A sewage treatment plant foundation pit excavation device and construction method

Abstract

The application relates to the technical field of mining devices, and particularly discloses a sewage treatment plant foundation pit excavation supporting structure and a construction method, which comprises a bottom plate, the upper end of the bottom plate is fixedly provided with symmetrical horizontal rods, the inner side of the horizontal rods is rotatably provided with a first conveying belt, a second conveying belt and a screening conveying belt; through integrated design, the bottom plate, the horizontal rods, the mounting support rods, the support plates, the crushing box, the excavating grab bucket and the conveying belts are organically combined, the problems of complicated construction and low efficiency caused by traditional equipment separation are solved, the bottom plate provides stable support, the conveying belts on the horizontal rods realize material conveying, the support plates are provided with excavating mechanisms, the excavating grab bucket excavates, the material is sent to the crushing box for crushing and screening after being sent by the conveying belts, an integrated operation process is formed, the efficiency is improved, material accumulation and spilling are avoided, and the site is kept clean.

Description

Technical Field

[0001] This invention relates to the field of excavation and construction technology, and in particular to a support structure and construction method for the excavation of a sewage treatment plant foundation pit. Background Technology

[0002] In the construction of sewage treatment plants, the excavation of the foundation pit is a key construction step, and the stability of the support after the foundation pit is excavated and the efficiency of the excavated materials processing directly affect the construction safety and progress.

[0003] Traditional sewage treatment plant foundation pit excavation and support structures have many shortcomings: on the one hand, the support structure is independent of the excavation and material conveying equipment, and needs to be deployed and operated separately, resulting in a complicated construction process, large space occupation, high coordination difficulty, and greatly reducing construction efficiency.

[0004] On the other hand, the excavated soil and rock materials need to be transported, crushed and screened by additional equipment. During the transportation process, material accumulation and spillage are likely to occur, which not only affects the cleanliness of the construction site, but also increases the cost of secondary cleaning. At the same time, the excavation mechanism lacks flexibility in adjusting the working range and depth, making it difficult to adapt to the excavation needs of foundation pits of different sizes. Furthermore, the excavated materials cannot be quickly and accurately transported to the subsequent processing stage, which further restricts the construction progress.

[0005] In addition, traditional structures lack effective integrated design and have poor coordination among components, which can lead to problems such as blockage and low efficiency during construction, making it difficult to meet the requirements of efficient, stable and safe construction for the excavation of sewage treatment plant foundation pits. Summary of the Invention

[0006] The purpose of this invention is to provide a support structure and construction method for the excavation of a sewage treatment plant foundation pit, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a support structure and construction method for excavation of a sewage treatment plant foundation pit, comprising a base plate, wherein symmetrical crossbars are fixedly installed on the upper end of the base plate, and a first conveyor belt, a second conveyor belt and a screening conveyor belt are rotatably installed on the inner side of the crossbars;

[0008] Symmetrical mounting support rods are provided above the crossbar. A support plate is fixedly installed on the upper ends of the two mounting support rods. A grooved rod is rotatably installed on the upper left side of the support plate. A sliding rod is slidably installed inside the grooved rod. A second motor is fixedly installed on both the front and rear sides of one end of the sliding rod. A digging grab is fixedly installed on the output shaft of the second motor.

[0009] A crushing box is fixedly installed between the inner sides of the mounting support rods. A material belt is rotatably installed on the upper end of the crushing box. A discharge block is fixedly installed on the inner side of the material belt. The discharge block is located on the inner side of the excavation grab bucket.

[0010] Preferably, a movable wheel is rotatably mounted inside the lower end of the base plate, and Mecanum wheels are rotatably mounted on the outer side of the base plate. Slide mounting blocks are fixedly mounted on the front and rear edges of the upper part of the base plate. A sliding mounting seat is slidably mounted from the inside to the outside of the slide mounting block. A shock-absorbing seat is fixedly mounted inside the upper end of the sliding mounting seat. Clamping plates are evenly fixedly mounted in a ring array on the upper end face of the shock-absorbing seat. Nuts are rotatably mounted on the outer side of the clamping plates via threads.

[0011] Preferably, a baffle is fixedly installed on the left side of the crossbars, and a first rotating shaft is rotatably installed on the left side inside the two crossbars. The first conveyor belt is rotatably installed on the circumferential surface of the first rotating shaft, and a first gear is fixedly installed on the circumferential surface of the first rotating shaft on the left side.

