CN212244642U

CN212244642U - Coal bunker weighing box structure for metering and transforming raw coal bunker of power plant

Info

Publication number: CN212244642U
Application number: CN202020060764.0U
Authority: CN
Inventors: 阮光; 周洪元; 管海民; 杨凯; 沈博宇
Original assignee: Shanghai Lanjian Weighing Technology Co ltd
Current assignee: Shanghai Lanjian Weighing Technology Co ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-12-29
Anticipated expiration: 2030-01-10

Abstract

The utility model discloses a coal bunker weighing box structure that former coal bunker of power plant measures and reforms transform. 4 box constitutional units equipartition are arranged on the cylinder and the circular cone composition surface of coal bunker coal scuttle, and in every box constitutional unit, coal bunker and supporting platform are connected respectively to square box shell top surface and bottom surface, and the both sides of top surface are fixed welding respectively and have barrel and the spacing barrel in coal bunker in the atress, and the both sides of top surface are fixed welding respectively and have barrel and the spacing cone in coal bunker under the atress under barrel and the atress under in the square box shell, install weighing sensor under the atress between the barrel and the atress under the barrel. The utility model discloses measure the capacity and be the raw coal bunker total mass more than 400 tons, measured error is not more than 1 thousandth, simple structure, and it is convenient to make, low in manufacturing cost.

Description

Coal bunker weighing box structure for metering and transforming raw coal bunker of power plant

Technical Field

The utility model relates to a coal bunker weighing device of the fire coal measurement weighing technique of thermal power enterprise especially relates to the coal bunker weighing box structure that former coal bunker of power plant measurement was reformed transform of raw coal bunker weighing more than monomer 400 tons.

Background

The sub-furnace coal metering technology is a key link for the production of many modern enterprises using coal for power generation, so that the accuracy of a sub-furnace coal metering system and the reliability of the system are important indexes for measuring the economic benefits of the enterprises.

The measurement of coal as fired is carried out according to a method for calculating power generation and supply coal consumption according to positive balance of coal as fired in a thermal power plant, which is issued 11 months 1993 by Ministry of electric power industry, and the following two schemes are proposed for the measurement of coal as fired:

1. the data are directly measured by a so-called measuring device attached to the coal feeder. The metering of coal as fired in most coal-fired power plants is usually carried out by data output by a weighing type coal feeder, and the 'continuous accumulation automatic weighing machine' must be regularly subjected to physical verification according to the requirements of JJJG 195-2002 national metrological verification regulations according to the international R50 recommendation of the International legal metering Organization (OIML) and the national standard requirements of GB/T7721-2007. The existing weighing coal feeder does not have the function of 'material object checking', so the weighing coal feeder does not belong to the national approved metering equipment.

2. The measurement data is obtained by the indirect measurement data of the electronic belt conveyor scale in the furnace and the coal plough of each raw coal bin. The measurement data of the proposal is the sum of the accumulated amount of the electronic belt weigher entering the furnace and the coal amount on the belt conveyor between the electronic belt weigher and the coal plough of the added raw coal bunker minus the difference of the residual coal amount between the belt weigher before the coal plough is lifted and the coal plough of the added raw coal bunker. The flow on the furnace entering belt conveyor cannot be stable and unchangeable, so that accurate data of the coal amount on the belt conveyor between the furnace entering electronic belt conveyor scale and the added raw coal bin coal plough cannot be obtained, and the coal plough inevitably has coal leakage in the coal ploughing process, so that the factors inevitably cause a large error in sub-furnace coal metering.

The two conventional coal as fired metering methods can not obtain accurate metering results, so that the problems are urgently solved, a metering tracing device for carrying out large-tonnage raw coal bunker by utilizing standard sensor value transmission is additionally arranged on the existing installed raw coal bunker, and the coal as fired can be accurately metered under the dynamic working condition of continuously feeding coal to the boiler while feeding the bunker.

