Abrasive belt timing device and automatic grinding apparatus

Abstract

The present application aims to provide a belt timing device and an automatic grinding equipment containing the same, which can time the actual use length of the belt, so that the operator can know the use length and replace the belt. The belt timing device comprises an image acquisition unit arranged near the belt and used for acquiring images of the belt, a replacement judging unit used for judging whether the belt is replaced according to the images of the belt acquired by the image acquisition unit, a timing unit used for accumulating the use length of the belt, and a timing control unit used for controlling the timing unit to reaccumulate when the replacement judging unit judges that the belt is replaced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of grain processing machinery, and particularly relates to a sand belt timing device for timing the use time of a sand belt in an automatic milling device and an automatic milling device comprising the sand belt timing device. BACKGROUND

[0002] Rice and other grains are often processed using milling devices. For example, after the husks of the grains are removed to obtain brown rice, the brown rice is milled to remove the skin and germ to form white rice.

[0003] There are some sand belt milling devices that use sand belts to perform the above-mentioned milling in the prior art. For example, CN202022282141.0 and CN202022281026.1 both adopt a structure in which a sand belt is sleeved on a main roller and a plurality of rice chambers are arranged around the outer side of the sand belt. In this structure, the sand surface of the sand belt faces the outer side of the rice chamber. Therefore, when the main roller drives the sand belt to move, the sand surface can rub against the grains in the rice chamber to mill off the surface layer of the grains, thereby achieving grain milling.

[0004] In the above-mentioned devices, the sand surface of the sand belt will lose its milling effect after being used for a period of time, for example, a few months. Therefore, the sand belt needs to be replaced regularly. However, since the replacement interval is relatively long, and there are usually multiple milling devices in a grain processing plant, it is difficult for the operator to keep track of the use time of the sand belt of each milling device. Therefore, it is also difficult to accurately determine the replacement time of the sand belt of each device. In addition, different milling devices may be used in different milling processes. These differences cause the actual working conditions of each milling device to be different, for example, the milling frequency and the duration of each milling are different. These differences will cause the use of the sand belt of each milling device to be different. Therefore, simply replacing the sand belt according to a predetermined interval cannot meet the replacement needs of the sand belt. SUMMARY

[0005] To solve the above-mentioned problems, the present application provides a sand belt timing device that can time the actual use time of the sand belt so that the operator can accurately know the use time and replace the sand belt. The present application adopts the following technical solutions:

[0006] The present application provides a sand belt timing device for timing the use time of a sand belt arranged in an automatic milling device for milling. The sand belt timing device comprises: an image acquisition unit arranged near the sand belt for acquiring images of the sand belt; a replacement judgment unit for judging whether the sand belt is replaced according to the sand belt images acquired by the image acquisition unit; a timing unit for accumulating the use time of the sand belt; and a timing control unit for controlling the timing unit to re-accumulate when the replacement judgment unit judges that the sand belt is replaced.

[0007] Further, the sand belt timing device provided by the present application can further comprise a replacement judging part, which can comprise: an image temporary storage unit, configured to temporarily store the sand belt images collected by the image collecting part in time sequence; a dismounting judging unit, configured to judge whether the sand belt is dismounted or mounted; an identification judging unit, configured to judge whether the sand belts in the sand belt images before and after the dismounting time point are the same sand belt; and a judging control unit, configured to control the identification judging unit to judge whether the sand belts in the sand belt images before and after the dismounting time point are the same sand belt when the dismounting judging unit judges that the sand belt is dismounted and mounted again, and to judge that the sand belt is replaced when the sand belts are judged to be different.

[0008] Further, the sand belt timing device provided by the present application can further comprise a replacement judging part, which can comprise: an image temporary storage unit, configured to temporarily store the sand belt images collected by the image collecting part in time sequence; a dismounting judging unit, configured to judge whether the sand belt is dismounted or mounted; an identification judging unit, configured to judge whether the sand belts in the sand belt images before and after the dismounting time point are the same sand belt; and a judging control unit, configured to control the identification judging unit to judge whether the sand belts in the sand belt images before and after the dismounting time point are the same sand belt when the dismounting judging unit judges that the sand belt is dismounted and mounted again, and to judge that the sand belt is replaced when the sand belts are judged to be different.

[0009] In addition, the image collecting part in the present application can be installed to face the sand surface of the sand belt, so as to collect the image of the sand surface.

[0010] The sand belt timing device provided by the present application can further comprise a judging and warning part, configured to give a warning at least when the use time of the sand belt exceeds the predetermined time.

[0011] Further, the judging and warning part can comprise: a predetermined time storage unit, configured to store the predetermined time; an overtime judging unit, configured to judge whether the use time exceeds the predetermined time; and an overtime warning unit, configured to give a warning when the overtime judging unit judges that the use time exceeds the predetermined time.

