CN220583621U - Thermocouple fixing device - Google Patents

Abstract

The embodiment of the application provides a power plant boiler thermocouple fixing device, fixing device includes: the heat-insulating device comprises a shell, a heat-collecting block and a fastener, wherein the shell is hollow, and the hollow part is filled with a heat-insulating material; the heat collecting block is provided with a non-through channel for inserting a heating couple; the fastener comprises a pipe hoop, a nut, a gasket, a backing plate and a big-end screw. The shell and the heat collecting block are fixed on the pipe wall to be measured through fasteners. The thermocouple fixing device can solve the problem of thermocouple heat preservation, can be detached when being overhauled conveniently, and parts can be reused, so that the cost is saved.

Description

Thermocouple fixing device

Technical Field

The utility model belongs to the technical field of thermal power generation, and particularly relates to a detachable thermocouple fixing device with heat preservation.

Background

In recent years, flexible peak regulation is a normal operation state of a coal-fired power generation unit, and the temperature change range of the wall of a high-temperature heating surface of a boiler in the peak regulation process is large, so that the heat deviation of the high-temperature heating surface of the boiler is large. If the boiler has serious thermal deviation in actual operation, the safety of the heating surface is seriously threatened. In recent years, the wall temperature deviation of the wall of the heating surface causes over-temperature tube explosion; the accidents that the oxide skin generated in the tube falls off to block the tube explosion occur at high temperature, and the safety and the economical efficiency of the operation of the boiler are directly affected, so that the wall temperature monitoring of the high-temperature heating surface of the power station boiler is particularly important.

At present, the power station boiler adopts an armored thermocouple to measure the wall temperature of the heated surface pipe, and the conventional method comprises the following steps: and welding a heat collecting block on the pipe wall of the heating surface, and installing and fixing a thermocouple in the heat collecting block so as to measure the pipe wall temperature of the high-temperature heating surface. In general, the heat collecting block does not perform independent heat preservation, and the wall temperature of the high-temperature heating surface measured in the state is often lower than the real wall temperature, so that the wall temperature of the boiler exceeds the heat-resistant upper limit of a pipe wall material in the operation process, but the measured temperature value of the thermocouple is lower and cannot truly represent the wall temperature data, so that a boiler operator cannot grasp the real wall temperature measured data, and combustion adjustment cannot be performed in time, and a pipe explosion accident of the high-temperature heating surface is caused.

Even if the subsequent industry is aware of the need to keep thermocouples warm, it is a conventional approach: and wrapping the heat collecting block with heat insulating cotton. Under the condition, if the thermocouple is in fault inspection, the thermocouple can be detached by pulling the heat-insulating cotton side, and heat insulation is restored after the inspection is finished. The conventional method adopts a welding method as a connection mode of the heat collecting block and the pipe to be measured, and the heat collecting block is welded fully in order to ensure that the heat collecting block and the pipe to be measured are large in contact surface and firm in installation, so that the heat collecting block is installed in a labor-consuming and time-consuming mode. Especially when the power consumption is high, the shutdown time of the boiler unit is short, and the requirement on the overhaul working time is higher.

Therefore, in order to solve the above problems, it is necessary to provide a thermocouple fixing device with heat preservation and convenient disassembly.

Disclosure of Invention

The embodiment of the application provides a thermocouple fixing device which can be suitable for monitoring the wall temperature of a steam outlet of a high-temperature heating surface (a superheater and a reheater) of a power station boiler.

The embodiment of the application provides a thermocouple fixing device, comprises casing, heat collection piece, fastener, wherein is equipped with thermocouple passageway and can be used to the internal thread hole that the screw of fastening thermocouple passed on the heat collection piece, and the heat collection piece is fan-shaped from last down overlook the face, and its fan-shaped radian is unanimous with waiting the pipe wall radian, and the casing is fixed on the pipe wall that awaits measuring through the fastener to the heat collection piece.

The fastener consists of a gasket, a backing plate, a screw, a pipe hoop and a nut, and the fastener can be made of 304 stainless steel.

