A cotton harvester and its baling device, round bale wrapping device and method

Abstract

A cotton harvester and its baling device, circular wrapping film device, and method are disclosed. The cotton harvester includes a baling device, which includes a circular wrapping film device. The circular wrapping film device includes: a baling roller mounting frame installed at the lower part of the rear compartment of the baling device; a film roll storage rack installed at the rear side of the rear compartment of the baling device, on which the baling film rolls are placed; a film supporting mechanism including a film supporting frame and a film supporting cylinder, the front end of the film supporting frame being hinged to the baling roller mounting frame, and the rear end of the film supporting frame being connected to the baling roller mounting frame via the film supporting cylinder; a film feeding mechanism corresponding to the front lower baling roller of the baling device, and connected to the film supporting frame and the film roll storage rack respectively; a braking mechanism corresponding to the baling film roll installed on the film roll storage rack and connected to the baling film roll to brake the baling film roll intermittently forward; and a control mechanism connected to the film supporting, film feeding, and braking mechanisms respectively to control their corresponding actions. The present invention also discloses a circular wrapping film method.

Description

Technical Field

[0001] This invention relates to agricultural cotton harvesting machinery, particularly a point-braking progressive circular wrapping film device and method, as well as a baling device and cotton harvester having the same. Background Technology

[0002] Currently, circular balers are mostly used for baling hay and straw. The surface of the circular bale can be wrapped with film, netting, or rope. The ends of the circular bales of hay and straw are less likely to fall off. When wrapping with film or netting, the ends do not need to be edged, and the baling film or netting does not need to be advanced. When wrapping circular bales with film, netting, or rope, the film / net / rope is first fed into the baling chamber by a film feeding plate. The circular bale rotates on its own, wrapping the film / net / rope around it, and continuously drawing the film / net / rope in. Therefore, the linear velocity of the film / net / rope entering is synchronized with the linear velocity of the outer edge of the circular bale. When the film, netting, or rope has reached the preset number of wraps, it is cut by a special cutting device. The film / net / rope at the cut end relies on its own adsorption properties to connect, and the cut end of the circular bale is prone to detachment after wrapping with film / net / rope.

[0003] Existing cotton harvesters with seed cotton balers enable simultaneous cotton picking and baling, improving operational efficiency and reducing transportation costs. Compared to hay and straw, cotton is shorter, leading to cotton boll detachment at the bale ends, particularly around the outer edges. Therefore, the ends of the cotton bales need to be edged to reduce boll detachment. In this method, the baling film is fed in at a constant speed via a feeding mechanism. After entering the baling chamber and wrapping around the bale, the linear velocity of the front end of the baling film synchronizes with the linear velocity of the outer edge of the bale. The film's velocity remains constant under the action of the feeding mechanism, creating a velocity difference between the front and rear ends—the front end being faster than the rear end. This generates a progressive force, causing the baler to wrap around the bale and meet the baling requirements. However, this mechanism is complex and costly. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies of the prior art by providing a cotton harvester and its baling device, a round wrapping film device and method.

[0005] To achieve the above objectives, the present invention provides a circular wrapping film device, installed on the packing device of a cotton harvester, comprising:

[0006] A packing roller mounting bracket is installed in the lower part of the rear compartment of the packing device;

[0007] A film roll storage rack is installed on the rear side of the rear compartment of the packaging device, and the packaged film rolls are placed on the film roll storage rack;

[0008] The film support mechanism includes a film support frame and a film support cylinder. The front end of the film support frame is hinged to the packing roller mounting frame, and the rear end of the film support frame is connected to the packing roller mounting frame through the film support cylinder. The film support cylinder extends and retracts to drive the film support frame to rotate around the hinge point with the packing roller mounting frame.

[0009] The film feeding mechanism is provided corresponding to the front lower packing roller of the packing device and is connected to the film support frame and the film roll storage rack respectively;

[0010] A stop-braking mechanism, corresponding to the packaging film roll being installed on the film roll storage rack and connected to the packaging film roll, stops the packaging film roll intermittently, causing the packaging film to advance forward; and

[0011] The control mechanism is connected to the film-supporting mechanism, the film-feeding mechanism, and the intermittent braking mechanism respectively, so as to control the film-supporting mechanism, the film-feeding mechanism, and the intermittent braking mechanism to perform corresponding actions.

