Chemical plant truss connecting structure with composite waterproof layer

Abstract

The invention discloses a chemical plant truss connecting structure with a composite waterproof layer, and relates to the technical field of connecting structures, the connecting structure comprises a lower chord member, a web member and an upper chord member, one end of the web member is welded and connected with an end plate, the surface of the lower chord member is welded and connected with a plurality of welding cylinders, and a ring sleeve is arranged at the position of a welding gap; a gusset plate matched with the end plate is welded to the upper portion of the welding cylinder, a connecting mechanism used for being connected with the end plate is arranged in the gusset plate, an inner arc plate at one end of a connecting rod is driven by a first inclined plate to be matched with the waterproof sleeve, and after the end plate is matched with the gusset plate, an inclined extrusion rod is pushed through the inclined face of an inclined extrusion plate to slide in the gusset plate. According to the gusset plate, the waterproof sleeve made of an ethylene propylene diene monomer material is fully limited and fixed, so that the waterproof sleeve isolates external corrosive gas and water vapor generated in a plant, and parts in the gusset plate are protected effectively.

Description

Technical Field

[0001] This invention relates to the field of connection structure technology, and in particular to a truss connection structure for a chemical plant with a composite waterproof layer. Background Technology

[0002] A chemical plant truss is a steel structure load-bearing frame used in the production area of ​​a chemical plant. Essentially, it is a triangular / quadrilateral unit structure composed of steel pipes (or shaped steel) connected by nodes. Its core features are "large span, light weight, and high load-bearing capacity," which is specifically adapted to the special needs of chemical plants. Since corrosive gases are easily generated inside chemical plants, waterproof and anti-corrosion structures (such as EPDM rubber seals) are usually made at the truss nodes. The materials used are mostly corrosion-resistant steel to avoid the impact of acid mist, water vapor, and other corrosive media on structural safety.

[0003] In the current technology, chemical plant trusses are usually composed of main load-bearing chords and auxiliary force-transmitting web members. For large-size trusses, the conventional practice is to weld end plates at both ends of the web members and weld node plates on the outside of the chord members. When the truss is erected, the web member end plates and chord member node plates are connected and fixed together to quickly complete the assembly. However, the cross-sectional dimensions of the web members are usually smaller than those of the chord members, making them more susceptible to corrosion by corrosive gases. Furthermore, the end plates welded to the ends of the web members and the node plates welded to the surface of the chord members are often connected by bolts. Corrosive media can easily penetrate into the gaps between the plates, corroding the end plates, node plates, and bolts from the inside, thereby disrupting the uniformity of force transmission in the web members. Long-term use will weaken the structural stability of the truss. Moreover, if bolts or other components are corroded by corrosive gases, they are extremely difficult to remove from the connection between the end plate and the node plate, which will increase the difficulty of replacing the web members or chord members later. To address this, we propose a truss connection structure for chemical plant buildings with a composite waterproof layer. Summary of the Invention

[0004] To address the problem that the end plates welded to the ends of web members and the node plates welded to the surfaces of chord members are often connected by bolts, corrosive media can easily penetrate into the gaps between the plates, causing internal corrosion of the end plates, node plates, and bolts, thereby disrupting the uniformity of force transmission in the web members, this invention adopts the following technical solution: A truss connection structure for a chemical plant building with a composite waterproof layer includes a lower chord, a web member, and an upper chord. One end of the web member is welded to an end plate. Multiple welding cylinders are welded to the surface of the lower chord, and a ring is provided at the welding gap. A node plate that mates with the end plate is welded above the welding cylinder. A connecting mechanism for connecting the end plate is provided inside the node plate. The connecting mechanism includes a fixed chamber fixedly connected inside the node plate. A sliding rod is slidably connected inside the fixed chamber. One end of the sliding rod is fixedly connected to a sliding column and a first inclined plate. A second inclined plate is slidably connected to the surface of the sliding rod. A fixed rod is fixedly connected to one side of the second inclined plate. One end of the fixed rod is rotatably engaged with a rotating cylinder, and a spiral groove is formed inside the rotating cylinder. The sliding column slides inside the spiral groove. A first rubber sleeve is detachably connected to one end of the first inclined plate, and a second rubber sleeve is detachably connected to one end of the second inclined plate. The first inclined plate slides inside the second inclined plate.

[0005] Preferably, a sliding plate is fixedly connected to the outer side of the first inclined plate, a mating groove is provided inside the second inclined plate, the sliding plate is adapted to the mating groove, a trapezoidal block is fixedly connected to the lower part of the end plate, and an installation groove is provided at the center of the fixed compartment. Both the trapezoidal block and the installation groove are trapezoidal in shape.

