A furnace bottom plug-in type shockproof device

Abstract

The utility model relates to a furnace bottom plug -in board type shockproof device belongs to boiler equipment technical field, the utility model discloses the base, shockproof lug and shockproof beam, shockproof lug and shockproof beam form the connection of plug -in mode, and the first shockproof lug and the last shockproof lug are fixedly connected with the shockproof beam through the pin shaft respectively, and the pin hole on the first shockproof lug is the long round hole along the vertical direction extension, and the lower part of shockproof beam forms the sliding connection with the base through the sliding connection structure. The utility model solves the technical problem that the connection structure of shockproof lug and shockproof beam is not reasonable and leads to the risk of pipe screen explosion in the operation under the tension.

Description

Technical Field

[0001] This utility model relates to a vibration damping device for a waste heat boiler, and more particularly to a bottom plate type vibration damping device, belonging to the technical field of boiler equipment. Background Technology

[0002] The heat exchange tube panels inside the waste heat boiler are suspended from the furnace top. Anti-vibration devices are installed above and below the heat exchange tube panels to prevent swaying and to transmit flue gas resistance and seismic forces. Existing furnace bottom anti-vibration devices are shown in the attached diagram. Figure 1 As shown, it includes a base 3 fixed to the furnace bottom plate 2, anti-vibration lugs 4 respectively fixed to the lower headers 11 of each tube panel in the heating surface tube panel assembly 1, and anti-vibration beams 5 connecting each anti-vibration lug 4. The anti-vibration lugs 4 are connected to the anti-vibration beams 5 via pins 6, and the anti-vibration beams 5 and the base 3 are slidably connected. The above-mentioned anti-vibration device constrains the lower headers 11 of the tube panels through the anti-vibration beams 5 and anti-vibration lugs 4 to prevent the tube panels from swaying back and forth. The flue gas resistance and seismic horizontal force of the heating surface tube panel assembly 1 can be transmitted to the furnace bottom frame through the anti-vibration lugs 4, anti-vibration beams 5 and base 3. The disadvantage of this device is that the anti-vibration lugs 4 and anti-vibration beams 5 are rigidly connected structures. When the thermal expansion displacement difference between adjacent tube panels is large, the adjacent anti-vibration lugs 4 cannot generate a corresponding displacement difference on the anti-vibration beams 5. At this time, the tube panel with smaller thermal expansion displacement will be subjected to downward tension, which will bring the risk of tube rupture to the tube panel. Summary of the Invention

[0003] The present invention mainly addresses the technical problem that the unreasonable connection structure between the anti-vibration ear plate and the anti-vibration beam in the existing technology leads to the risk of tube bursting due to tension on the tube screen, and provides a furnace bottom insert plate type anti-vibration device with a more reasonable structure.

[0004] The present invention addresses the aforementioned technical problems primarily through the following technical solution: The present invention is installed at the bottom of the heating surface tube panel assembly and includes a base fixed to the furnace bottom plate, anti-vibration ear plates respectively fixed to the lower headers of each tube panel within the heating surface tube panel assembly, and a horizontally arranged anti-vibration beam. The top of the anti-vibration beam has a slot, and the anti-vibration ear plates are arranged sequentially in the slot to form an insertion connection with the anti-vibration beam. The lower part of the anti-vibration beam is slidably connected to the base through a sliding connection structure. The invention is characterized in that, in order of flue gas flow direction, the first and last anti-vibration ear plates are respectively fixedly connected to the anti-vibration beam through pins, and the pin hole on the first anti-vibration ear plate is an oblong pin slot.

[0005] Preferably, the slot passes through the anti-vibration beam.

[0006] Preferably, it also includes a locking block disposed between adjacent shock-absorbing ear plates, the locking block being fixed to the top of the shock-absorbing beam.

[0007] As a preferred embodiment, the sliding connection structure includes a pair of legs arranged forward and backward at the lower end of the anti-vibration beam according to the flue gas flow and a guide column upright on the base. The guide column is inserted into the gap between the front and rear legs to form a sliding fit with the legs. The anti-vibration beam releases the thermal expansion displacement of the heated surface tube panel assembly by sliding downward along the guide column.

