CN214600052U - Horizontal roller coating unit - Google Patents

Abstract

The utility model relates to a horizontal roller coat unit, the roller coater includes the frame, go up first dolly, install the first of scribbling on last first dolly, scribble first dolly down and install the head of scribbling down on first dolly, at the other roller change device that has arranged of upper portion dolly track, the roller change device includes at least a set of trailing arm roll change mechanism, trailing arm roll change mechanism includes trailing arm and trailing arm drive unit, be equipped with the bearing portion that is used for holding in the palm and protects the roller of scribbling on the trailing arm, trailing arm drive unit drive trailing arm moves between roll change position and standby position, at roll change position, bearing portion holds old roller or makes new roller be in the target location. The utility model discloses a arrange the roll change device by the roller coater, protect the effect with the help of the support of trailing arm, can assist the roll change operation of accomplishing the upper roll, reduce the degree of difficulty that maintainer changed the upper roll effectively, reduce maintainer's work load and shorten the activity duration.

Description

Horizontal roller coating unit

Technical Field

The utility model belongs to the technical field of the metallurgical equipment, concretely relates to horizontal roller coat unit.

Background

The roller coater has the advantages of high film thickness control precision, high coating liquid viscosity adaptability and the like, and is widely applied to cold-rolled strip steel processing units such as color coating, galvanizing and silicon steel coating fields. The horizontal double-sided roller coater is applied to a plurality of units with horizontally running strip steel due to small occupied area, namely, two coating heads are arranged on a single set of roller coater, the upper coating head is positioned above the strip steel, and the upper surface of the strip steel is coated; the lower coating head is positioned below the strip steel and coats the lower surface of the strip steel; each coating head is provided with a coating liquid disc for dipping coating. Each coating roller is provided with a coating roller driving system, and the roller rotating speed and the coating film thickness are controlled.

Because the coating rolls are prone to wear and require replacement, roll coaters must be frequently switched between a work station and a maintenance station. Conventionally, an operator pulls the coating head trolley by hand to reciprocate between a working position and a maintenance position, so that the efficiency is low and the risk coefficient is high. After the roll coater reaches the maintenance position, an operator usually sleeves the steel wire rope on the shaft necks at the two ends of the coating roller and then lifts the coating roller by a crane for replacement. The coating roller of the lower coating head is easy to operate, but the coating roller of the upper coating head needs to avoid the frame of the upper coating head trolley when the steel wire rope is sleeved, and after the sleeve is completed, the roller can be lifted and changed after the upper coating head trolley is driven into a working position (pushed by an operator), so that the operation is time-consuming and labor-consuming, and the labor intensity is high.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a horizontal roller coat unit can solve prior art's partial defect at least.

The utility model relates to a horizontal roller coat unit, including the roller coat machine, the roller coat machine include the frame, go up first dolly, install in go up first dolly on the last, down scribble first dolly and install in scribble first head under on the dolly, in correspond in the frame and be equipped with upper portion dolly track and lower part dolly track, upper portion dolly track extends to outside the frame, and in the other roll change device that has arranged of upper portion dolly track, the roll change device includes at least a set of bracket roll change mechanism, bracket roll change mechanism includes bracket arm and bracket drive unit, be equipped with the supporting part that is used for supporting the protection to scribble the roller on the bracket arm, the bracket drive unit drive the bracket moves between roll change position and standby position the roll change position, the supporting part holds in the old roller or makes the new roll be in the target location.

In one embodiment, the supporting arm driving unit includes a lifting driving structure for driving the supporting arm to lift and a supporting arm swinging driving structure for driving the supporting arm to swing in a horizontal plane.

In one embodiment, the two groups of supporting arm roll changing mechanisms are provided, and when the two supporting arms are located at the roll changing position, the two supporting parts respectively support roll shafts at two ends of the upper coating roll.

In one embodiment, the support portion is a V-shaped saddle.

In one embodiment, the upper applicator head carriage and/or the lower applicator head carriage is/are provided with a translational drive mechanism.

In one embodiment, the horizontal roller coating unit further comprises a coating roller driving mechanism for driving the coating roller to rotate, and the coating roller driving mechanism and the upper coating roller and the coating roller driving mechanism and the lower coating roller are connected through quick-opening couplers.

