A reciprocating grate device

Abstract

The utility model provides a reciprocating grate device, belonging to the field of boiler combustion equipment, the grate device comprises A-type grate pieces and B-type grate pieces that are matched and arranged at intervals, and the grate pieces have heat dissipation ribs. The utility model improves the heat deformation resistance of the grate pieces under continuous high-temperature stress conditions by adding heat dissipation ribs on the A and B type grate pieces and increasing the heat dissipation ratio; controls the lateral reserved expansion of the grate by combining modules and grouping; compresses the free space between the grate pieces inside the module group, and combines the design structure on the grate pieces to form mutual clamping of the left and right adjacent grate pieces; prevents the damaged grate pieces from detaching from the module group; under the condition of mutual restraint and clamping between the grate pieces inside the module group, in each reciprocating stroke cycle, the A and B type grate pieces can be implemented in the process of operation, alternately rising and falling, mutually shifting, and timely cleaning of the retained objects in the ventilation duct between the grate pieces to keep the air duct unobstructed.

Description

Technical Field

[0001] The utility model relates to the field of boiler combustion equipment, and specifically, the utility model relates to a reciprocating grate device. Background Art

[0002] As we all know, the reciprocating grate is one of the two mainstream equipment of the side-feeding mechanical grate. Its semi-dynamic disturbance combustion mode of the coal layer carried in the furnace is better than the full static undisturbed combustion mode of the chain grate in the furnace combustion process. However, it does not occupy a dominant share in the matching share of large and medium-sized layer-fired boilers and combustion equipment. The main reason is that the existing reciprocating grate has the following shortcomings in terms of equipment operation reliability, the relationship between handling the coal leakage prevention of the grate pieces and keeping the longitudinal ventilation ducts between the grate pieces unobstructed, and the relationship between the coal leakage prevention of the grate pieces and the spacing of the horizontal free expansion joints of the grate pieces:

[0003] 1. The grate pieces of the reciprocating grate in the main combustion section are subjected to high-temperature carbon fire baking for a long time, and lack the periodic circulation cooling conditions of the chain grate, resulting in the cooling conditions of the reciprocating grate being inferior to those of the chain grate. The cooling of the reciprocating grate mainly relies on forced ventilation. Once the furnace is stopped and the fire is suppressed, or the air duct and air holes are blocked, the grate pieces are prone to burn out when the air supply is insufficient, especially the grate pieces with a small design heat dissipation ratio are more likely to burn out.

[0004] 2. The reciprocating grate does not have the conditions to replace the burned grate pieces in front of the furnace. Once the grate falls off after burning, the furnace must be stopped for maintenance immediately, otherwise it is easy to expand the accident and burn the wind chamber and grate beam. Therefore, the existing reciprocating grate is not as convenient as the chain grate in replacing the burned grate pieces.

[0005] 3. The existing reciprocating grate is designed to lack effective anti-detachment limit settings for the fragments after burning and breaking.

[0006] 4. The heat dissipation ratio of existing reciprocating grates is limited by the height of the grate head and the movement elevation angle of the grate, and the movement elevation angle is limited by the minimum sliding angle between the coal particles and the metal surface of the grate, and the output torque of the grate reducer. Therefore, the existing grate is limited by the above factors, the heat dissipation ratio is small, the heat deformation resistance is poor, and it is easy to burn.

[0007] 5. The existing narrow grate lacks precise control over the horizontal spacing of the ventilation ducts between the left and right adjacent grate slices and the horizontal reserved expansion gap of the grate slices. Once the control is improper, the following problems will occur:

[0008] 5.1. When the reserved amount of expansion joint is too large, the horizontal spacing of the ventilation ducts between the grate plates will be increased, resulting in increased coal leakage from the bottom coal layer in front of the grate.

[0009] 5.2. Because the front side blocks of the existing grate plates are used to maintain the ventilation gap between the grate plates, most of them are placed in the section of the grate surface where the heat is strongest near the head of the grate plate. When the reserved amount of the expansion joint is too small, the main combustion section in the middle of the grate will transfer the lateral accumulated thermal expansion to the guard plate on both sides of the grate through the front side blocks during the lateral thermal expansion process, which will jam the grate and damage the reducer or grate moving beam.