[0012] Further, the judging and warning part can further comprise: a warning control unit, a grinding time recording unit, a grinding time average calculating unit and a replacement warning unit, the grinding time recording unit is configured to record the grinding time of each grinding process, the warning control unit is configured to control the grinding time average calculating unit to calculate the average value of each grinding process according to the record of the grinding time recording unit when each grinding process is completed, to control the overtime judging unit to judge whether the sum of the use time and the average value exceeds the predetermined time, and to control the replacement warning unit to give a warning when the overtime judging unit judges that the use time exceeds the predetermined time.

[0013] In addition, the application further provides an automatic milling equipment for milling grains, characterized by comprising: a milling device having a main roller, a main roller driving mechanism for driving the main roller to rotate, a sand belt driven by the main roller, a plurality of whitening chambers for containing grains and cooperating with the sand belt to realize milling, and a discharging mechanism for discharging the grains milled by the whitening chambers; and a sand belt timing device for timing the use time of the sand belt, wherein the sand belt timing device is the sand belt timing device according to any one of the above.

[0014] Invention action and effect

[0015] According to the sand belt timing device and the automatic milling equipment provided by the application, the image acquisition part can acquire the image of the sand belt, the replacement judgment part can judge whether the sand belt is replaced based on the acquired image of the sand belt, and the timing control part controls the timing part to reaccumulate when the sand belt is replaced, so that the use time of each sand belt after replacement can be automatically obtained, and the problem of omission when the operator records the use time by himself can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural block diagram of the milling equipment of the embodiment of the application;

[0017] Figure 2 is a side view structural diagram of the milling equipment of the embodiment of the application;

[0018] Figure 3 is a perspective structural diagram of the milling equipment of the embodiment of the application;

[0019] Figure 4 is a top view structural diagram of the milling equipment of the embodiment of the application;

[0020] Figure 5 is a structural diagram of the whitening chamber of the embodiment of the application;

[0021] Figure 6 is a perspective structural diagram of the discharging assembly of the milling cavity of the embodiment of the application;

[0022] Figure 7 is a perspective structural diagram of the whitening chamber and the discharging adjusting assembly in the cooperating state of the embodiment of the application;

[0023] Figure 8 is a sectional view structural diagram of the whitening chamber and the discharging adjusting assembly in the cooperating state of the embodiment of the application;

[0024] Figure 9 is a structural block diagram of the sand belt timing device of the embodiment of the application;

[0025] Figure 10 is an action flow chart of the milling process of the embodiment of the application.

[0026] Figure: automatic milling equipment 100; milling mechanism 1; frame 11; base 111; stand 112; top cover 113; main roller 12; main cylinder 121; main roller shaft 122; tension roller 13; sand belt 14; milling chamber 15; milling cavity 151; discharge channel 152; feeding port 153; discharge port 154; discharge pipeline 16; bran discharge channel 17; fan 18; hopper 2; main roller driving mechanism 3; feeding mechanism 4; discharging mechanism 5; discharging mounting table 50; outlet portion 51; rotating plate 52; reset member 53; poking member 54; rotating disc 55; notch 55a; shaft coupling 56; driving member 57; push rod 58; proximity switch one 59; proximity switch two 60; sand belt timing device 6; image acquisition portion 61; replacement judgment portion 62; image temporary storage unit 621; disassembly judgment unit 622; identification judgment unit 623; judgment control unit 624; timing portion 63; milling current acquisition unit 631; accumulation unit 632; milling current judgment unit 633; timing control unit 634; judgment warning portion 64; predetermined time length storage unit 641; overtime judgment unit 642; overtime warning unit 643; milling time length recording unit 644; milling time length average value calculation unit 645; replacement warning unit 646; warning control unit 647; timing control portion 65; platform 200. DETAILED DESCRIPTION

[0027] The specific embodiments of the present application will be described below in conjunction with the accompanying drawings and examples.

[0028] <Embodiment>

[0029] The present embodiment provides an automatic milling equipment for milling grains.

[0030] Figure 1 is a structural diagram of the automatic milling equipment of the present embodiment, Figure 2 is a side view structural diagram of the automatic milling equipment of the present embodiment, Figure 3 is a perspective structural diagram of the automatic milling equipment of the present embodiment.

[0031] As Figures 1-3 shown, the automatic milling equipment 100 comprises a milling mechanism 1, a hopper 2, a main roller driving mechanism 3, a feeding mechanism 4, a discharging mechanism 5, a sand belt timing device 6, and a control device 7.

[0032] The hopper 2 is arranged above the milling mechanism 1 and is fixed by a support structure such as a support frame or a support column (not shown in the support structure diagram, and the hopper 2 is not shown in the Figure 3 The conveying outlet of the conveying mechanism 30 is connected to the inlet of the hopper 2, so that the grain elevator can input the grains from the upstream equipment into the hopper 2.

[0033] The milling mechanism 1 comprises a rack 11, a main roller 12, a tension roller 13, a sand belt 14 and a plurality of whitening chambers 15.

[0034] The rack 11 has a base 111, a column 112 and a top cover 113.