[0012] Preferably, a second rotating shaft is rotatably mounted on the inner sides of the two crossbars, and the outer circumferential surface of the second rotating shaft is rotatably connected to the screening conveyor belt. A main motor is fixedly mounted on the front end of the second rotating shaft on the left side, and a second gear is fixedly mounted on the output shaft of the main motor. A first chain is rotatably mounted on the circumferential surface of the second gear, and the inner side of the other end of the first chain is rotatably connected to the first gear.

[0013] Preferably, a third gear is fixedly installed at the rear end of the second rotating shaft on the left side, a second chain is rotatably installed on the circumferential surface of the third gear, a fourth gear is rotatably installed on the inner side of the other end of the second chain, a third rotating shaft is fixedly installed on the front end face of the fourth gear, a second conveyor belt is rotatably installed on the outer circumferential surface of the third rotating shaft, and another third rotating shaft is rotatably installed on the inner right end of the second conveyor belt, the third rotating shaft being rotatably installed on the inner side of the crossbar.

[0014] Preferably, a fifth gear is fixedly mounted on the outer side of the second gear, a third chain is rotatably mounted on the outer circumferential surface of the fifth gear, and a sixth gear is rotatably mounted on the inner side of the other end of the third chain.

[0015] Preferably, a first stirring shaft is rotatably mounted on the inner side of the upper end of the crossbar, and a seventh gear is fixedly mounted on the front end of the first stirring shaft. A fourth chain is rotatably mounted on the outer circumferential surface of the seventh gear, and the outer side of the seventh gear on the left side is fixedly connected to the rear end of the sixth gear.

[0016] Preferably, a second stirring shaft is rotatably mounted on the inner side of both the front and rear crossbars. An eighth gear is fixedly mounted on the rear circumferential surface of each of the second stirring shafts. A fifth chain is rotatably mounted on the circumferential surface of the eighth gears. A drive gear is rotatably mounted on the left side inside the fifth chain. A driven gear is fixedly mounted on the rear end of the drive gear. The tooth grooves on the circumferential surfaces of the driven gear and the second stirring shaft mesh with each other.

[0017] Preferably, threaded rods are threadedly mounted at the outer corners of the crushing box. The lower end of each threaded rod is threadedly mounted to the upper surface of a mounting support rod. A mounting rod is fixedly mounted at the lower end of each mounting support rod, and the mounting rod is slidably mounted inside the clamping plate. A crushing shaft is rotatably mounted inside the crushing box. Large gears are fixedly mounted at adjacent ends of each crushing shaft, and these large gears mesh with each other. A linkage gear is fixedly mounted at the other end of one of the crushing shafts. A linkage chain is rotatably mounted on the outer circumference of the linkage gear. A connecting gear is rotatably mounted on the inner side of the other end of the linkage chain. The rear end of the connecting gear is fixedly connected to the outer side of the sixth gear. A vertical rod is fixedly mounted on the upper surface of the support plate. The vertical rod is rotatably connected to a grooved rod. A telescopic pump is fixedly mounted on the outer side of the grooved rod. The telescopic rod of the telescopic pump is fixedly connected to the outer side of the sliding rod.

[0018] A support structure for the excavation of a wastewater treatment plant foundation pit, the construction method of which includes the following steps:

[0019] Step 1: Determine the location of the excavation pit by measuring and setting out. Then, move the base plate to the predetermined position of the sewage treatment long foundation pit by using the moving wheels and Mecanum wheels. Adjust the sliding mounting seat to slide inside the sliding mounting block, and tighten the clamping plate with nuts to fix the insertion rod to the shock absorber seat to achieve stable support of the device.

[0020] Step 2: Start the excavation operation. Start the second motor. The output shaft of the second motor will rotate the excavation grab bucket to carry out the foundation pit excavation operation. The excavated material is temporarily stored inside the excavation grab bucket.

[0021] Step 3: When the excavator grab reaches its highest point, the material slides down onto the conveyor belt through the discharge block and is then transported to the inside of the crushing chamber. The main motor is then started, and its output shaft drives the linkage chain to rotate. The linkage chain drives the linkage gear to rotate, and the rotating linkage gear drives the crushing shaft to rotate. Thus, the soil and rock are crushed, and the crushed material falls onto the first conveyor belt.

[0022] Step 4: The first conveyor belt transports the material to the screening conveyor belt for screening. At the same time, the first and second stirring shafts are driven by the main motor to agitate the material to improve screening efficiency. The screened material is then transported to the designated location via the second conveyor belt.

