Screening equipment and screening method for making French fries

Abstract

The invention discloses a screening device and a screening method for making French fries. Unscreened raw potato strips first enter a feeding track, and then pass through a flattening baffle and a partition structure to divide the potato strips into three types: thick, medium and thin potato strips. The thin potato strips will be discarded, and the thick potato strips and medium potato strips can be further processed under different processing conditions, thereby improving the utilization rate of the raw potato strips. One end of a screening bracket is rotatably arranged on a mounting bracket, and the other end is connected with an adjusting mechanism. The adjusting mechanism can raise and lower the small end of a conical roller, and then adjust the distance from the lower edge of the conical roller to a conveyor belt. When the thickness of the thick potato strips changes, the distance from the small end of the conical roller to the conveyor belt can be adaptively adjusted according to the thickness of the thick potato strips. Since the large end of the conical roller is closer to the rotation center of the screening bracket, the distance from the large end of the conical roller to the conveyor belt changes little, thereby facilitating the maintenance of the same standard for distinguishing between medium and thin potato strips.

Description

Technical Field

[0001] The invention relates to the technical field of screening, in particular to screening equipment and a screening method for making French fries. Background Art

[0002] When making French fries, potatoes must be cut into strips first. Some potato strip cutting equipment generally uses hydraulic impact or extrusion to make potatoes pass through a mold with square holes. The mold divides the potatoes into multiple potato strips. Due to the irregular shape of the potatoes, only the center of the potato will be divided into uniform potato strips, and the edge of the potato will be divided into thinner potato strips, resulting in uneven thickness of the potato strips, which in turn causes uneven heating of the potato strips during processing. In particular, thin potato strips are prone to over-scorching, affecting the taste quality of the final French fries.

[0003] The patent with publication number CN217250437U and publication date August 23, 2022 in the prior art provides a drum-type French fries screening machine, which separates thin French fries through the long strip sieve holes on the drum. Since the French fries are long strips, it can only work when the placement direction of the thin French fries is the same as the direction of the long strip sieve holes, resulting in low screening efficiency of this scheme. Therefore, it is necessary to design a screening setting that can screen potato strips with different placement directions to improve the screening efficiency of potato strips. Summary of the invention

[0004] The object of the present invention is to provide a screening device and a screening method for making French fries, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: a screening device for making French fries, comprising a screening bracket, one end of which is rotatably arranged on a mounting bracket, and the other end of which is connected to an adjustment mechanism, the mounting bracket can be fixed on the ground, a conical drum is rotatably arranged in the screening bracket, the large end of the conical drum faces the rotation center of the screening bracket, a conveyor belt is arranged under the conical drum, and the conveyor belt can be installed on the ground;

[0006] One end of the conveyor belt is an entrance, and the other end is an exit. A partition structure is arranged between the conveyor belt exit and the conical roller. The partition structure is installed on the conveyor belt. The partition structure has three channels. A channel for thin potato strips is located below the large end of the conical roller, a channel for thick potato strips is located below the small end of the conical roller, and a channel for medium potato strips is located between the channel for thick potato strips and the channel for thin potato strips.

[0007] A feeding track is arranged between the conveyor belt entrance and the conical roller. The feeding track is installed above the conveyor belt. The feeding track is aligned with the thin potato strip channel. A flattening baffle is arranged at the feeding track entrance. The distance from the lower edge of the flattening baffle to the upper surface of the conveyor belt is the thickness of the thick potato strips.

[0008] Preferably, the partition structure includes two side panels and two partition plates, one of the side panels is respectively installed on the left and right sides of the conveyor belt, a fixing rod is fixed between the two side panels, and a partition plate is provided between the thin potato strip channel and the medium potato strip channel and between the medium potato strip channel and the thick potato strip channel, and the partition plate is fixed on the fixing rod.

[0009] Preferably, the adjustment mechanism includes an adjustment arm and a lifting block. The adjustment arm is fixed to one end of the screening bracket away from its rotation center. An adjustment surface is provided under the adjustment arm. The adjustment surface is in contact with the lifting block. The rotation center of the screening bracket, the lower edge of the conical drum and the adjustment surface are on the same straight line. The lifting block is slidably arranged on the adjustment bracket. An adjustment screw is rotatably arranged on the adjustment bracket. The adjustment screw is threadedly connected to the lifting block.

