Cutting device for precast concrete component

Abstract

The invention relates to a cutting device for a precast concrete component, which comprises two groups of preassembly systems, a fret saw mechanism and a support table, each group of preassembly system comprises a mounting block, an assembly block and a rotating block which are sequentially connected in series, and further comprises a support column mounted on the rotating block, and at least one group of preassembly system is provided with a guide rail assembly; the fret saw mechanism comprises a cutting line and guide wheels, and the cutting line is sequentially wound around the four sets of guide wheels and the steering base to drive the cutting line to move along the track to complete cutting. The hole structure completely consistent with the track in shape can be cut in the concrete prefabricated part to be cut, and the problem in the cutting process of the concrete prefabricated part is solved. And due to the length compensation mechanism, not only can circular holes be cut, but also square holes or special-shaped holes in other shapes can be cut. Due to the fact that the wire diameter of the cutting wire is far smaller than that of the electric circular saw, the turning radius is extremely small when the electric circular saw turns, a shape similar to a right angle can be cut at the corner, and the phenomenon that the cut shape is arc due to the fact that redundant cut parts do not appear is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sawing of concrete prefabricated components, in particular to a cutting device for concrete prefabricated components. BACKGROUND

[0002] Concrete prefabricated components refer to concrete structural components such as beams, slabs, columns, etc. that are completed in the factory stage. In the field of construction and assembly type construction, the application of concrete prefabricated components improves construction efficiency and construction quality. However, in the actual construction process, it is often necessary to make on-site openings in prefabricated components such as prefabricated wall panels, floor slabs, beams and columns to meet the needs of pipeline laying, equipment installation or connecting joints. At present, common opening tools include electric circular saws and rope saws.

[0003] The technical defects of electric circular saws in practical application are that the opening shape is single, and the traditional circular cutting saw can only process circular holes, while in actual engineering, rectangular, square or other special-shaped holes (such as wire slot holes, reserved mounting holes, etc.) are often required. When cutting straight-line holes, the electric circular saw is limited by its shape, size and wall panel thickness, and the turning trajectory of the electric circular saw is difficult to maintain a right angle, and an arc will inevitably be cut at the corner, which not only affects the opening effect, but also affects the strength of the prefabricated component.

[0004] The existing rope saw can only be used to cut off the prefabricated component at the waist, and cannot be used to open holes in the wall panel. Therefore, it is urgent to develop a cutting device that can open holes in concrete prefabricated components. SUMMARY

[0005] The present application provides a cutting device for concrete prefabricated components to solve the technical problem that it is difficult to open holes with a cross-sectional shape that meets the design requirements on concrete prefabricated components in the prior art.

[0006] To solve the above problems, the present application adopts the following technical solutions:

[0007] A cutting device for concrete prefabricated components, comprising two groups of pre-assembly systems and a wire saw mechanism arranged in the two groups of pre-assembly systems, and a support table for supporting the pre-assembly systems, each group of pre-assembly systems comprising a mounting block, an assembly block, a support column and a rotating block, the mounting block, the assembly block and the rotating block being connected in series, the support table being detachably connected with the assembly block, the mounting block being fixed on the assembly block, the two groups of pre-assembly systems being detachably connected on the concrete prefabricated component to be cut through the mounting block, the rotating block being rotatably mounted on the assembly block, one end of the support column being fixed on the rotating block and the other end of the support column being overhanging;

[0008] Each of the pre-assembly systems is provided with a guide rail assembly fixed on the assembly block, the guide rail assembly comprises a rail and a fixed beam, the central axis of the rail is consistent with the rotation axis of the rotating block;

[0009] The wire saw mechanism comprises a cutting wire and guide wheels, two guide wheels are arranged along the extension direction of the support in each of the pre-assembly systems, the cutting wire passes through the four guide wheels, the leading and trailing ends of the cutting wire can form a cutting loop after being fixed or pass through the threading hole provided on the concrete precast component to be cut in the unconnected state.

[0010] Further, the rail is a ring-shaped rail.

