A reinforced concrete column crushing and demolition device

Abstract

The jack-up mechanism is a kind of pile breaker with the present invention, and its first function is to break the pile and break the pile head, and the jack-up mechanism is a kind of pile breaker with the first function.

Description

Technical Field

[0001] The present invention relates to the technical field of pile breaking equipment, in particular to a reinforced concrete column crushing and demolition device. Background Art

[0002] Reinforced concrete columns are common vertical load-bearing components in building structures. They are mainly used to bear the loads from upper structures such as floor slabs and beams, and transfer them to the foundation. In construction, urban renovation and other projects, the demolition of reinforced concrete columns is a common and important work content. With the rapid development of the construction industry, traditional manual demolition methods have gradually been replaced by mechanized demolition equipment due to low efficiency, high labor intensity and high safety risks. At present, pile breakers are widely used on the market. This type of pile breaker is connected to lifting equipment through a sling to achieve lifting and moving, which has improved the demolition efficiency of reinforced concrete columns to a certain extent.

[0003] However, the existing pile breakers still have some problems in practical application. For example, when the pile breaker body is lifted by a sling for operation, it is difficult to ensure that the pile breaker and the concrete column to be broken are in a vertical state. The vertical deviation of the pile breaker will cause the pile breaking heads of each pile breaking unit to be unable to be on the same working surface, which not only reduces the crushing efficiency of the concrete column, but also may affect the pile breaking effect due to uneven force, and even cause safety accidents. After searching, a patent with application number 201810437127.8 discloses a hydraulic pile breaker, in which a support shoe device is provided at the front end of the hydraulic cylinder. The piston rod of the hydraulic cylinder can push the support shoe to extend first, so that the support shoe contacts and clamps the pile body before the pile breaking bit contacts the pile body. When the piston rod of the hydraulic cylinder is extended more, the clamping force of the support shoe on the pile body will increase, and then the angle between the pile breaker and the pile body can be self-adjusted to keep the pile breaker and the pile body vertical, ensuring that the pile breaking bit of the pile breaker can be vertically inserted into the pile body during operation, thereby greatly improving the pile breaking quality.

[0004] In actual use, the hydraulic cylinder first transmits power to the support shoe device, and then squeezes the pile breaker bit after the pile breaker is adjusted. When the hydraulic cylinder enters the squeeze bit, the initially compressed support shoe device does not relieve the force due to the operation of the pile breaker bit. Instead, it continues to bear the power transmission from the hydraulic cylinder. From the perspective of energy utilization, because the support shoe always closely adheres to the concrete column, the support shoe and the pile breaker bit are subjected to force simultaneously during the pile breaking process. This unreasonable force causes a large amount of power to be consumed in maintaining the contact pressure between the support shoe and the concrete column, rather than all of it being used to break the pile by the pile breaker bit, resulting in a huge waste of energy. Secondly, the continuous and increasing squeezing force will severely test the various components of the support shoe device, especially the spring. When the spring exceeds the elastic limit, it will undergo plastic deformation (inelastic deformation). At this time, after the external force is removed, the spring cannot return to its original length, resulting in a significant decrease in its mechanical properties (such as elasticity and stiffness) or even failure, thereby shortening its service life. To this end, we propose a reinforced concrete column crushing and demolition device. Summary of the Invention

[0005] To solve the above technical problems, an embodiment of the present application provides a reinforced concrete column crushing and demolition device, including a pile breaker body, wherein the pile breaker body is composed of a plurality of pile breaking units assembled in a ring shape through a connecting frame, the pile breaking unit is composed of a cylinder, a piston rod and a pile breaking head, and the piston rod and the pile breaking head are movably connected, and further comprising a straightening assembly, wherein the straightening assembly is arranged inside the cylinder and is sleeved on the outside of the pressing section of the piston rod, and a movable pressing assembly is provided between the straightening assembly and the piston end of the piston rod, and a limit bar is provided on the pile breaking head to limit the straightening assembly.

[0006] In some embodiments, the straightening assembly includes a fixed ring and a first sleeve, and the ring and the first sleeve can be movably sleeved on the outside of the piston rod pressing section, and a first pressure head is installed on the outer end of the first sleeve.

[0007] In some embodiments, the piston rod is provided with an axial receiving groove, a push rod is connected to the receiving groove, the pile breaking head is composed of a tip portion and a straight rod portion, and the straight rod portion is provided with an axial embedding groove for the push rod to enter.

[0008] In some embodiments, the movable pressing assembly includes a first guide rod, one end of which is fixed on the piston end of the piston rod, and the other end passes through a collar. A second spring is sleeved on the outside of the first guide rod, and a movable limiter is provided inside the collar.

