Industrial plant intensive drainage ditch construction device and method

Abstract

The present application relates to the technical field of intensive drainage ditch construction in building engineering, and particularly relates to an intensive drainage ditch construction device and method for industrial plants, which comprises: a plurality of U-shaped steel molds, a plurality of through-wire opposite-pulling screw rods and a plurality of three-section opposite-pulling screw rods, the plurality of U-shaped steel molds are arranged side by side, and the adjacent two U-shaped steel molds are detachably fixedly connected through the plurality of three-section opposite-pulling screw rods; one end of each of the plurality of U-shaped steel molds towards the construction direction is detachably fixedly connected with an end steel mold through the plurality of through-wire opposite-pulling screw rods, the top end of each of the plurality of U-shaped steel molds is fixedly connected with a hoisting small crane, the upper end of each of the plurality of hoisting small cranes is arranged in a main frame, and a movable door-shaped hoisting mechanism is provided with a hoisting assembly for driving the main frame to vertically ascend and descend and a position adjusting assembly for driving the main frame to adjust the position along the width direction of the foundation pit, and the present application provides the intensive drainage ditch construction device and method for industrial plants which can improve the construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of dense drainage ditch construction technology in building engineering, and particularly to a device and method for constructing dense drainage ditches in industrial plants. Background Technology

[0002] Traditional industrial plant drainage ditch construction often uses wooden or prefabricated steel formwork to support the ditch within the curved foundation pit, followed by concrete pouring to form the drainage ditch. However, this traditional construction method has the following problems: 1. The template has low turnover efficiency and takes a long time to install and dismantle; 2. Positioning accuracy is difficult to guarantee when multiple channels are constructed simultaneously; 3. The formwork support system is complex, resulting in poor construction safety; 4. The quality of concrete molding is unstable, and problems such as misalignment and grout leakage are prone to occur. Summary of the Invention

[0003] The purpose of this invention is to provide a construction device and method for dense drainage ditches in industrial plants, so as to solve the technical problems existing in the background art.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: A construction device for dense drainage ditches in industrial plants includes: a foundation pit; a mobile gantry-type hoisting mechanism; and several U-shaped steel molds, through-thread tie rods, and three-section tie rods, each equipped with a plurality of such molds. The U-shaped steel molds are arranged side by side along the width of the foundation pit, and adjacent U-shaped steel molds are detachably and fixedly connected by a plurality of three-section tie rods. One end of each U-shaped steel mold facing the construction direction is detachably and fixedly connected to an end steel mold by a plurality of through-thread tie rods. The top of each U-shaped steel mold is fixedly connected to a hoisting device. Several small trolleys are installed at their upper ends inside the main frame. One of the small trolleys is fixedly connected to the main frame, while the others can slide on the main frame along the width of the pit. The mobile gantry hoisting mechanism spans both sides of the pit in the width direction and can move along the length of the pit. The mobile gantry hoisting mechanism is equipped with a lifting component for vertically raising and lowering the main frame and a position adjustment component for adjusting the position of the main frame along the width of the pit.

[0005] Furthermore, the U-shaped steel mold has several steel mold inner support plates fixedly connected at equal intervals inside, and the steel mold inner support plates are fixed perpendicularly to the inner wall of the U-shaped steel mold; the through-thread tie rod includes: through-thread tie rod, nut one and nut two, there are two nuts one, the through-thread tie rod passes through the end steel mold and the steel mold inner support plate near the end steel mold respectively, and two nuts one are threadedly connected to the two ends of the end steel mold and the steel mold inner support plate opposite to each other, and the nuts two are coaxially fixedly connected to the middle of the through-thread tie rod and located between the end steel mold and the steel mold inner support plate.

[0006] Furthermore, the three-section tie rod includes: a middle screw, a tapered sleeve, an end screw, and a nut. Two tapered sleeves, two end screws, and two nuts are provided. The small ends of the two tapered sleeves are threaded to both ends of the middle screw, and one end of the two end screws is threaded to the large end of the two tapered sleeves. The two end screws pass through the adjacent ends of the two U-shaped steel molds and are threaded to the inside of the two U-shaped steel molds.

