Hoisting device for concrete water filter pipe

Abstract

The invention provides a hoisting device for a concrete water filter pipe, and relates to the technical field of building construction. The main lifting rod is arranged on the lifting bracket in a lifting manner in the vertical direction; the lifting mechanism is arranged on the hoisting support and used for controlling the main hoisting rod to ascend and descend; the multiple movable rods are uniformly arranged around the peripheral side of the main lifting rod in the vertical direction; the expansion mechanism is arranged between the movable rods and the main suspender and used for driving the multiple movable rods to move close to or away from the main suspender synchronously; wherein the movable rods are arranged in the range of the two sections of water filter pipes through the lifting mechanism, and the multiple movable rods are attached to the inner walls of the water filter pipes through the expansion mechanism at the same time, so that the staggered water filter pipes are coaxially positioned under the pushing of the movable rods. The device has the effect of facilitating hoisting, positioning and adjusting of the concrete water filter pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a hoisting device for a concrete filter pipe. BACKGROUND

[0002] In modern urban foundation pit engineering, especially in areas with high groundwater level, it is often necessary to set up dewatering wells to lower the groundwater level and ensure construction safety. The installation quality of the concrete filter pipe, as the core component of the dewatering well, directly affects the dewatering effect and the stability of the foundation pit. However, due to the dense urban building environment, the construction space is often extremely narrow, and large hoisting equipment such as cranes or hoists cannot be deployed for operation, so small and flexible hoisting devices are needed to complete the installation of the filter pipe.

[0003] Currently, for the hoisting of a concrete filter pipe in a narrow space, a temporary support is usually set up on site, and a winch is installed on the support. The filter pipe is hoisted in sections by a traction rope, and then assembled from the bottom to the top of the dewatering well. The positions of adjacent filter pipes are adjusted manually to position the multiple filter pipes coaxially.

[0004] However, the above method has obvious defects: first, due to the lack of precise guiding and limiting structures, the two filter pipes are prone to radial misalignment when connected, and the narrow well space makes it extremely difficult to adjust the misalignment, seriously affecting the construction efficiency; second, manual adjustment is not only time-consuming and labor-intensive, but repeated adjustments may cause wear and tear of the filter pipe joints, and even affect the sealing and overall stability of the dewatering well. SUMMARY

[0005] To solve the problem of difficult correction of transverse misalignment during hoisting of multiple filter pipes, the present application provides a hoisting device for a concrete filter pipe.

[0006] The hoisting device for a concrete filter pipe provided by the present application adopts the following technical solution: A hoisting device for a concrete filter pipe, comprising: a hoisting support installed at the mouth of a dewatering well; a main hoisting rod vertically and liftably arranged on the hoisting support; a lifting mechanism arranged on the hoisting support for controlling the lifting of the main hoisting rod; a plurality of movable rods evenly arranged around the periphery of the main hoisting rod in the vertical direction; an expansion mechanism arranged between the movable rods and the main hoisting rod for driving the plurality of movable rods to move synchronously towards or away from the main hoisting rod; The movable rods are placed in the range of the two sections of the water filtering pipes through the lifting mechanism, and the movable rods are simultaneously attached to the inner wall of the water filtering pipes through the expansion mechanism, so that the misaligned water filtering pipes are coaxially positioned under the pushing of the movable rods.

[0007] Further, the expansion mechanism comprises: A fixed disc is fixedly arranged on the main hoist rod, and a plurality of limiting grooves for limiting the movable rods are formed in the circumferential side of the fixed disc. An active disc is vertically slidably arranged on the main hoist rod and located above the fixed disc. A plurality of connecting rods are uniformly arranged around the circumferential side of the main hoist rod, one end of each connecting rod is hingedly connected with a movable rod, the other end is hingedly connected with the active disc, the middle part abuts against the fixed disc and the two sides are limited in the limiting grooves. An expansion drive is used to drive the active disc to move close to or away from the fixed disc.

[0008] Further, the expansion mechanism is arranged in two groups along the length direction of the main hoist rod, one group is connected with the top end of the movable rod, and the other group is connected with the middle part of the movable rod.

