Supporting device for pipeline construction

Abstract

The invention discloses a supporting device for pipeline construction. The supporting device is mainly composed of a pair of breast boards, a connecting rod, a bolt, a magnet and a safety cover plate. The soil retaining plate tightly abuts against the wall of the pipeline slotting, an inserting groove in the inner side is matched with an elastic pin to be preliminarily fixed to a clamping groove in the end of the connecting rod, then the soil retaining plate is further fastened through a second bolt hole corresponding to a first bolt hole and a bolt, spot welding is conducted on the contact portion through a shape memory alloy welding material, and the connecting rod is telescopic. The magnets are arranged in the containing cavities of the connecting rods and connected with the ends of the bolts in a magnetic attraction mode, the connecting stability is enhanced, the top of the breast board is covered with the safety cover plate, and the construction safety is guaranteed. The supporting device provided by the invention is ingenious in structural design, a sloping procedure is not needed, the stability is greatly improved by utilizing multiple connection combinations of bolts, spot welding and magnetic attraction, and meanwhile, the shape memory alloy welding material is combined with the unique structural design, so that rapid mounting and dismounting are realized, and the construction efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline construction, and more specifically, to a supporting device for pipeline construction. Background Art

[0002] In the traditional trenching construction of deep and large pipelines, slope reduction is a common method to ensure construction safety and effectively prevent soil or rock collapse, that is, to make the excavated pit wall form a specific inclination angle. Although this method can enhance the stability of the soil wall, it brings many disadvantages. On the one hand, slope reduction occupies a large amount of construction space, and the amount of earthwork increases significantly, resulting in rising construction costs and extended construction periods; on the other hand, when pipeline construction is carried out in narrow or confined spaces, slope reduction operations are often difficult to implement, which greatly limits the feasibility and flexibility of construction.

[0003] At present, if you want to achieve pipeline grooving without slope, a support device is indispensable. However, most of the existing pipeline support devices are fixed, need to be customized according to the size of the groove, and have poor applicability. Even if an assembled support device is proposed, there are obvious defects in the connection method between the beam and the retaining plate. Bolt connection is not stable enough; welding connection is stable but inconvenient to disassemble and transport. These problems seriously affect construction efficiency and cost control. Therefore, the development of a new type of assembled support device that can not only reduce or eliminate the need for slope reduction, but also solve the drawbacks of the existing support device connection method and improve construction efficiency and safety has become a difficult problem that needs to be overcome in the industry. Summary of the invention

[0004] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0005] Another object of the present invention is to provide a support device for pipeline construction, which can at least solve the above-mentioned technical problems.

[0006] In order to achieve these purposes and other advantages according to the present invention, a support device for pipeline construction is provided, which includes: A pair of retaining plates are respectively abutted against the pipeline slot wall; a plug-in slot is provided on the inner side of each retaining plate, and elastic pins are provided on both sides; a first bolt hole is provided on the retaining plate, which is connected to the plug-in slot and is coaxially arranged; A connecting rod is arranged between a pair of retaining plates, and is a telescopic rod body; the two ends of the connecting rod are respectively inserted into two plug-in slots on the pair of retaining plates, and the end of the connecting rod is provided with a slot adapted to the elastic pin; the end of the connecting rod is provided with a second bolt hole corresponding to the first bolt hole; an accommodating cavity is provided in the connecting rod, and a through hole communicating with the second bolt hole is provided on the cavity; A bolt, which passes through the first bolt hole, the second bolt hole and the through hole in sequence in the transverse direction and extends into the accommodating cavity; A magnet is located in the accommodating cavity and can be magnetically connected to the end of the bolt; A safety cover plate, which is arranged on the top of a pair of retaining plates; Wherein, a plurality of welding points are arranged at intervals at the contact position between the end of the connecting rod and the retaining plate, and each welding point is welded with shape memory alloy welding material.

[0007] Preferably, in the support device for pipeline construction, a plurality of guide holes are provided at the bottom of each plug-in slot; and a plurality of guide columns corresponding one-to-one to the plurality of guide holes are provided at the end of the connecting rod.

[0008] Preferably, in the support device for pipeline construction, the top of each retaining plate is provided with a mounting groove for placing the side of the safety cover plate, and the inner wall of the mounting groove is provided with an anti-skid texture or an anti-skid coating.

[0009] Preferably, in the support device for pipeline construction, a movable rod is elastically slidably provided in each retaining plate in the vertical direction, which is an L-shaped structure, the horizontal free end of the movable rod extends into the installation groove and is located below the safety cover plate, and the vertical free end extends vertically downward into the elastic pin located at the upper part and is slidably connected with the elastic pin in the vertical direction; An annular limiting groove is provided on the bolt; a limiting hole connected to the second bolt hole is provided at the bottom of the slot, and a limiting rod is elastically slidably provided in the limiting hole along the vertical direction, and the limiting rod is correspondingly arranged along the vertical direction with the movable rod; When the safety cover is placed on the two retaining plates, the vertical portion of the movable rod moves downward through the elastic pin and pushes the limiting rod downward so that the bottom of the limiting rod extends into the limiting groove.

