阅读说明：本技术 一种用于料位计的隔热吹扫保护系统、安装及使用方法 (Heat insulation blowing protection system for charge level indicator, installation method and use method ) 是由 董晓峰 田蒲 贾新盛 邸永杰 于 2021-07-31 设计创作，主要内容包括：本发明提供一种用于料位计的隔热吹扫保护系统,包括：料位计保护箱体,其顶部设置箱门；吹扫管路,吹扫管路通过吹扫管孔穿设在料位计保护箱体侧壁；料位计信号线缆,通过料位计电缆线穿线口连接在料位计保护箱体侧壁；料位计固定连接法兰,通过法兰孔将料位计固定安装在料位计保护箱体内；料位计抬高套管,通过料位计抬高套管连接法兰将料位计的位置抬高距离地面一定距离后将料位计的探头安装在料位计抬高套管内。还提供了相应的加工安装方法和使用方法,克服不能自动连续吹扫探头积灰和工作介质工作流程出现高温异常时不能保护仪表重大隐患问题。(The invention provides a heat insulation purging protection system for a level gauge, which comprises: the top of the charge level indicator protection box body is provided with a box door; the blowing pipeline is arranged on the side wall of the charge level indicator protection box in a penetrating mode through a blowing pipe hole; the charge level indicator signal cable is connected to the side wall of the charge level indicator protection box body through a charge level indicator cable threading opening; the material level meter is fixedly connected with a flange and is fixedly arranged in the material level meter protective box body through a flange hole; the sleeve pipe is raised to the charge level indicator, raises the position of charge level indicator apart from ground certain distance through the sleeve pipe flange is raised to the charge level indicator and installs the probe of charge level indicator in the sleeve pipe is raised to the charge level indicator. The corresponding processing and mounting method and the using method are further provided, and the problem that the serious hidden danger of the instrument cannot be protected when the dust accumulation of the probe cannot be automatically and continuously swept and the working medium working process is abnormal at high temperature is solved.)

1. A thermal-insulated protection system that sweeps for level gauge characterized in that includes:

the top of the charge level indicator protective box body (1) is provided with a box door (11);

the blowing pipeline (2) penetrates through the side wall of the charge level indicator protective box body (1) through a blowing pipe hole (3);

the level indicator signal cable (4) is connected to the side wall of the level indicator protective box body (1) through a level indicator cable threading opening (41);

the material level meter is fixedly connected with a flange (5), and the material level meter (7) is fixedly arranged in the material level meter protective box body (1) through a flange hole;

sleeve pipe (6) are raised to the charge level indicator, raise sleeve pipe flange (61) through the charge level indicator and will the position of charge level indicator (7) is raised and will after certain distance apart from ground the probe of charge level indicator (7) is installed the sleeve pipe (6) is raised to the charge level indicator.

2. An insulated purge protection system for a level gauge as claimed in claim 1, wherein: the level indicator protection box body (1) is made of rectangular stainless steel.

3. An insulated purge protection system for a level gauge as claimed in claim 1, wherein: the purging pipeline (2) is divided into two branches, namely a box purging pipeline (21) for performing box purging and a level indicator purging pipeline (22) for performing probe purging.

4. An insulated purge protection system for a level gauge as claimed in claim 3, wherein: the level gauge purging pipeline (22) is a metal hard pipe.

5. An insulated purge protection system for a level gauge as claimed in claim 3, wherein: the box sweeps pipeline (21) and sweeps the intake pipe through the charge level indicator guard box and gives vent to anger to connect (25) and the first pipe hole that sweeps of sweeping the pipeline is connected charge level indicator guard box (1) lateral wall.

6. An insulated purge protection system for a level gauge as claimed in claim 3, wherein: the material level indicator purging pipeline (22) is connected to the side wall of the material level indicator protection box body (1) through a material level indicator protection box purging exhaust hole (24) and a purging pipe hole of the second purging pipeline.