[0010] Preferably, the adjusting surface contacts an edge of the lifting block, which is called the adjusting edge. The distance from the rotation center of the screening bracket to the dividing line between the medium potato strip channel and the coarse potato strip channel is R, and the horizontal distance from the rotation center of the screening bracket to the adjusting edge is 2R. The flattening baffle is lifted and lowered at the entrance of the feeding track. A pulley A is rotatably arranged on the flattening baffle, and a pulley B is arranged above the flattening baffle. The pulley B is rotatably arranged on the pulley bracket, and the pulley bracket can be fixed on the ground. A pulley C is rotatably arranged on the adjusting bracket. The lifting block can increase the distance between the lifting block and the pulley C. One end of a rope is fixed on the pulley bracket, and the other end of the rope first bypasses the pulley A and then the pulley B, and then bypasses the pulley C to connect to the bottom of the lifting block.

[0011] Preferably, three sets of dredging mechanisms are provided at the partition structure, and one set of dredging mechanisms is provided at each channel. Each set of dredging mechanisms includes a dredging needle and a dredging bracket. The dredging needle is slidably arranged in a protective sleeve, one end of the protective sleeve is rotatably arranged with one end of a connecting rod A, the other end of the connecting rod A is rotatably arranged at one end of the dredging bracket, the other end of the dredging bracket is rotatably arranged with one end of a connecting rod B, the other end of the connecting rod B is rotatably arranged at the other end of the protective sleeve, the protective sleeve, the connecting rod A, the connecting rod B and the dredging bracket form a parallelogram, and the dredging bracket can be fixed on the ground.

[0012] Preferably, the dredging needle is driven by a rigid chain, a driven sprocket is rotatably provided at the rotational connection between the protective sleeve and the A connecting rod, a driving sprocket is rotatably provided at the rotational connection between the A connecting rod and the dredging bracket, one end of the rigid chain is fixed on the dredging needle, and the other end is fixed on the chain slider passing through the driven sprocket and the driving sprocket 408, and the chain slider is slidably provided on the dredging bracket;

[0013] For the parallelogram formed by the protective cover, A connecting rod, B connecting rod and dredging bracket, three chain baffles are arranged on the outside of the parallelogram, and the three chain baffles are respectively fixed to the protective cover, A connecting rod and dredging bracket. A limiting structure A is arranged outside the driven sprocket, and the A limiting structure can prevent the rigid chain from falling off the driven sprocket. A B limiting structure is arranged outside the driving sprocket 408, and the B limiting structure can prevent the rigid chain from falling off the driving sprocket.

[0014] Preferably, the driving sprockets of the three sets of dredging mechanisms are fixed on a driving shaft, the driving shaft is rotatably set on a connecting bracket, the connecting bracket can be fixed on the ground, the dredging bracket is fixed on the connecting bracket, the A connecting rods of the three sets of dredging mechanisms are fixed on a connecting shaft, a driving bracket is provided on one side of the connecting bracket, one end of a driving telescopic rod is rotatably set on the driving bracket, and the other end of the driving telescopic rod is rotatably set on the A connecting rod of any set of dredging mechanisms, and the driving bracket can be fixed on the ground.

[0015] Preferably, a spiral protrusion is fixed on the conical roller.

[0016] Preferably, a feeding ramp is fixed at the entrance of the feeding track.

[0017] Another aspect of the present invention provides a screening method using a screening device made of French fries, comprising the following steps:

[0018] S1, flattening, the unscreened potato strips raw materials enter the conveyor belt from the feeding track, and when passing through the flattening baffle, the accumulated potato strips are blocked by the flattening baffle, so that the potato strips raw materials are flattened into one layer;

[0019] S2, the first screening, the potato strips passing through the flattening baffle first arrive under the large end of the conical drum, and the thin potato strips leave from the gap between the large end of the conical drum and the conveyor belt and enter the thin potato strip channel. Since the distance between the large end of the conical drum and the conveyor belt is smaller than the thickness of the thick potato strips and the medium potato strips, the thick potato strips and the medium potato strips cannot pass through the gap between the large end of the conical drum and the conveyor belt, and the thick potato strips and the medium potato strips move toward the small end of the conical drum;

[0020] S3. Screening again. When the coarse potato strips and the medium potato strips move toward the small end of the conical roller, the interval between the conical roller and the conveyor belt gradually increases. The medium potato strips enter the medium potato strip channel first, and then the coarse potato strips enter the coarse potato strip channel.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the unscreened potato strips raw materials first enter the feeding track and then pass through the flattening baffle. When passing through the flattening baffle, the accumulated potato strips are blocked by the flattening baffle, so that the potato strips raw materials are flattened into a layer. Then the feeding track allows the potato strips flattened into a layer to reach the large end of the conical drum, and the thin potato strips leave from the gap between the large end of the conical drum and the conveyor belt and enter the thin potato strip channel. The thick potato strips and medium potato strips cannot pass through the gap between the large end of the conical drum and the conveyor belt, and move toward the small end of the conical drum to enter the medium potato strip channel and the thick potato strip channel respectively, completing the screening work. The thickness difference of the potato strips can be used to screen the potato strips in different placement directions through the conical drum and the conveyor belt, thereby improving the potato strip screening efficiency.