[0009] In some embodiments, the movable limit member includes a second sleeve, one end of the second spring is connected to the second sleeve, the first guide rod passes through the second sleeve, a lifting magnetic positioning block is provided on the outer circumference of the second sleeve, and a lifting magnetic push block is installed on the outer wall of the piston rod, and the magnetic push block and the magnetic positioning block are magnetically attracted to each other.

[0010] In some embodiments, a second groove extending downward is provided in the collar, and a third spring is provided between the bottom end of the magnetic positioning block and the second groove.

[0011] In some embodiments, both sides of the magnetic push block are provided with inclined surfaces, and when the magnetic push block is in a natural state, the upper end of the magnetic positioning block is embedded in the second sleeve.

[0012] In some embodiments, the push rod is provided with a lifting push bar, the straight rod portion is provided with a first guide groove, the outer wall of the piston rod is provided with a through groove, the limit bar passes through the first guide groove and the through groove, and the inside of the cylinder is provided with a limit groove for embedding the top end of the limit bar.

[0013] In some embodiments, a guide hole is opened on the outer wall of the first sleeve just for the limiting strip to pass through, and the lengths of the first guide groove and the through groove are both greater than the length of the guide hole.

[0014] In some embodiments, a first groove is formed on the outside of the push rod, and a first spring is connected between the bottom end of the push bar and the bottom end of the first groove.

[0015] The present invention has at least the following beneficial effects:

[0016] 1. By setting up the straightening component, the interaction force between the first pressure head and the concrete column is used to adjust the pile breaker body and the concrete column to a relatively vertical state, so that the pile breaking heads of each pile breaking unit are on the same working surface, standardizing the initial state of the pile breaking operation and greatly improving the concrete column crushing efficiency.

[0017] 2. After the straightening assembly straightens the pile breaker body, the movable pressure assembly will release the pressure state during subsequent power output, which can release the power output to the straightening assembly, so that the straightening assembly no longer bears the reaction force of pile breaking, effectively avoiding structural fatigue damage due to continuous force. At the same time, the impact force of subsequent pile breaking operations is directly applied to the pile head, avoiding the straightening assembly from sharing power, and further improving the pile breaking efficiency.

[0018] 3. As an expandable component, the external pressure piece can be flexibly installed on the pile breaker body according to different working conditions to meet complex and diverse operating requirements. During installation, the telescopic piece cooperates with the enclosure to reduce radial shaking, and the double-limit fixing mechanism composed of threaded rods and pressure blocks not only ensures the stability of the telescopic piece during operation, but also enables rapid disassembly by rotating the threaded rod. Compared with traditional bolt fixing, it greatly improves installation efficiency and facilitates subsequent maintenance and component replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the pile breaking unit in the cross-sectional state of the cylinder of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall structure of the embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the appearance structure of the pile breaking unit of the present invention;

[0022] Figure 4 A schematic structural diagram of the pile breaking unit of the present invention with the cylinder and the straightening assembly in cross-section;

[0023] Figure 5 A schematic structural diagram of the pile breaking unit of the present invention, showing a cross-sectional view of the cylinder, piston rod and straightening assembly;

[0024] Figure 6 It is a structural schematic diagram of the pile breaking unit of the present invention in a cross-sectional view of the cylinder, piston rod, pile breaking head and straightening assembly;

[0025] Figure 7 Schematic diagram of the cross-sectional structure of the push rod of the present invention;

[0026] Figure 8 For the present invention Figure 4 A is an enlarged schematic diagram;

[0027] Figure 9 Schematic diagram of the overall structure of the second embodiment of the present invention;

[0028] Figure 10 It is a structural schematic diagram of the external pressure positive component of the present invention.

[0029] In the figure: 1- pile breaker body;

[0030] 2-pile breaking unit; 21-cylinder; 22-piston rod; 221-accommodating groove; 222-push rod; 2221-first groove; 2222-first spring; 223-push bar; 224-through groove; 23-pile breaking head; 231-tip portion; 232-straight rod portion; 233-first guide groove;

[0031] 3-Connecting frame; 4-Lifting ring;

[0032] 5-straightening assembly; 51-ring; 52-first sleeve; 53-first pressure head;

[0033] 6-movable pressing assembly; 61-first guide rod; 62-second spring; 63-movable stopper; 631-second sleeve; 632-magnetic positioning block; 633-third spring; 634-second groove; 64-magnetic push block;

[0034] 7-limiting bar; 8-limiting slot;

