Oil furnace grate roller structure

Abstract

The present application relates to incinerator technical field, disclose a kind of oil furnace grate roller structure, it is used to support on grate bottom, including support frame and multiple groups of roller group, roller group is installed on support frame, and roller group includes first roller and second roller, support frame is also equipped with adjusting mechanism, when grate reciprocating, adjusting mechanism drives first roller and second roller to support in grate bottom by interlacing each other;The adjusting mechanism of the present application can make first roller and second roller respectively self-rotate along the same direction in the use process, so that the uniform wear is evenly distributed on the surface of first roller and second roller, thereby improving the service life of first roller and second roller, first roller and second roller also will not produce deformation, only shortening of diameter will be generated, therefore will not affect the different length movement of grate facing different fuels.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of incinerator, in particular to an oil furnace grate roller structure. BACKGROUND

[0002] In the incinerator, the grate is an important part of the solid fuel combustion equipment, which is used to support the fuel and allow air to enter from below to help combustion, wherein the grate is most commonly designed as an inclined type and is composed of movable grate pieces and fixed grate pieces, which are alternately arranged, and when the movable grate is driven to move back and forth, the roller supports the movable grate from the bottom to enable it to move stably.

[0003] As disclosed in the patent with publication number CN201795500U and publication date of April 13, 2011, an external grate roller device is disclosed, which comprises a grate, a pull rod, a primary air chamber, a roller shaft and a roller bearing seat. The primary air chamber is arranged below the grate, and the movable cross beam of the grate is equipped with left and right pull rods arranged side by side. The pull rod is supported by the roller shaft, and the shaft necks at both ends of the roller shaft are supported by the roller bearing seat. The roller bearing seat is located outside the primary air chamber and is supported downward by the side beam or the middle beam of the grate.

[0004] In the prior art, the grate is driven to move back and forth in the oil furnace to achieve the propulsion of the fuel in the oil furnace, and the roller is supported below the oil furnace to improve the stability of the grate during movement. Since the bottom of the grate is in real-time contact with the roller, friction occurs between the two when the grate moves and the roller rotates. This friction causes the surface of the roller to be constantly worn. In addition, the single movement length of the roller varies according to different fuels, for example: high volatile fuel (such as biomass), the single length of the grate is relatively short, between 50-100mm, so as to avoid the release of volatile components causing unstable combustion; low volatile fuel (such as anthracite), the single movement length is relatively long, between 150-250mm, to ensure sufficient combustion time. When the single movement of the grate is relatively short, the movement length of the grate does not reach the circumference length of the roller, i.e. the single movement of the grate causes the roller to rotate less than 360 degrees. At this time, the wear area on the roller is concentrated in a certain arc segment, which will cause local severe wear of the roller over a long period of time, while other parts have not been worn. The roller gradually changes from a circular shape to an approximate cam shape. In addition, the height of the existing roller is mostly adjustable to adapt to the continued use of the worn roller. The existing technology mostly uses springs, electric push rods, etc. to adjust the height of the roller, so that the roller always fits the bottom of the grate. When the oil furnace is replaced with fuel and the grate needs to move longer, the roller rotates more than 360 degrees to support the rotation of the grate. The deformed roller in the approximate cam shape causes the grate to have a tendency to move upward when moving horizontally, thereby affecting the subsequent use of the grate. SUMMARY

[0005] The oil furnace grate supporting roller structure aims to solve the above problems in the prior art.

[0006] To achieve the above object, the oil furnace grate supporting roller structure comprises a supporting frame and a plurality of groups of supporting rollers, the supporting rollers are installed on the supporting frame, the supporting rollers comprise a first supporting roller and a second supporting roller, and an adjusting mechanism is further installed on the supporting frame, the adjusting mechanism drives the first supporting roller and the second supporting roller to support the grate bottom alternately when the grate reciprocates.

[0007] Preferably, the supporting frame comprises a cross beam and two groups of vertical beams, the two ends of the cross beam are fixedly connected to the upper ends of the two groups of vertical beams, the groups of supporting rollers are installed on the cross beam, and the groups of supporting rollers are equidistantly distributed along the length direction of the cross beam.

