A turnover hoist and turnover system for a counter-dumping independent foundation mold

Abstract

The application discloses a mold turning hoist and mold turning system for a reverse pouring type independent foundation mold, relates to the technical field of concrete prefabricated component production, and comprises a mold connecting assembly and a lifting lug seat. The mold connecting assembly comprises a connecting seat, a rotating shaft and a resistance plate which are sequentially connected. The resistance plate comprises a connecting surface and a blocking arc surface which is symmetrically arranged on both sides of the connecting surface. The lifting lug seat is integrally provided with a lifting hole, a movable groove and a limiting groove. The rotating shaft can rotate in the movable groove and freely move along the vertical direction. By adjusting the height of the rotating shaft, the center of gravity is positioned, the rotating shaft is ensured to be in the best turning position, the buffer damping structure of the resistance plate and the limiting groove is combined, kinetic energy is converted into internal energy through the friction of the contact surface, the rotating shaft is jacked up by the limiting groove, the whole foundation mold is lifted, the kinetic energy is rapidly attenuated, the swing range of the foundation mold during the turning process is controlled within a very small range, the safety hidden danger is eliminated, the swing times are reduced, the time for stopping swing is reduced, and the mold turning efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete prefabricated component production, in particular to a mold turning hoist and mold turning system for reverse pouring type independent foundation mold. BACKGROUND

[0002] In the production process of independent foundation prefabrication, the initial pouring process is carried out by using the positive pouring process, but the surface of the independent foundation formed by positive pouring is prone to be full of water bubbles and pores. The root cause of this problem lies in that the upper end section of the independent foundation is small and the lower end section is large during positive pouring, and the water bubbles and pores generated during pouring are restricted by the mold structure and cannot rise smoothly to the surface of the concrete to be discharged, finally remaining in the mold and appearing on the surface of the foundation, which seriously affects the appearance quality and structural performance of the independent foundation.

[0003] To solve the problem of surface defects caused by the positive pouring process, the reverse pouring method is gradually used for independent foundation production in the industry. The reverse pouring process changes the pouring direction, so that the rising channel of the bubbles and water bubbles during pouring gradually widens during the rising process, and finally rises smoothly to the upper surface of the concrete, and after subsequent repair, the pore and water bubble defects on the side wall and surface of the foundation can be effectively eliminated. However, the application of the reverse pouring process has derived a new technical problem-how to safely and stably right the inverted independent foundation after pouring and forming.

[0004] At present, the industry usually realizes the overturning and righting of the independent foundation by welding a turnover shaft on the mold, the position of the turnover shaft is fixed below the center of gravity of the foundation mold, and after lifting the mold to a certain vertical height by means of a lifting ring or a jacking device, the mold rotates around the turnover shaft under the action of gravity until the center of gravity is below the shaft to complete the overturning. For example, the patent number CN214871420U “independent foundation mold turning device” places the independent foundation mold in the support frame, connects the mold turning connecting piece to the independent foundation mold, and then lifts the independent foundation mold by the jacking assembly to turn it over and then drop it down to complete the turning and demolding of the independent foundation. Although this device can realize mold turning, the up and down position of the turnover shaft cannot be adjusted, resulting in a high conversion rate of the gravitational potential energy of the independent foundation mold after turning into kinetic energy, which leads to the safety hazards of large turning swing amplitude of the mold and the disadvantages of frequent stopping and long time consumption. Especially for larger size independent foundations, the total weight of the mold and the internal concrete prefabricated foundation can reach several tons or even more than ten tons, and such heavy load swinging in the air will pose a serious threat to the safety of ground operators and surrounding production equipment, greatly restricting the smooth progress of safe production.

[0005] Therefore, it is a technical problem to be solved in the current concrete prefabricated component production field to develop an independent foundation mold turning device that can effectively control the turning swing amplitude of the independent foundation mold and improve the operation safety. SUMMARY

[0006] In view of the problems of large swing range, prominent safety hazards and poor adaptability of the existing reverse pouring type independent foundation mold turnover device, the application provides a mold turnover lifting appliance and system for a reverse pouring type independent foundation mold, which realizes small swing range and low swing frequency in the foundation mold turnover process through millimeter level shaft structure design and a unique resistance buffer mechanism, fundamentally improves operation safety and stability, and meets the use requirements of different specifications of foundation molds.