[0009] Further, the expansion drive comprises a plurality of tension springs, the tension springs are arranged between the fixed disc and the active disc, one end of each tension spring is connected with the fixed disc, and the other end is connected with the active disc. The expansion drive further comprises a counterweight, a synchronous connecting rod, a contraction traction rope and a contraction winding rope assembly, the counterweight is fixedly arranged at the bottom of the fixed disc, the synchronous connecting rod penetrates through the fixed disc and is connected with a plurality of active discs, one end of the contraction traction rope is connected with the active disc, and the other end is connected with the contraction winding rope assembly, and the contraction winding rope assembly is used to pull or release the contraction traction rope.

[0010] Further, an installation groove is formed in the side wall close to the bottom of the movable rod, a supporting mechanism for supporting the bottom of the water filtering pipe is arranged in the installation groove, and a bearing frame for placing the water filtering pipe is slidably arranged at the bottom of the hoisting support.

[0011] Further, the supporting mechanism comprises a supporting hook and a reset torsion spring, one end of the supporting hook is rotatably arranged in the installation groove, one end of the reset torsion spring is connected with the inner wall of the installation groove, and the other end is connected with the supporting hook, and when the reset torsion spring is in a natural state, the supporting hook protrudes from the side wall of the movable rod. The bearing frame comprises two parallel sliding rods, and the sliding rods are slidably arranged on the hoisting support in a direction perpendicular to the length of the sliding rods.

[0012] Further, a friction plate is arranged on the side of the movable rod away from the main hoist rod.

[0013] Further, the bottom of the movable rod is provided with an arc-shaped rod, and the inner arc surface of the arc-shaped rod is arranged towards the main hoisting rod.

[0014] Further, the lifting mechanism comprises a lifting traction rope and a lifting rope winding assembly, one end of the lifting traction rope is connected with the top of the main hoisting rod, and the other end is connected with the lifting rope winding assembly, and the lifting rope winding assembly is used for pulling or releasing the lifting traction rope. The lifting rope winding assembly comprises a rope winding support, a roller, a first rotating shaft, a second rotating shaft, a first gear, a second gear, a driving handle and a locking assembly, the rope winding support is fixedly installed at the bottom of the hoisting support, the roller is rotationally connected with the rope winding support through the first rotating shaft, the first gear is coaxially fixedly connected with the first rotating shaft, the second gear is rotationally connected with the rope winding support through the second rotating shaft, the first gear is engaged with the second gear and the diameter of the first gear is greater than that of the second gear, the driving handle is fixedly connected with the second rotating shaft, and the locking assembly is used for locking the second rotating shaft.

[0015] Further, the locking assembly comprises a third gear and a locking rod, the third gear is coaxially fixedly connected with the second rotating shaft, one end of the locking rod is rotationally connected with the rope winding support, and the other end is a movable end, the movable end of the locking rod is provided with a clamping portion, and in a natural state, the clamping portion is embedded in the tooth gap of the third gear under the action of gravity.

[0016] In summary, the present application has at least one of the following beneficial technical effects: 1. By arranging a plurality of vertical movable rods around the side of the main hoisting rod, a section of the filter pipe is hoisted to the lower filter pipe, the main hoisting rod is lowered into the range of the two sections of the filter pipe through the lifting mechanism, the plurality of movable rods are driven to move away from the main hoisting rod synchronously through the expansion mechanism, the plurality of movable rods are expanded, and the misaligned filter pipe is pushed to move radially, so that the two sections of the filter pipe are coaxially positioned when all the movable rods are in contact with the inner walls of the two sections of the filter pipe, thereby solving the problem that the misaligned filter pipe is difficult to adjust and position due to the narrow space of the precipitation well, facilitating the hoisting and positioning of the filter pipe, and greatly improving the construction efficiency of the hoisting and assembly of the multi-section filter pipe. 2. By using a plurality of tension springs as driving force, the movable disc is driven to move close to the fixed disc, the connecting rod drives the plurality of movable rods to expand outward under the abutment of the fixed disc, the movable disc is driven to move away from the fixed disc by pulling the contraction traction rope, the plurality of movable rods are driven to contract inward under the action of gravity, and the expansion or contraction of the movable rods can be realized by controlling the contraction traction rope during hoisting work, so that the control is simple and the on-site construction efficiency is improved.

