A high-pressure spray adaptive multi-stage screening system

Abstract

The present invention belongs to the technical field of shield slag treatment, and in particular, relates to a high-pressure spraying adaptive multi-stage screening system, comprising: a support frame; a primary screening system, arranged above the support frame; a secondary screening system, arranged on the support frame, and connected to the lower part of the primary screening system; a high-pressure spraying system, used to clean the shield slag during the screening process; a visual intelligent recognition system, used to determine the proportional relationship of sand and gravel in different particle size ranges obtained after screening; a control system, electrically connected to the visual intelligent recognition system and the high-pressure spraying system, used to adjust the spraying pressure of the high-pressure spraying system according to the proportional relationship of sand and gravel in different particle size ranges. The present invention adjusts the spraying pressure of each screening level of the high-pressure spraying system through the control system to maintain a higher screening capacity and lower water consumption. Compared with the traditional manual adjustment method, the automatic adjustment can save manpower and reduce the use cost.

Description

Technical Field

[0001] The invention belongs to the technical field of shield slag treatment, and in particular relates to a high-pressure spraying adaptive multi-stage screening system. Background Art

[0002] At present, shield construction is widely used in the construction of subways, roads and other tunnel projects in China. Shield machines will produce a large amount of shield slag during the excavation process. Shield slag not only contains a large amount of usable resources, but also improperly handled shield slag will pollute the urban environment. Since the strata that shield machines pass through are often complex, the composition of shield slag is complex, so some construction sites use multi-stage vibration screening to treat shield slag.

[0003] In the prior art, shield slag is graded by vibrating screening, and a gradual high-pressure spraying device is set up to eliminate mud blocks and reduce the mud content of sand and gravel during the shield slag treatment process. Since the composition of shield slag changes during the shield machine excavation process, and the pressure of the spraying water during the operation of the traditional high-pressure spraying device needs to be manually adjusted to adapt to different work intensities, it not only affects the screening efficiency and treatment effect, but also increases the work intensity of the workers. Summary of the invention

[0004] The purpose of the present invention is to provide a high-pressure spray adaptive multi-stage screening system to solve the above problems.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A high-pressure spray adaptive multi-stage screening system, comprising:

[0007] Support frame;

[0008] A primary screening system is arranged above the support frame;

[0009] A secondary screening system is arranged on the support frame and is connected to and arranged below the primary screening system;

[0010] High-pressure spray system, used to clean shield slag during screening process;

[0011] Visual intelligent recognition system, used to determine the proportion of sand and gravel with different particle size ranges obtained after screening;

[0012] The control system is electrically connected to the visual intelligent recognition system and the high-pressure spraying system, and is used to adjust the spraying pressure of the high-pressure spraying system according to the proportion of sand and gravel in different particle size ranges.

[0013] Preferably, the primary screening system comprises a primary screening box, the primary screening box is fixed on the supporting frame, and a feed inlet is provided on one side of the top of the primary screening box;

[0014] The first-stage screening box is provided with a first-stage excitation part;

[0015] The first screen and the second screen are fixedly connected in sequence from top to bottom in the primary screening box, the first screen and the second screen are arranged obliquely, the high ends of the first screen and the second screen are arranged close to the feed port, and the diameter of the first screen hole is larger than the diameter of the second screen hole;

[0016] The bottom discharge end of the first-level screening box is connected to the feed end of the second-level screening system;

[0017] The discharge end of the first screen is connected to the feed end of the first chute;

[0018] The discharge end of the second screen is connected to the feed end of the second chute.