[0007] Furthermore, the hoisting trolley includes: lifting rods, a frame, and sliders. There are four lifting rods, and the frame is a U-shaped frame structure. The upper ends of the four lifting rods are vertically fixed to the four corners of the bottom of the frame, and the lower ends of the four lifting rods are detachably fixed to the top of the U-shaped steel formwork. There are two sliders, which are symmetrically fixed to the two ends of the frame along the length of the pit. The two sliders are slidably connected to the main frame along the width of the pit.

[0008] Furthermore, the main frame includes: small crossbeams, small longitudinal beams, and positioning bolts. Two small crossbeams, two small longitudinal beams, and two positioning bolts are provided. The two small crossbeams and two small longitudinal beams are symmetrically arranged and enclosed to form a U-shaped frame structure. Two sliding grooves are symmetrically opened on the opposite side of the two small crossbeams. The two sliders of the hoisting trolley are slidably connected in the two sliding grooves. Two positioning screws pass through the two small crossbeams and are threadedly connected to the threaded holes opened on the two sliders of one of the hoisting trolleys.

[0009] Furthermore, the mobile gantry hoisting mechanism includes: a gantry-shaped hanger and a moving component. The gantry-shaped hanger includes: a main horizontal beam, columns, and main longitudinal beams. Two main horizontal beams span the two ends of the pit width direction and are symmetrically arranged along the pit length direction. Four columns are provided, and several main longitudinal beams are provided. The four columns are symmetrically fixedly connected to the two ends of the two main horizontal beams, and several main longitudinal beams are uniformly fixedly connected between the two columns symmetrically arranged along the pit length direction. The moving component includes: track wheels and tracks. Two tracks are provided, and the two tracks are parallel and symmetrically arranged on the ground on both sides of the pit width direction. Four track wheels are provided, and the four track wheels are respectively installed at the bottom ends of the four columns and are rotatably connected to the two tracks.

[0010] Furthermore, the mobile gantry hoisting mechanism also includes: a fixing component, of which four fixing components are provided, and the four fixing components are respectively set on the lower part of the outer wall of the four columns. The fixing component includes: an L-shaped connecting plate and a ground nail. The vertical part of the L-shaped connecting plate is fixedly connected to the lower part of the outer wall of the column, and the ground nail vertically penetrates the horizontal part of the L-shaped connecting plate and is inserted into the soil below the ground.

[0011] Furthermore, the lifting assembly includes: a lower lifting seat, an upper lifting seat, a hydraulic jack, and guide rods. The lower lifting seat is fixedly connected to the middle of the top of two small crossbeams. Two sliding grooves are symmetrically opened on one side of the two large crossbeams facing each other. The two ends of the upper lifting seat are slidably connected to the two sliding grooves along the width of the pit. The fixed end of the hydraulic jack is fixedly installed at the middle of the bottom of the upper lifting seat, and the telescopic end of the hydraulic jack is fixedly installed at the middle of the top of the lower lifting seat. Two guide rods are symmetrically arranged on both sides of the hydraulic jack along the length of the pit. The guide rods include: a straight rod and a cylindrical rod. The upper end of the cylindrical rod is fixedly connected to the bottom of the upper lifting seat, and the lower end of the straight rod is fixedly connected to the top of the lower lifting seat. The straight rod is vertically slidably connected inside the cylindrical rod.

[0012] Furthermore, the position adjustment assembly includes: a first top plate, a second top plate, a connecting lug, a bearing seat, a bearing, a screw, and a servo motor. The first top plate and the second top plate are respectively fixedly installed on both sides of the top of the portal frame. The connecting lug is fixedly connected to the middle of the top of the upper suspension seat. Two sets of bearing seats and bearings are provided. The two sets of bearing seats are respectively fixedly installed on the top of the first top plate and the second top plate. The screw passes through the two bearing seats along the width of the pit and is rotatably installed on the two bearing seats through the two sets of bearings. One end of the screw is fixedly connected to the output shaft of the servo motor. The servo motor is fixedly installed on the top of the second top plate.