[0011] Further, the mounting block is a cylindrical structure comprising a ring-shaped protrusion and a cylindrical body, the cylindrical bodies of the mounting blocks in the two pre-assembly systems are connected in a plug-in manner, the ring-shaped protrusions are locked and fixed by long bolts and nuts to adjust the distance between them, the long bolts are arranged near the cylindrical bodies, and the ring-shaped protrusions are used for clamping and fixing the concrete precast component to be cut.

[0012] Further, the overhanging end of the support is further provided with a deflection seat, the deflection seat is guided and moved in cooperation with the support, a spring is arranged between the support and the deflection seat, and the spring is used for driving the deflection seat to reset along the guide movement of the support.

[0013] Further, a length compensation mechanism is further included, and the length compensation mechanism is used for compensating the change of the length of the cutting wire caused by the change of the distance between the deflection seat and the central axis of the rail.

[0014] Further, the support is a hollow structure, and the deflection seat comprises an insertion pipe, the shape of the insertion pipe is consistent with the shape of the corresponding support to be inserted into the support.

[0015] Further, the length compensation mechanism comprises a reversing wheel arranged at the left end of the support and a tensioning wheel arranged at the right end of the insertion pipe, after the cutting wire passes through the guide wheel at the deflection seat, the cutting wire passes through the tensioning wheel and the reversing wheel in sequence and then passes through the guide wheel at the rotating block on the same side, the tensioning wheel is slidably installed on the insertion pipe in the left-right direction, a compensation spring is arranged between the tensioning wheel seat for installing the tensioning wheel and the right end of the insertion pipe, the compensation spring can be stretched when the deflection seat is stretched to the left, and the compensation spring can drive the tensioning wheel to reset to the right to tension the cutting wire when the cutting wire is relaxed.

[0016] Further, the insertion pipe is a stepped shaft section, the small-diameter section of the insertion pipe is inserted into the support, and the spring is sleeved on the periphery of the large-diameter section of the insertion pipe so as to be clamped between the deflection seat and the rotating block.

[0017] Further, the deflection seat is provided with a limiting stop portion which is in abutting cooperation with the outer contour of the rail.

[0018] The beneficial effects of the present application are:

[0019] 1、The cutting device comprises two parts, and the two parts are clamped and fixed on the two sides of the concrete prefabricated member with different thicknesses through long bolts and nuts, so that the fixing on the concrete prefabricated member is realized, then a threading hole is formed on the concrete prefabricated member to be cut, one end of the cutting wire is connected with the other end through the threading hole to form a closed loop, then the driving motor is started to drive the cutting wire to rotate circularly, and the cutting is realized, and the rotation of the rotating block enables the steering seat matched with the track stop to walk along the track contour, and the hole with the same shape as the track contour is cut on the concrete prefabricated member.

[0020] 2、The length compensation mechanism is arranged, so that the present application can not only cut a circular hole, but also cut a square hole or a hole with other shapes. Since the diameter of the cutting wire is much smaller than that of the electric circular saw, the turning radius is very small when the cutting wire turns, and an approximately right angle shape can be cut at the corner, and the cut shape is not an arc shape due to the cutting of the excess part.

[0021] 3、The movement of the cutting wire is guided through the guide rail assembly, and compared with the manual control of the cutting direction of the electric circular saw, the control of the walking track of the present application is more accurate. DETAILED DESCRIPTION

[0022] The above and other objects, features and advantages of the exemplary embodiments of the present application will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which several embodiments of the present application are shown by way of example, and wherein the same or corresponding elements refer to the same or corresponding parts wherein:

[0023] Figure 1 is a structural schematic view of embodiment one of the present application;

[0024] Figure 2 is a front view;

[0025] Figure 3 is a sectional view in direction A;

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

[0027] Figure 5 is a schematic view of the wire routing of the cutting wire;

[0028] Figure 6 is a local enlarged schematic view of B;

[0029] Figure 7 is a structural schematic view of embodiment four.

