Damping support structure of induced draft fan of thermal power plant

Abstract

The utility model relates to the technical field of damping support structures, and discloses a damping support structure of a thermal power plant induced draft fan, which comprises a connecting base and a mounting plate, a buffer block is arranged on the connecting base, a sliding block is arranged on the buffer block in a sliding manner, a buffer spring is arranged on the buffer block, a friction block is arranged on the buffer block, and a friction strip is arranged on the sliding block. A damping device is arranged at the joint of the friction strip and the friction block, a positioning block is rotationally arranged on the sliding block, a buffer damper is arranged on the positioning block, a fixing block is rotationally arranged on the mounting plate, one end of the buffer damper is connected with the fixing block, a damping spring connected to the buffer damper in a sleeving mode is arranged on the fixing block, and a supporting mechanism is arranged on the connecting base. Compared with the prior art, the vibration buffering device has the advantages that vibration is effectively buffered, the induced draft fan is prevented from violently shaking, the induced draft fan is prevented from being shut down, and the combustion efficiency and safety of a boiler are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shock-absorbing support structures, in particular to a shock-absorbing support structure for an induced draft fan of a thermal power plant. Background Art

[0002] The induced draft fan of a thermal power plant is a device used to transfer air to the boiler to provide oxygen for combustion. The induced draft fan is usually installed above the boiler furnace. It sucks in air and pressurizes it to send it into the furnace to maintain the combustion process and flue gas emissions. It is one of the important equipment in a thermal power plant and is crucial to ensuring the combustion efficiency and safe operation of the boiler. The induced draft fan is usually equipped with a motor drive, and its rotor blade design can generate a large flow and pressure. The induced draft fan will generate a lot of vibration when in operation. Therefore, shock-absorbing supports are usually used to install the induced draft fan of a thermal power plant.

[0003] The existing shock-absorbing support structure of the induced draft fan in a thermal power plant usually buffers vibrations by means of a shock-absorbing pad made of elastic material arranged at the lower end of the shock-absorbing support. The shock-absorbing pad made of elastic material can buffer smaller vibrations by its own deformation, but when encountering larger vibrations, the shock-absorbing effect of the shock-absorbing pad is not enough to sufficiently buffer the vibrations, which can easily cause the induced draft fan to shake violently and lead to shutdown accidents, affecting the efficiency and safety of boiler combustion. Utility Model Content

[0004] The utility model aims to provide a shock-absorbing support structure for an induced draft fan in a thermal power plant to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a shock-absorbing support structure of an induced draft fan in a thermal power plant, comprising a connecting base and a mounting plate, the connecting base surface is provided with connecting holes at four corners, the connecting base bottom surface is provided with a buffer pad, the mounting plate surface is provided with mounting holes at four corners, the connecting base top is provided with a buffer block, the buffer block is slidably provided with a sliding block, a buffer spring is installed on the side wall of the inner cavity of the buffer block, one end of the buffer spring is connected to the sliding block, the buffer block is provided with a friction block, the sliding block is provided with a friction strip, the connection between the friction strip and the friction block has damping, a positioning block is rotatably connected to the sliding block, a buffer damper is provided on the positioning block, a fixed block is rotatably provided on the mounting plate, one end of the buffer damper is connected to the fixed block, a damping spring sleeved on the buffer damper is provided on the fixed block, a supporting mechanism is provided on the connecting base, and the connecting base is connected to the mounting plate through the supporting mechanism;

[0006] The support mechanism includes a support sleeve arranged on a connecting base, a support column is slidably provided on the support sleeve, an upper end of the support column is connected to a mounting plate, a support spring is provided on the connecting base and is sleeved on the support sleeve, and one end of the support spring is connected to the mounting plate.

[0007] Preferably, the buffer blocks are symmetrically arranged on both sides of the supporting mechanism.

[0008] Preferably, the buffer block is provided with a sliding rod, and the buffer spring is sleeved on the sliding rod.

[0009] Preferably, a friction sheet is provided on the support column, a friction plate is provided on the support sleeve, and damping is provided at the connection between the friction sheet and the friction plate.

[0010] Preferably, a buffer ring is provided on the connection base, and the buffer ring is arranged corresponding to the connection hole.

[0011] Preferably, a matching cover is provided on the connecting base, a dust cover is provided on the mounting plate, the dust cover is slidably connected to the matching cover, and a sealing ring is provided at the connection between the dust cover and the matching cover.

[0012] Compared with the prior art, the beneficial effect of the utility model is that when encountering a large vibration, the buffer damper cooperates with the damping spring to perform preliminary buffering of the vibration, and the excess vibration is transmitted to the sliding block. The friction strip of the sliding block and the friction block of the buffer block slide in cooperation, and the connection between the friction strip and the friction block has damping. With the cooperation of the buffer spring, the vibration is buffered, the vibration is effectively buffered, the induced draft fan is prevented from shaking violently, the induced draft fan is prevented from shutting down, and the efficiency and safety of boiler combustion are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a shock-absorbing support structure of an induced draft fan in a thermal power plant according to the utility model. Figure 1 .

