Container overload and unbalanced load detection device F-TR lock hooking prevention calibration method

Abstract

The invention relates to an anti-F-TR lock hooking calibration method for a container overload and unbalanced load detection device, which can conveniently and quickly realize calibration of an anti-F-TR lock hooking detection module and improve the use safety of the overload and unbalanced load detection device. The method comprises the following steps that a balance weight is placed on a supporting column at the bottom of a simulation container so that a certain distance can be formed between the balance weight and a bottom plate, and the weight of the simulation container is matched with the weight of a container to be tested; a plurality of supporting through holes penetrating through the bottom plate are formed in the bottom of the simulation container, supporting columns penetrate through the supporting through holes, and the length of the supporting columns is larger than the thickness of the bottom plate; a lifting appliance of the container overload and unbalanced load detection device is connected with a simulation container, the simulation container is lifted, and at the moment when a bottom plate of the simulation container is in contact with a balance weight, whether an alarm is given by an anti-hooking detection module or not is checked.

Description

Technical Field

[0001] The invention relates to a method for calibrating an F-TR lock hooking prevention device for an overload and unbalanced load detection device of a container. Background Art

[0002] The gross weight and center of gravity coordinates of containers measured by the container overload and unbalanced load detection device are mainly used to prevent overloading or unbalanced load problems in transportation vehicles such as road vehicles, railway trains and sea freighters carrying containers, thereby ensuring transportation safety.

[0003] The existing suspended container overload and unbalanced load detection device is mainly installed on the front crane hanger or the gantry crane hanger, and can detect the weight, unbalanced weight and unbalanced load of the container when lifting the container. Among them, when lifting the container, in order to prevent the container from being lifted together with the container flatbed due to the hooking of the F-TR lock, which may cause the container flatbed to overturn, the existing container overload and unbalanced load detection device is provided with an anti-hooking detection module. There is no method and device for calibrating the anti-hooking detection module in the existing technology, resulting in inconsistent calibration standards for anti-hooking of the suspended container overload and unbalanced load detection device, which is prone to safety accidents. Summary of the Invention

[0004] The purpose of the present invention is to provide a container overload detection device anti-F-TR lock hook calibration method, which can conveniently and quickly realize the calibration of the F-TR lock anti-hooking detection module and improve the safety of the overload detection device during use.

[0005] The technical solutions of the present invention are as follows:

[0006] The method for calibrating the anti-F-TR lock hooking of the container overload detection device includes the following steps:

[0007] S10, placing a counterweight on the support column at the bottom of the simulated container so that there is a certain distance between the counterweight and the bottom plate, and the weight of the simulated container matches the weight of the container to be tested;

[0008] A plurality of supporting holes penetrating the bottom plate are provided at the bottom of the simulated container, and supporting columns are installed in the supporting holes, and the length of the supporting columns is greater than the thickness of the bottom plate;

[0009] S20, connecting the lifting device of the container overload and unbalanced load detection device to the simulated container and lifting the simulated container;

[0010] S30. When the bottom plate of the simulated container contacts the counterweight, check whether the anti-hooking detection module issues an alarm.

[0011] Based on the above solution, further improvements are made as follows: the simulated container includes a bottom plate, columns and multiple weights arranged on the bottom plate, and the total weight of the bottom plate, columns and weights simulates the total weight of a real container.

[0012] Based on the above solution, we further improved it as follows: the distance between the counterweight and the base plate is 0-120mm, because the actual container and the F-TR lock are mostly connected within this distance range.

[0013] Based on the above solution, a further improvement is made as follows: one end of each support column is connected to form an integrated structure through a connecting plate, which makes it easier to operate the support columns.

[0014] Based on the above solution, a further improvement is made as follows: a groove for placing weights is provided on the bottom plate, wherein the supporting through holes are evenly distributed in the groove at the center of the bottom plate.

[0015] On the basis of the above scheme, a further improvement is made as follows: the center of gravity of the counterweight coincides with the center of gravity of the base plate.