The utility model discloses following beneficial effect has at least:

the utility model provides a horizontal roller coat unit, through arranging the roll change device by the roller coater, with the help of the support guard action of trailing arm, can assist the roll change operation of accomplishing the upper roll, reduce the degree of difficulty that maintainer changed the upper roll effectively, reduce maintainer's work load and shorten the activity duration.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a horizontal roller coater unit according to an embodiment of the present invention;

FIG. 2 is a view from direction F of FIG. 1;

fig. 3 is a schematic structural diagram of a scraper device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the blade orientation under two working conditions of the new roller and the coping roller provided by the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention are described below clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example one

Referring to fig. 1 and 2, an embodiment of the present invention provides a horizontal roll coater unit, including a roll coater, the roller coater comprises a frame 1, an upper coating head trolley 21, an upper coating head 22 and a lower coating head trolley 31 which are arranged on the upper coating head trolley 21, and a lower coating head 32 which is arranged on the lower coating head trolley 31, wherein an upper trolley track and a lower trolley track are correspondingly arranged on the frame 1, the upper trolley track extends out of the frame 1, and a roll changing device is arranged beside the upper trolley track and comprises at least one group of supporting arm roll changing mechanisms, the supporting arm roll changing mechanism comprises a supporting arm 61 and a supporting arm driving unit, a supporting part for supporting and protecting the upper coating roll is arranged on the supporting arm 61, the supporting arm driving unit drives the supporting arm 61 to move between a roll changing position and a standby position, and in the roll changing position, the supporting part supports the old roll or enables the new roll to be at a target position.

As shown in fig. 1 and 2, the upper coating head 22 includes an upper roll frame and an upper coating roll mounted on the upper roll frame, wherein the upper roll frame is preferably hingedly mounted on an upper head carriage 21, which is driven to rotate about a hinge axis in a vertical plane to approach or separate from the strip running passage by means of a cylinder/cylinder or the like. Similarly, the lower coating head 32 comprises a lower roll stand and a lower coating roll mounted on the lower roll stand, wherein the lower roll stand is preferably hingedly mounted on a lower coating head carriage 31 which is driven by a cylinder/cylinder or the like to rotate about a hinge axis in a vertical plane to approach or separate from the strip runway.

The upper coating head trolley 21 can be provided with a running unit such as a roller and the like so as to run on an upper trolley track; similarly, the lower head carriage 31 may be provided with a traveling unit such as a roller to travel on the lower carriage rail. Generally, the upper carriage rail and the lower carriage rail are guided in a direction parallel to the axial direction of the upper/lower coating rollers in order to guide the upper head carriage 21 and the lower head carriage 31 outside the frame 1. In a preferred embodiment, as shown in fig. 1 and 2, the upper coating head carriage 21 and/or the lower coating head carriage 31 are provided with a translation driving mechanism 4, and the translation driving mechanism 4 can adopt a conventional carriage driving mode, which is not described in detail herein; preferably, the upper coating head trolley 21 and the lower coating head trolley 31 are both provided with a translation driving mechanism 4; by configuring the translation driving mechanism 4, the workload of operators can be remarkably reduced, and the positioning precision of the trolley can be ensured, so that the equipment maintenance efficiency is effectively improved, and the maintenance cost and the maintenance danger are reduced.

Further, the horizontal roller coating unit further comprises a coating roller driving mechanism 5 for driving the coating roller to rotate so as to drive the upper coating roller and the lower coating roller to rotate, wherein the coating roller driving mechanism 5 is a conventional structure in the field and is not described herein again; based on the requirement that the upper coating head 22 and the lower coating head 32 need to be moved out of the rack 1 for maintenance, detachable connection structures are arranged between the coating roller driving mechanism 5 and the upper coating roller and between the coating roller driving mechanism 5 and the lower coating roller, in one embodiment, the coating roller driving mechanism 5 and the upper coating roller are connected through a quick-opening coupler 51, and the coating roller driving mechanism 5 and the lower coating roller are connected through the quick-opening coupler 51, so that quick-release quick connection between the coating roller driving mechanism 5 and a corresponding roller body can be realized, and the maintenance efficiency of the equipment is improved.