[0010] Preferably, in the support device for pipeline construction, an annular sealing bag is provided in the accommodating cavity, which is located on the side of the magnet close to the bolt, and the sealing bag covers each welding point along the lateral projection; The interior of the sealed bag is filled with a supersaturated sodium acetate solution, and a groove is provided on the inner wall of one side of the sealed bag, and a metal sheet that reacts with the supersaturated sodium acetate solution is movably arranged inside the groove; The free end of the bolt is provided with a circular iron sheet through the bearing member, and the free end of the bolt passes through the circular hole in the middle of the sealing bag, and the iron sheet is magnetically attracted to the magnet; A truncated cone-shaped protrusion is provided in the middle of the magnet, and the end with a smaller diameter is arranged close to the bolt. The upper part of the magnet is connected to a U-shaped push rod through a vertical rod, and the two side edges of the push rod are arranged correspondingly to the metal sheet in the horizontal direction; the size of the through hole on the accommodating cavity is larger than the size of the bottom surface of the protrusion with a smaller diameter, and smaller than the size of the bottom surface of the protrusion with a larger diameter.

[0011] Preferably, in the support device for pipeline construction, the side wall of the accommodating cavity adjacent to the welding point is made of heat-conducting material.

[0012] Preferably, in the support device for pipeline construction, a lifting lug is provided on the top of each retaining plate.

[0013] Preferably, in the support device for pipeline construction, a sealing plug made of silicone material is provided on the outer side of the first bolt hole.

[0014] Preferably, in the support device for pipeline construction, an openable / closable cover is provided on the top of the accommodating cavity.

[0015] Preferably, the support device for pipeline construction and the method for using the support device for pipeline construction include the following steps: Step 1: insert the two ends of the connecting rod into the two plug-in slots on the inner side of a pair of retaining plates respectively. After the insertion is in place, the elastic pin is accommodated in the slot and the guide column is located in the guide slot; shape memory alloy welding material is used at the contact part between the connecting rod and the inner side of the retaining plate, and multiple welding points are formed by spot welding at intervals; Step 2, open the cover on the top of the accommodating chamber, put the sealing bag filled with supersaturated sodium acetate solution into the accommodating chamber, and the circular hole in the middle of the sealing bag corresponds to the through hole on the accommodating chamber; pass the bolt through the first bolt hole, the second bolt hole and the through hole in the accommodating chamber at one time in the horizontal direction, and extend it into the accommodating chamber, and pass through the circular hole in the middle of the sealing bag, and then seal the outside of the first bolt hole with a sealing plug; Step 3: Place the magnet into the accommodating cavity so that the protrusion corresponds to and is adjacent to the free end of the bolt in the horizontal direction, and close the cover; Step 4: Connect the lifting lug to the hook of the lifting equipment, and use the lifting equipment to lift the support device into the groove of the pipeline slot, so that the two retaining plates are close to the inner wall of the groove, and release the hook of the lifting equipment; adjust the length of the connecting rod, push the two retaining plates outward so that the two retaining plates are close to the inner wall of the groove; cover the safety cover on the top of the two retaining plates; Step 5: Insert the pipe to be laid from below the connecting rod and lay it in the groove longitudinally; Step 6. After the pipeline is laid, remove the safety cover from the top of the two retaining plates, adjust the length of the connecting rod, shrink the two retaining plates inward so that the two retaining plates are not in contact with the inner wall of the groove, and use the lifting equipment to take the supporting device out of the groove; open the sealing plug and take out the bolts. During the removal of the bolts, they move horizontally, driving the magnet to move horizontally, and driving the push rod to move toward the corresponding metal sheet and generate a driving force on both sides of the metal sheet, causing the metal sheet to twist and deform. The metal sheet reacts with the supersaturated sodium acetate solution, and the supersaturated sodium acetate in the sealing bag crystallizes. Heat is released during the crystallization process, which heats the welding point. The heated welding point cracks and breaks, and the two ends of the connecting rod are taken out from the plug-in slot of the retaining plate to complete the disassembly of the supporting device.

[0016] The present invention has at least the following beneficial effects: 1. The present invention does not require slope reduction, thus avoiding the occupation of a large amount of construction space due to slope reduction, effectively reducing the amount of earth excavation, reducing construction costs, shortening the construction period, and improving construction efficiency. Furthermore, the connecting rod of the support device provided by the present invention is a telescopic rod body, which can be flexibly adjusted according to different slot sizes, and does not need to be specially customized for specific slot sizes, which greatly improves the applicability of the device and can meet the needs of various different construction scenarios. The connecting rod and the retaining plate of the present invention are initially positioned by elastic pins and card slots, and then bolts are passed through the first bolt hole, the second bolt hole and the through hole for fastening connection. At the same time, shape memory alloy welding materials are used for spot welding at the contact part between the end of the connecting rod and the retaining plate to form multiple welding points. This connection method not only ensures the stability of the connection, but also avoids the problems of insufficient stability of traditional simple bolt connection and inconvenient disassembly and transportation of simple welding connection. The present invention can utilize the unique design of supersaturated sodium acetate solution crystallization heat to break the welding point. After the pipeline is laid, the connecting rod can be easily taken out from the plug-in slot of the retaining plate, so as to realize convenient disassembly of the device, convenient transportation and reuse, reduce construction costs, and improve construction efficiency.