[0023] Step 5: Adjust the position of the slide bar in the grooved rod using the telescopic pump to control the digging depth of the excavation grab. During the excavation process, use a layered excavation method. After each layer is excavated, manually apply shotcrete for protection to prevent the excavated pit from collapsing.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. This invention, through integrated design, organically combines the base plate, crossbars, mounting support rods, support plate, crushing box, excavating grab, and conveyor belt, solving the problems of cumbersome construction and low efficiency caused by the separation of traditional equipment. The base plate provides stable support, the conveyor belt on the crossbars realizes material transportation, the support plate installs the excavation mechanism, the excavating grab performs excavation, and the material is sent to the crushing box by the conveyor belt for crushing and screening, forming an integrated operation process, improving efficiency, avoiding material accumulation and spillage, and keeping the site clean.

[0026] 2. This invention, by rotating a grooved rod on a support plate, with a sliding rod slidably installed inside the grooved rod, and a second motor and excavating grab installed at the end of the sliding rod, and cooperating with a telescopic pump to drive the sliding rod to slide, achieves precise adjustment of the excavating depth of the excavating grab. At the same time, the grooved rod can rotate around the upright, expanding the excavation operation range and adapting to the excavation needs of sewage treatment plant foundation pits of different sizes. It solves the problem of the limited applicability of traditional equipment and improves the versatility and construction flexibility of the equipment.

[0027] 3. This invention utilizes a main motor in conjunction with a gear chain drive to synchronously drive the first conveyor belt, the second conveyor belt, the screening conveyor belt, the first mixing shaft, the second mixing shaft, and the crushing shaft. This ensures efficient and coordinated excavation, conveying, crushing, and screening, avoiding power waste and operational stalls caused by independent drives. The installation support rods are fixed to the base plate clamping plate via insert rods, and combined with shock-absorbing seats for buffering, improve overall stability and seismic resistance. Combined with layered excavation and shotcrete protection construction methods, it effectively prevents foundation pit collapse, solving the problems of insufficient stability and high construction safety risks associated with traditional structures, ensuring safe and reliable construction. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a structural diagram of the main body of the present invention;

[0030] Figure 2 This is a schematic diagram of the component structure of the present invention;

[0031] Figure 3 This is a structural diagram of the floor, casters, and Mecanum wheels of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the first conveyor belt, the screening conveyor belt, and the second conveyor belt of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the first conveyor belt, the screening conveyor belt, and the second conveyor belt of the present invention;

[0034] Figure 6 This is a structural diagram of the second rotating shaft and the main motor of the present invention;

[0035] Figure 7 This is a schematic diagram of the first and second stirring shafts of the present invention;

[0036] Figure 8 This is a schematic diagram of the mounting support rod and crushing box of the present invention;

[0037] Figure 9 This is a schematic diagram of the crushing shaft of the present invention;

[0038] Figure 10 This is a schematic diagram of the crushing box and upright pole of the present invention;

[0039] Figure 11 This is a schematic diagram of the telescopic pump and slide bar of the present invention;

[0040] Figure 12 This is a schematic diagram of the excavation grab bucket of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Base plate; 101. Casters; 102. Mecanum wheels; 103. Slide mounting block; 104. Sliding mounting base; 105. Shock absorber base; 106. Clamping plate; 107. Nuts;

[0043] 2. Crossbar; 201. Baffle; 202. First rotating shaft; 203. First conveyor belt; 204. First gear; 205. Second rotating shaft; 206. Main motor; 207. Second gear; 208. First chain; 209. Third gear; 210. Second chain; 211. Third rotating shaft; 212. Second conveyor belt; 213. Fourth gear; 214. Fifth gear; 215. Third chain; 216. Sixth gear; 217. First stirring shaft; 218. Seventh gear; 219. Fourth chain; 220. Tooth groove; 221. Driven gear; 222. Drive gear; 223. Second stirring shaft; 224. Eighth gear; 225. Fifth chain; 226. Screening conveyor belt;

[0044] 3. Install support rod; 301. Install insertion rod; 302. Install threaded rod; 303. Crushing box; 304. Crushing shaft; 305. Linkage gear; 306. Linkage chain; 307. Connecting gear; 308. Large gear; 309. Material belt; 310. Discharge block;

[0045] 4. Support plate; 401. Upright pole; 402. Grooved rod; 403. Sliding rod; 404. Telescopic pump; 405. Second motor; 406. Excavating grab bucket. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Please see Figures 1 to 12 The present invention provides a technical solution:

[0048] A support structure for the excavation of a wastewater treatment plant foundation pit includes a bottom slab 1, which is a U-shaped structure, and there are two bottom slabs 1, such as... Figure 1 As shown, each of the lower ends of the base plate 1 is rotatably mounted with a movable wheel 101. It should be noted that the movable wheel 101 has a built-in stator and an external rotor. The rotor and the movable wheel 101 are fixedly connected. Therefore, the movable wheel 101 can rotate during use.

