An optimized needle-punching device for flipping geotextile and its construction process

Abstract

This invention discloses a geotextile flipping optimization needle punching device and its construction process. The device includes a first needle punching machine, a first feed roller connected to the input end of the first needle punching machine, a first edge conveying roller connected to the output end of the first needle punching machine, a second needle punching machine disposed on the output side of the first needle punching machine, a guide fabric assembly connected to the top of the second needle punching machine, a support frame disposed around the second needle punching machine and supporting the guide fabric assembly, a second feed roller connected to the input end of the second needle punching machine, and a second output roller connected to the output end of the second needle punching machine. This invention, through the arrangement of the guide fabric assembly, facilitates the flipping of the geotextile during movement, achieving needle punching on both sides while maintaining the needle punching direction; through the arrangement of the support frame, it facilitates the support of the guide fabric assembly and the protection of the top of the second needle punching machine; through the arrangement of the tensioning component, it facilitates the strengthening of the geotextile's tension between the two needle punching passes, ensuring that the elongation meets design requirements.

Description

Technical Field

[0001] This invention belongs to the field of geotextile preparation technology, and specifically relates to an optimized needle-punching device for flipping geotextile and its construction process. Background Technology

[0002] Geotextiles are a crucial component in the construction of roads, railways, bridges, and airport runways. Polypropylene filament geotextiles, in particular, require needle punching during their preparation to ensure their processing performance. In the needle punching process of polypropylene filament geotextiles, the general construction technique involves one pre-punching and one forward punching. If needle punching is required on both sides, three punching passes are needed. In this case, the fabric moves in a straight line, and the needles of the three punching machines are arranged in an up-down or down-up-down pattern. While the previous pre-punching and forward punching only punched one side, three punching passes not only require more space but also three punching machines, resulting in significant cost and space constraints. Furthermore, the tension and movement direction of the geotextile during the needle punching process are rarely addressed. Summary of the Invention

[0003] This invention provides an optimized needle punching device for flipping geotextile and its construction process, which solves technical problems such as geotextile flipping, forward and reverse needle punching under two needle punching machines, and stretching during the process.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A geotextile-optimized needle-punching device includes a first needle-punching machine, a first feed roller connected to the input end of the first needle-punching machine, a first edge-feeding roller connected to the output end of the first needle-punching machine, a second needle-punching machine disposed on the output side of the first needle-punching machine, a guide fabric assembly connected to the top of the second needle-punching machine, a support frame disposed around the second needle-punching machine and supporting the guide fabric assembly, a second feed roller connected to the input end of the second needle-punching machine, and a second output roller connected to the output end of the second needle-punching machine; the first edge-feeding roller of the first needle-punching machine and the second output roller of the second needle-punching machine are adjacent to each other, and the first feed roller, the first edge-feeding roller, the second output roller, and the second feed roller are distributed horizontally upwards in sequence.

[0006] The geotextile enters the first needle punching machine from the first feed roller, is output from the first edge conveying roller, then contacts the guide fabric assembly connected to the top of the second needle punching machine, then passes through the second feed roller into the second needle punching machine, and finally exits from the second output roller.

[0007] Furthermore, the first and second acupuncture machines are arranged horizontally upwards in a straight line, and the acupuncture directions of the first and second acupuncture machines are the same.

[0008] Furthermore, the first feed roller, the first edge conveying roller, the second feed roller, and the second output roller are all electrically controlled and connected to a control terminal. The rotational speeds of the first feed roller, the first edge conveying roller, and the second feed roller increase sequentially, with the increase being proportional. The rotational speed of the second feed roller is the same as that of the second output roller.

[0009] Furthermore, the guide cloth assembly is spaced apart on the top of the second needle punching machine, and the guide cloth assembly on the side near the second feed roller is flush with the side of the second needle punching machine.

[0010] The guide fabric assembly includes a guide fabric roller and guide fabric roller adjusting rods connected to both sides of the guide fabric roller. The guide fabric roller adjusting rods are detachably connected to the support frame and are automatic telescopic rods connected to the control terminal.