[0012] In the aforementioned circular wrapping film device, the film feeding mechanism includes a front pulley, a middle pulley, and a rear pulley. The front pulley is installed at the front end of the film support frame, the middle pulley is installed at the rear end of the film support frame, and the rear pulley is installed on the film roll storage rack. The front pulley is connected to the middle pulley via a front film feeding belt, and the rear pulley is connected to the middle pulley via a rear film feeding belt.

[0013] In the aforementioned circular wrapping film device, the front pulley and the rear pulley are both two-groove pulleys, the middle pulley is a four-groove pulley, the cross-section of the front film feeding belt and the rear film feeding belt is a triangular belt or a hexagonal belt, the front film feeding belt has 4-6 horizontally arranged strips, and the rear film feeding belt has 3-5 horizontally arranged strips.

[0014] In the aforementioned circular wrapping film device, the packing film roll includes a film roll mandrel and multiple packing films. Adjacent packing films are bonded together, and the multiple packing films are sequentially wound on the film roll mandrel. The front and rear ends of each packing film are trapezoidal. Each packing film has a separation signal label and a lift signal label at its front and rear ends, respectively. The width of the packing film is greater than the inner cavity width of the packing device.

[0015] In the aforementioned circular wrapping film device, the intermittent braking mechanism includes a film roll holding brake plate and an intermittent braking cylinder. One end of the film roll holding brake plate is hinged to the film roll storage rack, and the other end of the film roll holding brake plate is hinged to the intermittent braking cylinder. The intermittent braking cylinder extends and retracts at a set frequency to drive the film roll holding brake plate to hold and brake both ends of the film roll mandrel.

[0016] The aforementioned circular wrapping film device includes a control mechanism comprising a controller, a cotton film speed measuring roller, and a photoelectric through-beam sensor. The cotton film speed measuring roller is mounted on a film roll storage rack. A speed sensor is provided on the outer circumference of the speed measuring gear at one end of the cotton mold test roller. The photoelectric through-beam sensor is located below and in front of the packing film roll. The speed sensor and the photoelectric through-beam sensor are respectively connected to the controller. The controller is connected to the film-supporting cylinder and the intermittent braking cylinder, and controls the extension and retraction of the film-supporting cylinder according to the set cotton bale diameter signal. It also controls the extension and retraction of the intermittent braking cylinder according to the label signal of the packing film, the speed signal of the cotton film speed measuring roller, and the time signal detected by the photoelectric through-beam sensor.

[0017] In the aforementioned circular wrapping film device, the rear film feeding belt is always in contact with the cotton film speed measuring roller to prevent the wrapping film from being blown off.

[0018] In the aforementioned circular wrapping film device, the film support frame includes a film support plate, lifting lugs, upper film teeth, and a pulley mounting plate. The lifting lugs and upper film teeth are respectively installed at the front end of the film support plate. The pulley mounting plate is connected to the film support plate. The tooth shank of the upper film teeth is arc-shaped and concentric with the lower front packing roller of the packing device. The gap between the tooth shank and the packing strap on the lower front packing roller is 3-5mm.

[0019] To better achieve the above objectives, the present invention also provides a circular wrapping film method, comprising the following steps:

[0020] S100. The first sheet of the packing film roll is passed sequentially between the photoelectric through-beam sensors and between the cotton film speed measuring roller and the rear feeding film belt. The front end of the first sheet of the packing film is placed in the middle of the front feeding film belt, and the signal tag at the front end of the packing film is located between the photoelectric through-beam sensors.

[0021] S200. When the cotton bale in the baling device reaches the set diameter, the controller sends a control signal, the film support cylinder contracts to lift the film support frame, the baling film is clamped by the front feeding film belt and the baling belt, and under the action of friction, the baling film moves forward and enters the inner cavity of the baling device through the front lower baling roller.

[0022] S300, the portion of the packing film that is wider than the width of the cotton bale is flipped upwards by the flipping plate of the packing roller mounting frame;

[0023] S400. The packing film drives the cotton film speed measuring roller to rotate. When the speed sensor reaches a stable value, the intermittent braking cylinder is activated to extend or retract at a set frequency, pushing the film roll holding brake plate to intermittently brake the core shaft of the packing film roll, so that the packing film is intermittently moved forward.

