Cotton moisture regain online detection device and method

Abstract

The invention discloses a cotton moisture regain online detection device and method, the device comprises a mounting plate and a detection support table, the mounting plate is provided with a hollow part, the detection support table is arranged on the hollow part of the mounting plate, the detection support table is provided with a detection mechanism, the detection support table is in sliding fit with the hollow part of the mounting plate, and the detection mechanism is arranged on the detection support table. An elastic displacement mechanism is arranged on the outer side of the mounting plate, the detection supporting table is fixedly connected with the elastic displacement mechanism, and when the detection supporting table is subjected to extrusion force of cotton, the elastic displacement mechanism is pressed to move in the direction away from the cotton flow channel, or the elastic displacement mechanism pushes the detection supporting table to move in the direction of the cotton flow channel; a switch mechanism is further arranged, and when the elastic displacement mechanism reaches a set detection position, the detection mechanism starts detection. The cotton moisture regain online detection method and device are accurate, reliable and easy to operate, and quality control in the cotton treatment process is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural product detection equipment, and in particular to an online detection device and method for moisture regain of cotton. Background Art

[0002] Affected by the machine picking equipment, picking temperature and humidity conditions, etc., the moisture regain of machine-picked cotton in my country is quite different. Moisture regain is one of the key factors affecting the quality of cotton processing, and different cotton processing technology links have different suitable cotton regains. Therefore, in order to achieve the most suitable moisture regain during cotton processing, it is necessary to accurately detect the moisture regain of the fed cotton, and then adjust the moisture regain of the cotton through drying or humidification equipment, and then perform corresponding processing on the cotton after the moisture regain is adjusted to reduce the mechanical damage of cotton fibers and improve the quality of cotton processing.

[0003] The moisture regain detection of cotton needs to be carried out under constant pressure. In the prior art, the methods for detecting the moisture regain of cotton mainly include insertion type, pipeline online flap sampling type, cotton storage box type, etc. The detection positions adapted to these moisture regain detection methods often have specific requirements. For example, the insertion type is used for the moisture regain detection of cotton in the carriage during the purchasing process. The detection pressure is provided by manual or mechanical insertion devices, and the pressure fluctuates greatly due to the influence of material density, etc.; the pipeline online flap sampling type is suitable for the pneumatic conveying process of materials. The sampling volume is difficult to guarantee during the detection process, and the detection pressure is affected by the amount of sampling; the cotton storage box type requires installation at a certain distance above the feeding roller, which affects the uniformity of the material and the storage height of the cotton. The electrode detection method is based on the relationship between cotton regain and electrical conductivity. It indirectly determines the regain by measuring the electrical conductivity of cotton, such as the technical method and device disclosed in the patent application number "202010489908.9". However, the accuracy of the electrode detection method is easily affected by the area of ​​the two electrodes, fiber quality, voltage and pressure, and the materials in the mechanical conveying process of the mold opening and feeding link are large in quantity, dense and uneven. Therefore, the cotton regain detection method and device in the prior art cannot meet the needs of online constant pressure precision detection. Summary of the invention

[0004] In order to overcome the problems in the prior art, the purpose of the present invention is to provide an online detection device and method for cotton moisture regain, which can improve the stability of cotton moisture regain detection pressure during the transportation of large, uneven and dense mechanical materials, thereby improving the accuracy of cotton moisture regain detection and meeting the needs of cotton moisture regain detection in the mold opening and flower feeding link.

[0005] To achieve the above-mentioned purpose, the present invention provides an online detection device for cotton regain, comprising: a mounting plate, a detection support platform, the mounting plate being provided with a hollow portion, the detection support platform being installed on the hollow portion of the mounting plate, a detection mechanism being provided on the detection support platform, and characterized in that the detection support platform is slidably matched with the hollow portion of the mounting plate, an elastic displacement mechanism is provided on the outer side of the mounting plate, the detection support platform is fixedly connected to the elastic displacement mechanism, and when the detection support platform is subjected to the squeezing force of the cotton, the elastic displacement mechanism is pressed to move in a direction away from the cotton flow channel, or the elastic displacement mechanism pushes the detection support platform to move in the direction of the cotton flow channel; a switch mechanism is also provided, and when the elastic displacement mechanism reaches a set detection position, the detection mechanism starts detection.