[0011] Furthermore, the tops of the spaced guide rollers are flush with each other, and the geotextile is in contact with the top of the guide rollers. The guide rollers are rotatably connected along the axis. The outer side of the second feed roller is flush with the outermost guide roller at the top of the second needle punch.

[0012] Furthermore, the support frame includes support columns arranged in a rectangular shape, support beams connected to the support columns, and support connecting beams spaced apart between two support beams; guide roller adjustment rods are detachably connected to the support beams; the support columns are spliced ​​columns and their height is set to correspond to the height of the guide rollers.

[0013] Furthermore, it also includes a stretching assembly disposed between the first needle punching machine and the second needle punching machine. The stretching assembly includes a pull rope base, a stretching bracket connected to the pull rope base, and a stretching roller detachably connected to the stretching bracket.

[0014] The geotextile passes through the first edge conveying roller and enters the stretching roller. After exiting the stretching roller, it is connected to the guide fabric assembly without flipping.

[0015] Furthermore, the rope base is equipped with casters and a braking device and a temporary fixing device; the tension rollers are arranged in at least an even number, and the geotextile is connected to the tension rollers in an S-shape or multiple S-shapes.

[0016] Furthermore, the construction process of the optimized needle-punching device for flipping geotextile is as follows:

[0017] Step 1: The geotextile, after being laid and sprayed, enters the first needle punching machine through the first feed roller, and after the first needle punching, it is output by the first edge conveying roller; wherein, the geotextile is a polypropylene filament geotextile.

[0018] Step 2: The speed of the first feeding roller and the first edge conveying roller is higher than the original speed of the geotextile, by one to two percent. The speed of the first feeding roller is one to two percent higher than the speed of the first edge conveying roller.

[0019] Step 3: The geotextile coming out of the first edge conveying roller is connected upward to the guide fabric assembly. The guide fabric assembly finely adjusts the height of the guide fabric rollers through the guide roller adjusting rod to make the top height of the guide fabric rollers consistent.

[0020] Step four: The guide fabric assembly from step three is detachably connected to the support frame. The installation of the guide fabric assembly employs hoisting and local fine-tuning. The support frame is arranged according to the height, length, and width of the second needle punching machine, with the support columns arranged and installed at their heights. Then, the support beams and connecting beams are assembled and installed, followed by hoisting the assembled guide fabric assembly. Each guide fabric assembly is positioned and adjusted individually until it meets the requirements.

[0021] Step 5: The geotextile self-guiding fabric assembly passes through the second needle punching machine from top to bottom, and then enters the second needle punching machine through the second feeding roller. The needle punching process of the geotextile is completed after the second needle punching.

[0022] The needles of the first and second needle-punching devices are the same square, and the needles are formed on both sides by the self-rotation of the geotextile.

[0023] Furthermore, the first and second needle punching machines are also equipped with a stretching assembly. The stretching assembly is moved by a universal wheel and fixed by a braking device and a temporary device. The geotextile is stretched by a stretching roller from the first edge conveying roller to the middle of the guide fabric assembly without flipping the surface. The stretching roller is arranged in an even number of relatively oblique directions, two oblique directions, four diamonds, or more than four even numbers of multi-diamonds.

[0024] The geotextile is stretched in an S-shape or multiple S-shapes within the tension rollers, and the stretching is achieved through an oblique arrangement without flipping the fabric surface. Furthermore, the construction process also includes a needle-punch density testing step, specifically:

[0025] Select the density detection area. The preset detection area is the area where the geotextile needle punching density needs to be guaranteed. Verify the overlap range between the effective areas of the density detection area and the preset detection area. Obtain the diagonal path connecting each endpoint of the preset detection area outline. Verify whether the outline of the density detection area intersects with the diagonal of the preset detection area.

[0026] The effective density detection area is determined and verified by randomly selecting a density detection area and verifying whether its outline intersects with the diagonal of a preset detection area. If at least one intersection point exists, the effective area overlap range verification condition is met, and the overlapping range is selected as the effective density detection area.

[0027] If the outline of the randomly selected density detection area does not intersect with the preset detection area, it is determined that the valid area overlap range verification condition is not met, and the density detection area is selected again.