7. An insulated purge protection system for a level gauge as claimed in claim 6, wherein: and a purge gas regulating valve (23) is arranged on the level indicator purge pipeline (22) and is used for controlling the size of the gas flow.

8. An insulated purge protection system for a level gauge as claimed in claim 7, wherein: the purge gas regulating valve (23) is a pointer type regulating valve.

9. A method for manufacturing and installing the thermal insulation purge protection system for a level gauge according to any one of claims 1 to 8, comprising:

1) manufacturing a charge level indicator protection box body (1), wherein the charge level indicator protection box body (1) is made of rectangular stainless steel materials, and the upper part of the charge level indicator protection box body is provided with a box door (11) which can be opened;

2) arranging two purging pipe holes for installing purging pipelines, a level indicator signal cable threading opening (41) and a level indicator protection box purging exhaust hole (24) on the side wall of the level indicator protection box body (1);

3) a charge level indicator mounting and fixing connecting flange (5) and a charge level indicator lifting sleeve connecting flange (61) are arranged at the bottom in the charge level indicator protecting box body (1);

4) connecting a probe purging pipeline (22) of the charge level indicator to a purging air inlet pipe, and configuring and installing a pressure regulating valve for regulating purging pressure;

5) installing a box body purging pipeline (21);

6) welding the bottom of the level indicator (7) and the raw level indicator to a level indicator lifting sleeve connecting flange (61) through a level indicator lifting sleeve (6);

7) a probe of the level gauge (7) is arranged in the level gauge lifting sleeve (6).

10. Use of an insulated purge protection system for a level gauge according to any of claims 1-8, comprising:

step 1, heat insulation and purging: in the normal measurement working process of the charge level indicator (7), a box door (11) at the top of the charge level indicator protective box body (1) is closed and tightly buckled, and the probe of the charge level indicator (7) and the purge gas of the charge level indicator protective box body (1) are continuously purged by introducing compressed air;

and step 2, purging and adjusting: the blowing gas pressure of the probe of the charge level indicator (7) controls the suitable range of gas volume through a blowing gas regulating valve (23) in the charge level indicator protective box body (1), so that the probe of the charge level indicator can be continuously blown;

and step 3, checking a material level meter (7): when the on-site display value of the charge level indicator (7) is checked and maintained, a box door (11) at the top of the charge level indicator protective box body (1) is opened for checking and maintaining.

Technical Field

The invention relates to the technical field of modification of a material level gauge of a boiler slag bin of a thermal power plant, in particular to a heat-insulation blowing protection system for the material level gauge, and an installation and use method of the heat-insulation blowing protection system.

Background

What boiler slag bin level gauge of present many units adopted is that radar wave formula level gauge carries out continuous measurement to the material level in the slag bin, but general radar wave level gauge mounting means is fairly simple, only conventional horn mouth formula probe, flange and measurement display device, does not have the shell to prevent high temperature protection device and sweeps the device to the probe deposition. This has a series of problems as follows:

1. during the operation of slag charge and row's sediment in general boiler slag storehouse, can produce a large amount of cinder in the slag storehouse, and slag storehouse level gauge mounted position generally is in slag storehouse top trompil department, so the probe surface of charge level indicator can often the once deposition of adhesion, disturb the normal accurate measurement of charge level indicator, need often pull down the charge level indicator to slag storehouse top charge level gauge mounted position department and carry out manual purge to the charge level indicator probe, increased the artifical maintenance volume of equipment and the accurate reliable measurement of influence instrument.