[0024] S500, at the moment of being stopped by the hydraulic cylinder, the cotton bag tightens the packing film, and the folded-up parts at both ends of the packing film form a wrapping edge at both ends of the cotton bag;

[0025] S600: When the signal tag at the rear end of the packaged film roll passes the through-beam sensor, the point brake cylinder retracts and lifts the film roll brake plate.

[0026] S700, the signal tag at the front end of the next packing film roll passes through the through-beam sensor, the point brake cylinder extends to stop the film roll core shaft by the film roll holding brake plate, and separates the already wrapped first packing film from the next packing film.

[0027] S800, the front label of the next sheet of wrapping film stops at the photoelectric sensor, preparing for the next wrapping; and

[0028] S900, repeat steps S200-S800 until the packaging work is completed.

[0029] In the above-mentioned circular wrapping film method, the film roll storage rack is divided into upper and lower layers. The upper layer holds spare film rolls, and the packaged film rolls in use are placed in the lower layer. After the packaged film rolls are used up, they are removed, and the spare film rolls are placed in the lower working position of the film roll storage rack.

[0030] To better achieve the above objectives, the present invention also provides a packaging device, which includes the above-described circular wrapping film device and uses the above-described circular wrapping film method for packaging.

[0031] To better achieve the above objectives, the present invention also provides a cotton harvester, which includes the above-described packing device and uses the above-described circular wrapping method for packing.

[0032] The technical advantages of this invention are as follows:

[0033] The point-braking progressive circular wrapping film device of the present invention provides a new method of wrapping film after cotton roll is pressed and formed. The film roll is intermittently progressively advanced by the point-braking hydraulic cylinder. During the wrapping process, the wrapping film is tightened so that it is tightly wrapped around the surface of the cotton bale and the ends are wrapped, which facilitates the transportation of cotton. It has a simple structure, reliable operation and low manufacturing cost.

[0034] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a circular wrapping film device according to an embodiment of the present invention;

[0036] Figure 2A This is a top view of a packing roller mounting frame according to an embodiment of the present invention;

[0037] Figure 2B for Figure 2A AA section view;

[0038] Figure 3A This is a schematic diagram of the unfolded packaging film according to an embodiment of the present invention;

[0039] Figure 3B This is a schematic diagram of a membrane roll mandrel structure according to an embodiment of the present invention;

[0040] Figure 4A This is a schematic diagram of a film support frame structure according to an embodiment of the present invention;

[0041] Figure 4B for Figure 4A Side view.

[0042] Among them, the attached reference numerals

[0043] 1 Packaging device

[0044] 11 Front Warehouse

[0045] 12 rear warehouse

[0046] 13 packing straps

[0047] 14 front lower packing rollers

[0048] 2. Circular wrapping film device

[0049] 21 Packing Roller Mounting Frame

[0050] 211 External Mounting Plate

[0051] 212 Inner Mounting Plate

[0052] 213 Connecting beam

[0053] 214 Flip-up Plate

[0054] 215 Packaging Film Inlet

[0055] 22 Film delivery mechanism

[0056] 221 front pulley

[0057] 222 Front-feeding film belt

[0058] 223 Post-film conveyor belt

[0059] 224 pulley

[0060] 225 rear pulley

[0061] 23 Film Covering Mechanism

[0062] 231 film support frame

[0063] 2311 membrane sheet

[0064] 2312 upper membrane tooth

[0065] 2313 Pulley Mounting Plate

[0066] 2314 Hanging Ear

[0067] 232 film-supporting cylinder

[0068] 24-film roll storage rack

[0069] 241 pin

[0070] 25 packing rolls of film

[0071] 251 Packaging Film

[0072] 252 Separation Signal Tag

[0073] 253 Raise the signal tag

[0074] 254 film roll mandrel

[0075] 26-point braking mechanism

[0076] 261 Point Brake Cylinder

[0077] 262 diaphragm roll brake plate

[0078] 263 rollers

[0079] 27 Control mechanisms

[0080] 271 photoelectric through-beam sensor

[0081] 272 Cotton Film Speed ​​Measuring Roller

[0082] 273 speed sensor

[0083] 3 cotton bales Detailed Implementation

[0084] The structural and working principles of the present invention will be described in detail below with reference to the accompanying drawings:

