Self-adaptive air pre-heater sealing device capable of expanding with heat and contracting with cold

Abstract

The utility model discloses a thermal expansion and cold contraction self-adaptive air pre-heater sealing device, and relates to the technical field of air pre-heaters, in particular to a thermal expansion and cold contraction self-adaptive air pre-heater sealing device which comprises a shell, an air outlet pipe shell, an air inlet pipe shell, a smoke outlet pipe shell, a smoke inlet pipe shell, a pressure sensor and the like. The air preheater is intelligently monitored and controlled through the temperature sensor and the pressure sensor, the temperature sensor can give an alarm in time to guarantee environmental safety, the pressure sensor monitors the state of the air preheater in real time to prevent faults, and intelligent adjustment of the air cylinder outer shell and the bottom shell is combined with temperature monitoring to achieve intelligent control over the air preheater. The sealing device is automatically adjusted according to temperature changes, it is ensured that the sealing effect is stable and reliable, safety and stability are improved, and maintenance cost and fault risks are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheaters, in particular to a thermal expansion and cold contraction adaptive air preheater sealing device. Background Art

[0002] The air preheater sealing device is an important component of the air preheater. The air preheater is a device used to improve the combustion efficiency of the boiler. It exchanges heat between the flue gas before combustion and the flue gas after fuel combustion, thereby transferring the heat generated after the fuel combustion to the air entering the boiler, thereby increasing the air temperature entering the boiler and reducing fuel consumption. The air preheater is usually composed of a metal tube bundle. The flue gas and air exchange heat through the tube bundle. The sealing device is used to ensure that the heat exchange process between the flue gas and the air can be carried out effectively, while preventing flue gas leakage or air leakage to ensure the normal operation of the preheater. The existing air preheater sealing device has no temperature detection function, resulting in the inability to detect temperature abnormalities in time. The existing air preheater sealing device has no pressure detection, resulting in the inability to detect pressure abnormalities in time. The existing air preheater sealing device cannot adjust the sealing performance according to the temperature, which increases the risk of gas leakage or poor sealing. An existing air preheater sealing device (publication number: CN219454005U) at least exposes the following shortcomings during use:

[0003] 1. The existing air preheater sealing device has no temperature detection, which makes it impossible to detect abnormal temperature in time, and there are potential safety hazards and unstable performance problems. Since the working temperature of the air preheater cannot be detected in time, there are potential safety hazards. Excessive temperature may cause aging, deformation or rupture of the sealing material, which may lead to air leakage or other safety problems, and may even cause equipment damage or personal injury. Therefore, an air preheater sealing device with temperature detection is urgently needed.

[0004] 2. The existing air preheater sealing device does not have pressure detection. Due to the lack of pressure detection function, the current air preheater sealing device cannot monitor the pressure changes inside the air preheater in real time, which may lead to the failure to detect abnormal pressure in time, such as excessive or low pressure, thereby increasing the risk of equipment failure or damage. Therefore, an air preheater sealing device with pressure detection is urgently needed.

[0005] 3. The existing air preheater sealing device cannot adjust the sealing performance according to the temperature. Since the current sealing device cannot be adjusted according to temperature changes, the shrinkage and expansion rate of the seal at different temperatures cannot be effectively controlled, resulting in the sealing performance being unstable with temperature changes. This may lead to different sealing effects of the sealing device at different operating temperatures, increasing the risk of gas leakage or poor sealing. Therefore, an air preheater sealing device with adaptive thermal expansion and contraction is urgently needed. Utility Model Content

[0006] The main purpose of the utility model is to provide a thermal expansion and contraction adaptive air preheater sealing device, which can effectively solve the problems in the background technology.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A thermal expansion and contraction adaptive air preheater sealing device comprises a shell, an air outlet pipe shell is installed above the shell, a smoke outlet pipe shell is installed on the left side of the shell, a smoke inlet pipe shell is fixedly installed on the right side of the shell, a temperature sensor is installed below the shell, a cylinder is installed below the temperature sensor, a stretching roller is installed below the cylinder, a bottom shell is connected below the stretching roller, an air inlet pipe shell is installed below the bottom shell, a pressure sensor is installed on the back of the shell, and an external power port is installed above the pressure sensor.

[0009] Preferably, the housing is square in design.

[0010] Preferably, the exhaust pipe housing is circular in design.

[0011] Preferably, the outlet pipe housing and the inlet pipe housing have the same radius.

[0012] Preferably, the outer shell of the smoke outlet pipe and the outer shell of the smoke inlet pipe have the same radius.

[0013] Preferably, the temperature sensor is internally connected to an external power port.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model uses a temperature sensor to ensure safety. Based on the monitoring of the temperature sensor, a temperature threshold is set. Once the ambient temperature exceeds the safe range, the temperature sensor can sound an alarm to remind the operator to take corresponding measures to prevent possible dangerous events.

[0016] 2. The utility model uses a pressure sensor, which can accurately and in real time monitor the pressure conditions of the equipment and provide precise data support. By monitoring pressure changes, problems with the equipment can be discovered in a timely manner, equipment failures can be prevented, and maintenance costs can be reduced. Accurate pressure monitoring helps prevent safety hazards such as equipment overpressure and improves the safety and stability of equipment operation.