SUMMERY OF THE UTILITY MODEL

To the not enough of prior art, in order to solve the problem that exists among the background art, the utility model aims at providing a coal bunker weighing box structure that former coal bunker of power plant measurement was reformed transform, accurately carry out branch stove coal measurement under the dynamic operating mode of giving the boiler coal feed in succession when the coal charge adds the storehouse.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model comprises four box structure units which are uniformly distributed on the joint surface of the coal bunker cylinder and the cone, and each box structure unit comprises a stressed upper cylinder, a stressed lower cylinder, a coal bunker spacing lower cone, a coal bunker spacing upper cylinder and a square box shell; the top surface of a square box body shell is connected to the joint surfaces of a coal bunker cylinder and a cone, the bottom surface of the square box body shell is positioned on a supporting platform, two sides of the inner top surface of the square box body shell are respectively and fixedly welded with a stressed upper barrel and a coal bunker limiting upper barrel, the inner bottom surface of the square box body shell right below the stressed upper barrel is fixedly welded with a stressed lower barrel, a weighing sensor is arranged between the stressed upper barrel and the stressed lower barrel, the inner bottom surface of the square box body shell right below the coal bunker limiting upper barrel is fixedly welded with a coal bunker limiting lower cone, and the coal bunker limiting upper barrel and the coal bunker limiting lower cone are spaced and do not contact; the stressed upper barrel body, the stressed lower barrel body and the coal bunker limiting upper barrel body are all hollow straight cylindrical structures, and the coal bunker limiting lower cone is a hollow cylindrical structure with an upper port smaller than a lower port; before weighing and measuring, horizontal through grooves are formed in the side walls of the two sides of the square box body shell.

A plurality of box structure units are uniformly distributed between the upper edges of the joint surfaces of the coal bunker cylinder and the cone and the supporting platform along the circumferential direction, and the center connecting line of the stressed upper cylinder body and the coal bunker spacing upper cylinder body in the box structure units is vertical to the radial direction of the coal bunker.

The stressed upper barrel and the stressed lower barrel are coaxially arranged, the coal bunker limiting lower cone and the coal bunker limiting upper barrel are coaxially arranged, and the included angle alpha between the connecting line from the central axis of the stressed upper barrel to the rotating center of the bottom surface of the coal bunker and the connecting line from the coal bunker limiting upper barrel to the rotating center of the bottom surface of the coal bunker is smaller than 2.3 degrees.

The radial dimension of the stressed upper cylinder body is smaller than that of the stressed lower cylinder body.

The radial dimension of the upper port of the coal bunker limiting lower cone is smaller than that of the coal bunker limiting upper cylinder, and the radial dimension of the lower port of the coal bunker limiting lower cone is larger than that of the coal bunker limiting upper cylinder.

The stressed upper cylinder body, the stressed lower cylinder body, the coal bunker limiting lower cone, the coal bunker limiting upper cylinder body and the square box body shell are all made of Q345 steel materials.

The utility model discloses the structure is applicable to and is gone into stove coal upper portion for the coal bunker of cylinder lower part for the circular cone, and the capacity can be measured for the raw coal bunker total mass more than 400 tons through the use of the equipartition combination cooperation weighing sensor of the same box structure of a plurality of, and measuring error is not more than 1 thousandth.

The utility model discloses the coal bunker of former coal bunker measurement transformation box of weighing simple structure makes conveniently, low in manufacturing cost.

Drawings

FIG. 1 is a schematic view of a structural unit of a case;

fig. 2 is a schematic diagram of the arrangement of a plurality of box structural units on a coal bunker installation plane.

Fig. 3 is a top view of fig. 2.

In the figure: the device comprises a stressed upper barrel body 1, a stressed lower barrel body 2, a coal bunker limiting lower cone 3, a coal bunker limiting upper barrel body 4, a square box body shell 5, a weighing sensor 6, a supporting platform 7, a coal bunker 8 and a box body structural unit 9.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

