CN117053214A - Combined type fire grate for garbage incineration with guiding and lifting limiting mechanism - Google Patents

Abstract

The invention relates to a fire grate for garbage incineration, in particular to a composite fire grate for garbage incineration with a guiding and lifting limiting mechanism, which combines forward pushing movement and reverse pushing movement, adopts different running dip angles and strokes, is provided with a turnover drop between two sections, is provided with fins at the head part of a forward pushing fire grate sheet, is provided with a dislocation boss at the head part of a reverse pushing fire grate sheet, adopts a horizontal strip-shaped conical air hole at the head part of the fire grate sheet, and is combined to form the composite mechanical fire grate for garbage incineration, has stronger garbage conveying and loosening functions, is particularly suitable for small towns and villages with complicated components, heavier water and low heat value, and is also provided with a guiding mechanism and lifting limiting mechanism, so that the running of the fire grate is guided and limited, and the stable running of the fire grate is effectively realized.

Description

Combined type fire grate for garbage incineration with guiding and lifting limiting mechanism

Technical Field

The invention relates to a fire grate for garbage incineration, in particular to a composite fire grate for garbage incineration with a guiding and lifting limiting mechanism.

Background

With the rapid development of national economy and the acceleration of urban process, the living standard of people is increasingly improved, the generation amount of urban household garbage is increasingly larger, the defects of garbage landfill treatment modes and the generated contradiction are increasingly exposed, and the incineration treatment is gradually a main garbage treatment mode as the incineration treatment can get rid of the dependence on a large amount of land resources and can meet the dual requirements of environmental protection and resource utilization. In recent years, the waste incineration industry of China has entered a high-speed development period under the encouragement of national industrial policies for reduction, harmless and recycling of living waste. Garbage incineration plants are successively newly built in various large and medium cities, and the garbage is subjected to harmless treatment and resource utilization at higher and higher levels. Harmless treatment of county small towns and village garbage becomes a hotspot of industry. The garbage in small towns and villages in county and small regions of China has low heat value, high moisture, heavy ash and large seasonal change, is unfavorable for stable combustion and has higher technical requirements on equipment for incineration treatment. The prior garbage incineration technical equipment applied in China mainly comes from developed European and American countries, the development foundation is garbage with high heat value based on the developed countries, so that the original introduction technology has the problem of garbage adaptability aiming at domestic application, and innovation and development are needed.

In the existing incineration process and equipment, the fire grate for garbage incineration has various forms, and the application of the fire grate for garbage incineration accounts for more than 80% of the total amount of the world garbage incineration market. The reverse pushing fire grate is adopted in the furnace body, under the action of inclination and reverse pushing, the garbage at the bottom layer of the material layer ascends, the garbage at the upper layer descends, and the garbage is continuously turned over and stirred and fully contacted with air, so that the complete combustion of the garbage is realized. Meanwhile, the residence time of the garbage in the furnace can be correspondingly prolonged by reverse pushing, so that the area of the fire grate can be smaller than that of the forward pushing fire grate under the condition of the same treatment capacity. The problems are: firstly, for the characteristics of high water content, complex components and the like of domestic garbage in China, the conveying capability of the reverse pushing grate for the garbage is weak, particularly, the bottom garbage in a material layer in a drying stage is easy to agglomerate or block, and is stuck on the surface of the grate to stop moving or move very slowly, and the garbage is continuously conveyed forwards only along with the gradual decrease of the water content in the drying process; secondly, the bottom layer garbage in the drying stage is locally stuck to the fire grate surface, so that primary air holes on the fire grate are blocked, the air supply effect is influenced, the drying effect is greatly influenced, the drying time is prolonged, the ignition combustion of the garbage is delayed, the residence time of the garbage in the whole furnace is prolonged, and the burning process in the furnace is directly influenced; thirdly, as the pusher is continuously fed into the furnace, the upper layer garbage is extruded and conveyed forwards in the drying stage, and the bottom layer garbage is conveyed relatively slowly, so that the difference of the movement speeds of the upper layer garbage and the bottom layer garbage is large.

In addition, the incinerator with forward grate is also adopted in the incinerator body, under the action of inclination and forward pushing, the whole material layer garbage descends, the grate moves in the same direction with the material layer, the garbage is loosened and turned over by utilizing the fall between the front grate and the rear grate or the grate stroke, and the garbage conveyed forwards is fully contacted with air, so that the complete combustion of the garbage is realized. The problems are: firstly, in order to ensure the stay time of the garbage in the incinerator, the area of the grate is designed to be larger, or the stroke of the grate is designed to be larger, so that the height or length of the incinerator is increased, and the cost is increased; secondly, the movement direction of the fire grate is the same as that of the garbage material layer, when the garbage material layer is higher, the relative drop of the adjacent fire grate is lower or the relative stroke is smaller, the garbage in operation is almost in a relatively static state, the stirring and mixing effects are poor, the garbage is insufficiently dried, can not be fully combusted, the combustion efficiency is low, and the index of the ash burning rate is difficult to reach. Thirdly, percolate in the garbage layer can be pushed by the fire grate to flow forwards before evaporation, so that the drying time of garbage is increased, the percolate is not collected in time, and the percolate is evaporated into water vapor in the furnace, so that the moisture content in the flue gas is improved, and the incineration process is influenced; the garbage delays ignition combustion, so that the residence time of the garbage in the whole furnace is increased, and the influence on the incineration process is great. Fourthly, the incineration process carries out a periodic intermittent control mode on the movement control of the fire grate, namely the fire grate stops after a certain time of movement and then moves, so that for domestic garbage with the characteristics of high water content, complex components and the like in China, the time change of the stop and the movement is larger, the adjustment of process parameters is more frequent, the incineration process parameters of different areas using the incinerator are required to be adjusted, and the control is correspondingly adjusted. Fifthly, the periodic intermittent control mode ensures that the time of the fire grate part is stationary, the fire grate is easily burnt at the position with the lower time of the overlong material layer, the drying at the position with the higher material layer is insufficient, the fire is difficult to burn out, the residence time in the furnace cannot be ensured due to the excessively short stopping time, and the low combustion efficiency can cause the index of difficult achievement of the burning rate of ash. Sixthly, if the garbage incinerator grate is excessively segmented, the complexity of the mechanism is increased, the failure efficiency is higher, the cost is higher, and higher requirements are put forward on the algorithm of the control system;

In addition, a two-stage grate incinerator is adopted in the furnace body, and the front section close to the feed hopper is a downward inclined reverse pushing grate; the rear section close to the slag remover is a forward pushing fire grate. And in the inclined reverse pushing drying and burning stage, the horizontal forward pushing burning stage adopts the height difference between the two stages, so that the garbage of the garbage material layer is loosened and turned over, and the garbage conveyed forward is fully contacted with air, so that the complete burning of the garbage is realized. The problems are: firstly, for the characteristics of high water content, complex components and the like of domestic garbage in China, the conveying capacity of the reverse pushing grate for the garbage is weaker, and the problem of the full reverse pushing grate exists in the garbage drying stage; secondly, in the forward pushing type ashes burning stage, garbage is basically burnt to become ashes, most of the ashes are ashes with small size, and with the progress of the ashes burning stage, the content of the ashes is increased, so that the index of the hot burning rate of the ashes is reached, namely, the water smoothly pushes the ashes with small size to be conveyed by the grate movement, and the ashes are easy to enter a primary air chamber below through a grate gap or a primary air hole, so that the ash output of the air chamber is large, and the centralized collection and treatment of the ashes are not facilitated; thirdly, dust enters the moving mechanism part in the primary air chamber, so that the abrasion of the kinematic pair is large, the normal operation of the mechanism is influenced, dust collection is formed on the fixed plate or the fixed beam, the penetrating material layer of the primary air is influenced to enter the furnace, and the garbage combustion and the burning-out are assisted.