[0017] 3. Two slide rods are set as bearing frames by sliding, which can adapt to water filter pipes with different diameters, and the water filter pipes with different diameters can be supported by setting a supporting mechanism at the bottom of the movable rod and expanding the movable rod, so that the application has wide applicability and high flexibility.

[0018] 4. The lifting rope is wound by rotating the driving handle to drive the roller, and the power saving effect of the first gear and the second gear is set to realize manual driving, adapt to the working environment of the construction site, and cooperate with the third gear and the locking rod to lock the roller, so as to fix the main suspender at a certain height, and conveniently coaxially position and adjust the misaligned water filter pipe. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the application.

[0021] Figure 2 It is a schematic diagram of the expansion structure of the embodiment of the application.

[0022] Figure 3 It is a schematic diagram of another view of Figure 2 .

[0023] Figure 4 It is a schematic diagram of the bottom end of the movable rod of the embodiment of the application.

[0024] Figure 5 It is an enlarged schematic diagram of part A in Figure 4 .

[0025] Figure 6 It is a schematic diagram of the hoisting water filter pipe of the embodiment of the application.

[0026] Figure 7 It is a schematic diagram of the lifting mechanism of the embodiment of the application.

[0027] The drawings are as follows: 1, hoisting support; 11, bottom frame; 12, inclined brace; 13, top rod; 14, sliding groove; 2, main hoist; 21, main lifting lug; 3, lifting mechanism; 31, lifting traction rope; 32, rope winding support; 33, roller; 34, first rotating shaft; 35, second rotating shaft; 36, first gear; 37, second gear; 38, driving handle; 39, locking assembly; 391, third gear; 392, locking rod; 4, movable rod; 41, arc-shaped rod; 42, mounting groove; 43, friction plate; 5, expansion mechanism; 51, fixed disc; 511, limiting groove; 52, movable disc; 521, auxiliary lifting lug; 53, connecting rod; 54, expansion drive; 541, tension spring; 542, counterweight; 543, synchronous connecting rod; 544, contraction traction rope; 545, contraction rope winding assembly; 6, supporting mechanism; 61, supporting hook; 62, reset torsional spring; 7, carrying frame; 71, sliding rod; 8, water filter pipe. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] The embodiments of the present application disclose a hoisting device for a concrete water filter pipe. Referring to Figure 1 , the hoisting device for the concrete water filter pipe comprises: The hoisting support 1 is installed at the well mouth. The main hoist 2 is arranged on the hoisting support 1 in a vertical direction and is liftable. The lifting mechanism 3 is arranged on the hoisting support 1 and is used for controlling the lifting of the main hoist 2. The movable rod 4 is arranged around the circumferential side of the main hoist 2 in a vertical direction and a plurality of movable rods 4 are evenly arranged. The expansion mechanism 5 is arranged between the movable rod 4 and the main hoist 2 and is used for driving the plurality of movable rods 4 to move synchronously close to or away from the main hoist 2. The movable rod 4 is placed into the range of the two sections of the water filter pipe 8 by the lifting mechanism 3, and the plurality of movable rods 4 are simultaneously attached to the inner wall of the water filter pipe 8 by the expansion mechanism 5, so that the misaligned water filter pipe 8 is coaxially positioned under the pushing of the movable rod 4.

[0030] When the two misaligned filter pipes 8 are coaxially positioned, the main hoist 2 is hoisted to the range of the two filter pipes 8 by the lifting mechanism 3, the middle part of the movable rod 4 is located at the connection position of the two filter pipes 8, the multiple movable rods 4 are controlled to move away from the main hoist 2 by the expansion mechanism 5, the multiple movable rods 4 are synchronously expanded outward, until all the movable rods 4 are attached to the inner wall of the filter pipe 8, to push the misaligned filter pipe 8 to move laterally, realize the coaxial positioning of the two filter pipes 8, solve the technical problem that the position of the filter pipe 8 in the precipitation well is difficult to adjust, and greatly improve the convenience of the filter pipe 8 on-site construction.

