A cutting device for concrete precast elements

Abstract

The present application relates to a kind of cutting device for concrete prefabricated component, including two groups of preassembled system, wire saw mechanism and support platform, each group of preassembled system includes installation block, assembly block and rotating block in turn in series, it further include the support post installed on rotating block, at least one group of preassembled system is installed with guide rail assembly, wire saw mechanism includes cutting line and guide wheel, cutting line is in turn around four groups of guide wheel, steering seat drives cutting line to move along track and complete cutting.The present application can cut out the hole structure that is completely consistent with the shape of track on the concrete prefabricated component to be cut, solve the problem in the cutting of concrete prefabricated component.Length compensation mechanism makes the present application not only can cut circular hole, but also can cut square hole or other shape hole.Because the diameter of cutting line is much smaller than electric circular saw, so its turning radius is very small when turning, can cut out the shape of approximate right angle at corner, and will not appear redundant cutting part and make the shape of cutting arc.

Description

Technical Field

[0001] This invention relates to the field of sawing precast concrete components, and more specifically to a cutting device for precast concrete components. Background Technology

[0002] Precast concrete components refer to concrete structural parts, such as beams, slabs, and columns, that are manufactured in a factory. In the fields of building construction and prefabricated construction, the application of precast concrete components improves construction efficiency and quality. However, in actual construction, it is often necessary to drill holes in precast components (such as precast wall panels, floor slabs, beams, and columns) on-site to meet the needs of pipeline laying, equipment installation, or connection nodes. Currently, common tools for drilling holes include electric circular saws and wire saws.

[0003] The technical drawback of circular saws in practical applications is that they can only produce holes of a single shape. Traditional circular saws can only process circular holes, while rectangular, square or other irregularly shaped holes (such as groove holes, pre-reserved installation holes, etc.) are often required in actual engineering. When cutting straight holes, the circular saw is limited by its shape, size and wall thickness. It is difficult to keep the turning trajectory of the circular saw at a right angle during cutting. The corners will inevitably be cut into arcs. The excess cut-off part not only affects the hole opening effect, but also affects the strength of the prefabricated components.

[0004] Existing wire saws can only be used to cut precast components in half, not to create holes in wall panels. Therefore, there is an urgent need to develop a cutting device that can create holes in precast concrete components. Summary of the Invention

[0005] This invention provides a cutting device for precast concrete components to solve the technical problem in the prior art of making it difficult to drill holes in precast concrete components with cross-sectional shapes that meet design requirements.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A cutting device for precast concrete components includes two sets of pre-assembly systems and a wire saw mechanism disposed in the two sets of pre-assembly systems. It also includes a support platform for supporting the pre-assembly systems. Each set of pre-assembly systems includes a mounting block, an assembly block, a support column, and a rotating block. The mounting block, assembly block, and rotating block are connected in series. The support platform is detachably connected to the assembly block. The mounting block is fixed on the assembly block. The two sets of pre-assembly systems are detachably connected to the precast concrete component to be cut through the mounting block. The rotating block is rotatably mounted on the assembly block. One end of the support column is fixed to the rotating block, and the other end extends out.

[0008] Each pre-assembled system is equipped with a guide rail assembly, which is fixed to the assembly block. The guide rail assembly includes a rail and a fixed beam, and the central axis of the rail is consistent with the rotation axis of the rotating block.

[0009] The wire saw mechanism includes a cutting wire and guide wheels. Two guide wheels are arranged along the extension direction of the support column in each pre-assembly system. The cutting wire passes around four sets of guide wheels. The beginning and end of the cutting wire can form a cutting loop after being fixed, or they can pass through the wire hole opened on the precast concrete component to be cut in an unconnected state.

[0010] Furthermore, the track is a circular track.

[0011] Furthermore, the mounting block is a cylindrical structure including an annular flange and a cylindrical body. The cylindrical bodies of the mounting blocks in the two pre-assembly systems are plugged together, and the annular flange is locked and fixed by long bolts and nuts to adjust the distance between them. The long bolts are located near the cylindrical body, and the annular flange is used to clamp and fix the precast concrete component to be cut.

