Sliding base for low-temperature economizer of coal-fired boiler

Abstract

The utility model discloses a sliding base for a low-temperature economizer of a coal-fired boiler, which comprises a low-temperature economizer body arranged on a bottom plate and a telescopic component arranged on the bottom plate and used for providing a telescopic space for displacement of the low-temperature economizer body under temperature change. The telescopic assembly comprises two dovetail grooves which are symmetrically formed in the bottom plate, and dovetail plates are slidably connected into the two dovetail grooves. According to the low-temperature economizer, through the arrangement of the telescopic assembly, a telescopic space is provided for the low-temperature economizer body, so that stress generated by thermal expansion and cold contraction of the low-temperature economizer body is effectively transmitted to the bottom plate, and accumulation of the stress on the low-temperature economizer body is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature economizers, in particular to a sliding base for a low-temperature economizer of a coal-fired boiler. Background Art

[0002] The low-temperature economizer is installed on the tail flue of the boiler. It absorbs the waste heat in the flue gas through condensed water or other media, reduces the exhaust gas temperature and improves the thermal efficiency of the boiler.

[0003] During the use of the low-temperature economizer, it will be affected by thermal expansion and contraction. Since the low-temperature economizer is fixedly installed on the tail flue of the boiler, it is difficult for it to adapt to the overall size changes caused by temperature changes, which can easily cause stress concentration and equipment damage, thus affecting the service life of the low-temperature economizer.

[0004] Therefore, there is an urgent need for a sliding base for a low-temperature economizer of a coal-fired boiler to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the technical problem that the utility model intends to solve is to provide a sliding base for a low-temperature economizer of a coal-fired boiler to solve the problem of difficulty in adapting to overall dimensional changes caused by temperature changes raised in the above background technology.

[0006] The utility model solves the technical problem by providing a sliding base for a low-temperature economizer of a coal-fired boiler, comprising a low-temperature economizer body arranged on a bottom plate, and a telescopic component arranged on the bottom plate for providing a telescopic space for the displacement of the low-temperature economizer body under temperature changes;

[0007] The telescopic assembly includes two symmetrical dovetail grooves opened on the bottom plate, dovetail plates are slidably connected in the two dovetail grooves, one end of the two dovetail plates is connected to the low-temperature economizer body, and a support assembly for supporting the low-temperature economizer body is provided on the bottom plate.

[0008] The support assembly includes two support plates symmetrically arranged on the bottom plate, the two support plates are rotatably connected with support rods, the side walls of the two support rods are slidably connected with support tubes, the opposite ends of the two support tubes are connected to the low-temperature economizer body through a connecting assembly, the two support tubes are slidably connected with sliding plates, the other ends of the two support rods are connected to the sliding plates, the side walls of the two support rods are sleeved with first springs, and the two ends of the first springs are respectively connected to the sliding plates and the inner walls of the support tubes.

[0009] The two support plates are provided with four bolts which are symmetrically arranged in pairs, and the bottom plate is provided with four threaded holes, which are matched with the bolts.

[0010] The connecting assembly includes two symmetrically arranged connecting plates fixedly connected to the low-temperature economizer body on one side close to the support tube, a T-bar is inserted between the two connecting plates, the side wall of the T-bar is rotatably connected with a rotating plate, one end of the rotating plate is connected to the support tube, and the T-bar is provided with a limiting assembly for limiting the connection plate.

[0011] The limit assembly includes a limit cavity formed on a T-shaped rod, the limit cavity has two through holes symmetrically arranged with each other, the two through holes are slidably connected to limit rods, the two limit rods are located on the side walls of the limit cavity and are fixedly connected with fixing rings, the side walls of the two limit rods are sleeved with second springs, the two ends of the second springs are respectively connected to the inner wall of the limit cavity and the fixing ring, and the limit cavity is provided with a driving assembly for driving the two limit rods.

[0012] The driving assembly includes a conical block slidably connected to the limiting cavity, the opposite ends of the two limiting rods slide on the side walls of the conical block, one end of the conical block is connected to the bottom wall of the limiting cavity through a guide sleeve, the limiting cavity is threadedly connected with a threaded rod, one end of the threaded rod is rotatably connected to the conical block, and the other end of the threaded rod passes through the limiting cavity and is fixedly connected to a rotating disk.