[0006] Preferably, the node plate has a waterproof groove inside, and a waterproof sleeve is provided inside the waterproof groove. A pair of inclined extrusion plates are fixedly connected to the bottom of the end plate. A pair of inclined extrusion rods are slidably engaged inside the node plate. The inclined extrusion rods are located outside the waterproof sleeve, and the side in contact with the waterproof sleeve is arc-shaped.

[0007] Preferably, the node plate is provided with an auxiliary mechanism for improving the stability of the first rubber sleeve and the second rubber sleeve. The auxiliary mechanism includes a top rod that is slidably connected to the fixed chamber. One end of the top rod is fixedly connected to a push rod, and both ends of the push rod are fixedly connected to limit blocks. The limit blocks are slidably connected to the node plate.

[0008] Preferably, the node plate has a pair of sliding grooves inside, and the sliding grooves are inclined. A movable plate is fixedly connected to the lower part of the first rubber sleeve and the second rubber sleeve. The movable plate slides inside the sliding groove. A return spring is provided at the sliding position of the top rod and the fixed chamber. The push rod is telescopic.

[0009] Preferably, the height of the fixing rod is higher than the height of the first inclined plate, a connecting rod is fixedly connected to one side of the first inclined plate, and an inner arc plate is fixedly connected to one end of the connecting rod. The inner arc plate is arc-shaped near the inner side of the waterproof sleeve.

[0010] Preferably, the node plate is further provided with a moving groove inside, the inclined extrusion rod is located inside the moving groove, and the inner arc plate has the same shape as the inner side of the moving groove.

[0011] Preferably, the end plate and the node plate are made of corrosion-resistant materials, the outer arc surfaces of the first rubber sleeve and the second rubber sleeve are thickened, a sealing gasket is provided in the gap between the end plate and the node plate, and the surface of the rotating cylinder is threaded.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. The relative movement of the first and second inclined plates drives the relative movement of the second and first rubber sleeves, allowing the bolts to engage with both. This enables the bolts to fully compress both, improving bolt stability and providing waterproof and corrosion protection. This facilitates subsequent replacement of the web members and upper chord members. Furthermore, the connection between the end plates and node plates allows for rapid assembly of the truss, improving connection efficiency and facilitating truss erection.

[0013] 2. When the push rod at one end of the push rod is driven by the trapezoidal block under the end plate to move away from the center of the node plate, the limiting blocks at both ends of the push rod will slide inside the groove opened inside the node plate, thereby supporting and stabilizing the first and second rubber sleeves. This can improve the effect of the subsequent bolts cooperating with the first and second rubber sleeves, and effectively improve the stability of the first and second rubber sleeves.

[0014] 3. The inner arc plate at one end of the connecting rod is driven by the first inclined plate to cooperate with the waterproof sleeve. After the end plate cooperates with the node plate, the inclined extrusion plate pushes the inclined extrusion rod to slide inside the node plate, thereby fully limiting and fixing the waterproof sleeve made of EPDM rubber material. This isolates the waterproof sleeve from external corrosive gases and water vapor generated in the factory, thereby protecting the internal parts of the node plate and effectively protecting the internal parts of the node plate. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the chord and web members of the present invention; Figure 2 This is a schematic diagram of the structure of the end plate and node plate of the present invention; Figure 3 This is a schematic diagram of the connection mechanism of the present invention; Figure 4 This is an exploded view of the end plate and node plate of the present invention; Figure 5 This is a schematic diagram of the structure of the first inclined plate and the second inclined plate of the present invention; Figure 6 This is an exploded view of a portion of the connecting mechanism of the present invention; Figure 7 For the present invention Figure 5 A magnified view of a section at point A in the middle; Figure 8 This is a schematic diagram of the connecting rod and inner arc plate of the present invention; Figure 9 This is a schematic diagram of the auxiliary mechanism of the present invention; Figure 10 This is a partially enlarged view of the auxiliary mechanism of the present invention.