Alternatively, in the above-mentioned bracket arm roll-changing mechanism, the bracket arm 61 is arranged below the upper trolley track in a lifting manner, the bracket arm driving unit adopts a lifting driving device capable of driving the bracket arm 61 to lift, such as an air cylinder, a hydraulic cylinder or other structures, when the roll coater is in normal production, the bracket arm 61 is in a standby position, the standby position is located below the upper trolley track, and after the upper coating head trolley 21 moves to a predetermined maintenance position, the bracket arm 61 is driven by the bracket arm driving unit to lift to its roll-changing position, and its supporting part supports the roll to be changed. In another embodiment, the upper coating head carriage 21 is provided with a lifting table on which the upper coating head 22 is mounted and a lifting driving device for driving the lifting table to be lifted, and the above-mentioned supporting arm 61 may be fixedly mounted below the upper carriage rail or provided with a supporting arm 61 swing driving device for driving the supporting arm 61 to swing in a horizontal plane.

In this embodiment, preferably, the supporting arm driving unit includes a lifting driving structure 62 for driving the supporting arm 61 to lift and lower, and a supporting arm swinging driving structure 63 for driving the supporting arm 61 to swing and rotate in a horizontal plane; based on the structure, in the standby position, the lifting driving structure 62 drives the supporting arm 61 to descend to the lower limit position, and the supporting arm swinging driving structure 63 drives the supporting arm 61 to swing to deviate from the position right below the upper trolley track, for example, the arm extending direction of the supporting arm 61 is swung from the direction vertical to the axial direction of the upper coating roller to the direction parallel to the axial direction of the upper coating roller, so that the occupied space required by the roller changing device is reduced, more operable space and equipment operability are provided for maintenance personnel, and the interference of the supporting arm 61 on the movement of the upper coating head trolley 21, the lower coating head trolley 31 and the like is avoided.

The number of the supporting arm roll changing mechanisms can be a group, the supporting arm 61 can be designed to have a larger width (the width direction is parallel to the axial direction of the upper coating roll), two or more supporting parts are arranged on the supporting arm 61, and the supporting arm roll changing mechanisms can adopt a mode of only driving the supporting arm 61 to lift, and support roll shafts at two ends of the upper coating roll or directly support a roll body of the upper coating roll through the protruding supporting parts. In a preferred scheme, as shown in fig. 2, the roll changing device comprises two groups of supporting arm roll changing mechanisms, the two groups of supporting arm roll changing mechanisms are arranged at intervals along the axial direction of the upper coating roll, and when two supporting arms 61 are positioned at a roll changing position, two bearing parts respectively support roll shafts at two ends of the upper coating roll; the mode of holding the roller shafts at the two ends of the upper coating roller is adopted, the operation is reliable, the roller bodies can be prevented from being damaged due to the contact with the roller bodies of the upper coating roller or coating liquid on the upper coating roller is prevented from being bonded on the bearing parts, in addition, the two support arms 61 can be designed in a small mode, and particularly under the condition that the support arm swinging driving structure 63 is configured, the swinging motion of the support arms 61 is facilitated, and the support arms 61 can swing to the standby position and then cannot occupy the space between the upper trolley track and the lower trolley track. Of course, it is also feasible that the roll changing device comprises three or more groups of bracket arm roll changing mechanisms.

In one embodiment, the arm swing driving structure 63 includes a swing seat, and a conventional rotation driving device can be used to drive the swing seat to rotate, for example, via a motor + sprocket mechanism/pulley mechanism, etc., which will not be described in detail herein; the supporting arm 61 is connected with the output end of the lifting driving structure 62, and both are arranged on the swing seat, and the lifting driving structure 62 can adopt conventional lifting driving equipment such as an air cylinder, a hydraulic cylinder or a motor plus a screw rod mechanism; further, a guiding structure may be disposed on the swing seat to guide the lifting movement of the supporting arm 61, and the guiding structure may adopt a slider + slide rail type guiding manner or other guiding manners. In another embodiment, the lifting driving structure 62 includes a lifting base, which can be driven to lift by a conventional lifting driving device; the supporting arm 61 is connected with the output end of the supporting arm swinging driving structure 63, and both are arranged on the lifting seat, the supporting arm swinging driving structure 63 can adopt conventional rotating driving equipment, and the specific structure is not described herein.