[0030] Description of reference numerals:

[0031] 1. Support platform; 2. Mounting block; 3. Assembly block; 4. Pillar; 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 collection end; 65. Insertion tube; 66. Limit stop; 71. Cutting line; 72. Guide wheel; 721. Guide wheel 1; 722. Guide wheel 2; 91. Reversing wheel; 92. Tensioning wheel; 93. Compensation spring. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are only some embodiments, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] Any number of elements in the drawings is for illustration and not limitation, and any naming is for distinction only and does not have any limiting meaning.

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

[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 present invention comprises two pre-assembly systems and wire saw mechanisms disposed within the two pre-assembly systems. The pre-assembly systems are also equipped with guide rail assemblies 5 for guiding the wire saw mechanisms 7. The guide rail assemblies 5 on the two pre-assembly systems are identical. The pre-assembly systems are supported by a support platform 1, and the center height of the pre-assembly systems can be adjusted via the support platform 1. The two pre-assembly systems are symmetrically disposed, each comprising a mounting block 2, an assembly block 3, a support column 4, a steering seat 6, and a rotating block 8. To clearly illustrate the structure of the present invention, only the front guide rail assembly 5 is illustrated, omitting the rear guide rail assembly 5.

[0037] The mounting block 2 is a cylindrical structure, comprising a ring-shaped protrusion 21 and a cylindrical body 22, the cylindrical body 22 of the mounting block 2 in the two sets of pre-assembly systems is inserted, and the ring-shaped protrusion 21 is locked and fixed by a long bolt 23 cooperating with a plurality of nuts 24, the position of the adjusting nut 24 can adjust the distance between the ring-shaped protrusions 21 of the two mounting blocks 2 after locking. After the distance between the ring-shaped protrusions 21 at the ends of the two mounting blocks 2 is adjusted, they can be clamped and fixed on the prefabricated component to be cut. In the embodiment, three nuts 24 are provided, one nut 24 is located behind the front ring-shaped protrusion 21, and the other two nuts 24 are clamped on both sides of the rear ring-shaped protrusion 21.

[0038] It should be emphasized here that the concrete prefabricated component to be cut is first cut at the position to be drilled by an electric circular saw to form a mounting hole for mounting the mounting block 2, the size of the mounting hole is smaller than the size of the hole to be drilled and the mounting hole is within the range of the hole to be drilled. The mounting hole can be inserted into the long bolt 23 mounted on the cylindrical body 22 and the ring-shaped protrusion 21, and the hole mouth of the mounting hole can also be clamped by the ring-shaped protrusion 21.

[0039] The support table 1 is used to support the pre-assembly system and the concrete prefabricated component to be cut, so as to avoid the pre-assembly system from falling directly with the concrete prefabricated component to be cut and affecting the normal cutting of the cutting line 71. It should be emphasized that the support table 1 needs to have a height adjustment function to adjust the center line of the pre-assembly system to be consistent with the center line of the hole to be drilled. Since the height-adjustable support table is a prior art, its structure will not be described in detail in this application.

[0040] The assembly block 3 is fixed to the end of the mounting block 2 away from the prefabricated component to be cut, so the assembly block 3 is also fixed to the prefabricated component to be cut together with the mounting block 2.

[0041] The rotating block 8 is rotatably mounted at the end of the assembly block 3 away from the prefabricated component to be cut, so the rotating block 8, the assembly block 3 and the mounting block 2 are connected in series. The middle part of the assembly block 3 is provided with a mandrel, the mandrel part of which extends outwardly from the rotating block 8, and the guide rail assembly 5 is fixed on the mandrel. The guide rail assembly 5 comprises a track 51 which is in shape and size consistent with the hole to be drilled, and a fixed beam 52 which is inside the track 51 and plays a role of strengthening and fixing. The fixed beam 52 is in the shape of a cross, and the track 51 is fixed on the assembly block 3 through the fixed beam 52. The fixed position of the track 51 and the assembly block 3 is located at the center position of the track 51. Fixing the fixed beam 52 on the extended part of the mandrel can make the guide rail assembly 5 located outside the rotating block 8.