[0017] 2. The safety cover is installed on the top of a pair of retaining plates, which can effectively prevent construction personnel or objects from falling into the groove and ensure construction safety; the anti-slip texture or anti-slip coating of the mounting groove on the top of the retaining plate, as well as the linkage limit structure of the movable rod, limit rod and safety cover, further enhance the stability and safety of the device during use; 3. The guide hole at the bottom of the socket corresponds to the guide column at the end of the connecting rod, which plays a role of precise guidance during the installation process, ensuring that the connecting rod can be accurately inserted into the socket, thereby improving the accuracy and efficiency of the installation.

[0018] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the support device for pipeline construction of the present invention in one of the technical solutions; Figure 2 It is a structural schematic diagram of the support device for pipeline construction of the present invention in another technical solution; Figure 3 It is a structural schematic diagram of the support device for pipeline construction of the present invention in another technical solution; Figure 4 for Figure 3 A partial enlarged view of middle A.

[0020] Explanation of the reference numerals: 1-retaining plate; 11-installation slot; 12-lifting ear; 13-plug-in slot; 131-guide hole; 14-elastic pin; 15-first bolt hole; 16-welding point; 2-connecting rod; 21-slot; 22-second bolt hole; 23-accommodating chamber; 24-guide column; 3-safety cover; 4-bolt; 41-iron sheet; 42-limiting slot; 5-magnet; 61-movable rod; 62-limiting rod; 71-sealing bag; 72-metal sheet; 73-push rod. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0022] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0023] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified.

[0024] In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] like Figures 1 to 4 As shown, the present invention provides a support device for pipeline construction, which includes: A pair of retaining plates 1 are respectively abutted against the pipeline slot wall; a plug-in slot 13 is provided on the inner side of each retaining plate 1, and elastic pins 14 are provided on both sides thereof; a first bolt hole 15 is provided on the retaining plate 1, which is connected to the plug-in slot 13 and is coaxially arranged; A connecting rod 2 is provided between a pair of retaining plates 1, and is a telescopic rod body; the two ends of the connecting rod 2 are respectively inserted into two insertion slots 13 on a pair of retaining plates 1, and a clamping slot 21 adapted to the elastic pin 14 is provided at the end of the connecting rod 2; a second bolt hole 22 corresponding to the first bolt hole 15 is provided at the end of the connecting rod 2; and an accommodating cavity 23 is provided in the connecting rod 2, and a through hole communicating with the second bolt hole 22 is provided on the cavity; The bolt 4 passes through the first bolt hole 15, the second bolt hole 22 and the through hole in sequence in the transverse direction and extends into the accommodating cavity 23; A magnet 5, which is located in the accommodating cavity 23 and can be magnetically connected to the end of the bolt 4; A safety cover plate 3, which is arranged on the top of a pair of retaining plates 1; Among them, a plurality of welding points 16 are arranged at intervals at the contacting parts between the end of the connecting rod 2 and the retaining plate 1, and each welding point 16 is welded with a shape memory alloy welding material. The shape memory alloy welding material is preferably a nickel-titanium shape memory alloy: alloy composition: Ni 50.8% - Ti 49.2% (atomic percentage); phase change temperature: Af = 50°C ~ 80°C (suitable for most construction environments); the spot welding method is preferably laser welding, the welding temperature is controlled at 500°C ~ 700°C, and the welding points are distributed, with one welding point set every 8cm.