[0019] Preferably, the secondary screening system comprises a secondary screening box, and the top feed end of the secondary screening box is connected to the bottom discharge end of the primary screening box;

[0020] The secondary screening box is fixed with a third screen and a fourth screen in sequence from top to bottom, the third screen and the fourth screen are arranged obliquely, the high ends of the third screen and the fourth screen are arranged close to the feed port, the diameter of the third screen hole is larger than the diameter of the fourth screen hole, and the diameter of the third screen hole is smaller than the diameter of the second screen hole;

[0021] The discharge end at the bottom of the secondary screening box is connected to the feed end of the under-screen chute;

[0022] The secondary screening box is provided with a secondary excitation part;

[0023] The discharge end of the third screen is connected to the feed end of the third chute;

[0024] The discharge end of the fourth screen is connected with the feed end of the fourth chute.

[0025] Preferably, the primary excitation unit includes a first excitation motor, and the first excitation motor is fixedly connected to the inner wall of the primary screening box.

[0026] Preferably, the secondary excitation unit includes a second excitation motor, and the second excitation motor is fixed to the inner wall of the secondary screening box.

[0027] Preferably, the high-pressure spray system comprises a first high-pressure spray pipeline, a second high-pressure spray pipeline, a third high-pressure spray pipeline and a fourth high-pressure spray pipeline, and the first high-pressure spray pipeline and the second high-pressure spray pipeline are connected to the interior of the primary screening box;

[0028] The liquid outlet end of the first high-pressure spray pipeline is located above the first screen;

[0029] The liquid outlet end of the second high-pressure spray pipeline is located above the second screen;

[0030] The third high-pressure spray pipeline and the fourth high-pressure spray pipeline are in communication with the interior of the secondary screening box;

[0031] The liquid outlet end of the third high-pressure spray pipeline is located above the third screen;

[0032] The liquid outlet end of the fourth high-pressure spray pipeline is located above the fourth screen;

[0033] The first high-pressure spray pipeline, the second high-pressure spray pipeline, the third high-pressure spray pipeline and the fourth high-pressure spray pipeline have the same structure.

[0034] Preferably, the first high-pressure spray pipeline comprises a water inlet pipe, a high-pressure water pump, a spray pipe and a plurality of high-pressure fan-shaped spray nozzles which are connected in sequence;

[0035] The high-pressure water pump is electrically connected to a receiver and a frequency converter, and the receiver is electrically connected to the control system;

[0036] The plurality of high-pressure fan-shaped nozzles of the first high-pressure spray pipeline are located above the first screen;

[0037] The plurality of high-pressure fan-shaped nozzles of the second high-pressure spray pipeline are located above the second screen;

[0038] The plurality of high-pressure fan-shaped nozzles of the third high-pressure spray pipeline are located above the third screen;

[0039] The plurality of high-pressure fan-shaped nozzles of the fourth high-pressure spray pipeline are located above the fourth screen.

[0040] Preferably, the visual intelligent recognition system comprises a first image recognition component, a second image recognition component, a third image recognition component and a fourth image recognition component, wherein the first image recognition component is fixedly connected to the first chute, the second image recognition component is fixedly connected to the second chute, the third image recognition component is fixedly connected to the third chute, and the fourth image recognition component is fixedly connected to the fourth chute;

[0041] The first image recognition component, the second image recognition component, the third image recognition component and the fourth image recognition component are electrically connected to the control system.

[0042] Preferably, the first screen and the second screen are rectangular hole screens.

[0043] Preferably, the third screen and the fourth screen are diamond-shaped anti-blocking screens.

[0044] Compared with the prior art, the present invention has the following advantages and technical effects:

[0045] When in use, the shield slag is put into the feeding end of the primary screening system, and the primary screening is carried out by the primary screening system, and the secondary screening is carried out by the secondary screening system. During the screening process, the shield slag is cleaned by the high-pressure spray system, and the mud on the surface of the shield slag is washed away to form sand and gravel slag with different particle size ranges for discharge. The proportional relationship of sand and gravel with different particle size ranges obtained after screening is determined by the visual intelligent recognition system, and fed back to the control system. The spraying pressure of each screening level of the high-pressure spray system is adjusted by the control system to maintain a high screening capacity and low water consumption. Compared with the traditional manual adjustment method, automatic adjustment can save manpower and reduce the use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0047] Figure 1 It is a schematic diagram of the structure of the present invention;