[0022] The potato strips are divided into three types: thick, medium and thin potato strips through the separation structure. The thin potato strips will be discarded, and the thick and medium potato strips can be further processed under different processing conditions, thereby improving the utilization rate of the potato strip raw materials. One end of the screening bracket is rotatably set on the mounting bracket, and the other end is connected with an adjusting mechanism. The adjusting mechanism can raise and lower the small end of the conical roller, and then adjust the distance from the lower edge of the conical roller to the conveyor belt. When the thickness of the thick potato strips changes, the distance from the small end of the conical roller to the conveyor belt can be adaptively adjusted according to the thickness of the thick potato strips. Since the large end of the conical roller is closer to the rotation center of the screening bracket, the distance from the large end of the conical roller to the conveyor belt changes little, which is convenient for maintaining basically the same standard for distinguishing between medium and thin potato strips. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an axonometric view of the present invention;

[0024] Figure 2 This is another angled isometric view of the present invention, with the dredging mechanism removed;

[0025] Figure 3 This is a front view of the present invention, with the dredging mechanism removed;

[0026] Figure 4 This is another angled isometric view of the present invention, with the dredging mechanism removed;

[0027] Figure 5 This is a front view of the dredging mechanism of the present invention, with the dredging needle retracted into the protective sleeve;

[0028] Figure 6 This is an axonometric view of the dredging mechanism of the present invention, with the dredging needle extending from the protective sleeve;

[0029] Figure 7 This is an isometric view of the dredging mechanism of the present invention from another angle, with the dredging needle extending from the protective sleeve;

[0030] Figure 8 It is a schematic diagram of a rigid chain of the present invention;

[0031] Fig. 9 It is an axonometric view of three sets of dredging mechanisms and connecting brackets of the present invention.

[0032] In the figure: 101, screening bracket, 102, mounting bracket, 103, conical drum, 104, conveyor belt, 105, feeding track, 106, flattening baffle, 107, spiral protrusion, 108, feeding ramp, 200, adjustment mechanism, 201, adjustment arm, 202, adjustment surface, 203, lifting block, 204, adjustment screw, 205, A pulley, 206, B pulley, 207, C pulley, 208, pulley bracket, 209, adjustment bracket, 210, rope, 211, D pulley, 212, E pulley, 213, F pulley, 214, G pulley, 300, partition structure, 301 , thin potato strips channel, 302, medium potato strips channel, 303, thick potato strips channel, 304, side panel, 305, partition plate, 306, fixing rod, 400, dredging mechanism, 401, dredging needle, 402, protective cover, 403, A connecting rod, 404, dredging bracket, 405, B connecting rod, 406, rigid chain, 407, driven sprocket, 408, driving sprocket, 409, chain slider, 410, chain baffle, 411, A limiting structure, 412, B limiting structure, 501, driving shaft, 502, connecting bracket, 503, driving bracket, 504, driving telescopic rod, 505, connecting shaft. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1: The present invention provides a technical solution: a screening device for making French fries, such as Figure 1 As shown, it includes a screening bracket 101, one end of which is rotatably set on a mounting bracket 102, and the other end is connected to an adjustment mechanism 200, the mounting bracket 102 can be fixed on the ground, and a conical drum 103 is rotatably set inside the screening bracket 101, the large end of the conical drum 103 faces the rotation center of the screening bracket 101, and a conveyor belt 104 is set under the conical drum 103, and the conveyor belt 104 can be installed on the ground. In this embodiment, the conical drum 103 is driven by a drum motor, and the drum motor is installed on the screening bracket 101.

[0035] like Figure 1 , 2As shown, one end of the conveyor belt 104 is an entrance, and the other end is an exit, a partition structure 300 is arranged between the exit of the conveyor belt 104 and the conical drum 103, the partition structure 300 is installed on the conveyor belt 104, and the partition structure 300 has three channels, a thin potato strip channel 301 is provided below the large end of the conical drum 103, a thick potato strip channel 303 is provided below the small end of the conical drum 103, and a medium potato strip channel 302 is provided between the thick potato strip channel 303 and the thin potato strip channel 301. The potato strips leaving the thin potato strip channel 301 will be discarded, and the potato strips leaving the thick potato strip channel 303 and the medium potato strip channel 302 can be further processed using different processing conditions, thereby improving the utilization rate of the potato strip raw materials.

[0036] like Figure 1 , 2 As shown, a feeding track 105 is provided between the entrance of the conveyor belt 104 and the conical roller 103, the feeding track 105 is installed above the conveyor belt 104, the feeding track 105 is aligned with the thin potato strip channel 301, and a flattening baffle 106 is provided at the entrance of the feeding track 105, and the distance from the lower edge of the flattening baffle 106 to the upper surface of the conveyor belt 104 is the thickness of the thick potato strips.