[0035] 9-external pressure component; 91-mounting frame; 92-enclosing plate; 93-telescopic component; 94-second pressure head; 95-limiting component; 951-threaded rod; 952-stop block; 953-pressure block; 954-second guide rod. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example 1: Please refer to Figures 1-8 As shown, the present invention provides a technical solution: a reinforced concrete column crushing and demolition device, including a pile breaker body 1, the pile breaker body 1 is composed of a plurality of pile breaking units 2 formed by a ring-shaped combination through a connecting frame 3, the pile breaking unit 2 is composed of a cylinder 21, a piston rod 22 and a pile breaking head 23, a lifting ring 4 is fixed on the connecting frame 3, when in use, the lifting ring 4 is connected to a sling (iron chain), and the pile breaker body 1 is lifted and moved by a lifting equipment. The above is the prior art, and the specific structure and principle are not repeated here. The piston rod 22 and the pile breaking head 23 are movably connected, and further comprising a straightening component 5, which is arranged inside the cylinder 21 and sleeved on the outside of the pressing section of the piston rod 22. The straightening component 5 is used to break the concrete when the pile breaker body 1 Before the pile is broken, the pile breaker body 1 lifted by the sling is adjusted to a vertical state with the broken concrete column, so that the pile breaking heads 23 of the pile breaking units 2 of the pile breaker are ensured to be on the same working surface. At the same time, the standardization of the initial state of the pile breaking operation is guaranteed, and the concrete column crushing efficiency is greatly improved. A movable pressure component 6 is provided between the straightening component 5 and the piston end of the piston rod 22, and a limit bar 7 for limiting the straightening component 5 is provided on the pile breaking head 23. It is used to limit the position of the straightening component 5 after the straightening component 5 straightens the pile breaker body 1, and realize the release of the movable pressure component 6, so that the impact force generated by the subsequent pile breaking operation directly acts on the pile breaking head 23, effectively avoiding structural fatigue caused by the straightening component 5 continuously bearing the reaction force of the pile breaking.

[0038] Among them, see Figure 1 as well as Figure 3-Figure 6 As shown, the straightening assembly 5 includes a fixed collar 51 and a first sleeve 52. Both the collar 51 and the first sleeve 52 are movably sleeved on the outside of the pressing section of the piston rod 22. A first pressure head 53 is installed on the outer end of the first sleeve 52. After hydraulic oil is introduced from the oil inlet of the cylinder 21, the piston end of the piston rod 22 moves, and then the movable pressing assembly 6 is used to push the collar 51 outward, so that the first sleeve 52 is used to push the first pressure head 53 outward, and then the first pressure head 53 is used to press on the concrete column to be broken. By continuing to apply force, the interaction force between the first pressure head 53 and the concrete column will adjust the pile breaker body 1 and the concrete column to a vertical state.

[0039] See Figure 5-Figure 6 As shown, the piston rod 22 is provided with an axial receiving groove 221, and a push rod 222 is connected to the receiving groove 221. The pile breaking head 23 is composed of a tip portion 231 and a straight rod portion 232. The straight rod portion 232 is provided with an axial embedding groove for the push rod 222 to enter. During the operation of the straightening assembly 5, the push rod 222 in the receiving groove 221 will move toward the pile breaking head 23, and the end of the push rod 222 can enter the axial embedding groove of the straight rod portion 232.

[0040] See Figure 5-Figure 7 As shown, the push rod 222 is provided with a lifting push bar 223, specifically, a first groove 2221 is opened on the outside of the push rod 222, and a first spring 2222 is connected between the bottom end of the push bar 223 and the bottom end of the first groove 2221. In the natural state of the first spring 2222, the upper end surface of the push bar 223 is slightly higher than the upper end surface of the straight rod portion 232, and the straight rod portion 232 is provided with a first guide groove 233. The outer wall of the piston rod 22 is provided with a through groove 224, which limits the position. The bar 7 passes through the first guide groove 233 and the through groove 224. A limiting groove 8 is provided inside the cylinder 21 for the top end of the limiting bar 7 to be embedded. A guide hole is provided on the outer wall of the first sleeve 52 for the limiting bar 7 to pass through, so as to achieve synchronous movement of the limiting bar 7. The lengths of the first guide groove 233 and the through groove 224 are both greater than the length of the guide hole. The setting of the lengths of the first guide groove 233 and the through groove 224 can avoid the limiting bar 7 from blocking the pile head 23 when it moves outward.