[0035] Figure 4 is a top view of the milling equipment according to an embodiment of the present application, Figure 4 The silo 2 and the feeding mechanism 4, the whitening chamber 15 and the top cover 113 are omitted.

[0036] As shown in Figures 1-4 The base 111 is in the shape of a rectangular plate and is used to support the entire milling mechanism 1.

[0037] As shown in Figure 2 In this embodiment, the milling equipment 10 is arranged on a platform 200 above the ground in a production workshop, so the base 111 is placed on the upper surface of the platform 200.

[0038] The column 112 is in the shape of a hollow column with a cross section approximately in the shape of a rectangle, is arranged on the base 11 and is located at two adjacent corner positions of the base 111.

[0039] The top cover 113 is arranged across the top ends of the two columns 112 and covers the two columns 112.

[0040] The main roller 12 comprises a main cylinder 121 in the shape of a cylinder and a main roller shaft 122. The main cylinder 121 is in the shape of a cylinder, is arranged at the top of the discharge mounting table 50, extends in the vertical direction and has an end face parallel to the horizontal plane.

[0041] The main roller shaft 122 is arranged at the axis of the main cylinder 121 and is fixedly connected with the main roller 12.

[0042] In this embodiment, the main roller driving mechanism 3 is an electric motor, the output end of which is fixedly connected with the main roller shaft 122 and can drive the main roller shaft 122 to rotate, thereby driving the main cylinder 121 to rotate.

[0043] The tension roller 13 is arranged at a position on one side of the main roller 12 and has an axis substantially parallel to the axis of the main roller 12.

[0044] The sand belt 14 is sleeved outside the main cylinder 121 of the main roller 12 and the tension roller 13 and has a rough surface (i.e., a sand surface) on the outer side surface thereof, which is used to contact the grains and mill the grains. In addition, a sand belt deflection adjusting device can also be arranged at the tension roller 13 to prevent the sand belt from deviating, and the specific structure and working principle thereof can adopt the patent CN 202021909873.1 previously applied by the applicant, which will not be described here again.

[0045] The feeding mechanism 4 is arranged at the top of the main cylinder 121, and has a conical appearance with a small top and a large bottom, and is internally provided with a plurality of feeding passages formed by partitions; the top of the feeding mechanism 4 is connected with the silo 2 through a feeding pipeline, so that the grains in the silo 2 can enter the feeding mechanism 4 and be divided into multiple paths by the feeding passages.

[0046] The outer side of the sand belt 14 of the circumferential surface of the main cylinder 121 is provided with a plurality of grinding chambers 15 close to the sand belt 14 and arranged uniformly in the circumferential direction. In the embodiment, the number of the grinding chambers 15 and the number of the feeding passages are both 12, and each grinding chamber 15 corresponds to one feeding passage. In addition, as shown in the figure, the distribution positions of the grinding chambers 15 correspond to the parts of the sand belt 14 and the main cylinder 121 that are close to each other, while the part of the sand belt 14 close to the tensioning cylinder 13 is not provided with the grinding chamber 15; at the same time, the part of the sand belt 14 between the tensioning cylinder 13 and the main cylinder 121 is not close to any component and is in a "suspended" state without support, and this part is also not provided with the grinding chamber 15. Figure 3

[0047] Figure 5 It is a structure diagram of the grinding chamber of the embodiment of the application.

[0048] As shown in the figure, the grinding chamber 15 is used for accommodating grains and cooperating with the sand belt 14 to grind the grains, and has a grinding cavity 151, a discharge passage 152, a feeding port 153 and a discharge port 154. Figure 5 The grinding cavity 151 is a passage structure extending in the vertical direction and has three flat plates connected in sequence, and the structure formed by the three flat plates has a trapezoidal cross section, and the longer bottom of the trapezoid is an opening, which faces the sand belt 14, so as to be able to cooperate with the sand belt 14.

[0049] The discharge passage 152 is arranged at the bottom of the grinding cavity 151, and the upper end thereof is in communication with the bottom end of the grinding cavity 151.

[0050] The feeding port 153 is arranged at the top of the grinding cavity 151, and the upper part thereof is in communication with the bottom end of the corresponding feeding passage, and the lower part thereof is in communication with the top end of the grinding cavity 151.

[0051] The discharge port 154 is arranged at the bottom of the discharge passage 152 and is in communication with the bottom end of the discharge passage 152.

[0052]

[0053] ​​In the embodiment, the discharging mechanism 5 is used for discharging the ground grains in the whitening chamber 15, and includes a plurality of grinding cavity discharging assemblies, a discharging adjusting assembly, and a discharging mounting table 50 accommodating the grinding cavity discharging assemblies and the discharging adjusting assembly. The discharging mounting table 50 is arranged on the base 111 and is in the form of a hollow column with an arc cross section with an arc greater than 60°. The number of the grinding cavity discharging assemblies is the same as that of the whitening chamber 15, i.e., 12, and each of the grinding cavity discharging assemblies corresponds to one of the whitening chamber 15.

[0054] Figure 6 Fig. 4 is a perspective view of the grinding cavity discharging assembly of the embodiment of the present application.