[0028] Furthermore, the overlapping area is selected as the effective density detection region, and the density detection region is divided into grids. The number of grids is determined according to the minimum unit area requirement. Each grid is marked with a pattern corresponding to a matrix. For the measurement of the number and / or arrangement of high-density and low-density grids, the matrix corresponding to high-density grids is marked as "1", and the matrix corresponding to low-density grids is marked as "0". The grid-corresponding matrix can be expressed by the following general formula:

[0029] Where m represents the number of rows and n represents the number of columns.

[0030] The beneficial effects of this invention are reflected in:

[0031] 1) The present invention facilitates the flipping of geotextile during movement by setting the guide fabric assembly, thereby enabling needle punching on both sides without changing the needle punching direction of the needle punching machine. Moreover, the guide fabric assembly itself has no power and only serves to change the direction; in addition, the guide roller adjustment rod can be finely adjusted to ensure the requirements of the fabric laying are met.

[0032] 2) The present invention, through the setting of the support frame, helps to ensure the support of the guide cloth assembly and the top protection of the second needle punching machine, and the support column can adapt to different construction heights.

[0033] 3) The present invention, through the setting of the stretching component, helps to strengthen the stretching of the geotextile between the two needle punches, ensuring that the elongation meets the design requirements, and the arrangement of the stretching rollers and the pattern of the fabric ensure that the stretching and the fabric surface do not flip.

[0034] 4) The construction process of this invention further ensures the quality assurance of the finished geotextile by detecting the needle punch density. Combined with the optimized needle punching device construction, the density detection process reduces the detection area and improves detection efficiency by selecting a density detection area. At the same time, the diagonal intersection method is used to determine the effective density detection area, which ensures both the randomness and representativeness of the density detection area selection and the selection of an area with sufficient representative needle punch density for relevant density detection. Under the premise of ensuring the effectiveness of needle punch density detection, the calculation method is further optimized.

[0035] 5) The method of dividing the density detection area into grids and marking them with corresponding matrices can accurately measure the needle-punching density of geotextiles that meet various construction requirements. This allows the needle-punching density of geotextiles produced by the needle-punching device of this invention to be flexibly adapted to the construction requirements of relevant scenarios. Through needle-punching density detection, needle-punching faults of the needle-punching device can also be detected in time, and the machine's construction operation can be adjusted in a timely manner. At the same time, the relevant needle-punching density parameters ensure good air permeability and water permeability of the finished geotextile while also taking into account certain strength requirements.

[0036] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention; the main objects and other advantages of the invention may be realized and obtained by means of the embodiments particularly pointed out in the description. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the geotextile optimization needle punching device;

[0038] Figure 2 This is a partial schematic diagram of the structure of the geotextile optimization needle punching device;

[0039] Figure 3 It is a reverse geotextile optimized needle punching device with tensioning components;

[0040] Figure 4 This is a schematic diagram of the construction of the tension component;

[0041] Figure 5 This is a schematic diagram of needle penetration density detection in one embodiment of the present invention, wherein... Figure 5 a is a schematic diagram showing the conditions for satisfying the effective density detection area. Figure 5 b is a schematic diagram of the case where the effective density detection area is not met;

[0042] Figure 6 This is an example diagram illustrating the correspondence between grids and matrices in the needle penetration density detection method of one embodiment of the present invention.

[0043] Reference numerals in the attached drawings: 1-First needle punching machine, 2-First feeding roller, 3-First edge conveying roller, 4-Geotextile, 5-Guide assembly, 51-Guide roller, 52-Guide roller adjusting rod, 6-Adjusting support frame, 61-Adjusting support column, 62-Adjusting support beam, 63-Adjusting support connecting beam, 7-Second needle punching machine, 8-Second feeding roller, 9-Second output roller, 10-Tension assembly, 101-Pull rope base, 102-Tension bracket, 103-Tension roller. Detailed Implementation