[0010] 5.3. When the free expansion joints are not controlled in transverse sections, the reserved expansion joints will be concentrated and shifted to one side during the movement of the grate. This will cause the damaged grate fragments to detach when the grate is in a low temperature state because the accumulated reserved expansion gap is larger than the installation gap and the left and right clamping constraints are lost.

[0011] 6. The existing reciprocating grate is designed to prevent leakage by blocking, and lacks the function of automatically cleaning the residues that fall into the ventilation duct between the grate pieces. The residues in the ventilation duct will reduce the cooling efficiency of the grate pieces and cause poor ventilation on the grate surface, affecting the normal combustion in the coal seam. Therefore, the automatic cleaning function of the residues is not as good as the automatic cleaning function of the scale-type chain grate that throws off the residues during the downward turning process in each cycle.

[0012] 7. The existing horizontal wide-blade grate cannot provide continuous and stable air supply to the moving bottom coal layer due to the large blind corner area between the middle ventilation holes and the small ventilation area ratio, which will lead to a decrease in the combustion rate of the bottom coal layer and increase the carbon content of the slag. Therefore, the air supply uniformity and heat dissipation ratio of the wide-blade grate to the bottom coal layer are not as good as those of the beam-type chain grate and the scale-type chain grate. Utility Model Content

[0013] In order to solve the technical problems existing in the prior art and make the reciprocating grate surpass the chain grate in all aspects of performance, the utility model starts from the following points to improve the performance of the reciprocating grate.

[0014] 1. Further improve the heat dissipation ratio of the reciprocating grate, improve the anti-burning performance of the grate plate, reduce the burning rate of the grate plate from the source, and improve the reliability of equipment operation.

[0015] 2. Further improve the ability of the reciprocating grate to prevent the broken pieces from being separated, expand the scope of the constraint to prevent the broken pieces from being separated, and avoid the expansion of accidents due to the broken pieces being separated. Under the premise of not increasing the amount of carbon fire leakage of the grate, the reciprocating grate is given the ability to hold the broken pieces and continue to operate in the short term, leaving time for production scheduling for users.

[0016] 3. Change the existing design thinking of grate plates in the internal structure design of the ventilation duct, which is more focused on blocking than unblocking. A combination of blocking and unblocking should be adopted, and an automatic cleaning device should be installed for the coal dust and ash residue trapped in the grate plate air duct. It is used to keep the ventilation duct unblocked at all times to ensure the ventilation and cooling effect of the grate plates and improve the combustion efficiency of the coal layer carried.

[0017] 4. According to the total lateral expansion of the grate, the reserved expansion is reasonably controlled by lateral segmentation and grouping. On the premise of ensuring that the reserved lateral thermal expansion of the grate will not jam the grate, the free space of the grate pieces and damaged fragments is compressed to reduce coal leakage.

[0018] The utility model provides a novel reciprocating grate, comprising an A-type grate sheet and a B-type grate sheet, wherein the A-type grate sheet and the B-type grate sheet are paired with each other and arranged at intervals on the left and right sides, and both the A-type grate sheet and the B-type grate sheet comprise reinforcing ribs (12), and a first heat dissipation rib group and a second heat dissipation rib group are added on the left and right sides of the reinforcing ribs (12). By adding heat dissipation ribs, the heat dissipation area of ​​the grate sheet is further increased, so as to improve the heat deformation resistance of the grate sheet in the main combustion zone of the furnace under the continuous high-temperature stress state, and the heat expansion deformation resistance of the grate sheet in the absence of strong wind cooling during the shutdown period of the furnace.

[0019] Furthermore, a first heat dissipation rib group (14) and a second heat dissipation rib group (14.1) are respectively provided on the left and right sides of the A and B type grate plate reinforcement ribs (12), and are cast integrally with the reinforcement ribs. The two groups of heat dissipation ribs on the left and right sides of the reinforcement ribs are arranged obliquely, and the projection axes of the first heat dissipation rib group and the second heat dissipation rib group on the reinforcement ribs do not overlap. The spacing between the ribs of each group of heat dissipation ribs of the A type grate plate and the B type grate plate is parallel and equidistantly distributed.

[0020] Furthermore, the two groups of heat dissipation ribs on the left and right sides of the reinforcing ribs are evenly distributed with a staggered spacing of 1 / 2 of the rib spacing, and the two groups of heat dissipation ribs provided on the A and B type grates have different setting angles.