[0037] The unscreened potato strips raw materials first enter the feeding track 105, and then pass through the flattening baffle 106. When passing through the flattening baffle 106, the accumulated potato strips are blocked by the flattening baffle 106, so that the potato strips raw materials are flattened into a layer. Then the feeding track 105 allows the potato strips flattened into a layer to reach the bottom of the large end of the conical drum 103, and the thin potato strips leave from the gap between the large end of the conical drum 103 and the conveyor belt 104 and enter the thin potato strip channel 301. Since the distance between the large end of the conical drum 103 and the conveyor belt 104 is smaller than the thickness of the thick potato strips and the medium potato strips, the thick potato strips and the medium potato strips cannot pass through the gap between the large end of the conical drum 103 and the conveyor belt 104. The medium potato strips and the thick potato strips move toward the small end of the conical drum 103 and enter the medium potato strip channel 302 and the thick potato strip channel 303 respectively, completing the screening work.

[0038] When the thickness of the thick potato strips changes, the adjusting mechanism 200 can raise and lower the small end of the conical roller 103, and then adjust the distance from the lower edge of the conical roller 103 to the conveyor belt 104. The distance from the small end of the conical roller 103 to the conveyor belt 104 can be adaptively adjusted according to the thickness of the thick potato strips. Since the large end of the conical roller 103 is closer to the rotation center of the screening bracket 101, the distance from the large end of the conical roller 103 to the conveyor belt 104 changes little, which is convenient for maintaining basically the same standard for distinguishing medium potato strips and thin potato strips.

[0039] like Figure 2As shown, the partition structure 300 includes two side panels 304 and two partition panels 305. One side panel 304 is installed on the left and right sides of the conveyor belt 104 respectively. A fixing rod 306 is fixed between the two side panels 304. A partition panel 305 is provided between the thin potato strip channel 301 and the medium potato strip channel 302, and between the medium potato strip channel 302 and the thick potato strip channel 303. The partition panel 305 is fixed on the fixing rod 306.

[0040] like Figure 2 , 3 As shown, the adjustment mechanism 200 includes an adjustment arm 201 and a lifting block 203. The adjustment arm 201 is fixed to one end of the screening support 101 away from its rotation center. An adjustment surface 202 is provided under the adjustment arm 201. The adjustment surface 202 is in contact with the lifting block 203. The rotation center of the screening support 101, the lower edge of the conical drum 103, and the adjustment surface 202 are on the same straight line. ( Figure 3 The middle dotted line is the straight line where the rotation center of the screening bracket 101, the lower edge of the conical drum 103, and the adjustment surface 202 are located). The lifting block 203 is slidably set on the adjustment bracket 209, and the adjustment screw 204 is rotatably set on the adjustment bracket 209, and the adjustment screw 204 is threadedly connected to the lifting block 203.

[0041] Rotating the adjusting screw 204 can drive the lifting block 203 to rise and fall, thereby driving the position where the lifting block 203 contacts the adjusting surface 202 to change, thereby driving the adjusting arm 201 and the screening bracket 101 to rotate, thereby driving the lower edge of the conical roller 103 away from the conveyor belt 104, so that the distance from the small end of the conical roller 103 to the conveyor belt 104 can be adaptively adjusted according to the thickness of the thick potato strips.

[0042] like Figure 2 , 34, the adjusting surface 202 contacts an edge of the lifting block 203, and the edge is called the adjusting edge. The distance from the rotation center of the screening bracket 101 to the dividing line between the medium potato strip channel 302 and the thick potato strip channel 303 (i.e., the center line of the partition plate 305 between the medium potato strip channel 302 and the thick potato strip channel 303) is R, and the horizontal distance from the rotation center of the screening bracket 101 to the adjusting edge is 2R. The flattening baffle 106 is set at the entrance of the feeding track 105, and a pulley 20 is arranged on the flattening baffle 106. 5. A B pulley 206 is arranged above the flattening baffle 106. The B pulley 206 is rotatably arranged on a pulley bracket 208. The pulley bracket 208 can be fixed on the ground. A C pulley 207 is rotatably arranged on an adjusting bracket 209. The lifting block 203 rises to increase the distance between the lifting block 203 and the C pulley 207. One end of a rope 210 is fixed on the pulley bracket 208. The other end of the rope 210 first passes around the A pulley 205, then around the B pulley 206, and then around the C pulley 207 to connect to the bottom of the lifting block 203. Figure 4 As shown, in addition to the A pulley 205, the B pulley 206 and the C pulley 207, the D pulley 211, the E pulley 212, the F pulley 213 and the G pulley 214 are also provided in this example. These pulleys guide the rope 210. The number and position of these pulleys can be adjusted according to the specific situation. For the system composed of the pulley bracket 208, the A pulley 205, the B pulley 206 and the rope 210, the A pulley 205 is equivalent to a movable pulley. Whenever the lifting block 203 rises and the distance between the lifting block 203 and the C pulley 207 increases by 2h, the A pulley is raised by the rope 210 by a distance h, thereby driving the flattening baffle 106 to rise by h.