[0055] As shown in Figs. 4 and 5, each of the grinding cavity discharging assemblies includes an outlet portion 51, a rotating plate 52, a reset member 53, and a pushing member 54. Figure 6

[0056] The outlet portion 51 is in the form of a rectangular frame and is arranged at a lower end position in the whitening chamber 15. The upper portion of the outlet portion 51 is in communication with the grinding cavity 151, and the lower portion of the outlet portion 51 is in communication with the discharging passage 152.

[0057] The rotating plate 52 is a flat plate that can rotate about a horizontal axis and has a rotating end rotatably arranged in the outlet portion 51 and a free end opposite to the rotating end. Specifically, the rotating end is rotatably arranged in the outlet portion 51 close to the inner wall through a pin shaft.

[0058] The reset member 53 is a torsion spring arranged on the pin shaft of the rotating plate 52 and provides a spring force to the rotating plate 52 to make the rotating plate 52 tightly adhere to the outlet portion 51.

[0059] The pushing member 54 is arranged below the rotating plate 52 close to one side of the rotating end. The pushing member 54 can contact the lower surface of the rotating plate 52 and push the rotating plate 72 to rotate towards the edge of the outlet portion 51.

[0060] Figure 7 Fig. 6 is a perspective view of the cooperation between the whitening chamber and the discharging adjusting assembly in the embodiment of the present application, and Fig. 7 is a sectional view of the cooperation between the whitening chamber and the discharging adjusting assembly in the embodiment of the present application. Figure 7 Fig. 6 shows the cooperation between one of the whitening chambers 15 and the discharging adjusting assembly. Figure 8 Fig. 7 shows the cooperation between one of the whitening chambers 15 and the discharging adjusting assembly.

[0061] As shown in Figs. 6 and 7, the discharging adjusting assembly includes a rotating disc 55, a shaft coupling 56, a push rod 58, a proximity switch 1 59, a proximity switch 2 60, and a driving member 57. Figure 7 Figure 8

[0062] ​​​The rotating disc 55 is installed at the bottom of the main roller 12, and its axis is coincident with the axis of the main roller 12. The edge of the rotating disc 55 is provided with a plurality of notches 55a, each of which corresponds to the position of the pusher 54 and is engaged with the pusher 54.

[0063] When the rotating disc 55 rotates clockwise or counterclockwise, the pusher 54 can be pushed to move leftward or rightward in the rotating disc 55, so as to increase or decrease the angle formed between the rotating plate 52 and the outlet portion 51, increase or decrease the opening formed therebetween, and increase or decrease the flow rate of the grain flowing out of the grinding cavity 151. That is, the function of adjusting the discharge flow rate is achieved. Figure 8

[0064] The shaft 56 is fixedly connected to the bottom of the rotating disc 55 and extends downward from the bottom surface of the rotating disc 55.

[0065] The push rod 58 is arranged on one side of the shaft 56 and connected to the shaft 56. The push rod 58 can push the shaft 56 to swing in the horizontal direction, so as to drive the rotating disc 55 to rotate clockwise or counterclockwise in the horizontal plane.

[0066] The driving member 57 is an electric motor, which can drive the push rod 58 to move, and in turn push the shaft 56 to move.

[0067] The proximity switch one 59 is arranged below the rotating disc 55 and corresponds to the position of the shaft 56 when the rotating plate 52 is completely attached to the outlet portion 51 (i.e., the opening between them is closed). The proximity switch one 59 can sense the distance between the shaft 56 and the proximity switch one 59 and form a corresponding electrical signal.

[0068] The proximity switch two 60 is arranged below the rotating disc 55 and corresponds to the position of the shaft 56 when the rotating plate 52 is farthest away from the outlet portion 51 (i.e., the grinding opening is completely open). The proximity switch two 60 can sense the distance between the shaft 56 and the proximity switch two 60 and form a corresponding electrical signal.

[0069] That is, the positions of the proximity switch one 59 and the proximity switch two 60 correspond to the starting point and the ending point of the stroke in the process of the grinding opening from being completely closed to being completely open, respectively. According to the electrical signals of the two, the current position of the shaft 56 and the rotating degree of the rotating disc 55 can be determined, and in turn the opening degree of the grinding opening can be obtained and feedback control can be performed according to the opening degree. The specific control can be achieved by setting a control module to receive the electrical signals of the proximity switch one 59 and the proximity switch two 60, and send corresponding control electrical signals to the driving member 57. The specific feedback control principle can be set according to actual needs, and will not be described here.

[0070] ​The discharge mounting table 50 is internally provided with a plurality of discharge passages (not shown in the figure), the number of which is 12, which are distributed in a circumferential manner and correspond to the positions of each of the milling rooms 15. Each of the discharge passages is approximately tubular, and the upper end of each of the discharge passages is connected to the lower end of the outlet portion 51, so that the grains in the milling cavity 151 can flow downward through the outlet portion 51 into the discharge passage.