[0026] In the above technical scheme, the supporting device of the present invention includes a pair of retaining plates 1, which are preferably made of high-strength, wear-resistant Q345B steel, have good compression and deformation resistance, can withstand large soil side pressure in practical applications, and ensure construction safety; a pair of retaining plates 1 are tightly abutted against the pipeline slot walls, respectively, and can effectively prevent the collapse of the slot wall soil. Due to their good structural strength, there is no need to perform a slope reduction process like the traditional construction method, saving a lot of construction space and time costs. A plug-in slot 13 is provided on the inner side of each retaining plate 1, and elastic pins 14 are provided on both sides of the plug-in slot 13. The elastic pin 14 preferably adopts a spring and a bayonet pin combination structure. When subjected to an external force, the bayonet pin contracts, and after the external force is released, the elastic force of the spring pushes the bayonet pin out and resets it; The connecting rod 2 is a telescopic rod body arranged between a pair of retaining plates 1. It is composed of multiple sections of Q235A metal tubes of different diameters, and a ball screw type locking mechanism is used inside. By rotating the external adjustment handle, the length can be freely adjusted to adapt to pipeline slots of different widths. The two ends of the connecting rod 2 are respectively inserted into the two plug-in slots 13 on a pair of retaining plates 1. After insertion, the card slot 21 provided at the end of the connecting rod 2 and adapted to the elastic pin 14 will be tightly matched with the elastic pin 14, preliminarily fixing the position of the connecting rod 2 to prevent it from being displaced during the installation process. The end of the connecting rod 2 is also provided with a second bolt hole 22 corresponding to the first bolt hole 15. At the same time, a receiving chamber 23 is provided in the connecting rod 2. The receiving chamber 23 runs through the interior of the connecting rod 2. A through hole connected to the second bolt hole 22 is provided on one side of the receiving chamber (for the bolt to pass through), and the receiving chamber provides space for the installation of the magnet 5. Preferably, a pair of connecting rods can be arranged in the longitudinal direction, and two plug-in slots are provided on each corresponding retaining plate; The bolt 4 is preferably made of 40Cr high-strength alloy steel with excellent tensile and shear resistance. The bolt passes through the first bolt hole 15, the second bolt hole 22 and the through hole in the transverse direction and extends into the accommodating cavity 23. By tightening the bolt 4, the connection strength between the retaining plate 1 and the connecting rod 2 can be further enhanced. This bolt connection method is simple to operate and easy for construction personnel to master. It can be installed and disassembled using only ordinary wrench tools. The magnet 5 is located in the accommodating cavity 23 and can be magnetically connected to the end of the bolt 4. The magnet 5 preferably adopts a high-performance neodymium iron boron magnet, which has a high magnetic energy product and can generate a strong magnetic force to ensure close adsorption with the end of the bolt 4, further consolidating the stability of the connection. The design of the bolt, spot welding and magnetic multiple connection combination of the support device of the present invention greatly improves the stability of the support device, and can reliably play a supporting role even in complex construction environments, such as high groundwater levels and soft soil. The safety cover plate 3 is made of a solid fireproof and waterproof glass fiber reinforced plastic composite material, and is placed on the top of a pair of retaining plates 1. The safety cover plate 3 can not only effectively prevent construction personnel or debris from accidentally falling into the trough, thereby ensuring the safety of personnel at the construction site, but also can protect the support device from erosion by the external environment, such as rainwater, corrosive gases, etc., to a certain extent, thereby extending the service life of the support device. Among them, multiple welding points 16 are arranged at intervals at the contact part between the end of the connecting rod 2 and the retaining plate 1, and each welding point 16 is welded with nickel-titanium shape memory alloy welding material. Nickel-titanium shape memory alloy has a unique shape memory effect and superelasticity, and can return to its original shape at a specific temperature. Utilizing this characteristic, when the welding point 16 is heated, the shape memory alloy will generate a contraction force, further enhancing the connection strength of the welding point 16. Moreover, this design allows the support device to be installed by simply inserting the connecting rod 2 into the plug-in slot 13 of the retaining plate 1 and using a small heating device to heat the welding point 16, so that welding and fixing can be completed, and rapid installation can be achieved; when disassembling, the shape memory alloy of the welding point 16 is restored to its initial state through a specific heating method, and the connecting rod 2 and the retaining plate 1 can be easily separated to achieve rapid disassembly. The entire support device has a simple structure, and the connection and coordination between the various components are clear at a glance. It is very convenient for both installation and maintenance, which greatly improves the construction efficiency. The method of using the support device for pipeline construction of the present invention is as follows: First, according to the width of the slot, the length of the connecting rod 2 is preliminarily adjusted so that the spacing between the two retaining plates 1 after being installed is slightly smaller than the slot width, and then the two ends of the connecting rod 2 are inserted into the plug-in slot 13 of the retaining plate 1, and the elastic pin 14 is inserted into the slot 21 to preliminarily fix the connecting rod 2. Next, the welding point 16 is heated by a heating device to solidify the shape memory alloy welding material, and the welding and fixing of the connecting rod 2 and the retaining plate 1 are completed. Then, the free end of the bolt 4 is passed through the first bolt hole 15, the second bolt hole 22 and the through hole in sequence, and extended into the accommodating cavity 23, and then the magnet 5 is placed in the accommodating cavity 23 and connected to the end of the bolt 4 by magnetic attraction. After that, the installed support device is hoisted to the slot position by a crane. After hoisting in place, the length of the connecting rod is further adjusted to push a pair of retaining plates outward, so that the retaining plate 1 is pressed against the groove wall to ensure stable support. Finally, a safety cover 3 is covered on the top of the retaining plate 1. After the pipeline is laid, the construction workers open the safety cover 3, adjust the length of the connecting rod, retract a pair of retaining plates inward so that the retaining plates do not abut against the groove wall, use a crane to lift the supporting device as a whole and take it out of the groove, unscrew the bolt 4, and then heat the welding point 16 to restore the shape memory alloy to its initial state, break the welding point, pull the end of the connecting rod 2 out of the plug-in groove, and easily take the supporting device out of the groove. The entire construction process is efficient and safe, and the pipeline laying task is successfully completed.

