CN210922897U

CN210922897U - Positioning support for testing temperature field of tube furnace under load condition

Info

Publication number: CN210922897U
Application number: CN201921985383.7U
Authority: CN
Inventors: 王喆; 余松林
Original assignee: Tianjin Institute Of Metrological Supervision And Testing
Current assignee: Tianjin Institute Of Metrological Supervision And Testing
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-07-03
Anticipated expiration: 2029-11-18

Abstract

The utility model belongs to the field of temperature measurement, and relates to a calibrating device for a low-cost metal thermocouple, in particular to a positioning support for a tubular furnace temperature field test under a load condition, which comprises an in-furnace positioning disk and an out-furnace positioning disk which are arranged in parallel at intervals, wherein a plurality of groups of jacks are respectively arranged in the in-furnace positioning disk and the out-furnace positioning disk, one group comprises two jacks, the two jacks in the same group are respectively arranged in the in-furnace positioning disk and the out-furnace positioning disk and correspond to each other in axial positions, and the two jacks in the same group are used for fixing the front end part and the rear end part of a standard couple; a plurality of moving rods are integrally formed in the end faces of the inner positioning plate and the outer positioning plate on the same side along the vertical direction, the front end parts of the two moving rods penetrate out of the outer positioning plate, and the outer positioning plate can reciprocate outside the moving rods along the axial direction.

Description

Positioning support for testing temperature field of tube furnace under load condition

Technical Field

The utility model belongs to the temperature measurement field relates to calibrating device to cheap metal thermocouple, especially a locating support is used in test of tubular furnace temperature field under load situation.

Background

In the field of temperature measurement, a cheap metal thermocouple has a wide measurement range, is the most popular temperature measurement sensor in China, and is a main means for contact temperature measurement of a high-temperature region. It is applied to various fields of petrochemical industry, ferrous metallurgy, machining, finished automobile, aerospace and the like in China, and is also at an important position of national quantity value transmission, and the indication accuracy of the method is directly related to the quality of industrial production and scientific research and the quantity value transmission of an important unit of temperature. Calibrating a cheap metal thermocouple requires the use of a tube furnace (thermocouple verification furnace) as an important corollary to verify, calibrate or detect the thermocouple. Therefore, it is important to calibrate the temperature field distribution for the accuracy and reliability of the indication value of each type of temperature sensor.

The uniform temperature field performance of the traditional temperature field measuring method is measured only under the condition that the tube furnace is unloaded. Such a measurement method is only suitable for production and sales units, but is not suitable for use units (or related metering technical mechanisms), and cannot solve the problem that the influence of the furnace temperature field on the measurement result due to the load condition when the tube furnace is used for detecting and calibrating the thermocouple.

In the uncertainty evaluation of the measurement results of the thermocouples of various types, the expansion uncertainty of the measurement results obtained by applying the tube furnace is generally (0.4-2.5) DEG C, and the standard uncertainty component caused by the nonuniformity of the tube furnace is the largest one of the components, and is generally (0.2-1.0) DEG C. The results measured by the traditional temperature field measuring method cannot be applied to actual use, and technicians used in the method can only take the maximum tolerance as a half-width value object of the evaluation component in the process of analyzing and evaluating the uncertainty. Such a measurement method is neither scientific nor reasonable nor close to actual use conditions. Due to the development of temperature measurement, in order to solve the uniformity of the temperature field of the furnace, the existing tube furnace manufacturers often configure corresponding temperature equalizing devices (such as cup type temperature equalizing blocks and jack type temperature equalizing blocks) for the tube furnace, so that the performance of the temperature field can be improved to a certain extent. This means that the tube furnace cannot be seen peeled off from the uniform mass with which it is arranged.

