A method for preventing cracking during laying of a prefabricated plastic track

Abstract

The application provides a prefabricated plastic track laying anti-cracking method, and relates to the technical field of plastic track laying methods. The prefabricated plastic track laying anti-cracking method comprises the following steps: step 1, cutting and processing a bevel at the end of a first roll near a joint; step 2, laying the first roll and a second roll on a bonding layer, leaving a lap joint at the end of the first roll near the bevel, and placing the lap joint on the second roll; and step 3, abutting the edge of the upper surface of the first roll at the joint with the bevel with the end surface of the second roll near the joint, and extruding the part of the first roll and the second roll at the joint. After the part of the first roll and the second roll at the joint is extruded, the first roll and the second roll at the joint are in interference fit, a certain stress and redundancy exist at the joint, and the phenomenon that the joint is pulled and cracked due to cold shrinkage caused by excessively low ambient temperature is further reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of plastic track laying methods, in particular to a precast plastic track laying anti-cracking method. BACKGROUND

[0002] The plastic track, also known as an all-weather track, is composed of polyurethane prepolymer, mixed polyether, waste tire rubber, EPDM rubber particles or PU particles, pigments, additives and fillers, has the characteristics of good flatness, high compressive strength and stable physical properties, is beneficial to the improvement of the speed of athletes and the play of technology, and is a widely used sports facility. The precast plastic track is a kind of plastic track, which only needs to use a matching special adhesive during construction, directly paste and pave the track coil on a compact base, and can be put into normal use in a short time after the installation of the track, so it has the advantages of convenient installation and short construction period.

[0003] The construction method of the precast plastic track usually includes the following steps: laying a primer, laying a track coil, track coil bonding and coil surface pressing. For example, the construction process of a precast plastic track disclosed in the patent with the publication number CN110835507A includes the following steps:

[0004] S1, foundation reinspection: after cleaning the asphalt base layer of the track, the flatness thereof is detected;

[0005] S2, adhesive coating: the adhesive is coated on the asphalt base layer to form a bonding layer;

[0006] S3, coil laying: the PU coil is laid on the bonding layer, the adjacent PU coil joints are cut neatly, and the coil is laid;

[0007] S4, curing and forming: after the coil laying is completed, the weight is evenly pressed on the coil surface layer.

[0008] However, the precast plastic track installed by the above construction process is prone to cracking at the joints after a long period of use due to the influence of environmental factors such as temperature, for example, the coil is prone to cold shrinkage when the environmental temperature is low, which will cause the joints between adjacent coils to crack, thereby shortening the service life of the precast plastic track, and the cracked part needs to be repaired, causing economic loss. SUMMARY

[0009] The purpose of the present application is to provide a precast plastic track laying anti-cracking method, which solves the problem that the precast plastic track installed by the construction process in the related art is prone to cold shrinkage of the coil when the environmental temperature is low, which will cause the joints between adjacent coils to crack.

[0010] The application provides a precast plastic track laying anti-cracking method which adopts the technical scheme as follows.

[0011] A precast plastic track laying anti-cracking method comprises the following steps.

[0012] Step 1, the adjacent coiled materials to be spliced are respectively set as a first coiled material and a second coiled material, and a bevel is cut and processed at the end of the first coiled material close to the joint;

[0013] Step 2, an adhesive is coated on a base layer to form a bonding layer, the first coiled material and the second coiled material are laid on the bonding layer, a lap joint part is left at the end of the first coiled material close to the bevel, and the lap joint part is placed on the second coiled material;

[0014] Step 3, the edge of the upper surface of the first coiled material at the connection with the bevel is abutted against the end surface of the second coiled material close to the joint, and the part of the first coiled material and the second coiled material at the joint is extruded flat, so that the adhesive is filled in the gap between the bevel of the first coiled material and the end surface of the second coiled material.

[0015] By adopting the above technical scheme, the bevel is cut and processed at the end of the first coiled material close to the joint, so that the gap for accommodating the adhesive is formed between the bevel of the first coiled material and the end surface of the second coiled material after the abutment of the bevel of the first coiled material and the end surface of the second coiled material, the adhesive content at the abutment of the first coiled material and the second coiled material is increased, the bonding force at the joint of the first coiled material and the second coiled material is improved, and the phenomenon that the joint is pulled and cracked due to cold shrinkage caused by excessively low ambient temperature is reduced. Meanwhile, the lap joint part is left at the end of the first coiled material close to the bevel, so that the first coiled material and the second coiled material at the joint are interference-fitted after the part of the first coiled material and the second coiled material at the joint is extruded flat, a certain stress and redundancy exist at the joint, and the phenomenon that the joint is pulled and cracked due to cold shrinkage caused by excessively low ambient temperature is further reduced.

[0016] Optionally, the method further comprises the following steps.

[0017] Step 4, after the part of the first coiled material and the second coiled material at the joint is extruded flat in step 3, it is checked whether the adhesive at the joint is fully filled in the gap, and if not, the part where the adhesive is not fully filled is supplemented with the adhesive.

[0018] By adopting the above technical scheme, after the part of the first coiled material and the second coiled material at the joint is extruded flat, it is checked whether the adhesive at the joint is fully filled in the gap, so that the adhesive is ensured to be fully filled, and the situation that the bonding is not in place is avoided.

[0019] Optionally, the method further comprises the following steps.