[0049] Mecanum wheels 102 are rotatably mounted on the front and rear edges of the outer side of the base plate 1 for rotational adjustment when the base plate 1 moves. It should be noted that each Mecanum wheel 102 can be driven by a motor during use, so that the Mecanum wheel 102 can turn, thereby adjusting the direction of the entire device.

[0050] Each Mecanum wheel 102 has a power output device (motor) that drives the Mecanum wheel 102 to rotate. However, during use, by adjusting the speed of each Mecanum wheel 102, the movement trajectory of each Mecanum wheel 102 will be different. When combined, the Mecanum wheels 102 can drive the base plate 1 to move in different directions, such as forward, backward and left and right rotation.

[0051] Slide mounting blocks 103 are fixedly installed on both the front and rear edges of the upper part of the base plate 1. Slide mounting seats 104 are slidably installed inside and above the slide mounting blocks 103. Shock-absorbing seats 105 are fixedly installed on the upper inner side of the slide mounting seats 104. Clamping plates 106 are evenly fixedly installed in a circular array on the upper end face of the shock-absorbing seats 105. Nuts 107 are threadedly and rotatably installed on the outer surface of the clamping plates 106. Figure 3 and Figure 8 As shown.

[0052] During use, the movable wheel 101 moves the base plate 1, the Mecanum wheel 102 rotates, and the sliding mounting block 103 is used to slide and combine with the sliding mounting seat 104. At this time, since the sliding mounting seat 104 and the sliding mounting block 103 are in a sliding connection state, the sliding mounting seat 104 will move synchronously with the base plate 1 during its movement.

[0053] Secondly, the shock absorber 105, clamping plate 106 and nut 107 move synchronously. In subsequent operations, rotating nut 107 can move up and down, thereby allowing the upper end of clamping plate 106 to retract inward, completing the fixing of insertion rod 301 and subsequent shock absorption.

[0054] It should be noted that the clamping plate 106 is composed of multiple unconnected arc-shaped plates, and the diameter of its upper end is slightly larger than that of its lower end. Therefore, the upper end of the clamping plate 106 can be retracted inward by the action of the nut 107.

[0055] Two symmetrical crossbars 2 are fixedly installed on the upper surface of the base plate 1. A baffle 201 is fixedly installed on the left side of both crossbars 2. A symmetrical first rotating shaft 202 is rotatably installed on the left side inside the two crossbars 2. Figure 5 and Figure 4 As shown, a first conveyor belt 203 is rotatably mounted on the circumferential surface of the first rotating shaft 202, and a first gear 204 is fixedly mounted on the front end of the left side of the first rotating shaft 202. Figure 4 and Figure 5 As shown.

[0056] Secondly, two second rotating shafts 205 are rotatably installed on the inner side of the two front and rear crossbars 2. A screening conveyor belt 226 is rotatably installed on the circumference of the two second rotating shafts 205. Then, a main motor 206 is installed at the front end of the left-side second rotating shaft 205. The output shaft of the main motor 206 is bidirectional, and its rear end is fixedly connected to the front end of the adjacent second rotating shaft 205. Furthermore, the main motor 206 is fixedly installed inside the left end of the front crossbar 2. Figure 4 As shown, a second gear 207 is fixedly mounted on the front output shaft of the main motor 206. A first chain 208 is rotatably mounted on the circumferential surface of the second gear 207. The other end of the first chain 208 is rotatably connected to the first gear 204. Figure 5 As shown.

[0057] A third gear 209 is fixedly installed at the rear end of the second rotating shaft 205 on the left side (it should be noted that the rear end of the second rotating shaft 205 on the left side is rotatably installed on the rear crossbar 2, but the rear end extends to the outside of the crossbar 2), and a second chain 210 is rotatably installed on the outer circumferential surface of the third gear 209.

[0058] Then, a symmetrical third rotating shaft 211 is rotatably installed on the right side inside the two crossbars 2. A second conveyor belt 212 is rotatably installed on the circumference of the third rotating shaft 211. A fourth gear 213 is fixedly installed at the rear end of the left third rotating shaft 211. The fourth gear 213 is rotatably connected to the second chain 210, as shown below. Figure 5 As shown.

[0059] Secondly, a fifth gear 214 is fixedly installed at the front end of the second gear 207, a third chain 215 is rotatably installed on the circumference of the fifth gear 214, and a sixth gear 216 is rotatably installed inside the other end of the third chain 215.