[0043] The straight line where the rotation center of the screening support 101, the lower edge of the conical drum 103, the adjustment surface 202 are located, the dividing line between the medium potato strip channel 302 and the thick potato strip channel 303 (i.e., the center line of the partition plate 305 between the medium potato strip channel 302 and the thick potato strip channel 303), the horizontal straight line passing through the rotation center of the screening support 101 and the trajectory line of the adjustment edge form two similar triangles, so that the lifting distance of the lifting block 203 can be proportionally reduced to the medium potato strip channel 302 and the thick potato strip channel 303. 03 and the conveyor belt 104, and the distance between the conical roller 103 and the conveyor belt 104 at the dividing line between the medium potato strip channel 302 and the thick potato strip channel 303 is easy to adjust. Every time the lifting block 203 is raised for 2h, the distance between the conical roller 103 and the conveyor belt 104 at the dividing line between the medium potato strip channel 302 and the thick potato strip channel 303 increases by h, thereby driving the distance between the lifting block 203 and the C pulley 207 to increase by 2h, thereby driving the A pulley 205 to rise by h, thereby driving the flattening baffle 106 to rise by h, and realizing the synchronous adjustment of the flattening baffle 106 and the conical roller 103. When the thickness of the thick potato strips increases by h, the lifting block 203 is raised by 2h, which can drive the distance between the conical roller 103 and the conveyor belt 104 at the dividing line between the medium potato strip channel 302 and the thick potato strip channel 303 to increase by h, and can drive the flattening baffle 106 to rise by h.

[0044] like Figure 1 , 5 As shown in Figure 6, three sets of dredging mechanisms 400 are arranged at the partition structure 300, and one set of dredging mechanisms 400 is arranged at each channel. Each set of dredging mechanisms 400 includes a dredging needle 401 and a dredging bracket 404. The dredging needle 401 is slidably arranged in the protective sleeve 402, one end of the protective sleeve 402 is rotatably arranged with one end of the A connecting rod 403, the other end of the A connecting rod 403 is rotatably arranged at one end of the dredging bracket 404, the other end of the dredging bracket 404 is rotatably arranged with one end of the B connecting rod 405, the other end of the B connecting rod 405 is rotatably arranged at the other end of the protective sleeve 402, the protective sleeve 402, the A connecting rod 403, the B connecting rod 405 and the dredging bracket 404 form a parallelogram, and the dredging bracket 404 can be fixed on the ground.

[0045] The rotation of the B connecting rod 405 can drive the protection cover 402 to move, and then drive the A connecting rod 403 to rotate. After the protection cover 402 moves to the lowest point, the unblocking needle 401 is extended. The unblocking needle 401 can push away the potato strips between the conical roller 103 and the conveyor belt 104, and unblock the blockage between the conical roller 103 and the conveyor belt 104.

[0046] like Figure 6 , 7As shown in Figure 8, the dredging needle 401 is driven by a rigid chain 406. The rigid chain 406 is a chain that adopts an asymmetric design so that it can only bend to one side. A driven sprocket 407 is rotatably provided at the rotating connection between the protective cover 402 and the A connecting rod 403. A driving sprocket 408 is rotatably provided at the rotating connection between the A connecting rod 403 and the dredging bracket 404. One end of the rigid chain 406 is fixed on the dredging needle 401, and the other end bypasses the driven sprocket 407 and the driving sprocket 408 and is fixed on the chain slider 409. The chain slider 409 is slidably provided on the dredging bracket 404.

[0047] For the parallelogram formed by the protective cover 402, the A connecting rod 403, the B connecting rod 405 and the dredging bracket 404, three chain baffles 410 are arranged on the outside of the parallelogram, and the three chain baffles 410 are respectively fixed to the protective cover 402, the A connecting rod 403 and the dredging bracket 404, and an A limiting structure 411 is arranged outside the driven sprocket 407, and the A limiting structure 411 can prevent the rigid chain 406 from falling off the driven sprocket 407, and a B limiting structure 412 is arranged outside the driving sprocket 408, and the B limiting structure 412 can prevent the rigid chain 406 from falling off from the driving sprocket 408. Figure 5 As shown, in this embodiment, the A limiting structure 411 adopts a step structure, which is fixed on the protective cover 402, and the B limiting structure adopts a lap structure, including an inner arc plate and an outer arc plate, the inner arc plate is fixed on the A connecting rod 403, and the outer arc plate is fixed on the dredging bracket 404.

