阅读说明：本技术 一种锅炉水位监测装置 (Boiler water level monitoring device ) 是由 朱明� 姚广晓 迮产明 汪磊 孙斌 于 2019-10-29 设计创作，主要内容包括：本发明涉及一种锅炉水位监测装置,包括与锅炉汽包的内部相连通的储水容器、设置在储水容器与汽侧管接口之间的蒸汽连通管组、设置在储水容器与液侧管接口之间的热水连通管组以及沿竖直方向插设在储水容器上的电容式液位计,储水容器的底部设有排污机构。与现有技术相比,本发明直接通过储水容器顶部安装的电容式液位计测量储水容器内的液位,即可直接得到精确的锅炉水位,信号采集直接,测量值精确可靠；只需对现有的双室平衡容器加差压变送器式液位检测装置稍加改造即可,不会影响蒸汽锅炉系统原有功能,改造成本低,维护检修方便,安全可靠。(The invention relates to a boiler water level monitoring device, which comprises a water storage container communicated with the interior of a boiler steam drum, a steam communication pipe group arranged between the water storage container and a steam side pipe joint, a hot water communication pipe group arranged between the water storage container and a liquid side pipe joint, and a capacitance type liquid level meter inserted on the water storage container along the vertical direction, wherein the bottom of the water storage container is provided with a pollution discharge mechanism. Compared with the prior art, the invention directly measures the liquid level in the water storage container through the capacitance type liquid level meter arranged on the top of the water storage container, so that the accurate boiler water level can be directly obtained, the signal acquisition is direct, and the measured value is accurate and reliable; the existing double-chamber balance container and differential pressure transmitter type liquid level detection device is only required to be slightly modified, the original function of a steam boiler system cannot be influenced, the modification cost is low, the maintenance and the overhaul are convenient, and the safety and the reliability are high.)

1. The utility model provides a boiler water level monitoring device, the device is linked together with the inside of the boiler steam drum (1) of level setting, one end of boiler steam drum (1) one-on-one be equipped with steam side pipe connector (2), liquid side pipe connector (3) respectively, its characterized in that, the device include with the inside water storage container (4) that is linked together of boiler steam drum (1), set up the steam intercommunication nest of tubes between water storage container (4) and steam side pipe connector (2), set up the hot water intercommunication nest of tubes between water storage container (4) and liquid side pipe connector (3) and insert capacitive level gauge (5) on water storage container (4) along vertical direction, the bottom of water storage container (4) be equipped with blowdown mechanism.

2. A boiler water level monitoring device according to claim 1, characterized in that the bottom of the water storage container (4) is at the same height as the bottom of the boiler drum (1).

3. The boiler water level monitoring device according to claim 1, wherein the steam communication pipe set comprises a pair of steam communication pipes (6) arranged in parallel, one end of each steam communication pipe (6) is connected with the steam side pipe joint (2), and the other end of each steam communication pipe is connected with the side surface of the water storage container (4).

4. A boiler water level monitoring device according to claim 3, characterized in that both ends of the steam communicating pipe (6) are provided with a steam communicating pipe stop valve (7).

5. The boiler water level monitoring device according to claim 1, wherein the hot water communication pipe group comprises a pair of hot water communication pipes (8) arranged in parallel, one end of each hot water communication pipe (8) is connected with the liquid side pipe joint (3), and the other end is connected with the side surface of the water storage container (4).

6. The boiler water level monitoring device according to claim 5, wherein both ends of the hot water communication pipe (8) are provided with hot water communication pipe stop valves (9).

7. The boiler water level monitoring device according to claim 1, wherein the bottom end of the capacitance type liquid level meter (5) is lower than the bottom of the liquid side pipe interface (3), and the top end of the capacitance type liquid level meter extends out of the water storage container (4).

8. The boiler water level monitoring device according to claim 1, wherein the drain mechanism comprises a drain pipe (10) arranged at the bottom of the water storage container (4) and a drain pipe upper stop valve (11) arranged on the drain pipe (10).

9. The boiler water level monitoring device according to claim 8, wherein the drain pipe (10) is further provided with a buffer section (12) and a drain pipe lower stop valve (13), and the buffer section (12) is located between the drain pipe upper stop valve (11) and the drain pipe lower stop valve (13).

10. The boiler water level monitoring device according to claim 9, wherein the buffering section (12) is spherical, and the inner diameter of the buffering section (12) is larger than the inner diameter of the soil discharge pipe (10).

Technical Field

The invention belongs to the technical field of boiler water level monitoring, and relates to a boiler water level monitoring device.

Background

At present, the liquid level detection of a steam boiler drum mainly adopts a mode of adding a differential pressure transmitter to a double-chamber balance container, and the liquid level detection is connected to the differential pressure signal transmitter through a pressure guide pipeline according to the pressure difference generated by the water level height in the balance container connected with the steam boiler drum to display the water level value of the boiler. However, if the communication pipe is clogged with foreign matter, a false water level is likely to occur because the communication pipe has a small diameter. In addition, when the outdoor boiler is installed at extremely low temperature in winter, the pressure guide pipe on the original balance container is easy to freeze, so that the water level is abnormal. In addition, the balancing container has the corrosion condition after long-time use, causes the false water level condition to take place, and the boiler operation personnel can't judge in the boiler steam pocket how much water level has after touching this kind of condition, brings very big potential safety hazard for boiler system safe operation.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a boiler water level monitoring device which can accurately acquire a water level signal in a boiler steam drum.