2. Although the dry slag conveyed by the dry slag system of some units boiler is conveyed to a slag bin slag crusher through a conveying chain and falls into a slag bin after being crushed, the slag discharged from the bottom of the boiler has high temperature and sometimes has much slag bonding, and continuous slag squeezing and slag discharging operation needs to be carried out on the slag bonding at the bottom of the boiler in order to avoid the blockage of the bottom of the boiler from influencing the safe operation of the boiler system; however, in the continuous slag discharging process, as the conveyed slagging temperature is very high, the slag crusher and the pipeline part in the slag bin can not bear high-temperature firing inevitably, high-temperature crushed slag leaks outwards after being crushed, and can be stacked on a platform below the slag crusher when the leakage is large, a slag bin material level meter on the platform at the bottom of the slag crusher is buried, the slag is difficult to clean in time due to overhigh temperature, the high-temperature crushed slag directly contacts with a common material level meter shell which cannot resist high temperature for a long time, the material level meter is caused to be burnt and deformed, and a circuit part is burnt and damaged.

3. Because the installation position of the raw material level meter is on the ground of the lower platform of the slag crusher at the opening at the top of the slag bin, the position is too low, and once the slag crusher and a pipeline are leaked, the raw material level meter can be buried and burnt.

4. The material level meters of a large number of unit boiler slag bins cause the burning loss phenomenon of the material level meters of the slag bins due to the fact that slag is discharged for a long time and the material level meters are leaked outside and buried, the economic loss of the equipment caused by the burning loss phenomenon is large, and the safe and reliable operation of the important monitoring instrument of the slag discharge equipment of the boiler is greatly influenced.

Disclosure of Invention

In order to overcome the problems in the prior art, the invention aims to provide the blowing protection device which can continuously blow the surface of the probe of the slag bin level gauge, has a heat insulation protection shell for the level gauge and can raise the installation height of the level gauge, and is used for solving the three defects and the defects that the prior common level gauge does not have a high-temperature protection device for the shell, the dust deposition of the probe cannot be continuously and automatically removed, and the level gauge is lower in installation height and is tightly attached to the top of the slag bin, namely the ground of a platform below a slag crusher.

The invention aims to provide an insulating blowing protection system for a level gauge, which comprises:

the top of the charge level indicator protection box body is provided with a box door;

the blowing pipeline penetrates through the side wall of the charge level indicator protection box body through a blowing pipe hole;

the charge level indicator signal cable is connected to the side wall of the charge level indicator protection box body through a charge level indicator cable threading opening;

the material level meter is fixedly connected with a flange and is fixedly arranged in the material level meter protective box body through a flange hole;

the sleeve pipe is raised to the charge level indicator, raise the bushing flange through the charge level indicator and will the position of charge level indicator is raised after certain distance apart from ground with the probe of charge level indicator is installed in the sleeve pipe is raised to the charge level indicator.

Further, the material level indicator protection box body is made of rectangular stainless steel

Furthermore, the purging pipeline is divided into two branches, namely a box purging pipeline for performing box purging and a charge level indicator purging pipeline for performing probe purging.

Further, the level gauge purging pipeline is a metal hard pipe.

Furthermore, the box body purging pipeline purges the air inlet pipe through the charge level indicator protection box and is connected with the air outlet connector of the first purging pipeline through the purging pipe hole of the charge level indicator protection box.

Further, the material level indicator purging pipeline is connected to the side wall of the material level indicator protection box through a material level indicator protection box purging exhaust hole and a purging pipe hole of the second purging pipeline.

Furthermore, a blowing gas adjusting valve is arranged on the blowing pipeline of the level gauge and used for controlling the size of the gas flow.

Further, the purge gas regulating valve is a pointer type regulating valve.

The invention also aims to provide a processing and mounting method of the heat insulation blowing protection system for the level gauge, which comprises the following steps:

1) manufacturing a charge level indicator protection box body, wherein the charge level indicator protection box body is made of rectangular stainless steel materials, and the upper part of the charge level indicator protection box body is provided with a box door capable of being opened;

2) arranging two purging pipe holes for installing purging pipelines, a material level indicator signal cable threading opening and a material level indicator protecting box purging exhaust hole on the side wall of the material level indicator protecting box;

3) a charge level indicator mounting and fixing connecting flange and a charge level indicator lifting sleeve connecting flange are arranged at the bottom in the charge level indicator protecting box body;

4) connecting a purging pipeline of a probe of the charge level indicator to a purging air inlet pipe, and arranging and installing a pressure regulating valve for regulating purging pressure;

5) installing a box body blowing pipeline;

6) welding the bottom of the level indicator and the raw level indicator to a level indicator lifting sleeve connecting flange through a level indicator lifting sleeve;

7) and a probe of the level gauge is arranged in the level gauge lifting sleeve.