[0048] Figure 2 This is a schematic diagram of the high-pressure spray pipeline structure of the present invention;

[0049] Figure 3 This is a schematic diagram of the rectangular hole screen structure of the present invention;

[0050] Figure 4 This is a schematic diagram of the structure of the diamond-shaped anti-blocking screen of the present invention;

[0051] Figure 5 Flow chart for implementing the present invention;

[0052] Among them, 1. support frame; 2. primary screening box; 3. secondary screening box; 4. first screen; 5. second screen; 6. third screen; 7. fourth screen; 8. first excitation motor; 9. second excitation motor; 10. under-screen chute; 11. feed port; 12. first chute; 13. second chute; 14. third chute; 15. fourth chute; 16. first image recognition component; 17. second image recognition component; 18. third image recognition component; 19. fourth image recognition component; 20. first high-pressure spray pipeline; 21. second high-pressure spray pipeline; 22. third high-pressure spray pipeline; 23. fourth high-pressure spray pipeline; 24. water inlet pipe; 25. high-pressure water pump; 26. receiver; 27. frequency converter; 28. spray pipe; 29. ​​high-pressure fan-shaped nozzle. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] Reference Figures 1 to 5 The present invention discloses a high-pressure spray adaptive multi-stage screening system, comprising:

[0056] Support frame 1;

[0057] A primary screening system is arranged above the support frame 1;

[0058] The secondary screening system is arranged on the support frame 1 and is connected to the lower part of the primary screening system;

[0059] High-pressure spray system, used to clean shield slag during screening process;

[0060] Visual intelligent recognition system, used to determine the proportion of sand and gravel with different particle size ranges obtained after screening;

[0061] The control system is electrically connected to the visual intelligent recognition system and the high-pressure spraying system, and is used to adjust the spraying pressure of the high-pressure spraying system according to the proportional relationship of sand and gravel in different particle size ranges.

[0062] When in use, the shield slag is put into the feeding end of the primary screening system, and the primary screening is carried out by the primary screening system, and the secondary screening is carried out by the secondary screening system. During the screening process, the shield slag is cleaned by the high-pressure spray system, and the mud on the surface of the shield slag is washed away to form sand and gravel slag with different particle size ranges for discharge. The proportional relationship of sand and gravel with different particle size ranges obtained after screening is determined by the visual intelligent recognition system, and fed back to the control system. The spraying pressure of each screening level of the high-pressure spray system is adjusted by the control system to maintain a high screening capacity and low water consumption. Compared with the traditional manual adjustment method, automatic adjustment can save manpower and reduce the use cost.

[0063] According to a further optimization scheme, the primary screening system includes a primary screening box 2, which is fixed on the support frame 1, and a feed inlet 11 is provided on one side of the top of the primary screening box 2;

[0064] A first-stage exciting part is provided in the first-stage screening box 2;

[0065] The first screen 4 and the second screen 5 are fixedly connected in sequence from top to bottom in the primary screening box 2. The first screen 4 and the second screen 5 are arranged obliquely. The high ends of the first screen 4 and the second screen 5 are arranged close to the feed port 11. The diameter of the first screen 4 is larger than that of the second screen 5.

[0066] The bottom discharge end of the first-stage screening box 2 is connected to the feed end of the second-stage screening system;

[0067] The discharge end of the first screen 4 is connected to the feed end of the first chute 12;

[0068] The discharge end of the second screen 5 is connected to the feed end of the second chute 13 .