[0021] 1. The functions and benefits of setting up heat dissipation ribs are:

[0022] 1.1. The additional heat dissipation area brought by adding heat dissipation ribs can increase the heat dissipation ratio of the grate plate at the mid-stroke distance to about 5 to 12 according to different design requirements, which is used to improve the anti-burning performance and anti-thermal deformation performance of the grate plate.

[0023] 1.2. When the damaged grate fragments flip to the left and right, they will cross and collide with the heat dissipation ribs with different inclination angles on the adjacent two sides, preventing the heat dissipation ribs of the fragments from cutting into the gaps between the adjacent heat dissipation ribs, thereby limiting the flipping angle of the fragments, compressing the free space of the fragments, and preventing the fragments from falling off.

[0024] The transverse reserved expansion joints of the grate pieces are controlled in sections and groups to prevent the grate pieces from breaking and flipping sideways and falling off to the left or right when the cumulative offset to one side during movement is greater than the assembly gap of the grate pieces.

[0025] Furthermore, the connection device comprises a bracing rod and a stop pin. A transverse bracing rod connection hole (12.1) and (12.2) are respectively provided at the front and rear ends of the grate plate reinforcement rib (12), and two bracing rods (12.3) provided with the same size of positioning distance and positioning pins. One end of the bracing rod has a head, and the other end is provided with a stop hole, and the stop pin passes through the stop hole. The two types of grate plates A and B are matched into a pair, and 2 to 5 pairs are formed into a group, and two bracing rods (12.3) provided with a positioning distance are used to connect them in series transversely to form a combined module.

[0026] Furthermore, the positioning distance set by the positioning pin of the bracing rod is the design spacing between the left and right ends of the module group, plus the lateral expansion reserve of the module group and the thickness of the gasket, as the setting distance of the lateral positioning pin hole. The bracing rod connection hole (12.1) at the head of the grate plate is set on the reinforcing rib (12), and is arranged diagonally up and down, so as to put the broken pieces of the heating surface of each section of the grate plate into the constraint range between the front and rear bracing rods as much as possible. The hole diameter of the bracing rod connection hole is 2 to 4 mm larger than the diameter of the bracing rod.

[0027] Furthermore, the connecting hole includes a first connecting hole and a second connecting hole, the first connecting hole is at the front end of the type A grate plate and the type B grate plate, the second connecting hole is at the rear end of the type A grate plate and the type B grate plate, and the height of the center line of the first connecting hole is lower than the height of the center line of the second connecting hole.

[0028] 2. The functions and benefits of using a tension rod are:

[0029] 2.1. Control the accumulated reserved expansion between the grate pieces in each module group, and implement lateral activity spacing constraints on the fragments in the module group to prevent the fragments from flipping and falling off laterally from the ventilation duct gap and the accumulated reserved expansion gap.

[0030] 2.2. Control the parallelism of the longitudinal free ventilation gaps between the grate plates in the module group to reduce coal leakage.

[0031] 2.3. The distance between the hole diameter of the brace rod connection hole on the reinforcement rib of the A and B grate slices and the diameter of the brace rod can leave space for the adjacent A and B grate slices to move up and down during movement. It is used to break the slag attached to the ventilation duct to keep the duct unobstructed, and can also form a second activity spacing constraint on the up and down staggered spacing between the grate slices in the module group.

[0032] The transverse side strip tenons (13) and transverse side strip slots (13.1) are respectively arranged on the left and right sides of the A and B type grate plate surface beams (1). The transverse side strip tenons are located on one side of the reinforcing ribs, protruding toward the side away from the reinforcing ribs, and have an outer shape of a trapezoid with the inclined surface facing upwards; the transverse side strip slots are located on the other side of the reinforcing ribs, and are concave toward one side of the reinforcing ribs. The two can cooperate with the upper end of the heat dissipation ribs of the grate plate to form a suspended tongue-and-groove structure similar to that without a closed bottom plate, which can not only smoothly discharge coal dust and ash in the air duct, but also implement upper, lower, left, right, and limit clamping of damaged fragments.

[0033] Furthermore, the transverse side strip tenons (13) and the transverse side strip slots (13.1) are arranged on the left and right sides of the grate face beam (1), and the appearance is a three-section upper folding and lower returning structure, which rises and falls with each section of the grate face beam.