[0071] The lower portion of the discharge mounting table 50 is also provided with a discharge pipeline 16, which extends downward through the base 111 to the lower portion of the platform 200. The lower end of each of the discharge passages is connected to the discharge pipeline 16, so that the grains that have been milled in the milling room 15 can flow into the discharge pipeline 16 and be output through the discharge pipeline 16.

[0072] In addition, in the present embodiment, the lower portion of the discharge mounting table 50 is also provided with a bran discharge passage 17, the upper end of which is connected to the bottom of the discharge mounting table 50. The bran formed after the sand belt 14 is milled falls directly into the discharge mounting table 50 and is collected and discharged by the bran discharge passage 17. A fan 18 is also provided on the bran discharge passage 17, which is used to draw air from the bran discharge passage 17 to facilitate the discharge of the bran from the bran discharge passage 17.

[0073] Figure 9 is a structural block diagram of the sand belt timing device of the present embodiment.

[0074] As shown in Figure 1 , 9 , the sand belt timing device 6 includes an image acquisition portion 61, a replacement judgment portion 62, a timing portion 63, a judgment warning portion 64, and a timing control portion 65.

[0075] As shown in Figure 3 , the image acquisition portion 61 is arranged in the vicinity of the sand belt 14. In the present embodiment, the image acquisition portion 61 is a camera, which is mounted on the outer side of the sand belt 14 at a position where no milling room 15 is distributed by a support. In addition, the camera lens of the image acquisition portion 61 faces the sand belt 14, i.e., the outer sand surface of the sand belt 14, so that the image acquisition portion 61 can acquire the image of the sand surface of the sand belt 14 as a sand belt image. The sand belt image of the present embodiment is acquired in an interval acquisition manner, i.e., the image acquisition portion 61 acquires the image of the sand surface of the sand belt 14 to obtain the sand belt image after a predetermined interval time, which can be any one of 5 minutes to 30 minutes.

[0076] The replacement judgment portion 62 is used to judge whether the sand belt 14 has been replaced, and includes an image temporary storage unit 621, a dismounting judgment unit 622, an identification judgment unit 623, and a judgment control unit 624.

[0077] The image temporary storage unit 621 is configured to temporarily store the belt images collected by the image collection unit 61 in chronological order. In the present embodiment, the image temporary storage unit 621 stores the belt images within 12 hours and deletes the belt images older than 12 hours.

[0078] The dismounting judgment unit 622 is configured to judge whether the belt 14 is dismounted or mounted. In the present embodiment, as shown in FIG. 3, the dismounting judgment unit 622 includes an infrared distance sensor 6221 mounted on the bracket outside the overhanging portion of the belt 14, which is aligned with the outer side of the belt 14 to measure the distance in real time. When the belt 14 is not dismounted, the infrared distance sensor 6221 measures the distance between the infrared distance sensor 6221 and the surface of the belt 14. Once the belt 14 is dismounted, the infrared distance sensor 6221 cannot detect the belt 14 because the infrared distance sensor 6221 corresponds to the overhanging portion of the belt 14, so that the detection result changes (at this time, the distance between the infrared distance sensor 6221 and the column 112 or the main roller 121 is generally measured, i.e., the distance measurement result becomes longer), and the dismounting judgment unit 622 judges that the belt 14 is dismounted. When the belt 14 is mounted again, the infrared distance sensor 6221 can measure the distance between the infrared distance sensor 6221 and the surface of the belt 14 again, and the dismounting judgment unit 622 judges that the belt 14 is mounted again. That is, the dismounting judgment unit 622 judges the dismounting and mounting actions of the belt 14 according to the distance change, and judges that the belt 14 is dismounted when the distance measurement result becomes longer, and judges that the belt 14 is mounted in the opposite case.

[0079] The identification judgment unit 623 is configured to judge whether the belt 14 in different belt images is the same belt. Specifically, the identification judgment unit 623 can be obtained by training the image recognition model in the prior art with different belt images, so that whether the belt in different belt images is the same belt can be judged based on the image features.

[0080] The judgment control unit 624 is configured to control the operation of the above-mentioned components in the replacement judgment unit 62 and draw a conclusion on whether the belt 14 is replaced. Specifically, when the dismounting judgment unit 622 judges that the belt 14 is dismounted and mounted again, the judgment control unit 624 controls the identification judgment unit 623 to obtain any one of the belt images before the dismounting time point and any one of the belt images after the mounting time point from the image temporary storage unit 621, and judges whether the belt 14 in the two obtained belt images is the same belt. When it is judged that the belt 14 is not the same belt, it is judged that the belt 14 is replaced. In addition, when it is judged that the belt 14 is the same belt, it is indicated that it is a routine maintenance rather than a belt replacement, and the use time of the belt 14 does not need to be recalculated.

[0081] The timing unit 63 is configured to accumulate the use time of the abrasive belt 14, and includes a grinding current acquisition unit 631, an accumulation unit 632, a grinding current judgment unit 633, and a timing control unit 634.