[0013] A method for constructing dense drainage ditches in industrial plants, using the aforementioned construction device, includes the following steps: Step 1: Survey and set out to determine the center line and edge line of the drainage ditch to be constructed; excavate the foundation pit; Step 2: Fabricate U-shaped steel molds and end steel molds according to the design drawings. The height and width of the U-shaped steel molds are determined according to the depth and width of the drainage ditch to be constructed, and the height and width of the end steel molds are determined according to the depth and width of the foundation pit. Apply release agent to the contact surfaces of the U-shaped steel molds and the concrete, as well as the contact surfaces of the end steel molds and the concrete. Step 3: Fabricate and assemble a movable formwork hoisting construction system consisting of a mobile gantry hoisting mechanism, a position adjustment component, a lifting component, a main frame, and several hoisting trolleys; install the two tracks of the mobile gantry hoisting mechanism parallel to each other on the ground on both sides of the pit width direction, ensuring that the two tracks are at the same horizontal height; place the four track wheels of the mobile gantry hoisting mechanism on the two tracks; Step 4: At the construction site, assemble several U-shaped steel molds into an integrated steel mold using several three-section tie rods; Step 5: Hoist the integrated steel mold assembled in Step 4 into the foundation pit, and fix the top of several U-shaped steel molds to the bottom of several hoisting trolleys with bolts. Step Six: Lift the integrated steel formwork to the design elevation using the lifting assembly, and adjust the position of the integrated steel formwork using the position adjustment assembly; then install the end steel formwork to the end of the integrated steel formwork facing the construction direction using several through-thread tie rods, and install a sealing strip on the contact surface between the end steel formwork and the U-shaped steel formwork; Step 7: Pour concrete in layers, and use an immersion vibrator to compact the concrete; smooth and finish the concrete surface. Step 8: Once the concrete reaches the demolding strength, loosen the nuts on the outside of several tie rods and remove the end steel molds; then remove the end bolts at both ends of several three-section tie rods; operate the lifting assembly to lift the integrated steel mold; and reassemble several U-shaped steel molds into an integrated steel mold using several three-section tie rods, and push the mobile gantry hoisting mechanism to the next construction section; Step 9: Repeat steps 6 through 8 until the drainage ditch construction is completed.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention connects several U-shaped steel molds into an integrated steel mold using several three-section tie rods. The integrated steel mold is then hoisted into the foundation pit using a mobile formwork hoisting system consisting of a mobile gantry hoisting mechanism, a position adjustment component, a lifting component, a main frame, and several hoisting trolleys. Combined with the end steel molds, this forms a pouring formwork system capable of completing the integrated pouring operation of a single construction section of a dense drainage ditch. The integrated steel formwork ensures high-quality concrete forming and a smooth surface. Simultaneously, the mobile formwork hoisting system enables rapid transfer and precise positioning of the formwork. The entire construction process allows for the simultaneous construction of multiple drainage ditches, significantly improving construction efficiency. The mobile construction method reduces hoisting work and lowers construction risks. The formwork can be easily installed and disassembled using three-section tie rods and through-thread tie rods. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a construction device for dense drainage ditches in industrial plants provided by the present invention; Figure 2 This is a cross-sectional view of the through-wire tie rod of a construction device for dense drainage ditches in industrial plants provided by the present invention; Figure 3 yes Figure 2 A magnified view of a section at point A in the middle; Figure 4 yes Figure 2 A magnified view of a section at point C; Figure 5 This is a cross-sectional view of the three-section tie rod of the construction device for dense drainage ditches in industrial plants provided by the present invention; Figure 6 yes Figure 5 A magnified view of a section at point B in the middle; Figure 7 This is a cross-sectional view of the positioning bolts at a dense drainage ditch construction device for industrial plants provided by the present invention; Figure 8 This is a cross-sectional view of the screw section of a dense drainage ditch construction device for industrial plants provided by the present invention; Figure 9 yes Figure 8 A magnified view of a section at point D.

