CN109676894B

CN109676894B - Screw extruder is with maintenance device

Info

Publication number: CN109676894B
Application number: CN201910041930.4A
Authority: CN
Inventors: 李雨杭; 贾棋棋
Original assignee: Shanghai Qishen Plastics Co ltd
Current assignee: Shanghai Qishen Plastics Co.,Ltd.
Priority date: 2019-01-16
Filing date: 2019-01-16
Publication date: 2022-03-08
Anticipated expiration: 2039-01-16
Also published as: CN109676894A

Abstract

The invention discloses a maintenance device for a screw extruder, which comprises a base, a fixed frame and a pressure device, and further comprises a frame holder, a lifting device and a pulling box, wherein the fixed frame is vertically arranged on the base; the invention can be used for maintaining the faults of damage of the bearing of the gearbox of the extruder and breakage of the screw, and hard knocking and hard beating are not needed in the maintenance process, thereby reducing the labor intensity and the maintenance time of maintenance and saving the labor cost required by maintenance; in the maintenance process, undamaged parts on the maintained parts can not be damaged, and the sleeve connected with the broken screw can be recycled, so that the waste of materials is avoided.

Description

Screw extruder is with maintenance device

Technical Field

The invention relates to the field of maintenance devices, in particular to a maintenance device for a screw extruder.

Background

The screw extruder is a common plastic extruding machine and has the advantages of high production efficiency, strong adaptability, wide application and the like. For screw extruders, damage to the gearbox bearings and screw breakage are maintenance tasks that have to be faced. Because no special maintenance device is provided and the quality of damaged parts is high, the two maintenance works have high labor intensity, long time consumption and high labor cost; and because the maintenance worker often adopts the mode of beating hard to beat hard to maintain, undamaged part suffers destruction, leads to the material waste serious.

Disclosure of Invention

The invention aims to provide a maintenance device for a screw extruder, which is convenient for maintaining the damage of a gear box bearing of the extruder and the fault of screw breakage, can reduce the labor time and labor intensity of maintenance, saves the cost of maintenance personnel and avoids the waste of materials.

The invention is realized by the following steps: a maintenance device for a screw extruder comprises a base, a fixed frame, a pressure device, a holding frame, a lifting device and a pulling box arranged at an opening at the upper end, the fixing frame is vertically arranged on the base, the pressure device is arranged on the fixing frame and can move up and down along the fixing frame, the pressure device is used for providing downward pressure, the holding frame is arranged on the base and used for supporting the component to be maintained at a certain height, the pulling box is arranged on the base, wheels are arranged on the pulling box, the pulling box can be pulled out from the base through the wheels, a damping structure is arranged in the pulling box, the lifting device is arranged below the pressure device and at two sides of the pulling box, the lifting device is used for lifting the part to be repaired, which is placed in the pulling box, to a certain height so as to be placed on the holding frame.

Furthermore, the fixed frame consists of two vertical frames vertically arranged on the base and a top plate horizontally arranged on the upper parts of the two vertical frames, the top plate is supported on the vertical frames through rib plates, the number of the rib plates is four, two rib plates are symmetrically arranged at two ends of the top plate respectively, each rib plate consists of a vertical section and an inclined section connected with the vertical section, the vertical section of each rib plate is connected on the vertical frames through bolts, the upper end of the vertical section of each rib plate is supported on the lower end face of the top plate, one end of the inclined section of each rib plate is connected with the lower part of the vertical section of each rib plate, the other end of the inclined section of each rib plate is connected with the lower end face of the top plate, and the connected position of the inclined section of each rib plate is close to the middle part of the lower end face of the top plate; the upper ends of the two ends of the top plate are provided with check blocks, the lower ends of the check blocks are tightly connected with the upper end of the top plate, and the check blocks are installed on the vertical frame through bolts and are in one-to-one correspondence with the vertical sections of the rib plates.

Further, the pressure device comprises a pressure plate and a pressure supply device, wherein the pressure supply device is arranged on the upper end surface of the pressure plate; the cross section of each vertical frame is n-shaped, the openings of the two vertical frames are oppositely arranged, the upper ends of the two vertical frames are respectively provided with an n-shaped frame, the opening directions of the n-shaped frame and the vertical frames are opposite, and a pulley is respectively vertically arranged on the n-shaped frame and the upper ends of the vertical frames to form a pulley block; two ends of the pressing plate are respectively connected with a pull rope, the other ends of the two pull ropes respectively penetrate through two pulleys of a pulley block and then are connected with a weight device, and the weight device pulls up the pressing plate through the pull ropes; the lower end of the pressure plate is provided with a shaft-shaped piece.

Further, the pressure supply device can be a hydraulic cylinder, an air cylinder, an electric cylinder or a hydraulic jack.

