A structure for the exhaust port of an induced draft fan with a guide ring

Abstract

This utility model relates to the field of induced draft fans and discloses an exhaust port structure for an induced draft fan with a guide ring. The structure includes an exhaust pipe and a guide ring, with the guide ring positioned on the right side of the exhaust pipe. A sealing assembly is located between the right side of the exhaust pipe and the left side of the guide ring. A clamping assembly is located outside the exhaust pipe, comprising a control block. A wrench is fixedly connected to the surface of the control block, and a pin is rotatably connected to the inner wall of the control block. A connecting rod is fixedly connected to the right side of the pin's circumferential surface. A square block is threadedly connected to the right side of the connecting rod, and a positioning rod is fixedly connected to the left side of the square block. In this utility model, rotating the control block with the wrench allows the positioning rod to quickly insert into or disengage from the positioning groove, achieving rapid connection and separation of the guide ring and the exhaust pipe. This reduces equipment downtime for maintenance, improves production efficiency, and allows for disassembly and assembly operations without the need for special tools, reducing maintenance difficulty.

Description

Technical Field

[0001] This utility model relates to the field of induced draft fans, and in particular to an induced draft fan exhaust port structure with a guide ring. Background Technology

[0002] An induced draft fan is a device that draws air from a system (equipment) by generating negative pressure through impeller rotation. It is generally installed at the tail end of a boiler to extract hot flue gas from the furnace. Induced draft fans are widely used for ventilation, dust removal, and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings. The guide ring is one of the important components of an induced draft fan. The guide ring is also called a flow divider ring and is divided into an inlet guide ring and an exhaust guide ring. The main function of the exhaust guide ring is to make the best use of the kinetic energy of the exhaust steam and reduce flow losses.

[0003] Existing exhaust guide rings are fixed with bolts during installation. However, bolts are inconvenient to disassemble and reinstall during use, and each bolt needs to be tightened individually, which is time-consuming and increases maintenance difficulty. Furthermore, the impact of airflow during long-term operation can cause vibrations that can loosen or even cause the bolts to fall off, requiring frequent maintenance and increasing maintenance costs. Therefore, a new exhaust port structure for induced draft fans with a guide ring is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a draft fan exhaust port structure with a guide ring, which aims to improve the problem in the prior art that "the bolts need to be tightened one by one, which takes a long time to install and increases the difficulty of maintenance".

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a draft fan exhaust port structure with a guide ring, comprising an exhaust pipe and a guide ring, wherein the guide ring is disposed on the right side of the exhaust pipe, a sealing assembly is disposed between the right side of the exhaust pipe and the left side of the guide ring, a clamping assembly is disposed on the outside of the exhaust pipe, the clamping assembly includes a control block, a wrench is fixedly connected to the surface of the control block, a pin is rotatably connected to the inner wall of the control block, a connecting rod is fixedly connected to the right side of the circumferential surface of the pin, a block is threadedly connected to the right side of the connecting rod, a positioning rod is fixedly connected to the left side of the block, a locking block is slidably connected to the inner wall of the control block, an anti-slip plate is fixedly connected to the top of the locking block, the locking block is elastically connected to the inner wall of the control block by a return spring, and a connecting assembly is disposed on the outside of the exhaust pipe.

[0006] As a further description of the above technical solution:

[0007] A guide plate is provided on the inner wall of the guide ring.

[0008] As a further description of the above technical solution:

[0009] The sealing assembly includes a sealing ring, the left side of which contacts the right side of the exhaust pipe, and the right side of which contacts the left side of the guide ring.

[0010] As a further description of the above technical solution:

[0011] The sealing assembly also includes a round rod, which is fixedly connected to the right side of the exhaust pipe. Both the surface of the sealing ring and the surface of the guide ring are provided with round holes, and the round rod is inserted into the inside of the round holes.

[0012] As a further description of the above technical solution:

[0013] The connecting assembly includes a connecting plate, which is fixedly connected to the surface of the exhaust pipe. The inner wall of the connecting plate is slidably connected to the outer wall of the connecting rod. A slot is provided on the left side of the connecting plate, and the locking block is inserted into the inner wall of the slot.

[0014] As a further description of the above technical solution:

[0015] The connecting assembly also includes a second connecting plate, which is fixedly connected to the surface of the guide ring, and a notch is provided on the side of the second connecting plate away from the guide ring.

[0016] As a further description of the above technical solution:

[0017] The right side of the connecting plate 2 is provided with a placement groove for accommodating the block, and the interior of the placement groove is provided with a positioning groove for accommodating the positioning rod.