[0012] Furthermore, the cantilever end of the support column is also provided with a steering seat, which is in coordination with the support column for guiding movement. A spring is provided between the support column and the steering seat, and the spring is used to drive the steering seat to move and reset along the support column for guiding movement.

[0013] Furthermore, it also includes a length compensation mechanism, which is used to compensate for the change in the cutting line length caused by the change in the distance between the bogie and the center axis of the track.

[0014] Furthermore, the support column is a hollow structure, and the steering seat includes a insert tube whose shape matches the shape of the corresponding support column for insertion.

[0015] Furthermore, the length compensation mechanism includes a reversing wheel located at the left end of the support column and a tensioning wheel located at the right end of the insert tube. The cutting line passes around the guide wheel at the steering seat, then passes around the tensioning wheel and the reversing wheel in sequence, and finally passes around the guide wheel at the rotating block on the same side. The tensioning wheel is slidably mounted on the insert tube in the left-right direction. A compensation spring is provided between the tensioning wheel seat for mounting the tensioning wheel and the right end of the insert tube. The compensation spring can be stretched as the tensioning wheel moves to the left when the steering seat extends, and can drive the tensioning wheel to reset to the right to tension the cutting line when the cutting line slacks.

[0016] Furthermore, the insert tube is a stepped shaft section, with its small-diameter section inserted into the support column, and the spring is sleeved around the large-diameter section so that it is clamped between the steering seat and the rotating block.

[0017] Furthermore, the steering seat is provided with a limiting stop that cooperates with the outer contour of the track.

[0018] The beneficial effects of this invention are:

[0019] 1. In this invention, the cutting device comprises two parts. The two parts are clamped and fixed to both sides of the precast concrete component to be cut with different thicknesses by long bolts and nuts, thereby achieving fixation on the precast concrete component. Then, a wire hole is opened on the precast concrete component to be cut, so that one end of the cutting wire passes through the wire hole and is connected to the other end to form a closed loop. Then, the drive motor is started to drive the cutting wire to rotate in a cycle to achieve cutting. With the rotation of the rotating block, the steering seat that cooperates with the track stop can move along the track contour and cut a hole on the precast concrete component that is consistent with the shape of the track contour.

[0020] 2. In this invention, the length compensation mechanism enables it to cut not only circular holes, but also square holes or other irregularly shaped holes. Because the diameter of the cutting line is much smaller than that of a circular saw, its turning radius is extremely small, allowing it to cut near-right-angle shapes at corners without producing excess material that results in an arc-shaped cut.

[0021] 3. By guiding the movement of the cutting line through the guide rail assembly, the present invention provides more precise control over the travel trajectory compared to manually controlling the cutting direction of the electric circular saw. Attached Figure Description

[0022] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the invention are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0024] Figure 2 This is a front view;

[0025] Figure 3 This is a sectional view along line A;

[0026] Figure 4 This is a sectional view along direction B;

[0027] Figure 5 This is a schematic diagram of the cutting line routing;

[0028] Figure 6 This is a magnified view of a portion of point B;

[0029] Figure 7 This is a schematic diagram of the structure of Example 4.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Support platform; 2. Mounting block; 3. Assembly block; 4. Support column; 5. Guide rail assembly; 6. Steering seat; 7. Wire saw mechanism; 8. Rotating block; 9. Length compensation mechanism; 10. Spring; 21. Annular flange; 22. Cylindrical body; 23. Long bolt; 24. Nut; 51. Track; 52. Fixed beam; 63. Rope outlet end; 64. Rope retraction end; 65. Insert tube; 66. Limit stop; 71. Cutting line; 72. Guide wheel; 721. Guide wheel one; 722. Guide wheel two; 91. Reversing wheel; 92. Tensioning wheel; 93. Compensating spring. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] The number of any elements in the accompanying drawings is for illustrative purposes only and not as a limitation, and any naming is for distinction only and has no limiting meaning.