[0044] Taking the needle-punching preparation of polypropylene filament geotextile as an example, to ensure that both sides of the geotextile are needle-punched without changing the needle-punching direction of the needle-punching machine, the needle-punching device is optimized by flipping the geotextile. For example... Figures 1 to 4 As shown, the geotextile reversing optimization needle punching device includes a first needle punching machine 1, a first feeding roller 2 connected to the input end of the first needle punching machine 1, a first edge conveying roller 3 connected to the output end of the first needle punching machine, a second needle punching machine 7 disposed on the output side of the first needle punching machine 1, a guide fabric assembly 5 connected to the top of the second needle punching machine 7, a support frame 6 disposed around the second needle punching machine 7 and supporting the guide fabric assembly 5, a second feeding roller 8 connected to the input end of the second needle punching machine 7, and a second output roller 9 connected to the output end of the second needle punching machine 7; the first edge conveying roller 3 of the first needle punching machine 1 and the second output roller 9 of the second needle punching machine 7 are adjacent to each other, and the first feeding roller 2, the first edge conveying roller 3, the second output roller 9 and the second feeding roller 8 are distributed horizontally upwards in sequence.

[0045] In one embodiment, the acupuncture density of the first acupuncture machine 1 is 145 / cm²; the acupuncture density of the second acupuncture machine 7 is 115 / cm²; the acupuncture frequency of the first acupuncture machine 1 is 2600 times / min; and the acupuncture frequency of the second acupuncture machine 7 is 1900 times / min. The needle-punching direction of both the first needle-punching machine 1 and the second needle-punching machine 7 is from top to bottom. The needle-punching density requirement ensures that the geotextile is suitable for the construction requirements of relevant scenarios, providing high-quality geotextile products. At the same time, the needle-punching density parameter requirements are closely related to air permeability and water permeability. However, if the needle-punching density is inappropriate, it will affect the strength of the geotextile. The needle-punching density of this embodiment ensures good air permeability and water permeability of the geotextile product while also taking into account certain strength requirements. The restrictions on the needle-punching density and needle-punching frequency of the first needle-punching machine 1 and the needle-punching frequency parameters of the second needle-punching machine are only preferred in this embodiment and can be adjusted according to construction requirements. For example, the needle-punching density of the first needle-punching machine 1 is 145 / cm2, which can fluctuate around 20%. The parameters selected here are only for optimal parameter examples and are not limited to this. Here, " / cm2" means "per square centimeter".

[0046] In one embodiment, the geotextile 4 enters the first needle punching machine 1 from the first feed roller 2, is output from the first edge conveying roller 3, then contacts the guide fabric assembly 5 connected to the top of the second needle punching machine 7, then passes through the second feed roller 8 into the second needle punching machine 7 and then exits from the second output roller 9.

[0047] In this embodiment, the first needle-punching machine 1 and the second needle-punching machine 7 are arranged horizontally upwards in a straight line, and the needle-punching directions of the first needle-punching machine 1 and the second needle-punching machine 7 are the same. The first feed roller 2, the first edge-feeding roller 3, the second feed roller 8, and the second output roller 9 are all electrically controlled and connected to a control terminal. The rotational speeds of the first feed roller 2, the first edge-feeding roller 3, and the second feed roller 8 increase sequentially, with the increase being proportional. The rotational speed of the second feed roller 8 is the same as the rotational speed of the second output roller 9.

[0048] The geotextile 4 enters the needle punching machine at a speed of 6 m / min, the first feed roller 2 rotates at 6.06 m / min, the first edge conveying roller 3 rotates at 6.12 m / min, and the second feed roller 8 and the second output roller 9 both rotate at 6.24 m / min. Here, "m / min" represents meters per minute.

[0049] In this embodiment, the guide cloth assembly 5 is spaced apart on the top of the second needle punching machine 7, and the guide cloth assembly 5 on the side adjacent to the second feed roller 8 is flush with the side of the second needle punching machine 7; the guide cloth assembly 5 includes a guide cloth roller 51 and a guide roller adjusting rod 52 connected to both sides of the guide cloth roller 51. The bottom of the guide roller adjusting rod 52 is threaded or clamped to the support frame 6. The guide roller adjusting rod 52 is an automatic telescopic rod and is connected to the control terminal.

[0050] In this embodiment, the top of the spaced guide rollers 51 is flush with the top, the geotextile 4 is in contact with the top of the guide rollers 51, and the guide rollers 51 are rotatably connected along the axis; the outer side of the second feed roller 8 is flush with the outermost guide roller 51 at the top of the second needle punch 7.

