Boiler heating surface tube furnace wall temperature over temperature monitoring device

Abstract

This utility model relates to the field of boiler heating surface tube monitoring technology, and discloses a boiler heating surface tube furnace inner wall temperature over-temperature monitoring device, including a boiler body. A boiler body cover is fixedly connected to one end of the boiler body. A heating structure is fixedly connected to the lower center of the side wall of the boiler body cover away from the boiler body. The output end of the heating structure passes through the side wall of the boiler body cover and extends into the interior of the boiler body, and the end is fixedly connected to a heating surface tube. Multiple mounting slots are provided on the outer wall of the heating surface tube, and a monitor housing is installed inside each of the multiple mounting slots. In this utility model, before installation, a cooling dry ice is used to cool and shrink the expansion seat. After shrinkage, it is inserted into the mounting slot. After cooling to room temperature, the expansion seat returns to its original size, facilitating installation. After heating, the expansion and compression of the rubber layer increases the connection, and the high-temperature deformation resistance of the monitor housing reduces the impact of heat.

Description

Technical Field

[0001] This utility model relates to the field of boiler heating surface tube monitoring technology, and in particular to a boiler heating surface tube furnace inner wall temperature over-temperature monitoring device. Background Technology

[0002] A boiler is a device that converts the chemical energy of fuel into thermal energy and transfers that thermal energy to water or other working fluids to produce steam or hot water. It is widely used in power generation, industrial production, heating and other fields. The boiler heating surface tube furnace is an important component of the boiler, mainly responsible for transferring the heat generated by fuel combustion to the working fluid to produce steam or hot water. The boiler heating surface tube furnace operates in a high temperature and high pressure environment, and accurate monitoring of its inner wall temperature is crucial for preventing overheating and tube rupture, and for improving equipment safety and operating efficiency.

[0003] Existing boiler heating surface tube furnace inner wall temperature overheating monitoring devices still have some problems. After the monitoring device is installed, the difference in the metal expansion coefficient at high temperature causes the gap between the thermocouple and the tube wall to increase, the contact resistance to rise and cause measurement deviation. The vertically installed sheath tube expands axially under high temperature conditions, resulting in bending deformation. Therefore, those skilled in the art provide a boiler heating surface tube furnace inner wall temperature overheating monitoring device to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a boiler heating surface tube furnace inner wall temperature overheat monitoring device. Before installation, the expansion seat is cooled and shrunk using cooling dry ice. After shrinkage, it is inserted into the installation groove. After cooling to room temperature, the expansion seat returns to its original size, facilitating installation. After heating, the expansion and compression of the rubber layer increases the connectivity and the high-temperature deformation resistance of the monitor shell reduces the impact of heat.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a boiler heating surface tube furnace inner wall temperature over-temperature monitoring device, comprising a boiler body, a furnace body cover fixedly connected to one end of the boiler body, a heating structure fixedly connected to the lower center of the side wall of the furnace body cover away from the boiler body, the output end of the heating structure penetrating through the side wall of the furnace body cover to the interior of the boiler body, and a heating surface tube fixedly connected to the end, a plurality of mounting grooves provided on the outer wall of the heating surface tube, a monitor housing provided inside each of the plurality of mounting grooves, and a mounting structure provided at the lower part of the outer wall of each of the plurality of monitor housings;

[0006] Taking one of the installation structures as an example, the installation structure includes two limiting grooves, which are arranged vertically on the lower part of the inner sidewall of the installation groove. A storage groove is provided on the outer sidewall of the monitor housing located inside the two limiting grooves. A groove is provided on the upper and lower inner sidewalls of the two storage grooves. A base is provided inside the two grooves. An expansion seat is provided on the outer sidewall of the two bases. Two rubber layers are sleeved on the outer side of the two expansion seats and the outer side of the two bases.

[0007] With the above technical solution, during use, multiple rubber layers at the bottom of multiple monitor housings and multiple bases are inserted into cooling dry ice. The bases shrink upon cooling and are then inserted into the mounting grooves, allowing multiple expansion seats to be inserted into multiple limiting grooves. After the multiple expansion seats return to room temperature, they restore their dimensions, and the monitor housings are installed. During use, the monitors expand due to heat, compressing the rubber layers. The thermal expansion characteristics are used to increase the connection, and the monitor housings are resistant to high-temperature deformation, reducing the impact of heat.