[0020] Step 5, after checking whether the adhesive at the joint is filled in the gap and supplementing the adhesive, a pressing block is pressed on the part of the joint between the first and second rolls.

[0021] By adopting the above technical scheme, the pressing block is pressed on the part of the joint between the first and second rolls, so that the flatness of the first and second rolls at the joint can be improved, and the bonding effect at the joint can be ensured.

[0022] Optionally, in the step 1, the inclined surface of the first roll is downwardly inclined, and the included angle between the inclined surface of the first roll and the end surface of the first roll before cutting is 15-20 degrees.

[0023] By adopting the above technical scheme, since the inclined surface of the first roll is downwardly inclined, when the inclined surface of the first roll is butted against the end surface of the second roll, the cross-sectional shape of the gap is a triangle with a narrow upper part and a wide lower part, so that the adhesive can be well stored, and the amount of adhesive overflowing from the gap can be reduced.

[0024] Optionally, in the step 2, after the overlapping part of the first roll is placed on the second roll, the distance between the edge at the junction of the bottom surface and the inclined surface of the first roll and the edge at the junction of the end surface close to the joint and the upper surface of the second roll is 8-10 mm.

[0025] By adopting the above technical scheme, the distance between the edge at the junction of the bottom surface and the inclined surface of the first roll and the edge at the junction of the end surface close to the joint and the upper surface of the second roll is set to 8-10 mm, so that the first and second rolls have a certain extrusion stress after splicing, the cracking of the joint is reduced, and the elastic performance of the rolls is not affected by excessive extrusion stress.

[0026] Optionally, in the step 3, the part of the joint between the first and second rolls is extruded flat by an extruding device.

[0027] The extruding device comprises a moving vehicle body, a flanging mechanism, a roller pressing mechanism and a flattening mechanism, and the flanging mechanism, the roller pressing mechanism and the flattening mechanism are respectively arranged on the moving vehicle body.

[0028] The steps of extruding the part of the joint between the first and second rolls by the extruding device are as follows:

[0029] Step a, the overlapping part is pushed by the flanging mechanism to move towards the first roll, so that the overlapping part of the first roll is raised, and the edge at the junction of the bottom surface and the inclined surface of the first roll is flush with the end surface close to the joint of the second roll;

[0030] Step b, the raised overlapping part of the first roll is rolled by the roller pressing mechanism.

[0031] Step c, flattening the overlapped part of the first roll after rolling by the flattening mechanism.

[0032] By adopting the above technical scheme, the part at the joint of the first roll and the second roll can be extruded flat by the turning mechanism, the rolling mechanism and the flattening mechanism, so that manual extrusion is not needed, and the labor intensity of the workers is effectively reduced.

[0033] Optionally, the turning mechanism comprises a stop block, a first lifting member, a first lifting driving member and a first translation driving member, the first lifting driving member is fixedly arranged on the moving vehicle body and connected with the first lifting member, the first translation driving member is fixedly arranged on the first lifting member and connected with the stop block, and the side surface of the stop block can be in contact with the overlapped part of the first roll.

[0034] In step a, the step of moving the overlapped part towards the direction of the first roll to make the overlapped part of the first roll turn up is as follows: the stop block is driven to descend to the upper surface of the second roll by the first lifting driving member, and then the stop block is driven to move towards the direction of the first roll by the first translation driving member, so that the side surface of the stop block is in contact with the overlapped part of the first roll and the overlapped part is pushed to turn up.

[0035] By adopting the above technical scheme, the side surface of the stop block is in contact with the overlapped part of the first roll by driving the stop block to move towards the direction of the first roll by the first translation driving member, and the overlapped part is pushed to turn up, so that after the overlapped part is flattened, the overlapped part can be in contact with the end surface of the second roll close to the joint.

[0036] Optionally, the rolling mechanism comprises a pressure roller, a pressure roller frame, a second lifting member, a second lifting driving member and a second translation driving member, the second lifting driving member is fixedly arranged on the moving vehicle body and connected with the second lifting member, the second translation driving member is fixedly arranged on the second lifting member and connected with the pressure roller frame, the pressure roller is rotatably arranged on the pressure roller frame, and the pressure roller can be in contact with the upper surface of the first roll.

[0037] In step b, the step of rolling the turned-up overlapped part of the first roll by the rolling mechanism is as follows: the pressure roller is driven to descend to the upper surface of the first roll by the second lifting driving member, and then the pressure roller is driven to move towards the direction of the second roll by the second translation driving member to roll the turned-up overlapped part of the first roll.

[0038] By adopting the above technical scheme, the pressure roller is driven to move towards the direction of the second roll by the second translation driving member, so that the turned-up overlapped part of the first roll is flattened by rolling, and the uniformity of stress distribution at the flattened overlapped part can be improved, and stress concentration can be avoided.

[0039] Optionally, the flattening mechanism comprises a flattening block, an abutting block, a third lifting driving member and a fourth lifting driving member, the third lifting driving member and the fourth lifting driving member are fixedly arranged on the moving vehicle body, the third lifting driving member is connected with the flattening block, the fourth lifting driving member is connected with the abutting block, the lower end surfaces of the flattening block and the abutting block are capable of abutting with the upper surface of the first roll material respectively, and the side surface of the abutting block close to the stop block is capable of slidingly contacting with the side surface of the flattening block away from the stop block.