[0051] In this embodiment, the support frame 6 includes rectangularly distributed support columns 61, support beams 62 connected to the support columns 61, and support connecting beams 63 spaced apart between two support beams 62; guide roller adjustment rods 52 are detachably connected to the support beams 62; the support columns 61 are spliced ​​columns and their height corresponds to the height of the guide rollers 51. The support columns 61, support beams 62, and support connecting beams 63 are all made of steel.

[0052] In this embodiment, a stretching assembly 10 is also included. The stretching assembly 10 is disposed between the first needle punching machine 1 and the second needle punching machine 7. The stretching assembly 10 includes a rope base 101, a stretching bracket 102 connected to the rope base 101, and a stretching roller 103 detachably connected to the stretching bracket 102. The geotextile 4 passes through the first edge conveying roller 3 and enters the stretching roller 103. After exiting the stretching roller 103, it is connected to the guide fabric assembly 5 without flipping.

[0053] In this embodiment, the rope base 101 is equipped with casters and a braking device and a temporary fixing device; the tension rollers 103 are arranged in at least an even number, and the geotextile 4 is connected to the tension rollers 103 in an S-shape or multiple S-shapes. The rotational speed of the tension roller is the same as that of the first edge conveying roller 3, which is 6.12 m / min.

[0054] Combination Figures 1 to 4 As shown, the construction process of the geotextile-optimized needle-punching device is further explained. In one embodiment, the specific steps are as follows:

[0055] Step 1: The geotextile 4, after being laid and sprayed, enters the first needle punching machine 1 through the first feed roller 2. After the first needle punching, it is output by the first edge conveying roller 3. The geotextile 4 is a polypropylene filament geotextile 4.

[0056] Step 2: The speeds of the first feeding roller 2 and the first edge conveying roller 3 are higher than the original speed of the geotextile 4, by one to two percent. Specifically, the speed of the first feeding roller 2 is one to two percent higher than the speed of the first edge conveying roller 3. The initial speed of the geotextile 4 before entering the needle punching machine is 6 m / min, the rotational speed of the first feeding roller 2 is 6.06 m / min, and the rotational speed of the first edge conveying roller 3 is 6.12 m / min.

[0057] Step 3: The geotextile 4 coming out of the first conveyor roller 3 is connected upward to the guide fabric assembly 5. The guide fabric assembly 5 finely adjusts the height of the guide fabric roller 51 through the guide roller adjusting rod 52 to make the top height of the guide fabric roller consistent.

[0058] Step four: The guide fabric assembly 5 from step three is detachably connected to the support frame 6. The installation of the guide fabric assembly 5 adopts a hoisting and local fine-tuning method. The support frame 6 is arranged according to the height, length, and width of the second needle punching machine 7, and the height of the support columns 61 is assembled and installed. Then, the support beam 62 and the support connecting beam 63 are assembled and installed, and then the assembled guide fabric assembly 5 is hoisted. In this process, each guide fabric assembly 5 is positioned and adjusted one by one until it meets the requirements.

[0059] In addition, the first acupuncture machine 1 and the second acupuncture machine 7 are also provided with a tensioning assembly 10, which is moved by a universal wheel and fixed by a braking device and a temporary device.

[0060] The geotextile 4 is stretched by the tension roller 103 from the first edge conveyor roller 3 to the guide fabric assembly 5 without flipping the surface; wherein the tension roller 103 is arranged in an even number of opposite diagonal directions, two diagonal directions, four diamond directions, or more than four even numbers of diamond directions; the geotextile 4 is in an S-shape or multiple S-shape in the tension roller 103, and is stretched by the diagonal arrangement without flipping the fabric surface.

[0061] Step 5: The geotextile 4 self-guiding fabric assembly 5 passes through the second needle punching machine 7 from top to bottom, and then enters the second needle punching machine 7 through the second feed roller 8. After the second needle punching, the needle punching process of the geotextile 4 is completed; wherein, the rotational speed of the second feed roller 8 and the rotational speed of the second output roller 9 are both 6.24 m / min.