[0031] Specifically, as shown in Figure 1 The lifting support 1 includes a bottom frame 11, inclined braces 12 and a top rod 13. The bottom frame 11 is a rectangular frame formed by four rods. The four inclined braces 12 are connected at one end to a corner of the bottom frame 11 and at the other end to the top rod 13. The bottom frame 11, the inclined braces 12 and the top rod 13 form a triangular prism frame, which is stable and convenient for temporary on-site construction.

[0032] As shown in Figure 2 and Figure 3 The expansion mechanism 5 includes a fixed disc 51, a movable disc 52, connecting rods 53 and an expansion drive 54.

[0033] The fixed disc 51 is an octagonal plate, and the main hoist 2 penetrates the center of the fixed disc 51 and is welded and fixed to the fixed disc 51. The movable disc 52 is a shaped plate of the fixed disc 51, which is vertically slidably arranged on the main hoist 2 and located above the fixed disc 51. In this embodiment, the movable rod 4 is provided with four connecting rods 53, and the connecting rods 53 are also provided with four connecting rods 53. One end of the connecting rod 53 is hinged to the side wall of the movable disc 52, and the other end is hinged to the movable rod 4. The expansion drive 54 drives the movable disc 52 to move towards or away from the fixed disc 51, so that the movable disc 52 carries the four connecting rods 53 to move.

[0034] When the four connecting rods 53 are synchronously lowered with the movable disc 52, the angle between the connecting rod 53 and the main hoist 2 gradually increases under the abutment of the movable disc 52, thereby driving the four movable rods 4 to synchronously expand, realizing the expansion of the movable rod 4, so as to facilitate the coaxial positioning of the filter pipe 8. When the four connecting rods 53 are synchronously raised with the movable disc 52, the angle between the connecting rod 53 and the main hoist 2 gradually decreases under the action of gravity, thereby driving the four movable rods 4 to synchronously contract, realizing the contraction of the movable rod 4, so as to facilitate the placement of the device into the filter pipe 8 and the free lifting in the filter pipe 8.

[0035] In order to prevent the rotating of the movable disc 52, causing the movable rod 4 to rotate around the main hoist 2, the circumferential side of the fixed disc 51 is provided with four limiting grooves 511, the opening of the limiting groove 511 is towards the outside of the fixed disc 51, and the two sides of the connecting rod 53 are limited within the range of the limiting groove 511, so that the movable rod 4 cannot swing around the fixed rod at will, and the stability of the movable rod 4 is improved. Moreover, in order to reduce the wear between the fixed disc 51 and the connecting rod 53, the bottom wall (the side away from the opening) of the limiting groove 511 is provided as an outward convex arc surface, so that the abutting point between the connecting rod 53 and the fixed disc 51 is always on the arc surface, thereby effectively reducing the wear between the connecting rod 53 and the fixed disc 51.

[0036] In order to make the movable rod 4 reliably abut against the inner wall of the water filtering pipe 8, the side of the movable rod 4 away from the main hoist 2 is provided with a friction plate 43, the friction plate 43 is made of rubber or leather material, and the outer side of the friction plate 43 is provided as an outward convex arc surface. The friction plate 43 is provided to increase the friction between the water filtering pipe 8 and the movable rod 4, and the tension spring 541 always drives the movable rod 4 to abut against the inner wall of the water filtering pipe 8, so that the water filtering pipe 8 is difficult to move longitudinally when it is suspended, and the stability of the water filtering pipe 8 during hoisting is improved.

[0037] Further, the expansion mechanism 5 is arranged in two groups along the length direction of the main hoist 2, one group is connected to the top end of the movable rod 4, and the other group is connected to the middle part of the movable rod 4, as shown in Figure 2 The structure size specifications of the two groups of expansion mechanisms 5 are the same, the top and middle parts of the movable rod 4 are respectively provided with two hinge points, so that the connecting rods 53 of the two groups of expansion mechanisms 5 are respectively hinged thereto, according to the parallelogram feature, the connecting rods 53 connected to the movable rod 4 are in a vertical direction at the end close to the movable disc 52, so that the movable rod 4 can always maintain a vertical state, thereby avoiding the movable rod 4 from swinging at will, and improving the stability of the device during operation.

