A distributed detection combination jaw plate and jaw crusher

Abstract

The utility model discloses a kind of distributed detection combination jaw plate, including jaw plate body, data collection module, computing module, multiple first strain gauges and multiple second strain gauges, multiple first strain gauges are scattered and attached to the back of jaw plate body, the back of jaw plate body is scattered and is equipped with multiple bosses, multiple second strain gauges are attached to the side of multiple bosses, each first strain gauge and each second strain gauge are connected with data collection module, data collection module is connected with computing module, computing module can carry out wear loss calculation according to the data collected by data collection module, so wear loss obtained can be judged whether it needs to be replaced jaw plate body, and will not be affected by the movement of jaw plate body in the work of crusher and dust, can timely and accurately reflect the wear condition of jaw plate body. The utility model discloses a kind of jaw crusher including above-mentioned distributed detection combination jaw plate.

Description

Technical Field

[0001] This utility model relates to the field of jaw crusher technology, and in particular to a distributed detection combined jaw plate and jaw crusher. Background Technology

[0002] Ore crushing technology and equipment have numerous applications in geological prospecting, mineral production, and scientific research. Jaw crushers are widely used in production due to their wide applicability, non-clogging properties, cost-effectiveness, and ease of maintenance. However, in actual production, the jaw plates are subjected to friction, compression, and impact from the ore, resulting in wear, cracks, and even surface material peeling and breakage. Therefore, jaw plates are consumable parts and generally need to be replaced every 1-3 months depending on the specific working conditions. However, the wear condition of the jaw plates is often judged by the operator's naked eye, which relies on the operator's experience and can easily lead to premature or delayed replacement. Premature replacement increases the frequency of jaw plate replacement, thus increasing economic costs, while delayed replacement may damage the crusher or even endanger the lives of the operators. To address this issue, Chinese patent document CN108927246B discloses a jaw crusher that uses a distance sensor to monitor the wear of the jaw plates, reducing the need for manual monitoring. However, the applicant discovered that during operation, the moving jaw plate needs to move, which prevents the distance sensor from promptly reflecting the wear condition. Furthermore, a large amount of dust can interfere with the measurement results, leading to inaccurate readings. On the other hand, monitoring only the wear in one direction of the jaw plate does not reflect the strain in other directions. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a distributed detection combination jaw plate and jaw crusher that can reflect wear conditions in a timely and accurate manner.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A distributed detection combined jaw plate includes a jaw plate body, a data collection module, a calculation module, multiple first strain gauges, and multiple second strain gauges. The multiple first strain gauges are dispersedly attached to the back of the jaw plate body, and multiple protrusions are dispersedly provided on the back of the jaw plate body. The multiple second strain gauges are attached to the sides of the multiple protrusions. Each first strain gauge and each second strain gauge is connected to the data collection module, and the data collection module is connected to the calculation module. The first strain gauges and second strain gauges are used to detect the strain of the jaw plate body in different directions.

[0005] As a further improvement to the above technical solution: the jaw plate body includes a mounting plate and a plurality of toothed plates, the toothed plates having a plurality of protruding teeth along their length direction, and the first strain gauge and the protrusions being located on the back side of the mounting plate; As a further improvement to the above technical solution: the toothed plate is parallel to the length direction of the mounting plate, and a plurality of the toothed plates are installed on the front side of the mounting plate and arranged at intervals along the width direction of the mounting plate; Alternatively, the toothed plate is parallel to the width direction of the mounting plate, and multiple toothed plates are mounted on the front of the mounting plate and arranged at intervals along the length direction of the mounting plate.

[0006] As a further improvement to the above technical solution: the plurality of first strain gauges can be divided into multiple rows, and the first strain gauges in each row are arranged at intervals along the length direction of the toothed plate, and each toothed plate corresponds to at least one row of first strain gauges.

[0007] As a further improvement to the above technical solution: the plurality of protrusions can be divided into multiple rows, and the protrusions in each row are arranged at intervals along the length direction of the toothed plate, and each toothed plate corresponds to at least one row of protrusions.

[0008] As a further improvement to the above technical solution: the toothed plate is detachably mounted on the mounting plate.

[0009] As a further improvement to the above technical solution: the toothed plate is fixed to the mounting plate by screws.

[0010] As a further improvement to the above technical solution: the first strain gauge and the second strain gauge are foil strain gauges.

[0011] As a further improvement to the above technical solution: the protrusion is in the shape of a cuboid and is arranged perpendicular to the jaw plate body.

[0012] As a further improvement to the above technical solution: the length direction of the first strain gauge is parallel to the length direction of the toothed plate, and the length direction of the second strain gauge is perpendicular to the toothed plate.

