Material conveying equipment and its blockage detection equipment and sensors

Abstract

This invention provides a material conveying device and its blockage detection device and sensors. The sensors include: an elastic metal rod (1022), a metal tube (1024), and an elastic insulating sleeve (1023). In the blockage detection sensor array, if the lower sensor (102) continuously operates for a duration exceeding a first time threshold, and the upper sensor (102) operates at a frequency exceeding a first frequency threshold, a blockage alarm signal is triggered. If the number of sensors (102) exceeding a first quantity threshold continuously operates for a duration exceeding a second time threshold, a blockage fault signal is triggered. This invention effectively meets the needs of intelligent and automated blockage monitoring.

Description

Technical Field

[0001] The present invention relates to the field of material blockage detection, and in particular to material conveying equipment and material blockage detection equipment and sensors thereof. Background Art

[0002] At present, belt conveyors are widely used in stacker-reclaimers. In the cases of belt transfer, reversal, terminal storage, etc., bulk materials need to be transferred to other equipment through hoppers. At this time, there is a problem that materials often get blocked. This is mainly due to differences in material properties, viscosity, humidity and other factors that cause poor material flow, or foreign matter intrusion that causes material blockage. Blockage not only affects production, but also brings heavy workload to on-site operation staff to clean up overflow and silt.

[0003] Therefore, blockage detection equipment plays a vital role in ensuring the reliable operation of belt conveyor equipment.

[0004] At present, there are many means and finished products of material blockage detection equipment, which are mainly divided into non-contact type, limit, material switch type, rubber and rubber bag type, spectrum analysis type, etc. These detection devices are standardized products and it is difficult to match them with the on-site environmental requirements, operating conditions and installation methods.

[0005] Non-contact detection methods generally use radio frequency conductance, infrared, ultrasonic and other methods. Such detection devices should not be installed in a small space. They are easily affected by dust and volatile substances and cannot withstand the impact of falling large pieces of material. They usually become ineffective within a few days of installation.

[0006] Limit and material switch detection methods include torque type, telescopic type, spring type, rotation type, etc. All kinds of switches have been used on funnels, but they have been abandoned due to reasons such as inability to withstand falling material impact, malfunction, low detection sensitivity, and short service life.

[0007] The rubber and rubber bag detection method is to open a larger square or round opening on the side wall of the funnel in the direction of material falling, and use thick rubber or rubber bags to block it. When the material falls and blocks it, the rubber or rubber bag deforms outward, pushing the limit switch to operate and achieve the alarm effect. This method is stronger than the above various detection methods. However, this method is subject to false alarms due to the impact of large pieces of falling material.

[0008] Spectrum analysis detection is a new foreign technology. Each hopper has different spectrum values ​​when it is working, stopped, or blocked. Fuzzy technology is used to analyze the collected spectrum values ​​to determine whether it is blocked. This method is accurate and easy to install. You only need to glue the sensor to the detection part of the hopper. The disadvantage is that the cost is too high and the debugging is difficult. Different spectrum curves must be built in according to different conveyed materials. They must be pre-defined when working, and the requirements for on-site automatic control equipment are very high.

[0009] These detection methods are also commonly used in practical applications. Usually, the low-cost ones have poor reliability, and the high-reliability ones have too high a cost. It is difficult to achieve targeted detection with strong versatility, and the technical level of installation and maintenance required to achieve targeted detection is too high, so it is difficult to popularize. Moreover, these detection methods are basically switch-type detection. Through the detection method, a switch is activated when blockage occurs, thereby achieving the purpose of blockage detection. It can be seen that this is also the main reason why these methods cannot achieve high reliability. At present, equipment is developing in the direction of intelligence and automation, and simple switch-type detection methods are obviously unable to meet the requirements. Summary of the invention

[0010] In view of the defects in the prior art, the purpose of the present invention is to provide a material conveying equipment and a material blockage detection device and a sensor thereof.

[0011] A sensor 102 provided according to the present invention includes: an elastic metal rod 1022, a metal tube 1024, and an elastic insulating sheath 1023;

[0012] The top end of the elastic metal rod 1022 is exposed outside the elastic insulating sheath 1023, and the tail end of the elastic metal rod 1022 extends out of the second electrode 1028;

[0013] The top end of the metal tube 1024 is hidden in the elastic insulating sheath 1023, and the tail end of the metal tube 1024 extends out of the first electrode 1025;

[0014] The elastic metal rod 1022 is held in the hollow center of the metal tube 1024 by the elastic insulating sheath 1023, and when the top end is subjected to radial external force, the elastic insulating sheath 1023 is forced to undergo elastic deformation to establish electrical connection and contact with the metal tube 1024, which is recorded as an action.