[0006] Furthermore, the elastic displacement mechanism is arranged on an outer support plate fixedly connected to the mounting plate, and the elastic displacement mechanism includes at least one elastic component and a guide component, one end of the guide component is fixed to the mounting plate, and the other end is fixed to the outer support plate, and the elastic component is sleeved on the guide component.

[0007] Furthermore, a flange connection seat is provided on the end surface of the detection support platform outside the cotton flow channel, and a plurality of mounting holes for the guide assembly to pass through are provided on the flange base, and the flange base is movably sleeved on the guide assembly.

[0008] Furthermore, the elastic component includes a mechanical elastic element, and positioning seats are provided at both ends of the mechanical elastic element. The guide component includes a guide rod and a guide rod support. The guide rod is assembled on the mounting plate and the outer support plate through the guide support. A linear bearing is also provided between the guide rod and the mounting hole of the flange connecting seat.

[0009] Furthermore, the elastic displacement mechanism also includes an upper mechanical limit device and a lower mechanical limit device, wherein one end of the upper mechanical limit device is fixedly connected to the outer support plate and the other end points to the flange base, and one end of the lower mechanical limit device is fixedly connected to the flange base and the other end points to the mounting plate.

[0010] Furthermore, the switch mechanism includes a compression position detection component and a compression position indicating plate, the compression position indicating plate is fixedly connected to the flange base, and the compression position detection component is fixedly connected to the outer support plate.

[0011] Furthermore, the detection mechanism is fixedly connected to the end surface of the detection support platform placed in the cotton flow channel.

[0012] Furthermore, the detection electrode is provided with an inclined surface for the cotton to fall.

[0013] Furthermore, it also includes a display, which is electrically connected to the detection mechanism; and a cover shell, which is fixedly connected to the outer side surface of the mounting plate.

[0014] The present invention also provides an online detection method for cotton regain, comprising: adjusting the detection pressure by adjusting the set displacement pressure of the lower mechanical limit device and adjusting the switch mechanism; the cotton enters the cotton flow channel, the cotton contacts the detection support platform and generates an extrusion pressure on the detection support platform, when the extrusion pressure of the cotton on the detection support platform is greater than the set displacement pressure, the elastic displacement mechanism drives the switch mechanism to start to displace in the direction away from the cotton flow channel; when the extrusion pressure of the cotton on the detection support platform is greater than the set detection pressure, the elastic displacement mechanism drives the switch mechanism to reach the set detection position, and the switch mechanism starts to send a detection signal; the detection mechanism receives the detection signal, collects the resistance value signal between the two detection electrodes, and converts the collected resistance value signal into the cotton regain; when the extrusion pressure of the cotton on the detection support platform is less than the set detection pressure, the elastic displacement mechanism drives the switch mechanism to start to displace in the direction close to the cotton flow channel, that is, the switch mechanism has not reached the detection position, the switch mechanism stops sending the detection signal, and the detection mechanism stops the moisture regain detection.

[0015] The present invention ensures that the cotton is fully in contact with the detection electrode and the pressure is stable through the elastic displacement mechanism, thereby improving the accuracy of cotton regain detection. When the cotton enters the cotton flow channel, the elastic displacement mechanism drives the switch mechanism to move through the contact and compression of the cotton on the detection electrode. Only when the switch mechanism reaches the predetermined detection position, the detection mechanism starts to detect the regain, thereby ensuring the consistency of the detection conditions. By setting the upper mechanical limit device and the lower mechanical limit device on the elastic mechanism, the displacement range of the detection support platform is limited, preventing the elastic displacement mechanism from damaging the device due to excessive compression or stretching, thereby improving the safety and reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of an online detection device for cotton moisture regain of the present invention; Figure 2 It is a partial cross-sectional view of a front view of an online detection device for moisture regain of cotton according to the present invention; Figure 3 It is a top cross-sectional view of an online detection device for moisture regain of cotton according to the present invention; Figure 4 It is a partial cross-sectional view of a left side view of an online detection device for moisture regain of cotton according to the present invention; Figure 5 It is a partial cross-sectional view from the right side of a cotton moisture regain online detection device of the present invention; Figure 6 It is an overall schematic diagram of the application of an online detection device for moisture regain of cotton according to the present invention; Figure 7 It is a partial schematic diagram of the application of an online detection device for moisture regain of cotton according to the present invention; Description of the drawings: 1. Cover, 2. Mounting plate, 3. Outer support plate, 4. Guide rod support, 5. Guide rod, 6. Detection electrode, 7. Linear bearing, 8. Compression spring, 9. Lower mechanical limit device, 10. Compression position indicator plate, 11. Upper mechanical limit device, 12. Compression position detection component, 13. Compression spring positioning seat, 14. Detection support table, 14-1. Cotton guide plate, 14-2. Flange base, 15 Cotton flow channel. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The "inside" and "outside" quoted in this specification are all referenced to the cotton flow channel, the side close to the cotton flow channel is the "inside", and the side away from the cotton flow channel is the "outside". Other terms quoted in this specification, such as "upper", "lower", "left", "right", etc., are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0018] Example 1 In the cotton processing, moisture regain is an important quality indicator, which directly affects the processing performance and product quality of cotton. Since the cotton in the feeding process is in a clumping shape, it has the characteristics of large quantity, different density and unevenness during transportation. The traditional moisture regain detection method is not only time-consuming and labor-intensive, but also cannot meet the requirements of online constant pressure accurate detection.