[0038] Specifically, the expansion drive 54 includes a tension spring 541, a contraction traction rope 544, and a contraction winding rope assembly 545. In this embodiment, two tension springs 541 are arranged between the fixed disc 51 and the movable disc 52, the two ends of the tension spring 541 are respectively connected to the fixed disc 51 and the movable disc 52 through the hangers, the tension spring 541 pulls the movable disc 52 to move downward by its own elastic force, and the expansion of the movable rod 4 is realized. The top of the upper movable disc 52 is provided with a secondary hanger 521, one end of the contraction traction rope 544 is connected to the secondary hanger 521, and the other end is connected to the contraction winding rope assembly 545, the contraction winding rope assembly 545 winds the contraction traction rope 544, thereby pulling the movable disc 52 to move upward, and the contraction of the movable rod 4 is realized. The contraction winding rope assembly 545 has the same structure principle as the lifting mechanism 3, which will be described in detail later.

[0039] In order to make the two movable discs 52 move synchronously to ensure the vertical state of the movable rod 4, a synchronous connecting rod 543 is arranged between the two movable discs 52, and in order to balance the weight and make the center of gravity of the device located on the main hoist 2, the synchronous connecting rod 543 is vertically and symmetrically provided with two, as shown in Figure 3 The two ends of the synchronous connecting rod 543 are fixedly connected with the two movable discs 52 respectively through bolts, and the middle part penetrates the fixed disc 51 and can freely move vertically.

[0040] In order to further improve the stability of the device, the fixed disc 51 is provided with a counterweight 542 at the bottom, which is semispherical in this embodiment and coaxial with the main hoist 2. By arranging the counterweight 542, when the contraction traction rope 544 pulls the movable disc 52, it can only pull the movable disc 52 alone, and the main hoist 2 and the fixed disc 51 can be stably suspended, so as not to pull the whole device upward. And the existence of the counterweight 542 makes the allowable tension of the tension spring 541 increase, thereby improving the pushing force of the movable rod 4 on the filter pipe 8 when it expands, and improving the positioning efficiency of the filter pipe 8.

[0041] On the other hand, the device needs to be able to adapt to the lifting of filter pipes 8 of different diameters. By arranging the supporting mechanism 6 on the side of the movable rod 4 close to the bottom end, cooperating with the expansion of the movable rod 4, the bottom of the filter pipe 8 of different diameters can be supported.

[0042] Specifically, as shown in Figure 4 and Figure 5 A mounting groove 42 is formed on the side wall of the movable rod 4 close to the bottom, and the mounting groove 42 is internally provided with a supporting mechanism 6 for supporting the bottom of the filter pipe 8. As shown in Figure 1 The bottom of the hoisting support 1 is provided with a bearing frame 7 for placing the filter pipe 8 before hoisting.

[0043] The bearing frame 7 includes two parallel sliding rods 71, and the bottom frame 11 of the hoisting support 1 is provided with a sliding groove 14 near the two ends of the sliding rod 71, and the sliding rod 71 is vertically arranged on the bottom frame 11 of the hoisting support 1 through the limiting of the sliding groove 14.

[0044] Before hoisting, the main hoisting rod 2 is lifted to the highest point, the distance between the two slide rods 71 is adjusted according to the diameter of the filter pipe 8, the filter pipe 8 is vertically placed on the two slide rods 71, and the distance between the two slide rods 71 is expanded as much as possible, thereby reducing the influence of the slide rod 71 on the contact of the supporting mechanism 6 with the bottom of the filter pipe 8. Then, by lowering the height of the main hoisting rod 2, the supporting mechanism 6 is located below the bottom of the filter pipe 8, the expansion mechanism 5 controls the synchronous expansion of the movable rod 4, the movable rod 4 is attached to the inner wall of the filter pipe 8, the main hoisting rod 2 is lifted again, the supporting mechanism 6 is in contact with the bottom of the filter pipe 8, and the filter pipe 8 is supported, and the movable rod 4 is expanded outward, which can keep the stable support of the filter pipe 8 at any time; further lifting the main hoisting rod 2, the filter pipe 8 is separated from the slide rod 71, the slide rod 71 is slid, the distance between the two slide rods 71 allows the filter pipe 8 to pass, and then the main hoisting rod 2 is lowered, so that the filter pipe 8 is smoothly hoisted into the precipitation well.