[0008] This utility model has a simple structure, reasonable configuration, and the following advantages: In this invention, the anti-vibration ear plate is inserted into the slot of the anti-vibration beam. The first anti-vibration ear plate is connected to the anti-vibration beam by a pin, and the pin hole is an elongated oval hole. The first row of heated surface tubes is constrained by the anti-vibration beam and can move relative to the anti-vibration beam in the long axis direction of the pin hole. The last anti-vibration ear plate has a pin hole that matches the outer diameter of the pin. The last row of heated surface tubes is rigidly connected to the anti-vibration beam by a pin. The anti-vibration ear plate in the middle position is inserted into the anti-vibration beam and can move relative to the anti-vibration beam in the vertical direction of the slot.

[0009] Therefore, the connection structure between the anti-vibration lugs and the anti-vibration beams in this utility model is relatively reasonable. The anti-vibration beams constrain the displacement of each anti-vibration lug in the horizontal direction, thereby preventing the tube screen from shaking. Since the anti-vibration lugs of the heat-receiving tube screen in the middle position are not connected to each other, the adjacent heat-receiving tube screens can release their downward thermal expansion displacement without interfering with each other. The pin hole on the first anti-vibration lug is an oblong hole. The height difference provided by the oblong hole can offset the thermal expansion displacement difference between the first row of heat-receiving tube screens and the last row of heat-receiving tube screens.

[0010] Furthermore, the slots penetrate the anti-vibration beams, and the slots that penetrate vertically can increase the downward travel length of the anti-vibration lugs, which is beneficial for the heated surface tube screen in the middle position to fully release its thermal expansion displacement.

[0011] Furthermore, a locking block is installed between adjacent anti-vibration lugs to limit the relative displacement between adjacent anti-vibration lugs, thereby keeping the front-to-back spacing between each heated surface tube panel stable.

[0012] Furthermore, the anti-vibration beam and the base are slidably connected. By utilizing the sliding fit between the support legs and the guide column, the anti-vibration beam absorbs the thermal expansion displacement released by the heated surface tube panel assembly through the anti-vibration beam by sliding downward along the guide column.

[0013] Therefore, this utility model solves the technical problem that the unreasonable connection structure between the anti-vibration ear plate and the anti-vibration beam leads to the risk of tube bursting due to tension during operation of the tube screen. At the same time, it can also prevent the tube screen from shaking and transmit the resistance of flue gas and the horizontal force of earthquake. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of existing technology.

[0015] Appendix Figure 2 This is a schematic diagram of a preferred embodiment of the present invention.

[0016] Appendix Figure 3 It is attached Figure 2 The diagram shows a preferred embodiment in the MM direction.

[0017] Explanation of reference numerals in the attached drawings: 1. Heated surface tube panel assembly; 11. Lower header of tube panel; 2. Furnace bottom plate; 3. Base; 31. Guide column; 4. Anti-vibration ear plate; 41. Pin slot; 5. Anti-vibration beam; 51. Slot; 52. Support leg; 6. Pin; 7. Locking block. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0019] Example 1: As shown in the attached document Figure 2 Appendix Figure 3 As shown, this utility model is installed at the bottom of the heating surface tube panel assembly 1, and includes a base 3 fixed to the furnace bottom plate 2, anti-vibration ear plates 4 respectively fixed to the lower header 11 of each tube panel, and a horizontally arranged anti-vibration beam 5. The anti-vibration ear plates 4 are all inserted into the anti-vibration beam 5. The first anti-vibration ear plate 4 and the last anti-vibration ear plate 4 are also fixedly connected to the anti-vibration beam 5 by pins 6. The lower part of the anti-vibration beam 5 is slidably connected to the base 3 by a sliding connection structure. The base 3 has an upright guide post 31 at its top; The shock-absorbing ear plates 4 are arranged in sequence in the slot 51. The first shock-absorbing ear plate 4 is provided with an oblong pin slot 41, and the last shock-absorbing ear plate 4 is provided with a pin hole whose diameter matches the outer diameter of the pin 6. The shock-absorbing ear plate 4 in the middle position is limited by the locking block 7 to restrict its horizontal displacement in the slot 51. The anti-vibration beam 5 has an axially extending slot 51, which is a through slot; The lower end of the anti-vibration beam 5 has a pair of legs 52 arranged in front and behind. The guide column 31 forms a sliding fit with the legs 52 in the gap between the front and rear legs 52. The anti-vibration beam 5 releases the thermal expansion displacement of the heated surface tube panel assembly 1 by sliding down along the guide column 31. The locking block 7 is fixed to the top of the anti-vibration beam 5 and forms a locking structure with the anti-vibration ear plate 4.