Therefore, the temperature measuring method of the corresponding tubular furnace temperature field should follow up, and the temperature field performance of the tubular furnace must be combined with the temperature equalizing block, namely, the measurement is carried out under the load state. The distribution of the temperature field of the tubular furnace is mainly focused on the axial temperature field under the load condition, a plurality of noble metal thermocouples are required to be used as measurement standards during measurement, and each standard thermocouple needs to be moved during the measurement process, so that a positioning support capable of solving the positioning and moving problems of the distribution test of the temperature field of the tubular furnace is designed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's is not enough, provides a location and removal problem for solving tubular furnace temperature field distribution test, makes the position of measuring standard in the boiler tube more accurate, and convenient load situation tubular furnace temperature field test is with the locating support.

The utility model adopts the technical proposal that:

a positioning support for testing a temperature field of a tube furnace under a load condition is characterized in that: the positioning device comprises an in-furnace positioning disc and an out-furnace positioning disc which are arranged in parallel at intervals, wherein a plurality of groups of jacks are respectively formed in the in-furnace positioning disc and the out-furnace positioning disc, one group of jacks comprises two jacks, the two jacks in the same group are respectively arranged in the in-furnace positioning disc and the out-furnace positioning disc and correspond to each other in axial positions, and the two jacks in the same group are used for fixing the front end part and the rear end part of a standard couple; a plurality of moving rods are integrally formed in the end faces of the inner positioning plate and the outer positioning plate on the same side along the vertical direction, the front end parts of the two moving rods penetrate out of the outer positioning plate, and the outer positioning plate can reciprocate outside the moving rods along the axial direction.

Further, in the plurality of moving rods, a scale is formed on an outer surface of at least one of the moving rods in an axial direction thereof.

And a circle of sealing sleeve is integrally arranged in the end face of the outer positioning plate outside the furnace and the end face of the inner positioning plate inside the furnace, and a cylindrical channel is integrally formed in the position, corresponding to the insertion hole, in the sealing sleeve along the axial direction.

The utility model has the advantages that:

the utility model discloses in, adopt interior positioning disk of stove and two segmentation structures of stove outer positioning disk complex, place the interior positioning disk of stove when using and hug closely the combination at tubular furnace inner tube and samming piece, later through the carriage release lever with the cooperation of stove outer positioning disk suit, through the axial position of the detection end of interval adjustment standard idol between adjustment stove inner positioning disk and the stove outer positioning disk.

The utility model discloses in, make the scale in the outside of an at least carriage release lever, operating personnel need not other measuring tools and can read the change volume of outside stove positioning disk and carriage release lever position when using, confirm its and the interior interval between the positioning disk of stove, make it carry out effectual fixed with standard idol and the thermocouple of waiting to examine. The sealing sleeve can cling to the position of the furnace mouth in a sleeved state of the positioning plate outside the furnace to seal the furnace mouth, so that the heat lost from the furnace mouth is reduced.

Drawings

Fig. 1 is a schematic block diagram of the present invention;

FIG. 2 is a schematic view of the structure of the position of the insertion holes made in the positioning plate inside the furnace;

FIG. 3 is a schematic view of the structure of the position of the insertion holes formed on the positioning plate outside the furnace;

FIG. 4 is a schematic diagram of the positions of the inner and outer positioning plates for manufacturing insertion holes in another embodiment.

Detailed Description

The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.

The utility model provides a location support is used in test of tubular stove temperature field under load situation, the innovation of the utility model lies in, including the interior positioning disk 1 of stove and the exterior positioning disk 4 of stove that parallel interval installed, the interior positioning disk of stove and the exterior positioning disk of stove make multiunit jack 2 respectively, one set includes two jacks, two jacks in the same set are respectively set up in the interior positioning disk of stove and the exterior positioning disk of stove its axial position corresponding, two jacks in the same set are used for fixing the front, back tip of a standard couple; a plurality of moving rods 6 are integrally formed in the end faces of the inner positioning plate and the outer positioning plate on the same side along the vertical direction, the front end parts of the two moving rods penetrate through positioning holes 5 formed in the outer positioning plate, and the outer positioning plate can reciprocate on the outer sides of the moving rods along the axial direction.