[0008] Furthermore, each of the multiple monitor housings is equipped with a monitoring sensor, and each of the multiple monitoring sensors is equipped with a flexible thermal pad inside the multiple monitor housings near the end of the heated surface tube.

[0009] The above technical solution uses a flexible heat-conducting pad to absorb the temperature of the inner tube and transmit it to the monitoring sensor for monitoring.

[0010] Furthermore, the heated surface tube includes an inner tube and an outer tube, with the outer tube sleeved on the outside of the inner tube;

[0011] The above technical solution facilitates the creation of installation slots by using the inner and outer tubes.

[0012] Furthermore, the monitor housing includes a reflective layer, a molybdenum foil thermal radiation shielding layer is fixedly connected to the inner wall of the reflective layer, and an aerogel layer is fixedly connected to the inner wall of the molybdenum foil thermal radiation shielding layer.

[0013] Through the above technical solutions, the surface coating of the reflective layer reduces its own thermal radiation emissivity by controlling the roughness and optical interference effect, thus suppressing the leakage of internal heat. The infrared absorption of molybdenum reduces the thermal radiation penetration rate by selectively reflecting radiation in this band. The low thermal conductivity of silica aerogel achieves zero convection insulation and improves the monitoring accuracy of the temperature influence monitoring sensor inside the boiler furnace.

[0014] Furthermore, all of the aforementioned expansion seats are made of high-expansion stainless steel;

[0015] The above technical solution utilizes the thermal expansion and contraction properties of high-expansion stainless steel to provide higher connectivity under heat.

[0016] Furthermore, the material of multiple of the aforementioned flexible thermal pads is graphene rubber;

[0017] Through the above technical solution, graphene rubber, by combining graphene nanosheets with a rubber matrix, not only improves the efficiency of heat conduction, but also has a flexible design that makes it easier to fit the inner tube.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, when using the boiler heating surface tube furnace inner wall temperature over-temperature monitoring device, multiple rubber layers at the bottom of multiple monitor housings and multiple bases are inserted into cooling dry ice. The bases shrink upon cooling and are then inserted into the installation groove, allowing multiple expansion seats to be inserted into multiple limiting grooves. After the multiple expansion seats return to normal temperature, they restore their dimensions and the monitor housing is installed. During use, the monitor housing expands due to heat, compressing the rubber layers. The thermal expansion characteristics are used to increase the connection, and the monitor housing is resistant to high-temperature deformation, reducing the impact of heat.

[0020] 2. In this utility model, the surface coating of the overreflective layer reduces its own thermal radiation emissivity by controlling the roughness and optical interference effect, thus suppressing the leakage of internal heat. The infrared absorption of molybdenum reduces the thermal radiation penetration rate by selectively reflecting radiation in this band. The silica aerogel has a low thermal conductivity, achieving zero convection insulation and improving the monitoring accuracy of the temperature influence monitoring sensor inside the boiler furnace. Attached Figure Description

[0021] Figure 1 This is a perspective view of a boiler heating surface tube furnace inner wall temperature over-temperature monitoring device proposed in this utility model;

[0022] Figure 2 This is a three-dimensional sectional view of a boiler heating surface tube furnace inner wall temperature over-temperature monitoring device proposed in this utility model;

[0023] Figure 3 This is a perspective view of the heating surface tube body of a boiler heating surface tube furnace inner wall temperature over-temperature monitoring device proposed in this utility model;

[0024] Figure 4 This is a three-dimensional sectional view of the outer casing of a boiler heating surface tube furnace inner wall temperature over-temperature monitoring device proposed in this utility model.

[0025] Figure 5 for Figure 2 Enlarged diagram of point A in the middle.