[0015] Preferably, a metal sphere 1021 extends from the top of the elastic metal rod 1022 , wherein the diameter of the metal sphere 1021 is larger than the diameter of the elastic metal rod 1022 ; the tail end of the elastic metal rod 1022 is electrically isolated from the first electrode 1025 by the insulating material portion 1029 .

[0016] A material blocking detection sensor array provided by the present invention includes a plurality of sensors 102 as described above, and also includes a housing front panel 104;

[0017] A plurality of sensors 102 are arranged in rows and columns on a housing front panel 104 .

[0018] Preferably, the external thread 1027 of the first electrode 1025 of the sensor 102 is electrically threadedly connected to the metal housing front panel 104;

[0019] Sensors 102 in adjacent rows are arranged in an alternating manner.

[0020] A material blockage detection device provided according to the present invention includes the material blockage detection sensor array and a control circuit 907;

[0021] The control circuit 907 is electrically connected to the first electrode 1025 and the second electrode 1028 .

[0022] Preferably, the control circuit 907 includes:

[0023] Sensor status acquisition module: detects whether different sensors 102 are in motion;

[0024] Material blocking alarm module: in the material blocking detection sensor array, if the sensor 102 at the bottom continuously operates for a time period exceeding a first time threshold, and the frequency of the sensor 102 at the top operating exceeds a first frequency threshold, a material blocking alarm signal is triggered and output;

[0025] Material blocking fault processing module: in the material blocking detection sensor array, if the sensors 102 exceeding the first quantity threshold continuously operate for a time period exceeding the second time threshold, a material blocking fault signal is triggered and output;

[0026] The first quantity threshold is greater than or equal to 90%, and the second time threshold is greater than the first time threshold.

[0027] A material conveying device provided according to the present invention comprises a hopper 2 and the material blockage detection device;

[0028] The sensor 102 of the material blockage detection device is located inside the hopper 2 and is close to the upper edge of the hopper 2 relative to the lower edge of the hopper 2 .

[0029] Preferably, the axial direction of the sensor 102 is perpendicular to the inner wall of the hopper 2, and the sensor 102 is located on a side of the inner wall away from the conveyor belt.

[0030] Preferably, the sensor 102 is located at a point where less than or equal to 10% of the belt material curve C1 falls on the inner wall of the hopper 2 .

[0031] Preferably, when the output of the material blocking alarm signal is not triggered and the output of the material blocking fault signal is not triggered:

[0032] The control circuit 907 obtains the size state of the material flow according to the proportion of the sensors 102 that have been activated within the set time period; wherein, the larger the proportion, the larger the material flow is, and the smaller the proportion, the smaller the material flow is;

[0033] The control circuit 907 records the sensors 102 that have acted, marks an action surface area according to the distribution of the sensors 102 that have acted, and updates the action surface area with a set unit time; if a sensor 102 in the action surface area continues to act for more than a set number of unit time, it is considered that the sensor 102 is damaged; and when more than or equal to two sensors 102 in the action surface area continue to act for more than a set number of unit time, it is considered that the material is stuck on the sensor 102; if a sensor 102 does not act for more than a set number of unit time, but an adjacent sensor 102 acts multiple times within the same period, it is considered that the sensor 102 is damaged, loose or open.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. Based on the needs of users who are pursuing low costs, the structure and technology should not be complicated, otherwise the maintenance and installation requirements will be too high, which will increase the cost in disguise. Therefore, high-tech and costly means such as spectrum detection cannot be used. There are also switch-based detection methods. In order to improve reliability, the single switch detection method must be abandoned. Through multiple switch detection and comprehensive processing of single-chip microcomputers, reliability can be effectively improved.

[0036] 2. The present invention uses customized sensors as a detection method. By arranging multiple sensors, the occurrence of false operations can be effectively avoided, and the reliability of detection can be greatly improved. At the same time, according to the real-time status of the sensor, not only the blocking situation can be judged, but also the size of the material flow can be judged, and mutual verification can be performed for self-inspection, effectively meeting the needs of group intelligence and automation.