[0008] Preferably, the cross beam is provided with a first supporting box and a second supporting box and a plurality of slide grooves, the first supporting box and the second supporting box are respectively located in two adjacent slide grooves and form a sliding guide cooperation with the slide grooves, the first supporting roller is located in the first supporting box and rotationally connected to the first supporting box, and the second supporting roller is located in the second supporting box and rotationally connected to the second supporting box.

[0009] Preferably, the first supporting roller is detachably connected to the first supporting box, and the second supporting roller is detachably connected to the second supporting box.

[0010] Preferably, the adjusting mechanism drives the first supporting box and the second supporting box to intermittently ascend and descend in the slide grooves.

[0011] Preferably, the first supporting box and the second supporting box are both provided with a dust falling prevention box.

[0012] Preferably, the first supporting roller and the second supporting roller comprise a first state and a second state, in the first state, the first supporting roller supports the grate bottom and the second supporting roller is separated from the grate bottom, in the second state, the first supporting roller is separated from the grate bottom and the second supporting roller supports the grate bottom, and the adjusting mechanism is used to switch the first state and the second state between the first supporting roller and the second supporting roller.

[0013] Preferably, the adjusting mechanism comprises a driving member and a transmission member, the driving member is used to drive the transmission member to rotate in the supporting frame and drive the first supporting roller and the second supporting roller to alternately ascend and descend in the process of rotation.

[0014] Preferably, the transmission member comprises a crankshaft and a connecting rod, the crankshaft and the driving member are both provided with a sprocket, a chain is sleeved on the sprocket, the transmission member is transmissionally connected to the crankshaft through the chain, the cross beam is hollow, and the two ends of the crankshaft are rotationally connected to the inner wall of the cross beam.

[0015] Preferably, the connecting rods are provided in multiple groups, the multiple groups of connecting rods correspond to multiple groups of the first supporting boxes and the second supporting boxes respectively, one end of two adjacent groups of connecting rods is rotationally connected with the first supporting box and the second supporting box respectively, and the other end is connected with the crankshaft.

[0016] The application has the advantages that in the above technical scheme, the adjusting mechanism can make the first and second supporting rollers rotate in the same direction and wear evenly on the surfaces of the first and second supporting rollers, thereby prolonging the service life of the first and second supporting rollers, and the first and second supporting rollers will not deform but only shorten in diameter, so that the grate does not affect the movement of different fuels with different lengths. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0018] Figure 1 The structural schematic diagram provided for the embodiments of the present application is shown in the figure.

[0019] Figure 2 Another structural schematic diagram provided for the embodiments of the present application is shown in the figure.

[0020] Figure 3 The structural schematic diagram provided for the embodiments of the present application is shown in the figure. Figure 2 The enlarged view of A in the figure.

[0021] Figure 4 The structural schematic diagram of the front view provided for the embodiments of the present application is shown in the figure.

[0022] Figure 5 The enlarged view of B in the figure. Figure 3

[0023] Figure 6 The enlarged view of C in the figure. Figure 4

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 1, support frame; 11, first supporting box; 12, second supporting box; 13, sliding chute; 14, dust falling prevention box; 141, accommodation groove; 15, limiting block; 151, first rack; 152, second rack; 153, gear; 154, wedge surface; 16, limiting groove; 17, clamping groove; 18, movable groove; 19, protruding block;

[0026] ​​2, roller group; 21, first roller; 22, second roller;

[0027] 3, adjusting mechanism; 31, driving member;

[0028] 32, transmission member; 321, crankshaft; 3211, connecting rod journal; 322, connecting rod;

[0029] 4, grate. DETAILED DESCRIPTION

[0030] In order to make the technical personnel in the art better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the drawings.

[0031] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation and be operated, therefore it cannot be understood as a limitation on the present application. In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] As Figures 1-6 shown, the present application provides a kind of oil furnace grate roller structure, it is used to support at grate bottom, including support frame 1 and multiple groups of roller group 2, roller group 2 is installed on support frame 1, roller group 2 includes first roller 21 and second roller 22, support frame 1 is also equipped with adjusting mechanism 3, when grate 4 reciprocating, adjusting mechanism 3 drives first roller 21 and second roller 22 and is supported at the bottom of grate 4 by interlacing each other.

