Chain transmission tension detection device and method of scraper conveyor

Abstract

The invention relates to the technical field of scraper conveyors, in particular to a chain transmission tension detection device and method for a scraper conveyor, and the device comprises a wear-resistant lining plate, at least one strain element and processing equipment; the abrasion-resistant lining plate is connected with the ledge of the transition groove, a mounting groove is formed in the area, opposite to the scraper, of the abrasion-resistant lining plate, at least one strain element is fixed in the mounting groove at equal intervals, and under the condition that the scraper chain passes through and extrudes the abrasion-resistant lining plate, the abrasion-resistant lining plate deforms and extrudes the strain elements; the processing equipment is connected with the strain element and used for determining the stress borne by the strain element according to the strain value and the elastic modulus of the wear-resistant lining plate and calculating the pressure borne by the wear-resistant lining plate according to the stress and the contact area of the wear-resistant lining plate and the scraper, and the pressure borne by the wear-resistant lining plate is the pressure applied to the transition groove by the scraper chain. And the tension of the wear-resistant lining plate is calculated according to the pressure borne by the wear-resistant lining plate. Therefore, the precision of the tension detection result of the scraper chain is improved.

Description

Technical Field

[0001] This invention relates to the field of scraper conveyor technology, and specifically to a chain drive tension detection device and method for scraper conveyors. Background Technology

[0002] Scraper conveyors are core equipment in fully mechanized mining faces. Their operation relies on a motor-driven hydraulic coupling, reducer, and sprocket. The sprocket meshes with the scraper chain, driving the chain and scrapers in a cyclical motion, ultimately conveying material from the tail to the head of the conveyor. As a critical traction mechanism, the scraper chain must transmit traction force, scrape material, withstand static and dynamic loads under sliding friction, and is also susceptible to mine water erosion. This leads to frequent failures such as chain jamming, chain skipping, and chain breakage, with a high failure rate. Research shows that the reliability of scraper conveyors decreases exponentially with operating time. Once a failure occurs, maintenance is not only difficult and time-consuming but also severely impacts coal mine production efficiency. Therefore, fault monitoring of the scraper chain is crucial.

[0003] In some scenarios, scraper chain tension is a key indicator for judging its operating status. Insufficient tension can cause the scraper chain to slack at the separation point of the drive sprocket, and in severe cases, it can accumulate, leading to chain breakage, chain jamming, or broken sprocket teeth. Excessive tension, on the other hand, can cause an abnormal increase in the overall energy consumption of the scraper conveyor. Traditional detection relies on suspended beam chain tension monitoring technology. The principle is to judge the tension by the amount of chain sag. The smaller the tension, the more obvious the chain sag, and the closer it is to the horizontal plane of the middle trough; the greater the tension, the tighter the chain, and the farther it is from the horizontal plane. Based on this, the tension value can be indirectly estimated by detecting the amount of sag on the loose side of the chain at the machine head. However, this method has obvious limitations: on the one hand, the sensor installation position is limited by the on-site environment, which can easily lead to deviations in monitoring results; on the other hand, the load distribution and load magnitude of the suspended beam will change the overall stress state of the chain, making the measured sag unable to accurately correspond to the actual chain tension, ultimately resulting in low accuracy of scraper chain tension detection. Summary of the Invention

[0004] To address the technical problem of low accuracy in tension detection results for scraper conveyors, the present invention aims to provide a chain drive tension detection device and method for scraper conveyors, the specific technical solution of which is as follows:

[0005] In a first aspect, embodiments of the present invention disclose a chain drive tension detection device for a scraper conveyor. The chain drive tension detection device for the scraper conveyor includes: an anti-wear liner, at least one strain element, and a processing device. The anti-wear liner is connected to the side of a transition groove. An installation groove is formed in the area where the anti-wear liner and the scraper are opposite. At least one strain element is fixed in the installation groove at equal intervals. When the scraper chain passes through and squeezes the anti-wear liner, the anti-wear liner deforms and squeezes the strain element, so that the strain element outputs a strain value. The processing device is connected to the strain element and is used to determine the stress on the strain element based on the strain value and the elastic modulus of the anti-wear liner, and to calculate the pressure on the anti-wear liner based on the stress and the contact area between the anti-wear liner and the scraper. The pressure on the anti-wear liner is the pressure applied to the transition groove by the scraper chain. The tension of the anti-wear liner is calculated based on the pressure on the anti-wear liner.

