CN220829315U - Leakage-proof detection device for coal economizer - Google Patents

Abstract

The utility model provides a leakage-proof detection device of an economizer, which comprises two end plates, a plurality of serpentine pipes, a longitudinal screw rod and a moving plate, wherein the two end plates are fixedly arranged; the two end plates and the bottom of the movable plate are respectively provided with a bottom frame, the bottoms of the bottom frames are provided with water collecting tanks, and water immersion sensors are embedded in the water collecting tanks. The leakage-proof detection device of the coal economizer has the advantages of moderate monitoring speed, no serious leakage and no longer residual service time.

Description

Leakage-proof detection device for coal economizer

Technical Field

The utility model relates to an economizer, in particular to a leakage-proof detection device of the economizer.

Background

The economizer is arranged at the lower part of the tail flue of the boiler, high-temperature flue gas flows through the economizer from the outside and exchanges heat with fluid in the coiled pipe to recover the waste heat of the flue gas; however, dust is mixed in the high-temperature flue gas, when the flue gas flows through the outer wall of the coiled pipe, the dust can be gradually deposited, and the deposited dust can corrode the pipe wall over time, so that leakage occurs. The traditional economizer leakage detection is mainly judged by means of temperature difference of inlet and outlet flue gas, pressure difference of an economizer pipeline and the like, but the difference is very small at the initial stage of leakage, and judgment can be made only after leakage reaches a certain degree, but the water supply amount entering the boiler at the moment is obviously larger than the steam flow of the outflow boiler, and when serious, a large amount of ash water flows out of a flue and the boiler needs to be shut down for maintenance.

In order to find leakage in advance, patent CN201210229923.5 discloses a leakage judging method for a power station boiler economizer, which judges whether the economizer leaks or not by accumulating the water supply flow and the steam flow in units of flow per second, so that the tiny change is amplified through accumulation of fixed time; patent CN201710267307. X discloses a device and a method for predicting leakage of a heat exchange tube bundle of a low-temperature economizer of a boiler flue of a power plant, which are used for predicting the abrasion state of a serpentine tube in advance by designing two rows of abrasion-proof false tubes working without water on a windward side and monitoring the conditions of the abrasion-proof false tubes. However, when the leakage is detected, the condition of the economizer is relatively good, and the economizer can be used for a period of time without replacement, and certain waste exists in the replacement.

In order to solve the above problems, an ideal technical solution is always sought.

Disclosure of Invention

The utility model aims at overcoming the defects of the prior art, and provides the leakage-proof detection device for the coal economizer, which has moderate monitoring speed, does not cause serious leakage and does not leave longer service time.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a coal economizer leak protection detection device, includes two end plates of fixed setting, a plurality of coiled pipe, vertical lead screw and the movable plate of vertical arrangement, every the both ends of coiled pipe are all installed two end plates, the both ends of vertical lead screw are installed two end plates, the movable plate has seted up the through-hole respectively corresponding to the straight tube section of every coiled pipe, vertical lead screw drive the movable plate moves between two end plates; the two end plates and the bottom of the movable plate are respectively provided with a bottom frame, the bottoms of the bottom frames are provided with water collecting tanks, and water immersion sensors are embedded in the water collecting tanks.

Based on the above, the water collecting tank comprises a central tank and four diversion tanks, the water immersion sensor is embedded in the central tank, and the four diversion tanks are symmetrically arranged in the four corners of the central tank; the outer end of the guide groove extends to the end part of the bottom frame, the inner end of the guide groove is communicated with the central groove, the groove wall of the guide groove is obliquely arranged from the upper part of the outer end to the lower part of the inner end, and the guide groove is arranged towards the side surface of the thickness direction of the bottom frame in an open mode.

Based on the above, the water receiving plate is arranged below the central groove, and the edge of the water receiving plate is connected to the bottom end of the groove wall of the central groove.

Based on the above, the bottom frame is detachably mounted to the end plate/the moving plate bottom by bolts.

Based on the above, four guide sliding rods are further connected to the two end plates, and the four guide sliding rods respectively penetrate through four corners of the moving plate.

Compared with the prior art, the utility model has substantial characteristics and progress, in particular to the utility model, by arranging the water collecting tank on the bottom frame and arranging the water immersion sensor in the water collecting tank, two end plates can guide water leakage near two ends of the coiled pipe, the moving plate can guide water leakage in the middle section of the coiled pipe, and when the leaked water flows into the water collecting tank of the bottom frame along the plate surface, the leaked water is detected by the water immersion sensor; when the coiled pipe is slightly leaked, the leaked water is directly evaporated, the water immersion sensor cannot detect the leaked water, when the leaked water is not evaporated, the water immersion sensor achieves the detection function of water leakage, the service life of the economizer is basically up, serious leakage does not occur yet, and the device has the advantages of moderate monitoring speed, no serious leakage and long service time.

Further, the four diversion trenches can guide water leakage in the front and back and left and right sides of the panel surface into the central trench, so that the water immersion sensor can conveniently detect the water leakage; the water receiving plate can slow down water leakage and loss in the central groove and improve detection sensitivity on one hand, and can play a role in protecting the water sensor on the other hand; the bottom frame is detachably installed, so that the bottom frame is convenient to install on a new coal economizer for recycling; the four guide sliding rods can control the moving direction of the moving plate, and clamping is reduced.

Drawings

Fig. 1 is a schematic structural view of an economizer leak-proof detection device in the present utility model.

