CN216784667U - Material return stroke blevile of push - Google Patents

Abstract

The utility model relates to the technical field of belt conveyors, in particular to a material return pushing device, which improves the existing scraping plate machine chain scraping mode into a mode that a push knife directly pushes materials, pushes all scattered materials back to a storage bin, recycles all the scattered materials and solves the technical problem that the materials are difficult to clean manually; the automatic feeding device comprises a frame, a material receiving plate, a push-type broach unit, fixed slideways, movable slideways and a push-pull mechanism, wherein the material receiving plate is fixedly arranged on the upper side of the frame, the fixed slideways are symmetrically fixed on two sides of the frame, the two fixed slideways are parallel to each other, the movable slideways are arranged on the inner sides of the fixed slideways in a sliding manner, the push-type broach unit is arranged on two inner sides of the movable slideways and respectively connected with the two movable slideways, the push-pull mechanism is simultaneously connected with the push-pull unit, intelligent module control can be adopted, manual intervention is not needed in the whole process, the energy consumption is low, the abrasion is small, and the enterprise operation cost is reduced.

Description

Material return stroke blevile of push

Technical Field

The utility model relates to the technical field of belt conveyors, in particular to a material return pushing device.

Background

The head part of the belt conveyor is provided with return belt materials, so that the head part generates material accumulation. The existing solution is that the scraper conveyor drives the scraper belt to rotate in a reciprocating way through a chain, and scattered materials are conveyed to a head blanking bin through the belt. Because the material that scatters has certain viscosity, can form the adhesion on scraping the trigger belt, cause and scrape trigger return stroke area material, cause the secondary material to scatter, scatter the material of scraping trigger below because the space is narrow and small to be difficult to the clearance, pile up and can cause when too much to scrape the trigger and raise the aversion, cause and scrape the unable normal work of trigger, need artifical clearance material that scatters, the trigger is scraped to the re-fixation, takes trouble hard. In addition, the scraper machine cannot be heated, and materials containing water used in low-temperature areas can be frozen and frozen on the belt, so that the scraper machine cannot normally run. Moreover, the scraper machine needs to rotate continuously, which causes the disadvantages of increased energy consumption, too fast abrasion of the scraper machine, and the like.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides a material return pushing device capable of effectively solving the problem of return material scattering, which improves the existing scraping mode of a scraper chain into a mode that a push knife directly pushes materials, pushes all the scattered materials back to a storage bin, recycles all the scattered materials, avoids unnecessary waste, solves the technical problem of difficult manual cleaning, and obviously improves the field environment; the intelligent control module can be adopted to control the working process, the whole process does not need manual intervention, and the control box works intermittently, so that the energy consumption is low and the abrasion is small.

In order to realize the purpose, the utility model is realized by adopting the following technical scheme:

on one hand, the utility model provides a material return pushing device which comprises a frame, material receiving plates, push-type broach units, fixed slideways, movable slideways and a push-pull mechanism, wherein the material receiving plates are fixedly arranged on the upper side of the frame, the fixed slideways are symmetrically fixed on two sides of the frame, the two fixed slideways are parallel to each other, the movable slideways are arranged on the inner sides of the fixed slideways in a sliding manner, the push-type broach units are arranged on the inner sides of the two movable slideways and are respectively connected with the two movable slideways, and the push-pull mechanism is simultaneously connected with the push-pull units.

In a possible technical scheme, the push broach unit comprises a front push broach and a rear push broach, wherein the rear push broach is connected with the push-pull mechanism, the front push broach and the rear push broach are vertically contacted with the material receiving plate, the front push broach is arranged on the front side of the rear push broach in parallel, and two sides of the front push broach and the rear push broach are respectively connected with the two movable slideways.

In one possible technical scheme, the material receiving plate comprises a lifting unit, and when the push-pull mechanism drives the push broach unit to move backwards, the lifting unit drives the push broach unit to lift upwards to be separated from the material receiving plate.