[0034] Furthermore, the transverse side strip tenon (13) and the grate face beam (1) are cast as one body, and are transverse, forming a tapered inclined tenon from the inside to the bottom, wherein the downward inclination angle of the upper transverse inclined slope is greater than 19°, and the bottom of the tenon is parallel to the transverse grate face of the face beam.

[0035] Furthermore, the ventilation duct between the adjacent grate face beams (1) and the transverse side strip tenons (13), and the ventilation duct between the adjacent transverse side strip tenon groove walls are gradually expanding channels that are narrow at the top and wide at the bottom.

[0036] Furthermore, the first heat dissipation rib group on the A-type grate slice is staggered with the second heat dissipation rib group on the adjacent B-type grate slice, and the second heat dissipation rib group on the A-type grate slice is staggered with the first heat dissipation rib group on the adjacent B-type grate slice.

[0037] 3. The functions and benefits of using transverse edge strip tenons and transverse edge strip slots are:

[0038] 3.1. The above-mentioned double-tension support rod (12.3) can be combined to implement upper, lower, left, right, front, and rear position limits on the damaged fragment to prevent the fragment from falling off, thus forming a third level of movable spacing constraint on the fragment.

[0039] 3.2. The coal dust and ash slag falling on the upper slope of the horizontal edge strip can slide down smoothly and be discharged from the ventilation duct, so as to keep the ventilation duct between adjacent grate plates unobstructed at all times.

[0040] The front side block on the side of the existing reciprocating grate face beam, which is used to maintain the ventilation gap between the grate slices, is moved from the working section with the highest heating intensity at the grate head to the working section with the lowest heating intensity and the best cooling condition at the grate head.

[0041] Furthermore, the grate front side block (16.1) is arranged in a dual air supply cooling section that can simultaneously receive horizontal air supply and vertical air supply from bottom to top, that is, the side portion of the arc-shaped foot (11) of the grate head thrust section.

[0042] 4. The functions and benefits of changing the position of the front side block are:

[0043] 4.1. The longitudinal ventilation duct between the two side blocks at the front and rear of the grate can be used as the transverse reserved expansion joint of the grate to freely absorb the transverse expansion of the adjacent grate grates on the left and right sides in the high-temperature heating section. Since the width of the air duct between the grate grates is much larger than the transverse expansion of a single grate grates in the high-temperature section, it can prevent the transverse expansion of the grate grates in the high-temperature heating section from accumulating and transferring to the left and right side guard plates of the grate, thereby blocking the grate.

[0044] 4.2. It is helpful to move the foreign matter half stuck in the longitudinal ventilation duct of the grate along with the coal seam, and discharge the foreign matter forward along the longitudinal barrier-free ventilation duct, so as to avoid the hard foreign matter from scratching or breaking the grate in the process of transferring the lateral accumulated expansion of the grate.

[0045] 4.3. It is helpful to reduce the temperature of the side block (16.1) section at the front of the grate and reduce the lateral cumulative thermal expansion transferred to the left and right sides of the grate.

[0046] The A-type grate plate and the B-type grate plate face beam travel section (2) are both provided with arc-shaped grooves (2.1), (2.2).

[0047] Furthermore, the arc groove (2.1) on the A-type grate plate and the arc groove (2.2) on the adjacent B-type grate plate are arranged in a longitudinal front-to-back staggered arrangement with the midline of the travel section as the boundary.

[0048] Furthermore, the arc-shaped groove cooperates with the arc-shaped bottom foot (11) of the thrust section, so that the A and B type grate plates can perform alternating up and down movements in each reciprocating stroke cycle, utilizing the constraint gap between the hole diameter of the tension rod connecting hole (12.1) (12.2) provided on the reinforcing rib (12) and the diameter of the tension rod, and the constraint gap between the transverse side strip tenon and the transverse side strip tenon groove.

[0049] 5. The functions and benefits of setting arc grooves are:

[0050] 5.1. In each reciprocating cycle, the A and B grate plates can perform 2 to 4 up and down movements to shear, squeeze and crush the slag attached to the ventilation duct between adjacent grate plates, so as to discharge the slag downwards. This is used to keep the air duct unobstructed and ensure the cooling effect of the small ambient airflow on the grate plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is a front view of an A-type grate sheet according to an embodiment of the utility model;

[0052] Figure 2 This is a front view of a B-type grate sheet according to an embodiment of the utility model;

[0053] Figure 3 for Figure 1 Sectional view at AA;

[0054] Figure 4 A top view of a grate assembly module according to an embodiment of the utility model;

[0055] Figure 5 for Figure 4 Cross-section at the middle BB;

[0056] Figure 6 A top view of an A-type grate sheet according to an embodiment of the utility model;

[0057] Figure 7 This is a top view of a B-type grate sheet according to an embodiment of the utility model.

