Installation guide pipe structure for pulverized coal boiler flue gas thermocouple

Abstract

The invention provides an installation guide pipe structure for a pulverized coal boiler flue gas thermocouple, and belongs to the technical field of pulverized coal boiler flue gas temperature measurement. The problem of large deviation between installation and design requirements of the thermocouple in the prior art is solved. The device comprises a mounting guide pipe and a fixing device, the mounting guide pipe is perpendicularly and fixedly connected to an opening in the outer wall of the flue, the fixing device comprises a plurality of fixing rib plates, the fixing rib plates are evenly arranged at one end of the mounting guide pipe in the circumferential direction, one side of each fixing rib plate is connected with the mounting guide pipe, and the other side of each fixing rib plate is connected with the flue. And the bottoms of the fixed rib plates are connected with the outer wall of the flue. The device is mainly used for installing the pulverized coal boiler flue gas thermocouple.

Description

Technical Field

[0001] The present invention belongs to the technical field of flue gas temperature measurement for pulverized coal boilers, and particularly relates to an installation conduit structure for a thermocouple of a pulverized coal boiler flue gas. Background Art

[0002] In the measurement of the flue gas temperature of a boiler, a thermocouple is an important instrument for monitoring the heat characteristic parameters of the flue gas formed after fuel combustion in various heating surface areas. By measuring the temperature, the heating conditions and ash fouling conditions of each heating surface can be judged to facilitate operation guidance. In the prior art, the temperature measurement of the boiler flue gas is realized by inserting and installing the thermocouple at the opening on the outer wall of the flue. The installation angle and fixing method of the thermocouple have a great influence on measurement and maintenance. Due to the influence of the installation quality and installation habits of installers, the installation of the existing thermocouple deviates greatly from the design requirements, thus affecting the insertion angle of the thermocouple and the measurement results. Summary of the Invention

[0003] In view of this, the present invention aims to provide an installation conduit structure for a thermocouple of a pulverized coal boiler flue gas to solve the problem that the installation of the thermocouple in the prior art deviates greatly from the design requirements.

[0004] To achieve the above object, the present invention adopts the following technical solutions: An installation conduit structure for a thermocouple of a pulverized coal boiler flue gas, which includes an installation conduit and a fixing device. The installation conduit is vertically and fixedly connected to the opening on the outer wall of the flue. The fixing device includes a plurality of fixing rib plates. The plurality of fixing rib plates are evenly arranged circumferentially at one end of the installation conduit. One side of the fixing rib plate is connected to the installation conduit, and the bottom of the fixing rib plate is connected to the outer wall of the flue.

[0005] Furthermore, one end of the installation conduit and the opening on the outer wall of the flue are connected by welding.

[0006] Furthermore, one side of the fixing rib plate and the outer wall of the installation conduit are connected by welding.

[0007] Furthermore, the bottom of the fixing rib plate and the outer wall of the flue are connected by welding.

[0008] Furthermore, the fixing rib plate is of a stepped structure.

[0009] Furthermore, the number of the fixing rib plates is two.

[0010] Furthermore, the material of the fixing rib plate is Q235B steel.

[0011] Furthermore, the material of the installation conduit is chromium-nickel alloy.

[0012] Furthermore, the thickness of the fixed rib plate is 10 mm.

[0013] Furthermore, the length of the installation conduit is 300 mm.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides an installation conduit structure for a thermocouple in the flue gas of a pulverized coal boiler. By setting an installation conduit at the opening on the outer wall of the flue, and using fixed rib plates to ensure the perpendicularity of the installation conduit, and playing a role in fixing the thermocouple installation conduit and bearing the weight of the thermocouple, so as to ensure the perpendicular insertion of the thermocouple and reduce the risk of on-site installation errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 is the front view schematic diagram of an installation conduit structure for a thermocouple in the flue gas of a pulverized coal boiler according to the present invention;

[0017] Figure 2 is the side view schematic diagram of an installation conduit structure for a thermocouple in the flue gas of a pulverized coal boiler according to the present invention.

[0018] 1 - Installation conduit, 2 - Fixed rib plate, 3 - Outer wall of the flue. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention may be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0020] See Figure 1-2 Describing this embodiment, an installation conduit structure for a thermocouple in the flue gas of a pulverized coal boiler, which includes an installation conduit 1 and a fixing device. The installation conduit 1 is vertically and fixedly connected to the opening on the outer wall 3 of the flue. The installation conduit 1 plays a guiding and fixing role when the thermocouple is inserted into the opening on the outer wall 3 of the flue. The fixing device includes a plurality of fixed rib plates 2. The plurality of fixed rib plates 2 are uniformly arranged circumferentially at one end of the installation conduit 1. One side of the fixed rib plate 2 is connected to the installation conduit 1, and the bottom of the fixed rib plate 2 is connected to the outer wall 3 of the flue. By setting the installation conduit 1 at the opening on the outer wall 3 of the flue, and using the fixed rib plates 2 to ensure the perpendicularity of the installation conduit 1, and playing a role in fixing the thermocouple installation conduit 1 and bearing the weight of the thermocouple, so as to ensure the perpendicular insertion of the thermocouple and reduce the risk of on-site installation errors.