[0045] Specifically, as shown in Figure 5 , the supporting mechanism 6 comprises a supporting hook 61, a rotating shaft and a reset torsion spring 62. The supporting hook 61 is a wedge-shaped block, one end of the supporting hook 61 is provided with a rotating shaft sleeve and is rotatably arranged in the mounting groove 42 through the rotating shaft, and the other end is a movable end and can protrude or be received in the accommodating groove. The reset torsion spring 62 is provided with two and is located at the two ends of the supporting hook 61 respectively. One end of the reset torsion spring 62 is connected with the side wall of the mounting groove 42, and the other end is connected with the supporting hook 61. The supporting hook 61 protrudes from the side wall of the movable rod 4 in the natural state of the reset torsion spring 62, and when the movable rod 4 is attached to the inner wall of the filter pipe 8 and rises, the end of the supporting hook 61 abuts against the bottom of the filter pipe 8, and under the extrusion of the filter pipe 8, it rotates downward until it abuts against the lower bottom wall of the mounting groove 42, thereby supporting the bottom of the filter pipe 8. As shown in Figure 6 , the four supporting hooks 61 on the four movable rods 4 support the filter pipe 8 from four directions, thereby greatly improving the stability of the hoisting of the filter pipe 8, and the expansion and contraction of the movable rod 4 can adapt to filter pipes 8 of different diameters, so that the device has high applicability.

[0046] In order to facilitate the lowering of the movable rod 4 into the lower filter pipe 8 after the two filter pipes 8 are initially spliced, the bottom of the movable rod 4 is welded with an arc-shaped rod 41, as shown in Figure 3 and Figure 4 , the inner arc surface of the arc-shaped rod 41 is arranged towards the main hoisting rod 2, and multiple arc-shaped rods 41 can guide the lowering of the movable rod 4, avoiding the hindrance of the top surface of the filter pipe 8 to the lowering of the movable rod 4 due to the transverse misalignment of the two filter pipes 8. On the other hand, as Figure 1As shown, the lifting mechanism 3 comprises a lifting traction rope 31 and a lifting rope winding assembly, the top of the main boom 2 is provided with a main lifting lug 21, the first end of the lifting traction rope 31 is connected to the main lifting lug 21, and the other end is connected to the lifting rope winding assembly through the top rod 13 of the hoisting support 1. In this embodiment, the lifting rope winding assembly and the contraction rope winding assembly 545 adopt the same structure.

[0047] Specifically, as shown in the figure, Figure 7 The lifting rope winding assembly comprises a rope winding support 32, a roller 33, a first rotating shaft 34, a driving handle 38 and a locking assembly 39. The rope winding support 32 is a U-shaped support fixed on the bottom frame 11 of the hoisting support 1 by bolts; the roller 33 is rotatably installed in the inside of the rope winding support 32 through the first rotating shaft 34, and the driving handle 38 is used to drive the first rotating shaft 34 to rotate, so as to drive the roller 33 to wind the lifting traction rope 31. The locking assembly 39 is used to lock the second rotating shaft 35, so that the main driving rod can be stably suspended at any height.

[0048] In order to reduce the difficulty of manually rotating the driving handle 38, a first gear 36 and a second gear 37 are arranged between the first rotating shaft 34 and the driving handle 38, the first gear 36 is coaxially fixedly connected with the first rotating shaft 34, the second gear 37 is rotatably connected with the rope winding support 32 through a second rotating shaft 35, the second rotating shaft 35 is parallel to the first rotating shaft 34, the second gear 37 is engaged with the first gear 36, and the driving handle 38 is coaxially fixedly connected with the second rotating shaft 35. The diameter of the first gear 36 is greater than that of the second gear 37, and when the driving handle 38 is rotated, the first gear 36 and the second gear 37 play a labor-saving role, which facilitates manual operation.