[0048] After the protective cover 402 moves to the lowest point, through the action of the chain baffle 410, the A limiting structure 411 and the B limiting structure 412, the rigid chain 406 can only bend at the driven sprocket 407 and the driving sprocket 408, so that the rotation of the driving sprocket 408 can drive the rigid chain 406 to move, and then drive the chain slider 409 to slide, and then drive the unblocking needle 401 to slide. When the unblocking needle 401 retracts into the protective cover 402, the rigid chain 406 is stored in the A connecting rod 403 and the unblocking bracket 404, which reduces the length of the protective cover 402 and saves space.

[0049] like Figure 8 , 9As shown, the driving sprockets 408 of the three dredging mechanisms 400 are fixed on a driving shaft 501, and the driving shaft 501 is rotatably arranged on a connecting bracket 502. In this embodiment, the driving shaft 501 is driven by a driving motor, and the driving motor is fixed on the connecting bracket 502. The connecting bracket 502 can be fixed on the ground, and the dredging bracket 404 is fixed on the connecting bracket 502. The A connecting rod 403 of the three dredging mechanisms 400 is fixed on a connecting shaft 505. A driving bracket 503 is arranged on one side of the connecting bracket 502, and a driving telescopic rod 503 is rotatably arranged on the driving bracket 503. 04, and the other end of the driving telescopic rod 504 is rotatably set on the A-link 403 of any set of dredging mechanism 400. In this embodiment, the driving telescopic rod 504 adopts a cylinder, and the driving bracket 503 can be fixed on the ground. The extension and retraction of the driving telescopic rod 504 can drive the A-link 403 rotatably connected thereto to rotate, and then drive other A-links 403 connected through the connecting shaft 505, thereby driving the protective cover 402 to move. The driving motor can drive the driving shaft 501 to rotate, and then drive the driving sprocket 408 to rotate, thereby driving the rigid chain 406 to move.

[0050] like Figure 1 As shown, in order to facilitate pushing the potato strips at the conical roller 103, a spiral protrusion 107 is fixed on the conical roller 103.

[0051] like Figure 1 As shown, in order to facilitate the unscreened potato strips raw materials to enter the feeding track 105, the feeding track 105 is fixed with a feeding slope 108 at its entrance.

[0052] Working process: the unscreened potato strips raw materials first enter the feeding track 105, and then pass through the flattening baffle 106. When passing through the flattening baffle 106, the accumulated potato strips are blocked by the flattening baffle 106, so that the potato strips raw materials are flattened into a layer. Then the feeding track 105 allows the potato strips flattened into a layer to reach the large end of the conical drum 103. The thin potato strips leave from the gap between the large end of the conical drum 103 and the conveyor belt 104 and enter the thin potato strip channel 301. The thick potato strips and medium potato strips cannot pass through the gap between the large end of the conical drum 103 and the conveyor belt 104. Under the push of the spiral protrusion 107 on the conical drum 103, the medium potato strips and the thick potato strips move toward the small end of the conical drum 103 and enter the medium potato strip channel 302 and the thick potato strip channel 303 respectively, completing the screening work.

[0053] When the thickness of the thick potato strips changes, rotating the adjusting screw 204 can drive the lifting block 203 to rise and fall. Every time the lifting block 203 rises for 2 hours, the distance between the conical roller 103 and the conveyor belt 104 at the dividing line between the middle potato strip channel 302 and the thick potato strip channel 303 increases by h, thereby driving the distance between the lifting block 203 and the C pulley 207 to increase by 2 hours, thereby driving the A pulley 205 to rise by h, thereby driving the flattening baffle 106 to rise by h, thereby realizing synchronous adjustment of the flattening baffle 106 and the conical roller 103, so that the distance from the small end of the conical roller 103 to the conveyor belt 104 and the distance from the lower edge of the flattening baffle 106 to the conveyor belt 104 can be adaptively adjusted according to the thickness of the thick potato strips.

[0054] When potato strips are blocked at the conical drum 103, driving the telescopic rod 504 to extend can drive the A-link 403 rotatably connected thereto to rotate, and then drive other A-links 403 connected through the connecting shaft 505, thereby driving the protective cover 402 to move. After the protective cover 402 moves to the lowest point, the driving motor can drive the driving shaft 501 to rotate, and then drive the driving sprocket 408 to rotate.

[0055] Through the action of the chain baffle 410, the A limiting structure 411 and the B limiting structure 412, the rigid chain 406 can only be bent at the driven sprocket 407 and the driving sprocket 408, so that the rotation of the driving sprocket 408 can drive the rigid chain 406 to move, and then drive the unblocking needle 401 to slide. After the unblocking needle 401 extends from the protective cover 402, it can push away the potato strips between the conical roller 103 and the conveyor belt 104, and unblock the blockage between the conical roller 103 and the conveyor belt 104.