Furthermore, the weight device comprises a weight block, the weight block is of a rectangular structure, a plurality of horizontally arranged rectangular through holes are formed in the weight block in the vertical direction, the through holes are different in size, threaded through holes communicated with the through holes in a one-to-one correspondence mode are formed in the weight block, and fastening bolts are arranged on the threaded through holes.

Furthermore, a first T-shaped groove is formed in the lower end face of the pressing plate along the length direction of the pressing plate, a first T-shaped sliding block is arranged in the first T-shaped groove and can freely slide in the first T-shaped groove, the upper end of the shaft-shaped part is connected to the lower end face of the first T-shaped sliding block, a conical concave hole is formed in the lower end face of the shaft-shaped part, and the area of the cross section of the upper end of the conical concave hole is smaller than that of the cross section of the lower end of the conical concave hole; a groove leading to one end of the first T-shaped groove from the side edge of the pressing plate is formed in the lower end face of the pressing plate and used for installing and disassembling the first T-shaped sliding block.

Furthermore, the support frame comprises a rear support frame, a front support frame and two support plates arranged at the upper ends of the rear support frame and the front support frame, the rear support frame and the front support frame are respectively arranged at two sides of the fixing frame, the rear support frame consists of a plurality of rear vertical support rods vertically arranged on the base and a rear support plate arranged at the upper ends of the plurality of rear vertical support rods, the front support frame comprises two front vertical support rods, the two front vertical support rods are respectively arranged at two ends of the base, the pulling box can pass through the two front vertical support rods, the upper ends of the two front vertical support rods are respectively and fixedly connected with a hinge frame, and each hinge frame is hinged with one front support plate; a second T-shaped groove is formed in the upper end face, located between the two front vertical support rods, of the base, a second T-shaped sliding block is arranged in the second T-shaped groove and can freely slide in the second T-shaped groove, a sliding support rod is vertically arranged at the upper end of the second T-shaped sliding block, the free ends of the two front support plates can be simultaneously arranged at the upper end of the sliding support rod, the upper end faces of the rear support plate and the front support plate are located on the same horizontal plane, a groove leading to the second T-shaped groove from the side edge of the bottom plate is formed in the upper end face of the bottom plate, and the groove is used for mounting and dismounting the second T-shaped sliding block; the upper end face of the rear supporting plate is provided with a long strip-shaped groove, a connecting sliding block is arranged in the long strip-shaped groove, the connecting sliding block is cylindrical, the diameter of the connecting sliding block is the same as the width of the long strip-shaped groove, and the upper end of the connecting sliding block is fixedly connected with one end of the supporting plate.

Furthermore, at least two wheels are respectively arranged on two sides of the pulling box, a group of mutually parallel slideways are arranged on the bottom plate, and the wheels are arranged in the slideways; the damping structure of the drawing box comprises springs and a lifting plate, a plurality of spring placing grooves are formed in the upper end face of the bottom wall of the drawing box, the springs are placed in the spring placing grooves in a one-to-one correspondence mode, the lifting plate is placed on the springs, a rubber layer is arranged on the upper end face of the lifting plate, and a rubber layer is arranged on the inner side face of the wall of the drawing box.

Furthermore, one side of the pulling box close to the front support frame is not provided with a box body wall, one end of each box body side wall of the pulling box adjacent to the side close to the side is vertically provided with a slot, a plug board is arranged in each slot, a handle is arranged on the outer side face of each plug board, and a rubber layer is arranged on the inner side face of each plug board.

Furthermore, rectangular notches are vertically arranged on two side walls of the pulling box provided with the wheels, and extend from the top end of the wall of the pulling box to the lower part of the lifting plate; the lifting device comprises a Z-shaped plate and lifting equipment, the width of the Z-shaped plate is slightly smaller than the width of the rectangular notch, the upper end face of the lower transverse part of the Z-shaped plate is connected with the lower end face of the lifting plate, the upper transverse part of the Z-shaped plate penetrates through the rectangular notch to extend out of the pulling box, and the upper transverse part of the upper end of the Z-shaped plate is located above the lifting end of the lifting equipment when the pulling box is pushed to the innermost end.

Compared with the prior art, the invention has the beneficial effects that: the invention is provided with the base, the fixing frame, the pressure device, the frame holding frame, the lifting device and the pulling box, and can be used for maintaining the faults of damage of the bearing of the gear box of the extruder and fracture of the screw rod, and hard beating is not needed in the maintenance process, so that the labor intensity and the maintenance time of maintenance are reduced, and the labor cost required by maintenance is saved; in the maintenance process, undamaged parts on the maintained parts can not be damaged, and the sleeve connected with the broken screw can be recycled, so that the waste of materials is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a perspective view of a maintenance device for a screw extruder according to the present invention;

FIG. 2 is an enlarged view of area A of FIG. 1;

FIG. 3 is a front view of a maintenance device for a screw extruder according to the present invention;