The purpose of the invention can be realized by the following technical scheme:

a boiler water level monitoring device is communicated with the inside of a boiler steam drum which is horizontally arranged, one end of the boiler steam drum is provided with a steam side pipe joint and a liquid side pipe joint one above the other, the device comprises a water storage container communicated with the inside of the boiler steam drum, a steam communication pipe group arranged between the water storage container and the steam side pipe joint, a hot water communication pipe group arranged between the water storage container and the liquid side pipe joint and a capacitance type liquid level meter inserted on the water storage container along the vertical direction, and a sewage discharging mechanism is arranged at the bottom of the water storage container. High-temperature steam in the boiler steam drum is communicated with the inside of the water storage container through a steam side pipe joint and a steam communication pipe group, and high-temperature water in the boiler steam drum is communicated with the inside of the water storage container through a liquid side pipe joint and a hot water communication pipe group.

Furthermore, the bottom of the water storage container and the bottom of the boiler drum are positioned at the same height. And the water level monitoring precision is ensured.

Furthermore, the steam communicating pipe group comprises a pair of steam communicating pipes arranged in parallel, one end of each steam communicating pipe is connected with the steam side pipe connector, and the other end of each steam communicating pipe is connected with the side face of the water storage container. The two steam communicating pipes work alternately, and when one of the two steam communicating pipes needs to be overhauled, the other steam communicating pipe is switched.

Furthermore, both ends of the steam communicating pipe are provided with a steam communicating pipe stop valve. The stop valves of the two ends of one steam communicating pipe are opened or closed simultaneously so as to enable the steam communicating pipe to be in a working state or a maintenance/standby state.

Furthermore, the hot water communicating pipe group comprises a pair of hot water communicating pipes which are arranged in parallel, one end of each hot water communicating pipe is connected with the liquid side pipe joint, and the other end of each hot water communicating pipe is connected with the side surface of the water storage container. The two hot water communicating pipes work alternately, and when one hot water communicating pipe needs to be overhauled, the other hot water communicating pipe is switched.

Furthermore, both ends of the hot water communicating pipe are provided with hot water communicating pipe stop valves. The hot water communication pipe stop valves at both ends of one hot water communication pipe are opened or closed simultaneously to make the hot water communication pipe in a working state or a maintenance/standby state.

Furthermore, the bottom end of the capacitance type liquid level meter is lower than the bottom of the liquid side pipe interface, and the top of the capacitance type liquid level meter extends out of the water storage container. The capacitance type liquid level meter can obtain the water level in the boiler steam drum by directly measuring the water level in the water storage container.

Furthermore, the sewage draining mechanism comprises a sewage draining pipe arranged at the bottom of the water storage container and a stop valve arranged on the sewage draining pipe. And opening the stop valve on the drain pipe periodically to discharge the sundries accumulated in the water storage container.

Furthermore, the sewage discharge pipe is also provided with a buffer section and a sewage discharge pipe lower stop valve, and the buffer section is positioned between the sewage discharge pipe upper stop valve and the sewage discharge pipe lower stop valve. When the device runs for a long time, the upper stop valve of the drain pipe can be opened and the lower stop valve of the drain pipe can be closed, so that sundries accumulated in the water storage container can fall into the buffer section through the drain pipe in time, and the normal measurement of the water level in the water storage container by the capacitance type liquid level meter is prevented from being influenced; when the sewage is required to be drained, the upper stop valve of the sewage draining pipe is closed, the lower stop valve of the sewage draining pipe is opened, sundries stored in the buffer section are discharged to the outside, and meanwhile, the normal water level inside the water storage container and the stable measurement of the capacitance type liquid level meter cannot be influenced.

Furthermore, the buffer section is spherical, and the inner diameter of the buffer section is larger than that of the sewage discharge pipe. The spherical buffer section can store a certain amount of sundries.

Under the condition that the original function is not influenced, a high-temperature-resistant water storage container similar to the boiler steam drum is arranged by utilizing the principle of a communicating vessel, the performance parameters of the water storage container and the boiler steam drum are the same, high-temperature steam and high-temperature water in the boiler steam drum are led out to the interior of the water storage container at the same time, the water level in the boiler steam drum is enabled to be consistent with the water level in the water storage container, and the accurate boiler water level can be obtained by measuring the liquid level in the water storage container through a capacitance type liquid level meter arranged at the top of the water storage container. The sewage draining mechanism is convenient for the regular sewage draining of the water storage container.

Compared with the prior art, the invention has the following characteristics:

1) the liquid level in the water storage container is directly measured by a capacitance type liquid level meter arranged at the top of the water storage container, so that the accurate boiler water level can be directly obtained, the signal acquisition is direct, the measured value is accurate and reliable, and the adverse effects of icing of a pressure guide pipeline on the original double-chamber balance container at extremely low temperature and corrosion and scaling of the pipeline on the water level measurement accuracy are avoided;

2) the existing double-chamber balance container and differential pressure transmitter type liquid level detection device is only required to be slightly modified, the original function of a steam boiler system cannot be influenced, the modification cost is low, the maintenance and the overhaul are convenient, and the safety and the reliability are high.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

the notation in the figure is:

1-boiler drum, 2-steam side pipe interface, 3-liquid side pipe interface, 4-water storage container, 5-capacitance level gauge, 6-steam communicating pipe, 7-steam communicating pipe stop valve, 8-hot water communicating pipe, 9-hot water communicating pipe stop valve, 10-blow off pipe, 11-blow off pipe upper stop valve, 12-buffer section, 13-blow off pipe lower stop valve.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.