[0014] Figure 2 This is a schematic diagram of the structure of a shock-absorbing support structure of an induced draft fan in a thermal power plant according to the utility model. Figure 2 .

[0015] Figure 3 This is a schematic diagram of the structure of a shock-absorbing support structure of an induced draft fan in a thermal power plant according to the utility model. Figure 3 .

[0016] Figure 4 This is a schematic diagram of the structure of a shock-absorbing support structure of an induced draft fan in a thermal power plant according to the utility model. Figure 4 .

[0017] Figure 5 It is an enlarged view of part A of a shock-absorbing support structure of an induced draft fan in a thermal power plant according to the utility model.

[0018] Figure 6 It is an enlarged view of part B of a shock-absorbing support structure of an induced draft fan in a thermal power plant according to the utility model.

[0019] In the figure: 1. connecting base; 2. mounting plate; 3. connecting hole; 4. mounting hole; 5. buffer ring; 6. buffer pad; 7. dust cover; 8. matching cover; 9. sealing ring; 10. support column; 11. support sleeve; 12. support spring; 13. buffer block; 14. sliding rod; 15. sliding block; 16. buffer spring; 17. positioning block; 18. fixing block; 19. buffer damper; 20. damping spring; 21. friction block; 22. friction strip; 23. friction plate; 24. friction plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Embodiment 1

[0024] Combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 And attached Figure 6A shock-absorbing support structure for an induced draft fan in a thermal power plant comprises a connecting base 1 and a mounting plate 2, wherein the connecting base 1 is provided with a connecting hole 3, and the mounting plate 2 is provided with a mounting hole 4, wherein the connecting hole 3 and the mounting hole 4 are both provided in multiple groups, wherein the connecting base 1 is provided with a buffer ring 5, and the buffer ring 5 is provided corresponding to the connecting hole 3, and a buffer pad 6 is provided at the lower end of the connecting base 1, wherein the buffer ring 5 and the buffer pad 6 are both made of elastic material, and wherein the connecting base 1 is provided with a buffer block 13, and a sliding block 15 is provided on the buffer block 13, and a buffer spring 16 is provided on the buffer block 13, and one end of the buffer spring 16 is connected to the sliding block 15 The buffer block 13 is provided with a friction block 21, the sliding block 15 is provided with a friction strip 22, and the connection between the friction strip 22 and the friction block 21 has damping, the sliding block 15 is rotatably provided with a positioning block 17, and the positioning block 17 is provided with a buffer damper 19, and the mounting plate 2 is rotatably provided with a fixed block 18, one end of the buffer damper 19 is connected to the fixed block 18, and the fixed block 18 is provided with a damping spring 20 sleeved on the buffer damper 19, and the connecting base 1 is provided with a supporting mechanism, and the connecting base 1 is connected to the mounting plate 2 through the supporting mechanism, and the buffer blocks 13 are symmetrically arranged on both sides of the supporting mechanism.

[0025] Through the above structure, the connecting base 1 can be fixedly connected to the installation point by cooperating with the connecting hole 3 and the bolt, and the mounting plate 2 can be fixedly connected to the induced draft fan by cooperating with the mounting hole 4 and the bolt; the buffer ring 5 and the buffer pad 6 made of elastic material can buffer the vibration through their own deformation; the vibration generated by the induced draft fan is transmitted to the fixed block 18 through the mounting plate 2, and the fixed block 18 performs preliminary buffering of the vibration through the buffer damper 19 and the damping spring 20, and the excess vibration is transmitted to the sliding block 15 through the positioning block 17, and the sliding block 15 slides along the buffer block 13 and squeezes the buffer spring 16, and the buffer spring 16 is deformed. At the same time, the friction block 21 and the friction strip 22 slide synchronously. Since the connection between the friction block 21 and the friction strip 22 has damping, the vibration is further buffered.

[0026] Combined with Figure 3 , Attachment Figure 4 And attached Figure 6 The buffer block 13 is provided with a sliding rod 14, and the buffer spring 16 is sleeved on the sliding rod 14 to improve the stability of the buffer spring 16 during movement and prevent the buffer spring 16 from being displaced during contraction and extension.

[0027] Embodiment 2

[0028] Combined with Figure 3 To Attachment Figure 5The support mechanism includes a support sleeve 11 arranged on the connecting base 1, a support column 10 is slidably provided on the support sleeve 11, the upper end of the support column 10 is connected to the mounting plate 2, a support spring 12 is provided on the connecting base 1 and is sleeved on the support sleeve 11, one end of the support spring 12 is connected to the mounting plate 2, a friction plate 24 is provided on the support column 10, a friction plate 23 is provided on the support sleeve 11, and damping is provided at the connection between the friction plate 24 and the friction plate 23.

[0029] Through the above structure, the support sleeve 11, the support column 10 and the support spring 12 cooperate to provide stable support for the mounting plate 2. When strong vibration is transmitted to the mounting plate 2, the support column 10 and the support sleeve 11 slide relative to each other, and the mounting plate 2 squeezes the support spring 12. The support spring 12 is deformed by the force. At the same time, the friction plate 24 and the friction plate 23 are relatively displaced. Since the connection between the friction plate 24 and the friction plate 23 has damping, the vibration is buffered.