In summary, aiming at the treatment characteristics of the garbage in small towns and villages in county and county of China, technical equipment for treating the garbage with better adaptability and stronger pertinence is needed, and typical reciprocating grate for garbage incineration has the advantages of the reciprocating grate, but the problems and the defects which need to be solved in the practical application of the garbage in small towns and villages in county and county of China are solved:

1. for the characteristics of high water content, complex components and the like of domestic garbage in China, the conveying capability of the reverse pushing grate to the garbage, particularly the garbage layer in the drying stage, is easy to agglomerate or block, is stuck on the surface of the grate, and influences the drying process and the conveying of the garbage;

2. the bottom layer garbage in the drying stage of the reverse pushing grate is locally stuck to the surface of the grate, so that primary air holes on the grate are blocked, the drying time is prolonged, the residence time of the garbage in the whole furnace is prolonged, and the burning process in the furnace is directly influenced;

3. because the pusher is continuously fed into the furnace, the upper layer garbage is extruded and conveyed forwards in the drying stage, and the bottom layer garbage is conveyed relatively slowly, so that the difference of the movement speeds of the upper layer garbage and the bottom layer garbage is larger;

4. in order to ensure the residence time of the garbage in the incinerator, the area design of the forward pushing grate is larger, or the stroke design of the grate is larger, the height or length of the incinerator is increased, and the cost is increased;

5. When the moving direction of the forward pushing grate and the moving direction of the garbage material layer are the same, and when the garbage material layer is higher, the relative drop of the adjacent grate is lower or the relative stroke is smaller, the garbage in operation is almost in a relatively static state, the stirring and mixing effects are poor, the garbage is insufficiently dried, can not be fully combusted, the combustion efficiency is low, and the index of the ash burning rate is difficult to reach;

6. the percolate in the garbage layer can be pushed by the pushing grate to flow forward before evaporation, so that the drying time of garbage is increased, the percolate is not collected in time, the residence time of the garbage in the whole furnace is increased, all the percolate is evaporated into water vapor in the furnace, the moisture content in the flue gas is increased, and the incineration process is influenced;

7. the forward grate motion control implements a periodic intermittent control mode, so that the time variation of the stopping and motion is relatively large, the process parameter adjustment is relatively frequent, the incineration process parameters of the incinerator used in different areas are required to be adjusted, and the control is correspondingly adjusted for domestic garbage with high water content, complex components and the like.

8. The periodic intermittent control mode ensures that the time of the fire grate part is stationary, the fire grate is easily burnt at the position with the lower time of the overlong material layer, the drying at the position with the higher material layer is insufficient, the fire is difficult to burn out, the residence time in the furnace cannot be ensured due to the excessively short stopping time, and the combustion efficiency is low, so that the index of the burning rate of ash is difficult to reach.

9. If the garbage incinerator grate is too many in sections, the complexity of the mechanism is increased, the failure high rate is higher, the cost is higher, and higher requirements are put forward on the algorithm of the control system;

10. the ash burning stage of forward pushing type, the rubbish is basically burnt into ash, a great part is ash with small size, and with the progress of the ash burning stage, the ash content is increased, the index of the ash burning rate is reached, namely the ash with small size is conveyed by the smooth pushing of the water and the movement of the fire grate, and the ash is easily fed into the primary air chamber below through the gap of the fire grate or the primary air hole, so that the ash output of the air chamber is large, and the centralized collection treatment of the ash is not facilitated; dust enters the moving mechanism part in the primary air chamber, so that the abrasion of the kinematic pair is larger, the normal operation of the mechanism is influenced, dust collection is formed on the fixed plate or the fixed beam, the penetrating material layer of the primary air is influenced, and the dust enters the furnace to assist the garbage to burn and burn out.

The application provides a fire grate for waste incineration based on comprehensive characteristics and adverse factors of low heat value, high moisture, heavy ash content and large seasonal change of waste in small towns and villages in county and regions, and meets the requirements of harmless treatment of the waste in the small towns and villages in county and regions.

Disclosure of Invention

In view of the above, the invention aims to provide the composite type garbage incineration grate with the guiding and lifting limiting mechanisms, which is suitable for comprehensive characteristics and adverse factors of low heat value, high moisture, heavy ash and large seasonal change of garbage in small towns and villages in county and county, and further meets the requirements of harmless treatment of the garbage in small towns and villages in county and county.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the utility model provides a combined type garbage incineration fire grate with direction and limit elevating system, including two longitudinal frame, horizontal frame, fixed fire grate piece, movable cross beam and the movable fire grate piece of arranging each other in parallel, install on the horizontal frame between the longitudinal frame connect the draw-in groove of same row of fixed fire grate piece afterbody, in order to form fixed fire grate plate, the draw-in groove of same row of movable fire grate piece afterbody is connected to the movable cross beam, in order to form movable fire grate plate, movable fire grate plate and fixed fire grate plate overlap around, and the interval arrangement gathers into the fire grate, and all set up the wind hole in the head of movable fire grate plate and fixed fire grate plate, its key lies in, the fire grate is from top to bottom to two sections, and the one section of top is the fire grate that pushes forward, and one section of below is the fire grate that pushes forward, fire grate piece head on the fire grate that pushes forward all is towards fire grate low point direction, and the movable cross beam of same section all is equipped with left and right side by side drive beam that support, left and right drive beam by left and right drive beam, the frame and drive beam connection make into end to drive mechanism;

The bottom of the driving beam is provided with an operation frame which is in sliding connection with the supporting roller, the longitudinal section of the operation frame is triangular, one side of the triangle is in contact with the supporting roller, one side of the operation frame in contact with the supporting roller in the forward pushing grate is inclined upwards by 10-20 degrees towards the horizontal direction of the reverse pushing grate so as to limit the operation direction of the driving beam in the forward pushing grate, the driving beam in the forward pushing grate is inclined downwards by 5-15 degrees towards the horizontal direction of the reverse pushing grate, and the included angle between one side of the operation frame in contact with the supporting roller and the driving beam is 15-35 degrees;

the outer side of the driving beam is provided with a guide plate corresponding to the running direction of the driving beam, the transverse frame is provided with guide wheels matched with the guide plate to form a guide mechanism, and a lifting limiting mechanism is arranged between the movable cross beam and the longitudinal frame to limit the fire grate through the movable cross beam.