The supporting part is preferably in a groove-shaped structure so as to stably and reliably support the upper coating roller; in one embodiment, as shown in FIG. 2, the bearing is a V-shaped saddle 611. Further preferably, the saddle 611 is rotatably disposed on the supporting arm 61 and the rotation axis thereof is parallel to the vertical direction, a saddle rotation driving unit may be disposed on the supporting arm 61, for example, a motor + transmission structure is adopted to drive the saddle 611 to rotate, the transmission structure may adopt a sprocket transmission structure, a gear transmission structure, a pulley transmission structure, etc., which is not described in detail herein, and further, an encoder may be configured for the motor of the saddle rotation driving unit; based on the structure, the swing angles of the two support arms 61 can be controlled to adapt to the replacement operation of the upper coating rollers with different lengths, the saddle 611 is driven to rotate by the saddle rotation driving unit to ensure that the corresponding rollers can be reliably supported, for example, when a plurality of roller coaters exist in a production line, the roller replacing device is designed to be a movable prying device structure (for example, all support arm roller replacing mechanisms are uniformly arranged on a roller replacing trolley), so that one set of roller replacing device can meet the roller replacing requirement of the plurality of roller coaters, the number of maintenance equipment is effectively reduced, and the cost is reduced.

Based on the structure of the horizontal roller coating unit, this embodiment further provides a roller changing method of the horizontal roller coating unit, where the method includes:

when the upper coating roller needs to be replaced, the method comprises the following steps:

(1) moving the upper coating head trolley 21 to a maintenance position, and driving the upper coating head trolley by a supporting arm driving unit to enable a supporting arm 61 to be in a roller changing position to support an old roller; before the upper coating head trolley 21 moves, the upper coating head trolley 21 is unlocked, and the connection between the quick-opening coupler 51 and the upper coating roller is released; after the upper coating head trolley 21 moves to the maintenance position, the upper coating head trolley 21 is locked; that is, the upper coating head trolley 21 has a self-locking structure to ensure that the upper coating head trolley 21 does not move on the upper trolley track;

(2) the coating roller bearing seat of the coating head 22 is opened, and the supporting arm 61 is driven to descend by the supporting arm driving unit;

(3) the upper coating head trolley 21 returns to a working position, and an old roller supported on the supporting arm 61 is lifted away; for example, an operator sleeves a steel wire rope on a roll shaft of the old roll and then lifts the old roll away by a crown block;

(4) the new roller is lifted to the supporting arm 61;

(5) moving the upper coating head trolley 21 to a maintenance position, driving the supporting arm 61 to be in a roll changing position by a supporting arm driving unit so as to enable a new roll to be in a target position, and completing the assembly of the new roll and a coating roll bearing seat;

(6) the supporting arm 61 is driven by the supporting arm driving unit to return to the standby position, and the upper coating head trolley 21 moves to the working position, so that normal production can be carried out.

When the lower coating roller needs to be replaced, the method comprises the following steps:

(1) moving the lower coating head trolley 31 to a maintenance position; before the lower coating head trolley 31 moves, the lower coating head trolley 31 is unlocked, and the connection between the quick-opening coupler 51 and the lower coating roller is released; after the lower coating head trolley 31 moves to the maintenance position, the lower coating head trolley 31 is locked; that is, the lower coating head trolley 31 has a self-locking structure to ensure that the lower coating head trolley 31 does not move on the lower trolley track;

(2) opening a coating roller bearing seat of the lower coating head 32 and hanging away the old roller; for example, an operator sleeves a steel wire rope on a roll shaft of the old roll and then lifts the old roll away by a crown block;

(3) hoisting the new roller to the roller bearing seat of the lower coating head 32 to complete the assembly of the new roller and the roller bearing seat;

(4) the lower coating head trolley 31 moves to a working position, and normal production can be carried out.

Example two

The embodiment of the utility model provides a scraper device can be applied to among the above-mentioned horizontal roller coat unit for clear away and go up and scribble the remaining impurity in roller and/or lower roller surface, this scraper device can arrange in frame 1, also can arrange on scribbling first dolly 21/scribble first dolly 31 down, carries out mounted position's affirmation according to the target cleaning roller.

As shown in fig. 3 and 4, the scraper device includes a scraper holder 100 and a scraper mounted at one end of the scraper holder 100, and the mounting of the scraper on the scraper holder 100 is a structure conventional in the art and will not be described herein; further, the scraper device further comprises an adjusting mechanism fixed on a mounting base (as described above, the adjusting mechanism may be the frame 1, or the upper coating head trolley 21/the lower coating head trolley 31) and used for adjusting the orientation of the scraper, the adjusting mechanism includes a horizontal driving unit and a lifting driving unit, the middle part and the other end of the scraper frame 100 are respectively provided with an adjusting slider, one of the adjusting sliders is connected with the output end of the horizontal driving unit, and the other adjusting slider is connected with the output end of the lifting driving unit.