[0085] The cotton harvester of the present invention includes a baling device 1, which comprises a front chamber 11, a rear chamber 12, a front lower baling roller, and a circular wrapping film device 2. The front chamber 11 and the rear chamber 12 together form a sealed chamber, and baling straps 13 are provided inside corresponding to the baling positions of the cotton bales 3. The circular wrapping film device 2 is located at the lower rear of the rear chamber 12 and connected to the front lower baling roller. The circular wrapping film device 2 can be installed on the outer wall of the rear chamber 12. Since the composition, structure, relative positions, connection relationships, and working principles of other parts of the cotton harvester and the baling device 1 can all adopt relatively mature existing technologies, they will not be described in detail here. Only the circular wrapping film device 2 and its circular wrapping film method will be described in detail below.

[0086] See Figure 1 , Figure 1This is a schematic diagram of the circular wrapping film device 2 according to an embodiment of the present invention. The circular wrapping film device 2 of the present invention is installed on the baling device 1 of a cotton harvester, comprising: a baling roller mounting frame 21, which can be bolted to the lower part of the rear compartment 12 of the baling device 1; the front lower baling roller 14 of the baling device 1 is mounted on the baling roller mounting frame 21; the baling film 251 enters the baling device 1 from the front lower baling roller 14 and wraps around the cotton bale 3; a film roll storage rack 24, which can be bolted to the rear side of the rear compartment 12 of the baling device 1; the baling film roll 25 is placed on the film roll storage rack 24, preferably with a two-layer structure, the upper layer for storing spare baling film rolls 25 and the lower layer for storing baling film rolls 25 in use; after the baling film roll 25 is placed in place, a pin 241 is used to prevent the film roll from falling off; rollers 263 are mounted on the film roll storage rack 24 by bolts and bearings; the rollers 263 rotate on the bearings; the two ends of the film roll spindle 254 are placed on the rollers 263 to reduce the rotational resistance of the film roll; and a film support mechanism 23, including a film support mechanism. The packaging device 1 includes a film support frame 231 and a film-supporting cylinder 232. The front end of the film support frame 231 is hinged to the packing roller mounting frame 21 via a pin, and the rear end of the film support frame 231 is connected to the packing roller mounting frame 21 via the film-supporting cylinder 232. The film-supporting cylinder 232 extends and retracts, causing the film support frame 231 to rotate around the hinge point with the packing roller mounting frame 21, i.e., the pin. A film feeding mechanism 22 is provided corresponding to the front lower packing roller 14 of the packaging device 1 and is connected to the film support frame 231 and the film roll storage rack 24, respectively. A braking mechanism 26 is installed on the film roll storage rack 24 corresponding to the packing film roll 25 and is connected to the packing film roll 25 to brake the packing film roll 25 intermittently, causing the packing film 251 to advance forward. A control mechanism 27 is connected to the film support mechanism 23, the film feeding mechanism 22, and the braking mechanism 26, respectively, to control the film support mechanism 23, the film feeding mechanism 22, and the braking mechanism 26 to perform corresponding actions.

[0087] See Figure 2A and 2B , Figure 2A This is a schematic diagram of the structure of the packing roller mounting frame 21 according to an embodiment of the present invention. Figure 2B for Figure 2A A cross-sectional view (AA). In this embodiment, the packing roller mounting frame 21 is bolted to the lower part of the rear compartment 12 of the packing device 1. The front lower packing roller 14 of the packing device 1 is mounted on the packing roller mounting frame 21. The packing film 251 enters the packing device 1 through the front lower packing roller 14 and wraps around the cotton bale 3. The packing roller mounting frame 21 includes symmetrically arranged left and right outer mounting plates 211, left and right inner mounting plates 212, connecting crossbeams 213, and film-flipping plates 214, etc. The left and right inner mounting plates 212 are each provided with a packing film inlet 215 and are equipped with film-flipping plates 214.