Further, ash hoppers are arranged below the forward pushing grate and the reverse pushing grate, the ash hoppers, the longitudinal frames and the transverse frames form cavities isolated from the outside to serve as air chambers, and the cavities are horn-shaped with large upper parts and small lower parts.

Further, in the forward pushing grate, two ends of the driving beams arranged in parallel left and right are respectively provided with a driving cross beam connected between the driving beams, a transmission mechanism of the forward pushing grate is connected with a driving frame through the driving cross beams, and a transmission mechanism of the reverse pushing grate is connected with the driving frame through the driving beams in the reverse pushing grate;

The transmission mechanism of the forward pushing fire grate and the backward pushing fire grate are arranged below a feeding platform at one end of the fire grate, wherein the transmission mechanism of the forward pushing fire grate comprises a first driving device and a first driving pull rod with one end connected to the first driving device, the other end of the first driving pull rod is connected with a driving cross beam, the transmission mechanism of the backward pushing fire grate comprises a second driving device, an inner arm with one end connected to the second driving device, a rotary drum, an outer arm and a second driving pull rod, the other end of the inner arm is connected to the middle part of the rotary drum, two ends of the rotary drum are connected to the middle parts of two outer arms arranged side by side, one end of the outer arm is connected to a supporting frame below the feeding platform, the other end of the outer arm is hinged to the second driving pull rod, and the two second driving pull rods are respectively connected to the end parts of the driving beams arranged side by side left and right in the backward pushing fire grate.

Further, limit mechanism includes support, gyro wheel and spacing box, the tip at the movable cross beam of one end fixed connection of support, the gyro wheel is connected to the other end, spacing box includes fixed connection spacing on the vertical frame and the limiting plate of installing the below at spacing top, gyro wheel and limiting plate roll connection to carry out spacingly to the grate through the movable cross beam.

Further, the head part of each fire grate segment of the forward pushing fire grate is provided with a triangular fin; the head parts of all the fire grate segments of the reverse pushing fire grate are provided with bosses, and the bosses of the head parts of all the fire grate segments of the reverse pushing fire grate are arranged in a staggered manner so that the fire grate plates of the same row form a staggered tooth-shaped structure which is transversely arranged.

Further, the longitudinal frame is connected with the transverse frame to form a fire grate frame, the fire grate frame is placed on the inclined longitudinal beam through the bottom surface of the longitudinal frame, a fixed block is arranged at the bottom of one end, far away from the fire grate low point, of the longitudinal frame, and the fixed block is clamped in a clamping groove arranged on one end, far away from the fire grate low point, of the inclined longitudinal beam, so that the fire grate frame is freely hung on the inclined longitudinal beam.

Further, the height difference between the forward pushing grate and the reverse pushing grate is 600-900 mm, and the tail end of the forward pushing grate is connected with the reverse pushing grate through a fireproof transition platform or a middle grate.

Further, the tail end of the fire grate is provided with a material layer adjusting device, the material layer adjusting device comprises a rotating shaft, a shaking plate and a rocker arm, the rotating shaft is rotationally connected to the longitudinal frame, one end of the rotating shaft penetrates through the longitudinal frame, the rocker arm is connected to one end of the rotating shaft, the shaking plate is connected with the rotating shaft into a whole, and the shaking plate and the rotating shaft rotate under the driving of the rocker arm to adjust the vertical height of the shaking plate, so that the height of a garbage layer on the fire grate can be adjusted in real time.

Further, one side of the running frame in the reverse pushing grate, which is in contact with the supporting roller, is inclined upwards towards the forward pushing grate horizontally by 35-45 degrees to limit the running direction of the driving beam in the reverse pushing grate, the driving beam in the reverse pushing grate is inclined upwards towards the forward pushing grate horizontally by 20-30 degrees, and the included angle between the one side of the running frame in the reverse pushing grate, which is in contact with the supporting roller, and the driving beam is 15-25 degrees.

Further, the stroke of the driving beam in the forward pushing grate is 200-400 mm, and the stroke of the driving beam in the reverse pushing grate is 300-500 mm.

The invention has the beneficial effects that:

1. the composite type garbage incineration grate with the guiding and lifting limiting mechanism provided by the invention has the advantages that through the combination of the forward pushing movement and the reverse pushing movement of the grate sheets, the forward pushing grate and the reverse pushing grate adopt different operation dip angles and travel settings, and the relation between the installation angle of the driving beam (namely the whole dip angle of the grate sheets) and the operation angle of the driving beam is limited, so that the garbage material is well transferred and turned, the effective turning and the transfer of the garbage material are ensured, the turning fall is arranged between the forward pushing grate and the reverse pushing grate, the fins are arranged at the head of the forward pushing grate sheets, and the head of the reverse pushing grate sheets is provided with the dislocation boss, so that the composite type garbage incineration grate structure is formed by combination, has the advantages of strong garbage conveying and stirring loosening functions, is particularly suitable for garbage with complex components, heavy moisture and low heat value, is well adapted to the comprehensive characteristics and adverse factors of small town and country garbage heat value, high moisture content, heavy ash content and large seasonal variation, and further meets the requirements of harmless treatment of small town and country garbage in county.

2. The combined type garbage incineration grate with the guiding and lifting limiting mechanisms has the advantages that the transmission structure is simple, the combined structure of the rocker arm, the connecting rod, the driving beam and the movable cross beam is adopted, forward pushing movement and reverse pushing movement of the grate segments are respectively realized under the driving of the hydraulic cylinder, meanwhile, the driving guiding mechanism and the lifting limiting mechanism are arranged to guide and limit the grate up and down, the grate segment running track is prevented from deviating, the functionality is strong, the running is reliable, and the stable running of the grate is effectively realized. And secondly, the hydraulic rocker arm mechanisms of the fire grate transmission structure are arranged below the feeding platform at the front end of the fire grate, so that the operation and maintenance in the later stage are more convenient.

3. The fire grate frame of the composite type fire grate for the garbage incineration with the guiding and lifting limiting mechanism is hung on the inclined steel beam below by adopting the inclined front end, the scheme is simple and reliable, the installation is convenient and fast, and the problem of thermal expansion in the operation of the fire grate frame is well solved. And secondly, the grate adopts a modular design in a row unit, has few types of grate segments and strong interchangeability, is convenient for realizing the application of various types of products with various processing capacities, and has convenient maintenance and low cost.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of a composite fire grate for refuse incineration with guiding and lifting limiting mechanisms according to the present invention;

FIG. 2 is a schematic view of a push grate;

FIG. 3 is a schematic view of the transverse structure of a push-down grate;

FIG. 4 is a schematic view of the structure of a reverse push grate;

FIG. 5 is a schematic view of the transverse structure of a push-back grate;

FIG. 6 is a schematic view of the structure of the transmission mechanism in the reverse push grate;

FIG. 7 is a schematic view of a rocker arm;

FIG. 8 is a first schematic view of a guide mechanism;

FIG. 9 is a second schematic view of the guide mechanism;

FIG. 10 is a schematic view of a lifting mechanism;

fig. 11 is a schematic view of a structure in which a grate frame is connected to an oblique longitudinal beam.