[0041] When the piston rod 22 moves to push the collar 51 outward, the push rod 222 moves synchronously with the piston rod 22. When all the push strips 223 on the push rod 222 move to the position of the first guide groove 233, the limit strip 7 moves to face the limit groove 8, and the push strip 223 loses its pressure and can instantly move down under the action of the first spring 2222, so that the top end of the limit strip 7 moves up and enters the limit groove 8, thereby locking the first sleeve 52 and the cylinder 21. At the same time, the bottom end of the upward limit strip 7 is just flush with the upper end surface of the straight rod portion 232, and the upper end surface of the push strip 223 is also slightly flush with the upper end surface of the straight rod portion 232 under pressure, so that the limit strip 7 will not block the subsequent outward movement of the straight rod portion 232.

[0042] See Figure 1 and Figure 4 As shown, the movable pressing assembly 6 includes a first guide rod 61, one end of the first guide rod 61 is fixed on the piston end of the piston rod 22, and the other end passes through the ring 51. A second spring 62 is sleeved on the outside of the first guide rod 61, and the first guide rod 61 plays a guiding role. A movable limiter 63 is provided in the ring 51.

[0043] Among them, see Figure 4-Figure 6 as well as Figure 8 As shown, the movable limiter 63 includes a second sleeve 631, one end of the second spring 62 is connected to the second sleeve 631, the first guide rod 61 passes through the second sleeve 631, and a lifting magnetic positioning block 632 is provided on the outer circumference of the second sleeve 631. A lifting magnetic push block 64 is installed on the outer wall of the piston rod 22. The magnetic push block 64 is arranged close to the collar 51, so that the moving distance of the magnetic push block 64 is short, reducing the loss of force transmitted to the straightening component 5. Similarly, a groove is provided on the piston rod 22, and a magnetic positioning block 632 is provided on the outer wall of the piston rod 22. A spring is connected between the bottom end of the magnetic push block 64 and the embedding groove, the magnetic push block 64 and the magnetic positioning block 632 are magnetically attracted to each other, and a second groove 634 is provided downwardly through the ring 51. A third spring 633 is provided between the bottom end of the magnetic positioning block 632 and the second groove 634. The elastic force value of the third spring 633 is greater than the elastic force value of the spring connected to the bottom end of the magnetic push block 64. Inclined surfaces are provided on both sides of the magnetic push block 64. When the magnetic push block 64 is in a natural state, the upper end of the magnetic positioning block 632 is embedded in the second sleeve 631.

[0044] When the second groove 634 is reached, the magnetic push block 64 can move upward under the elastic force of the third spring 633, so that the magnetic push block 64 is close to the magnetic positioning block 632, thereby attracting the magnetic positioning block 632 to move downward, so that the top end of the magnetic positioning block 632 is offline and out of the state of restricting the second sleeve 631. At this time, the second sleeve 631 connected to the second spring 62 can pass through the collar 51, and the first guide rod 61 and the second spring 62 can both pass through the collar 51, so that no power is applied to the collar 51. This allows the subsequent hydraulic power to be fully transmitted to the pile breaking head 23, avoiding the straightening component 5 from sharing part of the power, improving the pile breaking efficiency, and also avoiding the occurrence of damage caused by excessive squeezing of the straightening component 5.

[0045] Example 2: Please refer to Figure 9-10 As shown, the difference between this embodiment and embodiment 1 is that the alignment component 5 is an external pressure positive component 9, which is detachably mounted on the connecting frame 3 and can be fixed with bolts. The external pressure positive component 9 is used to align the pile breaker body 1 from the outside before breaking the pile, and the external pressure positive component 9 includes a mounting frame 91 detachably mounted on the upper end surface of the connecting frame 3, a telescopic member 93 is provided on the supporting surface of the mounting frame 91, and the telescopic member 93 can be a hydraulic cylinder. A second pressure head 94 is installed at the output end of the telescopic member 93, and a panel 92 that can be sleeved on the outside of the telescopic member 93 is fixed on the supporting surface of the mounting frame 91 to limit the telescopic member 93, and a limit member 95 is installed at the end of the upper end of the mounting frame 91 to further ensure the stability of the telescopic member 93.

[0046] Among them, the limiting member 95 includes a threaded rod 951 that is vertically screwed through the mounting frame 91. A handwheel can be installed on the top of the threaded rod 951. A stop block 952 is installed on the bottom end of the threaded rod 951 through a bearing, and a pressure block 953 is installed on the outer ring of the bearing. The top of the pressure block 953 is connected to the second guide rod 954, and the second guide rod 954 passes through the mounting frame 91.