[0088] In this embodiment, the film feeding mechanism 22 includes a front pulley 221, a middle pulley 224, and a rear pulley 225. The front pulley 221 is installed at the front end of the film support frame 231, the middle pulley 224 is installed at the rear end of the film support frame 231, and the rear pulley 225 is installed on the film roll storage rack 24. The front pulley 221 is connected to the middle pulley 224 via a front film feeding belt 222, and the rear pulley 225 is connected to the middle pulley 224 via a rear film feeding belt 223. Preferably, the front pulley 221 and the rear pulley 225 are two-groove pulleys, and the middle pulley 224 is preferably a four-groove pulley. The cross-sections of the front film feeding belt 222 and the rear film feeding belt 223 are preferably triangular or hexagonal belts. The front film feeding belt 222 has 4-6 horizontally arranged strips, and the rear film feeding belt 223 has 3-5 horizontally arranged strips.

[0089] See Figure 3A and 3B , Figure 3A This is a schematic diagram of the unfolded packaging film 251 according to an embodiment of the present invention. Figure 3B This is a schematic diagram of the structure of the film roll mandrel 254 according to an embodiment of the present invention. The packaging film roll 25 of this embodiment includes a film roll mandrel 254 and multiple packaging films 251. Adjacent packaging films 251 are bonded together, and the multiple packaging films 251 are sequentially wound around the film roll mandrel 254. Each packaging film 251 has trapezoidal ends. Each packaging film 251 has a separation signal tag 252 and a lift signal tag 253 at its front and rear ends, respectively. The width of the packaging film 251 is greater than the inner cavity width of the packaging device 1. The width of the packaging film 251 is 200-360 mm larger than the inner cavity width of the packaging device 1, and the width of the film roll mandrel 254 is 80-120 mm larger than the width of the packaging film 251. The inner cavity width of the packaging device 1 is the same as the width of the cotton bale 3.

[0090] The intermittent braking mechanism 26 in this embodiment includes a membrane roll holding brake plate 262 and an intermittent braking cylinder 261. One end of the membrane roll holding brake plate 262 is hinged to the membrane roll storage rack 24 by a pin, and the other end of the membrane roll holding brake plate 262 is hinged to the intermittent braking cylinder 261 by a pin. The intermittent braking cylinder 261 extends and retracts at a set frequency to drive the membrane roll holding brake plate 262 to rotate around its rotation axis to hold and brake both ends of the membrane roll mandrel 254.

[0091] The control mechanism 27 includes a controller (not shown), a cotton film speed measuring roller 272, and a photoelectric through-beam sensor 271. The controller can be installed on the cotton harvester and connected to its control mechanism, or it can be located in the cotton harvester's cab and integrated into the control mechanism. Alternatively, it can be a remote control, etc., with no limitations. The cotton film speed measuring roller 272 is mounted on the film roll storage rack 24, and a speed measuring gear is welded to one end of the roller. A speed sensor 273 is located on the outer circumference of the speed measuring gear of the cotton film test roller, and the speed sensor 273 is mounted on the film roll storage rack. On the side wall of 24; the photoelectric through-beam sensor 271 is mounted on the crossbeam below the front of the packing film roll 25; the speed sensor 273 and the photoelectric through-beam sensor 271 are respectively connected to the controller, which is connected to the film-supporting cylinder 232 and the intermittent braking cylinder 261, and controls the extension and retraction of the film-supporting cylinder 232 according to the set cotton bale diameter signal, and controls the extension and retraction of the intermittent braking cylinder 261 according to the label signals at both ends of the packing film 251, the speed signal of the cotton film speed measuring roller 272 detected by the speed sensor 273, and the time signal detected by the photoelectric through-beam sensor 271. The rear film delivery belt 223 is always in contact with the cotton film speed measuring roller 272 to prevent the packing film 251 sandwiched in the middle from being blown off by the wind.

[0092] See Figure 4A and 4B , Figure 4A This is a schematic diagram of the structure of the film support frame 231 according to an embodiment of the present invention. Figure 4B for Figure 4A The side view of the film support frame 231. In this embodiment, the film support frame 231 includes a film support plate 2311, a lifting lug 2314, an upper film tooth 2312, and a pulley mounting plate 2313. The upper film tooth 2312, the pulley mounting plate 2313, and the film support plate 2311 are welded together. The lifting lug 2314 is connected to the film support plate 2311 by bolts. The lifting lug 2314 and the upper film tooth 2312 are respectively located at the front end of the film support plate 2311. The pulley mounting plate 2313 is connected to the film support plate 2311. The tooth bar of the upper film tooth 2312 is made of round steel, has an arc-shaped structure, and is concentric with the lower front packing roller of the packing device 1. The gap between the tooth bar and the packing strap 13 on the lower front packing roller is 3-5mm.