[0006] Secondly, embodiments of the present invention disclose a chain drive tension detection method for a scraper conveyor, comprising: acquiring the strain value output by at least one strain element; determining the stress on the strain element based on the elastic modulus and strain value of the wear-resistant liner; calculating the pressure on the wear-resistant liner based on the stress and the contact area between the wear-resistant liner and the scraper, wherein the pressure on the wear-resistant liner is the pressure applied to the transition groove by the scraper chain; and calculating the tension of the wear-resistant liner based on the pressure on the wear-resistant liner.

[0007] The technical solution disclosed in this invention integrates strain gauge elements into the wear-resistant liner along the upper edge of the transition groove. Signals are collected by utilizing the squeezing action of the scraper chain during operation, eliminating the need for sensors to be placed in the suspended space of the loose chain at the machine head. This allows for flexible adaptation to the complex environment of fully mechanized coal mining faces, solving the problems of limited sensor installation location and significant interference from the environment in traditional methods. This invention directly relies on the deformation feedback of the wear-resistant liner, combined with specific parameters such as the liner's elastic modulus and contact area. Through the calculation logic of stress, pressure, and tension, it avoids the influence of differences in the load distribution of the suspended beam on force detection, accurately capturing the actual tension value of the scraper chain and significantly improving the reliability and accuracy of the tension detection results. Therefore, precise tension monitoring can identify abnormal states of "too low tension" or "too high tension" in real time, providing timely warnings of risks such as chain breakage, chain jamming, and tooth breakage. It also avoids abnormally increased equipment power consumption due to excessive tension, ensuring the safe and stable operation of the scraper conveyor and helping to optimize overall machine operating efficiency and reduce ineffective energy consumption. The wear-resistant liner serves as both a protective layer and a force-sensing carrier. The strain element is easy to install and does not affect the normal operation of the scraper chain. The overall structure is highly compatible with the original components of the scraper conveyor, requiring no major modifications to the equipment. This facilitates on-site promotion and application, reducing equipment modification and maintenance costs. Attached Figure Description

[0008] Figure 1This is a schematic diagram of the structure of a chain drive tension detection device for a scraper conveyor provided in an embodiment of the present invention.

[0009] Figure 2 This is a structural schematic diagram of a scraper conveyor provided in an embodiment of the present invention.

[0010] Figure 3 This is a flowchart illustrating a chain drive tension detection method for a scraper conveyor provided in an embodiment of the present invention.

[0011] Reference numerals: wear-resistant liner 101, strain element 102, processing equipment 103, transition groove 10, mounting groove 104, cover plate 105, bolt 106, wiring groove 107, vertical ring 201, flat ring 202, scraper 203. Detailed Implementation

[0012] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a chain drive tension detection device and a scraper conveyor according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The specific embodiment of a chain drive tension detection device for a scraper conveyor provided by this invention is described below in conjunction with the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the structure of a chain drive tension detection device for a scraper conveyor provided in an embodiment of the present invention. Figure 2 This is a structural schematic diagram of a scraper conveyor provided in an embodiment of the present invention. Figure 3 This is a flowchart illustrating a chain drive tension detection method for a scraper conveyor provided in an embodiment of the present invention.

[0015] like Figure 1 As shown in the embodiment of the present invention, a chain drive tension detection device for a scraper conveyor includes: an anti-wear liner 101, at least one strain element 102, and a processing device 103. The anti-wear liner 101 is connected to the upper edge of the transition groove 10. An installation groove 104 is formed in the area of ​​the anti-wear liner 101 opposite to the scraper. At least one strain element 102 is fixed in the installation groove 104 at equal intervals. When the scraper chain passes through and squeezes the anti-wear liner 101, the anti-wear liner 101 deforms and squeezes at least one strain element 102, so that the strain element 102 outputs a strain value.