[0017] In the diagram: 1. Lower chord; 2. Welded cylinder; 3. Web member; 4. Upper chord; 5. End plate; 6. Node plate; 7. Connecting mechanism; 701. Fixed chamber; 702. Sliding rod; 703. Fixed rod; 704. Sliding column; 705. Rotating cylinder; 706. First inclined plate; 707. Second inclined plate; 708. First rubber sleeve; 709. Second rubber sleeve; 710. Sliding plate; 711. Mating groove; 712. Connecting rod; 713. Inner arc plate; 8. Auxiliary mechanism; 801. Top rod; 802. Limiting block; 803. Push rod; 804. Moving groove; 805. Sliding groove; 806. Moving plate; 9. Inclined extrusion plate; 10. Waterproof sleeve; 11. Ring sleeve; 12. Inclined extrusion rod; 13. Trapezoidal block. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Reference Figures 1 to 7 A chemical plant truss connection structure with a composite waterproof layer includes a lower chord 1, a web member 3 and an upper chord 4. One end of the web member 3 is welded to an end plate 5. Multiple welding cylinders 2 are welded to the surface of the lower chord 1, and a ring sleeve 11 is provided at the welding gap. A node plate 6 that cooperates with the end plate 5 is welded above the welding cylinder 2. A connecting mechanism 7 for connecting the end plate 5 is provided inside the node plate 6. The connecting mechanism 7 includes a fixed chamber 701 fixedly connected inside the node plate 6. A slide rod 702 is slidably connected inside the fixed chamber 701. A slide column 704 and a first inclined plate 706 are fixedly connected to one end of the slide rod 702. A second inclined plate 707 is slidably connected to the surface of the slide rod 702. A fixed rod 703 is fixedly connected to one side of the second inclined plate 707. A rotating cylinder 705 is rotatably engaged at one end of the fixed rod 703. A spiral groove is opened inside the rotating cylinder 705. The slide column 704 slides inside the spiral groove. A first rubber sleeve 708 is detachably connected to one end of the first inclined plate 706. A second rubber sleeve 709 is detachably connected to one end of the second inclined plate 707. The first inclined plate 706 slides inside the second inclined plate 707.

[0020] During operation, the corrosive gases and water vapor in the chemical plant will continuously erode the connection between the end plate 5 and the node plate 6 from the inside out. After the truss is assembled, the bolts and other parts inside the node plate 6 are prone to rust due to the corrosive gases and water vapor. This will not only affect the subsequent replacement of the lower chord 1, web member 3 and upper chord 4, but also greatly affect the connection stability between the end plate 5 and the node plate 6, reducing the overall support force of the truss. Therefore, when the end plate 5 at one end of the web member 3 engages with the node plate 6 welded above the welding cylinder 2, the slide rod 702 located inside the fixed chamber 701 moves laterally. The movement of the slide rod 702 will drive the slide column 704 and the first inclined plate 706 to move synchronously. At this time, the slide column 704 will slide in the spiral groove opened inside the rotating cylinder 705. Since the slide column 704 and the slide rod 702 are fixedly connected, when it slides in the spiral groove inside the rotating cylinder 705, it will push the rotating cylinder 705 to rotate inside the fixed chamber 701. And since the rotating cylinder 705 and the fixed chamber 701 are threadedly connected, the rotation of the rotating cylinder 705 will push the rotating cylinder 705 to rotate inside the fixed chamber 701. The center position of 01 moves in a rotating state, and during the rotation of the rotating cylinder 705, it will push the second inclined plate 707 at one end of the fixed rod 703 to move. At this time, the first inclined plate 706 driven by the sliding rod 702 and the second inclined plate 707 driven by the fixed rod 703 will move in a cross relative motion, respectively driving the first rubber sleeve 708 and the second rubber sleeve 709 to move towards the threaded groove position opened inside the node plate 6. When the sliding rod 702 has completed its movement, the first rubber sleeve 708 and the second rubber sleeve 709 are just above the threaded hole opened inside the node plate 6, which facilitates subsequent mating with bolts and achieves the purpose of waterproofing and corrosion prevention. Furthermore, when the web member 3 is under load, the force is transmitted to the end plate 5 through the web member 3. By utilizing the full contact between the end plate 5 and the node plate 6, the pressure is evenly transmitted to the node plate 6, avoiding local stress concentration. At the same time, the welded fixing structure between the node plate 6 and the upper chord member 4 can further disperse the force to the upper chord member 4, ensuring the high efficiency of force transmission. It should be noted that after the end plate 5 is fully engaged with the node plate 6, the bolt is then installed from the threaded hole inside the end plate 5 into the threaded hole inside the node plate 6. When the bolt rotates, it will press down on the first rubber sleeve 708 and the second rubber sleeve 709. After the bolt is installed, the first rubber sleeve 708 and the second rubber sleeve 709 will deform under the pressure, so that the inner sides of the first rubber sleeve 708 and the second rubber sleeve 709 can fully contact the threads on the bolt surface. The first rubber sleeve 708 and the second rubber sleeve 709 are made of EPDM rubber, which not only has a certain toughness, but also prevents corrosive gases and moisture in the chemical plant from corroding the bolt after installation. On the one hand, it can improve the stability of the bolt installation, and on the other hand, it can protect the bolt and avoid serious corrosion, which would affect the disassembly of the lower chord 1, the web member 3, or the upper chord 4. It should be explained that by the cross-relative movement of the first rubber sleeve 708 and the second rubber sleeve 709, they are positioned directly above the threaded holes inside the node plate 6. After the first rubber sleeve 708 and the second rubber sleeve 709 have completed their movement, the bolt installation can still be precisely positioned. There is no need to perform hole finding operations when installing bolts, which can speed up the installation efficiency of the end plate 5 and the node plate 6, and enable the lower chord 1, the web member 3 and the upper chord 4 to be assembled quickly, shortening the erection time. It should be reiterated that before the end plate 5 and the node plate 6 are assembled, the end plate 5 is first welded to both ends of the web member 3. Then, the welding cylinder 2 is welded to the surface of the lower chord member 1, and a ring 11 made of EPDM rubber is filled in the gap between the lower chord member 1 and the welding cylinder 2. At this time, the ring 11 and the welding cylinder 2 are connected by welding, and the weld is coated with waterproof material. This can improve the stability of the connection between the welding cylinder 2 and the lower chord member 1, prevent corrosive gases and moisture in the factory from eroding the connection between the welding cylinder 2 and the lower chord member 1, and improve the stability of the connection after the node plate 6 above the welding cylinder 2 is assembled with the end plate 5. Qualitatively, by welding and fixing multiple welding cylinders 2 to the surface of the upper chord 4, the upper end of the web member 3 is also detachably connected to the welding cylinders 2 on the surface of the upper chord 4 through the end plate 5. If it is necessary to replace the web member 3 with a small cross-sectional area, since the end plates 5 are welded to both ends of the web member 3, they can cooperate with the node plates 6 on the upper chord 4 and the lower chord 1 respectively. When replacing, the bolts at both ends can be removed, and then the web member 3 can be replaced. This not only improves the efficiency of replacement, but also ensures that the end plate 5 and the node plate 6 can be stably connected after cooperation, improving the overall stability of the truss after assembly and avoiding uneven stress on the truss due to the influence of erosion.