In one possible technical scheme, two ends of the upper side of the front push broach and two ends of the upper side of the rear push broach are respectively provided with a slope plate, the slopes of the slope plates at the two ends are the same and are deviated to the right side, and the rear push broach is hinged with the push-pull mechanism; the rear side of the front push broach is connected with a cross rod, and two ends of the cross rod are respectively hinged with the two movable slideways; fixed slide connects the promotion slide along push-and-pull mechanism's direction of advance, the top of promoting the slide extends to two promotion rectangular bags of installation, and two promotion rectangular bags are located the front side and the rear side of leading push-type broach respectively, promote rectangular bag including rectangular board and rather than the articulated swash plate of front side, the right angle of rectangular board is located upside and open side inwards, the inclination of swash plate with the slope of slope board is the same.

In one possible technical scheme, the push-pull mechanism is a hydraulic cylinder, a cylinder body of the hydraulic cylinder is hinged with the frame, and a piston end of the hydraulic cylinder is hinged with the rear side of the rear push-type broach.

In a possible technical scheme, two sides of the rear push broach are close to the movable slideway and are respectively connected with the groove plates, and the groove plates are fixedly connected with the movable slideway.

In a possible technical scheme, a rear limiting device and a front limiting device are respectively arranged at the starting end and the extending position of the fixed slide way on the frame.

In a possible technical scheme, a heating mechanism is installed on the lower side of the material receiving plate.

On the other hand, the utility model provides a material return pushing method, which is realized according to any one of the material return pushing devices, wherein the material return pushing device is arranged below a return belt of the head of a belt conveyor, and the front part of the material return pushing device extends into a blanking bin; the scattered materials brought back by the return belt fall on the material receiving plate and are accumulated to a certain degree, the control box sends a signal to the hydraulic station to drive the hydraulic cylinder to extend forwards, the rear push broach is pushed to be connected with the movable slide way to drive the front push broach to move forwards along the fixed slide way until the movable slide way reaches the front limiter, and the front push broach pushes the scattered materials scattered on the material receiving plate out of the material receiving plate during the movement and falls into the material falling bin for recycling; the rear push broach pushes the material to the front of a rear stop point of the front push broach, pushes the material out of the material receiving plate when the front push broach moves next time, and falls into the blanking bin again;

when the front push broach and the rear push broach pass through the lifting long bag, the front push broach and the rear push broach move forwards, the inclination angle of the inclined plate is the same as the gradient of the gradient plate, the lifting long bag is lifted upwards, the front push broach and the rear push broach horizontally pass below the lifting long bag, and after the front push broach and the rear push broach pass through the lifting long bag, the lifting long bag falls down again to the initial position due to gravity;

when the movable slideway moves forwards to the front limiter, the control box receives a signal of the front limiter and controls the hydraulic station to stop working; at the moment, the front push broach and the rear push broach are both positioned in front of the two lifting double bags, the control box controls the hydraulic station to work and drive the hydraulic cylinder to retract backwards to pull the rear push broach to connect the movable slideway to drive the front push broach to move backwards along the fixed slideway until the movable slideway reaches the rear limiter, the front push broach and the rear push broach move backwards during the movement due to the fact that the front push broach and the rear push broach move backwards, the inclination angle of the inclined plate is the same as the gradient of the gradient plate, the front push broach and the rear push broach pass over the lifting double bags to drive the front push broach and the rear push broach to lift upwards to the lifting slideway, the front push broach and the rear push broach move backwards above the lifting slideway during the movement, the front push broach and the rear push broach are always in the lifting state until the movable slideway reaches the rear limiter, and the front push broach and the rear push broach fall back to the receiving plate due to gravity along with the end of the lifting slideway, returning to the initial position; at the moment, the control box receives a rear limiter signal and controls the hydraulic station to stop working. And after the scattered materials fall on the material receiving plate and are stacked to a certain degree again, the control box sends a signal to the hydraulic station to complete the next pushing and the circular work.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the existing scraping mode of the scraper chain is changed into a mode that the push-type broach unit pushes materials directly, scattered materials fall on the material receiving plate, and are accumulated to a certain degree and sent out a signal by the control box, the push-pull mechanism pushes the push-type broach unit to move forward, and the materials are directly pushed back to the head blanking bin for recycling, so that unnecessary waste is avoided, and the technical problem that manual work is difficult to clean is solved; after the device is installed, the accumulated materials on the site are removed, the site environment is obviously improved, the cleaning pressure of workers is reduced, the potential threat of accidental shutdown is reduced, and the production efficiency is improved; the material return pushing device can be controlled by an intelligent module, manual intervention is not needed in the whole process, the material return pushing device can intermittently work through the control box, the energy consumption is low, the abrasion is small, and the enterprise operation cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a material return pushing device according to an embodiment of the utility model;

