A movable grate bed inter-row sealing device of a grate cooler with soot blowing channel

Abstract

The utility model discloses a movable grate bed inter-row sealing device of grate cooler with soot blowing channel, including the N type sealing cover of fixed in the first longitudinal roof and the U type sealing strip of fixed in adjacent second longitudinal roof, and both plug-in form double labyrinths gap, be equipped with the soot blowing channel of longitudinal through between N type sealing cover inner top and U type sealing strip bottom, and high pressure wind is introduced to the front end, and the fine particle clinker of the interlard labyrinth is blown to the tail end and is discharged. This structure can delay the wear and tear of the gap, reduce the material leakage and reduce the maintenance frequency without improving the manufacturing precision.

Description

Technical Field

[0001] This utility model relates to a sealing device between movable grate beds of a grate cooler with a soot blowing channel. Background Technology

[0002] The grate cooler is a key cooling device in a cement clinker production line. Its movable grate bed consists of multiple rows of longitudinally arranged conveyor beams (longitudinal beams). There are relative movement gaps between each row of longitudinal beams. To prevent high-temperature clinker from leaking into the lower air chamber through the gaps, a labyrinth-type sealing device is usually installed between adjacent longitudinal beams.

[0003] Current fourth-generation grate coolers generally adopt a double labyrinth structure combining an "N-type sealing strip + an L-type pressure strip": the N-type sealing strip is fixed to one longitudinal beam, and the L-type pressure strip is fixed to the other longitudinal beam; the two interlock to form a tortuous channel, relying on the narrow gap to block the clinker from falling. In actual operation, this structure has the following shortcomings: 1. The sealing gap gradually widens due to wear, and the leakage increases exponentially with the running time; after the leaked clinker enters the air chamber, it causes the grate bed resistance to become unbalanced, requiring frequent shutdowns for cleaning, and reducing the production line operating rate.

[0004] 2. To ensure the initial sealing effect, the labyrinth gap design value is usually ≤1mm, which places extremely high demands on sheet metal bending, on-site assembly and the straightness of the longitudinal beams; once manufacturing or installation errors accumulate, if the local gap is too small, the thermal expansion and contraction of the longitudinal beams will easily cause jamming and the sealing strip to break off, and if the gap is too large, material will leak immediately, forming a contradiction of "too tight and it will jam, too loose and it will leak".

[0005] 3. Fine clinker particles cannot be discharged after entering the labyrinth. Under high temperature and relative motion, they become abrasives, accelerating the wear of the sealing strip. The average lifespan is only about 6 months, and the workload and cost of maintenance and replacement are large.

[0006] Therefore, existing technologies still require an inter-row sealing device that can maintain sealing performance over a long period of time, reduce manufacturing and assembly precision requirements, and also has a self-cleaning function. Summary of the Invention

[0007] This utility model provides a sealing device between movable grate beds of a grate cooler with a soot blowing channel to solve the problems existing in the prior art.

[0008] The technical solutions adopted in this utility model are as follows: A sealing device for the movable grate bed of a grate cooler with a soot blowing channel, used to seal the gap between adjacent first and second longitudinal beams, includes: an N-type sealing cover, one side of which is fastened to the top of the first longitudinal beam by a first fastener, and the other side of which extends downward to form a first labyrinth wall; The U-shaped sealing strip is fastened to the top of the second longitudinal beam by the second fastener, with the U-shaped opening facing upward. The outer arc-shaped edge of the U-shaped sealing strip fits against the side wall of the second longitudinal beam, and the inner arc-shaped edge is inserted below the first labyrinth wall of the N-shaped sealing cover, forming a double labyrinth sealing gap together with the N-shaped sealing cover. Between the inner top surface of the N-type sealing cover and the top surface of the U-type sealing strip, there is a blowing channel that runs through the entire length of the grate bed. The front end of the blowing channel is connected to the airflow source and the rear end is open, which is used to continuously blow the fine clinker particles that have entered the double labyrinth sealing gap to the rear end for discharge.

[0009] Furthermore, both the first and second fixing components are countersunk screws.

[0010] Furthermore, the insertion and mating parts of the N-type sealing cap and the U-type sealing strip form a labyrinth structure.

[0011] This utility model has the following beneficial effects: Based on the original double labyrinth structure, a through-flow blowing channel is added. Fine clinker particles entering the labyrinth can be promptly carried to the tail end by high-pressure air, reducing material retention and repeated grinding in the sealed area, and slowing down the rate at which the labyrinth gaps expand due to material accumulation and wear.

[0012] Since fine particles can be continuously blown away, the sealing performance is less sensitive to the labyrinth gap size, allowing for a more relaxed initial gap and manufacturing tolerances, thereby reducing the difficulty of machining and the workload of assembly and adjustment.

[0013] As the wear rate of the sealing strip decreases, the frequency of on-site replacement is reduced accordingly, which can reduce maintenance time and spare parts consumption; at the same time, it reduces the amount of clinker leaking into the air chamber, extends the air chamber cleaning cycle, and helps to improve the operational stability of the equipment. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the present utility model. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] like Figure 1 As shown, the present invention provides a sealing device for the inter-row of movable grate bed in a grate cooler with a soot blowing channel. This device is mainly used to seal the gap between the first and second longitudinal beams of adjacent movable grate beds in the grate cooler, thereby blocking the leakage path of high-temperature clinker to the lower air chamber and ensuring the overall operational stability of the grate cooler.