[0027] In another technical solution, the support device for pipeline construction is provided with a plurality of guide holes 131 at the bottom of each plug-in slot 13; and a plurality of guide columns 24 corresponding to the plurality of guide holes 131 are provided at the end of the connecting rod 2. A plurality of guide holes 131 are evenly distributed at the bottom of each plug-in slot 13. A plurality of guide columns 24 corresponding to the plurality of guide holes 131 are provided at the end of the connecting rod 2. The guide columns 24 are made of solid No. 45 steel, and the length of the guide columns 24 is precisely designed to be slightly longer than the depth of the connecting rod 2 inserted into the plug-in slot 13, so that when docking, the guide columns 24 can first contact the guide holes 131 and play a guiding role. The outer diameter of the guide column 24 and the inner diameter of the guide hole 131 are matched with a clearance, and the size of the clearance is determined through repeated tests, which can ensure that the guide column 24 can be smoothly inserted into the guide hole 131, and can ensure that there will be no obvious shaking after insertion, providing a stable foundation for the subsequent matching of the elastic pin 14 and the slot 21 and welding fixation.

[0028] During the actual installation process, when the connecting rod 2 needs to be docked with the retaining plate 1, the construction personnel only need to align the end of the connecting rod 2 with the insertion groove 13. Due to the cooperation between the guide column 24 and the guide hole 131, the guide column 24 can be quickly inserted into the guide hole 131, which greatly shortens the docking time and realizes the rapid preliminary docking of the connecting rod 2 and the retaining plate 1. Once the guide column 24 is inserted into the guide hole 131, it can play a preliminary positioning role for the connecting rod 2. At this time, the elastic pin 14 can be accurately aligned with the card slot 21 and inserted into it, completing the preliminary fixation, providing convenient conditions for the subsequent further connection and installation processes, and significantly improving the installation efficiency of the support device.

[0029] In another technical solution, in the support device for pipeline construction, the top of each retaining plate 1 is provided with a mounting groove 11 for placing the side of the safety cover plate 3, and the inner wall of the mounting groove 11 is provided with an anti-skid texture or an anti-skid coating. The mounting groove 11 provides an installation position for the safety cover plate 3, and the inner wall of the mounting groove is provided with an anti-skid texture or an anti-skid coating to improve the stability of the connection between the safety cover plate and the retaining plate.

[0030] In another technical solution, in the support device for pipeline construction, a movable rod 61 is elastically slidably provided in each retaining plate 1 in the vertical direction, which is an L-shaped structure, and the horizontal free end of the movable rod 61 extends into the mounting groove 11 and is located below the safety cover 3, and the vertical free end extends vertically downward into the elastic pin 14 located at the upper part and is slidably connected with the elastic pin 14 in the vertical direction; The bolt 4 is provided with an annular limiting groove 42; the bottom of the slot 21 is provided with a limiting hole connected with the second bolt hole 22, and a limiting rod 62 is elastically slidably provided in the limiting hole along the vertical direction, which is correspondingly arranged with the movable rod 61 along the vertical direction; When the safety cover 3 is placed on the two earth retaining plates 1 , the vertical portion of the movable rod 61 moves downward through the elastic pin 14 , and pushes the limiting rod 62 downward so that the bottom of the limiting rod 62 extends into the limiting groove 42 .

[0031] Each retaining plate 1 is provided with a movable rod 61 elastically sliding in the vertical direction. The movable rod 61 is made of high-strength aluminum alloy. The movable rod 61 is designed as an L-shaped structure. The free end of the horizontal part accurately extends into the installation groove 11 and is just located below the safety cover 3. The free end of the vertical part vertically extends downward to the elastic pin 14 located at the upper part and is slidably connected with the elastic pin 14 in the vertical direction. An annular limit groove 42 is machined on the bolt 4, and the dimensional accuracy of the annular limit groove 42 is controlled at ±0.01mm to ensure the matching accuracy with the limit rod 62. A limiting hole connected to the second bolt hole 22 is provided at the bottom of the slot 21. A limiting rod 62 is elastically slidably provided in the limiting hole along the vertical direction. The limiting rod 62 is arranged correspondingly to the movable rod 61 along the vertical direction. A micro spring is installed at the contact position between the top of the limiting rod 62 and the vertical part of the movable rod 61. The spring provides a continuous upward elastic force to ensure that in the non-locked state (when the safety cover is not in place), the limiting rod 62 is located in the connecting rod and is at a higher position, and its bottom does not interfere with the limiting hole; when the safety cover 3 is placed on the two retaining plates 1, the gravity of the safety cover 3 itself will produce downward pressure on the horizontal part of the movable rod 61. Since the horizontal part and the vertical part of the movable rod 61 are an integrally formed structure, this pressure will be transmitted to the vertical part, causing it to move downward. During the downward movement of the vertical part of the movable rod 61, it will pass through the elastic pin 14 and push the limiting rod 62 downward by virtue of its own structural characteristics. When the bottom of the limiting rod 62 extends into the limiting slot 42, the bolt 4 is locked. At this time, the bolt 4 cannot be easily rotated or moved axially, thereby realizing the self-locking function of the safety cover 3 on the bolt 4, further enhancing the overall stability and safety of the supporting device. When disassembly is required, the construction personnel only need to lift the safety cover plate 3 upwards to release the pressure on the horizontal part of the movable rod 61. Under the action of the micro spring, the limit rod 62 will quickly rebound upwards and disengage from the limit groove 42, and the vertical part of the movable rod 61 will also move upwards and reset. In this way, the bolt 4 will be restored to an operable state, and the construction personnel can easily turn the bolt 4 to disassemble the support device. The whole process is easy to operate and does not require the use of additional complex tools, which greatly improves the construction efficiency and reflects the humanization and convenience of the design.