[0019] Therefore, the present invention provides an online detection device for cotton regain, which is installed on the side wall of the wallboard of the feeding and loosening part of the pit feeding machine or the mold opening machine conveying device, and keeps a certain distance from the loosening and pricking roller. The device comprises: a mounting plate 2 and a detection support platform 14, the mounting plate 2 is fixedly connected to the wallboard of the cotton flow channel 15, the mounting plate is provided with a hollow part, the detection support platform 14 is installed on the hollow part of the mounting plate 2, and is slidably matched with the hollow part of the mounting plate 2, an elastic displacement mechanism is provided on the outer side of the mounting plate 2, the detection support platform 14 is fixedly connected to the elastic displacement mechanism, when the detection support platform 14 is subjected to the squeezing force of the cotton, the elastic displacement mechanism is pressed to move away from the cotton flow channel 15, or the elastic displacement mechanism pushes the detection support platform 14 to move toward the cotton flow channel 15; a switch mechanism is also provided, and when the elastic displacement mechanism reaches the set detection position, the detection mechanism starts detection.

[0020] The end face of the detection support platform 14 placed on the inner side of the cotton flow channel 15 is a cotton guide plate 14-1, and the end face of the detection support platform placed on the outer side of the cotton flow channel 15 is fixedly connected to the flange base 14-2. Specifically, the cotton guide plate is an inclined surface, and the angle between the cotton guide plate 14-1 and the wall panel of the cotton flow channel 15 is 30°-60°, which is not easy to block the natural flow of cotton.

[0021] The elastic displacement mechanism includes an elastic component and a guide component. The outer side surface of the mounting plate 2 is fixedly connected with an outer support plate 3. One end of the guide component is fixed to the mounting plate 2, and the other end is fixed to the outer support plate 3. The elastic component is sleeved on the guide component between the outer support plate 3 and the flange base 14-2. Specifically, the elastic component is used to provide elastic displacement for the detection support platform, including a mechanical elastic element. In this embodiment, the mechanical elastic element is a compression spring 8, and compression spring positioning seats 13 are provided at both ends of the compression spring 8; the guide component is used to guide and stabilize the displacement of the detection support platform, including a guide rod 5 and a guide rod support 4. The guide rod 5 is assembled on the mounting plate 2 and the outer support plate 4 through the guide rod support 4. A linear bearing sleeve 7 is provided between the detection support platform 14 and the guide rod 5.

[0022] The elastic mechanism also includes at least one upper mechanical limit device and a lower mechanical limit device, which are used to set the upper and lower limits of the displacement of the detection support platform. One end of the upper mechanical limit device 11 is fixedly connected to the outer support plate 3, and the other end points to the flange base 14-2; one end of the lower mechanical limit rod 9 is fixedly connected to the mounting plate 2, and the free end of the elastic telescopic limiter 9 is fixedly connected to the flange base 14-2. In this embodiment, the upper mechanical limit device 11 and the lower mechanical limit device 9 both use buffer rubber head screws, and the heads of the buffer rubber head screws are made of polyurethane hot-adhesive rubber coating technology, which have the characteristics of anti-collision and wear resistance. During the working process, as the extrusion force of cotton on the detection support platform increases, the detection support platform continuously moves away from the cotton flow channel until the flange connecting plate at the bottom of the detection support platform conflicts with the head of the rubber head screw of the upper mechanical limit device and stops displacement. The upper mechanical limit device effectively solves the problem of excessive compression and loss of elasticity of the compression spring 8 due to excessive extrusion force of cotton on the detection support platform. The lower mechanical limit device 9 not only provides a pre-tightening force for the compression spring by adjusting the position where the buffer rubber head screw is fixed to the flange connection seat, but also can adjust the length of the detection support platform 14 penetrating into the cotton flow channel 15.