[0062] The needles of the first and second needles are the same square, and the geotextile 4 is rotated to form needles on both sides.

[0063] Furthermore, the process includes a needle-punch density detection step, specifically: selecting a density detection area (the preset detection area is the area where the needle-punch density of the geotextile needs to be guaranteed); verifying the effective overlap range between the density detection area and the preset detection area; obtaining the diagonal paths connecting the endpoints of the preset detection area outline; verifying whether the outline of the density detection area intersects with the diagonal of the preset detection area; and verifying the effective overlap range by randomly selecting a density detection area and verifying whether its outline intersects with the diagonal of the preset detection area. If at least one intersection point exists, the effective overlap range verification condition is met, and the overlapping area is selected as the effective density detection area.

[0064] If the outline of a randomly selected density detection area does not intersect with the preset detection area, it is determined that the valid area overlap range verification condition is not met, and the density detection area is reselected. In the relevant steps of adding needle density detection, by selecting a density detection area, the area range of density detection is reduced, and the detection efficiency is improved. At the same time, the diagonal intersection method is used to determine the valid density detection area, which ensures both the randomness and representativeness of the density detection area selection and ensures that the area with sufficient representative needle density is selected for relevant density detection. Under the premise of ensuring the effectiveness of needle density detection, the calculation method is further optimized. Needle density is closely related to the permeability, air permeability and strength of geotextile, so density detection is necessary. Moreover, it can detect in a timely manner the insufficient needle density caused by needle punching device failure during the production process.

[0065] refer to Figure 5 In the central area of ​​geotextile 4, a preset testing area Q and a density testing area R are selected. The diagonal lines connecting the preset testing area Q include CD and EF. At this time, the preset testing area Q is the central area. The central area of ​​the geotextile is a key area with high requirements for stress strength and needle punching density. Figure 5 In case a, the diagonal lines CD and EF connecting the density detection region R and the preset detection region Q intersect. The area overlapping the density detection region R and the preset detection region Q is the effective density detection region. Figure 5In case b, the diagonal lines CD and EF connecting the density detection region R and the preset detection region Q do not intersect, and there is no intersection point. Although there is some overlap between the density detection region R and the preset detection region Q, the overlap area is too small to guarantee the accuracy and representativeness of the sample needle prick density detection. Therefore, it is necessary to reselect the density detection region. In other words, the method of using the diagonal intersection point to determine the effective density detection region ensures that the density detection region overlaps with the preset detection region and provides a sufficiently representative effective density detection region for detection, thus ensuring the effectiveness and representativeness of the density detection.

[0066] The overlapping area is selected as the effective density detection region. The density detection region is then divided into grids. The number of grids is determined based on the minimum unit area requirement. Each grid is marked with a matrix corresponding to a pattern. The number and / or arrangement of high-density and low-density grids are measured. The matrix corresponding to high-density grids is marked as "1", and the matrix corresponding to low-density grids is marked as "0". The grid-corresponding matrix can be expressed by the following general formula:

[0067] Where m represents the number of rows and n represents the number of columns, in a preferred embodiment, the number of grids should be such that each grid is no more than 1 square centimeter. The density parameters of each grid are measured and collected. The proportion of high-density grid units in the entire grid matrix can be set to be greater than or equal to 50%, or the arrangement of high-density grid units in the entire grid can be set so that the data detection results obtained through density measurement meet the strength requirements of geotextile. Using the grid division and matrix marking pattern, the measurement procedure is simplified to a certain extent while ensuring the accuracy of density measurement, and the accuracy and efficiency of detection are improved.

[0068] like Figure 6 As shown in the example, if the effective density detection area is selected as 16 square centimeters, then a 16-grid effective density detection area can be obtained by dividing it into 1 square centimeter grids. Here, X represents the dark area as a high-density grid cell, and Y represents the light area as a low-density grid cell. In this embodiment, the required conditions are that high-density and low-density cells are arranged alternately in rows and columns, and the number of high-density cells should account for more than or equal to 50% of the entire grid matrix. The corresponding quaternion matrix corresponds to the divided grid in a matrix manner, where matrix "1" represents high-density grid detection and matrix "0" represents low-density grid detection. As long as the quaternion matrix satisfies that each row and each column has at least two high-density cells arranged alternately, and the number of high-density cells accounts for more than or equal to 50% of the entire grid matrix, it is acceptable. Figure 6 In the case shown, the corresponding matrix expression is:

[0069] The "1" representing high-density grids and the "0" representing low-density grids are arranged alternately, with "1" occupying 8 grids. This satisfies the condition that the proportion of high-density units in the entire grid matrix should be greater than or equal to 50%, which meets the set requirements for geotextile needle punching density. In addition, as a further preferred embodiment, if the condition is set to alternate between high-density and low-density units in each row, then when the matrix detects A = [1 01], the detection of the first row can be stopped. Since the arrangement and density ratio of high-density units in the column are not required, the first row A14 has met the requirements regardless of whether it is "1" or "0", and the detection of other rows can be carried out. Ultimately, this further saves computing power.

[0070] Those skilled in the art will recognize that the method steps described in conjunction with the embodiments disclosed herein involve algorithmic processing and can be implemented using electronic hardware, computer software, or a combination of both. Examples include image detection using a camera, and the use of computer equipment for grid division of the detection area, calculation of the corresponding matrix, and statistical analysis. To clearly illustrate the interchangeability of hardware and software, the steps and components of each embodiment have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the invention. The methods or steps described in conjunction with the embodiments disclosed herein can be implemented using hardware, a software program executed by a processor, or a combination of both. Software programs can be stored in storage media such as Random Access Memory (RAM), main memory, Read-Only Memory (ROM), Electrically Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), registers, hard disks, and removable disks.

[0071] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A construction process for an optimized needle-punching device for flipping geotextile, characterized in that, The geotextile optimization needle punching device includes a first needle punching machine (1), a first feeding roller (2) connected to the input end of the first needle punching machine (1), a first edge conveying roller (3) connected to the output end of the first needle punching machine, a second needle punching machine (7) set on the output side of the first needle punching machine (1), a guide fabric assembly (5) connected to the top of the second needle punching machine (7), a support frame (6) set around the second needle punching machine (7) and supporting the guide fabric assembly (5), a second feeding roller (8) connected to the input end of the second needle punching machine (7), and a second output roller (9) connected to the output end of the second needle punching machine (7); the first edge conveying roller (3) of the first needle punching machine (1) and the second output roller (9) of the second needle punching machine (7) are adjacent to each other, and the first feeding roller (2), the first edge conveying roller (3), the second output roller (9) and the second feeding roller (8) are distributed horizontally upward in sequence; Geotextile (4) enters the first needle punching machine (1) through the first feed roller (2), is output through the first edge conveying roller (3), then contacts the guide assembly (5) connected to the top of the second needle punching machine (7), then passes through the second feed roller (8) into the second needle punching machine (7), and finally exits through the second output roller (9). The needle-punching density of the first needle-punching machine is 145 / cm²; the needle-punching density of the second needle-punching machine is 115 / cm²; the needle-punching frequency of the first needle-punching machine is 2600 times / min; the needle-punching frequency of the second needle-punching machine is 1900 times / min; the needle-punching direction of the first and second needle-punching machines is from top to bottom; the speed of the geotextile before entering the needle-punching machine is 6m / min; the rotation speed of the first feed roller is 6.06m / min; the rotation speed of the first edge conveying roller is 6.12m / min; the rotation speed of the second feed roller and the rotation speed of the second output roller are both 6.24m / min; the geotextile (4) is stretched by the tension roller (103) from the first edge conveying roller (3) to the guide assembly (5) without flipping the surface; the tension roller (103) is arranged in an even number of relatively oblique directions, two oblique directions, four diamonds, or more than four even numbers of diamonds. The geotextile (4) is formed into an S-shape or multiple S-shapes in the stretching rollers (103), and is stretched by an oblique arrangement without flipping the fabric surface. The construction process includes a needle penetration density testing step, specifically: Select the density testing area. The preset testing area is the area where the geotextile needle punching density needs to be guaranteed. Verify the effective overlap between the density testing area and the preset testing area. Verify the overlap range between the density detection region and the effective region of the preset detection region, obtain the diagonal path connecting each endpoint of the preset detection region contour, and verify whether the contour of the density detection region intersects with the diagonal of the preset detection region. The effective density detection area is determined and verified by randomly selecting a density detection area and verifying whether its outline intersects with the diagonal of a preset detection area. If at least one intersection point exists, it is determined that the effective area overlap range verification condition is met, and the overlapping range is selected as the effective density detection area. If the outline of the randomly selected density detection area does not intersect with the preset detection area, it is determined that it does not meet the valid area overlap range verification condition, and the density detection area is selected again. The conditions for meeting the requirements are as follows: high-density cells and low-density cells are arranged in alternating rows and columns, and the number of high-density cells accounts for more than or equal to 50% of the total grid matrix. The overlapping area is selected as the effective density detection region, and the effective density detection region is divided into grids. The number of grids is determined according to the minimum cell area requirement. Each grid is marked with a pattern corresponding to the matrix. The number and / or arrangement of high-density and low-density grids are measured. The matrix corresponding to high-density grids is marked as "1", and the matrix corresponding to low-density grids is marked as "0". The grid-corresponding matrix can be expressed by the following general formula: Where m represents the number of rows and n represents the number of columns.