[0016] On the basis of the above scheme, a further improvement is made as follows: there are multiple counterweights stacked up and down.

[0017] On the basis of the above solution, a further improvement is made as follows: columns are provided on the four corners of the simulated container, and corner pieces are provided at the ends of the four columns for adapting and connecting with the rotary locks of the spreader.

[0018] On the basis of the above scheme, further improvements are made as follows: a truck-mounted crane transport vehicle is used to carry the simulated container and weights for movement, and the crane of the truck-mounted crane transport vehicle is used to lift and transfer the weights.

[0019] Based on the above solution, a further improvement is made as follows: the simulated container is made by removing the top and side panels of a standard container. This not only reduces the cost of custom processing, but also makes the simulated container more realistically simulate the container to be measured, improving calibration accuracy.

[0020] The beneficial effects of the present invention are as follows: the present application simulates a container to match the weight and size of the actual container to be tested, so as to simulate the actual situation as much as possible, sets a counterweight to simulate the weight of the container flat car, and supports the counterweight at a certain distance through the support column to simulate the situation that the F-TR lock may only be connected after the container is lifted a certain distance to deal with the sudden loading of the container. The above simple scheme can realize the actual situation of the container and the container when it is connected by the F-TR lock, so that the calibration variables are fewer and closer to the real scene, thereby improving the accuracy of the calibration. Moreover, the above scheme is simple and convenient, making the operation process very simple and efficient, and the calibration of the anti-connection detection module can be quickly realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic diagram of the specific structure of a simulated container in one embodiment of the F-TR lock hooking prevention calibration method of the container overload and unbalanced load detection device of the present invention;

[0022] Figure 2 This is a cross-sectional view of the simulated container;

[0023] Figure 3 is a top view of the rectangular base plate;

[0024] Figure 4 A three-dimensional diagram of the support column supporting the counterweight;

[0025] In the figure: 1- rectangular base plate, 11- groove, 12- supporting through hole, 2- column, 21- corner piece, 3- weight, 4- supporting column. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0028] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0029] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0030] An embodiment of the container overload detection device anti-F-TR lock hook calibration method of the present invention includes the following steps:

[0031] Place the counterweight on the support column at the bottom of the simulated container so that there is a certain distance between the counterweight and the bottom plate, and the weight of the simulated container matches the weight of the container to be tested; set multiple support perforations penetrating the bottom plate at the bottom of the simulated container, and install support columns in the support perforations, and the length of the support columns is greater than the thickness of the bottom plate; connect the lifting device of the container overload detection device to the simulated container, and lift the simulated container; when the bottom plate of the simulated container contacts the counterweight, check whether the anti-hooking detection module alarms.

[0032] The simulated container consists of a rectangular base plate, columns, and multiple weights mounted on the base plate. The combined weight of the base plate, columns, and weights simulates the total weight of a real container. The spacing between the counterweights and the base plate ranges from 0 to 120 mm. Each support column is connected at one end by a connecting plate to form a single structure. The base plate is provided with a recess for accommodating the weights, with the central recess containing the supporting perforations evenly distributed. The center of gravity of the counterweights coincides with that of the base plate. Multiple counterweights are stacked one on top of the other.