[0069] Further optimizing the scheme, the secondary screening system includes a secondary screening box 3, the top feed end of the secondary screening box 3 is connected to the bottom discharge end of the primary screening box 2;

[0070] The third screen 6 and the fourth screen 7 are fixedly connected in sequence from top to bottom in the secondary screening box 3. The third screen 6 and the fourth screen 7 are arranged obliquely. The high ends of the third screen 6 and the fourth screen 7 are arranged close to the feed port 11. The diameter of the sieve hole of the third screen 6 is larger than that of the sieve hole of the fourth screen 7. The diameter of the sieve hole of the third screen 6 is smaller than that of the sieve hole of the second screen 5.

[0071] The bottom discharge end of the secondary screening box 3 is connected to the feed end of the under-screen chute 10;

[0072] A secondary excitation unit is provided in the secondary screening box 3;

[0073] The discharge end of the third screen 6 is connected to the feed end of the third chute 14;

[0074] The discharge end of the fourth screen 7 is connected to the feed end of the fourth chute 15 .

[0075] According to a further optimized solution, the first-stage excitation part includes a first excitation motor 8 , and the first excitation motor 8 is fixedly connected to the inner wall of the first-stage screening box 2 .

[0076] According to a further optimized solution, the secondary excitation part includes a second excitation motor 9 , and the second excitation motor 9 is fixedly connected to the inner wall of the secondary screening box 3 .

[0077] The primary screening box 2, the secondary screening box 3 and the under-screen chute 10 are fixedly connected to the support frame 1 by bolts, the bottom of the primary screening box 2 is connected to the top of the secondary screening box 3, and the bottom of the secondary screening box 3 is connected to the top of the under-screen chute 10.

[0078] The first-stage screening box 2 includes a feed port 11, a first excitation motor 8, a first screen 4, a second screen 5, a first chute 12, and a second chute 13. The inner sand and gravel particle size of the first screen 4 is larger than the inner sand and gravel particle size of the second screen 5. The first screen 4 and the second screen 5 are both rectangular hole screens and are both placed at an angle. The feed port 11 is located above the higher side of the first screen 4 and is used to receive shield slag.

[0079] The secondary screening box 3 includes a feed port 11, a second excitation motor 9, a third screen 6, a fourth screen 7, a third chute 14, and a fourth chute 15. The sand and gravel particle size of the third screen 6 is smaller than that of the second screen 5, and the sand and gravel particle size of the fourth screen 7 is smaller than that of the third screen 6. The third screen 6 and the fourth screen 7 are both diamond-shaped anti-blocking screens and are both placed at an angle. The under-screen chute 10 is located below the fourth screen 7.

[0080] After the first excitation motor 8 is started, it will drive the primary screening box 2 to vibrate and drive the first screen 4 and the second screen 5 to vibrate. The first screen 4 and the second screen 5 are respectively provided with a first chute 12 and a second chute 13 on the lower side for collecting the screening products of the first screen 4 and the second screen 5. After the second excitation motor 9 is started, it will drive the secondary screening box 3 to vibrate and drive the third screen 6 and the fourth screen 7 to vibrate. The third screen 6 and the fourth screen 7 are respectively provided with a third chute 14 and a fourth chute 15 on the lower side for collecting the screening products of the third screen 6 and the fourth screen 7. The inclination angle of each screen is consistent. The lower net of the lower layer will re-screen the screened material of the upper screen. Finally, the fourth screen 7 completes the final screening to obtain 2-4.75mm fine aggregate and sand washing slurry. The 2-4.75mm fine aggregate is collected by the fourth chute 15, and the sand washing slurry enters the screen chute 10 for collection.

[0081] Furthermore, the apertures of the first sieve 4 and the second sieve 5 are 12 mm and 8 mm respectively;

[0082] Furthermore, the apertures of the third sieve 6 and the fourth sieve 7 are 4.75 mm and 2 mm respectively.