The above-mentioned adjusting mechanism is used for adjusting the orientation of the blade so that the blade can perform work properly at a target position, including adjusting the line pressure between the blade and the coating roller 5, ensuring the uniformity of the contact pressure between the blade and the coating roller 5, and adjusting the tangent angle between the blade and the coating roller 5 to ensure the impurity removal effect of the blade. The tangent angle between the blade and the coating roller 5, that is, the included angle between the tangent line of the roller surface where the blade contacts the coating roller 5 and the blade surface of the blade, is defined in the same way, and will not be described again.

For convenience of description, an adjustment slider disposed at the center of the doctor holder 100 is defined as a center slider 102, and an adjustment slider disposed at the end of the doctor holder 100 is defined as an end slider 101. The middle slider 102 is slidably disposed on the doctor holder 100, and a middle slide rail is correspondingly disposed on the doctor holder 100; the end of the doctor blade holder 100 is preferably hinged to the end slider 101 with the axis of the hinge axis parallel to the width direction of the doctor blade holder 100, i.e., parallel to the axis of the coating roll 5; the end slider 101 may be slidably disposed on the mounting base, and an end slide rail may be disposed on the mounting base.

In one embodiment, as shown in fig. 3 and 4, the end slider 101 is connected to the output end of the horizontal driving unit, and the middle slider 102 is connected to the output end of the lifting driving unit; of course, it is also possible to connect the end slide 101 to the output of the lifting drive unit, and the middle slide 102 to the output of the horizontal drive unit.

According to the scraper device provided by the embodiment, the horizontal driving unit and the lifting driving unit are matched to adjust the position of the scraper, so that the linear pressure and the tangent angle between the scraper and the coating roller 5 meet the requirements, the automatic adjustment of the position of the scraper can be realized, the adjustment efficiency and the adjustment precision of the scraper can be obviously improved, the workload of maintenance personnel is reduced, the maintenance cost is reduced, and the maintenance safety is improved; the self-locking of the scraper position can be realized through the horizontal driving unit and the lifting driving unit, the working stability and the reliability of the scraper can be ensured, and meanwhile, the pressure fluctuation received in the operation of the scraper can be better dispersed to the horizontal driving unit and the lifting driving unit, so that the condition that the service life of the scraper and the coating roller 5 are reduced due to the hard contact of the traditional scraper is avoided.

In one embodiment, the horizontal driving unit and the lifting driving unit respectively adopt independent linear driving devices, such as an air cylinder, a hydraulic cylinder, an electric push rod and the like, and the action amplitude of the horizontal driving unit and the action amplitude of the lifting driving unit can be controlled through a central control computer end, so that the required scraper orientation adjusting effect is achieved. When the hydraulic cylinder is adopted, through the design of an oil path of the hydraulic cylinder, when the contact pressure between the scraper and the coating roller 5 exceeds a set threshold value, the pressure regulating loop and the unloading loop of the hydraulic cylinder act, so that on one hand, the load borne by a piston rod of the hydraulic cylinder is kept stable, and on the other hand, the contact pressure between the scraper and the coating roller 5 can be correspondingly kept in a normal range.

In another embodiment, as shown in fig. 3 and 4, the adjusting mechanism includes a screw elevator 601 and a matched elevator driving structure 602, one of the output shafts of the screw elevator 601 is axially horizontal and is configured as the horizontal driving unit, and the other output shaft of the screw elevator 601 is axially vertical and is configured as the elevator driving unit. The elevator driving structure 602 is a conventional device, for example, a motor + a speed reducer is adopted; the screw elevator 601 is a conventional device, and the detailed structure thereof is not described herein. Preferably, one end of the worm of the screw elevator 601 is connected to the elevator driving structure 602, and the other end is connected to the driving screw 603, the adjusting slider (i.e. the end slider 101) located at the end of the doctor holder 100 is screwed to the driving screw 603, i.e. the end slider 101 is provided with a nut, and the end slider 101 and the driving screw 603 form a screw mechanism; the other output shaft 604 of the screw rod elevator 601 (corresponding to the screw rod 604 of the screw rod elevator 601) is connected to the middle slide block 102, so as to drive the middle slide block 102 to move. Further preferably, as shown in fig. 3 and 4, the screw shaft of the screw lifter 601 is vertical, and the screw lifter 601 can drive the end slider 101 to move horizontally and drive the middle slider 102 to move up and down.