[0016] The processing device 103 is connected to the strain element 102 and is used to determine the stress on the strain element 102 based on the strain value and the elastic modulus of the wear-resistant liner 101. It also calculates the pressure on the wear-resistant liner 101 based on the stress and the contact area between the wear-resistant liner 101 and the scraper. The pressure on the wear-resistant liner 101 is the pressure applied to the transition groove by the scraper chain. The tension of the wear-resistant liner 101 is calculated based on the pressure on the wear-resistant liner 101.

[0017] Specifically, such as Figure 1 As shown, in this embodiment of the invention, the chain drive tension detection device of the scraper conveyor is located above the scraper chain, which includes a vertical ring 201, a flat ring 202, and a scraper 203. The scraper chain rotates cyclically under the drive of the sprocket. When the tail tensioning cylinder of the scraper conveyor tensions the chain, the components such as the vertical ring 201, flat ring 202, and scraper 203 come into close contact with and compress the wear-resistant liner 101. As the tension of the scraper chain increases, the scraper chain exerts increasing pressure on the upper edge of the transition groove. The tension of the scraper chain and the pressure exerted by the scraper chain on the upper edge of the transition groove are positively correlated. Therefore, this embodiment of the invention uses the measurement of the pressure applied by the scraper chain to the upper edge of the transition groove to determine the tension on the scraper chain.

[0018] Furthermore, the scraper chain exerts pressure on the upper edge of the transition groove. An anti-wear liner 101 is installed on the transition groove. The anti-wear liner 101 will produce different strains under different pressures. Therefore, in this embodiment of the invention, based on the principle of redundant strain, a strain element 102 is installed on the anti-wear liner 101. The strain element 102 can be a strain gauge, which is an element composed of a sensitive grid or similar component used to measure strain. It can detect minute deformations of the mechanical structure. Under mechanical deformation, its resistance will also change to a certain extent, thereby generating a corresponding strain. The strain of the strain gauge is correlated with the stress on the anti-wear liner 101. The strain magnitude of the strain gauge directly reflects the stress on the anti-wear liner 101. The pressure applied to the anti-wear liner 101 by the upper edge of the transition groove is correlated with the stress on the anti-wear liner 101. Therefore, the magnitude of the pressure exerted by the scraper chain on the upper edge of the transition groove can be determined based on the strain generated by the strain gauge.

[0019] Furthermore, such as Figure 1 As shown, in an optional embodiment of the present invention, an installation groove 104 can be formed in the top of the area opposite the scraper on the wear-resistant liner 101. The chain tension monitoring device also includes a cover plate 105, which covers the installation groove 104, thereby facilitating the installation of strain gauges and improving installation efficiency. Thus, the cover plate covering the installation groove provides physical protection for the strain gauges inside the groove, reducing the intrusion of dust, debris, and other impurities during scraper chain operation, lowering the risk of strain gauge damage, and ensuring monitoring stability.

[0020] It is worth noting that an installation groove can be opened in the middle of the area where the wear-resistant liner 101 is opposite to the scraper, so that there is no need to cover it again, thus making the structure of the detection device simpler and reducing costs.

[0021] Furthermore, the wear-resistant liner 101 is made of wear-resistant material, thereby preventing damage from the scraper chain and extending the service life of the equipment. In one optional embodiment of the invention, the wear-resistant liner 101 has a T-shaped structure. The vertical rod of the T-shaped structure is embedded in the transition groove, and the horizontal rod of the T-shaped structure is detachably connected to the side of the transition groove. An installation groove is formed in the vertical rod of the T-shaped structure. Figure 1 As shown, in this embodiment of the invention, the T-shaped vertical rod is embedded in the transition groove to ensure the stability of the detection device and improve the stability and reliability of the detection results. The T-shaped vertical rod embedded in the transition groove can stably bear the pressure of the scraper chain and prevent deviation. The vertical rod of the T-shaped structure is the area opposite to the scraper; therefore, opening an installation groove in the vertical rod of the T-shaped structure allows the force applied by the scraper chain to the installation groove to better match the pressure applied by the scraper chain to the transition groove. The overall design makes the force more balanced, further improving the stability and accuracy of tension monitoring.