In this embodiment, the number of the insertion holes should be not less than 5, and as shown in fig. 2 and 3, the insertion holes are formed in the middle and the periphery thereof; alternatively, as shown in fig. 3, the insertion holes may be formed in the same circumferential direction from the central position.

In this embodiment, two moving rods are preferably used, the two moving rods are welded at two sides of the positioning plate in the furnace symmetrically at intervals, and a scale 7 is formed on the outer surface of one of the moving rods along the axial direction of the moving rod.

In this embodiment, in order to fix the position of the moving rod and the positioning plate outside the furnace, a bolt may be inserted into the positioning hole at the position of the outer edge of the positioning plate outside the furnace in the radial direction, and the end of the bolt extends into the inner edge of the positioning hole and is tightly pressed against the outer surface of the moving rod.

In this embodiment, a heat insulation sleeve 8 is movably sleeved on the end of each moving rod which penetrates out of the positioning plate outside the furnace.

In this embodiment, a circle of sealing sleeve 3 is integrally installed in the end face of the outer positioning plate of the furnace and the end face of the inner positioning plate of the furnace, and a cylindrical channel is integrally formed in the sealing sleeve at a position corresponding to the insertion hole along the axial direction.

The utility model discloses a working process is:

the utility model discloses during the use, before the distribution of tubular furnace temperature field under the calibration load state, should place the samming piece on the geometric centre of tubular furnace inner tube earlier, samming piece bottom is located under the tubular furnace uniform temperature field. Will the utility model discloses a positioning disk in stove places at the tube furnace inner tube, hugs closely with the samming piece. The movable positioning plate outside the furnace is placed at the furnace mouth, and the ring sealing sleeve is tightly attached to the furnace mouth. The jacks of the positioning disk inside the furnace and the jacks of the positioning disk outside the furnace are axially in one-to-one correspondence. And (4) inserting the protective tube on the measuring standard sleeve into the corresponding jack, and tightly attaching the measuring end, the protective tube and the bottom of the temperature equalizing block. And controlling the temperature of the tubular furnace to rise to a calibration temperature point, and preparing to start measurement of the temperature field distribution of the furnace temperature.

The utility model discloses in, adopt interior positioning disk of stove and two segmentation structures of stove outer positioning disk complex, place the interior positioning disk of stove when using and hug closely the combination at tubular furnace inner tube and samming piece, later through the carriage release lever with the cooperation of stove outer positioning disk suit, through the standard idol that interval between adjustment stove inner positioning disk and the stove outer positioning disk can the different sizes of adaptation.

Claims

1. A positioning support for testing a temperature field of a tube furnace under a load condition is characterized in that: the positioning device comprises an in-furnace positioning disc and an out-furnace positioning disc which are arranged in parallel at intervals, wherein a plurality of groups of jacks are respectively formed in the in-furnace positioning disc and the out-furnace positioning disc, one group of jacks comprises two jacks, the two jacks in the same group are respectively arranged in the in-furnace positioning disc and the out-furnace positioning disc and correspond to each other in axial positions, and the two jacks in the same group are used for fixing the front end part and the rear end part of a standard couple; a plurality of moving rods are integrally formed in the end faces of the inner positioning plate and the outer positioning plate on the same side along the vertical direction, the front end parts of the two moving rods penetrate out of the outer positioning plate, and the outer positioning plate can reciprocate outside the moving rods along the axial direction.

2. The positioning bracket for testing the temperature field of the tube furnace under the load condition of claim 1, wherein: in the plurality of moving rods, scales are formed on the outer side surface of at least one moving rod along the axial direction of the moving rod.

3. The positioning bracket for testing the temperature field of the tube furnace under the load condition of claim 1, wherein: a circle of sealing sleeve is integrally arranged in the end face of the outer positioning plate outside the furnace and the end face of the inner positioning plate inside the furnace, and a cylindrical channel is integrally formed in the position, corresponding to the insertion hole, in the sealing sleeve along the axial direction.