[0007] In order to achieve the above-mentioned purpose, the application provides a mold turnover lifting appliance for a reverse pouring type independent foundation mold, which comprises a mold connecting assembly and a lifting ring seat.

[0008] The mold connecting assembly comprises a connecting seat, a shaft and a resistance plate connected in sequence, and the three are synchronously rotated; the connecting seat is used for fixed connection with the foundation mold; the resistance plate comprises a connecting surface and blocking arc surfaces symmetrically arranged on both sides of the connecting surface, and the connecting surface is a plane structure.

[0009] The lifting ring seat is integrally provided with a lifting hole, a movable slot and a limiting slot; the shaft can rotate in the movable slot and freely move in the vertical direction, providing space for shaft height adjustment and buffering during the turnover process; the bottom of the limiting slot is located on the side away from the shaft of the connecting surface, and satisfies the following core size relationship: the distance between the shaft and the two blocking arc surfaces is the same, and this symmetrical arrangement design can ensure that the blocking arc surfaces can contact and cooperate with the bottom of the limiting slot when the foundation mold swings in any direction during the turnover process, thereby realizing bidirectional energy reduction; the distance between the shaft and the connecting surface is less than the distance between the shaft and the bottom of the limiting slot, and when the shaft is at the lower dead point, the distance between the shaft and the blocking arc surface is greater than the distance between the shaft and the bottom of the limiting slot, and this size setting is the key basis for ensuring that the blocking arc surface can be lifted by the bottom of the limiting slot during the turnover process; the lower dead point is the position of the shaft at the lowest point of the movable slot, and the shaft contacts the bottom of the movable slot; the resistance plate as a whole is used for contacting and cooperating with the limiting slot to play a turnover braking role, and the contact and cooperation of the blocking arc surface of the resistance plate and the bottom of the limiting slot can jointly consume the turnover kinetic energy of the foundation mold through friction and the lifting action of the shaft during the turnover process, thereby reducing the swing amplitude of the foundation mold during the turnover process.

[0010] Before hoisting, the connecting surface is arranged upward, the base mold is in an inverted state, and the rotating shaft is adjusted to be below the common center of gravity of the base mold and the concrete prefabricated base located in the base mold, so as to provide a gravitational potential energy condition for smooth overturning of the base mold; when the lifting ring seat is lifted through the lifting hole, the groove wall of the movable groove supports the rotating shaft to move upward synchronously, and because the common center of gravity of the base mold and the base is located above the rotating shaft, under the action of gravity, the base mold and the base will rotate downward around the rotating shaft; when the connecting surface rotates to the downward state, the blocking arc surfaces on both sides of the resistance plate are in contact with the groove bottom of the limiting groove in sequence, and the rotational kinetic energy of the base mold is converted into frictional internal energy and height potential energy through contact friction and the lifting effect of the rotating shaft, so that the amplitude of the overturning swing of the base mold is significantly reduced, and stable overturning is realized.

[0011] Further, the resistance plate further comprises a semicircular arc surface and side surfaces symmetrically arranged on both sides of the semicircular arc surface, the blocking arc surfaces are smoothly connected with the side surfaces, the center of the semicircular arc surface is located on the axis of the rotating shaft, and the distance between the rotating shaft and the semicircular arc surface is less than the distance between the rotating shaft and the connecting surface. The semicircular arc surface and the side surface will not be in contact with the limiting groove, so as to ensure that the blocking arc surface becomes the only functional area of the resistance plate in contact with the limiting groove, and to avoid interference of other structures with the braking process.

[0012] Further, the lifting ring seat comprises a front end plate, a rear end plate and a groove plate, the groove plate is fixedly connected between the front end plate and the rear end plate, forming a stable frame type structure, and the load bearing capacity of the lifting ring seat is improved. The limiting groove can be surrounded by the rear end plate, the groove plate and the front end plate. Alternatively, an adjusting plate is further installed in the limiting groove, and the limiting groove is surrounded by the rear end plate, the groove plate, the front end plate and the adjusting plate, the upper end surface of the adjusting plate serving as the groove bottom of the limiting groove, and by replacing adjusting plates with different thicknesses, the height of the groove bottom of the limiting groove can be flexibly adjusted to adapt to the inertia difference of base molds and bases of different specifications, so as to ensure the buffering and damping effect.