[0093] During operation, the first sheet of packaging film 251 of the packaging film roll 25 is first passed between a pair of photoelectric sensors 271 and between the cotton film speed measuring roller 272 and the rear feeding film belt 223. The front end of the first sheet of packaging film 251 is placed in the middle of the front feeding film belt 222. At this time, the separation signal label 252 at the front end of the packaging film 251 is located between a pair of photoelectric sensors 271. When the cotton bale 3 in the packaging device 1 reaches the set diameter, the controller sends a control signal, the film support cylinder 232 retracts, the film support frame 231 is lifted, and the packaging film 251 is clamped by the front feeding film belt 222 and the packaging belt 13. Under the action of friction, the packaging film 251 moves forward and enters the inner cavity of the packaging device 1 through the front lower packaging roller 14. The packaging film 251 is flipped upwards by the flipping plate 214 of the packaging roller mounting frame 21, which flips the portion of the packaging film 251 that extends beyond the width of the cotton bale 3. The packaging film 251 drives the cotton film speed measuring roller 272 to rotate. When the speed sensor 273 reaches a stable value, it indicates that the packaging film 251 has been wound onto the cotton bale 3. The intermittent braking cylinder 261 is activated, extending or retracting at a certain frequency, pushing the film roll clamping brake plate 262, and intermittently braking the film roll core shaft 254, causing the packaging film 251 to advance intermittently. At the moment of stopping by the intermittent braking cylinder 261, the cotton bale 3 tightens the packaging film 251, and the flipped-up portions at both ends of the packaging film 251 form a binding edge at both ends of the cotton bale 3. The intermittent braking frequency and duration of the intermittent braking cylinder 261 can be set by the controller. When the intermittent braking cylinder 261 extends, the packing film roll 25 stops rotating; when the intermittent braking cylinder 261 retracts, the packing film roll 25 rotates. The extension and retraction times of the intermittent braking cylinder 261 can be set, with one extension and retraction constituting one cycle. The intermittent braking frequency can be changed by setting the extension and retraction times of the intermittent braking cylinder 261. When the lift signal tag 253 at the rear end of the packing film 251 passes the photoelectric photoelectric sensor 271, the intermittent braking cylinder 261 retracts, lifting the film roll holding brake plate 262. When the separation signal tag 252 at the front end of the next packing film 251 passes the photoelectric photoelectric sensor 271, the intermittent braking cylinder 261 extends, and the film roll holding brake plate 262 brakes the film roll core 254, separating the first wrapped packing film 251 from the next packing film 251. The separation signal tag 252 at the front end of the next packing film 251 stops at the photoelectric photoelectric sensor 271, ready for the next wrapping. When the packing film roll 25 is used up, the spare packing film roll 25 can be placed in the lower working position of the film roll storage rack 24 to continue packing.

[0094] The circular wrapping film method of the present invention includes the following steps:

[0095] Step S100: Pass the first packing film 251 of the packing film roll 25 sequentially between the photoelectric beam sensors 271 and between the cotton film speed measuring roller 272 and the rear feed film belt 223. Place the front end of the first packing film 251 in the middle of the front feed film belt 222, and make the separation signal label 252 at the front end of the packing film 251 located between the photoelectric beam sensors 271.

[0096] Step S200: When the cotton bale 3 in the packaging device 1 reaches the set diameter, the controller sends a control signal, the film support cylinder 232 contracts to lift the film support frame 231, and the packaging film 251 is clamped by the front feeding film belt 222 and the packaging belt 13. Under the action of friction, the packaging film 251 moves forward and enters the inner cavity of the packaging device 1 through the front lower packaging roller 14.

[0097] Step S300: The portion of the packing film 251 that is wider than the cotton bale 3 is flipped upwards by the flipping plate 214 of the packing roller mounting frame 21.

[0098] Step S400: The packing film 251 drives the cotton film speed measuring roller 272 to rotate. When the speed sensor reaches a stable value, the intermittent braking cylinder 261 is activated to extend or retract at a set frequency, pushing the film roll brake plate 262 to intermittently brake the spindle of the packing film roll 25, so that the packing film 251 advances forward intermittently.