Reference numerals: the fire grate comprises a forward pushing fire grate 1, a reverse pushing fire grate 2, a transmission mechanism 3, a longitudinal frame 4, a transverse frame 5, a movable cross beam 6, a fire grate sheet 7, a hydraulic cylinder 8, a hydraulic cylinder support 801, a rocker arm 9, a rocker arm support 901, a driving pull rod 10, a driving beam 11, a supporting idler roller 12, a guide mechanism 13, a lifting limiting mechanism 14, a support 1401, a roller 1402, a supporting box 1403, a limiting plate 1404, a running frame 15, a guide plate 16, a guide wheel 17, a sealing box 18, a fin 19, a wind hole 20, a fixing frame support 21, an arc-shaped scraping blade 22, a side wall casting 23, a rotary drum 24, an outer arm 25, an inner arm 26, a material layer adjusting device 27, a rotary shaft 2701, a rocking sheet 2702, a fixing block 28, a sealing shell 29, a driving cross beam 30, an oblique longitudinal beam 31, a clamping groove 3101, a feeding platform 32, a supporting frame 33, an ash bucket 34 and an oblique support 35.

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 to 11, the fire grate for composite garbage incineration with guiding and lifting limiting mechanisms is two sections, and comprises a forward fire grate 1 and a reverse fire grate 2, wherein the two sections of fire grates are connected front and back and are provided with a certain height drop, the two sections of fire grates are respectively provided with a transmission mechanism 3, two longitudinal frames 4 which are arranged in parallel, a plurality of transverse frames 5, a movable cross beam 6 and fire grate pieces 7, the fire grate pieces comprise fixed fire grate pieces and movable fire grate pieces, clamping grooves at the tail parts of the same row of fixed fire grate pieces are connected on the transverse frames 5 which are arranged between the two longitudinal frames 4 so as to form a fixed fire grate plate, the movable cross beam 6 is connected with clamping grooves at the tail parts of the same row of movable fire grate pieces so as to form a movable fire grate plate, the movable fire grate plate and the fixed fire grate plate are overlapped front and back, the two sections are alternately arranged so as to form the fire grates, the heads of the fire grate pieces 7 on the forward fire grate 1 face the direction of the low points, the heads of the fire grate pieces 7 on the reverse fire grate plates face the direction of the fire grate plates, the left and right side and the fire grate plates are respectively arranged in the direction of the heads of the fixed fire grate plates, the left and the right side frames and the left side frames and the right side frames are respectively, the fire grate plates are respectively connected with the left side frames 11 and the right side frames and the fire grate plates are respectively, and the left side frames and the fire grate frames are respectively, and the left side frames and the fire grate frames and the right frames are respectively and the front and the fire frames are arranged.

In the forward pushing grate 1, two ends of the driving beams 11 arranged side by side left and right are respectively provided with a driving cross beam 30 connected between the driving beams 11, the transmission mechanism 3 of the forward pushing grate 1 is connected with a driving frame through the driving cross beams 30, and in the backward pushing grate, the transmission mechanism of the backward pushing grate 2 is connected with the driving frame through the driving beams 11; the transmission mechanisms of the forward pushing grate 1 and the reverse pushing grate 2 are arranged below a feeding platform 32 at one end of the grate, wherein the transmission mechanism 3 of the forward pushing grate 1 comprises a first driving device and a first driving pull rod with one end connected to the first driving device, the other end of the first driving pull rod is connected with a driving cross beam 30, the transmission mechanism 3 of the reverse pushing grate 2 comprises a second driving device, an inner arm 26 with one end connected to the second driving device, a rotary drum 24, an outer arm 25 and a second driving pull rod, the other end of the inner arm 26 is connected to the middle part of the rotary drum 24, two ends of the rotary drum 24 are connected to the middle parts of two outer arms 25 arranged side by side, one end of the outer arm 25 is connected to a supporting frame 33 below the feeding platform, the other end of the outer arm 25 is hinged to the second driving pull rod, and the two second driving pull rods are respectively connected with the end parts of the driving beams 11 arranged side by side left and right in the reverse pushing grate 2.

Specifically, the transmission mechanisms 3 of the two sections of fire grates are all driven by hydraulic pressure and comprise hydraulic cylinders 8 and driving pull rods 10, the hydraulic cylinders 8 are arranged below a feeding platform 32 positioned at the front end of the fire grate, namely, the first driving device and the second driving device are all hydraulic cylinders 8, the transmission mechanism of the reverse pushing fire grate 2 also comprises rocker arms 9, each rocker arm 9 comprises an inner arm 26, a rotary drum 24 and an outer arm 25, and the hydraulic cylinders 8 are hinged with a hydraulic cylinder support 801 fixedly connected to a supporting frame 33; in the transmission mechanism of the forward pushing grate 1, a hydraulic cylinder 8 is hinged with a driving pull rod 10, and the driving pull rod 10 is fixedly connected with a driving cross beam 30; in the transmission mechanism of the reverse pushing fire grate 2, the hydraulic cylinder 8 is hinged with the inner arm 26, the outer arm 25 is hinged with the driving pull rod 10, the driving pull rod 10 is hinged with the driving beam 11, and the other end of the outer arm 5 is hinged with the rocker arm support fixedly connected to the support frame 33, so that the phenomenon that the transmission mechanism 3 is locked in movement is avoided.

The following description is made of the structure of the forward pushing grate 1, the forward pushing grate 1 is an upper grate, the running direction of the grate segments 7 in the forward pushing grate 1 is consistent with the downward moving direction of the garbage materials, two driving cross beams 30 are connected between the longitudinal rectangular sections of the two groups of driving beams 11 through bolts in front-back, a hydraulic cylinder 8 is directly hinged with the front end of a steel pipe type driving pull rod 10 through a pin shaft, and the rear end of the driving pull rod 10 is fixedly connected with the middle part of the driving cross beam 30 at the front end of the driving beam 11; the driving beam 11 is obliquely downwards arranged at an inclination angle of 10 degrees towards the downwards moving direction of the garbage materials, a group of triangular running frames 15 are respectively arranged at the front and rear parts of the bottom of the driving beam 11, the bottom plate of each running frame 15 is obliquely upwards arranged at an inclination angle of 15 degrees towards the downwards moving direction of the garbage materials, and a supporting carrier roller 12 is arranged below the bottom plate of each running frame 15, so that the running directions of the driving beam 11 and the movable grate plates in the forward pushing grate 1 are controlled. Under the action of the hydraulic cylinder 8, the driving pull rod 10 drives the driving beam 11 to do reciprocating forward pushing motion on the supporting idler 12, and the movable fire grate segments are driven to do reciprocating forward pushing motion by driving the movable cross beams 6 connected with the driving beam 11.

In the forward pushing grate, a plurality of transverse frames 5 are arranged at intervals along the longitudinal direction of the grate, and two sides of each transverse frame 5 are connected to the longitudinal frames 4. The transverse frame 5 is composed of a panel and a rib plate, wherein the panel is vertically connected between the two side longitudinal frames 4, the rib plate is used as a reinforcing rib of the panel, and holes are formed in corresponding positions of the panel to meet the operation of the driving pull rod 10, the driving beam 11 and the operation frame 15. Support idlers 12 below the drive beams 11 are mounted on the face plate of the transverse frame 5. The special structure of bending plates with certain angles and round steel bars is arranged on the upper part of the transverse frame 5 and is used for clamping groove type installation and fixing of the fire grate segments, so that the quick installation of the fire grate segments can be ensured, and the up-and-down swing and automatic position recovery of the fire grate segments can be met.