[0016] The labels in the attached diagram are as follows: 1-Foundation pit, 2-U-shaped steel formwork, 3-Inner support plate of steel formwork, 4-Threaded tie rod, 4-1-Threaded tie rod, 4-2-Nut one, 4-3-Nut two, 5-End steel formwork, 6-Diagonal brace, 7-Three-section tie rod, 7-1-Middle tie rod, 7-2-Conical sleeve, 7-3-End tie rod, 7-4-Nut three, 8-Hanging rod, 9-Hanger, 10-Slider, 11-Small crossbeam 12-Small longitudinal beam, 13-Positioning bolt, 14-Lower hanging bracket, 15-Upper hanging bracket, 16-Hydraulic jack, 17-Guide rod, 18-Large cross beam, 19-Column, 20-Large longitudinal beam, 21-Rail wheel, 22-Rail, 23-L-shaped connecting plate, 24-Ground nail, 25-Top plate one, 26-Top plate two, 27-Connecting ear, 28-Bearing seat, 29-Bearing, 30-Screw, 31-Servo motor. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] See Figures 1-9 As shown, a construction device for dense drainage ditches in industrial plants includes: a foundation pit 1, and further includes: a movable gantry hoisting mechanism and several U-shaped steel molds 2, through-thread tie rods 4, and three-section tie rods 7. The several U-shaped steel molds 2 are arranged side by side along the width direction of the foundation pit 1, and adjacent U-shaped steel molds 2 are detachably fixedly connected by several three-section tie rods 7; one end of several U-shaped steel molds 2 facing the construction direction is detachably fixedly connected to an end steel mold 5 by several through-thread tie rods 4, and the top end of the U-shaped steel mold 2 is fixed. A fixed hoisting trolley is connected to the main frame. The upper ends of several hoisting trolleys are respectively installed inside the main frame. One hoisting trolley is fixedly connected to the main frame, and the other hoisting trolleys can slide on the main frame along the width direction of the pit 1. A mobile gantry hoisting mechanism spans both sides of the pit 1 in the width direction and can move along the length direction of the pit 1. The mobile gantry hoisting mechanism is equipped with a lifting component for driving the main frame to rise and fall vertically and a position adjustment component for driving the main frame to adjust its position along the width direction of the pit 1.

[0019] The U-shaped steel mold 2 has several steel mold inner support plates 3 fixedly connected at equal intervals inside. The steel mold inner support plates 3 are fixed perpendicularly to the inner wall of the U-shaped steel mold 2. The through-thread tie rod 4 includes: through-thread rod 4-1, nut one 4-2 and nut two 4-3. There are two nuts one 4-2. The through-thread rod 4-1 passes through the end steel mold 5 and the steel mold inner support plate 3 on the side near the end steel mold 5. Two nuts one 4-2 are threaded to the two ends of the end steel mold 5 opposite to the steel mold inner support plate 3. Nut two 4-3 is coaxially fixedly connected to the middle of the through-thread rod 4-1 and located between the end steel mold 5 and the steel mold inner support plate 3. In order to improve the support stability of the end steel mold 5, several diagonal braces 6 can be set between the outer side of the end steel mold 5 and the bottom of the pit 1. The steel mold inner support plate 3 can improve the ability of the U-shaped steel mold to withstand the lateral pressure of concrete, and the steel mold inner support plate 3 at the end can also serve as a connecting support for the end steel mold 5.

[0020] The three-section tie rod 7 includes: a central tie rod 7-1, a tapered sleeve 7-2, an end tie rod 7-3, and a nut 7-4. Two tapered sleeves 7-2, two end tie rods 7-3, and two nuts 7-4 are provided. The small ends of the two tapered sleeves 7-2 are threaded to both ends of the central tie rod 7-1, and one end of the two end tie rods 7-3 is threaded to the large ends of the two tapered sleeves 7-2. The two end tie rods 7-3 pass through one adjacent end of the two U-shaped steel molds 2, and are threaded to the two nuts 7-4 inside the two U-shaped steel molds 2. The central tie rod 7-1 is directly embedded in the concrete after the concrete is poured. The tapered sleeves 7-2 are removed after the entire drainage ditch construction is completed, and the tapered holes formed by the tapered sleeves 7-2 are sealed.

[0021] The hoisting trolley includes: four lifting rods 8, four lifting frames 9, and four sliders 10. The lifting rods 8 are arranged in a 3D shape. The upper ends of the four lifting rods 8 are vertically fixed to the four corners of the bottom of the lifting frame 9, and the lower ends of the four lifting rods 8 are detachably fixed to the top of the U-shaped steel mold 2. There are two sliders 10. The two sliders 10 are symmetrically fixed to the two ends of the lifting frame 9 along the length of the pit 1. The two sliders 10 are slidably connected to the main frame along the width of the pit 1. To improve the strength of the hoisting trolley, connecting ribs can be set between the lifting rods 8 and the lifting frame 9.