[0082] The grinding current acquisition unit 631 is configured to acquire the grinding current of the main roller driving mechanism 3 in real time. In this embodiment, the grinding current acquisition unit 631 includes three parts, i.e., a current value acquisition part, a no-load current value storage part, and a grinding current value calculation part.

[0083] The current value acquisition part is configured to acquire the current working current value of the main roller driving mechanism 3 during the working process. In this embodiment, the current value acquisition part is arranged in the frequency converter of the motor constituting the main roller driving mechanism 3, so as to directly acquire the current working current value.

[0084] The no-load current value storage part stores the no-load current value. In this embodiment, the no-load current value storage part is a temporary storage part. After the equipment is powered on, the main roller driving mechanism 3 is operated for a short time (for example, 3s-5s) before the grinding starts (i.e., before the feed valve is opened), which is equivalent to operating for a short time in the no-load state without grains. The current working current value of the main roller driving mechanism 3 acquired by the current value acquisition part during this period (which can be the average value of the current working current value during this period) is the no-load current value, and the no-load current value storage part temporarily stores the no-load current value.

[0085] The grinding current value calculation part is configured to calculate the grinding current value. Specifically, the grinding current value calculation part subtracts the no-load current value stored in the no-load current value storage part from the current working current value obtained by the current value acquisition part at different time points during the grinding process, so as to obtain the grinding current value at different time points. The grinding current value reflects the working load of the main roller driving mechanism 3, and is less than a certain value, which indicates that there is no grain in the grinding chamber 15, or the amount of grain is too small, so that the grinding cannot be formed even if the abrasive belt 14 moves.

[0086] The accumulation unit 632 is configured to accumulate the use time of the abrasive belt 14.

[0087] The grinding current judgment unit 633 is configured to judge whether the grinding current is higher than a predetermined grinding current threshold value. In this embodiment, the grinding current threshold value is the minimum grinding current value when the abrasive belt 14 forms the grinding of the grains, and can be obtained by testing during the operation of the equipment. Generally, the grinding current threshold value is 2V.

[0088] The time counting control unit 634 controls the operation of the above-mentioned components in the time counting section 63. Specifically, when the grinding current judging unit 633 judges that the grinding current obtained by the grinding current obtaining unit 631 is higher than the working current, the time counting control unit 634 controls the accumulation unit 632 to accumulate, and when the grinding current is lower than the working current, the time counting control unit 634 controls the accumulation unit 632 to suspend the accumulation. In addition, when the replacement judging section 62 judges that the abrasive belt 14 is replaced, the time counting control unit 634 also controls the accumulation unit 632 to clear the time length value stored therein and re-accumulate under the control of the time counting control section 65.

[0089] The warning judging section 64 is used to issue a warning, including a predetermined time length storage unit 641, an overtime judging unit 642, an overtime warning unit 643, a grinding time length recording unit 644, a grinding time length average calculating unit 645, a replacement warning unit 646, and a warning control unit 647.

[0090] The predetermined time length storage unit 641 stores a predetermined time length value, which is the time length value at which the abrasive belt 14 should be replaced after being used. In this embodiment, the predetermined time length value is a fixed value set in advance. Alternatively, in other embodiments, time length values corresponding to different abrasive belt 14 models or different grinding varieties can be stored, and the operator selects the model or grinding variety through an additional touch display screen after replacing the abrasive belt 14, so as to use the corresponding time length value. As another alternative, a touch display screen can be provided for the operator to directly input a time length value, and the predetermined time length storage unit 641 stores the input time length value as the predetermined time length value.

[0091] The overtime judging unit 643 is used to judge whether the use time length exceeds the predetermined time length. That is, every certain period of time, it is judged whether the use time length value accumulated by the accumulation unit 632 is greater than the predetermined time length value stored in the predetermined time length storage unit 641. In addition, the overtime judging unit 643 is also used to judge whether the sum of the use time length and the grinding time length average exceeds the predetermined time length.

[0092] The overtime warning unit 644 is used to issue a warning when the overtime judging unit 643 judges that the time exceeds. In this embodiment, the overtime warning unit 644 is an LED lamp provided on the stand 112, and when the overtime judging unit 643 judges that the use time length value is greater than the predetermined time length value, the overtime warning unit 644 issues a warning in the form of color change (e.g., from green to red) or light emission (e.g., from no light emission to light emission) to remind the operator that the abrasive belt 14 should be replaced.

[0093] The grinding duration recording unit 644 is used to record the grinding duration of each grinding process, i.e. the duration from the start of grinding to the end of grinding. Specifically, the main roller driving mechanism 3 starts to work and the grinding current judging unit judges that the grinding current value is greater than the grinding current threshold value, which means that the grinding process starts. When the main roller driving mechanism 3 stops working, it means that the grinding process ends. The grinding duration recording unit 644 records the duration from the start of each grinding process to the end of the grinding process as the grinding duration, and in this embodiment, the grinding duration recording unit 644 records the grinding duration of the last 20 grinding processes.