[0040] In the step c, the flattening step of the overlapped portion of the first roll material after rolling by the flattening mechanism is as follows: the abutting block is driven to descend by the fourth lifting driving member and abuts with the upper surface of the first roll material, then the flattening block is driven to descend by the third lifting driving member, and the overlapped portion of the first roll material is flattened by the flattening block.

[0041] By adopting the above technical scheme, before the overlapped portion of the first roll material is flattened by the flattening block, the abutting block is driven to descend by the fourth lifting driving member and abuts with the upper surface of the first roll material, so as to prevent the overlapped portion of the first roll material from arching and affecting the flatness when the flattening block flattens the overlapped portion of the first roll material.

[0042] Optionally, in the step 5, the code arrangement mechanism is used to press and place the flattening blocks on the portions of the first roll material and the second roll material at the joint.

[0043] The code arrangement mechanism comprises a fifth lifting driving member, a support, a rack, a gear, a limiting block and an elastic member, the fifth lifting driving member is fixedly arranged on the moving vehicle body and connected with the support, the support is provided with a vertical slot, the rack is vertically and telescopically arranged on the support and capable of extending below the bottom surface of the support, the elastic member is arranged on the support and acts on the rack, the limiting block is horizontally and telescopically arranged on the support and capable of extending into the vertical slot, the gear is rotationally arranged on the support, the rack is engaged with the gear, the limiting block is provided with a gear rack, the gear rack is engaged with the gear, and the flattening blocks are provided in plurality, the plurality of flattening blocks are telescopically arranged in the vertical slot layer by layer, the both side portions of the flattening blocks are respectively provided with supporting bosses, the supporting boss of the flattening block at the lowermost layer is placed on the limiting block, the distance between the bottom surface of the flattening block at the lowermost layer and the bottom surface of the support is greater than the thickness of the supporting boss and less than the distance between the bottom surface of the supporting boss and the bottom surface of the flattening block.

[0044] The step of pressing and placing the flattening blocks on the portions of the first roll material and the second roll material at the joint by the code arrangement mechanism is as follows:

[0045] Step I, the support is driven to descend by the fifth lifting driving member until the bottom surface of the support contacts the upper surfaces of the first roll material and the second roll material, and in the process of descending, the limit block is retracted by the rack via the gear drive, the lowermost pressing block falls and is pressed on the part at the joint of the first roll material and the second roll material;

[0046] Step II, the support is driven to ascend by the fifth lifting driving member, the rack is driven to extend by the elastic member, the limit block is driven to extend by the rack via the gear drive, the support boss of the second lowermost pressing block is supported, then the code arrangement mechanism is moved by moving the vehicle body, and step I is repeated.

[0047] By adopting the above technical scheme, the pressing blocks can be pressed on the part at the joint of the first roll material and the second roll material by the code arrangement mechanism, so that the automatic stacking of the pressing blocks is realized, and the labor intensity of the workers is effectively reduced.

[0048] In summary, the present application includes at least one of the following beneficial technical effects:

[0049] 1. By cutting a bevel on the end of the first roll material close to the joint, a gap for accommodating adhesive can be formed between the bevel of the first roll material and the end surface of the second roll material after they are butted, thereby increasing the adhesive content at the butt joint of the first roll material and the second roll material, further improving the bonding strength at the butt joint, and reducing the phenomenon of cold shrinkage caused by excessively low ambient temperature to crack the joint. At the same time, since the lap joint part is left at the end of the first roll material close to the bevel, the first roll material and the second roll material at the joint can be interference fit after the part at the joint of the first roll material and the second roll material is extruded flat, so that there is a certain stress and redundancy at the joint, further reducing the phenomenon of cold shrinkage caused by excessively low ambient temperature to crack the joint.

[0050] 2. The part at the joint of the first roll material and the second roll material can be extruded flat by the flanging mechanism, the rolling mechanism and the flattening mechanism, so that manual extrusion is not required, and the labor intensity of the workers is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 It is a schematic diagram of step 2 of the anti-cracking method for laying the prefabricated plastic track in embodiment 1 of the present application;

[0052] Figure 2 It is a schematic diagram of step 3 of the anti-cracking method for laying the prefabricated plastic track in embodiment 1 of the present application;

[0053] Figure 3 It is a structural schematic diagram of the first perspective view of the extruding device in embodiment 2 of the present application;

[0054] Figure 4Structure diagram of the second perspective view of the flattening device in Embodiment 2 of the present application;

[0055] Figure 5 Structure diagram of the code arranging mechanism in Embodiment 2 of the present application;

[0056] Figure 6 Structure diagram of the code arranging mechanism in Embodiment 2 of the present application; Figure 5 Structure diagram of the code arranging mechanism in Embodiment 2 of the present application; Structure diagram of the code arranging mechanism in Embodiment 2 of the present application;

[0057] Structure diagram of the code arranging mechanism in Embodiment 2 of the present application; Figure 7 Structure diagram of the code arranging mechanism in Embodiment 2 of the present application; Structure diagram of the code arranging mechanism in Embodiment 2 of the present application;

[0058] Structure diagram of the code arranging mechanism in Embodiment 2 of the present application; Figure 8 Structure diagram of the code arranging mechanism in Embodiment 2 of the present application; Structure diagram of the code arranging mechanism in Embodiment 2 of the present application;