The driving beam 11 is provided with a supporting idler 12 under the bottom plate of each moving frame 15, the supporting idler 12 consists of a roller and a left supporting seat and a right supporting seat, a bearing and a pin shaft are arranged in the roller, the supporting seats are arranged on the panel of the transverse frame 5, and the roller is rotationally connected between the supporting seats. The driving beam 11 is carried on the roller by the bottom plate of the moving frame 15 and is driven by the transmission mechanism to realize reciprocating motion on the roller.

Guide plates 16 made of alloy wear-resistant materials are symmetrically arranged in front of and behind the outer sides of the driving beams 11 arranged side by side left and right, the angle of the guide plates 16 is consistent with the running angle of the driving beams 11, and the guide plates are arranged in an upward inclined mode by 15 degrees. The guide mechanism 13 is symmetrically arranged on the panel of the transverse frame 5 at the outer side of the guide plate 16, the guide mechanism 13 consists of an oblique support 35, a pin shaft and guide wheels 17, the oblique support 35 is arranged on the transverse frame 5, the guide wheels 17 and the corresponding guide plates 16 are arranged in a small gap with the same inclination angle, and the guide wheels 17 at the two sides play a left-right guiding role in the operation of the driving beam 11.

A sealing box 18 is arranged on the first transverse frame 5, the driving pull rod 10 connected with the hydraulic cylinder 8 passes through the sealing box 18 and is connected with the driving cross beam 30, and the sealing box 18 can ensure the internal and external isolation of the fire grate frame in the reciprocating operation of the driving pull rod 10. A plurality of movable cross beams 6 are arranged on the driving beam 11 at intervals along the longitudinal direction, and the movable cross beams 6 are alternately arranged with the transverse frames 5. The movable cross beam 6 consists of channel steel, inclined plates and rib plates, wherein round steel bars are arranged on one side of the top of each inclined plate and used for clamping the movable fire grate segments, the clamping grooves are rapid and convenient to install, the reciprocating motion of the fire grate segments can be driven, and the up-and-down swing and automatic position recovery of the fire grate segments can be met. The angle of the inclined plate is consistent with the angle of the bending plate at the upper part of the transverse frame 5, the angle is perpendicular to the bottom plate of the running frame 15, and the running direction of the fire grate segments 7 is perpendicular to the inclined plate and the bending plate, so that the installation direction of the fire grate segments is consistent with the running square of the driving beam 11, namely, the running of the driving beam 11 is consistent with the running direction of the fire grate segments 7.

The fire grate segments 7 of the forward pushing fire grate 1 are arranged at the round steel bars above the movable cross beam 6 and the transverse frame 5 respectively through tail clamping grooves in a row unit with the heads facing forwards. The fire grate segment 7 is long, the side surface and the back surface are processing planes, the triangular fins 19 are arranged above the head, the cutting effect can be realized, the boss is arranged below the head of the fire grate segment 7, the horizontal strip-shaped conical air hole 20 is arranged on the front inclined surface of the head, and the air port 20 is conical with small outside and large inside. The same row of transversely adjacent fire grate segments 7 are tightly contacted and connected by bolts, the movable fire grate plates are directly lapped on the back surface of the front row of fixed fire grate segments through bosses below the heads, the fixed fire grate plates are directly lapped on the back surface of the front row of movable fire grate segments through bosses below the heads, the back surface and the running angle of the fire grate segments are the same as the running angle of the driving beam, the upward inclination angle is 15 degrees, the head of the first row of movable fire grate segments is lapped on a fixed frame supporting plate 21 with the same front end and 15 degrees, the back surface of the last row of movable fire grate segments is provided with an arc-shaped scraping blade 22 with a compacting function, the arc-shaped scraping blade 22 is arranged at the top of the first transverse frame 5, and the compacting function on the front row of fire grate segments is realized through springs. The movable grate plate is driven by the tail movable cross beam 6 to do reciprocating forward pushing movement on the back surface of the front row of fixed grate plates. The upper fire grate is provided with four rows of movable fire grate plates and 3 rows of fixed fire grate plates, the whole fire grate plate is inclined downwards by 10 degrees, the arrangement direction of the fire grate plate is the same as that of the driving beam 11, the running angle is 15 degrees upwards, and the travel is 300mm.

The left end and the right end of the movable cross beam 6 at the front end and the rear end of the driving beam 11 are provided with a limited lifting mechanism 14, the limited lifting mechanism 14 consists of a support 1401, a roller 1402 and a limit box, the roller 1402 is supported in a unidirectional manner by the support 1401, the support 1401 is reversely arranged below the end of the movable cross beam 6, the limit box consists of a limit frame 1403 and a limit plate 1404, the limit frame 1403 is arranged at a position corresponding to a longitudinal frame 4 at the outer side of the end of the movable cross beam 6, the limit plate 1404 is arranged below the top of the limit frame 1003, the angle of the limit plate 1404 is consistent with the running direction of the driving beam 11, the roller 1402 of the limited lifting mechanism in running runs under the limit plate 1404, the upper limit and the lower limit of the movable cross beam 6 and the driving beam 11 are realized by limiting the running track of the roller 1402, and the deviation of the running track of fire grate pieces is prevented. Preferably, stop plates perpendicular to the stop plates 1404 are provided at both ends of the stop frame 1403 to limit the overrun of the roller 1402, thereby preventing the overrun of the driving beam 11.

The longitudinal frame 4 is of a rectangular section box body structure, the upper end face, the lower end face, the front end face and the rear end face are channel steel which are oppositely arranged, the inner side of the longitudinal frame 4 is a metal panel, and a plurality of reinforcing rib plates are discontinuously arranged on the outer side of the longitudinal frame. The lower ends of the metal panels at the inner sides of the longitudinal frames 4 are bent, the bent ends at the lower parts of the inner side panels of the left and right longitudinal frames 4 and the lower ends of the corresponding transverse frames 5 form rectangular openings, and the rectangular openings are connected with the upper interfaces of the lower ash bucket 34 of the fire grate and can effectively collect slag leakage in the running process of the fire grate. The side wall castings 23 are connected and installed in a bolt mode in the corresponding area of the running track of the upper grate of the metal panel on the inner side of the longitudinal frame 4, and the longitudinal frame 4 is prevented from being worn in running. The longitudinal frame 4, the transverse frame 5 and the ash bucket below form a cavity isolated from the outside, the ash bucket, the longitudinal frame and the transverse frame form a cavity isolated from the outside to serve as an air chamber, the cavity is in a horn shape with a big upper part and a small lower part, and combustion air entering the cavity through a pipeline is blown into a hearth through a fire grate air hole 20, so that combustion supporting of garbage is realized.