[0013] A jaw crusher includes a distributed detection combined jaw plate as described above.

[0014] Compared with the prior art, the advantages of this utility model are: This invention discloses a distributed detection combined jaw plate, which has multiple first strain gauges and second strain gauges on the back of the jaw plate body. When the jaw plate body wears, it will deform. The first strain gauges can be used to monitor the strain parallel to the direction of the jaw plate body, and the second strain gauges can measure the strain perpendicular to the direction of the jaw plate body. The data collection module can collect the data of each first strain gauge and each second strain gauge, and the calculation module can calculate the wear amount based on the data collected by the data collection module. In this way, it can be determined whether the jaw plate body needs to be replaced based on the obtained wear amount. Compared with the prior art that uses a distance sensor for measurement, this invention uses strain gauges for measurement and is not affected by the movement of the jaw plate body and dust during the operation of the crusher, so as to reflect the wear condition of the jaw plate body in a timely and accurate manner.

[0015] The jaw crusher disclosed in this utility model has all the advantages of distributed detection combined jaw plates. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the connection relationship of the distributed detection combined jaw plates of this utility model.

[0017] Figure 2 This is a schematic diagram of the jaw plate body of the distributed detection combined jaw plate of this utility model.

[0018] Figure 3 yes Figure 2 A magnified structural diagram of part A in the middle.

[0019] Figure 4 This is a schematic diagram showing the arrangement of the first and second strain gauges on the distributed detection combined jaw plate of this utility model.

[0020] Figure 5 This is a schematic diagram showing the deformation direction generated when the distributed detection combined jaw plate of this utility model breaks rocks.

[0021] Figure 6 This is a schematic diagram of the structure of the jaw crusher of this utility model.

[0022] Figure 7 This is a flowchart illustrating the operation of the jaw crusher of this utility model.

[0023] The labels in the diagram represent: 1. Jaw plate body; 11. Mounting plate; 12. Tooth plate; 2. First strain gauge; 3. Second strain gauge; 4. Protrusion; 5. Data collection module; 6. Calculation module; 7. Screw. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Example 1 Figures 1 to 5 This invention illustrates an embodiment of a distributed detection combined jaw plate. The distributed detection combined jaw plate of this embodiment includes a jaw plate body 1, a data collection module 5, a calculation module 6, multiple first strain gauges 2, and multiple second strain gauges 3. The multiple first strain gauges 2 are dispersedly attached to the back surface of the jaw plate body 1. Multiple protrusions 4 are dispersedly provided on the back surface of the jaw plate body 1. The multiple second strain gauges 3 are attached to the sides of the multiple protrusions 4. Each first strain gauge 2 and each second strain gauge 3 is connected to the data collection module 5, and the data collection module 5 is connected to the calculation module 6. The first strain gauges 2 and the second strain gauges 3 are used to detect strain in different directions of the jaw plate body 1.

[0028] This distributed detection combined jaw plate has multiple first strain gauges 2 and second strain gauges 3 on the back of the jaw plate body 1. When the jaw plate body 1 wears, it will deform. The first strain gauges 2 can be used to monitor the strain in the direction parallel to the jaw plate body 1, and the second strain gauges 3 can measure the strain in the direction perpendicular to the jaw plate body 1. The data collection module 5 can collect the data of each first strain gauge 2 and each second strain gauge 3. The calculation module 6 can calculate the wear amount based on the data collected by the data collection module. In this way, it can be determined whether the jaw plate body 1 needs to be replaced based on the obtained wear amount. Compared with the prior art that uses a distance sensor for measurement, this utility model uses strain gauges for measurement and is not affected by the movement of the jaw plate body 1 and dust during the operation of the crusher, so as to timely and accurately detect the wear of the jaw plate body 1.

[0029] The jaw plate body 1 is divided into a moving jaw plate and a stationary jaw plate. The stationary jaw plate remains stationary during operation, while the moving jaw plate reciprocates under the drive of the motor and the eccentric wheel. In this embodiment, the first strain gauge 2 and the second strain gauge 3 are mounted on the moving jaw plate and are arranged in an array.

[0030] Preferably, the second strain gauges 3 are attached to the sides of the protrusions 4 in a one-to-one correspondence, and each side of the protrusion 4 is provided with a second strain gauge 3.