[0083] Further optimizing the scheme, the high-pressure spray system includes a first high-pressure spray pipeline 20, a second high-pressure spray pipeline 21, a third high-pressure spray pipeline 22 and a fourth high-pressure spray pipeline 23, and the first high-pressure spray pipeline 20 and the second high-pressure spray pipeline 21 are connected to the inside of the primary screening box 2;

[0084] The liquid outlet end of the first high-pressure spray pipeline 20 is located above the first screen 4;

[0085] The liquid outlet end of the second high-pressure spray pipeline 21 is located above the second screen 5;

[0086] The third high-pressure spray pipeline 22 and the fourth high-pressure spray pipeline 23 are connected to the inside of the secondary screening box 3;

[0087] The liquid outlet end of the third high-pressure spray pipeline 22 is located above the third screen 6;

[0088] The liquid outlet end of the fourth high-pressure spray pipeline 23 is located above the fourth screen 7;

[0089] The first high-pressure spray pipeline 20 , the second high-pressure spray pipeline 21 , the third high-pressure spray pipeline 22 and the fourth high-pressure spray pipeline 23 have the same structure.

[0090] According to a further optimized solution, the first high-pressure spray pipeline 20 includes a water inlet pipe 24, a high-pressure water pump 25, a spray pipe 28 and a plurality of high-pressure fan-shaped nozzles 29 which are sequentially connected.

[0091] The high-pressure water pump 25 is electrically connected to a receiver 26 and a frequency converter 27, and the receiver 26 is electrically connected to a control system;

[0092] A plurality of high-pressure fan-shaped spray nozzles 29 of the first high-pressure spray pipeline 20 are located above the first screen 4;

[0093] A plurality of high-pressure fan-shaped nozzles 29 of the second high-pressure spray pipeline 21 are located above the second screen 5;

[0094] A plurality of high-pressure fan-shaped spray nozzles 29 of the third high-pressure spray pipeline 22 are located above the third screen 6;

[0095] A plurality of high-pressure fan-shaped nozzles 29 of the fourth high-pressure spray pipeline 23 are located above the fourth screen 7 .

[0096] A high-pressure spray pipeline is arranged above each layer of screen. Each high-pressure spray pipeline includes a water inlet pipe 24, a high-pressure water pump 25, a spray pipe 28, a high-pressure fan-shaped nozzle 29 and a frequency converter 27. The water inlet pipe 24 is connected to a water tank for supplying water to the high-pressure spray system. The high-pressure water pump 25 is used to pressurize the water. The pressurized water reaches the high-pressure fan-shaped nozzle 29 through the spray pipe 28, and finally the screen and the screened material are flushed, cut and cleaned through the high-pressure fan-shaped nozzle 29.

[0097] Further optimizing the scheme, the visual intelligent recognition system includes a first image recognition component 16, a second image recognition component 17, a third image recognition component 18 and a fourth image recognition component 19, the first image recognition component 16 is fixedly connected to the first chute 12, the second image recognition component 17 is fixedly connected to the second chute 13, the third image recognition component 18 is fixedly connected to the third chute 14, and the fourth image recognition component 19 is fixedly connected to the fourth chute 15;

[0098] The first image recognition component 16 , the second image recognition component 17 , the third image recognition component 18 and the fourth image recognition component 19 are electrically connected to the control system.

[0099] An information processing method for intelligent spray pressure control comprises the following steps:

[0100] The first step is to obtain a real-time depth image of the screened product in each chute through two depth cameras installed on the chute;

[0101] The second step is to pre-process the real-time two-dimensional image using digital image processing technology to obtain the complete aggregate contour, and further extract the characteristic parameters of the aggregate in combination with the real-time depth map, including the total number of pixels in the aggregate contour area, the equivalent ellipse minor axis radius and the equivalent ellipse major axis radius of the fitted aggregate contour area, and the maximum depth difference in the aggregate contour area;

[0102] The third step is to construct an aggregate characteristic parameter processing algorithm, taking the equivalent ellipse minor axis radius and the equivalent ellipse major axis radius of the fitted aggregate contour area, and twice the average value of the maximum depth difference in the aggregate contour area as the aggregate particle size, and on this basis, taking the ratio of the total number of pixels in the aggregate contour area of ​​different particle size ranges in the two-dimensional image as the ratio of aggregates in different particle size ranges;

[0103] Step 4: Calculate the total amount and proportion of components in each chute to generate the spray pressure of each high-pressure spray pipeline.