[0034] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0035] Embodiment 1 of a cutting device for precast concrete components provided by the present invention:

[0036] like Figures 1 to 6 As shown, the invention includes two pre-assembly systems and a wire saw mechanism installed within each system. Each pre-assembly system is equipped with a guide rail assembly 5 to guide the wire saw mechanism 7. The guide rail assemblies 5 on both pre-assembly systems are identical. Each pre-assembly system is supported by a support platform 1, and its center height can be adjusted via the support platform 1. The two pre-assembly systems are symmetrically arranged, and each system includes a mounting block 2, an assembly block 3, a support column 4, a steering seat 6, and a rotating block 8. For clarity, only the front guide rail assembly 5 is shown in this invention; the rear guide rail assembly 5 is omitted.

[0037] Mounting block 2 has a cylindrical structure, including annular flange 21 and cylindrical body 22. The cylindrical bodies 22 of mounting blocks 2 in the two pre-assembly systems are inserted together. The annular flange 21 is locked and fixed by long bolts 23 and multiple nuts 24. Adjusting the position of the nuts 24 can adjust the distance between the annular flanges 21 of the two mounting blocks 2 after locking. After the distance between the annular flanges 21 at the ends of the two mounting blocks 2 is adjusted, they can be clamped and fixed to the prefabricated component to be cut. In this embodiment, three nuts 24 are provided. One nut 24 is located behind the front annular flange 21, and the other two nuts 24 are clamped on both sides of the rear annular flange 21.

[0038] It is important to emphasize that, on the precast concrete component to be cut, an installation hole for mounting the mounting block 2 is first cut at the location where the hole is to be drilled using an electric circular saw. The size of the installation hole is smaller than the size of the hole to be drilled and is within the range of the hole to be drilled. This installation hole allows the long bolts 23 mounted on the cylindrical body 22 and the annular flange 21 to be inserted into it, and the opening edge of the installation hole can be clamped by the annular flange 21.

[0039] The function of the support platform 1 is to support the pre-assembled system and the cut-off precast concrete components, preventing the pre-assembled system from falling directly along with the cut-off precast concrete components and affecting the normal cutting of the cutting line 71. It is important to emphasize that the support platform 1 needs to have a height adjustment function to ensure that the centerline of the pre-assembled system is aligned with the centerline of the hole to be drilled. Since height-adjustable support platforms are existing technology, their structure will not be described in detail in this application.

[0040] Assembly block 3 is fixed to the end of mounting block 2 away from the precast component to be cut. Therefore, assembly block 3 is also fixed to the precast component to be cut along with mounting block 2.

[0041] The rotating block 8 is rotatably mounted on the end of the assembly block 3 away from the prefabricated component to be cut, thus the rotating block 8, assembly block 3, and mounting block 2 are connected in series. A mandrel is located in the center of the assembly block 3, with its portion extending outwards from the rotating block 8. The guide rail assembly 5 is fixed to this mandrel. The guide rail assembly 5 includes a track 51 whose shape and size match the hole to be drilled, and a fixing beam 52 located inside the track 51 for reinforcement and fixation. The fixing beam 52 is cross-shaped, and the track 51 is fixed to the assembly block 3 via the fixing beam 52. The fixing position of the track 51 and the assembly block 3 is located at the center of the track 51. By fixing the fixing beam 52 to the extended portion of the mandrel, the guide rail assembly 5 is positioned outside the rotating block 8.

[0042] The support column 4 is fixed to the rotating block 8, and its extension direction is perpendicular to the extension direction of the rotating block 8, assembly block 3, and mounting block 2 connected in series. The steering seat 6 is located at the cantilever end of the support column 4. The support platform 1 is mounted below the assembly block 3 to support and fix the assembly block 3.