[0049] In addition, as shown in the figure, Figure 7 The locking assembly 39 comprises a third gear 391 and a locking rod 392, the third gear 391 is coaxially fixedly connected with the second rotating shaft 35, the locking rod 392 is located above the third gear 391, one end of the locking rod 392 is rotatably connected with the rope winding support 32, and the other end is a movable end, and the end is provided with a clamping portion, the clamping portion is V-shaped, and forms a Y-shaped rod with the locking rod 392. In the natural state, the locking rod 392 rotates downward under the action of gravity, so that the clamping portion is embedded in the tooth gap of the third gear 391, and the rotation of the third gear 391 is hindered, so that the roller 33 is locked. When it is necessary to rotate the driving handle 38, the locking rod 392 is actuated to make the locking rod 392 separate from the third gear 391, so that the handle can be unlocked.

[0050] The construction process of the hoisting device for the concrete filter pipe according to the embodiment of the present application comprises: Firstly, the hoisting support 1 is erected, so that the top rod 13 of the hoisting support 1 is located directly above the dewatering well; Second step, according to the diameter of the filter pipe 8 to adjust the position of the two slide bars 71, the filter pipe 8 to be hoisted is placed on the slide bars 71, and the slide bars 71 support the position of the bottom edge of the filter pipe 8; Third step, the movable disc 52 is pulled up by the contraction of the contraction traction rope 544 controlled by the contraction rope winding mechanism, and the movable rod 4 is contracted; Fourth step, the main hoisting rod 2 is lowered by the lifting of the lifting traction rope 31 controlled by the lifting rope winding mechanism, and the supporting mechanism 6 at the bottom end of the movable rod 4 is located below the filter pipe 8; at the same time, the contraction traction rope 544 is released by the contraction of the contraction rope winding mechanism, and the descent amplitude of the main hoisting rod 2 is adapted; Fifth step, the contraction traction rope 544 is released by the contraction of the contraction rope winding mechanism, and the movable rod 4 is automatically expanded under the action of the tension spring 541 and adheres to the inner wall of the filter pipe 8; Sixth step, the main hoisting rod 2 is pulled up by the lifting of the lifting traction rope 31 controlled by the lifting rope winding mechanism, and the movable rod 4 adheres to the filter pipe 8 at the same time, the supporting hook 61 adheres to the bottom of the filter pipe 8, and the filter pipe 8 is lifted to separate from the slide bars 71; Seventh step, the slide bars 71 avoid the filter pipe 8, and the main hoisting rod 2 is controlled to descend, so that the filter pipe 8 is suspended into the precipitation well until the supporting hook 61 abuts against the top surface of the filter pipe 8 below; Eighth step, the contraction traction rope 544 is contracted by the contraction of the contraction rope winding mechanism, and the movable disc 52 is pulled up, so that the movable rod 4 is contracted to the main hoisting rod 2, the supporting hook 61 is separated from the filter pipe 8, and the two filter pipes 8 are spliced; Ninth step, the main hoisting rod 2 is released by the lifting of the lifting traction rope 31 controlled by the lifting rope winding mechanism, so that the middle part of the movable rod 4 is aligned with the connection part of the two filter pipes 8; Tenth step, the contraction traction rope 544 is released by the contraction of the contraction rope winding mechanism, and the movable disc 52 is expanded synchronously under the driving of the tension spring 541, so that the two filter pipes 8 are coaxially pushed.

[0051] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A hoisting device for concrete filter pipes, characterized in that, include: The hoisting support is installed at the dewatering wellhead. The main lifting rod is vertically and can be raised and lowered on the lifting support; The lifting mechanism, mounted on the hoisting support, is used to control the lifting and lowering of the main boom; Multiple movable rods are evenly arranged along the vertical direction and around the periphery of the main lifting rod; An expansion mechanism is provided between the movable rod and the main lifting rod, and is used to drive the multiple movable rods to move synchronously closer to or away from the main lifting rod; The movable rod is inserted into the range of the two water filter pipes through a lifting mechanism. Multiple movable rods are simultaneously attached to the inner wall of the water filter pipes through an expansion mechanism, so that the misaligned water filter pipes are coaxially positioned under the push of the movable rods.