[0104] The first chute 12, the second chute 13, the third chute 14 and the fourth chute 15 are respectively provided with a first image recognition component 16, a second image recognition component 17, a third image recognition component 18 and a fourth image recognition component 19, each of which includes two depth cameras. While the sieved products of each layer of the screen are collected through the corresponding chute, the depth camera obtains the real-time two-dimensional image and depth map of the sieved products in the corresponding chute, and the digital image information is transmitted to the control system. The control system includes an information processing terminal, which pre-processes the real-time two-dimensional image and extracts the characteristic parameters of the aggregate by using digital image processing technology, and then calculates the aggregate characteristic parameter processing algorithm configured by the information processing terminal and the weight distribution algorithm matched therewith. The two depth cameras on each chute are respectively arranged at the front end and the middle of the chute under the corresponding image recognition component, so as to reduce the randomness of the sieved products in the chute and avoid the interference caused by excessive accumulation and excessive dispersion of the sieved products during transportation. The aggregate characteristic parameters obtained by digital image processing technology are calculated through the aggregate characteristic parameter processing algorithm to achieve quantitative extraction of aggregate size.

[0105] To further optimize the scheme, in the process of extracting aggregate characteristic parameters, record the average number of screening products in each level of chute to determine the total number of gravels with a particle size greater than 2mm on each level of sieve. At the same time, record and record the number of pixels and their proportions of "easy-to-screen particles" with a particle size less than 3 / 4 of the size of the previous level of sieve hole, "difficult-to-screen particles" with a particle size greater than 3 / 4 of the size of the previous level of sieve hole, "obstruction particles" with a particle size greater than the same level of sieve hole but less than 1.5 times the size of the sieve hole, and "low obstruction particles" with a particle size greater than 1.5 times the size of the same level of sieve hole, to determine the composition ratio of gravels greater than 2mm on each level of sieve. The total number of pixels of aggregates with a particle size greater than 2mm on each level of sieve is recorded as v i The ratio of the sum of the number of pixels of "difficult-to-screen particles" and "obstruction particles" to the sum of the number of pixels of "easy-to-screen particles" and "low-obstruction particles" on each level of the sieve is R i , V i v i With R i The product of (where i is the number of sieve levels).

[0106] The algorithm of the information processing terminal will make a comprehensive judgment based on the total number and composition of gravels larger than 2 mm on each level of the screen obtained by the aggregate characteristic parameter processing algorithm. In the actual working process, it is necessary to pre-determine and input the screening difficulty coefficient V according to the actual working situation. i0 and the initial spray pressure P i0 , and finally determine the corresponding spray pressure P i=(V i / V i0 )×P i0 , and the maximum spraying pressure is not more than 2 times of the initial spraying pressure, and the minimum is not less than 0.6 times of the initial spraying pressure. Finally, the control system converts the data into an electrical signal, and the receiver 26 in each spraying pipeline receives the signal and transmits the control signal to the inverter 27, which adjusts the pressure of the corresponding high-pressure water pump 25, thereby realizing the adaptive screening of shield slag screening by the screening system.

[0107] According to a further optimized solution, the first sieve 4 and the second sieve 5 are sieves with rectangular holes.

[0108] According to a further optimized solution, the third screen 6 and the fourth screen 7 are diamond-shaped anti-blocking screens.

[0109] Compared with the prior art, the present invention has the following advantages and technical effects:

[0110] 1. The vibration of the first-level screening box 2 and the second-level screening box 3 are driven by the first excitation motor 8 and the second excitation motor 9 with different excitation frequencies, respectively, to adapt to the vibration screening characteristics of sand and gravel in different particle size ranges. Each level of the vibration box has two layers of screens, which can perform multi-level screening on shield slag and strengthen the overall screening capacity. The processing capacity is ≥150m 3 / h.