[0060] Furthermore, a first stirring shaft 217 is horizontally and evenly mounted on the upper end of both the front and rear crossbars 2. A seventh gear 218 is fixedly mounted on the front end of the first stirring shaft 217 on the left side. Figure 7 As shown, the rear ends of the seventh gear 218 and the sixth gear 216 on the left are fixedly connected (therefore, during use, the third chain 215 rotates, causing the sixth gear 216 to rotate, and the sixth gear 216 will drive the seventh gear 218 to rotate synchronously; the fourth chain 219 driven by the seventh gear 218 rotates synchronously with the first stirring shaft 217 fixedly connected to the rear end). Then, the fourth chain 219 is rotatably mounted on the circumferential surface of multiple seventh gears 218, as shown... Figure 7 As shown.

[0061] A toothed groove 220 is provided on the rear circumferential surface of the second rotating shaft 205 on the left side, and a driven gear 221 is rotatably installed inside the rear crossbar 2. The driven gear 221 meshes with the toothed groove 220, and a drive gear 222 is fixedly installed at the front end of the driven gear 221. Then, a second stirring shaft 223 is rotatably installed laterally inside the front and rear crossbars 2. An eighth gear 224 is fixedly installed on the rear circumferential surface of the second stirring shaft 223. A fifth chain 225 is rotatably installed on the circumferential surface of the eighth gear 224, and the left side interior of the fifth chain 225 is rotatably connected to the drive gear 222.

[0062] During use, the main motor 206 is started, the output shaft of the main motor 206 drives the second gear 207, the second gear 207 drives the first chain 208, the first chain 208 drives the first gear 204, the first gear 204 drives the first rotating shaft 202 to rotate, and the rotation of the first rotating shaft 202 drives the first conveyor belt 203 to rotate, thereby realizing the conveying operation of primary raw materials.

[0063] The output shaft of the main motor 206 drives the second rotating shaft 205 to rotate, thereby causing the screening conveyor belt 226 to rotate and perform conveying operations.

[0064] Next, the second rotating shaft 205 drives the driven gear 221 to rotate through the tooth groove 220. The driven gear 221 drives the driving gear 222 to rotate. The driving gear 222 drives the fifth chain 225 to rotate. The fifth chain 225 drives the eighth gear 224 to rotate. The eighth gear 224 drives the second stirring shaft 223 to rotate, thereby realizing the disturbance operation of fine raw materials.

[0065] Furthermore, the second shaft 205 drives the third gear 209 to rotate, the third gear 209 drives the second chain 210 to rotate, the second chain 210 drives the fourth gear 213 to rotate, the fourth gear 213 drives the third shaft 211 to rotate, and the third shaft 211 causes the second conveyor belt 212 to rotate, thereby realizing the conveying operation of the crushed raw materials.

[0066] Next, the fifth gear 214 rotates, which in turn drives the third chain 215 to rotate. When the third chain 215 rotates, it drives the sixth gear 216 to rotate. When the sixth gear 216 rotates, it drives the seventh gear 218 to rotate. When the seventh gear 218 rotates, it drives the first stirring shaft 217 to rotate, thereby achieving the disturbance operation of the crushed raw materials.

[0067] A mounting support rod 3 is provided above the crossbar 2. Insertion rods 301 are fixedly installed on both sides of the lower end of the mounting support rod 3. The insertion rods 301 are used to slide and connect with the clamping plate 106.

[0068] A threaded mounting rod 302 is rotatably mounted on the upper end face of the mounting support rod 3. A crushing box 303 is mounted on the circumference of the threaded mounting rod 302. Symmetrically arranged crushing shafts 304 are rotatably mounted inside the crushing box 303. Large gears 308 are fixedly mounted on adjacent ends of the crushing shafts 304, and the large gears 308 mesh with each other. A linkage gear 305 is fixedly mounted on the other end of one of the crushing shafts 304. A linkage chain 306 is rotatably mounted on the circumference of the linkage gear 305. A connecting gear 307 is rotatably mounted on the other end of the linkage chain 306. The connecting gear 307 and the sixth gear 216 are fixedly connected. Thus, during use, the rotation of the sixth gear 216 will synchronously rotate the connecting gear 307.