[0031] In this embodiment, the data collection module 5 is a dynamic strain gauge. The data collection module 5 is connected to each strain gauge 2 and each second strain gauge 3 via thin cables. During operation, the dynamic strain gauge switches to a multi-channel acquisition mode, setting a sampling rate of 5kHz per channel, and uses an FIR digital filter to eliminate equipment vibration noise. The calculation module 6 is a computer configured with a program for calculating wear. Specifically, in this embodiment, the back surface of the jaw plate body 1 is divided into multiple regions. The computer contains a finite element model of the jaw plate body 1. The initial strain data can be calibrated using the finite element model, and a strain-wear mapping relationship can be established by combining the historical wear data from the data collection module 5. The cumulative strain, i.e., the wear amount, in each region is dynamically calculated. The quantitative calculation formula for the wear amount is: ,in For the first For the cumulative wear amount of each area, see Figure 5 , ε τ The strain is parallel to the direction of the jaw plate body 1 (measured by the first strain gauge 2 in the region). ε σ The strain perpendicular to the jaw plate body 1 (measured by the second strain gauge 3 within the region) will trigger a warning signal (which could be an audible or visual signal) when the wear exceeds a set wear threshold. In other embodiments, an alarm mechanism similar to a siren can also be connected to issue an alarm. In this embodiment, if the computer detects that the strain in a certain area exceeds a set warning value within a certain time, it will also issue an alarm to alert personnel that a rock may be stuck in the jaw plate body 1. It should be noted that... It is an indirect indicator of wear, because wear cannot be measured by strain or cumulative strain. However, it can be determined through prior experiments. Establish a database association with the calibrated weight loss to achieve... This reflects the true amount of wear and tear.

[0032] Further, see Figures 1 to 3In this embodiment, the jaw plate body 1 includes a mounting plate 11 and a plurality of toothed plates 12. Each toothed plate 12 has a plurality of protruding teeth along its length. The first strain gauge 2 and the protrusion 4 are located on the back side of the mounting plate 11. The toothed plates 12 are parallel to the width direction of the mounting plate 11. The plurality of toothed plates 12 are mounted on the front side of the mounting plate 11 and are spaced apart along the length direction of the mounting plate 11. Of course, in other embodiments, the toothed plates 12 may also be parallel to the length direction of the mounting plate 11, and the plurality of toothed plates 12 may be mounted on the front side of the mounting plate 11 and spaced apart along the width direction of the mounting plate 11.

[0033] Further, see Figure 2 and Figure 3 In this embodiment, the protrusion 4 is cuboid in shape and is perpendicular to the jaw plate body 1. Of course, in other embodiments, the protrusion 4 can also be other shapes, but the cuboid shape makes it easier for the second strain gauge 3 to fit against the protrusion 4.

[0034] Further, see Figures 1 to 3 In this embodiment, the length direction of the first strain gauge 2 is parallel to the length direction of the toothed plate 12, and the length direction of the second strain gauge 3 is perpendicular to the toothed plate 12, which helps to ensure the accuracy of the measurement of the first strain gauge 2 and the second strain gauge 3.

[0035] As a preferred embodiment, see Figures 1 to 4 Multiple first strain gauges 2 can be arranged in multiple rows, with the first strain gauges 2 in each row arranged at intervals along the length of the toothed plate 12. Each toothed plate 12 corresponds to at least one row of first strain gauges 2, ensuring that data can be collected from each toothed plate 12. ε τ Similarly, the multiple protrusions 4 can be divided into multiple rows, with the protrusions 4 in each row arranged at intervals along the length of the toothed plate 12. Each toothed plate 12 corresponds to at least one row of protrusions 4, ensuring that the material of each toothed plate 12 can be collected. ε σ Preferably, the toothed plate 12 is detachably mounted on the mounting plate 11. The calculation module 6 can calculate the wear condition of each toothed plate 12 to find the toothed plate 12 that needs to be replaced. Only the toothed plate 12 with wear exceeding the threshold needs to be replaced to continue safe use, saving the time and economic cost of replacing the entire jaw plate body 1.

[0036] Further, see Figures 1 to 4 In this embodiment, the toothed plate 12 is fixed to the mounting plate 11 by screws 7. The structure is simple and the replacement of the toothed plate 12 is convenient and reliable. Preferably, the screws 7 are coated with epoxy resin adhesive for more reliable connection.

[0037] Furthermore, in this embodiment, the first strain gauge 2 and the second strain gauge 3 are both foil strain gauges. Foil strain gauges have a large area, are highly sensitive to strain, and have high measurement accuracy.

[0038] Furthermore, in this embodiment, the protruding teeth on the toothed plate 12 located on the lower side of the jaw plate body 1 are made of wear-resistant alloy material, and the arrangement density of the first strain gauge 2 and the second strain gauge 3 located on the lower side of the jaw plate body 1 is higher to accommodate the situation where the lower toothed plate 12 is more likely to come into contact with rocks during use. Specifically, the first strain gauge 2 and the second strain gauge 3 are conventionally pasted symmetrically on the jaw plate body 1 with a spacing of 20mm × 20mm, while the denser areas are pasted with a spacing of 10mm × 10mm. Of course, other spacings can also be used in other embodiments. In order to prevent the leads of the first strain gauge 2 and the second strain gauge 3 from being damaged by rocks, their leads are led out using armored shielded wires in this embodiment.