[0022] The main frame includes two small crossbeams 11, two small longitudinal beams 12, and two positioning bolts 13. The two small crossbeams 11 and two small longitudinal beams 12 are symmetrically arranged and fixed together to form a U-shaped frame structure. Two symmetrical sliding grooves are opened on opposite sides of the two small crossbeams 11, and two sliders 10 in the hoisting trolley are slidably connected within these grooves. Two positioning screws 13 pass through the two small crossbeams 11 and are threadedly connected to threaded holes on the two sliders 10 in one of the hoisting trolleys. The positioning bolts 13 are typically connected to the sliders 10 in the hoisting trolley located in the middle. By fixing the position of one of the hoisting trolleys relative to the main frame, and using a three-section tie rod 7 to connect two adjacent U-shaped steel molds 2, the position of the entire integrated steel mold relative to the main frame can be fixed after assembly. Furthermore, when it is necessary to adjust the distance between adjacent U-shaped steel molds 2, only the overall length of the three-section tie rod 7 needs to be adjusted.

[0023] The mobile gantry hoisting mechanism includes a gantry frame and a moving component. The gantry frame includes a horizontal beam 18, columns 19, and longitudinal beams 20. Two horizontal beams 18 span the width of the pit 1 and are symmetrically arranged along the length of the pit 1. Four columns 19 are provided, and several longitudinal beams 20 are provided. The four columns 19 are symmetrically fixedly connected to the two ends of the two horizontal beams 18. Several longitudinal beams 20 are evenly fixedly connected between the two columns 19 symmetrically arranged along the length of the pit 1. The moving component includes track wheels 21 and tracks 22. Two tracks 22 are provided, and the two tracks 22 are parallel and symmetrically arranged on the ground on both sides of the width of the pit 1. Four track wheels 21 are provided, and the four track wheels 21 are respectively installed at the bottom of the four columns 19. The four track wheels 21 are rotatably connected to the two tracks 22.

[0024] The mobile gantry hoisting mechanism also includes: a fixing component, of which four are provided. The four fixing components are respectively set on the lower part of the outer wall of the four columns 19. The fixing component includes: an L-shaped connecting plate 23 and a ground nail 24. The vertical part of the L-shaped connecting plate 23 is fixedly connected to the lower part of the outer wall of the column 19, and the ground nail 24 vertically penetrates the horizontal part of the L-shaped connecting plate 23 and is inserted into the soil below the ground. The fixing component can fix the position of the gantry hoist after it is moved to a suitable position, so as to ensure the accuracy of construction.

[0025] The lifting assembly includes: a lower lifting seat 14, an upper lifting seat 15, a hydraulic jack 16, and guide rods 17. The lower lifting seat 14 is fixedly connected to the top center of two small crossbeams 11. Two sliding grooves are symmetrically opened on one side of the two large crossbeams 18 facing each other. The two ends of the upper lifting seat 15 are slidably connected to the two sliding grooves along the width direction of the pit 1. The fixed end of the hydraulic jack 16 is fixedly installed at the bottom center of the upper lifting seat 15, and the telescopic end of the hydraulic jack 16 is fixedly installed at the top center of the lower lifting seat 14. Two guide rods 17 are symmetrically arranged on both sides of the hydraulic jack 16 along the length direction of the pit 1. The guide rods 17 include: a straight rod and a cylindrical rod. The upper end of the cylindrical rod is fixedly connected to the bottom end of the upper lifting seat 15, and the lower end of the straight rod is fixedly connected to the top of the lower lifting seat 14. The straight rod is vertically slidably connected to the cylindrical rod.

[0026] The position adjustment assembly includes: top plate 1 25, top plate 26, connecting ear 27, bearing seat 28, bearing 29, screw 30, and servo motor 31. Top plate 1 25 and top plate 26 are respectively fixedly installed on both sides of the top of the portal frame. The connecting ear 27 is fixedly connected to the middle of the top of the upper hanging seat 15. There are two sets of bearing seats 28 and bearing 29. The two sets of bearing seats 28 are respectively fixedly installed on the top of top plate 1 25 and top plate 26. The screw 30 passes through the two bearing seats 28 along the width direction of the pit 1 and is rotatably installed on the two bearing seats 28 through the two sets of bearings 29. One end of the screw 30 is fixedly connected to the output shaft of the servo motor 31. The servo motor 31 is fixedly installed on the top of top plate 26. By driving the screw 30 to rotate through the servo motor 31, the upper hanging seat 15 can be moved along the width direction of the pit 1 through the connecting ear 27, thereby realizing the position adjustment of the integrated steel formwork along the width direction of the pit 1.