[0018] As a further description of the above technical solution:

[0019] One side surface of the control block is provided with an arc-shaped surface, and the other side surface of the control block is provided with a flat surface.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, by rotating the control block with a wrench, the positioning rod can be quickly inserted into or disengaged from the positioning groove, realizing the rapid connection and separation of the guide ring and the exhaust pipe, reducing equipment downtime for maintenance, improving production efficiency, and allowing disassembly and assembly operations to be completed without special tools, thus reducing maintenance difficulty. The interlocking structure of the positioning rod and the positioning groove applies pre-tightening force during the pressing process, improving sealing performance and preventing steam leakage.

[0022] 2. In this utility model, dual positioning is achieved through the cooperation of the sealing ring and the round rod, ensuring precise fit of the sealing surface. The pre-tightening force applied by the pressing component makes the sealing ring tightly fill the connection gap. At the same time, the design of the positioning rod having a depth greater than the axial length enhances the vibration resistance of the connection structure, effectively avoiding sealing failure and loosening of the connecting parts due to vibration, and ensuring long-term stable operation of the system. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the overall three-dimensional exploded structure of this utility model;

[0025] Figure 3 This is a three-dimensional structural diagram of the flow guide ring in this utility model;

[0026] Figure 4 This utility model Figure 3 An enlarged 3D structural diagram at point A in the middle;

[0027] Figure 5 This is a three-dimensional structural diagram of the exhaust pipe and the clamping assembly in this utility model;

[0028] Figure 6 This is a right-side view of the exploded three-dimensional structure of the clamping component in this utility model;

[0029] Figure 7 This is a left-side view of the three-dimensional exploded structure of the clamping component in this utility model.

[0030] Legend:

[0031] 1. Exhaust pipe; 2. Guide ring; 3. Guide plate; 101. Sealing ring; 102. Round rod; 103. Round hole; 10. Sealing assembly; 11. Connecting assembly; 111. Connecting plate one; 112. Connecting plate two; 113. Notch; 114. Mounting groove; 115. Positioning groove; 12. Pressing assembly; 121. Control block; 122. Wrench; 123. Pin; 124. Connecting rod; 125. Square block; 126. Positioning rod; 127. Arc-shaped surface; 128. Flat surface; 21. Locking block; 22. Anti-slip plate; 23. Return spring; 24. Locking groove. Detailed Implementation

[0032] 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.

[0033] Reference Figures 1-3 This utility model provides an embodiment of an induced draft fan exhaust port structure with a guide ring, comprising an exhaust pipe 1 and a guide ring 2. The exhaust pipe 1 is responsible for steam transportation and is typically made of high-temperature and corrosion-resistant materials (such as stainless steel) to ensure the stability and safety of steam transportation. The guide ring 2 is located on the right side of the exhaust pipe 1, and a guide plate 3 is provided on the inner wall of the guide ring 2. The exhaust pipe 1 and the guide ring 2 form the main body of the airflow channel. The guide ring 2 can change the direction of steam flow, optimize the steam discharge path, and reduce flow resistance. This is existing technology. A sealing component 10 is provided between the right side of the exhaust pipe 1 and the left side of the guide ring 2. A clamping component 12 is provided on the outside of the exhaust pipe 1 to achieve sealing and clamping through a lever-type quick-locking mechanism.

[0034] Reference Figures 5-7 The clamping assembly 12 includes a control block 121. One side surface of the control block 121 is provided with an arc-shaped surface 127, and the other side surface of the control block 121 is provided with a flat surface 128. A wrench 122 is fixedly connected to the surface of the control block 121. The wrench 122 provides a force application point for the operator to rotate the control block 121 to realize the clamping or loosening operation of the connection between the exhaust pipe 1 and the guide ring 2. A pin 123 is rotatably connected to the inner wall of the control block 121. The distance between the flat surface 128 of the control block 121 and the pin 123 is greater than the distance between the arc-shaped surface 127 of the control block 121 and the pin 123, so that when the flat surface 128 of the control block 121 contacts the left side of the connecting plate 111, the positioning rod 126 can always be located in the positioning groove 115.

[0035] Reference Figures 5-7A connecting rod 124 is fixedly connected to the right side of the circumferential surface of the pin 123. A block 125 is threadedly connected to the right side surface of the connecting rod 124. A threaded groove is provided on the circumferential surface of the connecting rod 124. The block 125 is threadedly installed on the surface of the threaded groove. At the same time, the helix angle of the threaded groove is less than the equivalent friction angle between the tooth surfaces, so that when the block 125 and the threaded groove are engaged, the block 125 will not move due to changes in load, achieving a threaded self-locking effect. The plane 128 of the control block 121 is connected to the left side surface of the block 125. The distance between the surfaces is less than the distance from the left surface of connecting plate 111 to the right surface of connecting plate 212. Rotate the control block 121 so that when the plane 128 of the control block 121 contacts the left surface of connecting plate 111, the block 125 is pressed into the placement groove 114 by the pressure of the control block 121 on connecting plate 111, thus completing the stable connection between connecting plate 111 and connecting plate 212. The left surface of the block 125 is fixedly connected to the positioning rod 126, and the exhaust pipe 1 is provided with a connecting component 11 on its exterior.