[0043] The wire saw mechanism 7 includes a cutting wire 71 and guide wheels 72. One guide wheel 72 is located in the steering seat 6, and another guide wheel 72 is located at the end of the rotating block 8 furthest from the precast component to be cut. The cutting wire 71 sequentially passes around the four guide wheels 72 in the two sets of pre-assembly systems to form a cutting loop. Rotation of at least one guide wheel 72 drives the cutting wire 71 to circulate. It is important to emphasize that the cutting wire 71, wrapped around the guide wheels 72 at the ends of the two rotating blocks 8, passes through the center line of the mandrel of the assembly block 3. Furthermore, the rotation center line of the rotating block 8 coincides with the center line of the mandrel of the assembly block 3, and the center of the hole to be drilled on the precast concrete component coincides with the center line of the mandrel of the assembly block 3. This ensures that when the rotating block 8 drives the support column 4 to rotate, it will rotate around the center position of the hole to be drilled on the precast concrete component to be cut.

[0044] In this embodiment, the pre-assembly system is pre-assembled, and the guide rail assembly 5 is also pre-assembled on the pre-assembly system. The corresponding cutting line 71, guide wheel 72, and corresponding drive part are all pre-integrated into the corresponding components. Therefore, after the two pre-assembly systems are fixed together by long bolts 23 and nuts 24, it is only necessary to connect and fix the two ends of the cutting line 71 together to realize the assembly of the device.

[0045] The specific installation steps of the pre-assembled system are as follows: First, fix the mounting block 2 onto the assembly block 3, then rotate the rotating block 8 onto the assembly block 3, fix the support column 4 onto the rotating block 8, and install the steering seat 6 at the cantilever end of the support column 4. When installing the guide rail assembly 5, simply fix it onto the spindle protruding from the rotating block 8 on the assembly block 3.

[0046] The drive unit providing power to the entire cutting device includes drive motor one and drive motor two. In this embodiment, drive motor one is located in assembly block 3, and its function is to drive the rotating block 8 to rotate, thereby driving the support column 4 and the steering seat 6 to rotate. Drive motor two drives the guide wheel 72 to rotate, thereby promoting the circulation of the cutting line 71. It can be located at any of the guide wheels 72. The specific structure and driving principle of the drive motors are existing technologies and will not be described in detail in this application.

[0047] In practice, for the precast concrete component to be cut, a threading hole is first drilled in the precast concrete component using a drilling tool. The threading hole is located on the trajectory of the hole to be drilled. After fixing other parts to the precast concrete component to be cut, the cutting line 71 is passed around each guide wheel in sequence. Then, before the beginning and end of the cutting line 71 are closed, one end of the cutting line 71 is led out from the rope outlet 63 on the steering seat 6, passes through the threading hole, and is then connected to the other end of the cutting line 71 led out from the rope retraction end 64 to form a cutting loop.

[0048] In this embodiment, the track 51 is circular, and each point on the track 51 is at the same distance from the center of the hole to be opened. Therefore, when the support column 4 rotates around the central axis of the hole to be opened, the cutting line 71 traveling along the track 51 can cut a circular hole that matches the shape of the track 51 on the precast concrete component.

[0049] In this embodiment, since the support platform 1 is sandwiched between two sets of steering seats, it will interfere with the movement of the cutting line 71 caused by the rotation of the rotating block 8. Therefore, when cutting, the support platform 1 is not fixed first, but the invention is fixed to the precast concrete component to be cut only by the mounting block 2. When the wire saw mechanism 7 cuts, it first cuts the lower half; then the support platform 1 is installed so that it stands on the foundation and supports the pre-assembled system, and then the upper half is cut to complete the opening.

[0050] Example 2:

[0051] The difference between Embodiment 2 and Embodiment 1 is that: a spring 10 is provided at the end of the support column 4, the steering seat 6 is sleeved on the end of the support column 4, the spring 10 is clamped between the steering seat 6 and the support column 4, and the two ends of the spring 10 are fixed on the steering seat 5 and the support column 4 respectively. Its function is to adjust the distance between the rotation center line of the steering seat 6 and the rotating block 8, and pull the steering seat 6 away from the support column 4 to reset along the extension direction of the support column 4.