[0027] A method for constructing dense drainage ditches in industrial plants includes the following steps: Step 1: Measure and lay out the lines to determine the center line and edge line of the drainage ditch to be constructed; excavate foundation pit 1 and prepare the foundation. Step 2: Fabricate U-shaped steel mold 2 and end steel mold 5 according to the design drawings. The height and width of U-shaped steel mold 2 are determined according to the depth and width of the drainage ditch to be constructed, and the height and width of end steel mold 5 are determined according to the depth and width of the foundation pit 1. Apply release agent to the contact surfaces of U-shaped steel mold 2 and concrete, and the contact surfaces of end steel mold 5 and concrete. Step 3: Fabricate and assemble a movable formwork hoisting construction system consisting of a mobile gantry hoisting mechanism, a position adjustment component, a lifting component, a main frame, and several hoisting trolleys; install the two rails 22 of the mobile gantry hoisting mechanism parallel to each other on the ground on both sides of the width of the foundation pit 1, ensuring that the two rails 22 are at the same horizontal height; place the four track wheels 21 of the mobile gantry hoisting mechanism on the two rails 22; Step 4: At the construction site, assemble several U-shaped steel molds 2 into an integrated steel mold using several three-section tie rods 7; Step 5: Hoist the integrated steel mold assembled in Step 4 into the foundation pit 1, and fix the top of several U-shaped steel molds 2 to the bottom of several hoisting trolleys with bolts. Step Six: Lift the integrated steel formwork to the design elevation using the lifting assembly, and adjust the position of the integrated steel formwork using the position adjustment assembly; then install the end steel formwork 5 to the end of the integrated steel formwork facing the construction direction using several through-thread tie rods 4, and set a sealing strip on the contact surface between the end steel formwork 5 and the U-shaped steel formwork 2, and install diagonal bracing 6 between the outer side of the end steel formwork 5 and the bottom of the foundation pit; Step 7: Pour concrete in layers, and use an immersion vibrator to compact the concrete; smooth and finish the concrete surface. Step 8: Once the concrete reaches the demolding strength, loosen the nuts 4-2 on the outside of several through-thread tie rods 4, and remove the end steel mold 5; then remove the end screws 7-3 at both ends of several three-section tie rods 7; operate the lifting assembly to lift the integrated steel mold; and reassemble several U-shaped steel molds 2 into an integrated steel mold through several three-section tie rods 7, and push the mobile gantry hoisting mechanism to the next construction section; Step 9: Repeat steps 6 through 8 until the drainage ditch construction is completed.

[0028] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the technical solution of the present invention, based on the technical essence of the present invention, shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A construction device for dense drainage ditches in industrial plants, comprising: The foundation pit (1) is characterized by further comprising: a movable gantry hoisting mechanism and several U-shaped steel molds (2), through-wire tie rods (4), and three-section tie rods (7), wherein several U-shaped steel molds (2) are arranged side by side along the width direction of the foundation pit (1), and two adjacent U-shaped steel molds (2) are detachably fixedly connected by several three-section tie rods (7); one end of several U-shaped steel molds (2) facing the construction direction is detachably fixedly connected to an end steel mold (5) by several through-wire tie rods (4), and the top end of the U-shaped steel molds (2) is fixed. The main frame is connected to a hoisting trolley, and the upper ends of several hoisting trolleys are respectively installed inside the main frame. One hoisting trolley is fixedly connected to the main frame, and the other hoisting trolleys can slide on the main frame along the width direction of the pit (1). The mobile gantry hoisting mechanism spans both sides of the width direction above the pit (1) and can move along the length direction of the pit (1). The mobile gantry hoisting mechanism is equipped with a lifting component for driving the main frame to rise and fall vertically and a position adjustment component for driving the main frame to adjust its position along the width direction of the pit (1).