[0022] Furthermore, as an optional embodiment of the present invention, the crossbar of the T-shaped structure is detachably connected to the side of the transition groove via bolts 106. Thus, this embodiment of the present invention uses bolts 106 to achieve a detachable connection between the crossbar of the T-shaped structure and the side of the transition groove, simplifying and facilitating assembly without the need for complex tooling, effectively improving equipment assembly efficiency. Moreover, the detachable design facilitates subsequent inspection, replacement, or maintenance of the crossbar and the side of the transition groove, reducing maintenance difficulty and costs, and minimizing equipment downtime.

[0023] Furthermore, the strain element 102 can be adhered to the bottom surface of the mounting groove using adhesive, thereby transferring the deformation generated by the wear-resistant plate to the strain element 102. For example... Figure 1 As shown, the strain element 102 is attached to the surface of the bottom of the tank.

[0024] Furthermore, as an optional embodiment of the present invention, the wear-resistant liner 101 is provided with a wiring groove 107, through which the connecting wire of at least one strain element 102 is connected to the processing device 103. In this way, the wiring groove provides a dedicated and orderly channel for the connecting wire of the strain element 102, avoiding messy tangling of the wires, preventing friction, compression, or snagging between the wires and equipment components during scraper chain operation, reducing the risk of wire damage and short circuits, and ensuring the continuity and stability of signal transmission. Moreover, the orderly arrangement of the wires along the wiring groove reduces the erosion of the connecting wires by dust, oil, and other impurities, extending the service life of the wires, while avoiding distortion of monitoring signals caused by external environmental interference, thus improving the accuracy of chain tension monitoring data.

[0025] Furthermore, as an optional embodiment of the present invention, there are multiple strain elements 102, each strain element 102 being fixed at equal intervals to the bottom of the mounting groove. Specifically, in this embodiment of the present invention, there may be three strain elements 102, arranged as follows: Figure 1 The structure shown is fixed to the bottom of the mounting groove to sense the deformation of the wear-resistant liner 101. The purpose of providing multiple strain gauges 102 is to achieve redundancy in tension detection, avoid the risk of tension detection failure due to the failure of some strain gauges, and improve the reliability of the tension detection results.

[0026] Furthermore, the processing device 103 is responsible for acquiring the signals from each strain element 102, converting the analog quantities into digital quantities, and performing tension calculations. The processing device 103 can be an electronic device such as a computer.

[0027] Specifically, in calculating the tension, according to the generalized Hooke's law, in the elastic stage of the wear-resistant liner 101, the stress and strain value of each strain gauge exhibit a linear relationship, specifically expressed as the following formula: ;

[0028] In the above formula, Indicates stress, Indicates the elastic modulus of the wear-resistant liner 101, This indicates the strain value output by strain element 102.

[0029] Furthermore, the stress and the pressure exerted on the wear-resistant liner 101 have the following relationship: ;

[0030] In the above formula, This indicates the pressure exerted on the wear-resistant liner 101. Indicates stress, This indicates the contact area between the wear-resistant liner 101 and the scraper.

[0031] Therefore, the pressure on the wear-resistant liner 101 can be calculated using the two equations above. It is worth noting that if only one strain element 102 is provided, then the strain element 102 can be... Directly substitute Calculated from .

[0032] When there are multiple strain elements 102, after eliminating invalid stress data, the average stress of the remaining strain elements 102 is determined; the pressure on the wear-resistant liner 101 is calculated based on the average value and the contact area between the wear-resistant liner 101 and the scraper.

[0033] Specifically, if there are three strain gauge elements 102 in this embodiment of the invention, and the original data of the three strain gauge elements 102 are a1, a2, and a3, firstly, compare and confirm whether the three sets of data a1, a2, and a3 are valid. If all are valid, then the strain gauge data a = (a1 + a2 + a3) / 3. If the data a3 is distorted, it is discarded, and the strain gauge data is, for example, a = (a1 + a2) / 2. If two of the data are distorted, they are discarded, and the strain gauge data is, for example, a = a1, a2, or a3. If the data of all three strain gauge elements are normal, the pressure on the wear-resistant liner 101 can be calculated using the following formula: F = E * ((a1 + a2 + a3) / 3) * A;

[0034] In the above formula, F represents the pressure exerted on the wear-resistant liner 101. This indicates the contact area between the wear-resistant liner 101 and the scraper. This represents the elastic modulus of the wear-resistant liner 101. a1, a2, and a3 represent the strain values ​​generated by the three strain elements 102, respectively.