[0033] Specifically, the support frame 1 is in an inverted U-shaped structure, the support frame 1 comprises a cross beam and two groups of vertical beams, the two ends of the cross beam are fixedly connected to the upper ends of the two groups of vertical beams, the roller groups 2 are installed on the cross beam, a plurality of roller groups 2 are equidistantly distributed along the length direction of the cross beam, the first support box 11 and the second support box 12 are installed on the cross beam, and a plurality of slide grooves 13 are formed, the first support box 11 and the second support box 12 are respectively located in two adjacent slide grooves 13 and form a sliding guide cooperation with the slide grooves 13, the first roller 21 is located in the first support box 11 and rotationally connected with the first support box 11, the second roller 22 is located in the second support box 12 and rotationally connected with the second support box 12, in other embodiments of the present application, the first roller 21 can be detachably connected with the first support box 11, and the second roller 22 can be detachably connected with the second support box 12, the detachable connection mode can be clamping, pin shaft connection and the like, which is prior art and will not be described in detail, through the detachable connection mode of the first roller 21, the first support box 11, the second roller 22 and the second support box 12, the first roller 21 and the second roller 22 can be conveniently replaced;

[0034] The adjusting mechanism 3 drives the first support box 11 and the second support box 12 to intermittently ascend and descend in the slide groove 13, and drives the first roller 21 and the second roller 22 to intermittently ascend and descend, that is, in the process of ascending of the first roller 21, the second roller 22 descends, in the embodiment, the direction of horizontal reciprocating movement of the grate 4 is respectively the first direction and the second direction, that is, one of the first direction and the second direction is forward, one is backward, and the two are opposite directions, as shown in Figure 5 the initial state, the horizontal height of the first roller 21 is higher than that of the second roller 22, the first roller 21 is in contact with the bottom of the grate 4, and the second roller 22 is separated from the bottom of the grate 4, that is, the second roller 22 has a certain distance from the bottom of the grate 4, then, when the grate 4 is driven to move in the first direction, the first roller 21 is supported on the bottom of the grate 4, and the movement of the grate 4 in the first direction drives the first roller 21 to rotate on the first support box 11, at this time, the second roller 22 is in a static state;

[0035] When the movement of the grate 4 in the first direction is completed and the grate 4 starts to move in the second direction, the adjusting mechanism 3 drives the first support box 11 to descend in the slide groove 13 and drives the first roller 21 to descend and separate from the support of the bottom of the grate 4, at the same time, the second support box 12 ascends in the other adjacent slide groove 13 and drives the second roller 22 to ascend synchronously and contact with the bottom of the grate, at this time, the second roller is supported on the bottom of the grate;

[0036] Subsequently, when the grate 4 is driven to move in the second direction, the movement of the grate 4 drives the second roller 22 to rotate in the second support box 12 until the grate 4 stops moving in the second direction and starts moving in the first direction again. The above steps are repeated, that is, the second roller 22 is lowered, and the first roller 21 is raised. Through the interlaced lifting drive of the first roller 21 and the second roller 22, the first roller 21 and the second roller 22 are in contact with the bottom of the grate in turn in the two directions of reciprocating movement of the grate 4, that is, the first roller is in contact with the grate in the first direction, and the second roller is in contact with the grate in the second direction. Since the first roller 21 is always in contact with the grate 4 moving in the first direction, the first roller 21 will always rotate in the same direction. Similarly, since the second roller 22 is always in contact with the grate 4 moving in the second direction, the second roller 22 will also always rotate in the same direction. That is, the first roller and the second roller will not reset rotation. The rotation directions of the first roller 21 and the second roller 22 are opposite. When the surfaces of the first roller 21 and the second roller 22 are worn, the rotation of the first roller 21 and the second roller 22 in the same direction can make the wear evenly distributed on the surfaces of the first roller 21 and the second roller 22, thereby improving the service life of the first roller 21 and the second roller 22. Moreover, the first roller 21 and the second roller 22 will not deform, but only shorten in diameter, so they will not affect the movement of the grate 4 to different lengths facing different fuels.