The forward grate 1 is provided with an ash bucket 34, but in the specific implementation process, the number of ash buckets 34 can be adaptively adjusted according to the length of the forward grate.

The following description will be given of the structure of the reverse push grate 2, in which the reverse push grate 2 is a lower grate, and in the reverse push grate 2, unlike the forward push grate 1, the running direction of the grate segments 7 is opposite to the moving direction of the waste material. The structure forms of the reverse pushing grate 2 and the forward pushing grate 1 are similar, the reverse pushing grate 2 and the longitudinal frame 4 of the forward pushing grate 1 are connected into a whole in front-back, the lower end face is flush, and the reverse pushing grate 2 and the forward pushing grate 1 are arranged in a way of being inclined downwards by 25 degrees horizontally along the downward moving direction of the garbage materials; the tail end of the forward pushing grate 1 and the reverse pushing grate 2 are arranged in a staggered way, the joint is provided with a height difference of 800mm, and the tail end of the forward pushing grate is connected with the reverse pushing grate through a fireproof transition platform or grate.

In this embodiment, three ash hoppers 34 are arranged below the reverse pushing grate 2 to form a plurality of mutually isolated cavities in a segmented manner, so that segmented controllable air supply can be realized, and meanwhile, effective collection of slag leakage in the operation of the grate can be realized.

The left driving beam 11 and the right driving beam 11 of the reverse pushing grate are rectangular in section, triangular operation frames 15 are arranged at corresponding positions below the front end, the middle part and the rear end of the driving beam 11, the bottom plates of the operation frames 15 are arranged in a mode of being inclined upwards by 41 degrees towards the horizontal direction of the forward pushing grate so as to limit the operation direction of the driving beam in the reverse pushing grate, the operation frames 15 are supported by carrier rollers 12 below, and the number of the operation frames 15 is selected according to the length of the driving beam 11. The supporting roller 12 is installed on the transverse frame 5, and the structural form is similar to that of the upper grate roller, and is not described herein.

The drive beam 11 is driven by hydraulic pressure to reciprocate in reverse. Two driving beams 11 which are longitudinally arranged are respectively connected with a rocker arm 9 at the front end of the fire grate through driving pull rods 10; preferably, the driving pull rod 10 is hinged with the driving beam 11 and the rocker arm 9 through movable connecting rods, so that the phenomenon of locking in the driving process is avoided.

The rocker arm 9 comprises a rotary drum 24, an outer arm 25, an inner arm 26 and a rocker arm support 901, one end of the inner arm 26 is fixed in the middle of the rotary drum 24, the other end of the inner arm is hinged with a piston rod of the hydraulic cylinder 8 through a pin shaft, and the fixed end of the hydraulic cylinder 8 is hinged on the hydraulic cylinder support 801. The two outer arms 25 are symmetrically arranged, the middle of each outer arm 25 is respectively connected with two ends of the rotary drum 24, one end of each outer arm is respectively connected with the two driving pull rods 10 through movable connecting rods, and the other end of each outer arm is respectively connected with the two rocker arm supports 901 below through rotating shafts. The hydraulic cylinder 8 moves, and the inner arm 26 and the rotary drum 24 drive the two outer arms 25 to do reciprocating rotation motion around the rocker arm support 901 below, so as to drive the lower fire grate pull rod 10 and the driving beam 11 to do reciprocating motion.

The driving pull rod 10 passes through the transverse frame 5 in the forward pushing grate and then is connected with the driving beam 11 of the reverse pushing grate through a movable connecting rod, the front end, the middle part and the rear end of the driving beam 11 are provided with guide mechanisms 13, and the corresponding positions of the driving beam 11 are provided with guide plates 16, and the structure of the guide mechanisms 13 is the same as that of the guide mechanisms 13 in the forward pushing grate 1, and the difference is that in the reverse pushing grate, the arrangement direction of the guide plates 16 is the same as that of the bottom plate of the running frame 15 in the reverse pushing grate 2, and no description is given here. And correspondingly, a sealing box 18 is arranged on the first transverse frame of the upper fire grate through which the driving pull rod 10 passes, so that the driving pull rod keeps the inside and outside of the fire grate frame isolated in operation.

A plurality of transverse frames 5 are longitudinally arranged between the two longitudinal frames 4 of the reverse pushing grate 2 at intervals, and corresponding holes are formed in the panels of the transverse frames 5 so as to meet the arrangement and operation of the driving beams 11. The upper end of the transverse frame 5 is in the form of a bending plate with a certain angle and round steel bars, and the difference is that the bending direction is opposite to that of the bending plate of the upper fire grate transverse frame 5, so that the installation of the fixed fire grate segments of the lower fire grate is realized, the bending angle is related to the running angle of the lower fire grate, and the bending angle is substantially the same as that of the upper fire grate, so that the installation angle of the fire grate segments of the lower fire grate is the same as that of the lower fire grate. The transverse frame 5 is symmetrically provided with a plurality of groups of guide mechanisms 13 at corresponding positions outside the driving beam 11, the guide wheels 17 are matched with the guide plates 16 on the side plates of the driving beam, left and right guide in the operation of the driving beam is realized, and the angles of the guide wheels 17 and the guide plates 16 are consistent with the operation direction of the driving beam.

Seven groups of movable cross beams 6 are transversely arranged on the two groups of driving beams 11 at intervals, and the movable cross beams 6 and the transverse frames 5 form an alternate arrangement mode. The movable cross beam 6 and the driving beam 11 are combined to form a stable frame structure, and the reciprocating reverse motion is realized under the lower carrier roller support 12 under the drive of the front driving pull rod 10. The movable cross beam 6 is composed of channel steel, inclined plates and rib plates, the inclined plates are perpendicular to the running direction of the driving beam and opposite to the direction of the inclined plates of the movable cross beam of the upper fire grate, convenient installation and flexible running of the clamping grooves at the tail parts of the movable fire grate pieces at the upper part are realized, and the movable cross beam 6 moves along with the driving beam 11, so that the fire grate pieces at the upper part are driven to do reciprocating reverse pushing movement.

The lifting limiting mechanisms 14 are arranged below the two ends of the first movable cross beam, the lifting limiting mechanisms 14 of the lower fire grate are similar to those of the upper fire grate, the lower fire grate consists of a support, rollers and limiting boxes, the rollers are supported by the support in a one-way manner, and the support is reversely arranged below the end head of the movable cross beam 6. The limit box comprises limit frame and limiting plate, and the limit frame is installed on the longitudinal frame 4 medial plate in the end outside of movable cross beam 6, and the limiting plate is installed in the below at limit frame top, and its difference only lies in that the angle of limit frame and limiting plate of lower grate is unanimous with the direction of operation of actuating beam 11, and the running limit mechanism gyro wheel walks under the limiting plate, realizes the upper and lower spacing to movable cross beam 6 and actuating beam 11 through restriction gyro wheel running track, prevents that the grate segment running track from taking place the skew.