[0042] The support column 4 is fixed on the rotating block 8, and the extending direction of the support column 4 is perpendicular to the extending direction of the rotating block 8, the assembling block 3 and the part of the mounting block 2 connected in series. The steering seat 6 is arranged on the overhanging end of the support column 4. The support table 1 is arranged below the assembling block 3 to support and fix the assembling block 3.

[0043] The wire saw mechanism 7 comprises a cutting wire 71 and guide wheels 72. One guide wheel 72 is arranged in the steering seat 6, and one guide wheel 72 is arranged on the end of the rotating block 8 away from the prefabricated component to be cut. The cutting wire 71 is wound around the four guide wheels 72 in the two pre-assembly systems to form a cutting loop. At least one guide wheel 72 rotates to drive the cutting wire 71 to circulate. It is emphasized that the cutting wire 71 wound around the guide wheels 72 on the ends of the rotating blocks 8 passes through the center line of the mandrel of the assembling block 3. In combination with the fact that the rotation center line of the rotating block 8 coincides with the center line of the mandrel of the assembling block 3, and the center of the hole to be opened on the prefabricated concrete component coincides with the center line of the mandrel of the assembling block 3, it can be ensured that when the rotating block 8 drives the support column 4 to rotate, the rotating block 8 will rotate around the center of the hole to be opened on the prefabricated concrete component to be cut.

[0044] In the embodiment, the pre-assembly system is pre-assembled, the guide rail assembly 5 is pre-assembled on the pre-assembly system, and the cutting wire 71, the guide wheels 72 and the corresponding driving parts are pre-integrated in the corresponding parts. Therefore, after the two pre-assembly systems are fixed as a whole by the long bolts 23 and the nuts 24, only the two ends of the cutting wire 71 need to be connected and fixed to realize the assembly of the device.

[0045] The specific installation steps of the pre-assembly system are as follows: first, the mounting block 2 is fixed on the assembling block 3, then the rotating block 8 is rotatably installed on the assembling block 3, the support column 4 is fixed on the rotating block 8, and the steering seat 6 is installed on the overhanging end of the support column 4. When the guide rail assembly 5 is installed, it is fixed on the mandrel of the assembling block 3 protruding from the rotating block 8.

[0046] The driving parts for providing power for the whole cutting device comprise a driving motor one and a driving motor two. In the embodiment, the driving motor one is arranged in the assembling block 3, and its function is to drive the rotating block 8 to rotate to drive the support column 4 and the steering seat 6 to rotate. The function of the driving motor two is to drive the guide wheels 72 to rotate to promote the circulation of the cutting wire 71, and it can be arranged at any one of the guide wheels 72. The specific structure and driving principle of the driving motor are prior art, and will not be described in detail in the application.

[0047] In a specific implementation, for the concrete precast component to be cut, a drilling tool is used to form a threading hole on the concrete precast component, and the threading hole is located on the track to be formed. After other parts are fixed on the concrete precast component to be cut, the cutting wire 71 is wound around each guide wheel in turn, and before the head of the cutting wire 71 is closed at the leading and trailing ends, the head of the cutting wire 71 is led out from the rope outlet end 63 of the turning seat 6, passes through the threading hole, and is connected with the other head of the cutting wire 71 led out from the rope collection end 64 to form a cutting ring.

[0048] In this embodiment, the track 51 is annular, and each point on the track 51 is equidistant from the center of the hole to be formed. Therefore, when the support column 4 rotates around the central axis of the hole to be formed, the cutting wire 71 walking along the track 51 can cut a circular hole on the concrete precast component, which is consistent with the shape of the track 51.

[0049] In this embodiment, the support table 1 is clamped between the two sets of turning seats, and the turning block 8 is interfered by the support table 1 during the movement of the cutting wire 71. Therefore, during cutting, the support table 1 is not fixed, and the invention is fixed on the concrete precast component to be cut only by the mounting block 2. When the wire saw mechanism 7 cuts, the lower half is cut first, then the support table 1 is installed, the support table 1 stands on the foundation and supports the preassembly system, and then the upper half is cut to complete the hole forming.