[0026] Legend:

[0027] 1. Boiler body; 2. Boiler cover; 3. Heating structure; 4. Heating surface tubes; 5. Monitor housing; 6. Mounting groove; 7. Mounting structure; 8. Flexible thermal conductive pad; 9. Monitoring sensor;

[0028] 401. Inner tube; 402. Outer tube;

[0029] 501. Reflective layer; 502. Molybdenum foil thermal radiation shielding layer; 503. Aerogel layer;

[0030] 701, limiting groove; 702, storage groove; 703, groove; 704, expansion seat; 705, base; 706, rubber layer. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1-5 The present invention provides an embodiment of a boiler heating surface tube furnace inner wall temperature over-temperature monitoring device, comprising a boiler body 1, a furnace body cover 2 fixedly connected to one end of the boiler body 1, a heating structure 3 fixedly connected to the lower center of the side wall of the furnace body cover 2 away from the boiler body 1, the output end of the heating structure 3 passing through the side wall of the furnace body cover 2 to the interior of the boiler body 1, and a heating surface tube 4 fixedly connected to the end, a plurality of mounting grooves 6 provided on the outer wall of the heating surface tube 4, a monitor housing 5 provided inside the plurality of mounting grooves 6, and a mounting structure 7 provided at the lower part of the outer wall of the plurality of monitor housings 5.

[0033] like Figure 2 , 3As shown in Figures 4 and 5, taking one of the mounting structures 7 as an example, the mounting structure 7 includes two limiting grooves 701. The two limiting grooves 701 are arranged vertically on the lower part of the inner side wall of the mounting groove 6. Storage grooves 702 are provided on the outer side wall of the monitor housing 5 located inside the two limiting grooves 701. Grooves 703 are provided on the upper and lower inner side walls of the two storage grooves 702. Bases 705 are provided inside the two grooves 703. Expansion seats 704 are provided on the outer side walls of the two bases 705. An expansion seat 704 is sleeved on the outer side of the two expansion seats 704 and the outer side of the two bases 705. Two rubber layers 706 are used. In use, multiple rubber layers 706 and multiple bases 705 at the bottom of multiple monitor housings 5 ​​are inserted into cooling dry ice. The bases 705 shrink when cooled and are then inserted into the mounting grooves 6, so that multiple expansion seats 704 are inserted into multiple limiting grooves 701. After the multiple expansion seats 704 return to room temperature, they restore their size and are used to install the monitor housings 5. During use, they expand due to heat, compressing the rubber layers 706. The thermal expansion characteristics are used to increase the connection. The monitor housings 5 ​​are resistant to high-temperature deformation and reduce the impact of heat.

[0034] Multiple monitor housings 5 ​​are equipped with monitoring sensors 9 inside. Multiple monitoring sensors 9 are equipped with flexible heat-conducting pads 8 inside the multiple monitor housings 5 ​​near the heated surface tube 4. The flexible heat-conducting pads 8 absorb the temperature of the inner tube 401 and transmit it to the monitoring sensors 9 for monitoring.

[0035] like Figure 2 and 3 The heated surface tube 4 includes an inner tube 401 and an outer tube 402. The outer tube 402 is sleeved on the outside of the inner tube 401. The arrangement of the inner tube 401 and the outer tube 402 facilitates the opening of the installation groove 6.

[0036] like Figure 2 , 3 As shown in Figures 4 and 5, the monitor housing 5 includes a reflective layer 501. A molybdenum foil thermal radiation shielding layer 502 is fixedly connected to the inner wall of the reflective layer 501. An aerogel layer 503 is fixedly connected to the inner wall of the molybdenum foil thermal radiation shielding layer 502. By controlling the roughness and optical interference effect through the coating on the surface of the reflective layer 501, its own thermal radiation emissivity is reduced, thus suppressing the leakage of internal heat. The infrared absorption of molybdenum reduces the thermal radiation penetration rate by selectively reflecting the radiation in this band. The silica aerogel has a low thermal conductivity, achieving zero convection insulation and improving the monitoring accuracy of the temperature influence monitoring sensor 9 inside the boiler body 1.

[0037] Multiple expansion joints are made of high-expansion stainless steel 704, which provides better connectivity under heat by utilizing the thermal expansion and contraction properties of high-expansion stainless steel.

[0038] The multiple flexible thermal pads 8 are made of graphene rubber. By combining graphene nanosheets with a rubber matrix, the graphene rubber not only improves the efficiency of heat conduction, but also has a flexible design that makes it easier to fit the inner tube 401.

