Device for automatically judging limited feeding

Abstract

The utility model discloses a device for automatically judging limited feeding, which is characterized in that a control system is connected with a high material level sensor, a low material level sensor and a feeding mechanism, and is used for controlling the operation of the feeding mechanism according to signals of the sensors; the control system comprises a timer which is started after the signal of the high material level sensor disappears and is used for setting a preset time and triggering a low material level detection state after the preset time; and the switching value signal feedback module is used for receiving and processing a feedback signal of the low material level sensor after feeding operation. According to the utility model, when the diameters of cables are different and the speeds of extruded materials are different, the low material level is automatically detected and the materials are fed within a period of time after a high material level signal disappears, so that long-time waiting and frequent feeding are avoided, the feeding efficiency is obviously improved, unnecessary feeding and pipe cleaning are reduced, and the production cost is reduced. Therefore, consumption of compressed air is reduced, and energy is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of material processing, in particular to a device for automatically judging limited material supply. Background Art

[0002] In the supply of plastic pellets, the traditional method usually relies on setting sensors at the high and low material level positions of the tank to determine the inventory of the material. However, this method has some inherent problems and limitations.

[0003] First, if the only way to determine whether to feed is by low-level sensors, the system will trigger the feeding process every time the sensor detects insufficient material. In an environment with multiple storage tanks, such as a plastic pellet storage environment for an extruder, the consumption rate of each tank may vary due to the production of different cables. This may cause some tanks to need to be refilled frequently, while other tanks are consumed more slowly. In this case, if each tank can only be fed a small amount of material one by one when the low-level sensor triggers the feeding, the entire feeding process will be very time-consuming and inefficient.

[0004] Secondly, if you rely on the high material level sensor to determine whether feeding is needed, when the high material level signal disappears, it is considered that the material is insufficient and feeding begins. However, this method also has problems. Since the pipe needs to be cleaned during the feeding process and compressed air is blown to the use point to ensure that the valve does not turn with material when switching, this is not only time-consuming (for example, each pipe cleaning may take 30 seconds), but also because only a small amount of material can be fed each time (for example, only 10% at most), the feeding operation needs to be performed frequently, which leads to a large waste of compressed air energy.

[0005] Therefore, in a relatively complex environment where multiple material tanks 1 feed extruders with different consumption speeds, how to achieve an efficient and energy-saving automatic feeding process has become a technical problem to be solved by the present utility model. Utility Model Content

[0006] The technical problem solved by the utility model is to provide a device for automatically judging limited feeding in view of the defects existing in the above-mentioned prior art, so as to solve the problems of time-consuming and energy-wasting feeding process in a relatively complex environment raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0008] A device for automatically judging limited supply, comprising:

[0009] At least two material tanks for storing plastic particles, each of which is provided with a high material level sensor and a low material level sensor;

[0010] A feeding mechanism, used to add plastic pellets to the tank;

[0011] A control system connected to the high material level sensor, the low material level sensor and the feeding mechanism, and used to control the operation of the feeding mechanism according to the signals from the sensors;

[0012] The control system further comprises:

[0013] A timer is activated when the high level sensor signal disappears and is used to set a predetermined time after which the low level detection state is triggered;

[0014] The switch signal feedback module is used to receive and process the feedback signal of the low material level sensor after the feeding operation.

[0015] As a further solution of the present invention, the predetermined time is adjustable within a range of 1 to 5 minutes.

[0016] As a further solution of the present invention, the predetermined time is 2 minutes.

[0017] As a further solution of the utility model, the feeding mechanism performs a feeding operation after receiving a signal triggered by a low material level detection state, and confirms the feeding state through a switch signal feedback module after the feeding is completed.

[0018] As a further solution of the present invention, the control system also includes a priority management module for determining the priority of feeding materials among multiple material tanks.

[0019] Compared with the prior art, the beneficial effect of the utility model is that when different cable diameters lead to different extrusion material speeds, the low material level is automatically detected and the material is fed within a period of time after the high material level signal disappears, thereby avoiding long waiting and frequent feeding, significantly improving the feeding efficiency, reducing unnecessary feeding and pipe cleaning, and thereby reducing the consumption of compressed air and saving energy.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] The reference numerals and names in the figures are as follows:

[0024] Material tank 1, high material level sensor 2, low material level sensor 3, feeding mechanism 4, control system 5, pipe cleaning device 6, compressed air interface 7, material silo 8 and feeding pipe 9. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. 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.

