Rapid leaking stoppage device for boiler flue of thermal power plant

Abstract

The utility model discloses a thermal power plant boiler flue rapid leaking stoppage device which comprises a plugging plate, a square adsorption cavity is formed in the lower side face of the plugging plate, an exhaust pipe communicated with the adsorption cavity is arranged on the upper side face of the plugging plate, an air valve is arranged on the exhaust pipe, and the air valve is communicated with the adsorption cavity. The end, extending out of the plugging plate, of the exhaust pipe can be connected with an external vacuumizing device, sealing gaskets located on the lower side face of the plugging plate are arranged on the two sides of the adsorption cavity correspondingly, and a plurality of expansion screws are arranged on the upper side face of the plugging plate in a rectangular array mode. The sealing structure has the advantage of being good in sealing effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of boiler flue leak stoppage, and relates to a rapid leak stoppage device for a thermal power plant boiler flue. Background Art

[0002] During the operation of a thermal power plant boiler, due to the long-term erosion and corrosion of high-temperature flue gas, particulate matter, etc., the flue is prone to leakage points; these leakage points will cause flue gas leakage, which not only affects the on-site environment, endangers the health of operators, but also causes energy waste and reduces the boiler operation efficiency. At present, the existing flue leak stoppage methods have problems such as slow leak stoppage speed and poor effect, affecting the normal production of the power plant;

[0003] The Chinese utility model patent with the authorization announcement number CN213451659U discloses a GGH sealing and leak stoppage device, including a base plate placed between the flue sealing frame and the shell crack, a backing plate arranged parallel to the base plate, a gasket placed between the backing plate and the base plate, and fixing bolts for fixing the backing plate. This technical solution welds the base plate, backing plate, and gasket between the sealing frame and the shell crack. During implementation, the base plate is symmetrically arranged on the gap, the backing plate is arranged parallel to the base plate, and the gasket is fixed in the gap between the two base plates and the backing plate to block the gap between the sealing frame and the shell in the flue. However, this technology only uses the backing plate and the gasket for sealing, and the sealing effect is limited during use, which may affect the use of the plugging device. Summary of the Utility Model

[0004] In view of the above problems, the utility model proposes a rapid leak stoppage device for a thermal power plant boiler flue, which well solves the problems in the prior art.

[0005] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: A rapid leak stoppage device for a thermal power plant boiler flue includes a plugging plate. An "口"-shaped adsorption cavity is opened on the lower side of the plugging plate. An air extraction pipe communicated with the adsorption cavity is arranged on the upper side of the plugging plate. An air valve is arranged on the air extraction pipe. One end of the air extraction pipe extending out of the plugging plate can be connected to an external vacuum device. Flexible sealing gaskets are arranged on both sides of the adsorption cavity on the lower side of the plugging plate. A plurality of expansion screws are arranged in a rectangular array on the upper side of the plugging plate.

[0006] Further, the material of the flexible sealing gasket is silicone rubber.

[0007] Further, a sealing gasket fitting with the upper side of the plugging plate is arranged on the expansion screw.

[0008] Further, a high molecular wear-resistant glue is coated on the lower side of the plugging plate, and the high molecular wear-resistant glue is located inside the sealing gasket.

[0009] Furthermore, two grippers are symmetrically arranged on the upper side of the plugging plate, left and right.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model realizes the multi-stage sealing and fixing of the plugging plate on the flue wall through the adsorption cavity, the air extraction pipe, the air valve, the flexible sealing gasket and the expansion screw, ensuring the sealing effect of the plugging plate on the flue wall. The further bonding between the plugging plate and the flue wall is realized through the high molecular wear-resistant glue, improving the connection strength between the plugging plate and the flue wall. The grasping and placement of the plugging plate are realized through the gripper, improving the convenience for the staff during installation. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the utility model;

[0013] Figure 2 is a top view of the utility model;

[0014] Figure 3 is a bottom view of the utility model.

[0015] In the figure, 1 is the plugging plate; 101 is the adsorption cavity; 2 is the expansion screw; 3 is the air extraction pipe; 4 is the air valve; 5 is the gripper; 6 is the high molecular wear-resistant glue; 7 is the flexible sealing gasket; 8 is the sealing gasket. Detailed Embodiment

[0016] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts shall fall within the protection scope of the utility model.