2. The construction process of the geotextile-optimized needle-punching device as described in claim 1, characterized in that, The first acupuncture machine (1) and the second acupuncture machine (7) are arranged horizontally upward in a straight line, and the acupuncture directions of the first acupuncture machine (1) and the second acupuncture machine (7) are the same.

3. The construction process of the geotextile-optimized needle-punching device as described in claim 1, characterized in that, The first feed roller (2), the first edge conveying roller (3), the second feed roller (8), and the second output roller (9) are all electrically controlled and connected to the control terminal. The rotation speeds of the first feed roller (2), the first edge conveying roller (3), and the second feed roller (8) increase sequentially, with the increase being proportional. The rotation speed of the second feed roller (8) is the same as that of the second output roller (9).

4. The construction process of the geotextile-optimized needle-punching device as described in claim 1, characterized in that, The guide cloth assembly (5) is spaced apart on the top of the second needle punch (7), and the guide cloth assembly (5) on the side adjacent to the second feed roller (8) is flush with the side of the second needle punch (7); The guide fabric assembly (5) includes a guide fabric roller (51) and guide fabric roller adjusting rods (52) connected to both sides of the guide fabric roller (51). The guide fabric roller adjusting rods (52) are detachably connected to the support frame (6) and are automatic telescopic rods connected to the control terminal.

5. The construction process of the geotextile-optimized needle-punching device as described in claim 4, characterized in that, The top of the spaced guide rollers (51) is flush with the top of the geotextile (4), and the geotextile (4) is in contact with the top of the guide rollers (51). The guide rollers (51) are rotatably connected along the axis. The outer side of the second feed roller (8) is flush with the outermost guide roller (51) at the top of the second needle punch (7).

6. The construction process of the geotextile-optimized needle-punching device as described in claim 5, characterized in that, The adjustment frame (6) includes adjustment columns (61) arranged in a rectangle, adjustment beams (62) connected to the adjustment columns (61), and adjustment connecting beams (63) connected between the two adjustment beams (62) and spaced apart; guide roller adjustment rods (52) are detachably connected to the adjustment beams (62); the adjustment columns (61) are spliced ​​columns and their height is set to correspond to the height of the guide rollers (51).

7. The construction process of the geotextile-optimized needle-punching device as described in claim 1, characterized in that, It also includes a stretching assembly (10), which is disposed between the first needle punching machine (1) and the second needle punching machine (7). The stretching assembly (10) includes a draw rope base (101), a stretching bracket (102) connected to the draw rope base (101), and a stretching roller (103) detachably connected to the stretching bracket (102). The geotextile (4) passes through the first feed roller (3) and enters the tension roller (103). After exiting the tension roller (103), it is connected to the guide fabric assembly (5) without flipping. The pull rope base (101) is equipped with universal wheels and a braking device and a temporary fixing device. The tension rollers (103) are arranged in at least an even number, and the geotextile (4) is connected to the tension rollers (103) in an S-shape or multiple S-shapes.

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