[0039] Example 2 Figure 6 An embodiment of the jaw crusher of this utility model is shown. The jaw crusher of this embodiment includes the distributed detection combined jaw plate of the first embodiment. Specifically, the distributed detection combined jaw plate is used as the moving jaw plate, which has the same advantages as the distributed detection combined jaw plate.

[0040] See Figure 7 The operating procedure of the jaw crusher in this embodiment is as follows: S1, attach the first strain gauge 2 and the second strain gauge 3 to the designated position of the jaw plate body 1 and connect them to the dynamic strain gauge, and connect the dynamic strain gauge to the computer. S2, turn on the dynamic strain gauge, perform zero calibration, and set the dynamic strain gauge to multi-channel acquisition mode, then turn on the jaw crusher; S3, feed ore into the jaw crusher; S4. The computer monitors and calculates the collected data. If it detects that the strain in a certain area is greater than the set warning value for a certain period of time, it will issue an alarm. If it calculates that the wear in a certain area exceeds the set wear threshold, it will issue an alarm. If an alarm is issued, it will jump to step S5. If no alarm is issued, the crushing operation will be completed and the wear value of each area will be recorded as the initial wear value for the next crushing operation. S5, stop feeding ore, and the worker can choose to replace the toothed plate 12 or clear the blockage depending on the specific situation, and repeat steps S3-S4 after completion.

[0041] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A distributed detection combined jaw plate, characterized in that: The jaw plate includes a jaw plate body (1), a data collection module (5), a calculation module (6), multiple first strain gauges (2) and multiple second strain gauges (3). The multiple first strain gauges (2) are distributed on the back of the jaw plate body (1). Multiple protrusions (4) are distributed on the back of the jaw plate body (1). The multiple second strain gauges (3) are distributed on the sides of the multiple protrusions (4). Each first strain gauge (2) and each second strain gauge (3) is connected to the data collection module (5). The data collection module (5) is connected to the calculation module (6). The first strain gauges (2) and the second strain gauges (3) are used to detect the strain of the jaw plate body (1) in different directions.

2. The distributed detection combined jaw plate according to claim 1, characterized in that: The jaw plate body (1) includes a mounting plate (11) and a plurality of toothed plates (12). The toothed plates (12) are provided with a plurality of protruding teeth along their length direction. The first strain gauge (2) and the protrusion (4) are located on the back side of the mounting plate (11). The toothed plate (12) is parallel to the length direction of the mounting plate (11), and a plurality of the toothed plates (12) are installed on the front side of the mounting plate (11) and are spaced apart along the width direction of the mounting plate (11); Alternatively, the toothed plate (12) is parallel to the width direction of the mounting plate (11), and a plurality of the toothed plates (12) are installed on the front side of the mounting plate (11) and arranged at intervals along the length direction of the mounting plate (11).

3. The distributed detection combined jaw plate according to claim 2, characterized in that: The first strain gauges (2) can be divided into multiple rows, and the first strain gauges (2) in each row are arranged at intervals along the length direction of the toothed plate (12). Each toothed plate (12) corresponds to at least one row of the first strain gauges (2).

4. The distributed detection combined jaw plate according to claim 2, characterized in that: The protrusions (4) can be divided into multiple rows, and the protrusions (4) in each row are arranged at intervals along the length direction of the toothed plate (12). Each toothed plate (12) corresponds to at least one row of protrusions (4).

5. The distributed detection combined jaw plate according to any one of claims 2 to 4, characterized in that: The toothed plate (12) is detachably mounted on the mounting plate (11).

6. The distributed detection combined jaw plate according to claim 5, characterized in that: The toothed plate (12) is fixed to the mounting plate (11) by screws (7).

7. The distributed detection combined jaw plate according to any one of claims 1 to 4, characterized in that: The first strain gauge (2) and the second strain gauge (3) are foil strain gauges.

8. The distributed detection combined jaw plate according to any one of claims 1 to 4, characterized in that: The protrusion (4) is rectangular and is positioned perpendicular to the jaw plate body (1).

9. The distributed detection combined jaw plate according to any one of claims 2 to 4, characterized in that: The length direction of the first strain gauge (2) is parallel to the length direction of the toothed plate (12), and the length direction of the second strain gauge (3) is perpendicular to the length direction of the toothed plate (12).

10. A jaw crusher, characterized in that: Includes the distributed detection combination jaw plate as described in any one of claims 1 to 9.

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