[0017] As Figure 1-3 shown, a rapid leak plugging device for a boiler flue in a thermal power plant includes a plugging plate 1. An "O"-shaped adsorption cavity 101 is opened on the lower side of the plugging plate 1. An air extraction pipe 3 communicating with the adsorption cavity 101 is threadedly connected to the upper side of the plugging plate 1. An air valve 4 is installed on the air extraction pipe 3. One end of the air extraction pipe 3 extending out of the plugging plate 1 can be connected to an external vacuum extraction device. Flexible sealing gaskets 7 are arranged on both sides of the adsorption cavity 101 and are located on the lower side of the plugging plate 1. Multiple expansion screws 2 arranged in a rectangular array are threadedly connected to the upper side of the plugging plate 1.

[0018] During use, the operator attaches the lower side of the sealing plate 1 to the leak point in the boiler flue. Then, the operator connects the extraction pipe 3 to an external vacuum device. After connection, the operator opens the air valve 4 and starts the vacuum device. Under the action of the vacuum device, the air in the adsorption chamber 101 is extracted, and the atmospheric pressure in the adsorption chamber 101 increases, thereby causing the sealing plate 1 to be adsorbed onto the boiler flue. Furthermore, the flexible sealing gasket 7 can compensate for the sealing defects caused by minor unevenness on the surface of the boiler flue, improving the vacuum adsorption effect. After the sealing plate 1 is adsorbed onto the surface of the boiler flue by vacuum, the operator closes the air valve 4 and the vacuum device. Then, the operator fixes the sealing plate 1 onto the boiler flue with the expansion screw 2, further improving the sealing effect of the sealing plate 1 on the leak point in the boiler flue and ensuring the reliability of the rapid leak sealing device during use.

[0019] In this embodiment, the flexible sealing gasket 7 is made of silicone rubber. When in use, the flexibility and high temperature resistance of silicone rubber improve the overall sealing effect of the flexible sealing gasket 7.

[0020] In this embodiment, a sealing gasket 8 is fitted on the expansion screw 2 and fits against the upper side of the sealing plate 1. During use, the sealing gasket 8 ensures that the expansion screw 2 and the sealing plate 1 are in sealed contact, preventing air from flowing out along the gap between the expansion screw 2 and the sealing plate 1.

[0021] In this embodiment, the lower side of the sealing plate 1 is coated with a polymer wear-resistant adhesive 6, which is located inside the sealing gasket. The polymer wear-resistant adhesive 6 can still maintain good adhesion at high temperatures. On the one hand, it can enhance the sealing between the sealing plate 1 and the flue wall, and on the other hand, it can play a buffering and wear-resistant role, extending the service life of the rapid leak sealing device.

[0022] In this embodiment, two grippers 5 are symmetrically arranged on the upper side of the sealing plate 1 by bolts. When in use, the staff can grab the two grippers 5 to place the sealing plate 1 on the flue wall, which improves the convenience of the staff during installation.

[0023] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A rapid leak-sealing device for boiler flue gas in thermal power plants, comprising a sealing plate, characterized in that: The lower side of the plugging plate is provided with an "口"-shaped adsorption cavity, the upper side of the plugging plate is provided with an air extraction pipe communicated with the adsorption cavity, an air valve is arranged on the air extraction pipe, one end of the air extraction pipe extending out of the plugging plate can be connected with an external vacuum extraction device, flexible sealing gaskets are arranged on both sides of the adsorption cavity and located on the lower side of the plugging plate, and a plurality of expansion screws are arranged on the upper side of the plugging plate in a rectangular array.

2. The rapid leak-sealing device for boiler flue gas in thermal power plants according to claim 1, characterized in that: The material of the flexible sealing gasket is silicone rubber.

3. The rapid leak-sealing device for boiler flue gas in thermal power plants according to claim 1, characterized in that: Sealing gaskets are arranged on the expansion screws and are in contact with the upper side of the plugging plate.

4. The rapid leak-sealing device for boiler flue gas in thermal power plants according to claim 1, characterized in that: The lower side of the plugging plate is coated with a polymer wear-resistant glue, and the polymer wear-resistant glue is located inside the sealing gasket.

5. A rapid leak-sealing device for boiler flue gas in thermal power plants according to claim 1, characterized in that: Two handles are symmetrically arranged on the left and right on the upper side of the plugging plate.

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