[0094] The grinding duration average calculating unit 645 is used to calculate the grinding duration average according to the recording content of the grinding duration recording unit 644. In this embodiment, the grinding duration average calculating unit 645 adds the grinding duration of the last 20 grinding processes in the grinding duration recording unit 644 and divides the sum by 20, which means that the grinding duration average of the 20 grinding processes is obtained. Thus, when each grinding process ends, the overtime judging unit 643 can add the use duration value accumulated by the accumulation unit 632 to the grinding duration average, and then judge whether the sum is greater than the predetermined duration value stored in the predetermined duration storage unit 641. Generally, when it is judged that the sum is greater than the predetermined duration value, it means that the use duration of the abrasive belt 14 in the next grinding process is likely to exceed the predetermined duration value, and it can be considered to be replaced in advance.

[0095] The replacement warning unit 646 is used to issue a warning indicating that the abrasive belt 14 should be replaced in advance when the sum of the use duration value and the grinding duration average judged by the overtime judging unit 643 is greater than the predetermined duration value. In this embodiment, the replacement warning unit 646 and the overtime warning unit 644 are the same in structure, which are LED lamps arranged on the stand column 112.

[0096] The warning control unit 647 is used to control the work of each component in the warning unit 64.

[0097] The timing judging unit 65 is used to control the work of each component in the abrasive belt timing device 6.

[0098] In this embodiment, the control device 7 is used to control the work of the automatic grinding device 100 as a whole, including starting the grinding process to control the main roller driving mechanism 3 to start rotating, the feeding valve and the discharging mechanism 5 to open, etc., and ending the grinding process to control the main roller driving mechanism 3 to stop rotating, the feeding valve and the discharging mechanism 5 to close, etc.

[0099] Figure 10 is the action flow chart of the abrasive belt timing of the embodiment of the present application.

[0100] As Figure 10As shown, the working process of the automatic grinding device 100 of the present embodiment is as follows during each grinding process.

[0101] Step S1, the control device 7 controls to start grinding, and then enters step S2.

[0102] Step S2, the timing control part 65 controls the replacement judgment part 62 to judge whether the abrasive belt 14 is replaced or not, and enters step S3 when judged to be replaced, and enters step S4 when judged to be not replaced.

[0103] Step S3, the timing control part 65 controls to clear the accumulated time length in the accumulation unit 632, and then enters step S4.

[0104] Step S4, the grinding current acquisition unit 631 acquires the grinding current of the main drum driving mechanism 3 in real time, and then enters step S5.

[0105] Step S5, the grinding current judgment unit 633 judges whether the grinding current is higher than the predetermined grinding current threshold value, and enters step S6 when judged to be higher, and enters step S7 when judged to be not higher.

[0106] Step S6, the timing control unit 634 controls the accumulation unit 632 to accumulate, and then enters step S8.

[0107] Step S7, the timing control unit 634 controls the accumulation unit 632 to suspend accumulation, and then returns to step S4.

[0108] Step S8, the warning control unit 647 controls the overtime judgment unit 642 to judge whether the use time length exceeds the predetermined time length, and enters step S9 when judged to exceed, and enters step S10 when judged to not exceed.

[0109] Step S9, the overtime warning unit 644 issues a warning, and then returns to step S4.

[0110] Step S10, the timing control part 65 judges whether the device is stopped running (which can be realized by acquiring a running stop signal from the control device 7), and returns to step S4 when judged to be not stopped running, and enters step S11 when judged to be stopped running.

[0111] Step S11, the grinding time length recording unit 644 records the grinding time length of the present grinding process, and then enters step S12.

[0112] Step S12, the grinding time length average calculation unit 645 calculates the grinding time length average, and then enters step S13.

[0113] Step S13, the warning control unit 647 controls the overtime determination unit 642 to determine whether the sum of the use time length and the average grinding time length exceeds the predetermined time length, and when it is determined that it exceeds, it proceeds to step S14, and when it is determined that it does not exceed, it proceeds to the end state.

[0114] Step S14, the warning control unit 647 controls the replacement warning unit 646 to issue a warning indicating that it is time to replace, and then proceeds to the end state.

[0115] Effects of the Embodiments

[0116] The belt timing device and the automatic grinding device provided by the embodiments can automatically obtain the use time length of each belt after replacement, and avoid the problem of mistakes and omissions when an operator manually records the use time length, because the image acquisition part can acquire the belt image, the replacement determination part can determine whether the belt is replaced based on the acquired belt image, and the timing control part controls the timing part to re-accumulate when the belt is replaced.

[0117] In the embodiments, the replacement determination part includes a dismounting determination unit that can determine whether the belt is dismounted or mounted, so that the replacement determination part can accurately determine whether the belt is replaced according to the dismounting action and the belt images before and after the action, so that the accumulation of the use time length is more accurate, and the operator does not need to manually reset the time length accumulation.

[0118] The timing part of the embodiments includes a grinding current acquisition unit and a grinding current determination unit, so that the accumulation unit can only accumulate when the grinding current exceeds the grinding current threshold, avoiding the time when the belt is not actually working from being accumulated, so that the use time length obtained by accumulation is more accurate.