[0023] The switch mechanism is used to determine when to start the regain detection, and includes a compression position detection component 12 and a compression position indicator plate 13. The compression position indicator plate 13 is fixedly connected to the flange base 14-2. The compression position detection component 12 is fixedly connected to the outer support plate 3. The compression position indicator plate 13 moves to the sensing position of the compression position detection component under the drive of the elastic mechanism, and the detection component 12 starts to send a detection signal. When the compression position indicator plate 13 is away from the sensing position of the compression position detection component, the detection component 12 stops sending a detection signal. In addition, the switch mechanism can indirectly adjust the detection pressure of the cotton on the detection support platform by changing the size of the compression position indicator plate 13 or the position of the compression position detection component 12.

[0024] The detection mechanism is fixedly connected to the end face of the detection support platform 14 placed in the cotton flow channel 15, and the detection mechanism includes two detection electrodes 6 and a microprocessor. The detection electrodes are used to contact the cotton and collect resistance signals, and the microprocessor is used to analyze the resistance value between the two detection electrodes 6 to obtain the moisture regain of the cotton. The detection electrode 6 is fixedly connected to the cotton guide plate of the detection support platform 14, and the detection electrode 6 is electrically connected to the microprocessor. Specifically, the detection electrode 6 is provided with an inclined surface for the cotton to fall, so as to ensure the natural flow of the cotton.

[0025] This embodiment also includes a display, which is electrically connected to the microprocessor and is used to display the analysis results of the microprocessor.

[0026] This embodiment further includes a cover shell 1 , which is fixedly connected to the outer side surface of the mounting plate 2 .

[0027] In the cotton regain online detection device provided in this embodiment, cotton is transported horizontally in the cotton flow channel. When the loose cotton in a ball shape encounters the flow guide of the detection electrode, the detection electrode cannot be pressed down due to insufficient squeezing force of the cotton on the detection support platform, so the regain detection is not performed; when the dense cotton in a ball shape contacts the detection electrode, it will bring pressure to the elastic mechanism and start to move, triggering the switch mechanism to send a detection signal, and the detection electrode performs regain detection. This method can effectively avoid false detection caused by different cotton states, ensure that the pressure between the material and the detection electrode reaches the set value during the detection process, and improve the accuracy and reliability of the detection.

[0028] In addition, the device can also adjust the position and pressure of the detection electrode as needed to adapt to different cotton states and conveying speeds, further improving the flexibility and adaptability of detection. In general, the cotton regain online detection device provided by this embodiment provides an efficient, accurate, and real-time regain detection method for the cotton processing industry, and has broad application prospects.

[0029] Example 2 This embodiment provides an online detection method for cotton moisture regain, which is applied to an online detection device for cotton moisture regain as described in Example 1. The specific process is as follows: Firstly, the displacement pressure of the lower mechanical limit device is adjusted, and the detection pressure is indirectly set by adjusting the position of the compression position detection component and the size of the compression position indicator plate.

[0030] The start device starts to detect the moisture regain of cotton, and the cotton falls freely into the cotton flow channel 15. The cotton in the cotton flow channel 15 is compacted on the detection support platform 14 by its own weight and / or the traction force of the cotton feeding roller. The cotton exerts an extrusion force on the detection support platform 14. When the extrusion force of the cotton on the detection support platform 14 is greater than the set displacement pressure, the elastic displacement mechanism drives the switch mechanism to start to move away from the cotton flow channel 15. When the extrusion force of the cotton on the detection support platform 14 is greater than the set detection pressure, the elastic displacement mechanism drives the compression position indicator plate 13 to move to the compression position detection element. 12, the compression position detection component 12 starts to send a detection signal; the detection mechanism receives the detection signal, collects the resistance value signal between the two detection electrodes, and the microprocessor converts the collected resistance value signal into the cotton regain; when the squeezing force of the cotton on the detection support platform is less than the set detection pressure, the elastic displacement mechanism drives the switch mechanism to start displacing in the direction close to the cotton flow channel, that is, when the compression position indicator plate 13 is away from the sensing position of the compression position detection component 12, the compression position detection component 12 stops sending the detection signal, and the detection mechanism stops regain detection.