[0017] 3. The utility model can realize automatic adjustment of the cylinder shell and the bottom shell through intelligent adjustment under the monitoring of the temperature detector. When the temperature is high, the cylinder does not work and the bottom shell is relaxed, and when the temperature is low, the cylinder works to drive the stretching roller, and the stretching roller drives the bottom shell to tighten. This intelligent adjustment can effectively cope with the changes in sealing performance caused by thermal expansion and contraction, ensuring that the sealing effect always remains intact. This design not only improves the stability and reliability of the sealing device, but also reduces maintenance costs and the risk of equipment failure, providing reliable guarantee for the safe and efficient operation of the air preheater. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0020] In the figure: 1. outer shell; 2. air outlet pipe outer shell; 3. air inlet pipe outer shell; 4. smoke outlet pipe outer shell; 5. smoke inlet pipe outer shell; 6. pressure sensor; 7. temperature sensor; 8. cylinder; 9. stretching roller; 10. bottom shell; 11. external power port. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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.

[0024] Example

[0025] See also Figure 1-2 , the utility model provides a technical solution:

[0026] A thermal expansion and contraction adaptive air preheater sealing device comprises a shell, an air outlet pipe shell is installed above the shell, a smoke outlet pipe shell is installed on the left side of the shell, a smoke inlet pipe shell is fixedly installed on the right side of the shell, a temperature sensor is installed below the shell, a cylinder is installed below the temperature sensor, a stretching roller is installed below the cylinder, a bottom shell is connected below the stretching roller, an air inlet pipe shell is installed below the bottom shell, a pressure sensor is installed on the back of the shell, an external power port is installed above the pressure sensor, the shell is square in design, the air outlet pipe shell is circular in design, the air outlet pipe shell and the air inlet pipe shell have the same radius, the smoke outlet pipe shell and the smoke inlet pipe shell have the same radius, and the temperature sensor is internally connected to the external power port.

[0027] Features Traditional pressure sensor 5800COMBO Series Measurement accuracy 0.5% of full scale 0.05% of full scale Response time Less than 20ms Less than 10ms Output signal ±0.5% FSO ±0.05% FSO

[0028] The pressure sensor described in the utility model preferably adopts the GE Druck PACE series pressure sensor produced by GE Sensing. The pressure sensor has high measurement accuracy, can provide reliable measurement data, improve the overall system performance, support a variety of pressure ranges, from low pressure to high pressure, meet the needs of different application scenarios, have good corrosion resistance, can work in a variety of chemical environments, has a fast response time, can effectively respond to pressure changes, and is suitable for dynamic measurement occasions.

[0029] In the utility model, the shell is an external protective shell of an integral structure, which is used to accommodate and fix other components. The exhaust pipe shell is installed above the shell, and is a pipe shell for discharging air. The intake pipe shell is fixedly installed on the right side of the shell, and may be a pipe shell for air intake. The smoke outlet pipe shell is installed on the left side of the shell, and is a pipe shell for discharging smoke. The smoke inlet pipe shell is fixedly installed on the right side of the shell, and may be a pipe shell for introducing smoke. The pressure sensor is installed on the back of the shell, and is used to monitor the pressure change inside the system to ensure the stability and safety of the system operation. The temperature sensor is installed below the shell, and is used to monitor the temperature change inside the system to ensure that the system operates within a safe temperature range. The cylinder is installed below the temperature sensor, and is used to control the movement of the stretching roller to adjust the tightness of the sealing device. The stretching roller is installed below the cylinder, and is used to adjust the position of the bottom shell to adapt to the changes in thermal expansion and contraction, thereby maintaining the effect of the sealing device. The bottom shell is connected below the stretching roller, and may be used to fix the bottom of the sealing device, and together with other components, it constitutes a part of the sealing system. The external power supply port is installed above the pressure sensor, and is used to provide power supply to the external power supply of the pressure sensor and the temperature sensor, so as to ensure the normal operation of the sensor.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A thermal expansion and contraction adaptive air preheater sealing device, comprising a housing (1), characterized in that: An air outlet pipe housing (2) is installed above the housing (1), a smoke outlet pipe housing (4) is installed on the left side of the housing (1), a smoke inlet pipe housing (5) is fixedly installed on the right side of the housing (1), a temperature sensor (7) is installed below the housing (1), a cylinder (8) is installed below the temperature sensor (7), a stretching roller (9) is installed below the cylinder (8), a bottom housing (10) is connected below the stretching roller (9), an air inlet pipe housing (3) is installed below the bottom housing (10), a pressure sensor (6) is installed on the back of the housing (1), and an external power supply port (11) is installed above the pressure sensor (6).

2. The thermal expansion and contraction adaptive air preheater sealing device according to claim 1, characterized in that: The housing (1) is square in design.

3. The thermal expansion and contraction adaptive air preheater sealing device according to claim 1, characterized in that: The air outlet pipe housing (2) is designed to be circular.

4. The thermal expansion and contraction adaptive air preheater sealing device according to claim 1, characterized in that: The air outlet pipe housing (2) and the air inlet pipe housing (3) have the same radius.

5. The thermal expansion and contraction adaptive air preheater sealing device according to claim 1, characterized in that: The smoke outlet pipe housing (4) and the smoke inlet pipe housing (5) have the same radius.

6. The thermal expansion and contraction adaptive air preheater sealing device according to claim 1, characterized in that: The temperature sensor (7) is internally connected to an external power port (11).

Images