[0013] Compared with the prior art, the beneficial effect of the utility model is that: the utility model provides a telescopic space for the low-temperature economizer body through the setting of the telescopic component, thereby effectively transferring the stress caused by thermal expansion and contraction of the low-temperature economizer body to the bottom plate, thereby avoiding the accumulation of stress on the low-temperature economizer body itself, and at the same time, under the flexible support of the support component, the expansion of the low-temperature economizer body is absorbed, thereby reducing the impact of temperature changes on the low-temperature economizer body, and further ensuring the normal service life of the low-temperature economizer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the support assembly of the utility model;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 This is a schematic diagram of the internal structure of the limit assembly of the utility model;

[0018] Figure 5 It is a schematic diagram of the internal structure of the telescopic component of the utility model.

[0019] In the figure: 101, bottom plate; 102, low-temperature economizer body; 201, dovetail groove; 202, dovetail plate; 301, support plate; 302, bolt; 303, threaded hole; 304, support rod; 305, support tube; 306, sliding plate; 307, first spring; 401, connecting plate; 402, T-bar; 403, rotating plate; 501, through hole; 502, limit rod; 503, fixing ring; 504, second spring; 505, limit cavity; 601, conical block; 602, guide sleeve; 603, threaded rod; 604, rotating disk. DETAILED DESCRIPTION

[0020] The specific embodiments of the present invention are given below. The specific embodiments are only used to further illustrate the present invention in detail and do not limit the protection scope of the present invention.

[0021] Example 1

[0022] See also Figure 1-Figure 5 , a sliding base for a low-temperature economizer of a coal-fired boiler shown in the figure includes a low-temperature economizer body 102 arranged on a bottom plate 101, and also includes a telescopic component arranged on the bottom plate 101 for providing a telescopic space for the displacement of the low-temperature economizer body 102 under temperature changes;

[0023] The telescopic assembly includes two mutually symmetrical dovetail grooves 201 opened on the bottom plate 101, dovetail plates 202 are slidably connected in the two dovetail grooves 201, one end of the two dovetail plates 202 is connected to the low-temperature economizer body 102, and a support assembly for supporting the low-temperature economizer body 102 is provided on the bottom plate 101;

[0024] It should be noted here that: by setting the telescopic component, a telescopic space is provided for the low-temperature economizer body 102, thereby effectively transferring the stress caused by thermal expansion and contraction of the low-temperature economizer body 102 to the bottom plate 101, thereby avoiding the accumulation of stress on the low-temperature economizer body 102 itself. At the same time, under the flexible support of the support component, the expansion of the low-temperature economizer body 102 is absorbed, thereby reducing the impact of temperature changes on the low-temperature economizer body 102, and further ensuring the normal service life of the low-temperature economizer body 102.

[0025] It is worth noting that: the connecting part of the air inlet pipe and the air outlet pipe on the low-temperature economizer body 102 is provided with a bellows, so as to provide a telescopic space for the movement of the low-temperature economizer body 102 when it is convenient to connect with the boiler.

[0026] See also Figure 3The support assembly shown in the figure includes two support plates 301 symmetrically arranged on the bottom plate 101, the two support plates 301 are rotatably connected with support rods 304, the side walls of the two support rods 304 are slidably connected with support tubes 305, the opposite ends of the two support tubes 305 are connected to the low-temperature economizer body 102 through a connecting assembly, the two support tubes 305 are slidably connected with sliding plates 306, the other ends of the two support rods 304 are connected to the sliding plates 306, the side walls of the two support rods 304 are sleeved with first springs 307, and the two ends of the two first springs 307 are respectively connected to the sliding plates 306 and the inner walls of the support tubes 305;

[0027] It should be noted here that: by setting the support assembly, while ensuring the firmness of the installation and connection of the low-temperature economizer body 102, the expansion of the low-temperature economizer body 102 is absorbed by utilizing the flexible support effect.