[0119] In addition, the determination warning part has a predetermined time length storage unit, an overtime determination unit, and an overtime warning unit, so that it can immediately issue an overtime warning when the use time length exceeds the predetermined time length, so as to effectively warn the operator and avoid the use of the belt after the expiration. Because the determination warning part also has a grinding time length recording unit and an average grinding time length calculation unit, it can record the time length of each grinding process, and determine whether the sum of the use time length and the average grinding time length is greater than the predetermined time length when the grinding is completed, so as to predict whether the expiration problem is likely to occur during the next grinding process, and further issue a replacement warning through the replacement warning unit when possible.

[0120] The above embodiments are used to illustrate the protection scope of the present application, but the protection scope of the present application is not limited to the scope described in the above embodiments.

[0121] In the embodiment, the predetermined time length value stored in the predetermined time length storage unit is a fixed value set in advance. Alternatively, in other embodiments, time length values corresponding to different abrasive belt models or different grinding varieties can also be stored, and the operator selects the model or grinding variety through an additional touch display screen after each replacement of the abrasive belt, so as to use the corresponding time length value. As another alternative, a touch display screen can also be provided for the operator to directly input a time length value, and the input time length value is stored as the predetermined time length value by the predetermined time length storage unit.

[0122] In the embodiment, the identification determination unit adopts an image recognition model in the prior art. However, since the abrasive belts of different service time lengths usually present different sand surface colors due to reasons such as wear and fur powder adsorption, a relatively simple color comparison analysis method can also be used to determine whether the abrasive belts in different abrasive belt images are the same.

Claims

1. A belt timer for timing the length of use of a belt provided in an automatic grinding apparatus for grinding, characterized by, The automatic grinding device comprises: an image acquisition unit arranged near the abrasive belt and configured to acquire images of the abrasive belt; a replacement judgment unit configured to judge whether the abrasive belt is replaced according to the images acquired by the image acquisition unit; a time counting unit configured to count the use time of the abrasive belt; a time counting control unit configured to control the time counting unit to restart counting when the replacement judgment unit judges that the abrasive belt is replaced; and a judgment warning unit configured to issue a warning at least after the use time of the abrasive belt exceeds a predetermined time. The automatic grinding device further comprises a main roller for driving the abrasive belt to move, and a main roller driving mechanism for driving the main roller to rotate and comprising an electric motor. The time counting unit comprises: a grinding current acquisition unit configured to acquire the grinding current of the main roller driving mechanism in real time; a counting unit configured to count the use time; a grinding current judgment unit configured to judge whether the grinding current is higher than a predetermined grinding current threshold; and a time counting control unit configured to control the counting unit to count when the grinding current judgment unit judges that the grinding current is higher than the grinding current threshold. The judgment warning unit comprises a predetermined time storage unit, an overtime judgment unit, an overtime warning unit, a warning control unit, a grinding time recording unit, a grinding time average calculation unit, and a replacement warning unit. The predetermined time storage unit stores the predetermined time. The overtime judgment unit judges whether the use time exceeds the predetermined time. The overtime warning unit issues a warning when the overtime judgment unit judges that the use time exceeds the predetermined time. The grinding time recording unit is configured to record the grinding time of each grinding process. At the end of each grinding process, the warning control unit controls the grinding time average calculation unit to calculate the average value of each grinding process according to the records of the grinding time recording unit, controls the overtime judgment unit to judge whether the sum of the use time and the average value exceeds the predetermined time, and controls the replacement warning unit to issue a warning when the overtime judgment unit judges that the sum exceeds the predetermined time.

2. The belt timer of claim 1, The replacement judgment unit comprises: an image temporary storage unit configured to temporarily store the images of the abrasive belt acquired by the image acquisition unit in chronological order; a dismounting judgment unit configured to judge whether the abrasive belt is dismounted or mounted; an identification judgment unit configured to judge whether the abrasive belt in different images is the same; and a judgment control unit configured to control the identification judgment unit to judge whether the abrasive belt in the images before and after the dismounting time point is the same when the dismounting judgment unit judges that the abrasive belt is dismounted and then mounted, and to judge that the abrasive belt is replaced when judging that the abrasive belt is not the same.

3. The abrasive belt time counting device according to claim 1, wherein: the image acquisition unit is arranged to face the abrasive surface of the abrasive belt, so as to acquire images of the abrasive surface. ​ ​ wherein, ​ 4. An automatic milling apparatus for milling grains, characterized by, ​ A grinding device, comprising a main roller, a main roller driving mechanism for driving the main roller to rotate, a sand belt driven by the main roller, a plurality of grinding chambers for containing grains and cooperating with the sand belt to achieve grinding, and a discharging mechanism for discharging the grains after grinding by the grinding chambers; and a sand belt timing device for timing the use time of the sand belt, wherein the sand belt timing device is the sand belt timing device according to any one of claims 1-3.

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