[0037] In optional embodiments, the first support box 11 and the second support box 12 are each provided with a dust and ash prevention box 14.

[0038] Specifically, in the present embodiment, the first support box 11 and the second support box 12 are both U-shaped mechanisms with openings facing upwards, and the dust and ash prevention boxes 14 are installed on the top openings of the first support box 11 and the second support box 12. The bottom of the first support box 11 is provided with a protrusion, and two limiting grooves 16 are formed on the two sides of the first support box 11. The protrusion is located in the first limiting groove 16 and forms a limiting abutting fit with the first limiting groove 16. The dust and ash prevention box 14 is further provided with a yielding groove 141, and the top of the first roller 21 passes through the yielding groove 141 and extends out of the yielding groove 141. The part of the first roller 21 extending out of the yielding groove 141 is in contact with the bottom of the grate 4. Similarly, the first support box 11 and the second support box 12 are the same in shape, and the two groups of dust and ash prevention boxes 14 thereon are also the same, and details are not described herein. Through the arrangement of the dust and ash prevention boxes 14, the waste slag on the grate 4 can be prevented from falling on the first roller 21 and the second roller 22, so as to avoid the influence of the waste slag on the rotation of the first roller 21 and the second roller 22.

[0039] In an optional embodiment, a first state and a second state are included between the first roller 21 and the second roller 22, in the first state, the first roller 21 is supported on the bottom of the grate 4, and the second roller 22 is separated from the bottom of the grate 4, in the second state, the first roller 21 is separated from the bottom of the grate 4, and the second roller 22 is supported on the bottom of the grate 4, the adjusting mechanism 3 is used to switch the first state and the second state between the first roller 21 and the second roller 22.

[0040] The adjusting mechanism 3 includes a driving member 31 and a transmission member 32, the driving member 31 is used to drive the transmission member 32 to rotate in the support frame 1, and in the process of rotation, the first roller 21 and the second roller 22 are lifted alternately.

[0041] Specifically, the driving member 31 is installed on the vertical beam, the transmission member 32 is installed in the cross beam, the driving member 31 can be a rotating driving mechanism such as a motor or a rotary cylinder, the transmission member 32 includes a crankshaft 321 and a connecting rod 322, the crankshaft 321 and the driving member 31 are both installed with sprockets, the sprockets are sleeved with chains, the two groups of sprockets are connected by the chains, the driving member 31 is connected to the crankshaft 321 by the sprocket and the chain, the inside of the cross beam is hollow, the two ends of the crankshaft 321 are rotatably connected to the inner wall of the cross beam, the driving member 31 can drive the crankshaft 321 to rotate in the cross beam, the connecting rod 322 is provided in multiple groups, the multiple groups of connecting rods 322 correspond to the multiple groups of first support boxes 11 and second support boxes 12 respectively, one end of each of the two adjacent groups of connecting rods 322 is rotatably connected to the first support box 11 and the second support box 12 respectively, and the other end is connected to the crankshaft 321, the crankshaft 321 is provided with multiple connecting rod necks 3211, the two adjacent connecting rod necks 3211 are arranged along the central axis of the crankshaft 321, and the other end of the connecting rod 322 is rotatably connected to the crankshaft 321 through the connecting rod neck 3211;

[0042] In actual use, before the grate 4 moves in the first direction, the driving member 31 drives the sprocket at the output end to rotate, the sprocket drives the sprocket on the crankshaft 321 to rotate through the chain, and drives the crankshaft 321 to rotate synchronously, the rotation of the crankshaft 321 drives the connecting rod 322 connected to the first support box 11 to rise in the chute 13, and lifts the first support box 11 upward at the same time, and drives the first roller to rise synchronously, so that the first roller 21 rises and contacts the bottom of the grate 4, at the same time, the connecting rod 322 connected to the second support box 12 is driven by the crankshaft 321 to descend in the chute, and drives the second support box 12 and the second roller 22 to descend synchronously, so that the second roller 22 is separated from the bottom of the grate 4, at this time, the first state of the first roller 21 and the second roller 22 is reached, that is, the first roller 21 is supported on the bottom of the grate 4, and the second roller 22 is separated from the bottom of the grate 4;