[0026] See also Figure 1 In an embodiment of the utility model, a device for automatically judging limited feed includes:

[0027] At least two material tanks 1 for storing plastic particles, the material tanks 1 are provided with a high material level sensor 2 and a low material level sensor 3; a feeding mechanism 4 for replenishing plastic particles into the material tanks 1;

[0028] The control system 5 is connected to the high material level sensor 2, the low material level sensor 3 and the feeding mechanism 4, and is used to control the operation of the feeding mechanism 4 according to the signals of the sensors; the control system 5 further includes: a timer, which is started when the signal of the high material level sensor 2 disappears, and is used to set a predetermined time, and trigger the low material level detection state after the predetermined time; a switch signal feedback module, which is used to receive and process the feedback signal of the low material level sensor 3 after the feeding operation. The predetermined time is adjustable, ranging from 1 to 5 minutes, preferably 2 minutes, so as to realize timely replenishment of materials in the limited storage space of the material tank 1 and avoid interruption of feeding.

[0029] The feeding mechanism 4 performs feeding operation after receiving the signal triggered by the low material level detection state, and confirms the feeding state through the switch signal feedback module after the feeding is completed. The control system 5 also includes a priority management module for determining the priority order of feeding in multiple material tanks 1.

[0030] The feeding mechanism 4 includes a pipe cleaning device 6, a compressed air interface 7 and a feeding pipe 9 connected to multiple material tanks 1; the pipe cleaning device 6 can be an air compressor, and the compressed air interface 7 of the air compressor is connected to a position on the feeding pipe 9 away from the material tank 1, which is used to clear the residual material in the pipeline through the high-speed input of compressed air after feeding, so as to ensure that, for example, the valve used for controlling the connection between the feeding pipe 9 and the material tank 1 will not entrain the material when switching. When the extrusion material speed is different due to different cable diameters, the technical solution of the utility model can be adopted, that is, the low material level is automatically detected and the material is fed within a period of time after the high material level signal disappears, avoiding long waiting and frequent feeding, significantly improving the feeding efficiency, reducing unnecessary feeding and pipe cleaning, and thus reducing the consumption of compressed air and saving energy.

[0031] Embodiment 1:

[0032] This embodiment shows an apparatus for automatically determining limited supply, and its application in the supply of plastic particles. The apparatus mainly includes at least two material tanks 1, a feeding mechanism 4 and a control system 5. Each material tank 1 is equipped with a high material level sensor 2 and a low material level sensor 3, which are used to monitor the amount of plastic particles in the material tank 1. The feeding mechanism 4 is responsible for replenishing plastic particles in the material tank 1, and the control system 5 controls the operation of the feeding mechanism 4 according to the signal of the sensor.

[0033] Specifically, when the signal of the high material level sensor 2 disappears, the timer in the control system 5 will start and set a predetermined time (for example, set to 2 minutes). After this predetermined time, the control system 5 will trigger the low material level detection state. If the low material level sensor 3 sends a signal, indicating that the plastic particles in the material tank 1 have fallen below the preset low material level, the control system 5 will instruct the feeding mechanism 4 to start feeding.

[0034] After the feeding operation is completed, the feeding mechanism 4 will confirm the feeding status through the switch signal feedback module in the control system 5. This feedback mechanism ensures the accuracy and traceability of the feeding process.

[0035] In addition, the device is also equipped with a pipe cleaning device 6 and a compressed air interface 7, which are used to remove residual materials in the feeding pipeline after feeding, so as to ensure that the valve will not entrain materials when switching, thereby avoiding unnecessary waste and potential blockage problems.

[0036] In an environment with multiple material tanks 1, such as a plastic pellet storage environment for an extruder, the control system 5 also includes a priority management module for determining the priority of feeding among the multiple material tanks 1. This function is crucial for managing the feeding of extruders with different consumption speeds, because it can ensure the efficiency and timeliness of the feeding process.