[0069] During use, the sixth gear 216 drives the connecting gear 307 to rotate synchronously, the connecting gear 307 drives the linkage chain 306 to rotate synchronously, the linkage chain 306 drives the linkage gear 305 to rotate synchronously, the linkage gear 305 drives the crushing shaft 304 to rotate synchronously, the crushing shaft 304 drives the large gear 308 to rotate synchronously, and the large gear 308 drives another large gear 308 to rotate synchronously, thereby realizing that the two crushing shafts 304 rotate in opposite directions to achieve the crushing operation of the raw materials.

[0070] Next, a support plate 4 is fixedly installed on the upper end face of the support rod 3. A vertical rod 401 is fixedly installed on the upper end face of the support plate 4. A grooved rod 402 is rotatably installed on the upper left side of the vertical rod 401. A sliding rod 403 is slidably installed from the inside to the outer side of the grooved rod 402. A telescopic pump 404 is fixedly installed on both the upper and lower outer sides of the grooved rod 402. The telescopic rod of the telescopic pump 404 and the sliding rod 403 are in a fixed connection state, such as... Figure 10 and Figure 11 As shown.

[0071] Then, a second motor 405 is fixedly installed on both the front and rear sides of the outer side of the slide bar 403. A disc is fixedly installed on the output shaft of the second motor 405. Digging grabs 406 are evenly fixedly installed in a circular array on the edge of the disc. Then, a discharge block 310 is rotatably arranged on the inner side of the digging grab 406, that is, on the outer side of the disc. A material belt 309 is fixedly installed at the center of the outer side of the discharge block 310. The other end of the material belt 309 is rotatably installed at the upper edge of the crushing box 303. The material belt 309 is rotated using a motor or other driving device. Figure 10 and Figure 12 As shown.

[0072] During use, the second motor 405 is started. The output shaft of the second motor 405 drives the digging grab 406 to rotate through the disc, realizing continuous digging of raw materials. When the digging grab 406 rotates to the highest position, the raw materials inside it will fall downwards and slide down the middle V groove of the unloading block 310 onto the material belt 309. Then, under the action of the material belt 309, it enters the crushing box 303 for crushing. After completion, it falls to the upper end of the first conveyor belt 203, then falls onto the screening conveyor belt 226 for screening, and finally falls onto the second conveyor belt 212 and is transported to the appropriate position.

[0073] Secondly, when it is necessary to adjust the excavation grab 406, the telescopic pump 404, through its telescopic rod, slides the slide bar 403, thereby driving the second motor 405 to move, which in turn drives the subsequent excavation grab 406 to be adjusted. Combined with the rotating state of the grooved rod 402, the excavation grab 406 can change the excavation angle.

[0074] A support structure for the excavation of a wastewater treatment plant foundation pit, the construction method of which includes the following steps:

[0075] Step 1: Determine the location of the excavation pit by measuring and setting out. Then, move the base plate 1 to the predetermined position of the sewage treatment long foundation pit by using the moving wheel 101 and Mecanum wheel 102. Adjust the sliding mounting seat 104 to slide inside the sliding mounting block 103, and tighten the clamping plate 106 with the nut 107 to fix the insertion rod 301 to the shock absorber seat 105, so as to achieve stable support of the device.

[0076] Step 2: To carry out the excavation operation, start the second motor 405. The output shaft of the second motor 405 will drive the excavation grab 406 to rotate, and carry out the foundation pit excavation operation. The excavated material is temporarily stored inside the excavation grab 406.

[0077] Step 3: When the excavator grab 406 rotates to its highest position, the material slides down through the discharge block 310 onto the conveyor belt 309, and is then conveyed by the conveyor belt 309 into the crushing box 303. The main motor 206 is started, and the output shaft of the main motor 206 drives the linkage chain 306 to rotate. The linkage chain 306 drives the linkage gear 305 to rotate, and the rotation of the linkage gear 305 drives the crushing shaft 304 to rotate. Thus, the crushing operation of soil and rock is achieved, and the crushed material falls onto the first conveyor belt 203.

[0078] Step 4: The first conveyor belt 203 conveys the material to the screening conveyor belt 226 for screening. At the same time, the first stirring shaft 217 and the second stirring shaft 223 are driven by the main motor 206 to agitate the material and improve the screening efficiency. The screened material is then conveyed to the designated position via the second conveyor belt 212.

[0079] Step 5: Adjust the position of the slide bar 403 in the groove bar 402 by using the telescopic pump 404 to control the excavation depth of the excavation grab 406. During the excavation process, the excavation is carried out in layers. After each layer is excavated, the excavated foundation pit is protected by sprayed concrete to prevent the foundation pit from collapsing.

[0080] Finally, through the above construction steps, the excavation of each layer needs to be precisely controlled during the excavation process. After each layer is excavated, the workers need to check the flatness of the excavation surface and clean up the loose soil and rocks to ensure that the base is free of slag, obvious protrusions or depressions.