[0033] The rectangular bottom plate of the simulated container is uniformly distributed along its length, with each group comprising multiple positioning structures uniformly distributed across its width. A coordinate origin is set on the rectangular bottom plate, and the coordinate values ​​of each positioning structure relative to the coordinate origin are known. Each weight is detachably connected to the positioning structure, which secures the weight so that its center of gravity coincides with the center of the corresponding positioning structure. The positioning structures include unloaded positioning structures (without weights) and loaded positioning structures (with weights). The number and position of the unloaded positioning structures are selected. The positioning structures are grooves provided in the rectangular bottom plate, with the shape and dimensions matching those of the bottom of the weights. Because the weights are relatively heavy, weighing at least several hundred or even thousands of kilograms, the use of other complex positioning structures would require excessively high precision in operation and adjustment. Using grooves to position the weights allows the weights to be placed directly on the grooves. This simple and user-friendly structure facilitates the insertion and removal of the weights. Furthermore, the weights are relatively heavy, making them difficult to remove from the grooves due to their own weight, thus providing a stable and secure fit. Five positioning structure groups are arranged along the length of the rectangular baseplate, each consisting of three positioning structures evenly spaced along its width. This layout allows for the selection of standard one-ton weights and facilitates gross weight adjustment and offset setting. The simulated container is equipped with columns at each corner, each with corner fittings at its end for connection to the spreader's twistlocks. A truck-mounted crane transports the simulated container and weights, and the weights are hoisted and transferred using the truck-mounted crane's crane. Truck-mounted cranes, also known as truck cranes, are standard products that can be used directly, avoiding the high cost of customization. The crane's crane also facilitates the handling of the simulated container and its contents, such as adjusting the number of weights and offset setting. When calibrating the gross weight without offset setting, the loading and positioning structures are arranged symmetrically on the rectangular baseplate. By reducing the number of loading and positioning structures, the simulated container's gross weight can be adjusted to meet the requirements for selecting calibration points within the ranges of 5t-10t, 10t-15t, and 15t-20t. The simulated container is made by removing the top and side panels of a standard container. This reduces the cost of custom processing while also allowing the simulated container to more realistically simulate the container being measured, improving calibration accuracy.

[0034] Specifically, if Figure 1 As shown, the simulated container includes a rectangular bottom plate 1, columns 2, and weights 3. In this embodiment, the simulated container is modified from a standard 20-foot container, and can also be customized in other embodiments.

[0035] Specifically, the rectangular base plate 1 is a rectangular plate, and a plurality of positioning structure groups are distributed along the length direction of the rectangular plate. Each positioning structure group includes a plurality of positioning structures evenly distributed along the width direction. In this embodiment, the positioning structure is a groove 11 provided on the upper surface of the rectangular plate. The shape of the groove 11 is adapted to the shape of the bottom of the weight 3 so as to limit the position of the weight 3 after it is placed therein. Due to the heavy weight of the weight 3, the provision of the groove 11 allows the weight 3 to have only one degree of freedom in the upward direction. Due to its heavy deadweight, the weight 3 is not easy to move upward. The arrangement of the groove 11 facilitates assembly and disassembly positioning, while ensuring that the weight 3 will not move easily. The groove 11 is a rectangular groove, and the bottom of the weight 3 is a rectangular platform. There are five positioning structure groups, and each positioning structure group includes three positioning structures. Since the calibration method specified in the standard requires that the total weight needs to be within the ranges of 5-10 tons, 10-15 tons, and 15-20 tons, calibration points are selected. A 3×5 matrix arrangement is set through the positioning structure, and each weight 3 weighs 1 ton. By removing a certain number of weights 3, the total weight can be within the three weight ranges while ensuring that the arrangement of each weight 3 is uniform, so as to complete the measurement without deviation.

[0036] There are multiple weights 3, each used for detachable connection with the corresponding positioning structure. In this embodiment, there are 17 weights 3, and the corresponding grooves 11 are 3×5, totaling 15. One or more weights 3 can be selectively placed in each groove 11. When multiple weights 3 are placed, they need to be stacked. Four cylindrical support holes 12 are provided in the middle groove 11, and the four support holes 12 are evenly distributed in the groove 11. Four corresponding support columns 4 are provided, and the four support columns 4 can slide in the support holes 12 respectively. The length of the support column 4 is greater than the thickness of the rectangular base plate 1, so that the weights 3 located on the four support columns 4 can be lifted up, so that the weights 3 have a certain distance from the bottom of the groove 11, which is convenient for subsequent sudden loading of the rectangular base plate 1 to simulate hooked loading. The four support columns 4 can also be connected as a whole by a thin metal plate for easy movement and use.