[0037] 3. The solid metal ball at the front end of the customized sensor of the present invention can effectively increase the contact area and improve the sensitivity of detection. The movement of the solid metal ball will drive the elastic metal rod connected to it and the outer high elastic elastic insulating sheath to undergo elastic deformation together, and then contact the inner wall of the metal tube. The metal tube and the metal base are a whole, so the elastic metal rod and the metal base as electrodes will be short-circuited, thereby outputting a switch signal as detection information and inputting it into the control circuit.

[0038] 4. The elastic structure of the present invention can effectively alleviate the impact caused by the impact and increase the service life. Rubber materials are much better than springs for elastic materials. Aging-resistant rubber has a long service life, while springs are easily corroded and lose their elasticity. In addition, thin springs are easily blocked by materials and lose their elasticity, while thick springs will occupy too much hopper space and affect the material flow. Therefore, the sensor of the present invention uses high-elastic rubber as the outer sheath combined with an elastic metal rod to achieve a long-life elastic structure. The highly elastic insulating sheath has a long service life and sufficient elasticity, which can protect the elastic metal rod from corrosion, so that even if the highly elastic insulating sheath ages, the elastic metal rod can still maintain its elasticity.

[0039] 5. The sensor of the present invention is small in size, so it will not affect the material flow itself, nor will it occupy too much hopper space. Through reasonable installation, the impact caused by the impact can be effectively avoided, and the arrangement of multiple sensors can avoid the problem of frequent malfunction of a single switch. The arrangement of multiple sensors must be processed to analyze whether a blockage has occurred, so it is necessary to add a single-chip microcomputer to the control circuit for processing. All sensor signals are connected to the single-chip microcomputer. Through the analysis and processing of the single-chip microcomputer, the output relay is driven to send alarm and fault signals to the superior equipment. In order to adapt to the development of intelligence and automation, the present invention will also set an RS485 communication interface, which can send the processing results and data of the present invention to upstream equipment, and the parameters of the present invention can be set and queried through this port. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0041] Figure 1 It is a schematic diagram of the overall application of the present invention.

[0042] Figure 2 This is a front sensor distribution diagram of the present invention.

[0043] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0044] Figure 4 It is a schematic diagram of the external structure of the sensor of the present invention.

[0045] Figure 5 for Figure 4 Schematic diagram of the AA cross-section structure.

[0046] Figure 6 for Figure 4 Schematic diagram of the BB cross-section structure.

[0047] The figure shows:

[0048] DETAILED DESCRIPTION

[0049] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0050] In order to achieve high-reliability material blockage detection and meet the transformation requirements of intelligent and automated equipment, the present invention provides a practical and reliable solution.

[0051] A material conveying device provided by the present invention includes a hopper 2 and the material blockage detection device; the sensor 102 of the material blockage detection device is located inside the hopper 2 and close to the upper edge of the hopper 2 relative to the lower edge of the hopper 2. The axial direction of the sensor 102 is perpendicular to the inner wall of the hopper 2, and the sensor 102 is located on the side of the inner wall away from the conveyor belt. The sensor 102 is located at the point where less than or equal to 10% of the belt material curve C1 falls on the inner wall of the hopper 2.

[0052] According to the present invention, a material blocking detection device includes the material blocking detection sensor array and a control circuit 907; the control circuit 907 is electrically connected to the first electrode 1025 and the second electrode 1028. The control circuit 907 includes: a sensor state acquisition module: for different sensors 102, respectively, to detect whether an action occurs; a material blocking alarm module: in the material blocking detection sensor array, if the sensor 102 located at the bottom continues to act for a time exceeding the first time threshold, and the frequency of the sensor 102 located at the top acts exceeds the first frequency threshold, then trigger the output of a material blocking alarm signal; a material blocking fault processing module: in the material blocking detection sensor array, if the sensor 102 exceeding the first number threshold continues to act for a time exceeding the second time threshold, then trigger the output of a material blocking fault signal; wherein the first number threshold is greater than or equal to 90%, and the second time threshold is greater than the first time threshold. Those skilled in the art know that in addition to implementing the various modules provided by the present invention in a purely computer-readable program code, it is entirely possible to implement the same program in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, each module provided by the present invention can be considered as a hardware component, and the modules included therein for implementing various programs can also be regarded as structures within the hardware component; the modules for implementing various functions can also be regarded as both software programs for implementing methods and structures within the hardware component. The corresponding control method includes the following steps: sensor state acquisition step: detecting whether an action occurs for different sensors 102 respectively; material blockage alarm step: in the material blockage detection sensor array, if the sensor 102 located at the lower part continues to act for a time period exceeding a first time threshold, and the frequency of the action of the sensor 102 located at the upper part exceeds a first frequency threshold, then a material blockage alarm signal is triggered to be output; material blockage fault handling step: in the material blockage detection sensor array, if the sensors 102 exceeding the first number threshold continue to act for a time period exceeding a second time threshold, then a material blockage fault signal is triggered to be output.