FIG. 2 is a schematic view of the mounting arrangement of the fixed and movable runners;

fig. 3 is a schematic view of a lifting rectangular structure;

fig. 4 is a schematic view of another view angle of the lifting rectangular bag;

reference numerals: 1-a frame; 2-material receiving plate; 3, arranging a push broach in front; 4, arranging a push broach at the rear part; 5-fixing the slideway; 6-a movable slideway; 7-lifting the slideway; 8-lifting the rectangular bag; 81-square plate; 82-a sloping plate; 9-a hydraulic cylinder; 10-a front stop; 11-a rear limiter; 12-a fixing plate; 13-a ramp plate; 14-a cross-bar; 15-slotted plate.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1 to 2, the material return pushing device of the present invention comprises a frame 1, a material receiving plate 2, a push-type broach unit, a fixed slideway 5, a movable slideway 6 and a push-pull mechanism, wherein the shape of the frame 1 is preferably a long strip shape matching with the belt specification of a belt conveyer, the material receiving plate 2 is fixedly arranged at the front part of the upper side of the frame 1, the fixed slideways 5 are symmetrically fixed on two sides of the frame 1, preferably, the fixed slideways 5 are arranged laterally, the two fixed slideways 5 are parallel to each other, the inner sides of the fixed slideways 5 are provided with lateral movable slideways 6 in a sliding way, the push-type broach units are arranged on the inner sides of the two movable slideways 6 and are respectively connected with the two movable slideways 6, the push-type broach units are simultaneously connected with the push-type mechanism, the push-type mechanism drives the push-type broach units to move back and forth along the directions of the movable slideways 6, when the push broach unit moves forwards, the scattered materials accumulated on the material receiving plate 2 can be pushed out of the material receiving plate 2; the push-pull mechanism can be any suitable linear power mechanism, and can be specifically selected according to needs in the actual use process, for example, the push-pull mechanism can be an air cylinder, a hydraulic cylinder, an electric push rod or a robot push-pull mechanism.

When the material return pushing device is used, the material return pushing device is arranged below a return belt of the head of a belt conveyor, and the front of the device extends into a blanking bin, so that the materials pushed back by the push broach unit can all fall into the blanking bin; according to the utility model, the existing scraping mode of the scraper chain is changed into a mode that the push-type broach unit pushes materials directly, scattered materials fall on the material receiving plate 2 and are stacked to a certain degree and sent out a signal by the control box, the push-pull mechanism pushes the push-type broach unit to move forward, and the materials are directly pushed back to the head material receiving bin for recycling, so that unnecessary waste is avoided, and the technical problem that manual work is difficult to clean is solved; after the device is installed, the accumulated materials on the site are removed, the site environment is obviously improved, the cleaning pressure of workers is reduced, the potential threat of accidental shutdown is reduced, and the production efficiency is improved; the material return pushing device can be controlled by an intelligent module, manual intervention is not needed in the whole process, the material return pushing device can intermittently work through the control box, the energy consumption is low, the abrasion is small, and the enterprise operation cost is reduced.

As a preferred embodiment of the material return pushing device of the present invention, the push-type broach unit includes a front push-type broach 3 and a rear push-type broach 4, wherein the rear push-type broach 4 is connected with the push-pull mechanism, the front push-type broach 3 and the rear push-type broach 4 are both vertically contacted with the material receiving plate 2, the front push-type broach 3 is arranged in parallel on the front side of the rear push-type broach 4, and two sides of the front push-type broach 3 and the rear push-type broach 4 are respectively connected with the two movable slideways 6; under the drive of the push-pull mechanism, the front push broach 3 pushes materials stacked at the front end of the material receiving plate 2 out of the material receiving plate 2, meanwhile, the rear push broach 4 pushes the materials on the material receiving plate 2 and located on the rear side of the front push broach 3 forwards synchronously, the materials are pushed out of the material receiving plate 2 when the front push broach 3 pushes the materials next time, the scattered materials can be rapidly stacked to the front side of the material receiving plate 2 through the two stages of push broach arranged in parallel in the front and the rear, the material collecting efficiency is improved, the working frequency of the push broach unit is reduced, and further energy saving and consumption reduction are realized.