[0081] Subsequently, the shotcrete was mixed according to the design ratio and sprayed evenly layer by layer from the bottom of the foundation pit upwards using a special shotcrete machine. The spray thickness was controlled at 5-8cm and the spray pressure was maintained at 0.3-0.5MPa to avoid defects such as missed spraying and hollow areas.

[0082] After the shotcrete is completed, the concrete protective layer should be watered and cured for at least 24 hours. Excavation of the next layer can only begin after the protective layer has reached 70% of its design strength. The entire process must strictly adhere to construction specifications to ensure the stability of each support structure, effectively prevent the risk of collapse due to stress concentration on the pit sidewalls, and guarantee construction safety and project quality.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wastewater treatment plant foundation pit excavation equipment, characterized in that: Includes a base plate (1), on the upper end of which a symmetrical crossbar (2) is fixedly installed, and on the inner side of the crossbar (2) a first conveyor belt (203), a second conveyor belt (212) and a screening conveyor belt (226) are rotatably installed. A symmetrical mounting support rod (3) is provided above the crossbar (2). The upper ends of the two mounting support rods (3) are fixedly mounted with a support plate (4). A grooved rod (402) is rotatably mounted on the upper left side of the support plate (4). A sliding rod (403) is slidably mounted inside the grooved rod (402). A second motor (405) is fixedly mounted on both the front and rear sides of one end of the sliding rod (403). A digging grab (406) is fixedly mounted on the output shaft of the second motor (405). A crushing box (303) is fixedly installed between the inner sides of the mounting support rod (3). A material belt (309) is rotatably installed on the upper end of the crushing box (303). A discharge block (310) is fixedly installed on the inner side of the material belt (309). The discharge block (310) is located on the inner side of the excavation grab (406).

2. The wastewater treatment plant foundation pit excavation equipment according to claim 1, characterized in that: The lower end of the base plate (1) is rotatably mounted with a movable wheel (101), and the outer side of the base plate (1) is rotatably mounted with Mecanum wheels (102). The upper front and rear edges of the base plate (1) are fixedly mounted with sliding mounting blocks (103). The sliding mounting blocks (103) are slidably mounted with sliding mounting seats (104) from the inside to the outside. The upper end of the sliding mounting seats (104) is fixedly mounted with a shock-absorbing seat (105). The upper end face of the shock-absorbing seat (105) is evenly fixedly mounted with clamping plates (106) in a ring array. The outer side of the clamping plates (106) is rotatably mounted with nuts (107) by threads.

3. The wastewater treatment plant foundation pit excavation equipment according to claim 2, characterized in that: A baffle (201) is fixedly installed on the left side of the crossbar (2). A first rotating shaft (202) is rotatably installed on the left side inside the two crossbars (2). The first conveyor belt (203) is rotatably installed on the circumferential surface of the first rotating shaft (202). A first gear (204) is fixedly installed on the circumferential surface of the first rotating shaft (202) on the left side.

4. The wastewater treatment plant foundation pit excavation equipment according to claim 3, characterized in that: The inner sides of the two crossbars (2) are rotatably mounted with a second shaft (205). The outer circumferential surface of the second shaft (205) is rotatably connected to the screening conveyor belt (226). The front end of the second shaft (205) on the left side is fixedly mounted with a main motor (206). The output shaft of the main motor (206) is fixedly mounted with a second gear (207). The circumferential surface of the second gear (207) is rotatably mounted with a first chain (208). The inner side of the other end of the first chain (208) is rotatably connected to the first gear (204).

5. The wastewater treatment plant foundation pit excavation equipment according to claim 4, characterized in that: A third gear (209) is fixedly installed at the rear end of the second rotating shaft (205) on the left side. A second chain (210) is rotatably installed on the circumferential surface of the third gear (209). A fourth gear (213) is rotatably installed on the inner side of the other end of the second chain (210). A third rotating shaft (211) is fixedly installed on the front end face of the fourth gear (213). A second conveyor belt (212) is rotatably installed on the outer circumferential surface of the third rotating shaft (211). Another third rotating shaft (211) is rotatably installed on the inner right end of the second conveyor belt (212). The third rotating shaft (211) is rotatably installed on the inner side of the crossbar (2).

6. The wastewater treatment plant foundation pit excavation equipment according to claim 5, characterized in that: A fifth gear (214) is fixedly installed on the outer side of the second gear (207), a third chain (215) is rotatably installed on the outer circumferential surface of the fifth gear (214), and a sixth gear (216) is rotatably installed on the inner side of the other end of the third chain (215).