[0053] A material blocking detection sensor array provided by the present invention includes a plurality of sensors 102 and a housing front panel 104; the plurality of sensors 102 are arranged in rows and columns on the housing front panel 104. The external thread 1027 of the first electrode 1025 of the sensor 102 is electrically threadedly connected to the metal housing front panel 104; the sensors 102 in adjacent rows are staggered.

[0054] According to the present invention, a sensor 102 includes: an elastic metal rod 1022, a metal tube 1024, and an elastic insulating sheath 1023; the top of the elastic metal rod 1022 is exposed outside the elastic insulating sheath 1023, and the tail end of the elastic metal rod 1022 extends a second electrode 1028; the top of the metal tube 1024 is hidden in the elastic insulating sheath 1023, and the tail end of the metal tube 1024 extends a first electrode 1025; the elastic metal rod 1022 is held in the hollow center of the metal tube 1024 by the elastic insulating sheath 1023, and after the top end is subjected to radial external force, the elastic insulating sheath 1023 is forced to undergo elastic deformation to electrically connect and contact with the metal tube 1024, which is recorded as an action. When there is no radial external force, the elastic metal rod 1022 is disconnected from the electrical contact with the metal tube 1024 under the action of the elastic force of the elastic insulating sheath 1023, that is, the circuit is broken, and it is considered that the sensor has been restored. A metal sphere 1021 extends from the top of the elastic metal rod 1022 , wherein the diameter of the metal sphere 1021 is larger than the diameter of the elastic metal rod 1022 ; the tail end of the elastic metal rod 1022 is electrically isolated from the first electrode 1025 by the insulating material portion 1029 .

[0055] The present invention will be described in more detail below with reference to the accompanying drawings.

[0056] Figure 1 It is a schematic diagram of the overall application of the present invention. Figure 1 As shown, the belt 1 conveys the material to the hopper 2. Since the material has a certain speed, it will fall into the hopper 2 in the form of a parabola. Its running curve is basically as follows: Figure 1 As shown in the material flow curve C1 to the material flow curve C4, 90% of the material moves between the material flow curve C2 to the material flow curve C3, and a small amount of material runs between the material flow curve C1 and the material flow curve C4.

[0057] The material blockage detection device 100 provided by the present invention will be installed on the inner side of the hopper 2 near the upper edge position, so that the material of part of the material flow curve C1 can be detected. At this time, the material flow will touch some sensors 102 of the material blockage detection device 100 of the present invention, so the state of the material flow can be detected. When there is no material blockage, these sensors 102 will randomly move due to the instability of the material flow. Because the sensor 102 has elasticity, when the material does not touch the sensor 102, the sensor 102 will reset. Therefore, under the condition of normal material flow, these sensors 102 will have scattered action pulses, and the density of the pulses will decrease from bottom to top, that is, the lower the sensor 102, the denser the action, and the closer to the upper sensor 102, the density of the action gradually decreases. According to this state, the normal operation of the material flow can be judged. The elastic metal rod 1022 of the sensor 102 of the present invention is located at the center of the metal tube 1024, so it can effectively detect the touch action in any direction, so the sensitivity of the detection of scattered material flow will be greatly improved.

