ≥80mm.

[0021] The transmission nut 6 and the two steel plates 72 can be installed and fixed through the square tube 71 in the door panel 7. Since the total thickness of the square tube 71 and the two steel plates 72 after connection is ≥80mm, and the door panel 7 is made of carbon steel or stainless steel, the rigidity, strength and corrosion resistance of carbon steel or stainless steel can make the door panel 7 safe and reliable to use, able to withstand high pipeline pressure, and not deform after long-term use, thus extending its service life.

[0022] See Figure 5 , Figure 6 The top of the square tube 71 has a circular through hole larger than the diameter of the transmission screw 4. The lower end of the transmission screw 4 passes through the circular through hole. The lower end of the transmission screw 4 and below the circular through hole is fixedly connected to a stop block 13 larger than the circular through hole. When the door panel 7 is opened upward, the transmission screw 4 rotates and the transmission nut 6 drives the door panel 7 to move upward. The transmission screw 4 gradually inserts into the door panel 7. Conversely, when the door panel 7 is closed, the transmission nut 6 drives the door panel 7 to move downward.

[0023] The square tube 71 provides space for the circular through hole. Since the lower end of the transmission screw 4 passes through the circular through hole, the transmission screw 4 rotates and the transmission nut 6 moves upward along the transmission screw 4. At this time, the transmission screw 4 slides down along the circular through hole, so that the door panel 7 can slide upward along the closed groove 11, and then the door panel 7 can open the door interface 3. Since the lower end of the transmission screw 4 is fixedly connected to a stop block 13 that is larger than the circular through hole, when the transmission screw 4 rotates in the opposite direction, the transmission screw 4 slides down along the circular through hole. When the transmission screw 4 moves to the bottom of the circular through hole, the stop block 13 contacts the top of the inner side of the square tube 71, which can limit the transmission screw 4 and thus prevent the transmission screw 4 from disengaging from the circular through hole.

[0024] See Figure 1 , Figure 5 Two reinforcing rods 9 are symmetrically distributed on the top of the inner side of the door frame 1, and guide concave plates 12 for limiting the lifting and lowering of the door panel 7 are fixedly installed on both sides of the inner side of the door frame 1 and directly above the baffle 2.

[0025] By fixing two reinforcing rods 9 to the top of the inner side of the door frame 1, the structural strength, stability and deformation resistance of the door frame 1 can be enhanced, thereby increasing the service life of the door frame 1. Since guide concave plates 12 are fixedly installed on both sides of the inner side of the door frame 1, when the door panel 7 moves upward, the two sides of the door panel 7 move upward along the two guide concave plates 12, which can reduce errors or offsets and thus improve the stability of the door panel 7.

[0026] During operation, the baffle 2, the sealed bearing for connecting the transmission screw 4, and the transmission switch mechanism 5 can be installed and fixed through the door frame 1. The baffle 2 can be welded and fixed to the door frame 1, and also provides space for the door interface 3 and the closing groove 11. Since the output end of the transmission switch mechanism 5 is fixedly connected to the upper end of the transmission screw 4, and the lower end of the transmission screw 4 is fitted with a transmission nut 6, and the bottom of the transmission nut 6 is welded to the door panel 7, the two door interfaces 3 are welded to the flue. After the transmission switch mechanism 5 is turned on by an external power source, it can drive the transmission switch mechanism 5. When the transmission screw 4 rotates in the forward direction, the transmission nut 6 moves upward along the transmission screw 4 due to the action of the thread on the transmission screw 4. Since the lower end of the transmission screw 4 is inserted into the inner wall of the door panel 7, the door panel 7 slides upward along the sealing groove 11, thereby opening the door interface 3 and allowing the flue gas to circulate. However, the transmission switch mechanism 5 drives the transmission screw 4 to rotate in the reverse direction, causing the transmission nut 6 to move downward along the transmission screw 4, which in turn drives the door panel 7 to slide down and reset along the sealing groove 11, thereby closing the door interface 3 and sealing the sealing groove 11.

[0027] The closure groove 11 provides space for multiple recesses. Since each sealing strip 8 is fixed to multiple recesses with screws, and the sealing strip 8 is made of high-temperature and corrosion-resistant ceramic fiber material, when the door panel 7 is closed, as shown in the attached diagram of the instruction manual... Figure 3 The door panel 7 shown is in contact with multiple sealing strips 8 on the top, sides and bottom, respectively, thereby providing a soft seal to the sealing groove 11, making it tightly contacted all around, achieving zero leakage, and the structure is not complicated and maintenance is simple.