2. The construction device for dense drainage ditches in industrial plants according to claim 1, characterized in that: The U-shaped steel mold (2) has several steel mold inner support plates (3) fixedly connected at equal intervals inside. The steel mold inner support plates (3) are fixed perpendicularly to the inner wall of the U-shaped steel mold (2). The through-thread tie rod (4) includes: through-thread rod (4-1), nut one (4-2) and nut two (4-3). There are two nuts one (4-2). The through-thread rod (4-1) passes through the end steel mold (5) and the steel mold inner support plate (3) on the side close to the end steel mold (5). Two nuts one (4-2) are threadedly connected to the two ends of the end steel mold (5) and the steel mold inner support plate (3) opposite to each other. The nut two (4-3) is coaxially fixedly connected to the middle of the through-thread rod (4-1) and located between the end steel mold (5) and the steel mold inner support plate (3).

3. The construction device for dense drainage ditches in industrial plants according to claim 1, characterized in that: The three-section tie rod (7) includes: a middle screw (7-1), a tapered sleeve (7-2), an end screw (7-3), and a nut (7-4). There are two tapered sleeves (7-2), two end screws (7-3), and two nuts (7-4). The small ends of the two tapered sleeves (7-2) are threaded to both ends of the middle screw (7-1), and one end of the two end screws (7-3) is threaded to the large ends of the two tapered sleeves (7-2). The two end screws (7-3) pass through the adjacent ends of the two U-shaped steel molds (2) and are threaded to the two nuts (7-4) inside the two U-shaped steel molds (2).

4. The construction device for dense drainage ditches in industrial plants according to claim 1, characterized in that: The hoisting trolley includes: a hoisting rod (8), a hoisting frame (9), and a slider (10). There are four hoisting rods (8). The hoisting frame (9) is a H-shaped frame structure. The upper ends of the four hoisting rods (8) are vertically fixed to the four corners of the bottom end of the hoisting frame (9). The lower ends of the four hoisting rods (8) are detachably fixed to the top of the U-shaped steel mold (2). There are two sliders (10). The two sliders (10) are symmetrically fixed to the two ends of the hoisting frame (9) located in the length direction of the pit (1). The two sliders (10) are slidably connected to the main frame along the width direction of the pit (1).

5. The construction device for dense drainage ditches in industrial plants according to claim 4, characterized in that: The main frame includes: small crossbeams (11), small longitudinal beams (12) and positioning bolts (13). There are two of each of the small crossbeams (11), small longitudinal beams (12) and positioning bolts (13). The two small crossbeams (11) and the two small longitudinal beams (12) are symmetrically arranged and enclosed to form a U-shaped frame structure. Two sliding grooves are symmetrically opened on the opposite side of the two small crossbeams (11). The two sliders (10) in the hoisting trolley are slidably connected in the two sliding grooves. The two positioning screws (13) pass through the two small crossbeams (11) and are threadedly connected to the threaded holes opened on the two sliders (10) in one of the hoisting trolleys.

6. The construction device for dense drainage ditches in industrial plants according to claim 5, characterized in that: The movable gantry hoisting mechanism includes: a gantry frame and a moving component. The gantry frame includes: a large horizontal beam (18), columns (19), and large longitudinal beams (20). Two large horizontal beams (18) span the two ends of the width direction of the foundation pit (1) and are symmetrically arranged along the length direction of the foundation pit (1). Four columns (19) are arranged, and several large longitudinal beams (20) are arranged. The four columns (19) are symmetrically fixedly connected to the two ends of the two large horizontal beams (18) along the length direction of the foundation pit (1). A number of large longitudinal beams (20) are uniformly fixedly connected between two symmetrical columns (19); the moving component includes: track wheels (21) and tracks (22). There are two tracks (22), which are parallel and symmetrically arranged on the ground on both sides of the width direction of the pit (1); there are four track wheels (21), which are respectively installed at the bottom of the four columns (19) and are respectively rolled on the two tracks (22).

7. The construction device for dense drainage ditches in industrial plants according to claim 6, characterized in that: The mobile gantry hoisting mechanism further includes: a fixing component, of which four fixing components are provided, and the four fixing components are respectively set on the lower part of the outer wall of the four columns (19). The fixing component includes: an L-shaped connecting plate (23) and a ground nail (24). The vertical part of the L-shaped connecting plate (23) is fixedly connected to the lower part of the outer wall of the column (19), and the ground nail (24) vertically penetrates the horizontal part of the L-shaped connecting plate (23) and is inserted into the soil below the ground.