[0059] Structure diagram of the code arranging mechanism in Embodiment 2 of the present application. Figure 9 Explanation of reference numerals:

[0060] 10, first roll; 11, inclined surface; 12, lap joint;

[0061] 20, second roll; 30, base layer; 40, gap;

[0062] 50, pressing block; 51, supporting boss;

[0063] 60, flanging mechanism; 61, stop block; 62, first lifting member; 63, first lifting driving member; 64, first translation driving member; 65, first vertical guide rod; 66, first horizontal guide rod;

[0064] 70, rolling mechanism; 71, rolling roller; 72, rolling roller holder; 73, second lifting member; 74, second lifting driving member; 75, second translation driving member; 76, second vertical guide rod; 77, second horizontal guide rod;

[0065] 80, flattening mechanism; 81, flattening block; 82, abutting block; 83, third lifting driving member; 84, fourth lifting driving member; 85, third vertical guide rod; 86, fourth vertical guide rod;

[0066] 90, code arranging mechanism; 91, fifth lifting driving member; 92, support; 921, vertical slot; 922, horizontal slot; 923, spring slot; 924, pin slot; 925, rack slot; 93, rack; 931, pin column; 9311, anti-falling boss; 94, gear; 95, limiting block; 951, tooth row; 952, avoiding slot; 96, elastic member;

[0067] 100, moving vehicle body; 101, moving caster.

[0068] 100, moving vehicle body; 101, moving caster. Detailed Implementation

[0069] The following is in conjunction with the appendix Figure 1 -Appendix Figure 9 This application will be described in further detail below.

[0070] Example 1

[0071] Embodiment 1 of this application discloses a method for preventing cracking when laying prefabricated plastic running tracks.

[0072] A method for preventing cracking during the installation of precast plastic running tracks includes the following steps:

[0073] Step 1: Designate the adjacent rolls of material to be laid and spliced ​​as the first roll 10 and the second roll 20, respectively. Cut a bevel 11 at the end of the first roll 10 near the joint, referring to... Figure 1 The inclined surface 11 of the first roll 10 slopes downward, and the angle α between the inclined surface 11 of the first roll 10 and the end face of the first roll 10 before cutting is 15-20 degrees.

[0074] By cutting a bevel 11 at the end of the first roll 10 near the seam, a gap 40 for accommodating adhesive is formed between the bevel 11 of the first roll 10 and the end face of the second roll 20 after the bevel 11 of the first roll 10 is brought into contact with the end face of the second roll 20. Since the bevel 11 of the first roll 10 is inclined downward, the cross-sectional shape of the gap 40 is a triangle that is narrow at the top and wide at the bottom after the bevel 11 of the first roll 10 is brought into contact with the end face of the second roll 20. This can provide a good adhesive storage effect and reduce the amount of adhesive overflowing from the gap 40.

[0075] Step 2, refer to Figure 1 The adhesive is applied to the base layer 30 to form an adhesive layer. The first roll 10 and the second roll 20 are laid on the adhesive layer. An overlap 12 is left at the end of the first roll 10 near the inclined surface 11, and the overlap 12 is placed on the second roll 20.

[0076] After the overlap 12 of the first roll 10 is placed on the second roll 20, the distance L between the edge at the connection between the bottom surface and the inclined surface 11 of the first roll 10 and the edge at the connection between the end face and the top surface of the second roll 20 near the seam is 8-10 mm.

[0077] When the adhesive is coated on the base layer 30, the adhesive can be evenly distributed on the base layer 30 except the joint by manual scraping, so that the first roll material 10 and the second roll material 20 can be uniformly bonded with the base layer 30; meanwhile, the adhesive on the joint of the base layer 30 is more than that on other positions, so that the adhesive can be fully filled in the gap 40 between the inclined surface 11 of the first roll material 10 and the end surface of the second roll material 20 after the inclined surface 11 of the first roll material 10 and the end surface of the second roll material 20 are butted;

[0078] Step 3, referring to Figure 2 The edge of the upper surface of the first roll material 10 at the connection with the inclined surface 11 is butted against the end surface of the second roll material 20 near the joint, and the part of the first roll material 10 and the second roll material 20 at the joint is extruded flat, so that the adhesive is filled in the gap 40 between the inclined surface 11 of the first roll material 10 and the end surface of the second roll material 20;

[0079] Since the lap joint part 12 is left at the end of the first roll material 10 near the inclined surface 11, after the part of the first roll material 10 and the second roll material 20 at the joint is extruded flat, the first roll material 10 and the second roll material 20 at the joint are in interference fit, so that there is a certain stress and redundancy at the joint, thereby reducing the phenomenon that the joint is cracked due to cold shrinkage caused by too low ambient temperature;

[0080] Step 4, after the part of the first roll material 10 and the second roll material 20 at the joint is extruded flat by step 3, it is checked whether the adhesive at the joint is fully filled in the gap 40, and if not, the part where the adhesive is not fully filled is supplemented with adhesive;

[0081] In this embodiment, whether the adhesive at the joint is fully filled in the gap 40 can be checked by manual visual observation, and when checking, whether the adhesive at the joint overflows is observed, if the adhesive at the joint overflows, it means that the adhesive at the joint is fully filled in the gap 40, if there is no adhesive at the joint, it means that the adhesive at the joint is not fully filled in the gap 40, and there is a lack of adhesive;

[0082] When the joint at the lack of adhesive is supplemented with adhesive, the first roll material 10 at the joint can be manually lifted, and then the adhesive is supplemented into the joint from the lifted part;

[0083] Step 5, since the part at the joint of the first roll 10 and the second roll 20 is prone to warping due to the stress at the joint after being extruded flat, the pressure block 50 is placed on the part at the joint of the first roll 10 and the second roll 20 after the step 4 to check whether the adhesive is filled in the gap 40 and to supplement the adhesive, so as to improve the flatness of the first roll 10 and the second roll 20 at the joint and ensure the bonding effect at the joint; in the embodiment, the pressure block 50 can be a brick, and the brick can be placed on the part at the joint of the first roll 10 and the second roll 20 by artificial stacking.