[0032] In another technical solution, the supporting device for pipeline construction has an annular sealing bag 71 in the accommodating cavity 23, which is located on the side of the magnet 5 close to the bolt 4, and the sealing bag 71 covers each welding point 16 along the lateral projection; The interior of the sealing bag 71 is filled with a supersaturated sodium acetate solution. A groove is provided on the inner wall of one side of the sealing bag 71, and a metal sheet 72 that reacts with the supersaturated sodium acetate solution is movably provided inside the sealing bag 71; in order to better fix the sealing bag 71, a layer of ordinary pressure-sensitive adhesive is covered on the side wall of the sealing bag 71, which can fit tightly with the inner wall of the accommodating chamber 23, and a piece of plastic paper is covered on the surface of the pressure-sensitive adhesive. When the sealing bag 71 does not need to be fixed, the plastic paper plays an isolating and protective role to prevent the pressure-sensitive adhesive from sticking in advance. When the sealing bag 71 needs to be fixed in the accommodating chamber 23, the construction personnel only need to tear off the plastic paper to expose the pressure-sensitive adhesive, and then accurately place the sealing bag 71 at a predetermined position in the accommodating chamber 23, press the sealing bag 71 to make it in close contact with the inner wall of the accommodating chamber 23, and firmly stick the sealing bag 71 on the inner wall of the accommodating chamber 23, so as to effectively prevent the displacement of the sealing bag during the operation of the device; the supersaturated sodium acetate solution preferably has a sodium acetate solution with a concentration of 35% to 40%; crystallization temperature; 50°C ~60°C; the metal sheet is preferably stainless steel, with a thickness of 0.1 mm ~ 0.2 mm; The free end of the bolt 4 is provided with a circular iron sheet 41 for rotation through a bearing member, and the free end of the bolt 4 passes through a circular hole in the middle of the sealing bag 71, and the iron sheet 41 is magnetically attracted to the magnet 5; A truncated cone-shaped protrusion is provided in the middle of the magnet 5, and the end with a smaller diameter is arranged close to the bolt 4. The upper part of the magnet 5 is connected to a U-shaped push rod 73 through a vertical rod, and the two side edges of the push rod 73 are arranged correspondingly to the metal sheet 72 in the horizontal direction; the size of the through hole on the accommodating cavity 23 is larger than the size of the bottom surface of the smaller diameter of the protrusion, and smaller than the size of the bottom surface of the larger diameter of the protrusion.

[0033] In the above technical solution, an annular sealing bag 71 is provided in the accommodating cavity 23, which is placed on the side of the magnet 5 close to the bolt 4, and its lateral projection just completely covers each welding point 16. The purpose is to allow the heat generated by the sealing bag 71 to be accurately transferred to the welding point 16 when necessary, to ensure that the welding point is heated evenly. The sealing bag 71 is similar to the common heat in life. The sealing bag 71 is filled with a supersaturated sodium acetate solution. It is in an unstable state. As long as it is slightly stimulated by the outside world, crystallization will occur, and this process will release a lot of heat. A groove is provided on the inner wall of one side of the sealing bag 71, and a metal sheet 72 that reacts with the supersaturated sodium acetate solution is movably arranged inside the groove. The metal sheet 72 is made of stainless steel and has good toughness and corrosion resistance. When subjected to external forces, it can be easily deformed, thereby triggering the crystallization reaction of the supersaturated sodium acetate solution. The free end of the bolt 4 is connected to the circular iron sheet 41 by a high-precision deep groove ball bearing, so that the circular iron sheet 41 can be flexibly rotated around the free end of the bolt 4, without limiting the bolt rotation and screwing in or out. The free end of the bolt 4 passes through the circular hole pre-opened in the middle of the sealing bag 71, and the iron sheet 41 is magnetically attracted to the magnet 5, and is tightly adsorbed together by a strong magnetic force, so that the whole structure remains stable during operation. A truncated cone-shaped protrusion is provided in the middle of the magnet 5, and the end with a smaller diameter is arranged near the bolt 4. The upper part of the magnet 5 is connected to a U-shaped push rod 73 through a solid stainless steel vertical rod. The two sides of the U-shaped push rod 73 are arranged in correspondence with the metal sheet 72 in the transverse direction. The through hole size on the accommodating cavity 23 is larger than the bottom size of the smaller diameter of the protrusion, and smaller than the bottom size of the larger diameter of the protrusion. When the support device needs to be disassembled, the bolt 4 is moved outward to drive the magnet 5 to move, and then the U-shaped push rod 73 pushes the metal sheet 72, just like bending a hot metal sheet, which promotes the crystallization and heat release of the supersaturated sodium acetate solution, realizes the heating of the welding point 16, and facilitates the subsequent disassembly.