The fire grate pieces 7 of the lower fire grate are arranged at the round steel bars above the movable cross beam 6 and the transverse frame 5 by row units, the heads of the fire grate pieces are backwards arranged, and the tail clamping grooves are arranged. The fire grate segment is long, the side surface and the back surface are processing planes, a boss is arranged above the head, and a horizontal strip-shaped conical wind hole 20 is arranged on the rear inclined surface of the boss at the upper part and is used as a channel for combustion air to enter the hearth. The transversely adjacent fire grate plates are tightly contacted and connected by bolts, and the bosses at the heads are arranged in a staggered way, so that the heads of the fire grate plates in the same row form staggered teeth, and the full cutting and stirring of garbage can be realized in operation. The movable fire grate plate is sequentially lapped on the back surface of the front row of fixed fire grate plate through a boss below the head, the back surface of the fire grate plate and the running angle are consistent with the running direction of the driving beam and are arranged in a way of inclining upwards towards the horizontal direction of the push fire grate by 41 degrees, the front part of the first row of fixed fire grate plate is lapped on the inclined plate at the top of the first transverse frame 5 of the lower fire grate, the upper part of the last transverse frame 5 is provided with an arc-shaped scraping blade 22, the front part of the arc-shaped scraping blade is lapped on the back surface of the last row of movable fire grate plate, the compression of the running fire grate plate is realized through a spring mechanism below, and the upward turning of the fire grate plate is prevented. The driving beam 11 drives the movable cross beam 6 to reciprocate, so that the movable fire grate sheet is driven to reciprocate on the back surface of the fixed fire grate sheet, and the overturning, stirring and conveying of the garbage are realized.

The lower fire grate is provided with thirteen rows of fire grate pieces, the installation angles of the fire grate pieces are arranged in a way of being inclined upwards by 41 degrees towards the horizontal direction of the push fire grate, the running angles are 41 degrees upwards, the travel is 400mm, seven groups of movable cross beams 6 and nine groups of transverse frames 5 are arranged, and three groups of running frames 15 and three groups of supporting carrier rollers 12 are arranged below the driving beam 11.

The material layer adjusting device 27 is arranged behind the lower fire grate arc scraping blade 22, and mainly comprises a rotating shaft 2701, a shaking piece 2702 and a rocker arm, wherein the rotating shaft 2701 is arranged between the left and right longitudinal frames 4, one end of the rotating shaft 2701 penetrates out of the longitudinal frames 4 and is provided with the rocker arm at the outer end, and a hydraulic cylinder is arranged outside the longitudinal frames 4 to drive the rocker arm to drive the rotating shaft to rotate. The shaking plate 2702 is connected with the rotating shaft 2701 into a whole, the shaking plate 2702 is transversely in a square groove form, refractory castable is arranged in the square groove, the shaking plate 2702 integrally rotates with the rotating shaft 2701 under the drive of a hydraulic cylinder, the vertical height of the shaking plate 2702 can be adjusted according to operation requirements, and the real-time effective adjustment of the height of a garbage layer on a fire grate is realized. The bed adjusting device 27 is also an aisle for slag to exit the grate after the refuse has been burned out.

A drop of 800mm is arranged between the feeding platform 32 and the upper fire grate and between the upper fire grate and the lower fire grate, a refractory casting material or fire grate is adopted in a drop area, effective transition is realized, and automatic overturning and loosening of garbage materials are realized after passing through the drop.

The left and right longitudinal frames 4 of the fire grate are connected with a plurality of transverse frames 5 to form an integral fire grate frame, the lower end groove steel surface of the longitudinal frame 4 is directly borne on the lower inclined longitudinal beam, the two frames are not connected, and free expansion along the direction of the inclined longitudinal beam can be realized during the operation of the fire grate frame; and a heat insulation silicon-calcium plate is arranged between the channel steel surface and the inclined longitudinal beam, so that the heat insulation and the heat expansion of the fire grate frame along the direction vertical to the inclined longitudinal beam are realized in operation. The fixed blocks 28 are arranged below the front ends of the left and right longitudinal frames 4, the fixed blocks 28 are connected to the bottoms of the ends of the longitudinal frames 4 through welding or bolts, and the fixed blocks 28 are inversely hung at the clamping grooves 3101 at the front ends of the oblique longitudinal beams, namely, the fire grate frames are directly borne on the lower oblique longitudinal beams through the longitudinal frames 4 and are freely hung on the oblique longitudinal beams 31 to achieve limiting of the oblique longitudinal beams 31 in the longitudinal direction, so that the problem of thermal expansion of the fire grate frames in operation is solved briefly and effectively.

The lower fire grate transverse frame 5 is divided into 3 sections according to the whole layout of the fire grate, an ash bucket 34 is arranged below each section, and the sections are relatively isolated, so that air supply to the fire grate in different areas is realized. And the driving beam 11 is provided with triangular sealing shells 29 on the upper and lower sides of the sectional transverse frames 5, the shape and the size of the sealing shells 29 are matched with those of the running frame 15, and the sealing shells 29 on the upper and lower sides are distributed in a central symmetry manner so as to realize mutual isolation of the two sides of the sectional transverse frames 5 in the running process of the driving beam 11, the outer side surfaces of the upper and lower corresponding sealing shells are respectively consistent with the running direction of the driving beam 11, and the shape of a sealing box is continuously matched with the cavity of the driving beam so as to realize blocking isolation. Specifically, the arc-shaped scraping blade 22 comprises an arc-shaped scraping blade body and a spring structure arranged below the arc-shaped scraping blade body, one end of the arc-shaped scraping blade body is pressed on the back surface of the fire grate segment, one end of the arc-shaped scraping blade body is hinged to the transverse frame 5, the spring structure is connected to the arc-shaped scraping blade body, and the other end of the spring structure is connected to the transverse frame 5 to provide a downward traction force for the arc-shaped scraping blade body, so that the fire grate segment is pressed in running, and the fire grate segment is prevented from turning upwards.

In another embodiment, one side of the running rack in the forward pushing grate 1, which is in contact with the supporting roller, is horizontally and upwardly inclined by 10-20 degrees towards the reverse pushing grate to limit the running direction of the driving beam in the forward pushing grate, and one side of the running rack in the reverse pushing grate, which is in contact with the supporting roller, is horizontally and upwardly inclined by 35-45 degrees towards the forward pushing grate to limit the running direction of the driving beam in the reverse pushing grate. The driving beam in the forward pushing grate is inclined downwards towards the reverse pushing grate by 5-15 degrees, and the included angle between one side of the running frame, which is contacted with the supporting idler, and the driving beam is 15-35 degrees. The driving beam in the backward pushing grate is inclined upwards towards the forward pushing grate by 20-30 degrees, the included angle between one side of the running frame, which is contacted with the supporting carrier roller, and the driving beam is 15-25 degrees, the stroke of the driving beam in the forward pushing grate is 200-400 mm, and the stroke of the driving beam in the backward pushing grate is 300-500 mm.

In another embodiment, the difference in height between the forward pushing grate and the reverse pushing grate is 600mm to 900mm.

For convenience of description, the driving device and the driving pull rod in the transmission mechanism 3 of the forward pushing grate 1 are the first driving device and the first driving pull rod, and the driving device and the driving pull rod in the transmission mechanism 3 of the reverse pushing grate 2 are the second driving device and the second driving pull rod. .