[0035] Furthermore, such as Figure 2 As shown, Figure 2 This is a schematic diagram of a scraper conveyor according to an embodiment of the present invention. The scraper conveyor includes a chain drive tension detection device and a scraper conveyor body as described in the above embodiment. Wherein, as... Figure 2 As shown, there is a linear relationship between the tension on the scraper chain and the pressure exerted by the scraper chain on the transition groove. By decomposing the pressure exerted by the scraper chain on the transition groove, the horizontal component is the force with the same magnitude but opposite direction to the tension. Therefore, an equation can be established between the tension on the scraper chain and the pressure exerted by the scraper chain on the transition groove: F1 = k1F, k1 = COSA, where F1 represents the tension, F represents the pressure at the transition groove, and COSA is between 0 and 1. Thus, the tension on the scraper chain can be obtained.

[0036] It is worth noting that the embodiments of the present invention can also be installed at the head transition trough or tail transition trough of the scraper conveyor.

[0037] The technical solution provided by this invention integrates strain gauge elements into the wear-resistant liner along the upper edge of the transition groove. It utilizes the squeezing action of the scraper chain during operation to collect signals, eliminating the need for sensors to be placed in the suspended space of the loose chain at the machine head. This allows for flexible adaptation to the complex environment of fully mechanized coal mining faces, solving the problems of limited sensor installation location and significant interference from the environment in traditional methods. This invention directly relies on the deformation feedback of the wear-resistant liner, combined with specific parameters such as the liner's elastic modulus and contact area. Through the calculation logic of stress, pressure, and tension, it avoids the influence of differences in the load distribution of the suspended beam on the force detection, accurately capturing the actual tension value of the scraper chain and significantly improving the reliability and accuracy of the tension detection results. Therefore, precise tension monitoring can identify abnormal states of "too low tension" or "too high tension" in real time, providing timely warnings of risks such as chain breakage, chain jamming, and tooth breakage. It also avoids abnormally increased equipment power consumption due to excessive tension, ensuring the safe and stable operation of the scraper conveyor and helping to optimize overall machine operating efficiency and reduce ineffective energy consumption. The wear-resistant liner serves as both a protective layer and a force-sensing carrier. The strain element is easy to install and does not affect the normal operation of the scraper chain. The overall structure is highly compatible with the original components of the scraper conveyor, requiring no major modifications to the equipment. This facilitates on-site promotion and application, reducing equipment modification and maintenance costs.

[0038] Furthermore, such as Figure 3 As shown, Figure 3 This is a flowchart illustrating a method for detecting chain drive tension in a scraper conveyor according to an embodiment of the present invention. The method is based on the chain drive tension detection device for the scraper conveyor mentioned in the above embodiment. The method includes:

[0039] Step S301: Obtain the strain value output by at least one strain element.

[0040] Step S302: Determine the stress on the strain element based on the elastic modulus and strain value of the wear-resistant liner.

[0041] Specifically, as an optional embodiment of the present invention, determining the stress on the strain element based on the elastic modulus and strain value of the wear-resistant liner includes: determining the first product between the elastic modulus and strain value of the wear-resistant liner as the stress on the strain element.

[0042] Specifically, in calculating tension, according to the generalized Hooke's law, in the elastic stage of the wear-resistant liner, the stress and strain value of each strain gauge exhibit a linear relationship, specifically expressed as the following formula: ;

[0043] In the above formula, Indicates stress, Indicates the elastic modulus of the wear-resistant liner, This indicates the strain value output by the strain gauge.

[0044] Step S303: Calculate the pressure on the wear-resistant liner based on the stress and the contact area between the wear-resistant liner and the scraper. The pressure on the wear-resistant liner is the pressure applied to the transition groove by the scraper chain.

[0045] Specifically, the stress and the pressure exerted on the wear-resistant liner have the following relationship: ;

[0046] In the above formula, Indicates the pressure exerted on the wear-resistant liner. Indicates stress, This indicates the contact area between the wear-resistant liner and the scraper.

[0047] Therefore, the pressure on the wear-resistant liner can be solved using the two equations above. It is worth noting that if only one strain gauge is used, then the strain gauge... Directly substitute Calculated from .