[0111] 2. The screens of the primary screening box and the secondary screening box are rectangular hole screens and diamond anti-blocking screens respectively. The rectangular hole screens have stronger impact resistance, longer service life and lower cost, and are more suitable for the primary screening box to screen coarse aggregates. The diamond anti-blocking screens have stronger anti-blocking ability and higher cost, and are more suitable for the secondary screening box to screen fine aggregates. They can achieve 100% separation of coarse aggregates above 4.75mm and 95% separation of fine aggregates between 2-4.75mm.

[0112] 3. An independent chute is set on the lower side of each screen. An image recognition component is set above the chute, which can not only provide image information for the information processing terminal, but also play a role in long-term monitoring of the screening results, and can reflect the composition of shield slag in real time and intuitively.

[0113] 4. The pressure of each high-pressure spray pipeline in the high-pressure spray system is controlled in real time by the information processing terminal. The information processing terminal adopts feedback control and dynamically adjusts the pressure of each spray pipeline according to the number of each level of screening products in each level of chute through image recognition to maintain high screening capacity and low water consumption. It strengthens the adaptability of the screening system to different shield slag treatment, and at the same time achieves a balance between shield slag treatment efficiency and water resource saving ability.

[0114] 5. The intelligent algorithm for identifying sand and gravel in the chute image in the information processing terminal and the operation control of the frequency converter can be changed according to different construction realities, further enhancing the adaptability of the screening system to different shield slag treatment.

[0115] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0116] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A high-pressure spray adaptive multi-stage screening system, characterized in that: include: Support frame (1); A primary screening system, arranged above the support frame (1); A secondary screening system is arranged on the support frame (1) and is connected to and arranged below the primary screening system; High-pressure spray system, used to clean shield slag during screening process; Visual intelligent recognition system, used to determine the proportion of sand and gravel with different particle size ranges obtained after screening; A control system, electrically connected to the visual intelligent recognition system and the high-pressure spraying system, for adjusting the spraying pressure of the high-pressure spraying system according to the proportion of sand and gravel in different particle size ranges; The primary screening system comprises a primary screening box (2), the primary screening box (2) being fixed on the support frame (1), and a feed inlet (11) being provided on one side of the top of the primary screening box (2); The first-stage screening box (2) is provided with a first-stage excitation part; A first screen (4) and a second screen (5) are fixedly connected in sequence from top to bottom in the primary screening box (2), and the discharge end of the first screen (4) is connected to the feed end of the first chute (12); The discharge end of the second screen (5) is connected to the feed end of the second chute (13); The secondary screening system comprises a secondary screening box (3), a third screen (6) and a fourth screen (7) are fixedly connected in sequence from top to bottom in the secondary screening box (3), and a secondary excitation part is provided in the secondary screening box (3); The discharge end of the third screen (6) is connected to the feed end of the third chute (14); The discharge end of the fourth screen (7) is connected to the feed end of the fourth chute (15); The visual intelligent recognition system comprises a first image recognition component (16), a second image recognition component (17), a third image recognition component (18) and a fourth image recognition component (19), wherein the first image recognition component (16) is fixedly connected to the first chute (12), the second image recognition component (17) is fixedly connected to the second chute (13), the third image recognition component (18) is fixedly connected to the third chute (14), and the fourth image recognition component (19) is fixedly connected to the fourth chute (15).

2. A high-pressure spray adaptive multi-stage screening system according to claim 1, characterized in that: The first screen (4) and the second screen (5) are arranged obliquely, the high ends of the first screen (4) and the second screen (5) are arranged close to the feed port (11), and the diameter of the screen holes of the first screen (4) is larger than the diameter of the screen holes of the second screen (5); The bottom discharge end of the primary screening box (2) is in communication with the feed end of the secondary screening system.