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a fire grate for combined type msw incineration with direction and limit elevating system, includes two vertical frames, horizontal frame, fixed fire grate piece, movable cross beam and the movable fire grate piece of each other parallel arrangement install connect the draw-in groove of same row of fixed fire grate piece afterbody on the horizontal frame between the vertical frame to form fixed fire grate plate, the draw-in groove of same row of movable fire grate piece afterbody is connected to the movable cross beam, in order to form movable fire grate plate, movable fire grate plate overlaps around with fixed fire grate plate, and alternately arrange and collect into the grate, and the wind hole has all been seted up to the head of movable fire grate plate and fixed fire grate plate, its characterized in that:

the fire grate is divided into two sections from high to low, the upper section is a forward-pushing fire grate, the lower section is a reverse-pushing fire grate, the fire grate sheet heads on the forward-pushing fire grate face the fire grate low-point direction, the fire grate sheet heads on the reverse-pushing fire grate face the fire grate high-point direction, the movable cross beams of the same section of fire grate are provided with driving beams which are arranged left and right side by side, the left and right driving beams are supported by supporting carrier rollers, the left and right driving beams and the movable cross beams are connected into a driving frame, and the end parts of the driving frame are connected with a transmission mechanism;

The bottom of the driving beam is provided with an operation frame which is in sliding connection with the supporting roller, the longitudinal section of the operation frame is triangular, one side of the triangle is in contact with the supporting roller, one side of the operation frame in contact with the supporting roller in the forward pushing grate is inclined upwards by 10-20 degrees towards the horizontal direction of the reverse pushing grate so as to limit the operation direction of the driving beam in the forward pushing grate, the driving beam in the forward pushing grate is inclined downwards by 5-15 degrees towards the horizontal direction of the reverse pushing grate, and the included angle between one side of the operation frame in contact with the supporting roller and the driving beam is 15-35 degrees;

the outer side of the driving beam is provided with a guide plate corresponding to the running direction of the driving beam, the transverse frame is provided with guide wheels matched with the guide plate to form a guide mechanism, and a lifting limiting mechanism is arranged between the movable cross beam and the longitudinal frame to limit the fire grate through the movable cross beam.

2. The composite fire grate for waste incineration with guiding and lifting limiting mechanism according to claim 1, characterised in that: ash hoppers are arranged below the forward pushing grate and the reverse pushing grate, the ash hoppers, the longitudinal frames and the transverse frames form cavities isolated from the outside to serve as air chambers, and the cavities are horn-shaped with large upper parts and small lower parts.

3. The composite fire grate for waste incineration with guiding and lifting limiting mechanism according to claim 1, characterised in that: in the forward pushing grate, two ends of the driving beams arranged side by side left and right are respectively provided with a driving cross beam connected between the driving beams, a transmission mechanism of the forward pushing grate is connected with a driving frame through the driving cross beams, and a transmission mechanism of the reverse pushing grate is connected with the driving frame through the driving beams in the reverse pushing grate;

the transmission mechanism of the forward pushing fire grate and the backward pushing fire grate are arranged below a feeding platform at one end of the fire grate, wherein the transmission mechanism of the forward pushing fire grate comprises a first driving device and a first driving pull rod with one end connected to the first driving device, the other end of the first driving pull rod is connected with a driving cross beam, the transmission mechanism of the backward pushing fire grate comprises a second driving device, an inner arm with one end connected to the second driving device, a rotary drum, an outer arm and a second driving pull rod, the other end of the inner arm is connected to the middle part of the rotary drum, two ends of the rotary drum are connected to the middle parts of two outer arms arranged side by side, one end of the outer arm is connected to a supporting frame below the feeding platform, the other end of the outer arm is hinged to the second driving pull rod, and the two second driving pull rods are respectively connected to the end parts of the driving beams arranged side by side left and right in the backward pushing fire grate.

4. The composite fire grate for waste incineration with guiding and lifting limiting mechanism according to claim 1, characterised in that: the lifting limiting mechanism comprises a support, rollers and a limiting box, one end of the support is fixedly connected to the end portion of the movable cross beam, the other end of the support is connected with the rollers, the limiting box comprises a limiting frame fixedly connected to the longitudinal frame and a limiting plate arranged below the top of the limiting frame, and the rollers are in rolling connection with the limiting plate so as to limit the fire grate through the movable cross beam.

5. The composite fire grate for waste incineration with guiding and lifting limiting mechanism according to claim 1, characterised in that: the head of each grate segment of the forward pushing grate is provided with a triangular fin;

the head parts of all the fire grate segments of the reverse pushing fire grate are provided with bosses, and the bosses of the head parts of all the fire grate segments of the reverse pushing fire grate are arranged in a staggered manner so that the fire grate plates of the same row form a staggered tooth-shaped structure which is transversely arranged.

6. The composite fire grate for waste incineration with guiding and lifting limiting mechanism according to claim 1, characterised in that: the longitudinal frames are connected with the transverse frames to form fire grate frames, the fire grate frames are placed on the inclined longitudinal beams through the bottom surfaces of the longitudinal frames, fixing blocks are arranged at the bottoms of the ends, far away from the fire grate low points, of the longitudinal frames, and the fixing blocks are clamped in clamping grooves arranged on the inclined longitudinal beams, far away from the fire grate low points, so that the fire grate frames are hung on the inclined longitudinal beams freely.

7. The composite fire grate for waste incineration with guiding and lifting limiting mechanism according to claim 1, characterised in that: the height difference between the forward pushing grate and the reverse pushing grate is 600-900 mm, and the tail end of the forward pushing grate is connected with the reverse pushing grate through a fireproof transition platform or grate.

8. The composite fire grate for waste incineration with guiding and lifting limiting mechanism according to claim 1, characterised in that: the tail end of the fire grate is provided with a material layer adjusting device, the material layer adjusting device comprises a rotating shaft, a shaking plate and a rocker arm, the rotating shaft is rotationally connected to the longitudinal frame, one end of the rotating shaft penetrates through the longitudinal frame, the rocker arm is connected to one end of the rotating shaft, the shaking plate is connected with the rotating shaft into a whole, and the shaking plate and the rotating shaft rotate under the driving of the rocker arm to adjust the vertical height of the shaking plate, so that the height of a garbage layer on the fire grate can be adjusted in real time.

9. The composite fire grate for waste incineration with guiding and lifting limiting mechanism according to claim 1, characterised in that: one side of the running frame in the reverse pushing grate, which is contacted with the supporting roller, is inclined upwards towards the horizontal direction of the forward pushing grate by 35-45 degrees to limit the running direction of the driving beam in the reverse pushing grate, the driving beam in the reverse pushing grate is inclined upwards towards the horizontal direction of the forward pushing grate by 20-30 degrees, and the included angle between one side of the running frame in the reverse pushing grate, which is contacted with the supporting roller, and the driving beam is 15-25 degrees.

10. The composite fire grate with guiding and lifting limiting mechanism as defined in claim 9, wherein: the travel of the driving beam in the forward pushing grate is 200-400 mm, and the travel of the driving beam in the reverse pushing grate is 300-500 mm.