[0048] Furthermore, as an optional embodiment of the present invention, calculating the pressure on the wear-resistant liner based on the stress and the contact area between the wear-resistant liner and the scraper includes: when there are multiple strain elements, after eliminating invalid stress data, determining the average value of the stress of the remaining strain elements; and calculating the pressure on the wear-resistant liner based on the average value and the contact area between the wear-resistant liner and the scraper.

[0049] Specifically, when there are multiple strain elements, after eliminating invalid stress data, the average stress of the remaining strain elements is determined; the average value and the contact area between the wear-resistant liner and the scraper are used to calculate the pressure on the wear-resistant liner.

[0050] Specifically, if there are three strain gauge elements in this embodiment of the invention, and the original data of the three strain gauge elements are a1, a2, and a3, firstly, compare and confirm whether the three sets of data a1, a2, and a3 are valid. If all are valid, then the strain gauge data a = (a1 + a2 + a3) / 3. If the data in item a3 is distorted, it is discarded, and the strain gauge data is, for example, a = (a1 + a2) / 2. If two of the data items are distorted, they are discarded, and the strain gauge data is, for example, a = a1, a2, or a3. If the data of all three strain gauge elements are normal, the pressure on the wear-resistant liner can be calculated using the following formula: F = E * ((a1 + a2 + a3) / 3) * A;

[0051] In the above formula, F represents the pressure exerted on the wear-resistant liner. This indicates the contact area between the wear-resistant liner and the scraper. This represents the elastic modulus of the wear-resistant liner. a1, a2, and a3 represent the strain values ​​generated by the three strain elements, respectively.

[0052] Step S304: Calculate the tension of the wear-resistant liner based on the pressure it is subjected to.

[0053] Furthermore, as an optional embodiment of the present invention, calculating the tension of the wear-resistant liner based on the pressure it receives includes: establishing a linear equation relationship between the pressure and the tension of the scraper chain based on the linear correlation between the pressure and the tension of the scraper chain; and solving for the tension of the scraper chain based on the linear equation relationship.

[0054] Specifically, as mentioned above Figure 2 As shown, there is a linear relationship between the tension on the scraper chain and the pressure applied by the scraper chain to the transition groove. By decomposing the pressure applied by the scraper chain to the transition groove, the horizontal component is the force with the same magnitude but opposite direction to the tension. Therefore, an equation can be established between the tension on the scraper chain and the pressure applied by the scraper chain to the transition groove: F1 = k1F, k1 = COSA, where F1 represents the tension, F represents the pressure at the transition groove, and COSA is between 0 and 1. Thus, the tension on the scraper chain can be obtained.

[0055] The technical solution disclosed in this invention integrates strain gauge elements into the wear-resistant liner along the upper edge of the transition groove. Signals are collected by utilizing the squeezing action of the scraper chain during operation, eliminating the need for sensors to be placed in the suspended space of the loose chain at the machine head. This allows for flexible adaptation to the complex environment of fully mechanized coal mining faces, solving the problems of limited sensor installation location and significant interference from the environment in traditional methods. This invention directly relies on the deformation feedback of the wear-resistant liner, combined with specific parameters such as the liner's elastic modulus and contact area. Through the calculation logic of stress, pressure, and tension, it avoids the influence of differences in the load distribution of the suspended beam on force detection, accurately capturing the actual tension value of the scraper chain and significantly improving the reliability and accuracy of the tension detection results. Therefore, precise tension monitoring can identify abnormal states of "too low tension" or "too high tension" in real time, providing timely warnings of risks such as chain breakage, chain jamming, and tooth breakage. It also avoids abnormally increased equipment power consumption due to excessive tension, ensuring the safe and stable operation of the scraper conveyor and helping to optimize overall machine operating efficiency and reduce ineffective energy consumption. The wear-resistant liner serves as both a protective layer and a force-sensing carrier. The strain element is easy to install and does not affect the normal operation of the scraper chain. The overall structure is highly compatible with the original components of the scraper conveyor, requiring no major modifications to the equipment. This facilitates on-site promotion and application, reducing equipment modification and maintenance costs.