[0052] Meanwhile, a limiting stop 66 is provided on the steering seat 6 near the track 51, which cooperates with the outer contour of the track 51. The limiting stop 66 blocks the outside of the track 51 so that the limiting stop 66 moves along the outer contour of the track 51.

[0053] Example 3:

[0054] The difference between Embodiment 3 and Embodiment 2 is that the track 51 is a square track, a rectangular track, or a non-rotating track of other shapes. In this case, the distance from different points on the track 51 to the center of the hole to be opened is different. Therefore, a length compensation mechanism 9 needs to be set to avoid the problem of discontinuous cuts caused by the cutting line 71 not being tensioned.

[0055] The length compensation mechanism 9 is installed between the support column 4 and the steering seat 6, and specifically includes a reversing wheel 91, a tensioning wheel 92, and a compensation spring 93. The support column 4 is a hollow structure and is fixed on the rotating block 8. The steering seat 6 includes an insert tube 65, the shape of which matches the shape of the support column 4 and is inserted therein so that the steering seat 6 can be guided to move along the support column 4.

[0056] A tensioning wheel 92 is provided at the end of the insert tube 65 near the rotating block 8, and a reversing wheel 91 is provided at the end of the support column 4 near the steering seat 6. A long groove is provided on the insert tube 65 to allow space for the reversing wheel 91. For a more intuitive description, that is... Figure 3 In the orientation shown, a tensioning wheel 92 is installed at the right end of the insertion tube 65, and a reversing wheel 91 is installed at the left end of the support column 4.

[0057] It is important to emphasize that the tensioning wheel 92 is slidably mounted on the insert tube 65 in a left-right direction, and a compensating spring 93, which is a tension spring, is provided between the tensioning wheel seat for mounting the tensioning wheel 92 and the right end of the insert tube 65. When the distance between the steering seat 6 and the support column 4 is closest, the compensating spring 93 is in a naturally retracted or slightly extended state; when the distance between the steering seat 6 and the support column 4 increases, the compensating spring 93 is extended, and the tensioning wheel 92 moves to the left to compensate for the change in length caused by the leftward extension of the steering seat 6.

[0058] The cutting line 71 passes sequentially around the guide wheel 721 at the steering seat 6, the tension wheel 92 on the insert tube 65, and the reversing wheel 91 on the support column 4 before reaching the guide wheel 722 at the rotating block 8. Then, it passes sequentially around the guide wheel 722 at the rotating block 8, the reversing wheel 91 in the support column 4, and the tension wheel 92 in the insert tube 65 in another pre-assembly system before connecting to form a closed loop.

[0059] The cutting wire is the beaded diamond wire disclosed in the prior art, and its connector connection method is the same as that in the prior art, which will not be described in detail in this application.

[0060] When the steering seat 6 moves along the track 51, the distance between the steering seat 6 and the central axis of the track 51 will increase by L0. At this time, the spring 10 will extend by L0 simultaneously. Without considering the effect of the length compensation mechanism 9, the total length of the rope loop will increase by 2L0.

[0061] The changes in rope length in length compensation mechanism 9 are as follows: Figure 5When the steering seat 6 moves away from the rotating block 8, the guide wheel 721 at the steering seat 6 moves downward by L0. At this time, the tension wheel 92 moves downward by L0 / 2, which keeps the rope length between the reversing wheel 91 and the guide wheel 721 constant. Therefore, the length of the cutting line in the length compensation mechanism 9 on one side remains unchanged. Thus, after introducing the length compensation mechanisms 9 on both sides, the total length of the rope loop remains unchanged. That is to say, the cutting line 71 can still maintain tension and can complete the cutting smoothly.

[0062] Example 4:

[0063] The difference between Embodiment 4 and Embodiment 1, 2, or 3 is that Assembly Block 3 protrudes from Rotating Block 8, and Support Platform 1 is located outside the two Rotating Blocks 8. Therefore, the cutting line 71 will not be interfered with by Support Platform 1 during the rotation of Support 4. The cutting line 71 can completely cut off the part to be cut after rotating a full circle with Support 4. The specific structure is as follows: Figure 7 As shown.