[0058] When a material blockage occurs, material accumulation will inevitably occur, and the material accumulation height will gradually increase as the material blockage increases. As the edge of the material accumulation in the hopper 2 approaches the lower edge of the material blockage detection device 100 of the present invention, the sensors 102 in the lower half of the array composed of multiple sensors 102 of the present invention will obviously move frequently, and some sensors 102 will gradually be unable to rebound due to the accumulation of materials, and will be in a long-term short-circuited state. According to this change process, the control circuit will trigger the alarm relay to issue a material blockage warning message, and at the same time, send a warning message and detailed action distribution information of the sensor 102 through the RS485 interface. As time goes by, the material accumulation will cover the entire sensor 102 of the present invention. At this time, all sensors 102 of the present invention will be in action and will not rebound. At this time, the control circuit will trigger the material blockage fault relay, send a signal of a material blockage fault, and at the same time, send a material blockage fault message and detailed action distribution information of the sensor 102 through the RS485 interface.

[0059] Figure 21 is the front sensor distribution diagram of the present invention. The present invention adopts the form of multi-sensor joint information collection. All sensors 102 are arranged on the front panel 104 of the housing of the material blocking detection device 100. In order to ensure the sensitivity of the detection, but not to affect the material flow, the sensors 102 will be evenly arranged on the front panel 104 of the housing in a staggered form in three rows. The metal base 1026 of the sensor 102 is processed with threads, which are fastened to the front panel 104 of the housing. The metal base 1026 is processed into a regular hexagonal form and can be quickly disassembled and assembled by a wrench, so replacement and maintenance will be very convenient. More specifically, the metal sphere 1021 of the sensor 102 is a solid metal ball as a metal probe, which is welded to the top of the elastic metal rod 1022. The metal tube 1024 is located in the center of the metal base 1026 and is an integral part of the metal base 1026. The elastic metal rod 1022 passes through the center of the metal tube 1024, passes through the metal base 1026, and is fixed to the center of the metal base 1026 through the insulating material part 1029. The elastic metal rod 1022 and the metal base 1026 respectively constitute two electrodes of the sensor. The elastic insulating sheath 1023 tightly wraps the elastic metal rod 1022 and the outer side of the metal tube 1024, and a certain gap is left inside the elastic insulating sheath 1023 at the front end of the metal tube 1024, so that the elastic metal rod 1022 can move in the metal tube 1024.

[0060] Figure 3 Schematic diagram of the internal structure of the present invention. The control circuit is fixed inside the shell 901 through four mounting holes. An electrode is set at the bottom of the mounting hole of each sensor 102. When the sensor 102 is tightened, it will be reliably connected to the elastic metal rod 1022 in the middle of the sensor. Since the base of the sensor 102 also serves as an electrode, it will be tightly connected to the shell 901 after tightening. Since the shell 901 is also made of metal, the bases of all sensors 102 will be connected to the metal shell 901 to form a common electrode. The shell 901 is connected to the common pole of the circuit board through the mounting hole. Therefore, each sensor 102 only needs to connect one sensor connecting wire 908 to the sensor interface 906 of the control circuit 907, which greatly simplifies the circuit. More specifically, the outer side of the metal base 1026 of the sensor 102 is processed with threads to form external threads, and multiple screw holes are processed on the front panel 104 of the shell. Multiple sensors 102 are staggered and installed on the outer side of the front of the shell 901. The control circuit 907 is installed inside the housing 901, and the detection electrodes of all sensors 102 are connected to the sensor circuit in the control circuit 907. The control circuit 907 collects sensor signals, and after processing, outputs detection signals through the relay circuit and the communication circuit.

[0061] The power interface 902 is an external power supply interface for providing power to the material blockage detection device 100 of the present invention.

[0062] The material blocking alarm relay interface 903 is used to detect that some sensors 102 are frequently actuated, and some sensors 102 are actuated for a long time without recovery, at which time the material blocking alarm relay interface 903 is triggered to output a material blocking alarm signal. At the same time, the material blocking alarm information and the action analysis data of the sensor 102 are sent to the upstream equipment through the RS485 communication 904 interface.

[0063] The material blocking fault relay interface 905 is used to detect that all or most of the sensors are activated and do not recover for a long time. At this time, the material blocking fault relay interface 905 is triggered to send a material blocking fault signal. At the same time, the material blocking fault information and the action analysis data of the sensor 102 are sent to the upstream device through the RS485 communication 904 interface.

[0064] The present invention can judge the size of the material flow. Specifically, when the material falls into the hopper, it is distributed in a parabolic curve, such as material flow curve C1 is a material curve with a faster speed, and material flow curve C4 is a material curve with a lower speed. If the material flow is low, the material flow curve approaches the material flow curve C4, and vice versa, when the material flow is large, the material flow curve approaches the material flow curve C1. Most of the normal material flow curve should be located between the material flow curve C2 and the material flow curve C3, and a small part is located between the material flow curve C1 or the material flow curve C4, and the installation position of the sensor 102 of the present invention should also ensure that this feature is realized.