As a preferred embodiment of the material return pushing device, the material return pushing device further comprises a lifting unit, when the push-pull mechanism drives the push broach unit to move backwards, the lifting unit drives the push broach unit to lift upwards to be separated from the material receiving plate 2, the lifting unit lifts the push broach unit during return of the push broach unit until the push broach unit returns to a starting point and automatically falls down, the problem that partial materials are brought back due to friction between the push broach unit and the material receiving plate 2 during return of the push broach unit is effectively avoided, the problem that the materials are scattered secondarily due to the fact that the existing scraper machine cannot normally operate due to the fact that the existing scraper machine is difficult to clean due to narrow space is solved, manual cleaning of the scattered materials is no longer needed, working efficiency is improved, and equipment faults are reduced.

As a preferred embodiment of the material return pushing device, the front push broach 3 and the rear push broach 4 are both in a 7 shape, a transverse plate at the top end spans on the frame 1, two ends of the transverse plate are both provided with gradient plates 13, the gradients of the gradient plates 13 at the two ends are the same and are deviated to the right side, the vertical plate is vertically contacted with the material receiving plate 2 to form a push broach main body, and the rear push broach 4 is hinged with the push-pull mechanism; the rear side of the front push broach 3 is connected with a cross rod 14, and two ends of the cross rod 14 are respectively hinged with the two movable slideways 6; the fixed slide way 5 is connected with a lifting slide way 7 along the advancing direction of the push-pull mechanism, two lifting long bags 8 are installed at the top end of the lifting slide way 7 in the extending direction, the two lifting long bags 8 are respectively positioned on the front side and the rear side of the front push broach 3, each lifting long bag 8 comprises a rectangular plate 81 and an inclined plate 82 hinged with the front side of the rectangular plate 81, the right angle of the rectangular plate 81 is positioned on the upper side, the open side is inward, and the inclination angle of the inclined plate 82 is the same as the gradient of the gradient plate 13; when the push-pull mechanism drives the rear push broach 4 to advance, the rear push broach 4 is connected with the movable slideway 6 to drive the front push broach 3 to move forwards along the fixed slideway 5, and during the movement, the front push broach 3 pushes the scattered materials scattered on the material receiving plate 2 out of the material receiving plate 2 and falls into the blanking bin for recycling; the rear push broach 4 pushes the material to the front of a rear stop point of the front push broach 3, pushes the material out of the material receiving plate 2 when the front push broach 3 moves next time, and falls into the blanking bin again;

when the front push broach 3 and the rear push broach 4 pass through the lifting rectangular bag 8, as the front push broach 3 and the rear push broach 4 move forwards, the inclination angle of the sloping plate 82 is the same as the slope of the slope plate 13, the lifting rectangular bag 8 is lifted upwards, the front push broach 3 and the rear push broach 4 pass through the horizontal direction below the lifting rectangular bag 8, and after the front push broach 3 and the rear push broach 4 pass through the lifting rectangular bag 8, the lifting rectangular bag 8 falls back to the initial position again due to gravity; at the moment, the front push broach 3 and the rear push broach 4 are both positioned in front of the two lifting long ropes 8, after the short stop, the push-pull mechanism drives the rear push broach 4 to retract backwards and pull the movable slide way 6 connected with the rear push broach 4 to drive the front push broach 3 to move backwards along the fixed slide way 5, during the movement, as the front push broach 3 and the rear push broach 4 move backwards, the inclination angle of the inclined plate 82 is the same as the gradient of the gradient plate 13, the front push broach 3 and the rear push broach 4 pass over the lifting long ropes 8 to drive the front push broach 3 and the rear push broach 4 to lift upwards onto the lifting slide way 7, the front push broach 3 and the rear push broach 4 are positioned above the lifting slide way 7 to move backwards, during the period, the front push broach 3 and the rear push broach 4 are always in a lifting state, the lower ends of the front push broach 3 and the rear push broach 4 are separated from the material receiving plate 2, the transverse plate at the top ends straddles over the right angle plate 81 along with the end of the lifting long ropes 7, the front push broach 3 and the rear push broach 4 fall back to the receiving plate 2 due to gravity and return to the initial positions.