The shell is hollow, the overlooking of the shell is saddle-shaped, the concave curve of the shell is consistent with the radian of the heat collecting block, a circular channel hole is arranged on the center point of the concave curve and the corresponding plane of the concave curve, a circular channel hole is arranged between the concave surface of the shell and the corresponding plane of the concave curve, screws in the fastening piece can pass through the circular channel hole, and heat preservation cotton is filled in the shell.

In a preferred embodiment, the screw of the fastener is a large-head screw, the large head has no external thread, and the small head has external thread and is matched with the internal thread hole of the heat collecting block.

In a preferred embodiment, the fastener comprises at least 2 pipe hoops, and a nut gasket and a backing plate matched with the pipe hoops.

In a preferred embodiment, the pipe clamp is provided with a cylinder with external threads at two ends and is matched with a nut in a fastener.

In a preferred embodiment, the gaskets in the fastener are saddle-shaped, the concave curve radian of the saddle-shaped gaskets is consistent with the wall of the pipe to be measured, and the plane of the saddle-shaped gaskets is provided with regular bulges. The pad overlook for saddle shape, concave surface radian is unanimous with the pipe wall radian that awaits measuring, and plane one side has regular bump.

In a preferred embodiment, one side of the pad is provided with regular bumps.

In a preferred embodiment, the heat collecting block is made of 304 stainless steel.

In a preferred embodiment, the heat collecting block is made of a material consistent with the material of the pipe wall to be measured.

In a preferred embodiment, the fastener comprises shims, screws, ferrules, and nuts all of 304 stainless steel.

In a preferred embodiment, the housing is hollow, and the hollow is filled with a thermal insulation material.

In a preferred embodiment, the insulating material of the shell is glass wool, and the shell material is 304 stainless steel.

In this application embodiment, the thermocouple passes through the heat collection piece passageway, and the heat collection piece outside is surrounded by the casing that is equipped with thermal insulation cotton, fixes casing and the heat collection piece that is equipped with the thermocouple on the pipe wall that awaits measuring through the fastener, and above-mentioned device-thermocouple fixing device can satisfy comparatively accurate measurement boiler high temperature heating surface pipe wall temperature, can make things convenient for the boiler to overhaul the time to the thermocouple to all parts can be used repeatedly again, labour saving and material saving.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a top view of a thermocouple assembly in accordance with an embodiment of the present disclosure;

FIG. 2 is a side view of the thermocouple assembly in accordance with the embodiment of the present disclosure from the side of the housing;

FIG. 3 is a front view of a thermocouple assembly in accordance with an embodiment of the present disclosure;

FIG. 4 is a diagram of a large head screw component of a thermocouple assembly according to the embodiment of the present disclosure;

description of the drawings: 1. the heat-insulating pipe comprises a shell, a heat-collecting block, a channel for inserting a heat-supplying couple, a pipe wall to be detected, a hole for passing a big-end screw, a small-end screw, a heat-insulating material space, a gasket, a 9, a backing plate, a 10 pipe hoop, a 11 and a nut, wherein the heat-insulating pipe is arranged on the shell, the heat-collecting block is arranged on the heat-supplying couple, and the pipe wall to be detected is arranged on the heat-insulating pipe.

Detailed Description

In order to better understand the technical solutions in the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Please refer to fig. 1, 2 and 3. Embodiments of the present specification provide a thermocouple fixing device including: the heat collector comprises a shell 1, a heat collector block 2 and a fastener combination, wherein the fastener combination comprises a pipe hoop 10, a base plate 9, a gasket 8, a nut 11 and a big-and-small-head screw 6;

the shell 1 is hollow, the top view of the shell 1 is saddle-shaped, the concave part is a circular curved surface, and a round hole is formed along the X-axis direction from the concave surface of the shell 1; the top view of the heat collecting block 2 is fan-shaped, a channel 3 which is not penetrated by the thermocouple is arranged along the Y-axis direction from top to bottom, the radian of the heat collecting block 2 is consistent with that of the pipe wall 4 to be tested, so that the heat collecting block 2 and the pipe wall 4 to be tested can be attached, a hole with internal threads is arranged on the heat collecting block 2 along the X-axis direction, the hole is matched with the external threads of the small end of the big-end screw 6, and the hole is penetrated by the channel 3 which is penetrated by the thermocouple; after the shell 1 and the heat collecting block 2 are fixed on the pipe wall 4 to be measured through the fastener, the thermocouple is inserted into the channel 3 into which the thermocouple is inserted, and the big-and-small-head screw 6 fixes the thermocouple through the circular channel hole 5 on the shell and the internal thread hole along the X-axis direction on the heat collecting block 2.