[0034] In another technical solution, the side wall of the accommodating cavity 23 adjacent to the welding point 16 of the pipeline construction support device is made of heat-conductive material to improve the thermal conductivity, accelerate the breaking of the welding point, and thus improve the efficiency of the disassembly work.

[0035] In another technical solution, in the support device for pipeline construction, a lifting lug 12 is provided on the top of each retaining plate 1, so as to facilitate the crane to hoist the entire support device.

[0036] In another technical solution, the support device for pipeline construction has a sealing plug made of silicone material on the outside of the first bolt hole 15. The sealing plug is provided to prevent foreign impurities such as soil from entering from the outside of the first bolt hole and affecting the normal use of the bolt.

[0037] In another technical solution, the support device for pipeline construction has an openable / closable cover on the top of the accommodating chamber 23. The cover is provided to facilitate the placement of magnets into the accommodating chamber 23 after the bolts are installed in place, and to facilitate the replacement of the sealing bag in the accommodating chamber.

[0038] In another technical solution, the pipeline construction support device and the method for using the pipeline construction support device include the following steps: Step 1: insert the two ends of the connecting rod 2 into the two insertion grooves 13 on the inner side of a pair of retaining plates 1 respectively. After being inserted into place, the elastic pin 14 is accommodated in the card slot 21, and the guide column 24 is located in the guide slot 131; shape memory alloy welding material is used at the contact part between the connecting rod 2 and the inner side of the retaining plate 1, and multiple welding points 16 are formed by spot welding at intervals; Step 2: Open the cover on the top of the accommodating chamber 23, put the sealing bag 71 filled with supersaturated sodium acetate solution into the accommodating chamber 23, and the circular hole in the middle of the sealing bag 71 corresponds to the through hole on the accommodating chamber 23; pass the bolt 4 through the first bolt hole 15, the second bolt hole 22 and the through hole in the accommodating chamber 23 in a horizontal direction, and pass through the circular hole in the middle of the sealing bag 71, and then seal the outside of the first bolt hole 15 with a sealing plug; Step 3: Place the magnet 5 into the accommodating cavity 23 so that the protrusion corresponds to and is adjacent to the free end of the bolt 4 in the horizontal direction, and close the cover; Step 4: Connect the lifting lug 12 to the hook of the lifting equipment, and use the lifting equipment to lift the support device into the groove of the pipeline slot, so that the two retaining plates 1 are close to the inner wall of the groove, and release the hook of the lifting equipment; adjust the length of the connecting rod 2, and push the two retaining plates 1 outward so that the two retaining plates 1 are close to the inner wall of the groove; cover the safety cover 3 on the top of the two retaining plates 1; Step 5: insert the pipe to be laid from below the connecting rod 2 and lay it in the groove along the longitudinal direction; Step 6. After the pipeline is laid, remove the safety cover 3 from the top of the two retaining plates 1, adjust the length of the connecting rod 2, shrink the two retaining plates 1 inward so that the two retaining plates 1 do not contact the inner wall of the groove, and use the lifting equipment to take the supporting device out of the groove; open the sealing plug and take out the bolt 4. The bolt 4 moves horizontally during the removal process, driving the magnet 5 to move horizontally, and drives the push rod 73 to move toward the corresponding metal sheet 72 and generate a driving force on both sides of the metal sheet 72, so that the metal sheet 72 is twisted and deformed. The metal sheet 72 reacts with the supersaturated sodium acetate solution, and the supersaturated sodium acetate in the sealing bag 71 crystallizes. Heat is released during the crystallization process, which heats the welding point 16. The heated welding point 16 cracks and breaks, and the two ends of the connecting rod 2 are taken out from the plug-in slot 13 of the retaining plate 1 to complete the disassembly of the supporting device.

[0039] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0040] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A support device for pipeline construction, characterized in that: include: A pair of retaining plates are respectively abutted against the pipeline slot wall; a plug-in slot is provided on the inner side of each retaining plate, and elastic pins are provided on both sides; a first bolt hole is provided on the retaining plate, which is connected to the plug-in slot and is coaxially arranged; A connecting rod is arranged between a pair of retaining plates, and is a telescopic rod body; the two ends of the connecting rod are respectively inserted into two plug-in slots on the pair of retaining plates, and the end of the connecting rod is provided with a slot adapted to the elastic pin; the end of the connecting rod is provided with a second bolt hole corresponding to the first bolt hole; an accommodating cavity is provided in the connecting rod, and a through hole communicating with the second bolt hole is provided on the cavity; A bolt, which passes through the first bolt hole, the second bolt hole and the through hole in sequence in the transverse direction and extends into the accommodating cavity; A magnet is located in the accommodating cavity and can be magnetically connected to the end of the bolt; A safety cover plate, which is arranged on the top of a pair of retaining plates; Wherein, a plurality of welding points are arranged at intervals at the contact position between the end of the connecting rod and the retaining plate, and each welding point is welded with shape memory alloy welding material.

2. The support device for pipeline construction according to claim 1, characterized in that: A plurality of guide holes are arranged at the bottom of each plug-in slot; and a plurality of guide posts corresponding to the plurality of guide holes are arranged at the end of the connecting rod.