[0065] Based on this characteristic, when the material flow is normal, a small number of sensors 102 will inevitably be activated. The small number refers to the proportion of the number that should be adjusted to less than 30%. At this time, the control circuit of the present invention will always monitor the action of each sensor. The proportion of the number of sensors that are activated within a unit time (usually 1 minute, which can be modified by parameters) also reflects the size of the material flow. The more the proportion of sensors 102 that are activated, the larger the material flow, and vice versa, the smaller the material flow.

[0066] The sensors of the present invention can check each other for self-checking. Specifically, based on the principle of the above-mentioned material flow detection, the present invention must have multiple sensors 102 in action when working. The present invention will record the sensors 102 that are in action during work, and mark an action surface area according to its distribution. As the material flow changes, this action surface area also changes, and is basically updated in minutes. The control circuit 907 will think that the sensors in the action surface area should be in action continuously, but no sensor 102 will be in action for a long time (more than 10 minutes). If a sensor is in action for a long time, it is considered that the sensor 102 may be damaged. When multiple (usually more than 3) sensors 102 appear in the surface area and act for a long time, it is considered that the material is blocked on the sensor 102. However, this judgment must be made on the premise that no blocking alarm or blocking failure has been determined, otherwise the blocking alarm or blocking failure will cover the state detection.

[0067] Another situation is that if one sensor 102 does not operate for a long time, while the adjacent sensor 102 operates frequently, it is considered that the sensor 102 is damaged, loose, or open.

[0068] Figure 4 The figure is a schematic diagram of the external structure of the sensor 102 of the present invention. The top of the sensor 102 is a metal sphere 1021, which can increase the contact area of ​​the sensor 102 and improve the sensitivity of the sensor 102. The metal sphere 1021 is connected to the elastic metal rod 1022, and the elastic metal rod 1022 is made of high elastic steel. The elastic insulating sheath 1023 tightly wraps the elastic metal rod 1021 and the metal tube 1024 on the metal base 1026. The elastic insulating sheath 1023 made of high elastic rubber can not only play a protective role but also improve the elasticity of the elastic metal rod 1022. The elastic insulating sheath 1023 is made of rubber material. The metal base 1026 is processed into a regular hexagonal structure and is processed with an external thread 1027, so that the sensor 102 can be easily and quickly disassembled and assembled by a wrench. The metal base 1026 serves as the first electrode 1025 of the sensor 102, and the elastic metal rod 1022 passes through the metal base 1026 as the second electrode 1028 of the sensor 102. Since the entire sensor 102 is very small, it will not affect the material. At the same time, due to the existence of the elastic insulating sheath 1023, even if the elastic metal rod 1022 is plastically deformed due to a strong impact, the elastic insulating sheath 1023 will separate the contact point between the elastic metal rod 1022 and the metal tube 1024 after the force disappears, thereby ensuring that the effectiveness of the sensor 102 is more lasting.

[0069] Figure 5 for Figure 4AA cross-sectional structural diagram. The metal sphere 1021 is connected to the elastic metal rod 1022 as a whole, and the elastic metal rod 1022 passes through the center of the metal tube 1024 and directly reaches the tail of the metal base 1026. The elastic insulating sheath 1023 tightly wraps the elastic metal rod 1022 and the metal tube 1024, and at the same time, a certain gap is reserved at the top position of the metal tube 1024, so that the elastic metal rod 1022 can move freely. The metal tube 1024 and the metal base 1026 are an integrated structure, and the elastic metal rod 1022 and the metal base 1026 are separated by the insulating material part 1029 inside the metal base 1026, so that the metal base 1026 and the elastic metal rod 1022 become a pair of electrodes of the sensor. The metal base 1026 is processed with an external thread 1027, which can facilitate the disassembly and assembly of the sensor 102.

[0070] Figure 6 for Figure 4 BB cross-sectional structural diagram. The elastic metal rod 1022 is located at the center of the entire sensor 102, and then the metal tube 1024, the elastic insulating sheath 1023 and the metal base 1026 are arranged outward from the elastic metal rod 1022. The elastic metal rod 1022 is at the center and will undergo elastic deformation when subjected to force in any direction, so that it will contact the top of the metal tube 1024, thereby triggering the sensor 102 to act and detecting a trigger signal.