FIG. 4 is a perspective view of a heavy piece of a maintenance device for a screw extruder according to the present invention;

FIG. 5 is a plan view of a press plate of a maintenance device for a screw extruder according to the present invention;

FIG. 6 is a sectional view taken along line B-B of FIG. 5;

FIG. 7 is a front view of a screw extruder with a shaft mounted to a platen of a maintenance device according to the present invention;

FIG. 8 is a cross-sectional view taken along line C-C of FIG. 7;

FIG. 9 is a schematic view showing a connection structure between a second T-shaped sliding block, a second T-shaped groove and a sliding support rod of the maintenance device for the screw extruder according to the present invention;

FIG. 10 is a perspective view of the connection of the rear support plate and the supporting plate of the maintenance device for screw extruder according to the present invention;

FIG. 11 is a perspective view of the connection between the holding plate and the connecting block of the maintenance device for screw extruder according to the present invention;

FIG. 12 is a perspective view of the interconnection between the pulling box, the lifting device and the base of the maintenance device for a screw extruder of the present invention;

FIG. 13 is a front view of the interconnection between the pulling box, the lifting device and the base of the maintenance device for a screw extruder of the present invention;

FIG. 14 is a side view of the interconnection between the pulling box, the lifting device and the base of a maintenance device for a screw extruder according to the present invention;

FIG. 15 is a perspective view of a maintenance device for a screw extruder according to the present invention with a lifter plate disposed in a drawer box;

fig. 16 is a front view of a screw extruder in which a lifter plate is provided in a drawer box of a maintenance device according to the present invention.

In the figure: 1-base, 101-second T-shaped groove, 102-slideway, 2-fixing frame, 201-vertical frame, 202-top plate, 3-pressure device, 301-pressure plate, 302-pressure supply device, 303-first T-shaped groove, 304-first T-shaped sliding block, 411-rear vertical supporting rod, 412-rear supporting plate, 421-front vertical supporting rod, 422-hinge frame, 423-front supporting plate, 424-second T-shaped sliding block, 425-sliding supporting rod, 430-frame supporting plate, 440-connecting sliding block, 5-lifting device, 6-pulling box, 601-slot, 7-wheel, 8-rib plate, 9-stop block, 10-pulley, 11-pull rope, 12-shaft part, 1201-conical concave hole, 13-weight block, 1301-through holes, 1302-fastening bolts, 14-springs, 15-lifting plates, 16-inserting plates, 17-handles, 18-Z-shaped plates, 19-lifting equipment and 20-n-shaped frames.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 and 3, a maintenance device for a screw extruder includes a base 1, a fixing frame 2, a pressure device 3, a holding frame, a lifting device 5, and a pulling box 6 with an opening at the upper end.

As shown in fig. 1, 2 and 3, the fixed frame 2 is composed of two vertical frames 201 vertically arranged on the base 1 and a top plate 202 horizontally arranged on the upper parts of the two vertical frames 201, the top plate 202 is supported on the vertical frames 201 through rib plates 8, four rib plates 8 are arranged, two ends of the top plate 202 are symmetrically provided, the rib plate 8 is composed of a vertical section and an inclined section connected with the vertical section, the vertical section of the rib plate 8 is connected on the vertical frame 201 through a bolt, the upper end of the vertical section of the rib plate 8 is supported on the lower end surface of the top plate 202, one end of the inclined section of the rib plate 8 is connected with the lower part of the vertical section, the other end is connected with the lower end surface of the top plate 202, the connecting position is close to the middle part of the lower end face of the top plate 202, the upper ends of the two ends of the top plate 202 are provided with stop blocks 9, the lower ends of the stop blocks 9 are tightly connected with the upper end of the top plate 202, and the stop blocks 9 are installed on the vertical frame 201 through bolts and are in one-to-one correspondence with the vertical sections of the rib plates 8; the top plate 202 is supported on the upper portion of the upright frame 201 through the four rib plates 8 and the four stop blocks 9, and does not need to be welded with the upright frame 201, the rib plates 8 and the stop blocks 9 are connected to the upright frame 201 through bolts, so that the height of the top plate 202 on the upright frame 201 can be adjusted according to actual use requirements, and meanwhile, the top plate 202 can be conveniently detached on the upright frame 201.