The adjustment of the direction of the scraper is completed by adopting a set of screw rod lifter 601, the required equipment quantity and equipment investment can be obviously reduced, the structure is simple, and the operation reliability is high; the requirements on installation space and operation space are relatively less, and the double-sided roller coater is particularly suitable for the conditions of compact layout and limited available space of equipment such as a double-sided roller coater.

As shown in fig. 4, based on the characteristics of the screw rod lifter 601, by designing the screw rod lifter 601 (i.e., setting the relationship between the translational driving amount of the screw rod mechanism and the translational amount of the screw rod in the worm-and-gear pair), after the translational movement of the end slider 101 and the translational movement of the middle slider 102 are combined, the scraper holder 100 is moved translationally in the direction perpendicular to the surface thereof (the scraper holder 100 may be a plate, i.e., in the direction perpendicular to the plate surface thereof, i.e., in the direction perpendicular to the scraper blade surface), i.e., the included angle between the scraper blade surface and the horizontal plane is constant. According to the scheme, the axes of the different coating rollers 5 coincide with the axes of the bearing seats when the coating rollers are installed, so that when the scraper frame 100 moves in the translation direction, the scraper frame can be always in contact with the coating rollers 5 at the set tangent angle, the tangent angle between the scraper device and the coating rollers 5 can be adjusted only when the scraper device is initially put into operation, and in the subsequent roller changing operation related to the maintenance process of the coating rollers 5, the tangent angle between the scraper and the coating rollers 5 does not need to be repeatedly adjusted, so that the equipment maintenance efficiency can be obviously improved, the workload of maintenance personnel is reduced, and the phenomenon that the normal operation of the scraper is influenced and the equipment is damaged due to misoperation possibly existing in the process of frequently adjusting the tangent angle between the scraper and the coating rollers 5 is avoided.

The embodiment of the utility model provides a use method of scraper device as above, include:

after the coating roller 5 is on line, the horizontal driving unit and the lifting driving unit are matched to adjust the orientation of the scraper, so that the line pressure and the tangent angle between the scraper and the coating roller 5 meet the requirements;

when roll changing is needed (as shown in fig. 4, after an initial new roll 51 is worn, roll thinning is needed to form a thinning roll 52 which is applied subsequently), the horizontal driving unit and the lifting driving unit are matched to adjust the direction of the scraper, so that the scraper is far away from the coating roll 5, and roll changing is convenient.

Wherein, preferably, the tangential angle between the doctor blade and the coating roller 5 is controlled in the range of 25 to 26, and the range of 25 to 26 can obtain the best impurity removing effect compared to other tangential angles.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides a horizontal roller coat unit, includes the roller coat machine, the roller coat machine include the frame, go up first dolly, install in go up first dolly on the last first dolly of scribbling, scribble first dolly down and install in scribble down and scribble the head under on the first dolly, in correspond in the frame and be equipped with upper portion dolly track and lower part dolly track, its characterized in that: the upper portion dolly track extends outside the frame, and in the roller change device has been arranged to upper portion dolly track side, the roller change device includes at least a set of trailing arm roll change mechanism, trailing arm roll change mechanism includes trailing arm and trailing arm drive unit, be equipped with the bearing portion that is used for supporting and protecting the upper coating roller on the trailing arm, trailing arm drive unit drive the trailing arm moves between roll change position and standby position the roll change position, old roller is held or new roller is in the target position to the bearing portion.

2. The horizontal roll coating unit of claim 1, wherein: the supporting arm driving unit comprises a lifting driving structure for driving the supporting arm to lift and a supporting arm swinging driving structure for driving the supporting arm to rotate and swing in a horizontal plane.

3. The horizontal roll coating unit of claim 1 or 2, wherein: the two groups of supporting arm roll changing mechanisms are arranged, and when the two supporting arms are located at the roll changing position, the two supporting parts respectively support roll shafts at two ends of the upper coating roll.

4. The horizontal roll coating unit of claim 1, wherein: the bearing part is a V-shaped saddle.

5. The horizontal roll coating unit of claim 1, wherein: the upper coating head trolley and/or the lower coating head trolley are/is provided with a translation driving mechanism.

6. The horizontal roll coating unit of claim 1, wherein: the coating roller driving mechanism is used for driving the coating roller to rotate, and the coating roller driving mechanism is connected with the coating roller through a quick-opening coupler.

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