[0028] See also Figure 3 and Figure 5 , the two support plates 301 shown in the figure are provided with four bolts 302 arranged symmetrically in pairs, and the bottom plate 101 is provided with four threaded holes 303, and the four threaded holes 303 are matched with the bolts 302;

[0029] It should be noted here that the support plate 301 can be easily installed and fixed by providing the bolts 302 and the threaded holes 303 .

[0030] Working principle: When installing the low-temperature economizer body 102, firstly, under the sliding guide action of the dovetail groove 201 and the dovetail plate 202, the low-temperature economizer body 102 is installed on the bottom plate 101, and then the two supporting components are installed on both sides of the low-temperature economizer body 102 by using the connecting components, so as to support the low-temperature economizer body 102 and ensure the installation and connection firmness of the low-temperature economizer body 102;

[0031] After the installation of the low-temperature economizer body 102 is completed, the air inlet pipe can be connected to the tail flue of the boiler, so that the waste heat in the flue gas can be absorbed by condensed water or other media, the exhaust temperature of the flue gas can be reduced, and the thermal efficiency of the boiler can be improved. During the use of the low-temperature economizer body 102, it will be affected by thermal expansion and contraction, so that its overall size will change under temperature changes. This change will cause the entire equipment to be displaced or deformed. During the displacement of the low-temperature economizer body 102, the sliding action of the dovetail groove 201 and the dovetail plate 202 will provide a telescopic space for the low-temperature economizer body 102, thereby effectively transferring the stress generated by the thermal expansion and contraction of the low-temperature economizer body 102 to the bottom plate 101, thereby avoiding the accumulation of stress on the low-temperature economizer body 102 itself. At the same time, under the flexible support of the support assembly, the expansion of the low-temperature economizer body 102 is absorbed, thereby reducing the impact of temperature changes on the low-temperature economizer body 102, and further ensuring the normal service life of the low-temperature economizer body 102.

[0032] Example 2

[0033] See also Figure 3 , this embodiment further explains Example 1, the connecting assembly in the figure includes two symmetrically arranged connecting plates 401 fixedly connected to the low-temperature economizer body 102 near the side of the support tube 305, a T-shaped rod 402 is inserted between the two connecting plates 401, and a rotating plate 403 is rotatably connected to the side wall of the T-shaped rod 402, one end of the rotating plate 403 is connected to the support tube 305, and a limiting assembly for limiting the connection plate 401 is provided on the T-shaped rod 402;

[0034] It should be noted here that: through the setting of the connecting component, when connecting the support tube 305 and the low-temperature economizer body 102, the support tube 305 is first rotated, and the rotating plate 403 at one end of the support tube 305 is located between the two connecting plates 401, and then the T-bar 402 is inserted into the two connecting plates 401 and the rotating plate 403, and under the action of the limiting component, the T-bar 402 is limited, thereby further realizing the connection limit between the support tube 305 and the low-temperature economizer body 102.

[0035] See also Figure 4The limiting assembly shown in the figure includes a limiting cavity 505 provided on the T-shaped rod 402, and two through holes 501 symmetrically arranged are provided on the limiting cavity 505, and the limiting rods 502 are slidably connected to the two through holes 501, and the two limiting rods 502 are located on the side wall of the limiting cavity 505 and are fixedly connected with a fixing ring 503, and the side walls of the two limiting rods 502 are sleeved with second springs 504, and the two ends of the two second springs 504 are respectively connected to the inner wall of the limiting cavity 505 and the fixing ring 503, and the limiting cavity 505 is provided with a driving assembly for driving the two limiting rods 502;

[0036] It should be noted here that: through the setting of the limit assembly, under the action of the driving assembly, the two limit rods 502 will be pushed away from each other, so that the two limit rods 502 are moved out of the limit cavity 505, and the T-bar 402 is further limited by the blocking effect of the two limit rods 502.