[0021] In this embodiment, one end of the installation conduit 1 is connected to the opening of the outer wall 3 of the flue by welding.

[0022] In this embodiment, one side of the fixed rib plate 2 is connected to the outer wall of the installation conduit 1 by welding.

[0023] In this embodiment, the bottom of the fixed rib plate 2 is connected to the outer wall 3 of the flue by welding.

[0024] In this embodiment, the fixed rib plate 2 is of a stepped structure, and the number of the fixed rib plates 2 is two. Through the stepped structure and double-symmetric welding design of the fixed rib plate 2, it is ensured that the verticality deviation of the installation conduit 1 is less than 0.5°, and it can bear the weight of the thermocouple. No additional reinforcing ribs are required during on-site installation, and the welding workload is reduced by 30%, significantly reducing the deviation risk caused by the operating habits of installation personnel.

[0025] In this embodiment, the material of the fixed rib plate 2 is Q235B steel, and the thickness of the fixed rib plate 2 is 10 mm. Its material and thickness can be adjusted adaptively according to actual fixing and load-bearing requirements.

[0026] In this embodiment, the material of the installation conduit 1 is chromium-nickel alloy, and the length of the installation conduit 1 is 300 mm. Its material and length can be adjusted adaptively according to the actual size requirements of the thermocouple.

[0027] In this embodiment, the installation steps of the installation conduit structure of the pulverized coal boiler flue gas thermocouple are as follows:

[0028] Step 1: Open a circular hole with a diameter consistent with the inner diameter of the installation conduit 1 at a preset position on the outer wall 3 of the flue;

[0029] Step 2: Vertically insert the installation conduit 1 into the opening. After adjusting its axis to be perpendicular to the outer wall 3 of the flue, weld and fix it to the outer wall 3 of the flue along the circumferential direction of the conduit;

[0030] Step 3: Symmetrically weld the two stepped fixed rib plates 2 between the outer wall of the installation conduit 1 and the outer wall 3 of the flue to ensure that there are no defects such as pores and slag in the welded joints;

[0031] Step 4: After welding, polish the inner wall of the installation conduit 1 to avoid burrs affecting the insertion of the thermocouple.

[0032] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and variations can be made. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention.

Claims

1. An installation conduit structure for a thermocouple of pulverized coal boiler flue gas, characterized in that: It includes an installation conduit (1) and a fixing device. The installation conduit (1) is vertically and fixedly connected to the opening of the outer wall (3) of the flue. The fixing device includes a plurality of fixing rib plates (2). The plurality of fixing rib plates (2) are evenly arranged circumferentially at one end of the installation conduit (1). One side of the fixing rib plate (2) is connected to the installation conduit (1), and the bottom of the fixing rib plate (2) is connected to the outer wall (3) of the flue.

2. The installation conduit structure for a flue gas thermocouple of a pulverized coal boiler according to claim 1, characterized in that: One end of the installation conduit (1) is connected to the opening of the outer wall (3) of the flue by welding.

3. The installation conduit structure for a flue gas thermocouple of a pulverized coal boiler according to claim 1, characterized in that: One side of the fixing rib plate (2) is connected to the outer wall of the installation conduit (1) by welding.

4. The installation conduit structure for a flue gas thermocouple of a pulverized coal boiler according to claim 1, characterized in that: The bottom of the fixing rib plate (2) is connected to the outer wall (3) of the flue by welding.

5. The installation conduit structure for a flue gas thermocouple of a pulverized coal boiler according to claim 1, wherein: The fixing rib plate (2) is of a stepped structure.

6. The installation conduit structure for the flue gas thermocouple of a pulverized coal boiler according to claim 1, wherein: The number of the fixing rib plates (2) is two.

7. The installation conduit structure for the flue gas thermocouple of a pulverized coal boiler according to claim 1, characterized in that: The material of the fixing rib plate (2) is Q235B steel.

8. The installation conduit structure for the flue gas thermocouple of a pulverized coal boiler according to claim 1, characterized in that: The material of the installation conduit (1) is chromium-nickel alloy.

9. The installation conduit structure for a flue gas thermocouple of a pulverized coal boiler according to claim 1, wherein: The thickness of the fixing rib plate (2) is 10 mm.

10. The installation conduit structure for a flue gas thermocouple of a pulverized coal boiler according to claim 1, characterized in that: The length of the installation conduit (1) is 300 mm.

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