[0056] Embodiment 2: A screening method using the screening device for making French fries according to embodiment 1, comprising the following steps:

[0057] S1, flattening, the unscreened potato strips raw material enters the conveyor belt 104 from the feeding track 105, and when passing through the flattening baffle 106, the accumulated potato strips are blocked by the flattening baffle 106, so that the potato strips raw material is flattened into a layer;

[0058] S2, initial screening, the potato strips passing through the flattening baffle 106 first arrive under the large end of the conical drum 103, and the thin potato strips leave from the gap between the large end of the conical drum 103 and the conveyor belt 104 and enter the thin potato strip channel 301. Since the distance between the large end of the conical drum 103 and the conveyor belt 104 is smaller than the thickness of the thick potato strips and the medium potato strips, the thick potato strips and the medium potato strips cannot pass through the gap between the large end of the conical drum 103 and the conveyor belt 104, and the thick potato strips and the medium potato strips move toward the small end of the conical drum 103;

[0059] S3, screening again, when the thick potato strips and the medium potato strips move toward the small end of the conical drum 103, the interval between the conical drum 103 and the conveyor belt 104 gradually increases, and the medium potato strips first enter the medium potato strip channel 302, and then the thick potato strips enter the thick potato strip channel 303.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screening device for French fries production, characterized in that: The screening support (101) comprises a screening support (101), one end of which is rotatably arranged on a mounting support (102), and the other end of which is connected to an adjustment mechanism (200); the mounting support (102) can be fixed on the ground; a conical roller (103) is rotatably arranged inside the screening support (101), the large end of the conical roller (103) faces the rotation center of the screening support (101); a conveyor belt (104) is arranged under the conical roller (103), and the conveyor belt (104) can be installed on the ground; One end of the conveyor belt (104) is an entrance, and the other end is an exit. A partition structure (300) is provided between the conveyor belt (104) exit and the conical roller (103). The partition structure (300) is mounted on the conveyor belt (104). The partition structure (300) is provided with three channels. A thin potato strip channel (301) is provided below the large end of the conical roller (103), a thick potato strip channel (303) is provided below the small end of the conical roller (103), and a medium potato strip channel (302) is provided between the thick potato strip channel (303) and the thin potato strip channel (301). A feeding track (105) is provided between the entrance of the conveyor belt (104) and the conical roller (103). The feeding track (105) is installed above the conveyor belt (104). The feeding track (105) is aligned with the thin potato strip channel (301). A flattening baffle (106) is provided at the entrance of the feeding track (105). The distance from the lower edge of the flattening baffle (106) to the upper surface of the conveyor belt (104) is the thickness of the thick potato strips.

2. A screening device for French fries production according to claim 1, characterized in that: The partition structure (300) comprises two side panels (304) and two partition panels (305); one side panel (304) is respectively installed on the left and right sides of the conveyor belt (104); a fixing rod (306) is fixed between the two side panels (304); a partition panel (305) is provided between the thin potato strip channel (301) and the medium potato strip channel (302) and between the medium potato strip channel (302) and the thick potato strip channel (303); and the partition panel (305) is fixed on the fixing rod (306).

3. The screening device for French fry production according to claim 1, characterized in that: The adjustment mechanism (200) comprises an adjustment arm (201) and a lifting block (203); the adjustment arm (201) is fixed to one end of the screening support (101) away from the rotation center thereof; an adjustment surface (202) is provided under the adjustment arm (201); the adjustment surface (202) is in contact with the lifting block (203); the rotation center of the screening support (101), the lower edge of the conical roller (103) and the adjustment surface (202) are located on the same straight line; the lifting block (203) is slidably arranged on the adjustment support (209); an adjustment screw (204) is rotatably arranged on the adjustment support (209); and the adjustment screw (204) is threadedly connected to the lifting block (203).

4. A screening device for French fry production according to claim 3, characterized in that: The adjusting surface (202) contacts an edge of the lifting block (203), and the edge is called the adjusting edge. The distance from the rotation center of the screening support (101) to the dividing line between the medium potato strip channel (302) and the thick potato strip channel (303) is R. The horizontal distance from the rotation center of the screening support (101) to the adjusting edge is 2R. The flattening baffle (106) is arranged at the entrance of the feeding track (105) for lifting. A pulley (205) is arranged on the flattening baffle (106) for rotating. A pulley (206) is arranged above the flattening baffle (106). The pulley (206) is rotatably arranged on a pulley bracket (208), and the pulley bracket (208) can be fixed on the ground. A C pulley (207) is rotatably arranged on the adjustment bracket (209). When the lifting block (203) rises, the distance between the lifting block (203) and the C pulley (207) can be increased. One end of a rope (210) is fixed on the pulley bracket (208), and the other end of the rope (210) first passes around the A pulley (205), then passes around the B pulley (206), and then passes around the C pulley (207) to be connected to the bottom of the lifting block (203).