[0058] The corresponding relationship between the numbers in the figure and the grate parts is as follows:

[0059] A grate plate surface beam (1), a travel section (2), an arcuate groove (2.1) of a type A grate plate travel section, an arcuate groove (2.2) of a type B grate plate travel section, an arcuate foot (11) of a lower thrust section, a reinforcing rib (12), a tie rod connecting hole (12.1) at the head of the reinforcing rib, a tie rod connecting hole (12.2) at the tail of the reinforcing rib, a transverse tie rod (12.3), a transverse side strip tenon (13), a transverse side strip tenon groove (13.1), a first heat dissipation rib group (14), a second heat dissipation rib group (14.1), a grate plate tail groove (15), a grate plate tail side block (16), and a grate plate head side block (16.1). DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, the various features in each embodiment can be combined with each other, and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0061] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0062] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0063] Example 1

[0064] As attached Figure 1-Figure 7 As shown, the utility model provides a reciprocating grate device, using the surface extension lines of the travel sections (2) of the two types of grate plates A and B as the reference lines of the horizontal X axis when designing the grate plates;

[0065] The angles of the slope of the upward inclined section of the grate plate, the slope of the downward inclined section, and the angle of the heat dissipation rib setting are all based on the reference line of the X-axis.

[0066] The angle between the slope of the upward inclined section of the two types of grate plates A and B and the X-axis reference line can be adjusted according to different design and use requirements of the horizontal reciprocating grate or the inclined reciprocating grate. Starting from the front section of the stroke section (2), the angle is inclined 13° to 33° upward, so that the heat dissipation surfaces on both sides of the longitudinal direction of the grate plate expand in a fan-shaped manner in the upward and downward directions, forming the basic heat dissipation area of ​​the grate plate.

[0067] On the basis of increasing the basic heat dissipation area of ​​the A and B type grate plates as mentioned above, a first heat dissipation rib group (14) and a second heat dissipation rib group (14.1) are respectively provided on the left and right sides of the reinforcing rib (12) and are cast as one piece with the reinforcing rib. The first heat dissipation rib groups on both sides of the A type grate plate are set at an inclination angle of 45°±10°, and the second heat dissipation rib groups on both sides of the B type grate plate are set at an inclination angle of 30°±10°, for example but not limited to (the reverse is also possible).

[0068] There is a height difference between the heat dissipation ribs on both sides of the reinforcing ribs. The upper end of the heat dissipation rib located on one side of the transverse edge strip tenon is cast as one piece with the bottom of the surface beam (1). Located below the transverse tenon groove, the upper end of the heat dissipation rib is 1 to 4 mm lower than the horizontal extension line of the bottom of the surface beam (1).

[0069] The horizontal arrangement spacing between the heat dissipation fins on the same side can be arranged in parallel and evenly at a spacing of 15 to 60 mm according to different design requirements in exchange for the secondary heat dissipation area and secondary heat dissipation ratio required by the design.

[0070] The left and right sides of the A and B type grate face beams (1) are respectively provided with transverse side strip tenons (13) with a width of 6 to 10 mm, a transverse spacing between the adjacent transverse side strip tenon grooves of 2 to 4 mm, an upper and lower vertical spacing between the transverse side strip tenon slope surface and the inclined top slope surface of the adjacent transverse side strip tenon grooves of 2 to 5 mm, and an inclination angle of the transverse side strip tenon slope surface of greater than 19°.

[0071] The centers of the connecting holes of the support rods of the A and B type grate plates with different apertures are the same coordinate point, and the diameters of the connecting holes of the support rods of the A and B type grate plates are 2 to 4 mm larger than the diameters of the support rods.

[0072] The center depth of the arc grooves (2.1) and (2.2) provided on the grate surface of the travel section (2) of the A and B type grate pieces is 1 to 4 mm, and the length of the groove is greater than the diameter of the arc foot of the lower thrust section.