As shown in fig. 2 and 3, the pressure device 3 includes a pressure plate 301 and a pressure supply device 302, the pressure supply device 302 is disposed on an upper end surface of the pressure plate 301, the pressure supply device 302 may be a hydraulic cylinder, an air cylinder, an electric cylinder or a hydraulic jack, and a corresponding hydraulic system and an air pressure system need to be configured when the hydraulic cylinder and the air cylinder are selected, so that the structure of the present invention is complex, the manufacturing cost is high, and the electric cylinder or the hydraulic jack is preferably selected; the cross section of the vertical frame 201 is n-shaped, the openings of the two vertical frames 201 are arranged in opposite directions, the upper ends of the two vertical frames 201 are respectively provided with an n-shaped frame 20, the opening directions of the n-shaped frame 20 and the vertical frames 201 are opposite, and the n-shaped frame 20 and the upper ends of the vertical frames 201 are respectively and vertically provided with a pulley 10 to form a pulley block; two ends of a pressing plate 301 extend into openings of the two vertical frames 201, the pressing plate 301 can move up and down along the vertical frames 201 through the two ends of the pressing plate 301, the two ends of the pressing plate 301 are respectively connected with a pull rope 11, the other ends of the two pull ropes 11 respectively penetrate through two pulleys 10 of a pulley block and then are connected with a weight device, the pressing plate 301 is pulled up through the pull ropes 11 by the weight device, and a shaft-shaped part 12 is arranged at the lower end of the pressing plate 301; when the electric cylinder or the hydraulic jack is used for providing pressure, the extension rod of the electric cylinder or the hydraulic jack supports against the top plate 202, and along with continuous extension of the output rod of the electric cylinder or the hydraulic jack, the base of the electric cylinder or the hydraulic jack applies downward pressure to the pressing plate 301 to drive the pressing plate 301 to move downwards and simultaneously drive the weight device to move upwards, and the pressing plate 301 drives the shaft-shaped part 12 to press downwards to complete the maintenance task of dismantling the damaged bearing and the damaged screw rod. After the pressing is finished, if the electric cylinder is used, the extension rod of the electric cylinder retracts through the controller of the electric cylinder, meanwhile, the weight device automatically lifts the pressing plate 301 upwards through the pull rope 11 and the pulley 10, so that the top end of the output rod of the electric cylinder is always propped against the top plate 202, and a maintenance space is automatically reserved for the next maintenance; if the hydraulic jack is used, an oil return valve of the hydraulic jack is opened, the press plate 301 is automatically lifted upwards by the weight device through the pull rope 11 and the pulley 10, an extension rod of the hydraulic jack is pressed back, the press plate 301 is automatically lifted to the initial pressing position, and a maintenance space is automatically reserved for next maintenance.

As shown in fig. 4, the weight device includes a weight block 13, the weight block 13 is a rectangular parallelepiped structure, a plurality of rectangular parallelepiped through holes 1301 horizontally arranged are arranged on the weight block 13 along the vertical direction, the volumes of the through holes 1301 are different from each other, threaded through holes communicated with the through holes 1301 in a one-to-one correspondence manner are arranged on the weight block 13, fastening bolts 1302 are arranged on the threaded through holes, and the weight device can be used for increasing or decreasing the mass of the weight device by placing iron blocks into the through holes 1301 or taking away the iron blocks placed into the through holes 1301, so that the weight device is suitable for electric cylinders or hydraulic jacks with different weights; if the weight of the weight device is too large, more energy is consumed in the using process of the electric cylinder or the hydraulic jack; if the weight of the weight device is too small, the weight device cannot lift the pressure device 3, the top end of the extension rod of the electric cylinder or the hydraulic jack cannot abut against the top plate 202, and the electric cylinder or the hydraulic jack does not function. The through holes 1301 with different volumes are suitable for placing iron blocks with different volumes, so that the mass of the weight device can be more finely adjusted; the bearing of the gear box is maintained for a long time, the surface of an iron block which can inevitably increase the weight of the heavy device is stained with some lubricating oil, and the iron block can be prevented from falling out of the through hole 1301 to injure maintenance personnel through the action of the fastening bolt 1302.

When the pressure supply device 302 needs to be replaced due to damage or improper stroke, the weight of the weight device can be manually reduced, the pressure device 3 falls down, and the pressure supply device 302 is convenient to replace.

As shown in fig. 5, 6, 7 and 8, a first T-shaped groove 303 is formed on the lower end surface of the pressing plate 301 along the length direction of the pressing plate 301, a first T-shaped slider 304 is formed in the first T-shaped groove 303, the first T-shaped slider 304 can slide freely in the first T-shaped groove 303, the upper end of the shaft-shaped member 12 is connected to the lower end surface of the first T-shaped slider 304, a groove leading from the side edge of the pressing plate 301 to one end of the first T-shaped groove 303 is formed on the lower end surface of the pressing plate 301, the groove is used for mounting and dismounting the first T-shaped slider 304, when different gear boxes and different screws are damaged, the damaged member is mounted on the mounting frame and then the distance from the pressing end of the damaged member to the pressing plate 301 is different, in order to effectively use the stroke of the pressure supply device 302, the distance from the lower end of the shaft-shaped member 12 to the pressing end of the required maintenance member is as short as possible, the shaft-shaped member 12 and the first T-shaped slider 304 with different heights can be made in series, selecting according to the requirement; the lower end face of the shaft-shaped part 12 is provided with a conical concave hole 1201, the area of the cross section of the upper end of the conical concave hole 1201 is smaller than that of the cross section of the lower end, after a screw rod of the extruder is broken, the broken screw rod needs to be taken out, due to the adhesion effect of solidified plastics, a wear-resistant sleeve lined in a machine barrel is usually taken out when the screw rod is taken out, the sleeve still has use value, serious material waste can be caused when the sleeve is directly used as a waste material along with the screw rod for treatment, the screw rod needs to be extruded from the sleeve, when the device is used for maintenance, the broken end of the screw rod has various shapes and is not suitable for being used as a pressure-bearing end, the tip of the screw rod is used as the pressure-bearing end, and the pressure exerted on the screw rod by the pressure device 3 can be uniform by extending into the conical concave hole 1201, so that the pressure deviation is avoided.