In this embodiment, two ends of a pipe hoop 10 in the fastener are cylinders with external threads, and are matched with a nut 11 in the fastener, the pipe hoop 10 surrounds and fixes the shell 1 and the heat collecting block 2 on the pipe wall 4 to be measured, wherein the gasket 8 and the backing plate 9 are anti-skid and convenient for adjusting the installation position of the whole thermocouple fixing device.

In the present embodiment, the constituent elements of the thermocouple fixing device are all stainless steel except for the heat insulating material in the housing 1, in which the heat collecting block is 304 stainless steel or higher heat resistant grade stainless steel.

Through the embodiment, the purposes of heat preservation, fixed installation, overhaul and disassembly of the thermocouple and repeated use of parts can be achieved through the thermocouple fixing device consisting of the shell 1, the heat collecting block 2 and the fasteners.

For the case and the heat collecting block to be fixed more firmly, the pipe hoop 10 is at least 2, and comprises a gasket 8, a backing plate 10 and a nut 11 matched with the pipe hoop.

For the fixed firm of casing and heat collecting block, gasket 8 top view is the saddle, and the concave surface of saddle is unanimous with the pipe wall 4 radian that awaits measuring, for increasing frictional force between gasket and the backing plate, has regular arch on the plane of saddle, and at least one side of backing plate 9 has regular arch.

For better heat preservation, the hollow part in the shell 7 is filled with heat preservation cotton.

The foregoing description is for purposes of illustration and is not intended to be limiting. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego such subject matter, nor should the applicant be deemed to have such subject matter not considered to be part of the subject matter of the disclosed application.

Claims (10)

1. A thermocouple fixing device consists of a shell, a heat collecting block and a fastening piece, and is characterized in that the heat collecting block is provided with a thermocouple channel from top to bottom, an internal threaded hole is formed in the left to right, the heat collecting block is fan-shaped in top view from top to bottom, the fan-shaped radian of the heat collecting block is consistent with the radian of a wall to be measured, and the heat collecting block and the shell are fixed on the wall of the tube through the fastening piece.

2. The thermocouple assembly as set forth in claim 1 wherein said fastener comprises a ferrule, a washer, a backing plate, a nut and a screw.

3. The thermocouple fixing device according to claim 1, wherein the housing is hollow, the top surface of the housing is saddle-shaped, the concave curve of the housing is consistent with the radian of the heat collecting block, and a circular channel hole is arranged on the center point of the concave curve and the corresponding plane.

4. The thermocouple assembly as recited in claim 1 wherein said heat collection block is 304 stainless steel.

5. The thermocouple assembly as defined in claim 2 wherein said screw is a large and small head screw, the large head having no external threads and the small head having external threads and mating with an internally threaded bore in the heat collection block.

6. The thermocouple assembly as defined in claim 2 wherein said spacer has a saddle-like shape in plan view, a concave curvature corresponding to the curvature of the wall of the pipe to be measured, and a regular bump on one side of the plane.

7. The thermocouple assembly as recited in claim 2 wherein said ferrules are externally threaded posts at each end, and wherein said fasteners include at least 2 ferrules and a number of shims, spacers and nuts associated with the number of ferrules.

8. The thermocouple assembly as defined in claim 2 wherein one side of said backing plate has regular bumps.

9. A thermocouple assembly as set forth in claim 3 wherein said hollow portion of said housing is filled with a thermal insulation material.

10. The thermocouple assembly as in claim 9 wherein said insulating material is glass wool and said housing material is 304 stainless steel.