As shown in fig. 1, the concrete implementation includes 4 box structure units 9, the 4 box structure units 9 are uniformly distributed on the joint surface of the coal bunker 8 cylinder and the cone, each box structure unit 9 includes a stressed upper cylinder 1, a stressed lower cylinder 2, a coal bunker limit lower cone 3, a coal bunker limit upper cylinder 4 and a square box shell 5; the square box body shell 5 is a square annular stretching piece, the top surface of the square box body shell 5 is connected to the joint surface of a coal bunker 8 cylinder and a cone, the bottom surface of the square box body shell 5 is positioned on a supporting platform 7, two sides of the inner top surface of the square box body shell 5 are respectively and fixedly welded with a stressed upper cylinder body 1 and a coal bunker limiting upper cylinder body 4, the inner bottom surface of the square box body shell 5 right below the stressed upper cylinder body 1 is fixedly welded with a stressed lower cylinder body 2, a weighing sensor 6 is arranged between the stressed upper cylinder body 1 and the stressed lower cylinder body 2, the inner bottom surface of the square box body shell 5 right below the coal bunker limiting upper cylinder body 4 is fixedly welded with a coal bunker limiting lower cone 3, and the coal bunker limiting upper cylinder body 4 and the; the stressed upper barrel body 1, the stressed lower barrel body 2 and the coal bunker limiting upper barrel body 4 are all hollow straight cylindrical structures, and the coal bunker limiting lower cone 3 is a hollow cylindrical structure with an upper port smaller than a lower port; before weighing and measuring, horizontal through grooves with certain width are formed in the side walls of the two sides of the square box body shell 5.

As shown in fig. 2 and 3, a plurality of box structure units are uniformly distributed between the upper edges of the cylindrical and conical joint surfaces of the coal bunker 8 and the supporting platform 7 along the circumferential direction, and the central connecting line of the stressed upper cylinder 1 and the coal bunker spacing upper cylinder 4 in the box structure units is vertical to the radial direction of the coal bunker 8.

The stressed upper barrel body 1 and the stressed lower barrel body 2 are coaxially arranged, the coal bunker limiting lower cone 3 and the coal bunker limiting upper barrel body 4 are coaxially arranged, and the included angle alpha between a connecting line from the center axis of the stressed upper barrel body 1 to the bottom surface rotation center of the coal bunker 8 and a connecting line from the coal bunker limiting upper barrel body 4 to the bottom surface rotation center of the coal bunker 8 is smaller than 2.3 degrees.

The radial dimension of the cylinder 1 under stress is smaller than that of the cylinder 2 under stress.

The radial dimension of the upper port of the lower coal bunker limiting cone 3 is smaller than that of the upper coal bunker limiting cylinder 4, and the radial dimension of the lower coal bunker limiting cone 3 is larger than that of the upper coal bunker limiting cylinder 4.

The stressed upper barrel body 1, the stressed lower barrel body 2, the coal bunker limiting lower cone 3, the coal bunker limiting upper barrel body 4 and the square box body shell 5 are all made of Q345 steel materials.

The three cylinders and the cone are welded on the square box shell in a welded connection, and the upper surface and the lower surface of the square box shell are subjected to washing and grinding after being welded.

The weight of the coal bunker is measured by the load bearing of the weighing sensor 6 between the stressed upper barrel 1 and the stressed lower barrel 2, and the safety limit of the raw coal bunker is realized by the matching of the coal bunker limit lower cone 3 and the coal bunker limit upper barrel 4.

In the concrete implementation, the square box shell 5 is spliced by four panels in a welding way, the thickness of each panel is larger than 15mm, after the cylinder body 1 on the stress and the cylinder body 2 under the stress are welded, the end faces of the cylinder body 1 on the stress and the cylinder body 2 under the stress are processed by washing and cutting, the parallelism of two planes is ensured to be less than 0.01, and the perpendicularity error between the supporting surface and the side surface is ensured to be less than 0.01.

The utility model discloses a process of weighing as follows:

place 4 box constitutional units on supporting platform 7, weld on supporting platform 7 square box shell 5 bottom surface, a plurality of box constitutional units are located coal bunker 8 cylinder and cone composition surface, and along following 8 cylinder of coal bunker and cone composition surface top edge circumference interval equipartitions, barrel 1 and the spacing 4 center connection lines of barrel in the atress in every box constitutional unit perpendicular to 8 radial directions in coal bunker 8 on the coal bunker.