The invention also aims to provide a using method of the heat insulation purging protection system for the level gauge, which comprises the following steps:

step 1, heat insulation and purging: in the normal measurement working process of the charge level indicator, a box door at the top of the charge level indicator protective box body is closed and tightly buckled, and a probe of the charge level indicator and the purge gas of the charge level indicator protective box body are continuously purged by introducing compressed air;

and step 2, purging and adjusting: the blowing gas pressure of the charge level indicator probe controls the suitable range of gas quantity through a blowing gas regulating valve in the charge level indicator protective box body, so that the charge level indicator probe can be continuously blown;

step 3, checking a material level meter: and opening a box door at the top of the charge level indicator protective box body for inspection and maintenance when inspecting and maintaining the on-site display value of the charge level indicator.

The invention has the beneficial effects that:

the device has the advantages of probe blowing and heat insulation protection for the slag bin level gauge, beautiful appearance, simplicity and feasibility, easy manufacture and good effect, improves the problems that the design of the raw material level gauge in the practical use can not overcome the severe working environment of the practical production field, namely, the dust accumulation of the probe can not be automatically and continuously blown, and the major hidden trouble problem of the instrument can not be protected when the working medium working flow has high temperature abnormity, a material level meter is additionally provided with a set of material level meter high-temperature protection box, a device for blowing dust deposited on a probe and raising the installation height of the material level meter, the material level meter can effectively protect the shell of the material level meter, continuously sweep the dust accumulated on the probe of the material level meter and raise the mounting height of the material level meter, thereby effectively reducing the daily maintenance amount of maintainers, greatly protecting the material level meter from being directly burnt by leaked high-temperature slag, reducing the defect rate of the slag bin material level meter of a dry slag system of a boiler, and effectively ensuring the safe and reliable operation of the slag bin system and the service life of the material level meter.

Drawings

FIG. 1 is a schematic top view of an insulated purge protection system for a level gauge according to an embodiment of the present invention.

FIG. 2 is a perspective elevation view of an insulated purge protection system for a level gauge according to an embodiment of the present invention.

FIG. 3 is a rear perspective view of an insulated purge protection system for a level gauge according to an embodiment of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but the present invention is not limited thereto.

Referring to fig. 1-3, the present embodiment is an insulated purge protection system for a level gauge, comprising: the top of the charge level indicator protection box body 1 is provided with a box door 11; the blowing pipeline 2 is arranged on the side wall of the charge level indicator protection box body 1 in a penetrating mode through a blowing pipe hole 3; the level indicator signal cable 4 is connected to the side wall of the level indicator protection box body 1 through a level indicator cable threading port 41; the material level meter is fixedly connected with a flange 5, and a material level meter 7 is fixedly arranged in the material level meter protection box body 1 through a flange hole; the sleeve 6 is raised to the charge level indicator, raises the position of charge level indicator 7 through the charge level indicator and installs the probe of charge level indicator 7 in the sleeve 6 is raised to the charge level indicator after certain distance ground is raised to sleeve flange 61. In this embodiment, the level indicator protective box 1 is made of rectangular stainless steel, but other adaptive shapes and heat-resistant materials can be selected.