[0043] When the grate 4 starts to move in the first direction, the first roller 21 and the second roller 22 remain in the first state, and the crankshaft 321 remains in the static state;

[0044] Conversely, when the movement of the grate 4 along the first direction is finished and before the movement along the second direction is prepared, the crankshaft 321 rotates again to drive the connecting rod 322 connected to the first support box 11 to reset and drop in the sliding groove 13, and drive the first support box 11 to drop, at the same time, drive the first supporting roller to drop synchronously, so that the first supporting roller 21 is separated from the bottom of the grate 4, at the same time, the connecting rod 322 connected to the second support box 12 is driven by the crankshaft 321 to rise in the sliding groove, and drive the second support box 12 to rise in the sliding groove 13, the rising of the second support box 12 drives the second supporting roller 22 to rise, and the second supporting roller after rising is in contact with the bottom of the grate 4, at this time, the second state of the first supporting roller 21 and the second supporting roller 22 is reached, that is, the first supporting roller 21 is separated from the bottom of the grate 4, and the second supporting roller 22 is supported on the bottom of the grate 4,

[0045] Subsequently, when the grate 4 starts to move along the second direction, the first supporting roller 21 and the second supporting roller 22 remain in the first state, and the crankshaft 321 remains in the static state, and the reciprocation is carried out in turn, when the grate 4 moves reciprocally, the first supporting roller 21 and the second supporting roller 22 are switched between the first state and the second state, so that the first supporting roller 21 and the second supporting roller 22 can rotate in the respective single direction, so that the grinding can be uniformly generated on the surface of the first supporting roller 21 and the second supporting roller 22.

[0046] Further, as Figure 5 and Figure 6As shown, the first support box 11 and the second support box 12 are provided with a limiting block 15, the bottom of the limiting block 15 is fixedly connected to the support frame 1, the inside of the limiting block 15 is provided with a first rack 151, a second rack 152 and a gear 153, the first rack 151 and the second rack 152 are symmetrically arranged along the gear 153, the gear 153 is rotationally connected to the inner wall of the limiting block 15, the first rack 151 and the second rack 152 are both engaged with the gear 153, the first rack 151 and the second rack 152 are located inside the limiting groove 16 provided in the inside of the limiting block 15 and form a sliding guide cooperation with the limiting groove 16, the end of the first rack 151 and the second rack 152 away from the gear 153 is provided with a wedge surface 154, the opposite side of the first support box 11 and the second support box 12 is both provided with a clamping groove 17 and a movable groove 18, the clamping groove 17 and the movable groove 18 are both vertically provided, and the clamping groove 17 and the movable groove 18 are provided with a protrusion 19, the first rack 151 and the second rack 152 form a wedge cooperation with the protrusion 19 through the wedge surface 154, the wedge surface 154 on the first rack 151 and the second rack 152 are both towards the bottom, the connecting rod 322 is a elastic telescopic structure, that is, the connecting rod 322 includes two rod bodies, the two rod bodies are provided with a sleeve rod, one end of the sleeve rod is fixedly connected to one of the two rod bodies, the other end of the sleeve rod extends into the other rod body and is slidably connected with the other rod body, the outer wall of the sleeve rod is provided with a spring, the two ends of the spring are respectively fixedly connected to the two rod bodies, the elastic telescopic structure of the connecting rod 322 is prior art, which will not be described in detail.

[0047] When the first supporting roller 21 and the second supporting roller 22 are in the first state, the first supporting roller 21 is located above the second supporting roller 22, at this time, the connecting rod 322 connected to the first support box 11 is in a natural state, one end of the first rack 151 with the wedge surface 154 extends out of one side of the limiting block 15 and is located in the clamping groove 17 on the outer wall of the first support box 11, at the same time, one end of the second rack 152 with the wedge surface 154 extends out of the other side of the limiting block 15 and is located in the clamping groove 17 on the outer wall of the second support box 12, at this time, the connecting rod 322 connected to the second support box 12 is also in a natural state;