[0039] Working principle: In use, multiple rubber layers 706 at the bottom of multiple monitor housings 5 ​​and multiple bases 705 are inserted into cooling dry ice. The bases 705 shrink upon cooling and are then inserted into the mounting grooves 6, causing multiple expansion seats 704 to be inserted into multiple limiting grooves 701. After the multiple expansion seats 704 return to room temperature, they restore their dimensions and the monitor housings 5 ​​are installed. During use, the monitors expand due to heat, compressing the rubber layers 706. The thermal expansion characteristics are used to increase the connection and reduce the impact of heat on the high-temperature deformation resistance of the monitor housings 5.

[0040] Furthermore, by controlling the roughness and optical interference effect through the surface coating of the reflective layer 501, the thermal radiation emissivity of the layer itself is reduced, thus suppressing the leakage of internal heat. The infrared absorption of molybdenum reduces the thermal radiation penetration rate by selectively reflecting radiation in this band. The low thermal conductivity of silica aerogel achieves zero convection insulation, thereby improving the monitoring accuracy of the temperature influence monitoring sensor 9 inside the boiler body 1.

[0041] The equipment includes a control panel, which enables the equipment to be started and controlled through a human-machine interface and an electrical control system. Input signal processing converts the operator's instructions into electrical signals, and output signal transmission transmits the control signals to each actuator to realize equipment control. The monitoring sensor 9 utilizes the characteristic that the resistance of metal or semiconductor changes with temperature to calculate the temperature by measuring the resistance value. This is a commonly used technical solution in existing temperature monitoring technology and will not be elaborated on here.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A boiler heating surface tube furnace inner wall temperature over-temperature monitoring device, comprising a boiler body (1), characterized in that: The boiler body (1) is fixedly connected to a boiler body cover (2) at one end. A heating structure (3) is fixedly connected to the lower center of the side wall of the boiler body cover (2) away from the boiler body (1). The output end of the heating structure (3) passes through the side wall of the boiler body cover (2) and leads to the interior of the boiler body (1). A heating surface tube (4) is fixedly connected to the end. Multiple mounting slots (6) are provided on the outer wall of the heating surface tube (4). A monitor housing (5) is provided inside each of the multiple mounting slots (6). An installation structure (7) is provided on the lower outer wall of each of the multiple monitor housings (5). Taking one of the installation structures (7) as an example, the installation structure (7) includes two limiting grooves (701). The two limiting grooves (701) are arranged vertically on the lower part of the inner sidewall of the installation groove (6). Storage grooves (702) are provided on the outer sidewall of the monitor housing (5) located inside the two limiting grooves (701). Grooves (703) are provided on the upper and lower inner sidewalls of the two storage grooves (702). Bases (705) are provided inside the two grooves (703). Expansion seats (704) are provided on the outer sidewalls of the two bases (705). Two rubber layers (706) are sleeved on the outer side of the two expansion seats (704) and the outer side of the two bases (705).

2. The boiler heating surface tube furnace inner wall temperature over-temperature monitoring device according to claim 1, characterized in that: Each of the multiple monitor housings (5) is equipped with a monitoring sensor (9), and each of the multiple monitoring sensors (9) is equipped with a flexible heat-conducting pad (8) at the end of the multiple monitor housings (5) near the heated surface tube (4).

3. The boiler heating surface tube furnace inner wall temperature over-temperature monitoring device according to claim 1, characterized in that: The heated surface tube (4) includes an inner tube (401) and an outer tube (402), with the outer tube (402) sleeved on the outside of the inner tube (401).

4. The boiler heating surface tube furnace inner wall temperature over-temperature monitoring device according to claim 1, characterized in that: The monitor housing (5) includes a reflective layer (501), a molybdenum foil thermal radiation shielding layer (502) is fixedly connected to the inner wall of the reflective layer (501), and an aerogel layer (503) is fixedly connected to the inner wall of the molybdenum foil thermal radiation shielding layer (502).

5. The boiler heating surface tube furnace inner wall temperature over-temperature monitoring device according to claim 1, characterized in that: The expansion seats (704) are all made of high expansion stainless steel.

6. The boiler heating surface tube furnace inner wall temperature over-temperature monitoring device according to claim 2, characterized in that: The material of multiple flexible thermal pads (8) is graphene rubber.

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