[0084] The implementation principle of the anti-cracking method for laying the prefabricated plastic track is as follows: the bevel 11 is cut at the end of the first roll 10 close to the joint, so that the gap 40 for accommodating the adhesive is formed between the bevel 11 of the first roll 10 and the end face of the second roll 20 after the abutment of the bevel 11 of the first roll 10 and the end face of the second roll 20, thereby increasing the adhesive content at the joint of the first roll 10 and the second roll 20, and further improving the bonding strength at the joint of the first roll 10 and the second roll 20, and reducing the phenomenon that the joint is pulled apart due to cold shrinkage caused by excessively low ambient temperature. Meanwhile, since the lap joint part 12 is left at the end of the first roll 10 close to the bevel 11, the first roll 10 and the second roll 20 at the joint can be in interference fit after the part at the joint of the first roll 10 and the second roll 20 is extruded flat, so that a certain stress and redundancy exist at the joint, and the phenomenon that the joint is pulled apart due to cold shrinkage caused by excessively low ambient temperature is further reduced.

[0085] Embodiment 2

[0086] The embodiment 2 of the present application discloses an extruding device and a stacking mechanism 90.

[0087] Referring to Figure 3 and Figure 4 , the extruding device comprises a moving vehicle body 100, a flanging mechanism 60, a roller mechanism 70 and a flattening mechanism 80, the moving vehicle body 100 is provided with a moving caster 101 to facilitate the movement of the extruding device, and the flanging mechanism 60, the roller mechanism 70 and the flattening mechanism 80 are respectively arranged on the moving vehicle body 100.

[0088] In an optional embodiment, the specific structures of the flanging mechanism 60, the roller mechanism 70 and the flattening mechanism 80, and the specific connection relationship with the moving vehicle body 100 are as follows:

[0089] The flanging mechanism 60 comprises a stopper 61, a first lifting member 62, a first lifting driver 63 and a first translation driver 64. The first lifting member 62 is slidingly arranged on the moving vehicle body 100 through a first vertical guide rod 65. The first lifting driver 63 is fixedly arranged on the moving vehicle body 100 and connected with the first lifting member 62, and the first lifting driver 63 can drive the first lifting member 62 to lift. The stopper 61 is slidingly arranged on the first lifting member 62 through a first horizontal guide rod 66. The first translation driver 64 is fixedly arranged on the first lifting member 62 and connected with the stopper 61, and the first translation driver 64 can drive the stopper 61 to translate. The side surface of the stopper 61 can contact the lap joint portion 12 of the first coiled material 10. In the embodiment, the first lifting driver 63 can be a first lifting driving cylinder, and the first translation driver 64 can be a first translation driving cylinder.

[0090] The roller pressing mechanism 70 comprises a pressing roller 71, a pressing roller frame 72, a second lifting member 73, a second lifting driver 74 and a second translation driver 75. The second lifting member 73 is slidingly arranged on the moving vehicle body 100 through a second vertical guide rod 76. The second lifting driver 74 is fixedly arranged on the moving vehicle body 100 and connected with the second lifting member 73, and the second lifting driver 74 can drive the second lifting member 73 to lift. The pressing roller frame 72 is slidingly arranged on the second lifting member 73 through a second horizontal guide rod 77. The second translation driver 75 is fixedly arranged on the second lifting member 73 and connected with the pressing roller frame 72, and the second translation driver 75 can drive the pressing roller frame 72 to translate. The pressing roller 71 is rotatably arranged on the pressing roller frame 72, and the pressing roller 71 can contact the upper surface of the first coiled material 10. In the embodiment, the second lifting driver 74 can be a second lifting driving cylinder, and the second translation driver 75 can be a second translation driving cylinder.

[0091] The flattening mechanism 80 comprises a flattening block 81, an abutting block 82, a third lifting driver 83 and a fourth lifting driver 84. The third lifting driver 83 and the fourth lifting driver 84 are fixedly arranged on the moving vehicle body 100. The flattening block 81 is slidingly arranged on the moving vehicle body 100 through a third vertical guide rod 85. The third lifting driver 83 is connected with the flattening block 81, and the third lifting driver 83 can drive the flattening block 81 to lift. The abutting block 82 is slidingly arranged on the moving vehicle body 100 through a fourth vertical guide rod 86. The fourth lifting driver 84 is connected with the abutting block 82, and the fourth lifting driver 84 can drive the abutting block 82 to lift. The lower end surfaces of the flattening block 81 and the abutting block 82 can respectively abut against the upper surface of the first coiled material 10. The side surface of the abutting block 82 close to the stopper 61 can slidingly contact the side surface of the flattening block 81 away from the stopper 61. In the embodiment, the third lifting driver 83 can be a third lifting driving cylinder, and the fourth lifting driver 84 can be a fourth lifting driving cylinder.