[0071] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0072] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A material blocking detection sensor array, characterized in that: It includes a plurality of sensors (102) and a housing front panel (104); A plurality of sensors (102) are arranged in rows and columns on a housing front panel (104); The sensor (102) comprises: an elastic metal rod (1022), a metal tube (1024), and an elastic insulating sheath (1023); The top end of the elastic metal rod (1022) is exposed outside the elastic insulating sheath (1023), and the tail end of the elastic metal rod (1022) extends out of the second electrode (1028); The top end of the metal tube (1024) is hidden in the elastic insulating sheath (1023), and the tail end of the metal tube (1024) extends out of the first electrode (1025); The elastic metal rod (1022) is held in the hollow center of the metal tube (1024) by the elastic insulating sheath (1023), and when the top end is subjected to radial external force, the elastic insulating sheath (1023) is forced to undergo elastic deformation to establish electrical connection and contact with the metal tube (1024), which is recorded as an action.

2. The material blockage detection sensor array according to claim 1, characterized in that: The external thread (1027) of the first electrode (1025) of the sensor (102) is electrically threadedly connected to the metal housing front panel (104); Sensors (102) in adjacent rows are arranged in an alternating manner.

3. The material blockage detection sensor array according to claim 1, characterized in that: A metal sphere (1021) extends from the top end of the elastic metal rod (1022), wherein the diameter of the metal sphere (1021) is greater than the diameter of the elastic metal rod (1022); and the tail end of the elastic metal rod (1022) is electrically isolated from the first electrode (1025) by an insulating material portion (1029).

4. A material blocking detection device, characterized in that: The material blockage detection sensor array according to claim 1, 2 or 3 further comprises a control circuit (907); The control circuit (907) is electrically connected to the first electrode (1025) and the second electrode (1028).

5. The material blocking detection device according to claim 4, characterized in that: The control circuit (907) comprises: Sensor status acquisition module: detects whether different sensors (102) are in motion; A material blocking alarm module: in the material blocking detection sensor array, if the time for which the sensor (102) located at the bottom continuously operates exceeds a first time threshold, and the frequency at which the sensor (102) located at the top operates exceeds a first frequency threshold, then a material blocking alarm signal is triggered and output; A material blocking fault processing module: in the material blocking detection sensor array, if the number of sensors (102) exceeding a first quantity threshold value continues to operate for a time period exceeding a second time threshold value, then a material blocking fault signal is triggered and output; The first quantity threshold is greater than or equal to 90%, and the second time threshold is greater than the first time threshold.

6. A material conveying device, characterized in that: It comprises a hopper (2), and also comprises a material blockage detection device as claimed in claim 4 or 5; The sensor (102) of the material blockage detection device is located inside the hopper (2) and is close to the upper edge of the hopper (2) relative to the lower edge of the hopper (2).

7. The material conveying equipment according to claim 6, characterized in that: The axial direction of the sensor (102) is perpendicular to the inner wall of the hopper (2), and the sensor (102) is located on a side of the inner wall away from the conveyor belt.

8. The material conveying equipment according to claim 7, characterized in that: The sensor (102) is located at a point where less than or equal to 10% of the belt material curve C1 falls on the inner wall of the hopper (2).

9. The material conveying equipment according to claim 8, characterized in that: When no blocking alarm signal is triggered and no blocking fault signal is triggered: The control circuit (907) obtains the size state of the material flow according to the proportion of the sensors (102) that have been activated within a set time period; wherein the larger the proportion, the larger the material flow, and the smaller the proportion, the smaller the material flow; The control circuit (907) records the sensors (102) that have taken action, marks an action surface area according to the distribution of the sensors (102) that have taken action, and updates the action surface area at a set unit time; if a sensor (102) in the action surface area continues to take action for more than a set number of unit times, it is considered that the sensor (102) is damaged; and if two or more sensors (102) in the action surface area continue to take action for more than a set number of unit times, it is considered that material is stuck on the sensor (102); if a sensor (102) does not take action for more than a set number of unit times, but an adjacent sensor (102) takes action multiple times during the same period, it is considered that the sensor (102) is damaged, loose, or open.

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