[0036] Reference Figures 5-7 A locking block 21 is slidably connected to the inner wall of the control block 121. The locking block 21 slides left and right. An anti-slip plate 22 is fixedly connected to the top of the locking block 21. The anti-slip plate 22 has anti-slip texture on the side away from the locking block 21. The locking block 21 is elastically connected to the inner wall of the control block 121 through a return spring 23. The return spring 23 applies a spring force to the locking block 21 to the right. A slot 24 that cooperates with the locking block 21 is provided on the left side of the connecting plate 111. The locking block 21 is inserted into the inner wall of the slot 24. The return spring 23 locks the locking block 21 into the slot 24, so that the control block 121 maintains stability and will not move easily when subjected to external force.

[0037] Reference Figures 1-3 The sealing assembly 10 includes a sealing ring 101, which is made of high-temperature resistant and highly elastic rubber or silicone. The left side of the sealing ring 101 contacts the right side of the exhaust pipe 1, and the right side of the sealing ring 101 contacts the left side of the guide ring 2. This is used to prevent steam leakage, improve the reliability of the sealing performance, and ensure the sealing performance of the exhaust system. The sealing assembly 10 also includes a round rod 102 for positioning. The round rod 102 is fixedly connected to the right side of the exhaust pipe 1. Both the surface of the sealing ring 101 and the surface of the guide ring 2 are provided with round holes 103. The round rod 102 is inserted into the inside of the round holes 103 to ensure that the sealing ring 101 is installed in an accurate position and to prevent the sealing ring 101 from shifting during installation or use, thereby further enhancing the sealing effect.

[0038] Reference Figures 2-4The connecting assembly 11 includes a first connecting plate 111, which is fixedly connected to the surface of the exhaust pipe 1. The inner wall of the first connecting plate 111 is slidably connected to the outer wall of the connecting rod 124. The connecting rod 124 can only be linearly displaced along the axial direction of the connecting rod 124 on the inner wall of the first connecting plate 111 and cannot rotate, so that the connecting rod 124 can move flexibly and provide a movable basis for the operation of the pressing assembly 12. The connecting assembly 11 also includes a second connecting plate 112, which is fixedly connected to the surface of the guide ring 2.

[0039] Reference Figures 3-5 A notch 113 is provided on the side surface of the connecting plate 2 away from the guide ring 2. The notch 113 is used to guide the connecting rod 124 into the connecting plate 2. A placement groove 114 for accommodating the block 125 is provided on the right side of the connecting plate 2. A positioning groove 115 for accommodating the positioning rod 126 is provided inside the placement groove 114. The depth of the positioning rod 126 is greater than the axial length of the positioning rod 126.

[0040] Working principle: During use, while keeping the arc-shaped surface 127 of the control block 121 in contact with the left side of the connecting plate 111, place the sealing ring 101 on the right side of the exhaust pipe 1, and insert the round rod 102 into the round hole 103 of the sealing ring 101 to complete the initial positioning. Then, install the guide ring 2 in place, so that the round rod 102 is inserted into the round hole 103 on the surface of the guide ring 2, and the block 125 and the positioning rod 126 enter the right side of the connecting plate 112 through the notch 113, so that the sealing ring 101 is placed between the exhaust pipe 1 and the guide ring 2. The round rod 102 temporarily supports the sealing ring 101 and the guide ring 2 to facilitate subsequent operations.

[0041] Next, the operator rotates block 125, causing an angle change between block 125 and connecting rod 124, until the positioning rod 126 on the left side of block 125 aligns with the positioning groove 115. Then, the operator holds wrench 122 and rotates control block 121, causing control block 121 to rotate around pin 123 until the flat surface 128 of control block 121 contacts the left side of connecting plate 111. Since the distance between the flat surface 128 of control block 121 and pin 123 is greater than the distance between the arc surface 127 of control block 121 and pin 123, when the flat surface 128 contacts connecting plate 111... This causes the connecting rod 124 to move to the left relative to the connecting plate 112, thereby causing the block 125 on the surface of the connecting rod 124 to enter the mounting groove 114 and the positioning rod 126 to enter the positioning groove 115. At this time, the clamping assembly 12 tightly presses the exhaust pipe 1 and the guide ring 2 together, completing the connection and fixation. Furthermore, since the depth of the positioning rod 126 is greater than the axial length of the positioning rod 126, the positioning rod 126 will also apply a leftward pre-tightening force to the connecting plate 112, thereby pressing the sealing ring 101 against the right side surface of the exhaust pipe 1, improving the sealing performance and preventing steam leakage.