[0028] The transmission nut 6 and the two steel plates 72 can be installed and fixed through the square tube 71 in the door panel 7. Since the total thickness of the square tube 71 and the two steel plates 72 after connection is ≥80mm, and the door panel 7 is made of carbon steel or stainless steel, the rigidity, strength and corrosion resistance of carbon steel or stainless steel can make the door panel 7 safe and reliable to use, able to withstand high pipeline pressure, and not deform after long-term use, thus extending its service life.

[0029] The square tube 71 provides space for the circular through hole. Since the lower end of the transmission screw 4 passes through the circular through hole, the transmission screw 4 rotates and the transmission nut 6 moves upward along the transmission screw 4. At this time, the transmission screw 4 slides down along the circular through hole, so that the door panel 7 can slide upward along the closed groove 11, and then the door panel 7 can open the door interface 3. Since the lower end of the transmission screw 4 is fixedly connected to a stop block 13 that is larger than the circular through hole, when the transmission screw 4 rotates in the opposite direction, the transmission screw 4 slides down along the circular through hole. When the transmission screw 4 moves to the bottom of the circular through hole, the stop block 13 contacts the top of the inner side of the square tube 71, which can limit the transmission screw 4 and thus prevent the transmission screw 4 from disengaging from the circular through hole.

[0030] By fixing two reinforcing rods 9 to the top of the inner side of the door frame 1, the structural strength, stability and deformation resistance of the door frame 1 can be enhanced, thereby increasing the service life of the door frame 1. Since guide concave plates 12 are fixedly installed on both sides of the inner side of the door frame 1, when the door panel 7 moves upward, the two sides of the door panel 7 move upward along the two guide concave plates 12, which can reduce errors or offsets and thus improve the stability of the door panel 7.

[0031] In summary, the device drives the transmission screw 4 to rotate in both directions by activating the transmission switch mechanism 5, which in turn causes the transmission nut 6 to drive the door panel 7 to slide up and down along the closed groove 11, thus opening or closing the door interface 3.

[0032] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A bidirectional sealing gate for desulfurization flue gas ducts, comprising a gate frame (1), characterized in that: A baffle (2) is welded to the bottom of the inner side of the door frame (1). A closed groove (11) is opened on the top of the baffle (2), and a door interface (3) for connecting to the flue is opened through the closed groove (11) in the middle of the baffle (2). The top of the door frame (1) is fitted with a transmission screw (4) via a sealed bearing, and the top of the door frame (1) is fixedly fitted with a transmission switch mechanism (5), the output end of which is fixedly connected to the upper end of the transmission screw (4). The lower end of the transmission screw (4) is fitted with a transmission nut (6), and a door panel (7) is welded to the bottom of the transmission nut (6). The lower end of the transmission screw (4) is inserted into the inner wall of the door panel (7), and the door panel (7) is inserted into the closed groove (11). Multiple sealing strips (8) are installed on the inner wall of the closed groove (11).

2. The bidirectional sealing gate for desulfurization flue gas duct according to claim 1, characterized in that: The left and right side walls, bottom and front and rear side walls near the top edge of the sealing groove (11) are provided with grooves, and each sealing strip (8) is fixed in multiple grooves by screws.

3. The bidirectional sealing gate for desulfurization flue gas duct according to claim 1, characterized in that: The sealing strip (8) is made of high-temperature and corrosion-resistant ceramic fiber material.

4. The bidirectional sealing gate for desulfurization flue gas duct according to claim 1, characterized in that: The door panel (7) is made of carbon steel or stainless steel and adopts a double door panel structure. The door panel (7) includes a square tube (71), which is fixedly connected to the bottom of the transmission nut (6). Steel plates (72) are fixedly connected to both sides of the square tube (71).

5. The bidirectional sealing gate for desulfurization flue gas duct according to claim 4, characterized in that: The total thickness of the square tube (71) after being connected with the two steel plates (72) is ≥80mm.

6. The bidirectional sealing gate for desulfurization flue gas duct according to claim 4, characterized in that: The top of the square tube (71) has a circular through hole larger than the diameter of the transmission screw (4). The lower end of the transmission screw (4) passes through the circular through hole. The lower end of the transmission screw (4) and below the circular through hole is fixedly connected to a stop block (13) larger than the circular through hole.

7. The bidirectional sealing gate for desulfurization flue gas duct according to claim 1, characterized in that: Two reinforcing rods (9) are symmetrically distributed on the top of the inner side of the door frame (1), and guide concave plates (12) for limiting the lifting and lowering of the door panel (7) are fixedly installed on both sides of the inner side of the door frame (1) and directly above the baffle (2).

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