[0013] Further, the movable groove comprises a small waist-shaped groove and a large waist-shaped groove, the small waist-shaped groove is located below the large waist-shaped groove and communicates with the large waist-shaped groove, the width of the small waist-shaped groove is matched with the diameter of the rotating shaft, so as to ensure that the rotating shaft moves in the small waist-shaped groove; and the width of the large waist-shaped groove is matched with the width of the resistance plate, so that the resistance plate can freely enter and exit the large waist-shaped groove, facilitating disassembly and assembly of the base mold connecting assembly and the lifting ring seat. The movable groove can be only provided on the rear end plate, or provided on the rear end plate and the front end plate, and the latter can further improve the stability of the movement of the rotating shaft.

[0014] Further, a rectangular hole is arranged on the connecting seat, the rotating shaft comprises an integral square shaft part and a circular shaft part, the square shaft part is slidably installed in the rectangular hole, and the rotation of the rotating shaft relative to the connecting seat is limited through cooperation of the rectangular hole and the square shaft part.

[0015] The end of the square shaft part away from the round shaft part is connected with a stop block through an axial bolt, the stop block is in close abutment with the end face of the connecting seat and the end face of the square shaft part, and the outer side of the rotating shaft is limited in the axial direction; two gaskets are also slidably installed in the rectangular hole and on the two sides of the square shaft part, the two gaskets are in abutment with the side faces on the two sides of the square shaft part in the radial direction respectively, the gaskets are connected with the stop block through radial bolts, the square shaft part and the two gaskets jointly fill the rectangular hole, and the rectangular hole and the gaskets jointly limit the radial movement of the square shaft part; the total thickness of the two gaskets is constant, the relative position of the square shaft part and the connecting seat can be finely adjusted by selecting gaskets with different thicknesses, so that the height of the rotating shaft is finely adjusted, and the fine adjustment accuracy is ensured; the rotating shaft is limited from moving outward at one end through the stop block, and the rotating shaft is limited from moving inward at the other end through the limiting groove, and the rotating shaft is not axially moved due to the double limitations of the inside and the outside.

[0016] The application also discloses a mold overturning system for an independent foundation mold of the reverse pouring type, which comprises a foundation mold, a fixed plate and the mold overturning lifting appliance.

[0017] Further, two rows of first mounting holes are formed in the two sides of the connecting seat; two rows of second mounting holes which are arranged in an interval and staggered are formed in the fixed plate, each row of the second mounting holes corresponds to each row of the first mounting holes, and the fixed plate and the connecting seat are connected through a bolt assembly which passes through the first mounting holes and the second mounting holes. By selecting the second mounting holes and the first mounting holes at different positions to cooperate, the mounting height of the connecting seat and the fixed plate can be flexibly adjusted, so that the rotating shaft can be accurately positioned below the common center of gravity of the foundation mold and the foundation before hoisting.

[0018] Compared with the prior art, the technical scheme has at least one of the following beneficial effects:

[0019] 1. By adjusting the height of the rotating shaft, the center of gravity is positioned, and the rotating shaft is ensured to be in the best overturning position; in combination with the buffering and damping structure of the resistance plate and the limiting groove, kinetic energy is converted into internal energy through the friction of the contact surface, the rotating shaft is lifted by the limiting groove, the whole foundation mold is lifted, part of the rotating kinetic energy is converted into lifting potential energy, the kinetic energy is rapidly attenuated, the swing range of the foundation mold during overturning is controlled within a very small range, the safety hidden danger caused by the excessive swing of the heavy foundation mold in the air is eliminated, the safety of the operator and the equipment is ensured, the swing times are reduced, the time of stopping swing is reduced, and the mold overturning efficiency is improved;

[0020] 2. The height of the bottom of the limiting groove is adjusted through the adjusting plate, and in combination with the multi-gear mounting hole design of the fixed plate and the connecting seat, the device can adapt to independent foundation molds of different specifications and different weights, and the adaptability is improved;

[0021] 3. By setting two symmetrical blocking arc surfaces, it is ensured that the same energy reduction can be provided in any direction during the turnover, and the turnover stability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A structure schematic diagram of the turnover lifting appliance provided by the embodiment of the present application is shown in the figure.

[0023] Figure 2 An explosion schematic diagram of the turnover lifting appliance provided by the embodiment of the present application is shown in the figure.

[0024] Figure 3 A working state of the turnover lifting appliance provided by the embodiment of the present application is shown in the figure. Figure 1 (The front end plate is omitted.);

[0025] Figure 4 A working state of the turnover lifting appliance provided by the embodiment of the present application is shown in the figure. Figure 2 (The rotating shaft is lifted by the bottom of the limiting groove.);

[0026] Figure 5 A structure schematic diagram of the mold connecting assembly provided by the embodiment of the present application is shown in the figure.