[0092] Referring to Figure 5And Figure 6 In an optional embodiment, the specific structure of the code arrangement mechanism 90 is as follows:

[0093] The code arrangement mechanism 90 comprises a fifth lifting driving member 91, a support 92, a rack 93, a gear 94, a limiting block 95 and an elastic member 96. The fifth lifting driving member 91 is fixedly arranged on the moving vehicle body 100 and connected with the support 92. The fifth lifting driving member 91 can drive the support 92 to lift. In this embodiment, the fifth lifting driving member 91 can be a fifth lifting driving cylinder.

[0094] The support 92 is provided with a vertical slot 921. The limiting block 95 is arranged on the support 92 in a telescopic manner along the horizontal direction and can extend into the vertical slot 921. More specifically, the support 92 is provided with a horizontal slot 922 which is in communication with the vertical slot 921. The limiting block 95 is slidingly arranged in the horizontal slot 922.

[0095] The rack 93 is arranged on the support 92 in a telescopic manner along the vertical direction and can extend below the bottom surface of the support 92. More specifically, the support 92 is provided with a rack slot 925 which is in communication with the horizontal slot 922. The rack 93 is slidingly arranged in the rack slot 925. The support 92 is further provided with a spring slot 923 which is in communication with the rack slot 925. The support 92 is further provided with a pin slot 924 which is in communication with the spring slot 923. The rack 93 is provided with a pin column 931 which is slidingly arranged in the spring slot 923 and the pin slot 924. The pin column 931 is provided with a anti-disengagement boss 9311. The lower end surface of the anti-disengagement boss 9311 can abut against the bottom surface of the spring slot 923. The limiting block 95 is provided with an avoiding slot 952 which corresponds to the rack 93.

[0096] The elastic member 96 is arranged on the support 92 and acts on the rack 93. More specifically, the elastic member 96 can be a spring. The spring is sleeved outside the pin column 931. The two ends of the spring abut against the upper end surface of the anti-disengagement boss 9311 and the top surface of the spring slot 923 respectively.

[0097] The gear 94 is rotatably arranged on the support 92. The rack 93 is engaged with the gear 94. The limiting block 95 is provided with a gear rack 951 which is engaged with the gear 94. The pressing block 50 is provided with a plurality of supporting bosses 51. The plurality of pressing blocks 50 are arranged in the vertical slot 921 in layers. The two sides of the pressing block 50 are respectively provided with the supporting bosses 51. The supporting boss 51 of the lowermost pressing block 50 is placed on the limiting block 95. The distance between the bottom surface of the lowermost pressing block 50 and the bottom surface of the support 92 is greater than the thickness of the supporting boss 51 and less than the distance between the bottom surface of the supporting boss 51 and the bottom surface of the pressing block 50.

[0098] The embodiment 2 of the present application based on the flattening device and the code arrangement mechanism 90 further discloses a crack prevention method for laying a prefabricated plastic track. The crack prevention method for laying a prefabricated plastic track of the embodiment 2 of the present application is different from the embodiment 1 in the following contents.

[0099] In step 3, the part of the first web 10 and the second web 20 at the joint is flattened by a flattening device, and the flattening of the part of the first web 10 and the second web 20 at the joint by the flattening device is as follows:

[0100] Step a, refer to Figure 7 The overlapping part 12 is pushed by the flanging mechanism 60 to move towards the first web 10, so that the overlapping part 12 of the first web 10 is raised, and the edge of the lower surface of the first web 10 at the connection with the inclined surface 11 is flush with the end surface of the second web 20 near the joint;

[0101] The overlapping part 12 is pushed by the flanging mechanism 60 to move towards the first web 10, so that the overlapping part 12 of the first web 10 is raised, and the edge of the lower surface of the first web 10 at the connection with the inclined surface 11 is flush with the end surface of the second web 20 near the joint;

[0102] Step b, refer to Figure 8 The raised overlapping part 12 of the first web 10 is rolled by the rolling mechanism 70;

[0103] The raised overlapping part 12 of the first web 10 is rolled by the rolling mechanism 70, and the rolling of the raised overlapping part 12 of the first web 10 by the rolling mechanism 70 is as follows: the pressure roller 71 is driven by the second lifting drive 74 to descend to contact the upper surface of the first web 10, and then the pressure roller 71 is driven by the second translation drive 75 to move towards the second web 20, so that the raised overlapping part 12 of the first web 10 is rolled and flattened, and the overlapping part 12 is flattened when the pressure roller 71 contacts the side surface of the stop block 61, at which time the overlapping part 12 has a dead angle that cannot be rolled by the pressure roller 71, so that the flattening mechanism 80 is needed to flatten the overlapping part 12;

[0104] Step c, refer to Figure 9 The overlapping part 12 of the first web 10 after rolling is flattened by the flattening mechanism 80.

[0105] The flattening step of the overlapped part 12 of the first roll 10 by the flattening mechanism 80 is as follows: the pressure roller 71 is reset by the second translation drive 75, then the abutting block 82 is lowered by the fourth lifting drive 84 and abuts the upper surface of the first roll 10, then the flattening block 81 is lowered by the third lifting drive 83, and the overlapped part 12 of the first roll 10 is flattened by the flattening block 81. During the lowering process, the two side walls of the flattening block 81 slide with the side of the stop block 61 close to the joint and the side of the abutting block 82 close to the joint.