[0048] When the grate 4 starts to move in the first direction, the grate 4 will exert a downward pressure on the first supporting roller 21, at this time, the upper surface of the end of the first rack 151 extending into the clamping groove 17 is in contact with the protrusion 19 and forms a limiting abutting cooperation with the protrusion 19, that is, the first rack 151 at this time forms a locking structure, which prevents the first support box 11 and the first supporting roller 21 from being pressed downward during the process of supporting the grate, and also avoids the pressure exerted by the grate 4 on the first supporting roller 21 from being transmitted to the crankshaft 321, thereby causing the crankshaft 321 to be forced to rotate, therefore, the first supporting roller 21 and the second supporting roller 22 can remain in the first state, and the crankshaft 321 remains in a stationary state;

[0049] When the grate 4 ends moving along the first direction and is ready to move along the second direction, the first roller 21 needs to switch from the first state to the second state, the crankshaft 321 rotates again to drive the connecting rod 322 connected to the first support box 11 to extend out of the sliding groove 13. Since the first support box 11 is locked by the first rack 151, the first support box 11 cannot descend at this time, and the connecting rod 322 connected to the first support box 11 starts to lift at this time, and the connecting rod 322 connected to the second support box 12 starts to rise under the drive of the crankshaft 321, and drives the second support box 12 to rise in the sliding groove 13. The second support box 12 drives the second roller 22 to gradually rise, and one end of the second rack 152 slides in the movable slot 18 on the side of the second support box 12 and descends, and contacts the protrusion 19 in the descending process. The protrusion 19 contacts the wedge surface 154 at the end of the second rack 152, and the protrusion 19 on the second support box 12 forces the second rack 152 to move into the limiting block 15. The movement of the second rack 152 drives the gear 153 to rotate in the limiting block 15. At this time, the torsion spring connected to the gear 153 starts to contract and drives the first rack 151 to reset and contract into the limiting block 15, that is, one end of the first rack 151 is out of the clamping slot 17 on the side of the first support box 11 and releases the locking of the first support box 11. Since the connecting rod 322 connected to the first support box 11 is already in a stretched state, the connecting rod 322 quickly resets and pulls down the first support box 11 at the moment when the first support box 11 is unlocked, so that the first roller 21 descends and is out of the support of the bottom of the grate 4. After the second rack 152 passes the protrusion on the side of the second support box 12, the clamping slot 17 on the side of the second support box 12 corresponds to the limiting slot 16 on the upper limiting block 15. The torsion spring quickly resets and drives the second rack 152 to extend out of the limiting slot 16. With the second rack 152 inserted into the clamping slot 17 on the side of the second support box 12, the second support box 12 is locked and cannot continue to descend under the limitation of the second rack 152. At the same time, the first rack 151 extends out of the limiting block 15 and enters the movable slot 18 on the side of the first support box 11. At this time, the first roller 21 and the second roller 22 are switched from the first state to the second state;

[0050] Conversely, when the grate 4 ends moving along the second direction and is ready to move along the first direction again, the first roller 21 and the second roller 22 need to switch from the second state to the first state, and the above steps are repeated in reverse;

[0051] In summary, in the process of switching from the first state to the second state in the present embodiment, the first roller 21 remains in a stationary state at the initial stage of the second roller 22 rising, and starts to descend when the rising stroke of the second roller 22 reaches the end. It can be understood that in the process of the second roller 22 rising and being locked, the first roller 21 is unlocked and reset, although the locking of the second roller 22 and the unlocking of the first roller 21 still has a certain time difference, which is the time when the second rack 152 passes the side bump 19 of the second support box 12, but this time is extremely short and can be ignored, that is, when the second roller 22 is supported on the grate 4, the first roller 21 is separated from the supporting effect on the grate 4, avoiding the problem that the grate 4 cannot be supported during the moving process of the first roller 21 and the second roller 22 synchronously rising and falling. Conversely, the above is also true in the process of switching from the second state to the first state of the second roller 22.

[0052] It should be noted that the spring on the connecting rod 322 and the torsion spring on the gear 153 are made of high-temperature-resistant materials to adapt to the high-temperature operation in the furnace. A temperature insulation box can also be installed outside the driving member 31. In other embodiments, the driving member 31 can also be installed outside the oil furnace, as long as it can be drivingly connected to the crankshaft 321.