[0099] In step S500, at the instant the device is brought to a stop by the hydraulic cylinder 261, the cotton bag 3 pulls the packing film 251 taut, and the folded-up portions of the packing film 251 form edgings at both ends of the cotton bag 3.

[0100] Step S600: When the lifting signal tag 253 at the rear end of the packaging film 251 passes the photoelectric beam sensor 271, the point brake cylinder 261 retracts and lifts the film roll brake plate 262.

[0101] In step S700, the separation signal tag 252 at the front end of the next packing film 251 passes the photoelectric photoelectric sensor 271, and the point brake cylinder 261 extends to stop the film roll core 254 by the film roll holding brake plate 262, thus separating the first packing film 251 that has been wrapped from the next packing film 251.

[0102] Step S800: The separation signal tag 252 at the front end of the next packing film 251 stops at the photoelectric through-beam sensor 271, preparing for the next wrapping; and

[0103] Step S900, repeat steps S200-S800 until the packaging work is completed.

[0104] In this embodiment, the film roll storage rack 24 can be divided into upper and lower layers. The upper layer holds spare film rolls, and the packaged film rolls 25 in use are placed in the lower layer. After the packaged film rolls 25 are used up, they are removed, and the spare film rolls are placed in the lower working position of the film roll storage rack 24.

[0105] The point-brake progressive round bale wrapping device 2 of the present invention achieves intermittent progressive advancement of the packing film roll through a point-brake hydraulic cylinder. During the wrapping process, the packing film is tightened, so that the packing film is tightly wrapped around the surface of the cotton bale 3, forming a wrapped edge at the end, which facilitates cotton transportation. It has a simple structure, reliable operation, low manufacturing cost, and good wrapping effect, and can be applied to round bale cotton harvesters and other round bale forming machinery. In this embodiment, the point-brake progressive round bale wrapping device 2 is preferably applied to the cotton harvester packing device 1.

[0106] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A circular wrapping film device, installed on the baling device of a cotton harvester, characterized in that, include: A packing roller mounting bracket is installed in the lower part of the rear compartment of the packing device; A film roll storage rack is installed on the rear side of the rear compartment of the packaging device, and the packaged film rolls are placed on the film roll storage rack; The film support mechanism includes a film support frame and a film support cylinder. The front end of the film support frame is hinged to the packing roller mounting frame, and the rear end of the film support frame is connected to the packing roller mounting frame through the film support cylinder. The film support cylinder extends and retracts to drive the film support frame to rotate around the hinge point with the packing roller mounting frame. The film feeding mechanism is provided corresponding to the front lower packing roller of the packing device and is connected to the film support frame and the film roll storage rack respectively; A point braking mechanism is installed on the film roll storage rack corresponding to the packaging film roll and connected to the packaging film roll to point brake the packaging film roll, so that the packaging film is intermittently moved forward; as well as A control mechanism is connected to the film-supporting mechanism, the film-feeding mechanism, and the intermittent braking mechanism respectively to control the film-supporting mechanism, the film-feeding mechanism, and the intermittent braking mechanism to perform corresponding actions; The film feeding mechanism includes a front pulley, a middle pulley, and a rear pulley. The front pulley is installed at the front end of the film support frame, the middle pulley is installed at the rear end of the film support frame, and the rear pulley is installed on the film roll storage rack. The front pulley is connected to the middle pulley via a front film feeding belt, and the rear pulley is connected to the middle pulley via a rear film feeding belt. The packing film roll includes a film roll mandrel and multiple packing films. Adjacent packing films are bonded together, and multiple packing films are sequentially wound on the film roll mandrel. The front and rear ends of each packing film are trapezoidal. Each packing film has a separation signal label and a lift signal label at its front and rear ends, respectively. The width of the packing film is greater than the inner cavity width of the packing device. The intermittent braking mechanism includes a membrane roll holding brake plate and an intermittent braking cylinder. One end of the membrane roll holding brake plate is hinged to the membrane roll storage rack, and the other end of the membrane roll holding brake plate is hinged to the intermittent braking cylinder. The intermittent braking cylinder extends and retracts at a set frequency to drive the membrane roll holding brake plate to hold and brake both ends of the membrane roll mandrel. The film support frame includes a film support plate, lifting lugs, upper film teeth, and a pulley mounting plate. The lifting lugs and upper film teeth are respectively installed at the front end of the film support plate. The pulley mounting plate is connected to the film support plate. The tooth bar of the upper film tooth is arc-shaped and concentric with the lower front packing roller of the packing device. The gap between the tooth bar and the packing strap on the lower front packing roller is 3-5mm.