2. The hoisting device for concrete filter pipes according to claim 1, characterized in that, The expansion mechanism includes: A fixed plate is fixedly installed on the main lifting rod, and multiple limiting grooves are opened on its periphery for limiting the movement of the rod; The movable plate is vertically slidably mounted on the main lifting rod and located above the fixed plate; Multiple connecting rods are evenly arranged around the periphery of the main lifting rod. One end is hinged to the movable rod, the other end is hinged to the movable disc, the middle part abuts against the fixed disc, and its two sides are restricted in the limiting groove. An expansion drive is used to move the movable disk closer to or away from the fixed disk.

3. The hoisting device for concrete filter pipes according to claim 2, characterized in that, The expansion mechanism is arranged in two sets at intervals along the length of the main lifting rod, one set being connected to the top of the movable rod and the other set being connected to the middle of the movable rod.

4. The hoisting device for concrete filter pipes according to claim 3, characterized in that, The expansion drive includes multiple tension springs, which are disposed between the fixed plate and the movable plate, with one end connected to the fixed plate and the other end connected to the movable plate; The expansion drive also includes a counterweight, a synchronous link, a retractable traction rope, and a retractable winding rope assembly. The counterweight is fixedly installed at the bottom of the fixed disk. The synchronous link passes through the fixed disk and is connected to multiple movable disks. One end of the retractable traction rope is connected to a movable disk, and the other end is connected to the retractable winding rope assembly. The retractable winding rope assembly is used to pull or release the retractable traction rope.

5. The hoisting device for concrete filter pipes according to any one of claims 1, characterized in that, The movable rod has an installation groove on its side wall near the bottom, and a support mechanism for supporting the bottom of the filter pipe is provided in the installation groove. The bottom of the hoisting bracket is slidably provided with a support frame for placing the filter pipe.

6. The hoisting device for concrete filter pipes according to claim 5, characterized in that, The supporting mechanism includes a supporting hook and a return torsion spring. One end of the supporting hook is rotatably disposed inside the mounting groove. One end of the return torsion spring is connected to the inner wall of the mounting groove, and the other end is connected to the supporting hook. When the return torsion spring is in its natural state, the supporting hook protrudes from the side wall of the movable rod. The support frame includes two parallel sliding rods, which are slidably mounted on the hoisting bracket in a direction perpendicular to their own length.

7. The hoisting device for concrete filter pipes according to claim 5, characterized in that, A friction plate is provided on the side of the movable rod away from the main lifting rod.

8. The hoisting device for concrete filter pipes according to claim 5, characterized in that, The bottom of the movable rod is provided with an arc-shaped rod, and the inner arc surface of the arc-shaped rod faces the main lifting rod.

9. The hoisting device for concrete filter pipes according to any one of claims 1-8, characterized in that, The lifting mechanism includes a lifting traction rope and a lifting rope assembly. One end of the lifting traction rope is connected to the top of the main boom, and the other end is connected to the lifting rope assembly. The lifting rope assembly is used to pull or release the lifting traction rope. The lifting rope assembly includes a rope winding bracket, a roller, a first rotating shaft, a second rotating shaft, a first gear, a second gear, a drive handle, and a locking assembly. The rope winding bracket is fixedly installed at the bottom of the hoisting bracket. The roller is rotatably connected to the rope winding bracket via the first rotating shaft. The first gear is coaxially and fixedly connected to the first rotating shaft. The second gear is rotatably connected to the rope winding bracket via the second rotating shaft. The first gear and the second gear mesh, and the diameter of the first gear is larger than that of the second gear. The drive handle is fixedly connected to the second rotating shaft. The locking assembly is used to lock the second rotating shaft.

10. The hoisting device for concrete filter pipes according to claim 9, characterized in that, The locking assembly includes a third gear and a locking rod. The third gear is coaxially and fixedly connected to the second rotating shaft. One end of the locking rod is rotatably connected to the rope winding bracket, and the other end is a movable end. The movable end of the locking rod is provided with a locking part. In its natural state, the locking part is embedded in the tooth gap of the third gear under the action of gravity.

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