[0017] The core components of this device are an N-type sealing cap 1, a U-type sealing strip 2, a soot blowing channel 3, a second fixing member 4, and a first fixing member 5. One side of the N-type sealing cap 1 is flatly fitted to the top end face of the first longitudinal beam. Then, the first fixing member 5 is used to fasten this side of the folded edge to the first longitudinal beam. Because the first fixing member 5 is a countersunk screw, its fastening end face can be completely embedded in the pre-set mounting groove of the folded edge of the N-type sealing cap 1, and will not be exposed on the surface of the sealing cap. This avoids the fixing member protruding and causing clinker accumulation or scratching with other components. The other side of the N-type sealing cap 1 extends vertically downward to form a first labyrinth wall. The extension length of this labyrinth wall can match the subsequent insertion requirements of the U-type sealing strip 2, laying the foundation for the formation of the double labyrinth sealing gap.

[0018] After assembling the N-type sealing cap 1, proceed with the fixing of the U-type sealing strip 2. Fit the bottom end face of the U-type sealing strip 2 tightly against the top of the second longitudinal beam. Secure the U-type sealing strip 2 to the second longitudinal beam using the second fixing member 4. The second fixing member 4 also uses countersunk screws, and its installed state is consistent with that of the first fixing member 5, ensuring the flatness of the surface of the U-type sealing strip 2.

[0019] The U-shaped sealing strip 2 has an opening facing upwards. Its outer arc-shaped edge can fit tightly with the side wall of the second longitudinal beam, eliminating the side assembly gap. The inner arc-shaped edge is inserted below the first labyrinth wall of the N-type sealing cover 1. At this time, the first labyrinth wall of the N-type sealing cover 1 and the inner arc-shaped edge of the U-shaped sealing strip 2 will form an interlocking structure. Together, they form a double labyrinth sealing gap. This gap can play a preliminary blocking role against large pieces of clinker falling from the grate bed, greatly reducing the possibility of large pieces of clinker directly leaking into the air chamber.

[0020] After the N-type sealing cover 1 and the U-type sealing strip 2 are assembled, a soot blowing channel 3 will naturally form between them. This channel is located between the inner top surface of the N-type sealing cover 1 and the top surface of the U-type sealing strip 2, and is fully connected along the extension direction between the grate rows. The front end of the soot blowing channel 3 can be connected to the high-pressure airflow source of the grate cooler, while the rear end remains open. When the grate cooler is in operation, the adjacent first and second longitudinal beams will reciprocate relative to each other. A small amount of fine clinker particles will still enter the double labyrinth seal gap. At this time, the high-pressure airflow source will continuously supply airflow to the front end of the soot blowing channel 3. The airflow flows along the channel's direction, which can continuously blow the fine clinker particles that have entered the gap to the rear end of the channel and discharge them, preventing the fine clinker particles from accumulating in the sealing area.

[0021] During the operation of the entire device, the labyrinth structure formed by the interlocking parts of the N-type sealing cover 1 and the U-type sealing strip 2 can extend the clinker's falling path by relying on the tortuous channel, while the airflow purging action of the blowing channel 3 can promptly clean up fine particles that enter the gap. This not only avoids fine particles acting as abrasives to accelerate the wear of the sealing components, but also eliminates the need to set the double labyrinth sealing gap to an extremely small size because the fine particles can be effectively discharged. This reduces the requirements for component manufacturing precision and on-site assembly precision, while also significantly extending the overall service life of the sealing device, reducing the frequency of equipment downtime for maintenance, and ensuring the stable operation of the grate cooler and the entire cement clinker production line.

[0022] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A sealing device between movable grate rows of a grate cooler with a soot blowing channel, used to seal the gap between adjacent first and second longitudinal beams, characterized in that: include: The N-type sealing cap (1) has one side folded edge fastened to the top of the first longitudinal beam by the first fastener (5), and the other side folded edge extends downward to form the first labyrinth wall; The bottom of the U-shaped sealing strip (2) is fastened to the top of the second longitudinal beam by the second fixing member (4), and the U-shaped opening faces upward. The outer arc edge of the U-shaped sealing strip (2) is in contact with the side wall of the second longitudinal beam, and the inner arc edge is inserted below the first labyrinth wall of the N-shaped sealing cover (1), forming a double labyrinth sealing gap together with the N-shaped sealing cover (1). Between the inner top surface of the N-type sealing cover (1) and the top surface of the U-type sealing strip (2), there is a blowing channel (3) that runs through the entire length of the grate bed. The front end of the blowing channel (3) is connected to the airflow source and the tail end is open, which is used to continuously blow the fine clinker particles that have entered the double labyrinth sealing gap to the tail end for discharge.

2. The sealing device between movable grate beds of a grate cooler with a soot blowing channel as described in claim 1, characterized in that: Both the first fixing member (5) and the second fixing member (4) are countersunk screws.

3. The sealing device between movable grate beds of a grate cooler with a soot blowing channel as described in claim 1, characterized in that: The N-type sealing cap (1) and the U-type sealing strip (2) form a labyrinth structure at their insertion points.

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