[0053] The above only describes some exemplary embodiments of the present application by way of illustration. It is not doubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present application.

Claims

1. A grate support roller structure for an oil furnace, used for supporting the bottom of the grate, characterized in that, It includes a support frame and multiple sets of idler rollers. The idler roller sets are installed on the support frame and include a first idler roller and a second idler roller. An adjustment mechanism is also installed on the support frame. When the grate moves back and forth, the adjustment mechanism drives the first idler roller and the second idler roller to support each other at the bottom of the grate. The support frame includes a crossbeam and two sets of vertical beams. The two ends of the crossbeam are fixedly connected to the upper ends of the two sets of vertical beams. The roller sets are installed on the crossbeam. Multiple sets of roller sets are equidistantly distributed along the length of the crossbeam. A first support box and a second support box are installed on the crossbeam, and multiple sets of sliding grooves are opened. The first support box and the second support box are respectively located in two sets of adjacent sliding grooves and form a sliding guide engagement with the sliding grooves. The first roller is located in the first support box and is rotatably connected to the first support box. The second roller is located in the second support box and is rotatably connected to the second support box. The adjustment mechanism includes a drive component and a transmission component. The drive component drives the transmission component to rotate within the support frame, and during rotation, it drives the first and second idler rollers to alternately rise and fall. The transmission component includes a crankshaft and connecting rods. Both the crankshaft and the drive component are equipped with sprockets, and chains are fitted onto the sprockets. The transmission component is connected to the crankshaft via the chain drive. The crossbeam is hollow inside, and both ends of the crankshaft are rotatably connected to the inner wall of the crossbeam. There are multiple sets of connecting rods, each corresponding to multiple sets of first and second support boxes. One end of two adjacent sets of connecting rods is rotatably connected to the first and second support boxes, respectively, and the other end is connected to the crankshaft. Before the grate moves in the first direction, the drive unit drives the sprocket at its output end to rotate. This sprocket drives the sprocket on the crankshaft to rotate via a chain, and drives the crankshaft to rotate synchronously. The rotation of the crankshaft drives the connecting rod connected to the first support box to rise in the slide groove, and pushes the first support box upward. At the same time, it drives the first idler roller to rise synchronously and contact the bottom of the grate. Meanwhile, the connecting rod connected to the second support box descends in the slide groove under the drive of the crankshaft, and drives the second support box and the second idler roller to descend synchronously, so that the second idler roller disengages from the bottom of the grate. At this time, the first state of the first idler roller and the second idler roller is achieved. When the grate finishes moving in the first direction and is about to move in the second direction, the crankshaft rotates again, causing the connecting rod connected to the first support box to reset and descend in the slide groove, and causing the first support box to descend. At the same time, the first idler roller descends synchronously, causing the first idler roller to disengage from the bottom of the grate. Simultaneously, the connecting rod connected to the second support box rises in the slide groove under the drive of the crankshaft, and causes the second support box to rise in the slide groove. The rise of the second support box causes the second idler roller to rise. After rising, the second idler roller contacts the bottom of the grate. At this time, the second state of the first and second idler rollers is reached, that is, the first idler roller disengages from the bottom of the grate, and the second idler roller is supported on the bottom of the grate.

2. The oil furnace grate support roller structure according to claim 1, characterized in that, The first idler roller is detachably connected to the first support box, and the second idler roller is detachably connected to the second support box.

3. The oil furnace grate support roller structure according to claim 1, characterized in that, The adjustment mechanism drives the first support box and the second support box to rise and fall intermittently within the slide groove.

4. The oil furnace grate support roller structure according to claim 1, characterized in that, Dustproof ash collection boxes are installed on both the first and second support boxes.

5. The oil furnace grate support roller structure according to claim 1, characterized in that, There are two states between the first and second idlers. In the first state, the first idler is supported on the bottom of the grate and the second idler is detached from the bottom of the grate. In the second state, the first idler is detached from the bottom of the grate and the second idler is supported on the bottom of the grate. The adjusting mechanism is used to switch between the first and second states between the first and second idlers.

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