[0050] Embodiment Two:

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

[0052] At the same time, the turning seat 6 close to the track 51 is provided with a limiting stop portion 66 which is stopped by the outer contour of the track 51 to move along the outer contour of the track 51.

[0053] Embodiment Three:

[0054] The difference between Embodiment Three and Embodiment Two is that the track 51 is a square track, a rectangular track, or a non-rotating body track with other shapes. In this case, different points on the track 51 are different from the center of the hole to be formed. Therefore, a length compensation mechanism 9 needs to be provided to avoid the problem of discontinuous cutting caused by the cutting wire 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 hollow and fixed on the rotating block 8, and the steering seat 6 includes a plug-in pipe 65 which is shaped to fit in the support column 4 so that the steering seat 6 can move along the support column 4.

[0056] The tensioning wheel 92 is arranged at the end of the plug-in pipe 65 close to the rotating block 8, the reversing wheel 91 is arranged at the end of the support column 4 close to the steering seat 6, and a long slot is formed in the plug-in pipe 65 to accommodate the reversing wheel 91. For a more intuitive description, the right end of the plug-in pipe 65 is provided with the tensioning wheel 92, and the left end of the support column 4 is provided with the reversing wheel 91 in the shown orientation. Figure 3

[0057] It is emphasized here that the tensioning wheel 92 is slidably mounted on the plug-in pipe 65 in the left-right direction, and the compensation spring 93 is arranged between the tensioning wheel seat for the tensioning wheel 92 and the right end of the plug-in pipe 65. The compensation spring 93 is a tensile spring. When the distance between the steering seat 6 and the support column 4 is the shortest, the compensation spring 93 is in a natural retracted state or a slightly extended state; when the distance between the steering seat 6 and the support column 4 increases, the compensation spring 93 is stretched, and the tensioning wheel 92 moves to the left to compensate for the change in length caused by the extension of the steering seat 6 to the left.

[0058] The cutting line 71 is wound around the guide wheel one 721 at the steering seat 6, the tensioning wheel 92 on the plug-in pipe 65, the reversing wheel 91 on the support column 4, and then wound around the guide wheel two 722 at the rotating block 8, and then wound around the guide wheel two 722 at the rotating block 8, the reversing wheel 91 in the support column 4, the tensioning wheel 92 in the plug-in pipe 65, and the guide wheel one 721 at the steering seat 6 in the other pre-assembly system, and then connected to form a closed loop.

[0059] The cutting line is a string of beads of diamond wire disclosed in the prior art, and the joint connection method is the same as 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 increases by L0, at this time, the spring 10 is stretched by L0 at the same time, and the total length of the rope ring increases by 2L0 without considering the effect of the length compensation mechanism 9.

[0061] The change in the length of the rope in the length compensation mechanism 9 is: Figure 5 ​When the steering seat 6 moves away from the rotating block 8, the guide wheel one 721 at the steering seat 6 moves downward by L0, at this time, the tension wheel 92 moves downward by L0 / 2, so that the length of the rope between the reversing wheel 91 and the guide wheel one 721 remains unchanged, and thus the length of the cutting line in the length compensation mechanism 9 on one side remains unchanged. Therefore, after the length compensation mechanisms 9 on both sides are introduced, the total length of the rope loop remains unchanged. That is to say, the cutting line 71 can still be kept in a tensioned state and can be smoothly cut.

[0062] Embodiment Four:

[0063] The difference between Embodiment Four and Embodiment One or Embodiment Two or Embodiment Three is that the assembly block 3 partially protrudes from the rotating block 8, and the support table 1 is located outside the two rotating blocks 8, so that the cutting line 71 is not interfered by the support table 1 during the rotation of the support column 4, and the cutting line 71 can cut off the to-be-cut part completely after rotating a full circle with the support column 4. The specific structure is shown in Figure 7

[0064] In this embodiment, the support table 1 can be directly assembled with the pre-assembly system to form an integral part, and when cutting operation is needed, the two integral parts are fixed on the to-be-cut concrete precast block through the mounting block 2, then the two ends of the cutting line 71 are connected and the present application is started, so as to drive the cutting line 71 to move along the predetermined track of the track 51, thereby completing the cutting of the hole with a specific shape.