[0056] It is worth noting that the chain drive tension detection method of the scraper conveyor in the embodiments of the present invention has the same or similar implementation and beneficial effects as the chain drive tension detection device of the scraper conveyor described above, and they can be referred to each other. The embodiments of the present invention will not be described again here.

[0057] It should be noted that the order of the above embodiments of the present invention is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. The processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0058] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

Claims

1. A chain drive tension detection device for a scraper conveyor, characterized in that, The chain drive tension detection device of the scraper conveyor includes: a wear-resistant liner, at least one strain element, and processing equipment; The wear-resistant liner is connected to the side of the transition trough of the scraper conveyor. An installation groove is opened in the area where the wear-resistant liner is opposite to the scraper of the scraper conveyor. At least one strain element is fixed in the installation groove at equal intervals. When the scraper chain passes by and squeezes the wear-resistant liner, the wear-resistant liner deforms and squeezes the strain element so that the strain element outputs a strain value. The processing equipment is connected to the strain element and is used to determine the stress on the strain element based on the strain value and the elastic modulus of the wear-resistant liner, and to calculate the pressure on the wear-resistant liner based on the stress and the contact area between the wear-resistant liner and the scraper. The pressure on the wear-resistant liner is the pressure applied to the transition groove by the scraper chain, and the tension of the wear-resistant liner is calculated based on the pressure on the wear-resistant liner.

2. The chain drive tension detection device for a scraper conveyor according to claim 1, characterized in that, The wear-resistant liner has a T-shaped structure, with the vertical rod of the T-shaped structure embedded in the transition groove, the horizontal rod of the T-shaped structure being detachably connected to the groove side of the transition groove, and an installation groove being formed in the vertical rod of the T-shaped structure.

3. The chain drive tension detection device for a scraper conveyor according to claim 2, characterized in that, The crossbar of the T-shaped structure is detachably connected to the groove side of the transition groove by bolts.

4. The chain drive tension detection device for a scraper conveyor according to claim 1, characterized in that, The wear-resistant liner is provided with a wiring groove, and the connecting wire of the at least one strain element is connected to the processing equipment after passing through the wiring groove.

5. The chain drive tension detection device for a scraper conveyor according to claim 1, characterized in that, The mounting groove is formed in the top of the area opposite to the scraper of the wear-resistant liner. The chain tension monitoring device also includes a cover plate, which covers the mounting groove.

6. The chain drive tension detection device for a scraper conveyor according to claim 1, characterized in that, The strain element is a plurality of elements, and each strain element is fixed at equal intervals to the bottom of the mounting groove.

7. A method for detecting the chain drive tension of a scraper conveyor, characterized in that, The chain drive tension detection device for the scraper conveyor according to any one of claims 1-6 includes: Obtain the strain value output by at least one strain gauge; The stress on the strain element is determined based on the elastic modulus of the wear-resistant liner and the strain value. The pressure on the wear-resistant liner is calculated based on the stress and the contact area between the wear-resistant liner and the scraper. The pressure on the wear-resistant liner is the pressure applied to the transition groove by the scraper chain. The tension of the wear-resistant liner is calculated based on the pressure applied to it.

8. The method for detecting chain drive tension in a scraper conveyor according to claim 7, characterized in that, The determination of the stress on the strain element based on the elastic modulus of the wear-resistant liner and the strain value includes: The first product between the elastic modulus of the wear-resistant liner and the strain value is determined as the stress on the strain element.

9. The method for detecting chain drive tension in a scraper conveyor according to claim 7, characterized in that, The calculation of the pressure on the wear-resistant liner based on the stress and the contact area between the wear-resistant liner and the scraper includes: When there are multiple strain elements, after removing invalid stress data, the average stress of the remaining strain elements is determined; The pressure on the wear-resistant liner is calculated by determining the average value and the contact area between the wear-resistant liner and the scraper.

10. The method for detecting chain drive tension in a scraper conveyor according to claim 7, characterized in that, The calculation of the tension of the wear-resistant liner based on the pressure it receives includes: Based on the linear relationship between the pressure and the tension of the scraper chain, a linear equation is established between the pressure and the tension of the scraper chain. The tension on the scraper chain is determined based on the linear equation relationship.

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