[0027] Figure 6 A structure schematic diagram of the turnover system provided by the embodiment of the present application is shown in the figure. Figure 1 (The lifting ring seat is omitted.);

[0028] Figure 7 A structure schematic diagram of the turnover system provided by the embodiment of the present application is shown in the figure. Figure 2 ;

[0029] In the figure, 1, mold connecting assembly; 11, connecting seat; 111, rectangular hole; 112, first mounting hole; 12, rotating shaft; 121, square shaft part; 122, round shaft part; 13, resistance plate; 131, connecting surface; 132, blocking arc surface; 133, semicircular arc surface; 134, side surface; 14, gasket; 15, stop block; 2, lifting ring seat; 21, lifting hole; 22, movable groove; 221, small waist-shaped groove; 222, large waist-shaped groove; 23, limiting groove; 24, front end plate; 25, rear end plate; 26, groove plate; 27, adjusting plate; 3, fixed plate; 31, second mounting hole; 4, base mold. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] Referring to Figures 1 to 5 As shown in the drawings, the embodiment of the present application provides a turnover lifting device for reverse pouring type independent foundation mold, which comprises a mold connecting assembly 1 and a lifting ring seat 2.

[0032] The mold connecting assembly 1 comprises a connecting seat 11, a rotating shaft 12 and a resistance plate 13, and the rotating shaft 12 is detachably connected with the connecting seat 11. The rotating shaft 12 is integrally formed with the resistance plate 13 or fixedly connected with the resistance plate 13 through welding, so as to ensure the connection strength.

[0033] The resistance plate 13 comprises a connecting face 131 with a plane structure, a blocking arc face 132, a semicircular arc face 133 and a side face 134, the blocking arc face 132 is symmetrically arranged on both sides of the connecting face 131, and the side face 134 is symmetrically arranged on both sides of the semicircular arc face 133, and the center of the semicircular arc face 133 is located on the axis of the rotating shaft 12.

[0034] The lifting ring seat 2 comprises a front end plate 24, a rear end plate 25 and a groove plate 26, all of which are made of steel plates and fixedly connected through bolt connection or welding, so as to form a frame structure. The lifting ring seat 2 is provided with a lifting hole 21 at the top thereof, specifically at the top of the front end plate 24 and the rear end plate 25. The lifting ring seat 2 is provided with a movable groove 22, specifically on the front end plate 24 and the rear end plate 25, or on the rear end plate 25 alone. When the movable groove 22 is provided on the rear end plate 25 alone, the length of the rotating shaft 12 needs to be reduced to avoid contact with the front end plate 24. The center line of the movable groove 22 coincides with the center line of the lifting ring seat 2, so that the bearing stress of the lifting ring seat 2 is more uniform.

[0035] The movable groove 22 comprises a small waist-shaped groove 221 and a large waist-shaped groove 222, the small waist-shaped groove 221 is located below the large waist-shaped groove 222 and communicates with the large waist-shaped groove 222, the width of the small waist-shaped groove 221 is 72mm, which is slightly larger than the diameter of the rotating shaft 12 so as to be matched with the rotating shaft 12, and the width of the large waist-shaped groove 222 is 121mm, which is slightly larger than the width of the resistance plate 13 so as to be matched with the resistance plate 13. The groove plate 26 has a U-shaped structure, and the front end plate 24, the rear end plate 25 and the groove plate 26 form a limiting groove 23 therebetween. The length of the limiting groove 23 is 260mm, and the width thereof is 24mm.

[0036] The limiting groove 23 is provided with an adjusting plate 27, the length of the adjusting plate 27 is slightly smaller than the length of the limiting groove 23, and the width of the adjusting plate 27 is slightly smaller than the width of the limiting groove 23, so that the adjusting plate 27 can be moved into and out of the limiting groove 23.

[0037] According to the specifications of the foundation mold, the thickness of the adjusting plate 27 is changed or the number of the adjusting plates 27 is selected, so as to adjust the height of the groove bottom of the limiting groove 23.

[0038] The adjusting plate 27 can be provided as one or more. When the adjusting plate 27 is provided as one, the upper end surface of the adjusting plate 27 serves as the groove bottom of the limiting groove 23. When the adjusting plate 27 is provided as multiple, the upper end surface of the uppermost adjusting plate 27 serves as the groove bottom of the limiting groove 23.