3. The support device for pipeline construction according to claim 2, characterized in that: A mounting groove for placing the side of the safety cover plate is arranged on the top of each retaining plate, and an anti-skid texture or anti-skid coating is arranged on the inner wall of the mounting groove.

4. The support device for pipeline construction according to claim 3, characterized in that: Each retaining plate is provided with a movable rod elastically sliding in the vertical direction, which is an L-shaped structure, the horizontal free end of the movable rod extends into the installation groove and is located below the safety cover plate, and the vertical free end extends vertically downward into the elastic pin located at the upper part and is slidably connected with the elastic pin in the vertical direction; An annular limiting groove is provided on the bolt; a limiting hole connected to the second bolt hole is provided at the bottom of the slot, and a limiting rod is elastically slidably provided in the limiting hole along the vertical direction, and the limiting rod is correspondingly arranged along the vertical direction with the movable rod; When the safety cover is placed on the two retaining plates, the vertical portion of the movable rod moves downward through the elastic pin and pushes the limiting rod downward so that the bottom of the limiting rod extends into the limiting groove.

5. The support device for pipeline construction according to claim 4, characterized in that: An annular sealing bag is provided in the accommodating cavity, which is located on the side of the magnet close to the bolt, and the sealing bag covers each welding point along the lateral projection; The interior of the sealed bag is filled with a supersaturated sodium acetate solution, and a groove is provided on the inner wall of one side of the sealed bag, and a metal sheet that reacts with the supersaturated sodium acetate solution is movably arranged inside the groove; The free end of the bolt is provided with a circular iron sheet through a bearing member for rotation, the free end of the bolt passes through a circular hole in the middle of the sealing bag, and the iron sheet is magnetically attracted to the magnet; A truncated cone-shaped protrusion is provided in the middle of the magnet, and the end with a smaller diameter is arranged close to the bolt. The upper part of the magnet is connected to a U-shaped push rod through a vertical rod, and the two side edges of the push rod are arranged correspondingly to the metal sheet in the horizontal direction; the size of the through hole on the accommodating cavity is larger than the size of the bottom surface of the protrusion with a smaller diameter, and smaller than the size of the bottom surface of the protrusion with a larger diameter.

6. The support device for pipeline construction according to claim 5, characterized in that: The side wall of the accommodating cavity adjacent to the welding point is made of heat-conducting material.

7. The support device for pipeline construction according to claim 6, characterized in that: A lifting lug is provided on the top of each retaining plate.

8. The support device for pipeline construction according to claim 7, characterized in that: A sealing plug made of silicone material is arranged on the outer side of the first bolt hole.

9. The support device for pipeline construction according to claim 7, characterized in that: An openable / closable cover is provided on the top of the accommodating cavity.

10. The support device for pipeline construction according to claim 9, characterized in that: The method for using the support device for pipeline construction includes the following steps: Step 1: insert the two ends of the connecting rod into the two plug-in slots on the inner side of a pair of retaining plates respectively. After the insertion is in place, the elastic pin is accommodated in the slot and the guide column is located in the guide slot; shape memory alloy welding material is used at the contact part between the connecting rod and the inner side of the retaining plate, and multiple welding points are formed by spot welding at intervals; Step 2, open the cover on the top of the accommodating chamber, put the sealing bag filled with supersaturated sodium acetate solution into the accommodating chamber, and the circular hole in the middle of the sealing bag corresponds to the through hole on the accommodating chamber; pass the bolt through the first bolt hole, the second bolt hole and the through hole in the accommodating chamber at one time in the horizontal direction, and extend it into the accommodating chamber, and pass through the circular hole in the middle of the sealing bag, and then seal the outside of the first bolt hole with a sealing plug; Step 3: Place the magnet into the accommodating cavity so that the protrusion corresponds to and is adjacent to the free end of the bolt in the horizontal direction, and close the cover; Step 4: Connect the lifting lug to the hook of the lifting equipment, and use the lifting equipment to lift the support device into the groove of the pipeline slot, so that the two retaining plates are close to the inner wall of the groove, and release the hook of the lifting equipment; adjust the length of the connecting rod, push the two retaining plates outward so that the two retaining plates are close to the inner wall of the groove; cover the safety cover on the top of the two retaining plates; Step 5: Insert the pipe to be laid from below the connecting rod and lay it in the groove longitudinally; Step 6. After the pipeline is laid, remove the safety cover from the top of the two retaining plates, adjust the length of the connecting rod, shrink the two retaining plates inward so that the two retaining plates are not in contact with the inner wall of the groove, and use the lifting equipment to take the supporting device out of the groove; open the sealing plug and take out the bolts. During the removal of the bolts, they move horizontally, driving the magnet to move horizontally, and driving the push rod to move toward the corresponding metal sheet and generate a driving force on both sides of the metal sheet, causing the metal sheet to twist and deform. The metal sheet reacts with the supersaturated sodium acetate solution, and the supersaturated sodium acetate in the sealing bag crystallizes. Heat is released during the crystallization process, which heats the welding point. The heated welding point cracks and breaks, and the two ends of the connecting rod are taken out from the plug-in slot of the retaining plate to complete the disassembly of the supporting device.

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