As shown in fig. 1, 3, 9, 10 and 11, the rack support comprises a rear support rack, a front support rack and two rack support plates 430 arranged at the upper ends of the rear support rack and the front support rack, the rear support rack and the front support rack are respectively arranged at two sides of the fixed rack 2, the rear support rack is composed of a plurality of rear vertical support rods 411 vertically arranged on the base 1 and a rear support plate 412 arranged at the upper ends of the plurality of rear vertical support rods 411, the front support rack comprises two front vertical support rods 421, the two front vertical support rods 421 are respectively arranged at two ends of the base 1, the pulling box 6 can pass between the two front vertical support rods 421, the upper ends of the two front vertical support rods 421 are respectively and fixedly connected with a hinge bracket 422, and each hinge bracket 422 is hinged with a front support plate 423; a second T-shaped groove 101 is formed in the upper end face, located between the two front vertical support rods 421, of the base 1, a second T-shaped sliding block 424 is arranged in the second T-shaped groove 101, the second T-shaped sliding block 424 can freely slide in the second T-shaped groove 101, a sliding support rod 425 is vertically arranged at the upper end of the second T-shaped sliding block 424, the free ends of the two front support plates 423 can be simultaneously arranged at the upper end of the sliding support rod 425, the upper end faces of the rear support plate 412 and the front support plates 423 are located on the same horizontal plane at the moment, a groove leading from the side edge of the bottom plate 1 to the second T-shaped groove 101 is formed in the upper end face of the bottom plate 1, and the groove is used for installing and detaching the second T-shaped sliding block 424; when the pulling box 6 is taken out, the two front support plates 423 are rotated to the vertical position through the hinge bracket 422, the sliding support rod 425 is communicated with the second T-shaped slide block 424 and taken out from the second T-shaped groove 101, and then the pulling box 6 can be pulled out. Be provided with rectangular form recess 413 on the up end of back backup pad 412, be provided with link block 440 in the rectangular form recess 413, link block 440 is cylindricly, and its diameter is the same with rectangular form recess 413's width, link block 440's upper end is fixed continuous with the one end of putting up holding plate 430, hold plate 430's relative position through changing two framves, can be used to put up the part of the required maintenance of holding equidimension not, it can rotate for the axle by cylindric link block 440 to put up holding plate 430, form different contained angles, make it can support the scope wider.

As shown in fig. 12, 13, 14 and 16, at least two wheels 7 are respectively arranged on two sides of the pulling box 6, a group of mutually parallel slideways 102 are arranged on the bottom plate 1, the wheels 7 are arranged in the slideways 102, and the pulling box 6 can be pulled out from the base 1 along the slideways 102 by the wheels 7; a damping structure is arranged in the pulling box 6, the damping structure of the pulling box 6 comprises springs 14 and a lifting plate 15, a plurality of spring placing grooves are formed in the upper end face of the bottom wall of the pulling box 6, the springs 14 are placed in the spring placing grooves in a one-to-one correspondence mode, the lifting plate 15 is placed on the springs 14, a rubber layer is arranged on the upper end face of the lifting plate 15, a rubber layer is arranged on the inner side face of the box wall of the pulling box 6, when the damage fault of the bearing of the gearbox of the extruder is maintained, a shaft provided with the damaged bearing after maintenance is completed can fall on the lifting plate 15, and under the action of the springs 14 and the rubber layer on the upper end face of the lifting plate 15, the shaft can be protected, and the shaft end is prevented from being damaged when contacting hard objects; the shaft falls down and is toppled, and the rubber layer arranged on the inner side surface of the wall of the pulling box 6 can protect the author, so that the shaft and parts on the shaft can be prevented from being damaged.