[0039] In this embodiment, the length of the adjusting plate 27 is set to 259 mm, the width is set to 23 mm, and the number of the adjusting plate 27 is set to two. The heights of the two adjusting plates 27 are 12 mm and 8 mm, respectively.

[0040] In this embodiment, the diameter of the rotating shaft 12 is set to 58 mm, the radius of the semicircular surface 133 is set to 70 mm, and the distance between the rotating shaft 12 axis and the semicircular surface 133 is equal to the radius 70 mm of the semicircular surface 133. The side surface 134 is perpendicular to the connecting surface 131, the length of the side surface 134 is 110 mm, and the distance between the rotating shaft 12 axis and the connecting surface 131 is equal to the length 110 mm of the side surface 134. The radius of the blocking arc surface 132 is 10 mm, and the length of the connecting surface 131 is 120 mm. When the rotating shaft 12 is at the bottom dead center, the distance between the rotating shaft 12 axis and the groove bottom of the limiting groove 23 is 113 mm. The maximum distance between the rotating shaft 12 axis and the blocking arc surface 132 is 126 mm. There is a sufficient safety gap between the semicircular surface 133, the side surface 134, and the limiting groove 23, and no contact interference occurs.

[0041] In this embodiment, the thickness of the resistance plate 13 is set to 23 mm, the rectangular hole 111 with a size of 60*90 mm is arranged on the connecting seat 11, the rotating shaft 12 includes an integral square shaft part 121 and a circular shaft part 122, the square shaft part 121 has a cross-sectional size of 60*60 mm, and the circular shaft part 122 has a diameter of 58 mm. The square shaft part 121 is slidingly installed in the rectangular hole 111, and the rotation of the rotating shaft 12 relative to the connecting seat 11 is limited by the cooperation of the rectangular hole 111 and the square shaft part 121. The circular shaft part 122 is fixedly connected with the resistance plate 13.

[0042] The end of the square shaft part 121 away from the circular shaft part 122 is connected with a stop block 15 through an axial bolt. An internal thread hole adapted to the axial bolt is arranged on the square shaft part 121. The stop block 15 is in close abutment with the end surface of the connecting seat 11 and the end surface of the square shaft part 121, thereby achieving the external axial limiting of the rotating shaft 12. Two spacers 14 are also slidingly installed in the rectangular hole 111 and located on both sides of the square shaft part 121. The two spacers 14 are in abutment with the side surfaces on the two radial sides of the square shaft part 121, respectively. The spacers 14 are connected with the stop block 15 through radial bolts. An internal thread hole adapted to the radial bolt is arranged on the stop block 15. The square shaft part 121 and the two spacers 14 jointly fill the rectangular hole 111, and the rectangular hole 111 and the spacers 14 jointly limit the radial movement of the square shaft part 121.

[0043] The total thickness of the two gaskets 14 is 30mm, and the relative positions of the square shaft portion 121 and the connecting seat 11 can be finely adjusted by selecting gaskets 14 with different thicknesses. For example, if the thicknesses of the upper gasket 14 and the lower gasket 14 are 14mm and 16mm respectively, the rotating shaft 12 is located at a position above the center of the rectangular hole 111, thereby ensuring fine adjustment accuracy. The rotating shaft 12 cannot move outward at one end through the stop block 15, and cannot move inward at the other end through the cooperation of the resistance plate 13 and the limiting groove 23, so that the rotating shaft 12 cannot move axially and is axially limited from both inside and outside.

[0044] As shown in Figure 6 and Figure 7 , the embodiment of the present application also provides a mold turnover system for a reverse pouring type independent foundation mold, which comprises a foundation mold 4, a fixed plate 3 and a mold turnover lifting appliance, and the mold turnover lifting appliance is provided with two mold turnover lifting appliances and is symmetrically distributed on the left and right sides of the foundation mold 4. Figure 2 As shown in , two rows of first mounting holes 112 with a diameter are formed on the left and right sides of the connecting seat 11, and the first mounting holes 112 are circular holes.