[0106] In step 5, the pressure blocks 50 are placed on the joint part of the first roll 10 and the second roll 20 by the code arrangement mechanism 90. The placing step of the pressure blocks 50 on the joint part of the first roll 10 and the second roll 20 by the code arrangement mechanism 90 is as follows:

[0107] Step I: the support 92 is lowered by the fifth lifting drive 91 until the bottom surface of the support 92 contacts the upper surfaces of the first roll 10 and the second roll 20. During the lowering process, the limiting block 95 is retracted into the horizontal slot 922 by the rack 93 via the gear 94, so that the limiting block 95 loses the supporting limit of the supporting boss 51. Then the lowest pressure block 50 falls and is placed on the joint part of the first roll 10 and the second roll 20 under the action of gravity.

[0108] Step II: the support 92 is raised by the fifth lifting drive 91. During the raising process, the rack 93 is extended downward relative to the support 92 by the elastic member 96, and the limiting block 95 is extended into the vertical slot 921 by the rack 93 via the gear 94. Since the distance between the bottom surface of the lowest pressure block 50 and the bottom surface of the support 92 is greater than the thickness of the supporting boss 51 and less than the distance between the bottom surface of the supporting boss 51 and the bottom surface of the pressure block 50, the height of the limiting block 95 is between the upper surface of the supporting boss 51 of the lowest pressure block 50 and the lower surface of the supporting boss 51 of the second lowest pressure block 50 before the extension of the limiting block 95. Therefore, during the raising process of the support 92 and the extension of the limiting block 95, the limiting block 95 can extend below the supporting boss 51 of the second lowest pressure block 50 to support the supporting boss 51 of the second lowest pressure block 50, so that the pressure blocks 50 other than the lowest one can be lifted. Then the code arrangement mechanism 90 and the remaining pressure blocks 50 are moved by the moving vehicle body 100, and step I is repeated.

[0109] The embodiments of the specific implementation are the preferred embodiments of the present application, and do not limit the protection scope of the present application. The same parts are indicated by the same reference numerals. Therefore, equivalent changes made according to the structure, shape, and principle of the present application should be covered by the protection scope of the present application.

Claims

1. A method for preventing cracking in the laying of a prefabricated plastic track, characterized in that, The method comprises the following steps: Step 1, the adjacent rolls to be spliced are respectively set as a first roll (10) and a second roll (20), and a bevel (11) is cut on the end of the first roll (10) close to the joint; Step 2, an adhesive is coated on a base layer (30) to form a bonding layer, the first roll (10) and the second roll (20) are laid on the bonding layer, a lap joint (12) is left on the end of the first roll (10) close to the bevel (11), and the lap joint (12) is laid on the second roll (20); Step 3, the edge of the upper surface of the first roll (10) at the connection with the bevel (11) is abutted against the end surface of the second roll (20) close to the joint, and the part of the first roll (10) and the second roll (20) at the joint is extruded flat, so that the adhesive is filled in the gap (40) between the bevel (11) of the first roll (10) and the end surface of the second roll (20); Step 4, after the part of the first roll (10) and the second roll (20) at the joint is extruded flat in Step 3, it is checked whether the adhesive at the joint is sufficiently filled in the gap (40), and if not, the part where the adhesive is not sufficiently filled is supplemented with adhesive; Step 5, after the adhesive at the joint is checked whether it is sufficiently filled in the gap (40) and supplemented with adhesive in Step 4, a pressing block (50) is laid on the part of the first roll (10) and the second roll (20) at the joint; In the step 3, the part of the first roll (10) and the second roll (20) at the joint is extruded flat by an extruding device; The extruding device comprises a moving vehicle body (100), a flanging mechanism (60), a rolling mechanism (70) and a flattening mechanism (80), and the flanging mechanism (60), the rolling mechanism (70) and the flattening mechanism (80) are respectively arranged on the moving vehicle body (100); The steps of extruding the part of the first roll (10) and the second roll (20) at the joint by the extruding device are as follows: Step a, the lap joint (12) is moved towards the first roll (10) by the flanging mechanism (60), so that the lap joint (12) of the first roll (10) is raised, and the edge of the lower surface of the first roll (10) at the connection with the bevel (11) is flush with the end surface of the second roll (20) close to the joint; Step b, the raised lap joint (12) of the first roll (10) is rolled by the rolling mechanism (70); Step c, the rolled lap joint (12) of the first roll (10) is flattened by the flattening mechanism (80).

2. The method of claim 1, wherein the method further comprises: In the step 1, the bevel (11) of the first roll (10) is downwardly inclined, and the included angle between the bevel (11) of the first roll (10) and the end surface of the first roll (10) before cutting is 15-20 degrees.

3. The method of claim 1, wherein the method further comprises: In the step 2, after the lap joint (12) of the first roll (10) is laid on the second roll (20), the distance between the edge of the bottom surface of the first roll (10) at the connection with the bevel (11) and the edge of the second roll (20) at the connection between the end surface close to the joint and the upper surface is 8-10 mm.