[0037] There are four columns 2, which are fixed at the four corners of the rectangular base plate 1 respectively. The top of the column 2 is provided with a corner piece 21 for adapting to the rotary lock of the spreader of the container overload detection device. Several columns 2 can also be added, for example, several columns can be arranged symmetrically on the long side of the rectangular base plate 1.

[0038] The calibration box or simulated container in this application refers to a standard container that has been stripped of side panels and top panels, has grooves and support holes on the bottom panel processed, and has counterweights added so that its total weight is the same or similar to that of a real container.

[0039] The coordinate origin in this embodiment is set at the center of the base plate. In other embodiments, it can also be set at a corner of the base plate.

[0040] The positioning structure of this embodiment is a groove. In other embodiments, an electromagnet can also be used as the positioning structure to adsorb the weight on the electromagnet, or a structure with multiple limiting columns can be used to limit each weight.

[0041] The counterweights in this embodiment are ordinary weights, that is, weights used to set the bias, but their function is to replace the weight of the container flat car. They are named after their function. This embodiment has three pieces with a total weight of 3t, which is close to the weight of the container flat car.

[0042] When in use, the truck crane can carry the simulated container to the position to be tested, and the crane arm can complete the lifting of the simulated container, which is convenient for docking with the container overload detection device to be calibrated. The rotary lock on the container sling can be directly connected with the corner pieces 21 at the four corners of the simulated container, which is convenient for lifting the simulated container. The simulated container is provided with multiple positioning structure groups on the rectangular bottom plate 1, and each group includes multiple positioning structures, so that the coordinate position of each positioning structure is fixed and measurable. The weight 3 is a standard weight. After docking it with the positioning structure, the coordinate of the weight 3 is also determined, which is convenient for subsequent calculations. The weight 3 can move freely between the positioning structures to facilitate bias setting and facilitate bias detection in the subsequent calibration process.

[0043] When performing anti-F-TR lock hook calibration: pre-install a support column at the support perforation at the bottom of the middlemost groove of the bottom plate, and use the crane of the truck crane to stack multiple weights (as counterweights) on the top of the support column, and make the center of gravity of the counterweights as close to the center of the groove as possible. The total weight of the simulated container and the weights inside it should be basically the same or consistent with the total weight of the actual container to be tested. Connect the rotating lock of the sling of the container overload detection device to the corner piece at the top of the simulated container column, and lift the simulated container. Continuously observe the anti-hooking detection module during the lifting process. When the bottom plate of the simulated container contacts the counterweight, check whether the anti-hooking detection module alarms. If it alarms normally, there is no need to adjust the anti-hooking detection module. If the alarm is delayed, that is, the time from the contact between the bottom plate of the simulated container and the counterweight to the alarm is not within the predetermined range, adjust the anti-hooking detection module as much as possible to make it alarm in time. If there is no alarm, repair or replace the anti-hooking detection module. This application simulates a container to match the weight and size of the actual container to be tested to simulate the actual situation as much as possible, sets counterweights to simulate the weight of the container flat car, and supports the counterweights at a certain distance through support columns to simulate the situation where the F-TR lock may only be connected after the container is lifted a certain distance to deal with sudden loading of the container. The above simple solution can realize the actual situation of the container and the container when it is connected by the F-TR lock, making the calibration variables less and closer to the real scene, thereby improving the accuracy of the calibration. Moreover, the above solution is simple and convenient, making the operation process very simple and efficient, and can quickly realize the calibration of the anti-connection detection module.

[0044] It can be seen that compared with the calibration method in the prior art, the present application has the characteristics of convenient setting, calculation, adjustment and operation. Moreover, since the weight 3 is fixed by the positioning structure and is not easy to move during the subsequent calibration process, it has the characteristic of stable position, thereby ensuring the accuracy of the subsequent calibration.