[0045] Figure 6 As shown in , two groups of fixed plates 3 are welded on the foundation mold 4, each group comprises two fixed plates 3, the fixed plates 3 are located between the two connecting seats 11, and two rows of second mounting holes 31 which are arranged in an interval staggered manner are formed on the fixed plates 3, the second mounting holes 31 are waist-shaped holes, and the row spacing is adapted to the row spacing of the first mounting holes 112. The connecting seat 11 and the fixed plate 3 are fixedly connected through a bolt assembly, and the height of the rotating shaft 12 can be adjusted by selecting second mounting holes 31 at different positions. The interval staggered arrangement of the second mounting holes 31 can avoid the strength reduction caused by the concentration of the holes.

[0046] In this embodiment, the rotating shaft 12 is adjusted to be below the common center of gravity by adjusting the mounting position of the bolt assembly, the height of the rotating shaft 12 is finely adjusted by selecting the relative thicknesses of the two gaskets 14, the center of gravity is accurately positioned, the gradient consumption of turnover kinetic energy is realized by the cooperation of the resistance plate 13 and the limiting groove 23, and the swing amplitude of the foundation mold 4 during the turnover process is controlled within a very small range, and the specific process is as follows:

[0047] S1, pre-adjustment stage: according to the specification of the basic mold and the concrete foundation to be turned over, the height of the groove bottom of the limiting groove 23 is adjusted by replacing the adjusting plate 27 with different thicknesses, and according to the radial gap between the rectangular hole 111 and the square shaft part 121, two gaskets 14 with the same total thickness are selected and installed on the two sides of the square shaft part 121 respectively and abut against the side surface of the square shaft part 121, and the relative position of the square shaft part 121 and the connecting seat 11 is fine adjusted and the radial movement is limited by the radial bolt fastening stop block 15; then the second mounting hole 31 of the fixed plate 3 at different positions is selected to cooperate with the first mounting hole 112 of the connecting seat 11, and the rotating shaft 12 is adjusted to be directly below the common center of gravity of the foundation mold 4 and the foundation, at this time the connecting surface 131 faces upward, the foundation mold 4 is in an inverted state, and the rotating shaft 12 will not produce axial movement under the double restriction of the stop block 15 and the resistance plate 13 and the limiting groove 23;

[0048] S2, lifting and turning stage: the lifting hook of the lifting equipment is connected with the lifting hole 21 of the lifting ring seat 2 and the lifting is started, the small waist-shaped groove 221 of the movable groove 22 supports the rotating shaft 12 to rise synchronously during the lifting of the lifting ring seat 2, and since the center of gravity is located above the rotating shaft 12, the foundation mold 4 and the foundation rotate downward around the rotating shaft 12 under the action of the gravity moment;

[0049] S3, buffer and amplitude reduction stage: when the foundation mold 4 is rotated to a certain angle, such as 45 degrees, the connecting surface 131 is inclined downward, the blocking arc surface 132 on one side of the resistance plate 13 first contacts the groove bottom of the limiting groove 23, and the resistance plate 13 begins to play a braking role; since the rotating kinetic energy of the foundation mold 4 and the foundation is large, it can overcome the initial contact resistance to continue to rotate, at this time, since the distance between the rotating shaft 12 and the connecting surface 131 is less than the distance between the rotating shaft 12 and the groove bottom of the limiting groove 23, and the distance between the rotating shaft 12 and the blocking arc surface 132 is greater than the distance between the rotating shaft 12 and the groove bottom of the limiting groove 23 when the rotating shaft 12 is at the lower dead point, the groove bottom of the limiting groove 23 will produce an upward jacking force on the blocking arc surface 132, as shown in Figure 3 and Figure 4 , the rotating shaft 12 is lifted upward along the small waist-shaped groove 221, but will not enter the large waist-shaped groove 222, and the foundation mold 4 is lifted synchronously with the rotating shaft 12; during this process, part of the rotating kinetic energy of the foundation mold 4 is converted into the frictional internal energy of the resistance plate 13 and the groove bottom of the limiting groove 23, and the rotating shaft 12 and the movable groove 22, and also into the height potential energy of the lifted foundation mold 4, the double energy conversion mechanism makes the rotating speed of the foundation mold 4 significantly reduced and the swing amplitude greatly reduced, and this process fully embodies the advantages of bidirectional braking and energy reduction brought by the symmetrical arrangement and specific size relationship of the blocking arc surface 132;

[0050] S4, stable stop phase: when one side of the blocking arc surface 132 is in contact with the bottom of the limiting groove 23, the base mold 4 will swing to the other side under the action of inertia, and at this time the other side of the blocking arc surface 132 is in contact with the bottom of the limiting groove 23; because the kinetic energy of the base mold 4 has been greatly consumed, it cannot overcome the resistance of the bottom of the limiting groove 23 and the force required to lift the rotating shaft 12, and the base mold 4 will swing in the opposite direction under the action of gravity, and through multiple small swings, the remaining kinetic energy will be completely converted into internal energy, and finally the swing will stop, and the stable overturning is completed.