In the preferred embodiment, the purge line 2 is divided into two branches, namely a tank purge line 21 for performing tank purge and a level gauge purge line 22 for performing probe purge. The level gauge purge line 22 is a metal hard tube. The box body purging pipeline 21 is connected to the side wall of the material level indicator protection box body 1 through a material level indicator protection box purging air inlet pipe air outlet joint 25 and purging pipe holes of the first purging pipeline. The level indicator purging pipeline 22 is connected to the side wall of the level indicator protecting box body 1 through a level indicator protecting box purging exhaust hole 24 and a purging pipe hole of the second purging pipeline. And a purge gas regulating valve 23 is arranged on the level indicator purge pipeline 22 and is used for controlling the size of the gas flow. The purge gas regulating valve 23 is a pointer type regulating valve, but of course, other types of regulating valves may be used as long as the flow rate of the gas flow can be accurately regulated with a certain accuracy.

A processing and mounting method for an insulating blowing protection system of a level gauge comprises the following steps:

1. manufacturing a material level indicator protection box body 1, wherein the material level indicator protection box body 1 is made of rectangular stainless steel materials, and the upper part of the material level indicator protection box body is provided with a box door 11 which can be opened;

2. arranging two purging pipe holes for installing purging pipelines, a signal cable threading opening 41 of the charge level indicator and a purging exhaust hole 24 of the charge level indicator protection box body 1 on the side wall of the charge level indicator protection box body;

3. a charge level indicator installation fixed connecting flange 5 and a charge level indicator lifting sleeve connecting flange 61 are arranged at the bottom in the charge level indicator protection box body 1;

4. connecting a probe purging pipeline 22 of the charge level indicator to a purging air inlet pipe, and arranging and installing a pressure regulating valve for regulating purging pressure;

5. installing a tank purging pipeline 21;

6. welding the bottom of the level indicator 7 and the raw level indicator to a level indicator lifting sleeve connecting flange 61 through a level indicator lifting sleeve 6;

7. the probe of the level gauge 7 is mounted in the level gauge elevation sleeve 6.

Use of an insulated purge protection system for a level gauge, comprising:

step 1, heat insulation and purging: in the normal measurement working process of the charge level indicator 7, a box door 11 at the top of the charge level indicator protective box body 1 is closed and tightly buckled, and a probe of the charge level indicator 7 and the charge level indicator protective box body 1 are continuously purged by introducing compressed air into the purged gas;

and step 2, purging and adjusting: the blowing gas pressure of the probe of the charge level indicator 7 controls the suitable range of the gas quantity through a blowing gas regulating valve 23 in the charge level indicator protection box body 1, so that the probe of the charge level indicator is continuously blown;

step 3, checking a material level meter: when the on-site display value of the charge level indicator is checked and maintained, the box door 11 at the top of the charge level indicator protection box body 1 is opened for checking and maintaining.

The invention has the beneficial effects that:

the device with the probe blowing and the heat insulation protection for the slag bin level indicator has the advantages of beautiful appearance, simplicity, feasibility, easy manufacture and good effect, improves the problem that the design of the original level indicator product in the practical use can not overcome the severe working environment of the actual production field, namely, the dust accumulation of the probe can not be automatically and continuously blown and the major hidden trouble that the instrument can not be protected when the working medium working flow has high temperature abnormity, adds a set of device for high temperature protection box of the level indicator, blowing the dust accumulation of the probe and raising the installation height of the level indicator in the original level indicator product, can effectively protect the shell of the level indicator, continuously blow the dust accumulation of the probe of the level indicator and raise the installation height of the level indicator, effectively reduces the daily maintenance amount of maintainers, greatly protects the level indicator from being directly burned by leaked high temperature slag, and reduces the defect rate of the slag bin level indicator of a boiler dry slag system, effectively ensures the safe and reliable operation of the slag bin system and the service life of the charge level indicator. Through carrying out improvement, installation and debugging operation test operation on the unit boiler slag bin level gauge No. 10 of our company for 3 months, the observation effect is obvious, and the level gauge rarely has the faults of unstable and inaccurate measured values.

The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, the detailed description and the application scope of the embodiments according to the present invention may be changed by those skilled in the art, and in summary, the present disclosure should not be construed as limiting the present invention.