[0037] By adopting the device of this embodiment, an efficient and energy-saving automatic feeding process can be achieved. Specifically, the predetermined time set by the timer avoids frequent triggering of the feeding process, thereby reducing the number of feeding times and the use of compressed air. At the same time, the priority management module ensures the optimization of the feeding process, so that the plastic particles in the multiple material tanks 1 can be replenished on demand and in an orderly manner.

[0038] In general, the device of this embodiment realizes efficient and energy-saving management of plastic pellet supply by combining technical means such as sensor signals, timers and priority management modules. This technical solution not only improves production efficiency, but also reduces energy consumption and operating costs, and has important practical value for the plastic pellet supply industry.

[0039] Embodiment 2:

[0040] This embodiment will describe in detail the key components in the device for automatically determining limited supply, and explain in depth the priority management module in the control system 5.

[0041] First, regarding the high level sensor 2 and the low level sensor 3 on the material tank 1, these sensors can be non-contact sensors, such as capacitive, ultrasonic or photoelectric sensors. These sensors can detect the material level of the plastic particles. When the plastic particles reach or exceed the set high level, the high level sensor 2 will send a signal; similarly, when the plastic particles drop to or fall below the set low level, the low level sensor 3 will also send a signal. These sensor signals are important bases for the control system 5 to make feeding decisions.

[0042] The control system 5 is the core of the device, which usually includes a microprocessor or a programmable logic controller (PLC) for receiving and processing signals from the sensor and controlling the operation of the feeding mechanism 4 according to a preset logic. The control system 5 is also equipped with a timer for setting a predetermined time after the signal of the high material level sensor 2 disappears, so as to trigger the low material level detection state at an appropriate time. In addition, the control system 5 also has a switch signal feedback module for confirming the completion status of the feeding operation, which are all extended implementation methods known to ordinary technicians in this field.

[0043] The feeding mechanism 4 includes a silo 8 and a feeding pipe 9 connected to the silo 8 and respectively connected to multiple tanks 1. The priority management module in the control system 5 is that in an environment with multiple tanks 1, the plastic granule consumption rate of different tanks 1 may be different due to the production requirements of the extruder. In order to optimize the feeding efficiency, the priority management module in the control system 5 will dynamically determine the feeding priority according to the demand of each tank 1. For example, suppose there are three tanks A, B and C, corresponding to three extruders respectively. If the production speed of extruder A is the fastest, so the plastic granule consumption rate of tank A is also the fastest, then the priority management module will set tank A to the highest priority. When the control system 5 receives a feeding request, it will first check the signal of the low material level sensor 3 of tank A. If tank A needs to be supplemented with plastic granules, the feeding mechanism 4 will give priority to feeding tank A. Only when the plastic granules in tank A reach a high material level, the control system 5 will consider feeding other tanks 1 according to the priority order.

[0044] To achieve this function, the priority management module can adjust the priority of tank 1. For example, it can calculate a priority score based on factors such as the consumption rate, remaining inventory, and production demand of each tank 1, and sort the feeding order according to the score. In addition, the priority management module can also support manual adjustment functions so that operators can make flexible adjustments based on actual conditions.

[0045] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A device for automatically determining limited supply, characterized in that: include: At least two material tanks for storing plastic particles, each of which is provided with a high material level sensor and a low material level sensor; A feeding mechanism, used to add plastic pellets to the tank; A control system connected to the high material level sensor, the low material level sensor and the feeding mechanism, and used to control the operation of the feeding mechanism according to the signals from the sensors; The control system further comprises: A timer is activated when the high level sensor signal disappears and is used to set a predetermined time after which the low level detection state is triggered; The switch signal feedback module is used to receive and process the feedback signal of the low material level sensor after the feeding operation; The predetermined time is adjustable, ranging from 1 to 5 minutes; The feeding mechanism performs a feeding operation after receiving a signal triggered by a low material level detection state, and confirms the feeding state through a switch signal feedback module after the feeding is completed.

2. A device for automatically judging limited feed according to claim 1, characterized in that: The predetermined time is 2 minutes.

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