As a preferred embodiment of the material return pushing device of the present invention, the pushing and pulling mechanism is a hydraulic cylinder 9, a cylinder body of the hydraulic cylinder 9 is hinged to the frame 1, and a piston end of the hydraulic cylinder is hinged to a rear side of the rear push broach 4.

As a preferred embodiment of the material return pushing device of the present invention, two sides of the rear push broach 4 close to the movable slideway 6 are respectively connected with a slot plate 15, and the slot plates 15 are fixedly connected with the movable slideway 6; further, a fixing frame for supporting the hydraulic cylinder 9 is connected between the two groove plates 15, the piston end of the hydraulic cylinder 9 moves in a telescopic mode to drive the groove plates 15 to move, so that the movable slide way 6 is driven to slide along the fixed slide way 5, and the groove plates 15 simultaneously play a role in guiding the pushing direction of the push broach unit.

As a preferred embodiment of the material return pushing device of the present invention, a rear stopper 11 and a front stopper 10 are respectively disposed at the starting end and the extending position of the fixed slide way 5 on the frame 1, when the material return pushing device is controlled by a control box, when the movable slide way 6 moves to the position of the rear stopper 11 or the front stopper 10, the rear stopper 11 or the front stopper 10 can respectively transmit a position signal to the control box, and the control box makes a response instruction according to the signal.

As a preferred embodiment of the material return pushing device of the present invention, a heating mechanism is installed on the lower side of the material receiving plate 2; the existing scraper machine cannot be heated, and water-containing materials used in a low-temperature area can be frozen to a belt, so that the scraper machine cannot normally run; the problem of freezing of the materials in the low-temperature environment can be solved by installing the heating mechanism.

The material return pushing method provided by the embodiment of the utility model is characterized in that a material return pushing device is arranged below a return belt of the head of a belt conveyor, and the front part of the material return pushing device extends into a blanking bin by 100 mm; the frame 1 is fixed on the ground through a fixing plate 12, and the problem that the ground is uneven on site can be adjusted through adjusting screws; scattered materials brought back by the return belt fall on the material receiving plate 2 and are accumulated to a certain degree, a control box sends a signal to a hydraulic station to drive a hydraulic cylinder 9 to extend forwards, a rear push broach 4 is pushed to be connected with a movable slide way 6 to drive a front push broach 3 to move forwards along a fixed slide way 5 until the movable slide way 6 reaches a front limiting stopper 10, and the front push broach 3 pushes the scattered materials scattered on the material receiving plate 2 out of the material receiving plate 2 during movement and falls into a material falling bin for recycling; the rear push broach 4 pushes the material to the front of a rear stop point of the front push broach 3, pushes the material out of the material receiving plate 2 when the front push broach 3 moves next time, and falls into the blanking bin again;

when the front push broach 3 and the rear push broach 4 pass through the lifting rectangular bag 8, as the front push broach 3 and the rear push broach 4 move forwards, the inclination angle of the sloping plate 82 is the same as the slope of the slope plate 13, the lifting rectangular bag 8 is lifted upwards, the front push broach 3 and the rear push broach 4 pass through the horizontal direction below the lifting rectangular bag 8, and after the front push broach 3 and the rear push broach 4 pass through the lifting rectangular bag 8, the lifting rectangular bag 8 falls back to the initial position again due to gravity;