8. The construction device for dense drainage ditches in industrial plants according to claim 6, characterized in that: The lifting assembly includes: a lower lifting seat (14), an upper lifting seat (15), a hydraulic jack (16), and a guide rod (17). The lower lifting seat (14) is fixedly connected to the middle of the top of two small crossbeams (11). Two sliding grooves are symmetrically opened on one side of the two large crossbeams (18). The two ends of the upper lifting seat (15) are slidably connected in the two sliding grooves along the width direction of the pit (1). The fixed end of the hydraulic jack (16) is fixedly installed on the upper lifting seat (15). At the bottom center of the hydraulic jack (16), the telescopic end of the hydraulic jack (16) is fixedly installed at the top center of the lower hanging seat (14); two guide rods (17) are symmetrically arranged on both sides of the hydraulic jack (16) along the length direction of the pit (1). The guide rods (17) include: a straight rod and a cylindrical rod. The upper end of the cylindrical rod is fixedly connected to the bottom end of the upper hanging seat (15), and the lower end of the straight rod is fixedly connected to the top end of the lower hanging seat (14). The straight rod is vertically slidably connected inside the cylindrical rod.

9. The construction device for dense drainage ditches in industrial plants according to claim 8, characterized in that: The position adjustment assembly includes: top plate one (25), top plate two (26), connecting ear (27), bearing seat (28), bearing (29), screw (30) and servo motor (31). Top plate one (25) and top plate two (26) are respectively fixedly installed on both sides of the top of the portal frame. The connecting ear (27) is fixedly connected to the middle of the top of the upper hanging seat (15). There are two sets of bearing seats (28) and bearings (29). The two sets of bearing seats (28) are respectively fixedly installed on the top of top plate one (25) and top plate two (26). The screw (30) passes through the two bearing seats (28) along the width direction of the pit (1) and is rotatably installed on the two bearing seats (28) through the two sets of bearings (29). One end of the screw (30) is fixedly connected to the output shaft of the servo motor (31). The servo motor (31) is fixedly installed on the top of top plate two (26).

10. A method for constructing dense drainage ditches in industrial plants, using the construction device described in any one of claims 1 to 9, characterized in that: Includes the following steps: Step 1: Measure and lay out the lines to determine the center line and edge line of the drainage ditch to be constructed; excavate the foundation pit (1); Step 2: Make U-shaped steel mold (2) and end steel mold (5) according to the design drawings. The height and width of the U-shaped steel mold (2) are determined according to the depth and width of the drainage ditch to be constructed, and the height and width of the end steel mold (5) are determined according to the depth and width of the foundation pit (1). Apply release agent to the contact surface between the U-shaped steel mold (2) and the concrete and the contact surface between the end steel mold (5) and the concrete. Step 3: Fabricate and assemble a movable formwork hoisting construction system consisting of a movable gantry hoisting mechanism, a position adjustment component, a lifting component, a main frame, and several hoisting trolleys; install the two rails (22) of the movable gantry hoisting mechanism parallel to each other on the ground on both sides of the width direction of the foundation pit (1), and ensure that the horizontal height of the two rails (22) is the same; place the four track wheels (21) of the movable gantry hoisting mechanism on the two rails (22); Step 4: At the construction site, assemble several U-shaped steel molds (2) into an integrated steel mold using several three-section tie rods (7); Step 5: Hoist the integrated steel mold assembled in Step 4 into the foundation pit (1), and fix the top of several U-shaped steel molds (2) to the bottom of several hoisting trolleys respectively by bolts; Step 6: Lift the integrated steel mold to the design elevation using the lifting assembly, and adjust the position of the integrated steel mold using the position adjustment assembly; then install the end steel mold (5) to the end of the integrated steel mold facing the construction direction using several through-thread tie rods (4), and set a sealing strip on the contact surface between the end steel mold (5) and the U-shaped steel mold (2); Step 7: Pour concrete in layers, and use an immersion vibrator to compact the concrete; smooth and finish the concrete surface. Step 8: Once the concrete reaches the demolding strength, loosen the nuts (4-2) on the outside of several through-thread tie rods (4) and remove the end steel mold (5); then remove the end screws (7-3) at both ends of several three-section tie rods (7); operate the lifting assembly to lift the integrated steel mold; and reassemble several U-shaped steel molds (2) into an integrated steel mold through several three-section tie rods (7), and push the mobile gantry hoisting mechanism to the next construction section; Step 9: Repeat steps 6 through 8 until the drainage ditch construction is completed.

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