[0045] The specific calibration process is as follows:

[0046] 1. Calibration of eccentric load, indication error and repeatability

[0047] Use a standard weight that is no less than 25% of the maximum weighing capacity of a single weighing sensor of the container overload detection device to load the container. In this embodiment, a standard weight of 1 ton is used, such as Figure 3 As shown, first place 15 weights in the corresponding 15 grooves of the rectangular bottom plate, plus the weight of the simulated container itself (about 2 tons), a total of 17 tons, which can directly meet the total weight range of 15-20t. The rotary locks of the spreader of the container overload detection device are respectively matched with the corner fittings on the four corners of the simulated container. By lifting the simulated container, the loaded weights can act on the weighing sensor as much as possible, and the sensor's overload indication is recorded. The error should not exceed the maximum allowable error of the weighing section.

[0048] Later in Figure 3 In the figure shown, the weights numbered 2, 7, 9, and 14 are lifted out by a crane, simulating a total container weight of 13 tons, which satisfies the test for a total weight range of 10t-15t. Alternatively, the three weights 7, 8, and 9 are lifted out, or the four weights 2, 5, 11, and 14 are lifted out, that is, the weights in symmetrical positions are lifted out, so that the remaining weights remain in symmetrical positions to meet the test without bias. When bias is required, the weights in a certain position are lifted out to make the position of the overall weights no longer symmetrical.

[0049] Similarly, continue to lift out a few weights so that the total weight is within the range of 5t-10t.

[0050] 2. Static measurement

[0051] a) Place the weights in a rectangular array within the container, i.e., the remaining weights are symmetrically positioned, with their centers of gravity close to the center (i.e., both the preset values ​​for the lateral offset and the preset values ​​for the longitudinal eccentricity are zero). The weights are reliably reinforced using the grooves on the rectangular base plate and the weights' own weight. The detection device performs three pre-measurements (optionally without taking readings) before conducting the formal measurement. The suspended over-eccentricity detection device should record the reading after the simulated container has stabilized for 5 seconds. The simulated container should be reliably placed on the ground for at least 5 minutes between measurements. Repeat the measurement 10 times. The error in the indicated gross weight of the simulated container is calculated using formula (1).

[0052] (1)

[0053] Where:

[0054] -Indication error, %;

[0055] - Average value of 10 measurements by the detection device, kg;

[0056] Nominal value of weight mass, kg;

[0057] —Reference value (20000), kg.

[0058] The static measurement error of the lateral offset and longitudinal offset weight is the difference between the measurement result and the preset value of the corresponding parameter. The static measurement repeatability is the difference between the maximum and minimum values ​​of the corresponding parameter measured 10 times.

[0059] b) Adjust the center of gravity of the weights in the simulated container to set the offset. For example, lift the weights at a certain position to maintain the overall rectangular layout. The theoretical lateral offset is between 20mm and 50mm, and the theoretical longitudinal offset is between 500kg and 2000kg (the weight of the weights within 50% of the container length must not exceed 60% of the total weight of the weights). Calculate the preset value of the lateral offset in the simulated container according to formula (2), and the preset value of the longitudinal offset according to formula (3). Record the offset information. Obtain the simulated container's gross weight, lateral offset, and longitudinal offset according to the measurement process in step a), and calculate the indication error and repeatability.

[0060]

[0061] Where:

[0062] -Preset value of simulated container lateral offset, mm;

[0063] -mass of the ith weight, kg;

[0064] The horizontal coordinate of the center of gravity of the i-th weight, mm.

[0065]

[0066] Where:

[0067] --Preset value of longitudinal partial weight of container, kg;

[0068] --The vertical coordinate of the center of gravity of the i-th weight, mm;

[0069] Y--fixed distance, mm.

[0070] 3. Dynamic indication error measurement

[0071] After completing steps a) and b) of each calibration point, perform the bias setting before and after each calibration point.