2. The circular wrapping film device as described in claim 1, characterized in that, The front pulley and rear pulley are both two-groove pulleys, the middle pulley is a four-groove pulley, the cross-section of the front and rear film feeding belts is a triangular belt or a hexagonal belt, the front film feeding belt has 4-6 horizontal strips, and the rear film feeding belt has 3-5 horizontal strips.

3. The circular wrapping film device as described in claim 1, characterized in that, The control mechanism includes a controller, a cotton film speed measuring roller, and a photoelectric through-beam sensor. The cotton film speed measuring roller is mounted on a film roll storage rack, and a speed sensor is provided on the outer circle of the speed measuring gear at one end of the cotton film speed measuring roller. The photoelectric through-beam sensor is located below and in front of the packing film roll. The speed sensor and the photoelectric through-beam sensor are respectively connected to the controller. The controller is connected to the film-supporting cylinder and the intermittent braking cylinder, and controls the extension and retraction of the film-supporting cylinder according to the set cotton bale diameter signal, and controls the extension and retraction of the intermittent braking cylinder according to the label signal of the packing film, the speed signal of the cotton film speed measuring roller, and the time signal detected by the photoelectric through-beam sensor.

4. The circular wrapping film device as described in claim 3, characterized in that, The feed film belt is always in contact with the cotton film speed measuring roller to prevent the packing film from being blown off.

5. A method for circular wrapping film, characterized in that, The circular wrapping film apparatus according to any one of claims 1-4 comprises the following steps: S100. The first sheet of the packing film roll is passed sequentially between the photoelectric through-beam sensors and between the cotton film speed measuring roller and the rear feeding film belt. The front end of the first sheet of the packing film is placed in the middle of the front feeding film belt, and the signal tag at the front end of the packing film is located between the photoelectric through-beam sensors. S200. When the cotton bale in the baling device reaches the set diameter, the controller sends a control signal, the film support cylinder contracts to lift the film support frame, the baling film is clamped by the front feeding film belt and the baling belt, and under the action of friction, the baling film moves forward and enters the inner cavity of the baling device through the front lower baling roller. S300, the portion of the packing film that is wider than the width of the cotton bale is flipped upwards by the flipping plate of the packing roller mounting frame; S400. The packing film drives the cotton film speed measuring roller to rotate. When the speed sensor reaches a stable value, the intermittent braking cylinder is activated to extend or retract at a set frequency, pushing the film roll holding brake plate to intermittently brake the core shaft of the packing film roll, so that the packing film is intermittently moved forward. S500, at the moment of being stopped by the hydraulic cylinder, the cotton bag tightens the packing film, and the folded-up parts at both ends of the packing film form a wrapping edge at both ends of the cotton bag; S600: When the signal tag at the rear end of the packaged film roll passes the through-beam sensor, the point brake cylinder retracts and lifts the film roll brake plate. S700, the signal tag at the front end of the next packing film roll passes through the through-beam sensor, the point brake cylinder extends to stop the film roll core shaft by the film roll holding brake plate, and separates the already wrapped first packing film from the next packing film. S800, the front label of the next packing film stops at the photoelectric beam sensor, ready for the next wrapping; as well as S900, repeat steps S200-S800 until the packaging work is completed.

6. The circular wrapping film method as described in claim 5, characterized in that, The film roll storage rack is divided into upper and lower layers. Spare film rolls are placed on the upper layer, and packaged film rolls in use are placed on the lower layer. After the packaged film rolls are used up, they are removed, and the spare film rolls are placed in the lower working position of the film roll storage rack.

7. A packaging device, characterized in that, It includes the circular wrapping film device according to any one of claims 1-4, and is packaged using the circular wrapping film method according to claim 5 or 6.

8. A cotton harvester, characterized in that, It includes the packaging device as described in claim 7, and is packaged using the circular wrapping method as described in claim 5 or 6.

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