7. The wastewater treatment plant foundation pit excavation equipment according to claim 6, characterized in that: The upper inner side of the crossbar (2) is rotatably mounted with a first stirring shaft (217). The front end of the first stirring shaft (217) is fixedly mounted with a seventh gear (218). The outer circumferential surface of the seventh gear (218) is rotatably mounted with a fourth chain (219). The outer side of the seventh gear (218) is fixedly connected to the rear end of the sixth gear (216).

8. The wastewater treatment plant foundation pit excavation equipment according to claim 7, characterized in that: The inner sides of the two crossbars (2) are rotatably mounted with a second stirring shaft (223). The rear end circumferential surface of the second stirring shaft (223) is fixedly mounted with an eighth gear (224). The circumferential surface of the eighth gear (224) is rotatably mounted with a fifth chain (225). The inner left side of the fifth chain (225) is rotatably mounted with a drive gear (222). The rear end of the drive gear (222) is fixedly mounted with a driven gear (221). The driven gear (221) meshes with the tooth groove (220) opened on the circumferential surface of the second rotating shaft (205).

9. The wastewater treatment plant foundation pit excavation equipment according to claim 8, characterized in that: At the outer corner of the crushing box (303), a threaded mounting rod (302) is rotatably installed. The lower end of the threaded mounting rod (302) is rotatably installed on the upper end face of the mounting support rod (3). The lower end of the mounting support rod (3) is fixedly installed with a insertion rod (301). The insertion rod (301) is slidably installed inside the clamping plate (106). A crushing shaft (304) is rotatably installed inside the crushing box (303). A large gear (308) is fixedly installed at one adjacent end of the crushing shaft (304). The large gears (308) mesh with each other. The other end of one of the crushing shafts (304) A linkage gear (305) is fixedly installed. A linkage chain (306) is rotatably installed on the outer circumferential surface of the linkage gear (305). A connecting gear (307) is rotatably installed on the inner side of the other end of the linkage chain (306). The rear end of the connecting gear (307) is fixedly connected to the outer side of the sixth gear (216). A vertical rod (401) is fixedly installed on the upper end surface of the support plate (4). The vertical rod (401) and the grooved rod (402) are rotatably connected. A telescopic pump (404) is fixedly installed on the outer side of the grooved rod (402). The telescopic rod of the telescopic pump (404) is fixedly connected to the outer side of the sliding rod (403).

10. A construction method for the excavation and support structure of a sewage treatment plant foundation pit, using the sewage treatment plant foundation pit excavation equipment described in claim 9, characterized in that: The construction method for the excavation and support structure of the wastewater treatment plant foundation pit includes the following steps: Step 1: Determine the location of the excavation pit by measuring and setting out. Then, move the base plate (1) to the predetermined position of the sewage treatment plant pit by using the moving wheels (101) and Mecanum wheels (102). Adjust the sliding mounting seat (104) to slide inside the chute mounting block (103), and tighten the clamping plate (106) with nuts (107) to fix the insertion rod (301) and the shock absorber seat (105) to achieve stable support of the device. Step 2: To carry out the excavation operation, start the second motor (405). The output shaft of the second motor (405) will rotate the excavation grab (406) to carry out the foundation pit excavation operation. The excavated material is temporarily stored inside the excavation grab (406). Step 3: When the excavator grab (406) rotates to its highest position, the material slides down onto the conveyor belt (309) through the unloading block (310), and is then conveyed by the conveyor belt (309) to the inside of the crushing box (303). The main motor (206) is started, and the output shaft of the main motor (206) will drive the linkage chain (306) to rotate. The linkage chain (306) will drive the linkage gear (305) to rotate, and the rotation of the linkage gear (305) will drive the crushing shaft (304) to rotate. Thus, the crushing operation of soil and rock is realized, and the crushed material falls onto the first conveyor belt (203). Step 4: The first conveyor belt (203) conveys the material to the screening conveyor belt (226) for screening. At the same time, the first stirring shaft (217) and the second stirring shaft (223) are driven by the main motor (206) to disturb the material and improve the screening efficiency. The screened material is then conveyed to the designated position by the second conveyor belt (212). Step 5: Adjust the position of the slide bar (403) in the groove bar (402) by using the telescopic pump (404) to control the excavation depth of the excavation grab (406). During the excavation process, the excavation is carried out in layers. After each layer is excavated, the excavated foundation pit is protected by sprayed concrete manually to prevent the foundation pit from collapsing.

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