Claims

1. A cotton moisture regain online detection device, comprising: A mounting plate and a detection support platform, wherein the mounting plate is provided with a hollow portion, the detection support platform is installed on the hollow portion of the mounting plate, and a detection mechanism is provided on the detection support platform, characterized in that the detection support platform is slidably matched with the hollow portion of the mounting plate, an elastic displacement mechanism is provided on the outer side of the mounting plate, and the detection support platform is fixedly connected to the elastic displacement mechanism, and when the detection support platform is subjected to the squeezing force of the cotton, the elastic displacement mechanism is pressed to move away from the cotton flow channel, or the elastic displacement mechanism pushes the detection support platform to move toward the cotton flow channel; a switch mechanism is also provided, and when the elastic displacement mechanism reaches the set detection position, the detection mechanism starts detection.

2. The cotton moisture regain online detection device according to claim 1, characterized in that: The elastic displacement mechanism is arranged on an outer support plate fixedly connected to the mounting plate. The elastic displacement mechanism includes at least one elastic component and a guide component. One end of the guide component is fixed to the mounting plate and the other end is fixed to the outer support plate. The elastic component is sleeved on the guide component.

3. The cotton moisture regain online detection device according to claim 2, characterized in that: The end surface of the detection support platform outside the cotton flow channel is provided with a flange connection seat, and the flange base is provided with a plurality of mounting holes for the guide assembly to pass through, and the flange base is movably sleeved on the guide assembly.

4. The cotton moisture regain online detection device according to claim 3, characterized in that: The elastic component includes a mechanical elastic element, and positioning seats are provided at both ends of the mechanical elastic element. The guide component includes a guide rod and a guide rod support. The guide rod is assembled on the mounting plate and the outer support plate through the guide support. A linear bearing is also provided between the guide rod and the mounting hole of the flange connecting seat.

5. The cotton moisture regain online detection device according to claim 3, characterized in that: The elastic displacement mechanism also includes an upper mechanical limit device and a lower mechanical limit device, wherein one end of the upper mechanical limit device is fixedly connected to the outer support plate and the other end points to the flange base, and one end of the lower mechanical limit device is fixedly connected to the flange base and the other end points to the mounting plate.

6. The cotton moisture regain online detection device according to claim 5, characterized in that: The upper mechanical limit device and the lower mechanical limit device both use buffer rubber head screws.

7. The cotton moisture regain online detection device according to claim 3, characterized in that: The switch mechanism comprises a compression position detection component and a compression position indicating plate, wherein the compression position indicating plate is fixedly connected to the flange base, and the compression position detection component is fixedly connected to the outer support plate.

8. The cotton moisture regain online detection device according to claim 2, characterized in that: The detection mechanism is fixedly connected to the end surface of the detection support platform placed in the cotton flow channel.

9. The cotton moisture regain online detection device according to claim 1, characterized in that: It also includes a display, which is electrically connected to the detection mechanism; and a cover shell, which is fixedly connected to the outer side surface of the mounting plate.

10. A cotton moisture regain online detection method, applied to the cotton moisture regain online detection device as claimed in any one of claims 1 to 9, characterized in that: include: By adjusting the set displacement pressure of the lower mechanical limit device, the detection pressure is adjusted by adjusting the switch mechanism; the cotton enters the cotton flow channel, the cotton contacts the detection support platform and generates an extrusion pressure on the detection support platform, when the extrusion pressure of the cotton on the detection support platform is greater than the set displacement pressure, the elastic displacement mechanism drives the switch mechanism to start to displace in the direction away from the cotton flow channel; when the extrusion pressure of the cotton on the detection support platform is greater than the set detection pressure, the elastic displacement mechanism drives the switch mechanism to reach the set detection position, and the switch mechanism starts to send a detection signal; the detection mechanism receives the detection signal, collects the resistance value signal between the two detection electrodes, and converts the collected resistance value signal into the cotton regain; when the extrusion pressure of the cotton on the detection support platform is less than the set detection pressure, the elastic displacement mechanism drives the switch mechanism to start to displace in the direction close to the cotton flow channel, that is, the switch mechanism has not reached the detection position, the switch mechanism stops sending the detection signal, and the detection mechanism stops the regain detection.

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