5. The screening device for French fry production according to claim 1, characterized in that: Three sets of dredging mechanisms (400) are arranged at the partition structure (300), and one set of dredging mechanisms (400) is arranged at each channel. Each set of dredging mechanisms (400) comprises a dredging needle (401) and a dredging bracket (404). The dredging needle (401) is slidably arranged in the protective sleeve (402), one end of the protective sleeve (402) is rotatably arranged with one end of an A connecting rod (403), the other end of the A connecting rod (403) is rotatably arranged at one end of the dredging bracket (404), the other end of the dredging bracket (404) is rotatably arranged with one end of a B connecting rod (405), the other end of the B connecting rod (405) is rotatably arranged at the other end of the protective sleeve (402), the protective sleeve (402), the A connecting rod (403), the B connecting rod (405) and the dredging bracket (404) form a parallelogram, and the dredging bracket (404) can be fixed on the ground.

6. A screening device for French fry production according to claim 5, characterized in that: The dredging needle (401) is driven by a rigid chain (406); a driven sprocket (407) is rotatably provided at a rotatable connection between the protective sleeve (402) and the A connecting rod (403); a driving sprocket (408) is rotatably provided at a rotatable connection between the A connecting rod (403) and the dredging bracket (404); one end of the rigid chain (406) is fixed to the dredging needle (401); the other end of the rigid chain (406) passes through the driven sprocket (407) and the driving sprocket (408) and is fixed to a chain slider (409); and the chain slider (409) is slidably provided on the dredging bracket (404); For a parallelogram formed by the protective sleeve (402), the A connecting rod (403), the B connecting rod (405) and the dredging bracket (404), three chain baffles (410) are arranged on the outside of the parallelogram, and the three chain baffles (410) are respectively fixed to the protective sleeve (402), the A connecting rod (403) and the dredging bracket (404); an A limiting structure (411) is arranged outside the driven sprocket (407), and the A limiting structure (411) can prevent the rigid chain from falling off the driven sprocket (407); and a B limiting structure (412) is arranged outside the driving sprocket (408), and the B limiting structure (412) can prevent the rigid chain (406) from falling off the driving sprocket (408).

7. A screening device for making French fries according to claim 6, characterized in that: The driving sprockets (408) of the three dredging mechanisms (400) are fixed on a driving shaft (501), the driving shaft (501) is rotatably arranged on a connecting bracket (502), the connecting bracket (502) can be fixed on the ground, the dredging bracket (404) is fixed on the connecting bracket (502), the A connecting rods (403) of the three dredging mechanisms (400) are fixed on a connecting shaft (505), a driving bracket (503) is arranged on one side of the connecting bracket (502), one end of a driving telescopic rod (504) is rotatably arranged on the driving bracket (503), and the other end of the driving telescopic rod (504) is rotatably arranged on the A connecting rod (403) of any one of the dredging mechanisms (400), and the driving bracket (503) can be fixed on the ground.

8. The screening device for French fry production according to claim 1, characterized in that: A spiral protrusion (107) is fixed on the conical roller (103).

9. The screening device for French fry production according to claim 1, characterized in that: A feeding ramp (108) is fixed at the entrance of the feeding track (105).

10. A screening method using the screening device for French fries production according to any one of claims 1 to 9, characterized in that: The steps include: S1, flattening, the unscreened potato strips raw material enters the conveyor belt (104) from the feeding track (105), and when passing through the flattening baffle (106), the accumulated potato strips are blocked by the flattening baffle (106), so that the potato strips raw material is flattened into a layer; S2, initial screening, the potato strips passing through the flattening baffle (106) first arrive below the large end of the conical roller (103), and the thin potato strips leave from the gap between the large end of the conical roller (103) and the conveyor belt (104) and enter the thin potato strip channel (301). Since the distance between the large end of the conical roller (103) and the conveyor belt (104) is smaller than the thickness of the thick potato strips and the medium potato strips, the thick potato strips and the medium potato strips cannot pass through the gap between the large end of the conical roller (103) and the conveyor belt (104), and the thick potato strips and the medium potato strips move toward the small end of the conical roller (103); S3, screening again, when the thick potato strips and the medium potato strips move toward the small end of the conical roller (103), the interval between the conical roller (103) and the conveyor belt (104) gradually increases, and the medium potato strips first enter the medium potato strip channel (302), and then the thick potato strips enter the thick potato strip channel (303).

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