[0020] In use, the first and last rows of heating surface tube panels in the heating surface tube panel group 1 are connected to the anti-vibration beam 5 by anti-vibration ear plates 4 and pin shafts 6, respectively. The heating surface tube panel in the middle position is connected to the anti-vibration beam 5 by anti-vibration ear plates 4 in slots 51. The flue gas resistance and seismic horizontal force acting on the heating surface tube panel group 1 can be transmitted to the anti-vibration beam 5 through the anti-vibration ear plates 4. The anti-vibration beam 5 transmits the force to the base 3 through the support legs 52 and guide columns 31, and finally to the furnace bottom plate 2 through the base 3. The anti-vibration beam 5 forms a constraint on the anti-vibration ear plate 4 through the slot 51, the locking block 7 and the pin 6 to limit the displacement of the anti-vibration ear plate 4 in the horizontal direction, thereby preventing the heated surface tube screen from shaking. The first row of heated surface tube panels generates a vertical relative displacement with the anti-vibration beam 5 through the pin slot 41 of its anti-vibration ear plate 4, thereby absorbing and offsetting the thermal expansion displacement difference between the first row and the last row of heated surface tube panels. The heated surface tube panels in the middle position fully release the thermal expansion displacement through their anti-vibration ear plates 4 in the vertical direction defined by the slot 51 and the card block 7, thereby avoiding the risk of the heated surface tube panels bursting due to tension. The downward thermal expansion displacement of the heated surface tube panel assembly 1 is released by the anti-vibration beam 5 sliding downward along the guide column 31.

[0021] Of course, the above-described drawings and embodiments are only for explaining and illustrating this utility model, and should not be construed as improperly limiting this utility model. All technical solutions obtained by those skilled in the art through equivalent adjustments and variations based on this utility model fall within the protection scope of this utility model.

Claims

1. A furnace bottom insert-type anti-vibration device, which is installed at the bottom of a heating surface tube panel assembly (1), and includes a base (3) fixed to a furnace bottom plate (2), anti-vibration ear plates (4) respectively fixed to the lower headers (11) of each tube panel in the heating surface tube panel assembly (1), and an anti-vibration beam (5) horizontally arranged according to the flue gas flow direction. The top of the anti-vibration beam (5) is provided with an axially extending slot (51). The anti-vibration ear plates (4) are arranged in the slot (51) and inserted into the anti-vibration beam (5). The bottom of the anti-vibration beam (5) is slidably connected to the base (3) through a sliding connection structure. In order of flue gas flow direction, the first and last shockproof ear plates (4) are connected to the shockproof beam (5) by pins (6) respectively. The pin hole on the first shockproof ear plate (4) is an oblong pin slot (41).

2. The furnace bottom insert plate type anti-vibration device according to claim 1, characterized in that, The slot (51) passes through the anti-vibration beam (5).

3. A furnace bottom insert-type shockproof device according to claim 1 or 2, characterized in that, It also includes a locking block (7) disposed between adjacent shock-absorbing ear plates (4), the locking block (7) being fixed to the top of the shock-absorbing beam (5).

4. A furnace bottom insert-type shockproof device according to claim 1 or 2, characterized in that, The sliding connection structure includes a pair of legs (52) arranged in front and behind at the lower end of the anti-vibration beam (5) in the order of flue gas flow direction and a guide column (31) standing upright on the base (3). The guide column (31) is inserted into the gap between the front and rear legs (52) to form a sliding fit with the legs (52). The anti-vibration beam (5) releases the thermal expansion displacement of the heated surface tube panel assembly (1) by sliding down along the guide column (31).

Images