4. The method of claim 1, wherein the method further comprises: The flanging mechanism (60) comprises a stopper (61), a first lifting member (62), a first lifting driving member (63) and a first translation driving member (64), the first lifting driving member (63) is fixed on the mobile vehicle body (100) and connected with the first lifting member (62), the first translation driving member (64) is fixed on the first lifting member (62) and connected with the stopper (61), and the side surface of the stopper (61) can contact the lap joint part (12) of the first coiled material (10); In the step a, the lap joint part (12) is pushed by the flanging mechanism (60) to move towards the direction of the first coiled material (10), so that the lap joint part (12) of the first coiled material (10) is lifted up, and the step is as follows: the stopper (61) is driven by the first lifting driving member (63) to descend to contact the upper surface of the second coiled material (20), and then the stopper (61) is driven by the first translation driving member (64) to move towards the direction of the first coiled material (10), so that the side surface of the stopper (61) contacts the lap joint part (12) of the first coiled material (10) and pushes the lap joint part (12) to lift up.

5. The method for preventing cracking during the laying of precast plastic running tracks according to claim 1, characterized in that, The rolling mechanism (70) comprises a pressure roller (71), a pressure roller frame (72), a second lifting member (73), a second lifting driving member (74) and a second translation driving member (75), the second lifting driving member (74) is fixed on the mobile vehicle body (100) and connected with the second lifting member (73), the second translation driving member (75) is fixed on the second lifting member (73) and connected with the pressure roller frame (72), the pressure roller (71) is rotatably arranged on the pressure roller frame (72), and the pressure roller (71) can contact the upper surface of the first coiled material (10); In the step b, the lap joint part (12) of the first coiled material (10) which is lifted up is rolled by the rolling mechanism (70), and the step is as follows: the pressure roller (71) is driven by the second lifting driving member (74) to descend to contact the upper surface of the first coiled material (10), and then the pressure roller (71) is driven by the second translation driving member (75) to move towards the direction of the second coiled material (20), so that the lap joint part (12) of the first coiled material (10) which is lifted up is rolled.

6. The method of claim 1, wherein the method further comprises the step of: The flattening mechanism (80) comprises a flattening block (81), an abutting block (82), a third lifting driving member (83) and a fourth lifting driving member (84), the third lifting driving member (83) and the fourth lifting driving member (84) are fixed on the mobile vehicle body (100), the third lifting driving member (83) is connected with the flattening block (81), the fourth lifting driving member (84) is connected with the abutting block (82), the lower end surfaces of the flattening block (81) and the abutting block (82) can respectively abut against the upper surface of the first coiled material (10), and the side surface of the abutting block (82) close to the stopper (61) can slide contact the side surface of the flattening block (81) away from the stopper (61); ​ In the step c, the step of flattening the overlapped part (12) of the first roll material (10) after rolling by the flattening mechanism (80) is as follows: the abutting block (82) is driven to descend by the fourth lifting drive (84) and abuts against the upper surface of the first roll material (10), then the flattening block (81) is driven to descend by the third lifting drive (83), and the overlapped part (12) of the first roll material (10) is flattened by the flattening block (81).

7. The method of claim 1, wherein the method further comprises the step of: In the step 5, the step of pressing and placing the pressing blocks (50) on the part of the first roll material (10) and the second roll material (20) at the joint by the code arrangement mechanism (90) is as follows: ​ The code arrangement mechanism (90) comprises a fifth lifting drive (91), a support (92), a rack (93), a gear (94), a limiting block (95) and an elastic element (96), the fifth lifting drive (91) is fixed on the moving vehicle body (100) and connected with the support (92), the support (92) is provided with a vertical slot (921), the rack (93) is vertically and telescopically arranged on the support (92) and can be extended below the bottom surface of the support (92), the elastic element (96) is arranged on the support (92) and acts on the rack (93), the limiting block (95) is horizontally and telescopically arranged on the support (92) and can be extended into the vertical slot (921), the gear (94) is rotatably arranged on the support (92), the rack (93) is engaged with the gear (94), the limiting block (95) is provided with a gear row (951), the gear row (951) is engaged with the gear (94), a plurality of the pressing blocks (50) are arranged, the plurality of the pressing blocks (50) are slidably arranged in the vertical slot (921) layer by layer, the both sides of the pressing block (50) are respectively provided with a supporting boss (51), the supporting boss (51) of the lowermost pressing block (50) is placed on the limiting block (95), the distance between the bottom surface of the lowermost pressing block (50) and the bottom surface of the support (92) is greater than the thickness of the supporting boss (51) and less than the distance between the bottom surface of the supporting boss (51) and the bottom surface of the pressing block (50). The step of pressing and placing the pressing blocks (50) on the part of the first roll material (10) and the second roll material (20) at the joint by the code arrangement mechanism (90) is as follows: Step I, the support (92) is driven to descend by the fifth lifting drive (91) until the bottom surface of the support (92) contacts the upper surfaces of the first roll material (10) and the second roll material (20), in the descending process, the lowermost pressing block (50) falls and is pressed on the part of the first roll material (10) and the second roll material (20) at the joint by the contraction of the limiting block (95) driven by the rack (93) through the gear (94). Step II, drive the support (92) up by the fifth lifting drive (91), drive the rack (93) to extend by the elastic member (96), drive the limit block (95) to extend by the rack (93) through the gear (94), support the support boss (51) of the second lowest layer pressing block (50), then move the code row mechanism (90) by moving the vehicle body (100), and repeat step I.

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