[0047] As described above, the external pressure member 9 is an expandable component of the pile breaker, which adopts a modular design and can be selectively installed on the pile breaker body 1 according to different working conditions to achieve flexible installation. When the external pressure member 9 is used, the telescopic member 93 is used to drive the second pressure head 94 to extend outward to squeeze the reinforced concrete column, thereby self-adjusting the angle between the pile breaker and the soil column to keep the pile breaker and the soil column perpendicular;

[0048] When installing the telescopic part 93 on the mounting frame 91, the telescopic part 93 can be passed through the enclosure 92, which can reduce the radial shaking of the telescopic part 93 during the telescopic process. Then, the threaded rod 951 is rotated to move the stop block 952 and the pressure block 953 downward, and the pressure block 953 is used to press the telescopic part 93, and the outer end of the telescopic part 93 is simultaneously blocked by the stop block 952 to ensure the stability of the telescopic part 93. This double-limit fixing mechanism not only ensures the stability of the telescopic part 93 during operation, but also can be quickly disassembled by rotating the threaded rod 951. Compared with the traditional bolt fixing method, the installation efficiency is greatly improved, and it is convenient for later maintenance and component replacement.

[0049] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0050] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A reinforced concrete column crushing and demolition device, comprising a pile breaker body (1), wherein the pile breaker body (1) is composed of a plurality of pile breaking units (2) assembled in a ring shape through a connecting frame (3), wherein the pile breaking unit (2) is composed of a cylinder (21), a piston rod (22) and a pile breaking head (23), and is characterized in that: The piston rod (22) and the pile breaking head (23) are movably connected, and further include a straightening assembly (5), the straightening assembly (5) being arranged inside the cylinder (21) and sleeved on the outside of the pressing section of the piston rod (22), and a movable pressing assembly (6) being provided between the straightening assembly (5) and the piston end of the piston rod (22), and a limit bar (7) for limiting the straightening assembly (5) being provided on the pile breaking head (23); The straightening assembly (5) comprises a fixed collar (51) and a first sleeve (52), wherein the collar (51) and the first sleeve (52) are both movably sleeved on the outside of the pressing section of the piston rod (22), and a first pressure head (53) is mounted on the outer end of the first sleeve (52); The piston rod (22) is provided with an accommodating groove (221) in the axial direction, a push rod (222) is connected to the accommodating groove (221), the pile breaking head (23) is composed of a tip portion (231) and a straight rod portion (232), and the straight rod portion (232) is provided with an embedding groove in the axial direction for the push rod (222) to enter; The push rod (222) is provided with a lifting push bar (223), the straight rod portion (232) is provided with a first guide groove (233), the outer wall of the piston rod (22) is provided with a through groove (224), the limiting bar (7) passes through the first guide groove (233) and the through groove (224), and the cylinder barrel (21) is provided with a limiting groove (8) for the top end of the limiting bar (7) to be embedded.

2. The reinforced concrete column crushing and demolition device according to claim 1, characterized in that: The movable pressing assembly (6) comprises a first guide rod (61), one end of which is fixed to the piston end of the piston rod (22), and the other end of which passes through the collar (51). A second spring (62) is sleeved on the outside of the first guide rod (61), and a movable limiting member (63) is provided inside the collar (51).

3. The reinforced concrete column crushing and demolition device according to claim 2, characterized in that: The movable limiting member (63) includes a second sleeve (631), one end of the second spring (62) is connected to the second sleeve (631), the first guide rod (61) passes through the second sleeve (631), a lifting magnetic positioning block (632) is provided on the outer circumference of the second sleeve (631), and a lifting magnetic push block (64) is installed on the outer wall of the piston rod (22), and the magnetic push block (64) and the magnetic positioning block (632) are magnetically attracted to each other.

4. The reinforced concrete column crushing and demolition device according to claim 3, characterized in that: A second groove (634) extending downward is provided in the collar (51), and a third spring (633) is provided between the bottom end of the magnetic positioning block (632) and the second groove (634).

5. The reinforced concrete column crushing and demolition device according to claim 4, characterized in that: Both sides of the magnetic push block (64) are provided with inclined surfaces. When the magnetic push block (64) is in a natural state, the upper end of the magnetic positioning block (632) is embedded in the second sleeve (631).

6. The reinforced concrete column crushing and demolition device according to claim 1, characterized in that: The outer wall of the first sleeve (52) is provided with a guide hole just large enough for the limiting strip (7) to pass through, and the lengths of the first guide groove (233) and the through groove (224) are both greater than the length of the guide hole.

7. The reinforced concrete column crushing and demolition device according to claim 1, characterized in that: A first groove (2221) is provided on the outside of the push rod (222), and a first spring (2222) is connected between the bottom end of the push bar (223) and the bottom end of the first groove (2221).

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