when the movable slideway 6 moves forwards to the front limiter 10, the control box receives a signal of the front limiter 10 and controls the hydraulic station to stop working; at the moment, the front push broach 3 and the rear push broach 4 are both positioned in front of the two lifting long ropes 8, the control box controls the hydraulic station to work and drive the hydraulic cylinder 9 to retract backwards to pull the rear push broach 4 to be connected with the movable slideway 6 to drive the front push broach 3 to move backwards along the fixed slideway 5 until the movable slideway 6 reaches the rear stopper 11, the front push broach 3 and the rear push broach 4 move backwards during the movement, the inclination angle of the sloping plate 82 is the same as the gradient of the gradient plate 13, the front push broach 3 and the rear push broach 4 pass through the upper part of the lifting slideway 8 to drive the front push broach 3 and the rear push broach 4 to lift upwards to the lifting slideway 7, the front push broach 3 and the rear push broach 4 are positioned above the lifting slideway 7 to move backwards, and the front push broach 3 and the rear push broach 4 are always in the lifting state during the movement until the movable slideway 6 reaches the rear stopper 11, after the slide way 7 is lifted, the front push broach 3 and the rear push broach 4 fall back to the material receiving plate 2 due to gravity and return to the initial positions; at this time, the control box receives the signal of the rear stopper 11 and controls the hydraulic station to stop working. When the scattered materials fall on the receiving plate 2 and are piled up to a certain degree again, the control box sends a signal to the hydraulic station to complete the next pushing and the circular work.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be also considered as the protection scope of the present invention.

Claims (8)

1. The material return pushing device is characterized by comprising a frame (1), material receiving plates (2), push broach units, fixed slideways (5), movable slideways (6) and a push-pull mechanism, wherein the material receiving plates (2) are fixedly arranged on the upper side of the frame (1), the fixed slideways (5) are symmetrically fixed on two sides of the frame (1), the movable slideways (6) are arranged on the inner sides of the fixed slideways (5) in a sliding mode, the push broach units are arranged on the inner sides of the two movable slideways (6) and are respectively connected with the two movable slideways (6), and the push broach units are simultaneously connected with the push-pull mechanism.

2. The material return pushing device according to claim 1, wherein the pushing unit comprises a front pushing blade (3) and a rear pushing blade (4), wherein the rear pushing blade (4) is connected with the pushing and pulling mechanism, the front pushing blade (3) and the rear pushing blade (4) are both in vertical contact with the material receiving plate (2), the front pushing blade (3) is arranged in parallel on the front side of the rear pushing blade (4), and two sides of the front pushing blade (3) and the rear pushing blade (4) are respectively connected with the two movable slideways (6).

3. The material return pushing device according to claim 2, characterized by comprising a lifting unit which drives the push-and-pull mechanism to lift the push-and-pull mechanism upward to separate from the receiving plate (2) when the push-and-pull mechanism drives the push-and-pull mechanism to move the push-and-pull mechanism backward.

4. The material return pushing device according to claim 3, wherein the front push broach (3) and the rear push broach (4) are provided with slope plates (13) at both ends of the upper side, the slope plates (13) at both ends have the same slope and are deviated to the right side, and the rear push broach (4) is hinged with the push-pull mechanism; the rear side of the front push broach (3) is connected with a cross rod (14), and two ends of the cross rod (14) are respectively hinged with the two movable slideways (6); fixed slide (5) are connected along push-and-pull mechanism's direction of advance and are promoted slide (7), the top of promoting slide (7) extends to two promotion rectangular bags (8) of installation, and two promotion rectangular bags (8) are located the front side and the rear side of leading push-type broach (3) respectively, promote rectangular bag (8) including rectangular board (81) and rather than preceding side articulated swash plate (82), the right angle of rectangular board (81) is located upside and open side inwards, the inclination of swash plate (82) with the slope of slope board (13) is the same.

5. The material return pushing device according to claim 4, characterized in that the pushing and pulling mechanism is a hydraulic cylinder (9), the cylinder body of the hydraulic cylinder (9) is hinged with the frame (1), and the piston end of the hydraulic cylinder is hinged with the rear side of the rear push broach (4).

6. The material return pushing device according to claim 5, characterized in that two sides of the rear pushing blade (4) close to the movable slideway (6) are respectively connected with a groove plate (15), and the groove plates (15) are fixedly connected with the movable slideway (6).

7. The material return pushing device according to claim 6, characterized in that a rear stopper (11) and a front stopper (10) are respectively arranged on the frame (1) at the starting end and the extending position of the fixed slideway (5).

8. The material return pushing device as claimed in claim 7, characterized in that a heating mechanism is arranged on the lower side of the material receiving plate (2).

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