[0030] Embodiment 3

[0031] Combined with Figure 1 To Attachment Figure 4 A matching cover 8 is provided on the connecting base 1, and a dust cover 7 is provided on the mounting plate 2. The dust cover 7 is slidably connected to the matching cover 8, and a sealing ring 9 is provided at the connection between the dust cover 7 and the matching cover 8.

[0032] Through the above structure, since the induced draft fans of thermal power plants are mostly installed above the boiler, which leads to a lot of dust in the working environment, the arrangement of the dust cover 7, the matching cover 8 and the sealing ring 9 improves the sealing performance of the shock-absorbing support structure of the utility model, avoids the adverse effects of dust on various components, and extends the service life of various components.

[0033] The specific usage is as follows:

[0034] The connection base 1 is installed by matching the connection hole 3 with the bolt, and the mounting plate 2 is fixedly connected to the induced draft fan by matching the mounting hole 4 with the bolt. When a large vibration occurs, the vibration is transmitted to the fixed block 18 through the mounting plate 2. The fixed block 18 performs preliminary buffering of the vibration through the buffer damper 19 and the damping spring 20. The excess vibration is transmitted to the sliding block 15 through the positioning block 17. The sliding block 15 slides along the buffer block 13 and squeezes the buffer spring 16, causing the buffer spring 16 to deform. At the same time, the friction block 21 and the friction strip 22 slide synchronously. Since the connection between the friction block 21 and the friction strip 22 has damping, the vibration is further buffered. At the same time, the support column 10 and the support sleeve 11 slide relatively, the mounting plate 2 squeezes the support spring 12, and the support spring 12 is deformed by the force. At the same time, the friction plate 24 and the friction plate 23 are relatively displaced. Since the connection between the friction plate 24 and the friction plate 23 has damping, the vibration is buffered. Under the multiple buffering effects, the vibration is fully buffered to avoid the shutdown of the induced draft fan caused by the vibration, thereby improving the efficiency and safety of boiler combustion.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shock-absorbing support structure for an induced draft fan in a thermal power plant, comprising a connecting base (1) and a mounting plate (2), characterized in that: The connection base (1) is provided with connection holes (3) at four corners of its surface, the connection base (1) is provided with a buffer pad (6) at its bottom surface, the mounting plate (2) is provided with mounting holes (4) at four corners of its surface, the connection base (1) is provided with a buffer block (13) at the top, a sliding block (15) is slidably provided on the buffer block (13), a buffer spring (16) is installed on the side wall of the inner cavity of the buffer block (13), one end of the buffer spring (16) is connected to the sliding block (15), a friction block (21) is provided on the buffer block (13), and a friction strip (21) is provided on the sliding block (15). 2), the friction strip (22) and the friction block (21) are connected at a damping position, the sliding block (15) is rotatably connected to a positioning block (17), the positioning block (17) is provided with a buffer damper (19), the mounting plate (2) is rotatably provided with a fixed block (18), one end of the buffer damper (19) is connected to the fixed block (18), the fixed block (18) is provided with a damping spring (20) sleeved on the buffer damper (19), the connecting base (1) is provided with a supporting mechanism, and the connecting base (1) is connected to the mounting plate (2) through the supporting mechanism; The support mechanism comprises a support sleeve (11) arranged on a connection base (1), a support column (10) being slidably arranged on the support sleeve (11), the upper end of the support column (10) being connected to a mounting plate (2), a support spring (12) being sleeved on the support sleeve (11) being arranged on the connection base (1), one end of the support spring (12) being connected to the mounting plate (2).

2. The shock-absorbing support structure of the induced draft fan of a thermal power plant according to claim 1, characterized in that: The buffer blocks (13) are symmetrically arranged on both sides of the supporting mechanism.

3. The shock-absorbing support structure of the induced draft fan of a thermal power plant according to claim 1, characterized in that: The buffer block (13) is provided with a sliding rod (14), and the buffer spring (16) is sleeved on the sliding rod (14).

4. The shock-absorbing support structure of the induced draft fan of a thermal power plant according to claim 1, characterized in that: The support column (10) is provided with a friction plate (24), the support sleeve (11) is provided with a friction plate (23), and the connection between the friction plate (24) and the friction plate (23) has damping.

5. The shock-absorbing support structure of the induced draft fan of a thermal power plant according to claim 1, characterized in that: The connection base (1) is provided with a buffer ring (5), and the buffer ring (5) is arranged corresponding to the connection hole (3).

6. The shock-absorbing support structure of the induced draft fan of a thermal power plant according to claim 1, characterized in that: The connection base (1) is provided with a matching cover (8), the mounting plate (2) is provided with a dust cover (7), the dust cover (7) is slidably connected to the matching cover (8), and a sealing ring (9) is provided at the connection between the dust cover (7) and the matching cover (8).

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