As shown in fig. 1, 12 and 15, one side of the pulling box 6 close to the front support frame is not provided with a box body wall, one end of each of two box body side walls of the pulling box 6 adjacent to the side is vertically provided with a slot 601, an insert plate 16 is arranged in each slot 601, the outer side surface of each insert plate 16 is provided with a handle 17, the pulling box 6 can be pulled out or pushed back through the handle 17 and the insert plate 16 can be taken out or inserted back, the inner side surface of each insert plate 16 is provided with a rubber layer, and the rubber layer has the same function as the rubber layer arranged on the inner side surface of the box wall of the pulling box 6; after the pulling box 6 is pulled out, the inserting plate 16 is taken down, the part needing to be maintained is lifted and placed on the lifting plate 15, and the part needing to be maintained does not need to be lifted over the top end of the pulling box 6 or the inserting plate 16 and then placed on the lifting plate 15, so that the labor intensity is reduced, and the maintenance is safer.

As shown in fig. 12, 14, 15 and 16, rectangular notches 602 are vertically formed in two side walls of the pulling box 6 on which the wheels 7 are mounted, and the rectangular notches 602 extend from the top end of the wall of the pulling box 6 to below the lifting plate 15; the lifting device 5 comprises a Z-shaped plate 18 and a lifting device 19, the lifting device 19 can be a hydraulic cylinder, an air cylinder, an electric cylinder or a jack, the width of the Z-shaped plate 18 is slightly smaller than that of the rectangular notch 602, the upper end face of the lower end transverse part of the Z-shaped plate 18 is connected with the lower end face of the lifting plate 15, the upper end transverse part of the Z-shaped plate 18 penetrates through the rectangular notch 602 and extends out of the pulling box 6, when the pulling box 6 is pushed to the innermost end, the upper end transverse part of the Z-shaped plate 18 is located above an extension rod of the lifting device 19, the Z-shaped plate 18 can be jacked up through the lifting device 19, the lifting plate 15 and a component to be maintained placed on the lifting plate 15 are jacked up together, and the component to be maintained can be supported on the two supporting plates 430 in a labor-saving and convenient mode.

The use method and the working principle of the invention are as follows:

1. the tail end of a screw rod of a screw extruder is usually arranged at one end of a main shaft of a gear box of the extruder, the screw rod can bear the reaction force of materials to be extruded during extrusion work and can simultaneously bear the action of axial force and radial force, so that the main shaft for installing the screw rod can also simultaneously bear the action of the axial force and the radial force, one end of the main shaft for installing the screw rod, which is close to the installation screw rod, is usually provided with a thrust roller bearing, the thrust roller bearing is the most vulnerable component in the gear box of the extruder, the damage mode mainly comprises that a retainer for installing rollers is damaged and an inner ring which is matched and connected with the main shaft of the gear box is damaged, the damage of the inner ring is usually the damage of the outer end of the inner ring, the inner ring and the inner end matched with the main shaft are still tightly hooped on the main shaft, at the moment, the inner ring needs to be taken down from the main shaft, two front supporting plates firstly rotate to the vertical position through a hinging frame 423 during maintenance, then the sliding support rod 425 is communicated with the second T-shaped sliding block 424 and taken out of the second T-shaped groove 101 together, then the pulling box 6 is pulled out, the inserting plate 16 is taken down, the main shaft with the damaged thrust roller bearing is placed on the lifting plate 15 in the pulling box 6, the inserting plate 16 is inserted back, then the pulling box 6 is pushed back to the lower part of the pressure device 3, and because the pulling box 6 is provided with wheels, even if the main shaft and the parts such as the gears and the like arranged on the main shaft are high in mass, the pulling box 6 can still be pushed back to the lower part of the pressure device 3 in a labor-saving manner; installing a second T-shaped sliding block 424 and a sliding supporting rod 425, laying two front supporting plates 423, separating two clamping plates 430 by a distance of one end which is large enough, then jacking up a Z-shaped plate 18 through a lifting device 19 of a lifting device 5, jacking up the lifting plate 15 and a part which is placed on the lifting plate 15 and needs to be maintained, generally dismantling a gear on a main shaft, stopping continuous extension of an extension rod of the lifting device 19 when the lower end surface of the gear is higher than the upper end surface of the frame supporting plate 430, moving the two frame supporting plates 430 to the positions below two ends of the gear, then withdrawing the extension rod of the lifting device 19, and erecting the main shaft through the gear by the frame supporting plate 430; and replacing the first T-shaped sliding block 304 provided with the shaft-shaped part 12 with proper height, enabling the shaft-shaped part 12 to face the main shaft, enabling the outer diameter of the shaft-shaped part 12 to be smaller than the diameter of the upper end of the main shaft, starting the pressure supply device 302 to drive the shaft-shaped part 12 to press down the upper end of the main shaft, finally enabling the main shaft to fall on the lifting plate 15 under the action of the pressure supply device 302, then taking off the gear, separating the two clamping plates 430 by a sufficient distance at one end, lifting the lifting plate 15 again, stopping the continuous extension of the extension rod of the lifting device 19 when the lower end surface of the inner ring of the damaged bearing is higher than the upper end surface of the clamping plates 430, moving the two clamping plates 430 to be below two ends of the inner ring of the damaged bearing, and removing the inner ring of the damaged bearing by the same steps as gear removal.