[0037] See also Figure 4 The driving assembly shown in the figure includes a conical block 601 slidably connected to the limiting cavity 505, the opposite ends of the two limiting rods 502 slide on the side wall of the conical block 601, one end of the conical block 601 is connected to the bottom wall of the limiting cavity 505 through a guide sleeve 602, the limiting cavity 505 is threadedly connected with a threaded rod 603, one end of the threaded rod 603 is rotatably connected to the conical block 601, and the other end of the threaded rod 603 is arranged to penetrate the limiting cavity 505 and is fixedly connected to a rotating disk 604;

[0038] It should be noted here that: through the setting of the driving component, in the process of rotating the rotating disk 604, the threaded rod 603 will be driven to rotate, so that under the threaded engagement transmission action of the threaded rod 603 and the guiding action of the guide sleeve 602, the conical block 601 will be driven to move, and further under the interaction between the conical block 601 and the two limit rods 502 and the guiding action of the through hole 501, the two limit rods 502 will be pushed to move away from each other.

[0039] Anything not described in the present invention is applicable to the prior art.

Claims

1. A sliding base for a low-temperature economizer of a coal-fired boiler, comprising: A low-temperature economizer body (102) disposed on a bottom plate (101); It is characterized by further comprising: A telescopic component disposed on the bottom plate (101) for providing a telescopic space for the displacement of the low-temperature economizer body (102) under temperature changes; The telescopic assembly comprises two symmetrically arranged dovetail grooves (201) opened on the bottom plate (101), dovetail plates (202) are slidably connected in the two dovetail grooves (201), one end of the two dovetail plates (202) is connected to the low-temperature economizer body (102), and a support assembly for supporting the low-temperature economizer body (102) is provided on the bottom plate (101).

2. The sliding base for a low-temperature economizer of a coal-fired boiler according to claim 1, characterized in that: The support assembly includes two support plates (301) symmetrically arranged on the bottom plate (101), the two support plates (301) are rotatably connected with support rods (304), the side walls of the two support rods (304) are slidably connected with support tubes (305), the opposite ends of the two support tubes (305) are connected to the low-temperature economizer body (102) through a connecting assembly, the two support tubes (305) are slidably connected with a sliding plate (306), the other ends of the two support rods (304) are connected to the sliding plate (306), the side walls of the two support rods (304) are sleeved with a first spring (307), and the two ends of the two first springs (307) are respectively connected to the sliding plate (306) and the inner wall of the support tube (305).

3. The sliding base for a low-temperature economizer of a coal-fired boiler according to claim 2, characterized in that: The two support plates (301) are provided with four bolts (302) symmetrically arranged in pairs, and the bottom plate (101) is provided with four threaded holes (303), and the four threaded holes (303) are matched with the bolts (302).

4. The sliding base for a low-temperature economizer of a coal-fired boiler according to claim 2, characterized in that: The connection assembly comprises two symmetrically arranged connection plates (401) fixedly connected to the low-temperature economizer body (102) on one side close to the support tube (305), a T-shaped rod (402) is inserted between the two connection plates (401), the side wall of the T-shaped rod (402) is rotatably connected to a rotating plate (403), one end of the rotating plate (403) is connected to the support tube (305), and the T-shaped rod (402) is provided with a limiting assembly for limiting the connection plate (401).

5. The sliding base for a low-temperature economizer of a coal-fired boiler according to claim 4, characterized in that: The limiting assembly comprises a limiting cavity (505) provided on a T-shaped rod (402), the limiting cavity (505) being provided with two mutually symmetrical through holes (501), the two through holes (501) being slidably connected to limiting rods (502), the two limiting rods (502) being located on the side walls of the limiting cavity (505) and being fixedly connected to a fixing ring (503), the side walls of the two limiting rods (502) being sleeved with a second spring (504), the two ends of the two second springs (504) being respectively connected to the inner wall of the limiting cavity (505) and the fixing ring (503), and the limiting cavity (505) being provided with a driving assembly for driving the two limiting rods (502).

6. The sliding base for a low-temperature economizer of a coal-fired boiler according to claim 5, characterized in that: The driving assembly comprises a conical block (601) slidably connected to the limiting cavity (505); opposite ends of the two limiting rods (502) slide on the side wall of the conical block (601); one end of the conical block (601) is connected to the bottom wall of the limiting cavity (505) through a guide sleeve (602); the limiting cavity (505) is threadedly connected with a threaded rod (603); one end of the threaded rod (603) is rotatably connected to the conical block (601); the other end of the threaded rod (603) passes through the limiting cavity (505) and is fixedly connected to a rotating disk (604).

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