[0051] It should be noted that, for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0053] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0054] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A formwork lifting device for inverted casting type independent foundation molds, characterized in that, It includes a mold connection assembly and a lifting ring seat. The mold connection assembly includes a connecting seat, a rotating shaft, and a resistance plate connected in sequence. The connecting seat is used to connect to the base mold. The resistance plate includes a connecting surface and blocking arc surfaces symmetrically arranged on both sides of the connecting surface; The lifting ring seat is provided with a lifting hole, a movable groove, and a limiting groove. The rotating shaft can rotate and move up and down within the movable groove. The bottom of the limiting groove is located on the side of the connecting surface away from the rotating shaft. The distance between the rotating shaft and the two blocking arc surfaces is the same, and the distance between the rotating shaft and the connecting surface is less than the distance between the rotating shaft and the bottom of the limiting groove. When the rotating shaft is at its lower dead center, the distance between it and the blocking arc surface is greater than the distance between it and the bottom of the limiting groove. The blocking arc surface is used to contact and engage with the bottom of the limiting groove to lower the rotating shaft during the flipping process through friction and the lifting action of the rotating shaft. The basic mold has a low rotation and swing amplitude; the lifting ring seat includes a front end plate, a rear end plate, and a groove plate, with the groove plate located between the front end plate and the rear end plate, and the groove plate is fixedly connected to the front end plate and the rear end plate; the limiting groove is formed by the rear end plate, the groove plate, and the front end plate; the movable groove includes a small waist-shaped groove and a large waist-shaped groove, with the small waist-shaped groove located below and connected to the large waist-shaped groove, the width of the small waist-shaped groove being smaller than the width of the large waist-shaped groove, the small waist-shaped groove being adapted to the rotating shaft, and the rotating shaft contacting and engaging with the small waist-shaped groove; the large waist-shaped groove being adapted to the resistance plate.

2. The mold-turning lifting device according to claim 1, characterized in that, The resistance plate also includes a semi-circular arc surface and side surfaces symmetrically arranged on both sides of the semi-circular arc surface. The blocking arc surface is connected to the side surfaces, and the distance between the rotating shaft and the semi-circular arc surface is less than the distance between the shaft and the connecting surface.

3. The mold-turning lifting device according to claim 1, characterized in that, The limiting groove is equipped with an adjustment plate. The limiting groove is formed by the rear end plate, the groove plate, the front end plate, and the adjustment plate. The upper end surface of the adjustment plate serves as the bottom of the limiting groove.

4. The mold-turning lifting device according to claim 1, characterized in that, The movable slot is located on the rear end plate, or on the front end plate and the rear end plate respectively.

5. The mold-turning lifting device according to claim 1, characterized in that, The connecting seat has a rectangular hole. The rotating shaft includes a square shaft part and a round shaft part. The square shaft part is slidably installed in the rectangular hole. The end of the square shaft part away from the round shaft part is connected to a stop block by an axial bolt. Two shims are also slidably installed in the rectangular hole on both sides of the square shaft part. The two shims abut against the radial sides of the square shaft part respectively. The rectangular hole and the shims together restrict the radial movement of the square shaft part. The shims are connected to the stop block by radial bolts. The total thickness of the two shims is constant. The relative position of the rotating shaft and the connecting seat can be finely adjusted by selecting shims of different thicknesses.

6. A mold-turning system for inverted casting type independent foundation molds, characterized in that, It includes a base mold, a fixing plate, and a mold flipping hoist as described in any one of claims 1 to 5. Two mold flipping hoists are provided and symmetrically distributed on both sides of the base mold. Fixing plates are fixed on the base mold and on both sides of the rotating shaft. The connecting seat is fixedly connected to the fixing plate.

7. The mold-making system according to claim 6, characterized in that, The connecting seat has two rows of first mounting holes on both sides; the fixing plate has two rows of second mounting holes arranged alternately, each row of second mounting holes corresponding to each row of first mounting holes, and the fixing plate and the connecting seat are connected by bolt assemblies passing through the first mounting holes and the second mounting holes.

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