[0064] In this embodiment, the support platform 1 can be directly pre-assembled with the pre-assembly system into an integral part. When cutting is required, the two integral parts are fixed on the precast concrete block to be cut by the mounting block 2. Then, the two ends of the cutting line 71 are connected and the invention is started, which can drive the cutting line 71 to move along the predetermined trajectory on the track 51, thereby completing the cutting of holes of a specific shape.

[0065] Based on the above description in this specification, those skilled in the art will also understand that the following terms, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0066] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A cutting device for precast concrete components, characterized in that: The device includes two pre-assembly systems and a wire saw mechanism installed in the two pre-assembly systems. It also includes a support platform for supporting the pre-assembly systems. Each pre-assembly system includes a mounting block, an assembly block, a support column, and a rotating block. The mounting block, assembly block, and rotating block are connected in series. The support platform is detachably connected to the assembly block. The mounting block is fixed on the assembly block. The two pre-assembly systems are detachably connected to the precast concrete component to be cut through the mounting block. The rotating block is rotatably installed on the assembly block. One end of the support column is fixed to the rotating block, and the other end extends out. Each pre-assembly system is equipped with a guide rail assembly, which is fixed to the assembly block. The guide rail assembly includes a track and a fixed beam. The central axis of the track is consistent with the rotation axis of the rotating block. The wire saw mechanism includes a cutting wire and guide wheels. Two guide wheels are arranged along the extension direction of the support column in each pre-assembly system. The cutting wire passes through four sets of guide wheels. The beginning and end of the cutting wire can form a cutting loop after being fixed, or they can pass through the wire hole opened on the precast concrete component to be cut in an unconnected state. The track is a circular track or a track that is not a rotating body; The cantilever end of the support column is also provided with a steering seat, which is in coordination with the support column for guiding movement. A spring is provided between the support column and the steering seat, and the spring is used to drive the steering seat to move and reset along the support column for guiding movement. It also includes a length compensation mechanism, which is used to compensate for the change in the length of the cutting line caused by the change in the distance between the bogie and the center axis of the track.

2. The cutting device for precast concrete components according to claim 1, characterized in that: The mounting block is a cylindrical structure including an annular flange and a cylindrical body. The cylindrical bodies of the mounting blocks in the two pre-assembly systems are connected by insertion, and the annular flange is locked and fixed by long bolts and nuts to adjust the distance between them. The long bolts are set near the cylindrical body, and the annular flange is used to clamp and fix the precast concrete components to be cut.

3. A cutting device for precast concrete components according to claim 2, characterized in that: The support column is a hollow structure, and the steering seat includes a insert tube whose shape matches the shape of the corresponding support column for insertion.

4. A cutting device for precast concrete components according to claim 3, characterized in that: The length compensation mechanism includes a reversing wheel located at the left end of the support column and a tensioning wheel located at the right end of the insert tube. The cutting line passes around the guide wheel at the steering seat, then passes around the tensioning wheel and the reversing wheel in sequence, and then passes around the guide wheel at the rotating block on the same side. The tensioning wheel is slidably mounted on the insert tube in the left-right direction. A compensation spring is provided between the tensioning wheel seat for mounting the tensioning wheel and the right end of the insert tube. The compensation spring can be stretched as the tensioning wheel moves to the left when the steering seat is extended, and can drive the tensioning wheel to reset to the right to tension the cutting line when the cutting line is slack.

5. A cutting device for precast concrete components according to claim 4, characterized in that: The insert tube is a stepped shaft section, with its small diameter section inserted into the support column, and the spring is sleeved around the large diameter section so that it is clamped between the steering seat and the rotating block.

6. A cutting device for precast concrete components according to claim 2, characterized in that: The steering seat is provided with a limiting stop that cooperates with the outer contour of the track.

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