2. When a broken screw is detached from a sleeve connected with the screw through solidified plastic, the tip end of the screw is upward, two support plates 430 are used for supporting two ends of the lower end of the sleeve respectively, then the shaft-shaped part 12 is slowly pressed downwards, meanwhile, the first T-shaped sliding block 304 slides in a proper amount, the conical concave hole 1201 is uniformly sleeved outside the tip end of the screw, then the screw is continuously pressed downwards, the broken screw is pressed out from the sleeve, the solidified plastic can be taken out due to the action of the spiral part on the outer wall of the screw when the screw is pressed out, and the sleeve can be installed into an extruder for continuous use.

In conclusion, the invention can be used for maintaining the faults of the damage of the bearing of the gearbox of the extruder and the breakage of the screw, and the hard beating is not needed in the maintenance process, thereby reducing the labor intensity and the maintenance time of the maintenance and saving the labor cost required by the maintenance; in the maintenance process, undamaged parts on the maintained parts can not be damaged, and the sleeve connected with the broken screw can be recycled, so that the waste of materials is avoided.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a screw extruder is with maintenance device, includes base (1), mount (2) and pressure device (3), its characterized in that: the device is characterized by further comprising a holding frame, a lifting device (5) and a pulling box (6) with an upper end opening, wherein the fixing frame (2) is vertically arranged on the base (1), the pressure device (3) is arranged on the fixing frame (2) and can move up and down along the fixing frame (2), the pressure device (3) is used for providing downward pressure, the holding frame is arranged on the base (1) and is used for supporting a part to be maintained at a certain height, the pulling box (6) is arranged on the base (1), wheels (7) are arranged on the pulling box (6), the pulling box (6) can be pulled out from the base (1) through the wheels (7), a damping structure is arranged in the pulling box (6), the lifting device (5) is arranged below the pressure device (3) and is arranged on two sides of the pulling box (6), the lifting device (5) is used for lifting a part to be repaired, which is placed in the pulling box (6), to a certain height so as to be placed on the holding frame;

the fixing frame (2) is composed of two vertical frames (201) vertically arranged on the base (1) and a top plate (202) horizontally arranged at the upper parts of the two vertical frames (201), the top plate (202) is supported on the vertical frames (201) through rib plates (8), the number of the rib plates (8) is four, two ends of the top plate (202) are symmetrically arranged, the rib plates (8) are composed of vertical sections and inclined sections connected with the vertical sections, the vertical sections of the rib plates (8) are connected to the vertical frames (201) through bolts, the upper ends of the vertical sections of the rib plates (8) are supported on the lower end face of the top plate (202), one ends of the inclined sections of the rib plates (8) are connected with the lower parts of the vertical sections of the rib plates, the other ends of the inclined sections of the rib plates are connected with the lower end face of the top plate (202), and the connected positions of the inclined sections of the rib plates (8) are close to the middle parts of the lower end faces of the top plate (202); the upper ends of the two ends of the top plate (202) are provided with stop blocks (9), the lower ends of the stop blocks (9) are tightly connected with the upper end of the top plate (202), and the stop blocks (9) are installed on the vertical frame (201) through bolts and are arranged in one-to-one correspondence with the vertical sections of the rib plates (8);

the rack support comprises a rear support frame, a front support frame and two rack support plates (430) arranged at the upper ends of the rear support frame and the front support frame, the rear support frame and the front support frame are respectively arranged at two sides of the fixed frame (2), the rear support frame is composed of a plurality of rear vertical support rods (411) vertically arranged on the base (1) and a rear support plate (412) arranged at the upper ends of the plurality of rear vertical support rods (411), the front supporting frame comprises two front vertical supporting rods (421), the two front vertical supporting rods (421) are respectively arranged at two ends of the base (1), the pulling box (6) can pass through two front vertical supporting rods (421), the upper ends of the two front vertical supporting rods (421) are respectively and fixedly connected with a hinge frame (422), and each hinge frame (422) is hinged with a front supporting plate (423); a second T-shaped groove (101) is formed in the upper end face, located between the two front vertical supporting rods (421), of the base (1), a second T-shaped sliding block (424) is arranged in the second T-shaped groove (101), the second T-shaped sliding block (424) can freely slide in the second T-shaped groove (101), a sliding supporting rod (425) is vertically arranged at the upper end of the second T-shaped sliding block (424), the free ends of the two front supporting plates (423) can be simultaneously arranged at the upper end of the sliding supporting rod (425), the upper end faces of the rear supporting plate (412) and the front supporting plate (423) are located on the same horizontal plane, a groove leading to the second T-shaped groove (101) from the side edge of the base (1) is formed in the upper end face of the base (1), and the groove is used for installing and dismantling the second T-shaped sliding block (424); the upper end surface of the rear supporting plate (412) is provided with a long-strip-shaped groove (413), a connecting sliding block (440) is arranged in the long-strip-shaped groove (413), the connecting sliding block (440) is cylindrical, the diameter of the connecting sliding block is the same as the width of the long-strip-shaped groove (413), and the upper end of the connecting sliding block (440) is fixedly connected with one end of the supporting plate (430);