3. A high-pressure spray adaptive multi-stage screening system according to claim 2, characterized in that: The top feed end of the secondary screening box (3) is connected to the bottom discharge end of the primary screening box (2); The third sieve (6) and the fourth sieve (7) are arranged obliquely, the high ends of the third sieve (6) and the fourth sieve (7) are arranged close to the feed port (11), the sieve hole diameter of the third sieve (6) is larger than the sieve hole diameter of the fourth sieve (7), and the sieve hole diameter of the third sieve (6) is smaller than the sieve hole diameter of the second sieve (5); The bottom discharge end of the secondary screening box (3) is connected to the feed end of the under-screen chute (10).

4. The high-pressure spray adaptive multi-stage screening system according to claim 2, characterized in that: The primary excitation part comprises a first excitation motor (8), and the first excitation motor (8) is fixedly connected to the inner wall of the primary screening box (2).

5. The high-pressure spray adaptive multi-stage screening system according to claim 3, characterized in that: The secondary excitation part comprises a second excitation motor (9), and the second excitation motor (9) is fixedly connected to the inner wall of the secondary screening box (3).

6. The high-pressure spray adaptive multi-stage screening system according to claim 3, characterized in that: The high-pressure spray system comprises a first high-pressure spray pipeline (20), a second high-pressure spray pipeline (21), a third high-pressure spray pipeline (22) and a fourth high-pressure spray pipeline (23), wherein the first high-pressure spray pipeline (20) and the second high-pressure spray pipeline (21) are connected to the interior of the primary screening box (2); The liquid outlet end of the first high-pressure spray pipeline (20) is located above the first screen (4); The liquid outlet end of the second high-pressure spray pipeline (21) is located above the second screen (5); The third high-pressure spray pipeline (22) and the fourth high-pressure spray pipeline (23) are in communication with the interior of the secondary screening box (3); The liquid outlet end of the third high-pressure spray pipeline (22) is located above the third screen (6); The liquid outlet end of the fourth high-pressure spray pipeline (23) is located above the fourth screen (7); The first high-pressure spray pipeline (20), the second high-pressure spray pipeline (21), the third high-pressure spray pipeline (22) and the fourth high-pressure spray pipeline (23) have the same structure.

7. A high-pressure spray adaptive multi-stage screening system according to claim 6, characterized in that: The first high-pressure spray pipeline (20) comprises a water inlet pipe (24), a high-pressure water pump (25), a spray pipe (28) and a plurality of high-pressure fan-shaped spray nozzles (29) which are sequentially connected and arranged; The high-pressure water pump (25) is electrically connected to a receiver (26) and a frequency converter (27), and the receiver (26) is electrically connected to the control system; The plurality of high-pressure fan-shaped spray nozzles (29) of the first high-pressure spray pipeline (20) are located above the first screen (4); The plurality of high-pressure fan-shaped spray heads (29) of the second high-pressure spray pipeline (21) are located above the second screen (5); The plurality of high-pressure fan-shaped spray heads (29) of the third high-pressure spray pipeline (22) are located above the third screen (6); The plurality of high-pressure fan-shaped spray heads (29) of the fourth high-pressure spray pipeline (23) are located above the fourth screen (7).

8. The high-pressure spray adaptive multi-stage screening system according to claim 3, characterized in that: The first image recognition component (16), the second image recognition component (17), the third image recognition component (18) and the fourth image recognition component (19) are electrically connected to the control system.

9. The high-pressure spray adaptive multi-stage screening system according to claim 2, characterized in that: The first screen (4) and the second screen (5) are rectangular hole screens.

10. The high-pressure spray adaptive multi-stage screening system according to claim 3, characterized in that: The third screen (6) and the fourth screen (7) are diamond-shaped anti-blocking screens.

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