[0072] Simulating normal operating procedures, 10 consecutive measurements were performed under different simulated container states (stable, swaying with varying amplitudes, and lateral movement). The simulated container reliably landed for no less than 5 minutes between measurements. The dynamic measurement indication error of gross weight was calculated using formula (1). The dynamic measurement indication error of lateral offset and longitudinal offset weight was calculated as the difference between the measurement result and the preset value of the corresponding parameter of the detection device. The dynamic measurement repeatability was calculated as the difference between the maximum and minimum values ​​of the 10 measurement data for the corresponding parameter.

[0073] 4. F-TR lock anti-hook function test

[0074] like Figure 2 、 4 As shown, support columns of the same length are installed in the support through-holes in the groove in the middle position of the rectangular bottom plate, and the length of the support columns is greater than the thickness of the rectangular bottom plate. Multiple weights are stacked on the top of the four support columns. When the simulated container is lifted, the stacked weights do not contact the rectangular bottom plate at the beginning, and the weight of the weights is not loaded on the rectangular bottom plate. When it is lifted to a certain distance, so that the lower surface of the stacked weights contacts the bottom surface of the groove, the rectangular bottom plate will carry the stacked weights and move upward, that is, the weight of the stacked weights will be instantaneously loaded on the rectangular bottom plate, which can simulate the connection of the F-TR lock to the container. At this time, if the corresponding module of the container overload detection device alarms in time, the calibration result is normal. Otherwise, the calibration result is abnormal, and the corresponding detection module needs to be repaired or replaced.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A method for calibrating the container overload detection device to prevent F-TR lock hooking, characterized in that: The following steps are involved: S10, placing a counterweight on the support column at the bottom of the simulated container so that there is a certain distance between the counterweight and the bottom plate, and the weight of the simulated container matches the weight of the container to be tested; A plurality of supporting holes penetrating the bottom plate are provided at the bottom of the simulated container, and supporting columns are installed in the supporting holes, and the length of the supporting columns is greater than the thickness of the bottom plate; S20, connecting the lifting device of the container overload and unbalanced load detection device to the simulated container and lifting the simulated container; S30. When the bottom plate of the simulated container contacts the counterweight, check whether the anti-hooking detection module issues an alarm.

2. The method for calibrating the container overload detection device to prevent F-TR lock hooking according to claim 1 is characterized in that: The simulated container includes a bottom plate, columns, and a plurality of weights arranged on the bottom plate. The total weight of the bottom plate, columns, and weights simulates the total weight of a real container.

3. The method for calibrating the container overload detection device to prevent F-TR lock hooking according to claim 1 is characterized in that: The distance between the counterweight and the base plate is 0-120mm.

4. The method for calibrating the container overload detection device to prevent F-TR lock hooking according to claim 1 is characterized in that: One end of each support column is connected to form an integrated structure through a connecting plate.

5. The method for calibrating the container overload detection device to prevent F-TR lock hooking according to claim 2 is characterized in that: The bottom plate is provided with a groove for placing weights, wherein the supporting through holes are evenly distributed in the groove at the center of the bottom plate.

6. The method for calibrating the container overload detection device to prevent F-TR lock hooking according to claim 1 is characterized in that: The center of gravity of the counterweight coincides with the center of gravity of the base plate.

7. The method for calibrating the container overload detection device to prevent F-TR lock hooking according to claim 1 is characterized in that: There are multiple counterweights stacked up one above the other.

8. The method for calibrating the container overload detection device to prevent F-TR lock hooking according to claim 2 is characterized in that: The four corners of the simulated container are respectively provided with the columns, and the ends of the four columns are provided with corner pieces for adapting and connecting with the rotary locks of the spreader.

9. The method for calibrating the container overload detection device to prevent F-TR lock hooking according to claim 1, characterized in that: Use a truck-mounted crane transport vehicle to carry the simulated container and weights for movement, and use the crane on the truck-mounted crane transport vehicle to lift and transfer the weights.

10. The method for calibrating the container overload detection device to prevent F-TR lock hooking according to claim 1, characterized in that: The simulated container is made by removing the top and side panels of a standard container.

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