the pressure device (3) comprises a pressure plate (301) and a pressure supply device (302), wherein the pressure supply device (302) is arranged on the upper end face of the pressure plate (301); the cross section of each vertical frame (201) is n-shaped, the openings of the two vertical frames (201) are oppositely arranged, the upper ends of the two vertical frames (201) are respectively provided with an n-shaped frame (20), the opening directions of the n-shaped frame (20) and the vertical frames (201) are opposite, and the n-shaped frame (20) and the upper ends of the vertical frames (201) are respectively and vertically provided with a pulley (10) to form a pulley block; two ends of the pressing plate (301) are respectively connected with a pull rope (11), the other ends of the two pull ropes (11) respectively penetrate through two pulleys (10) of a pulley block and then are connected with a weight device, and the pressing plate (301) is pulled up by the weight device through the pull ropes (11); the lower end of the pressure plate (301) is provided with a shaft-shaped part (12);

the weight device comprises a weight block (13), wherein the weight block (13) is of a cuboid structure, a plurality of horizontally arranged cuboid through holes (1301) are formed in the weight block (13) in the vertical direction, the through holes (1301) are different in size, threaded through holes communicated with the through holes (1301) in a one-to-one correspondence mode are formed in the weight block (13), and fastening bolts (1302) are arranged on the threaded through holes.

2. The maintenance device for the screw extruder according to claim 1, wherein: the pressure supply device (302) can be a hydraulic cylinder, an air cylinder, an electric cylinder or a hydraulic jack.

3. The maintenance device for the screw extruder according to claim 1, wherein: a first T-shaped groove (303) is formed in the lower end face of the pressing plate (301) along the length direction of the pressing plate (301), a first T-shaped sliding block (304) is arranged in the first T-shaped groove (303), the first T-shaped sliding block (304) can freely slide in the first T-shaped groove (303), the upper end of the shaft-shaped part (12) is connected to the lower end face of the first T-shaped sliding block (304), a conical concave hole (1201) is formed in the lower end face of the shaft-shaped part (12), and the area of the cross section of the upper end of the conical concave hole (1201) is smaller than that of the cross section of the lower end of the conical concave hole (1201); the lower end face of the pressing plate (301) is provided with a groove communicated to one end of the first T-shaped groove (303) from the side edge of the pressing plate (301), and the groove is used for installing and disassembling the first T-shaped sliding block (304).

4. A screw extruder maintenance device according to any one of claims 1 to 3, wherein: at least two wheels (7) are respectively arranged on two sides of the pulling box (6), a group of mutually parallel slideways (102) are arranged on the base (1), and the wheels (7) are arranged in the slideways (102); the damping structure of the pulling box (6) comprises springs (14) and a lifting plate (15), a plurality of spring placing grooves are formed in the upper end face of the bottom wall of the pulling box (6), the springs (14) are placed in the spring placing grooves in a one-to-one correspondence mode, the lifting plate (15) is placed on the springs (14), a rubber layer is arranged on the upper end face of the lifting plate (15), and a rubber layer is arranged on the inner side face of the box wall of the pulling box (6).

5. The maintenance device for the screw extruder according to claim 4, wherein: one side that draws case (6) to be close to front support frame does not set up the box body wall, and the one end that is close to this side on two box lateral walls that draw case (6) adjacent this side respectively vertically is provided with a slot (601), be provided with picture peg (16) in slot (601), be provided with handle (17) on the lateral surface of picture peg (16), be provided with the rubber layer on the medial surface of picture peg (16).

6. The maintenance device for the screw extruder according to claim 5, wherein: rectangular notches (602) are vertically formed in two side walls of the pulling box (6) provided with the wheels (7), and the rectangular notches (602) extend to the lower part of the lifting plate (15) from the top end of the box wall of the pulling box (6); hoisting device (5) are including Z shaped plate (18) and jacking equipment (19), the width of Z shaped plate (18) slightly is less than the width of rectangle breach (602), the up end of the horizontal portion of Z shaped plate (18) lower extreme links to each other with the lower terminal surface of jacking plate (15), the horizontal portion in upper end of Z shaped plate (18) passes rectangle breach (602) and stretches out to the outside of drawing case (6), and when drawing case (6) propelling movement to innermost the time Z shaped plate (18) upper end horizontal position is in the top of jacking equipment (19) lift end.