[0065] According to the above description of the present specification, those skilled in the art can also understand that the terms used such as "upper", "lower", "front", "rear", "left", "right", "width", "horizontal", "top", "bottom", "inner", "outer" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of the present specification, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not mean or imply that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation, therefore the above orientation or positional relationship terms cannot be understood or interpreted as a limitation on the present application.

[0066] In addition, in the description of the present specification, "a plurality of" means at least two, for example, two, three or more, etc., unless otherwise explicitly and specifically limited.​

Claims

1. A cutting device for precast concrete components, characterized in that: The invention comprises two pre-assembly systems and wire saw mechanisms arranged in the two pre-assembly systems, and also comprises a support platform for supporting the pre-assembly systems, wherein each pre-assembly system comprises a mounting block, an assembly block, a support column and a rotating block, wherein the mounting block, the assembly block and the rotating block are sequentially connected in series, the support platform is detachably connected to the assembly block, the mounting block is fixed to the assembly block, the two pre-assembly systems are detachably connected to the precast concrete component to be cut via the mounting block, the rotating block is rotatably mounted on the assembly block, and one end of the support column is fixed to the rotating block and the other end is cantilevered; Each pre-assembly system is equipped with a guide rail assembly, which is fixed on 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 a guide wheel. Two guide wheels are arranged along the extension direction of the pillar in each pre-assembly system. The cutting wire is wound around four sets of guide wheels. The head and tail ends of the cutting wire can form a cutting ring after being fixed, or can pass through the wire hole opened on the prefabricated concrete component to be cut in an unconnected state.

2. A cutting device for precast concrete components according to claim 1, characterized in that: The track is a circular track.

3. The cutting device for precast concrete components according to claim 1, characterized in that: The mounting block is a cylindrical structure including an annular ridge and a cylindrical body. The cylindrical bodies of the mounting blocks in the two pre-assembly systems are plug-connected, and the annular ridge is locked and fixed by long bolts and nuts to adjust the distance between the two. The long bolts are arranged at a position close to the cylindrical body, and the annular ridge is used to clamp and fix the prefabricated concrete components to be cut.

4. A cutting device for precast concrete components according to any one of claims 1 to 3, characterized in that: The overhanging end of the pillar is further provided with a steering seat, which cooperates with the pillar guide movement. A spring is provided between the pillar and the steering seat, and the spring is used to drive the steering seat to move and reset along the pillar guide.

5. The cutting device for precast concrete components according to claim 4, characterized in that: It also includes a length compensation mechanism, which is used to compensate for changes in the length of the cutting line caused by changes in the distance between the steering seat and the center axis of the track.

6. The cutting device for precast concrete components according to claim 5, characterized in that: The pillar is a hollow structure, and the steering seat includes an inserting tube. The shape of the inserting tube matches the shape of the corresponding pillar so as to be inserted therein.

7. The cutting device for precast concrete components according to claim 6, characterized in that: The length compensation mechanism includes a reversing wheel arranged at the left end of the pillar and a tensioning wheel arranged at the right end of the insertion tube. After the cutting line passes around the guide wheel at the steering seat, it 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 can be installed on the insertion tube in a guided and sliding manner along the left and right directions. A compensation spring is arranged between the tensioning wheel seat for installing the tensioning wheel and the right end of the insertion 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 when the cutting line is relaxed to tension the cutting line.

8. The cutting device for precast concrete components according to claim 6, characterized in that: The insertion tube is a stepped shaft section, the small diameter section of which is inserted into the pillar, and the spring is sleeved on the periphery of the large diameter section so as to be clamped between the steering seat and the rotating block.

9. The cutting device for precast concrete components according to claim 4, characterized in that: The steering seat is provided with a limit stop portion which cooperates with the outer contour of the track.

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