[0042] During the operation of the induced draft fan, steam is discharged from the exhaust pipe 1, guided by the guide plate 3 on the inner wall of the guide ring 2, and discharged after changing the flow direction. Due to the tight seal of the sealing ring 101 of the sealing component 10 and the secure connection of the compression component 12 to the exhaust pipe 1 and the guide ring 2, steam leakage is effectively prevented. At the same time, the guide plate 3 optimizes the steam flow path, reduces resistance, and allows the steam to be discharged efficiently. When disassembly and maintenance are required, first move the anti-slip plate 22 so that the locking block 21 overcomes the elastic force of the return spring 23 and moves out of the inside of the locking groove 24, thereby releasing the limit of the control block 121 and the connecting plate 111. Then turn the wrench 122 so that the arc surface 127 of the control block 121 contacts the left side surface of the connecting plate 111, so that the positioning rod 126 disengages from the positioning groove 115. Then turn the square block 125 to align with the notch 113 and pull the exhaust pipe 1 to the left to separate the exhaust pipe 1 from the guide ring 2. The disassembly operation is relatively simple and easy, and there is no need to use external tools to tighten the bolts. Maintenance is simple, reducing the difficulty and time consumption of maintenance.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A structure of a draft fan exhaust port with a draft ring, comprising an exhaust pipe (1) and a draft ring (2), characterized in that: The guide ring (2) is located on the right side of the exhaust pipe (1), and a sealing assembly (10) is provided between the right side of the exhaust pipe (1) and the left side of the guide ring (2). A pressing assembly (12) is provided on the outside of the exhaust pipe (1). The clamping assembly (12) includes a control block (121), a wrench (122) is fixedly connected to the surface of the control block (121), a pin (123) is rotatably connected to the inner wall of the control block (121), a connecting rod (124) is fixedly connected to the right side of the circumferential surface of the pin (123), a block (125) is threadedly connected to the right side surface of the connecting rod (124), a positioning rod (126) is fixedly connected to the left side surface of the block (125), a locking block (21) is slidably connected to the inner wall of the control block (121), an anti-slip plate (22) is fixedly connected to the top of the locking block (21), and the locking block (21) is elastically connected to the inner wall of the control block (121) through a return spring (23). A connecting assembly (11) is provided on the outside of the exhaust pipe (1).

2. The draft inducer steam exhaust port structure with a draft collar according to claim 1, characterized in that: A guide plate (3) is provided on the inner wall of the guide ring (2).

3. The draft inducer steam exhaust port structure with a draft collar according to claim 1, characterized in that: The sealing assembly (10) includes a sealing ring (101), the left side of which contacts the right side of the exhaust pipe (1), and the right side of which contacts the left side of the guide ring (2).

4. The draft inducer steam exhaust port structure with a draft collar according to claim 3, characterized by: The sealing assembly (10) also includes a round rod (102), which is fixedly connected to the right side of the exhaust pipe (1). The surface of the sealing ring (101) and the surface of the guide ring (2) are both provided with round holes (103), and the round rod (102) is inserted into the inside of the round holes (103).

5. The exhaust port structure of an induced draft fan with a guide ring according to claim 1, characterized in that: The connecting assembly (11) includes a connecting plate (111), which is fixedly connected to the surface of the exhaust pipe (1). The inner wall of the connecting plate (111) is slidably connected to the outer wall of the connecting rod (124). A slot (24) is provided on the left side of the connecting plate (111), and the card block (21) is inserted into the inner wall of the slot (24).

6. The exhaust port structure of an induced draft fan with a guide ring according to claim 5, characterized in that: The connecting assembly (11) further includes a second connecting plate (112), which is fixedly connected to the surface of the guide ring (2), and a notch (113) is provided on the side of the second connecting plate (112) away from the guide ring (2).

7. The exhaust port structure of an induced draft fan with a guide ring according to claim 6, characterized in that: The right side of the connecting plate 2 (112) is provided with a placement groove (114) for accommodating the block (125), and the interior of the placement groove (114) is provided with a positioning groove (115) for accommodating the positioning rod (126).

8. The exhaust port structure of an induced draft fan with a guide ring according to claim 1, characterized in that: One side surface of the control block (121) is provided with an arc-shaped surface (127), and the other side surface of the control block (121) is provided with a flat surface (128).

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