[0073] The arc grooves of the A and B type grate plates are located at the front and rear sides of the longitudinal 1 / 2 center line of the travel section. The longitudinal spacing between the center lines of the two arc grooves can be 40 to 80 mm according to different travel section lengths.

[0074] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model are included in the protection scope of the utility model.

Claims

1. A reciprocating grate device, characterized in that: The A-type grate slices and the B-type grate slices are paired with each other, arranged at intervals on the left and right, and connected horizontally into a group through a connecting device. The combined module can prevent the broken pieces of the grate slices from being separated and clamped after being damaged. The A-type grate plate and the B-type grate plate both include a surface beam, reinforcing ribs and heat dissipation ribs, the reinforcing ribs are vertically connected to the surface beam, and the heat dissipation ribs are distributed on both sides of the reinforcing ribs and vertically connected to the reinforcing ribs.

2. The reciprocating grate device according to claim 1, characterized in that: The plurality of heat dissipation ribs are parallel to each other.

3. The reciprocating grate device according to claim 2, characterized in that: The heat dissipation ribs include a first heat dissipation rib group and a second heat dissipation rib group. The first heat dissipation rib group is arranged on one side of the reinforcing ribs, and the second heat dissipation rib group is arranged on the other side of the reinforcing ribs. The projection axes of the first heat dissipation rib group and the second heat dissipation rib group on the reinforcing ribs do not overlap and are alternately and evenly distributed.

4. The reciprocating grate device according to claim 1, characterized in that: The front ends of the A-type grate slices and the B-type grate slices are provided with side blocks.

5. The reciprocating grate device according to claim 4, characterized in that: The connecting device includes a tension rod and a limit pin. Both the A-type grate plate and the B-type grate plate are provided with connecting holes. The tension rod passes through the connecting holes to connect several A-type grate plates and B-type grate plates. One end of the tension rod has an end cap, and the end of the other end is provided with a limit hole. The limit pin passes through the limit hole.

6. The reciprocating grate device according to claim 5, characterized in that: The diameter of the connecting hole is 2 to 4 mm larger than the diameter of the tension rod.

7. The reciprocating grate device according to claim 5, characterized in that: The connecting holes include a first connecting hole and a second connecting hole, the first connecting hole is at the front end of the A-type grate plate and the B-type grate plate, the second connecting hole is at the rear end of the A-type grate plate and the B-type grate plate, and the height of the center line of the first connecting hole is lower than the height of the center line of the second connecting hole.

8. The reciprocating grate device according to claim 1, characterized in that: The A-type grate plate and the B-type grate plate are both provided with transverse side strip tenons and transverse side strip grooves connected to the surface beams. The transverse side strip tenons are located on one side of the reinforcing ribs, protrude toward the side away from the reinforcing ribs, and have a trapezoidal shape with the inclined surface facing upward; the transverse side strip grooves are located on the other side of the reinforcing ribs, and are concave toward one side of the reinforcing ribs.

9. The reciprocating grate device according to claim 8, characterized in that: The bottom of the transverse side strip tenon is parallel to the surface beam, the top of the transverse side strip tenon is an inclined plane, the inclination angle of the inclined plane is greater than 19°, and the inclination angle of the bottom of the transverse side strip slot is less than or equal to 19°.

10. The reciprocating grate device according to claim 9, characterized in that: The first heat dissipation rib group on the A-type grate slice is staggered with the second heat dissipation rib group on the adjacent B-type grate slice, and the second heat dissipation rib group on the A-type grate slice is staggered with the first heat dissipation rib group on the adjacent B-type grate slice.

11. The reciprocating grate device according to claim 1, characterized in that: The surface beams of the A-type grate slice and the B-type grate slice include a travel section and a thrust section, and arc grooves are arranged on the travel sections of the surface beams of the A-type grate slice and the B-type grate slice.

12. The reciprocating grate device according to claim 11, characterized in that: The arc grooves on the A-type grate plate and the arc grooves on the adjacent B-type grate plate are arranged in a longitudinal front-to-back staggered arrangement with the center line of the stroke section as the boundary.

13. The reciprocating grate device according to claim 12, characterized in that: The thrust section has an arc-shaped foot, and the arc-shaped groove cooperates with the arc-shaped foot of the thrust section, so that the A-type grate sheet and the B-type grate sheet respectively perform up and down alternating undulating movements.

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