Fig. 2 is a schematic view of the structure of the moving plate in the present utility model.

Fig. 3 is a bottom view of the bottom frame of the present utility model.

In the figure: 1. an end plate; 2. a serpentine tube; 3. a longitudinal screw; 4. a moving plate; 5. a through hole; 6. a bottom frame; 7. a water immersion sensor; 8. a central slot; 9. a diversion trench; 10. a water receiving plate; 11. a bolt; 12. and a guide slide bar.

Detailed Description

The technical scheme of the utility model is further described in detail through the following specific embodiments.

As shown in fig. 1-3, the anti-leakage detection device of the coal economizer comprises two end plates 1 which are fixedly arranged, a plurality of serpentine pipes 2 which are longitudinally arranged, a longitudinal screw rod 3 and a moving plate 4, wherein two ends of each serpentine pipe 2 are arranged on the two end plates 1, two ends of each longitudinal screw rod 3 are arranged on the two end plates 1, through holes 5 are respectively formed in the moving plate 4 corresponding to straight pipe sections of each serpentine pipe 2, the longitudinal screw rod 3 drives the moving plate 4 to move between the two end plates 1, and the longitudinal screw rod 10 can be driven manually through a rocker or electrically by using a driving motor; the two end plates 1 and the bottom of the movable plate 4 are respectively provided with a bottom frame 6, the bottoms of the bottom frames 6 are provided with water collecting tanks, and water immersion sensors 7 are embedded in the water collecting tanks.

The water collecting tank specifically comprises a central tank 8 and four diversion tanks 9, the water immersion sensor 7 is embedded in the central tank 8, and the four diversion tanks 9 are symmetrically arranged in the four corners of the central tank 8; the outer end of the guide groove 9 extends to the end part of the bottom frame 6, the inner end of the guide groove 9 is communicated with the central groove 8, the groove wall of the guide groove 9 is obliquely arranged from the upper part of the outer end to the lower part of the inner end, the guide groove 9 is arranged towards the side surface opening of the bottom frame 6 in the thickness direction, and therefore water leakage of the front and back sides and the left and right sides of a plate can be guided into the central groove 8, and the water immersion sensor 7 can conveniently realize a detection function.

Working principle:

The water collecting tank is arranged on the bottom frame 6, the water immersion sensors 7 are arranged in the water collecting tank, two end plates 1 can guide water leakage near two ends of the coiled pipe 2, the movable plate 4 can guide water leakage in the middle section of the coiled pipe 2, and when the leaked water flows into the water collecting tank of the bottom frame 6 along the plate surface, the leaked water is detected by the water immersion sensors 7; when the coiled pipe 2 slightly leaks, the leaked water is directly evaporated, the water immersion sensor 7 cannot detect the water, when the leaked water is not evaporated, the water immersion sensor 7 realizes the detection function of water leakage, the service life of the economizer is basically up, serious leakage does not occur yet, and the monitoring speed is moderate.

In order to improve the detection sensitivity, a water receiving plate 10 is arranged below the central groove 8, and the edge of the water receiving plate 10 is connected to the bottom end of the groove wall of the central groove 8; when in use, the water receiving plate 10 can slow down the water leakage loss in the central groove 8, thereby improving the sensitivity and also playing a role in protecting the water sensor 7.

For convenient recycling, the bottom frame 6 is detachably mounted on the bottom of the end plate 1/the movable plate 4 through bolts 11, and can be used continuously after being mounted on a new economizer from an old economizer.

In order to reduce blocking, four guide slide bars 12 are further connected to the two end plates 1, the four guide slide bars 12 respectively penetrate through four corners of the moving plate 4, and when the movable plate 4 is used, the four guide slide bars 12 can control the direction of the moving plate 4 not to deviate.

Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present utility model and are not limiting; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.

Claims (5)

1. The utility model provides an economizer leak protection detection device, includes two end plates of fixed setting and a plurality of coiled pipe of vertical arrangement, every the both ends of coiled pipe are all installed two on the end plate, its characterized in that: the device also comprises a longitudinal screw rod and a moving plate, wherein two ends of the longitudinal screw rod are arranged on the two end plates, through holes are respectively formed in the moving plate corresponding to the straight pipe sections of each serpentine pipe, and the longitudinal screw rod drives the moving plate to move between the two end plates; the two end plates and the bottom of the movable plate are respectively provided with a bottom frame, the bottoms of the bottom frames are provided with water collecting tanks, and water immersion sensors are embedded in the water collecting tanks.

2. The economizer leak detection device of claim 1, wherein: the water collecting tank comprises a central tank and four diversion tanks, the water immersion sensor is embedded in the central tank, and the four diversion tanks are symmetrically arranged in the four corners of the central tank; the outer end of the guide groove extends to the end part of the bottom frame, the inner end of the guide groove is communicated with the central groove, the groove wall of the guide groove is obliquely arranged from the upper part of the outer end to the lower part of the inner end, and the guide groove is arranged towards the side surface of the thickness direction of the bottom frame in an open mode.

3. The economizer leak detection device of claim 2, wherein: the water receiving plate is arranged below the central groove, and the edge of the water receiving plate is connected to the bottom end of the groove wall of the central groove.

4. A leakage prevention detection apparatus for an economizer according to any one of claims 1 to 3, wherein: the bottom frame is detachably mounted at the bottom of the end plate/the movable plate through bolts.

5. The economizer leak detection device of claim 4, wherein: four guide sliding rods are further connected to the two end plates, and penetrate through four corners of the moving plate respectively.