An upper weighing sensor 6 is placed between an upper stressed barrel 1 and a lower stressed barrel 2, a coal bunker 8 falls down and is contacted by a plurality of box structure units, the top surface of a square box shell 5 is welded and connected with the bottom surface of a supporting platform 7, then gas cutting is adopted on the side walls of two sides of the square box shell 5, a horizontal through groove with the width of 1cm-2cm is formed, so that the square box shell 5 is separated into an upper half part and a lower half part, the upper half part is provided with an upper stressed barrel 1 and a coal bunker limiting upper barrel 4, and the lower half part is provided with a lower stressed barrel 2 and a coal bunker limiting lower cone 3;

the coal bunker 8 falls down and is supported by the upper half part, and is pressed down on the weighing sensor 6 above the stressed lower barrel 2 by the upper barrel 1, and the weight of the coal bunker 8 is jointly detected by the weighing sensors 6 of the 4 box body structural units. In the detection process, the coal bunker limit upper cylinder body 4 is not contacted with the coal bunker limit lower cone 3 and only safety limit is carried out.

Claims

1. The utility model provides a coal bunker weighing box structure that former coal bunker of power plant measures and reforms transform which characterized in that: the coal bunker device comprises four box body structural units, wherein the four box body structural units are uniformly distributed on the joint surfaces of a coal bunker (8) cylinder and a cone, and each box body structural unit comprises a stressed upper cylinder (1), a stressed lower cylinder (2), a coal bunker limiting lower cone (3), a coal bunker limiting upper cylinder (4) and a square box body shell (5); the top surface of a square box body shell (5) is connected to the joint surface of a cylinder and a cone of a coal bunker (8), the bottom surface of the square box body shell (5) is positioned on a supporting platform (7), two sides of the inner top surface of the square box body shell (5) are respectively and fixedly welded with a stressed upper cylinder body (1) and a coal bunker limiting upper cylinder body (4), the inner bottom surface of the square box body shell (5) right below the stressed upper cylinder body (1) is fixedly welded with a stressed lower cylinder body (2), a weighing sensor (6) is arranged between the stressed upper cylinder body (1) and the stressed lower cylinder body (2), the inner bottom surface of the square box body shell (5) right below the coal bunker limiting upper cylinder body (4) is fixedly welded with a coal bunker limiting lower cone (3), and the coal bunker limiting upper cylinder body (4) and the coal bunker limiting lower cone; the stressed upper barrel (1), the stressed lower barrel (2) and the coal bunker limiting upper barrel (4) are all hollow straight cylindrical structures, and the coal bunker limiting lower cone (3) is a hollow cylindrical structure with an upper port smaller than a lower port; before weighing and measuring, horizontal through grooves are formed in the side walls of the two sides of the square box body shell (5).

2. The coal bunker weighing box structure for metering and reconstructing the raw coal bunker of the power plant as claimed in claim 1, wherein: a plurality of box structure units are uniformly distributed between the upper edges of the joint surfaces of the cylinder and the cone of the coal bunker (8) and the supporting platform (7) along the circumferential direction, and the center connecting line of the stressed upper barrel (1) and the coal bunker limiting upper barrel (4) in the box structure units is vertical to the radial direction of the coal bunker (8).

3. The coal bunker weighing box structure for metering and reconstructing the raw coal bunker of the power plant as claimed in claim 1, wherein: the stressed upper barrel (1) and the stressed lower barrel (2) are coaxially arranged, the coal bunker limiting lower cone (3) and the coal bunker limiting upper barrel (4) are coaxially arranged, and the included angle alpha between the connecting line from the central axis of the stressed upper barrel (1) to the rotating center of the bottom surface of the coal bunker (8) and the connecting line from the coal bunker limiting upper barrel (4) to the rotating center of the bottom surface of the coal bunker (8) is smaller than 2.3 degrees.

4. The coal bunker weighing box structure for metering and reconstructing the raw coal bunker of the power plant as claimed in claim 1, wherein: the radial dimension of the stressed upper cylinder (1) is smaller than that of the stressed lower cylinder (2).

5. The coal bunker weighing box structure for metering and reconstructing the raw coal bunker of the power plant as claimed in claim 1, wherein: the radial size of the upper port of the coal bunker limiting lower cone (3) is smaller than that of the coal bunker limiting upper cylinder (4), and the radial size of the lower port of the coal bunker limiting lower cone (3) is larger than that of the coal bunker limiting upper cylinder (4).

6. The coal bunker weighing box structure for metering and reconstructing the raw coal bunker of the power plant as claimed in claim 1, wherein: the stressed upper cylinder body (1), the stressed lower cylinder body (2), the coal bunker limiting lower cone (3), the coal bunker limiting upper cylinder body (4) and the square box body shell (5) are all made of Q345 steel materials.