[0021] Reference Figures 3 to 7A sliding plate 710 is fixedly connected to the outer side of the first inclined plate 706. A mating groove 711 is provided inside the second inclined plate 707. The sliding plate 710 is adapted to the mating groove 711. A trapezoidal block 13 is fixedly connected to the lower part of the end plate 5. An installation groove is provided at the center of the fixed chamber 701. Both the trapezoidal block 13 and the installation groove are trapezoidal in shape.

[0022] During operation, before the end plate 5 and the node plate 6 are engaged, a trapezoidal block 13 is first fixedly connected below the end plate 5. Then, a trapezoidal mounting groove is opened at the center of the fixed chamber 701. When the end plate 5 is not engaged with the node plate 6, one end of the slide rod 702 is in an extended state inside the fixed chamber 701. When the trapezoidal block 13 below the end plate 5 is inserted into the mounting groove opened inside the fixed chamber 701, the trapezoidal block 13 will push the slide rod 702 to slide inside the fixed chamber 701 through the trapezoidal inclined surface. After the first rubber sleeve 708 and the second rubber sleeve 709 have completed their movement, they can also accurately position the subsequent bolt installation, so that the web member 3 and the lower chord member 1 can be stably connected. It should be noted that if the web rod 3 welded to the end plate 5 needs to be replaced, when the trapezoidal block 13 below the end plate 5 is no longer in the mounting slot opened at the center of the fixed chamber 701, the inclined surface of the trapezoidal block 13 will no longer apply pressure to one end of the slide rod 702. At this time, the slide rod 702 will move in the opposite direction under the force of the return spring, so that one end of the slide rod 702 continues to be extended inside the fixed chamber 701. At this time, the first rubber sleeve 708 and the second rubber sleeve 709 will also be removed from above the threaded hole. If the wear and corrosion of the first rubber sleeve 708 and the second rubber sleeve 709 are serious, the operator needs to replace them. If the wear and corrosion are minor, they can continue to be used to facilitate the next positioning and protection of the threads. It should be reiterated that when the fixed rod 703, which is rotated and engaged on one side of the rotating cylinder 705, pushes the second inclined plate 707 to slide on the surface of the slide rod 702, the sliding plate 710, which is fixedly connected to the outside of the first inclined plate 706, will slide inside the mating groove 711 opened inside the second inclined plate 707. Since the first inclined plate 706 and the second inclined plate 707 move in a cross-relative manner, the sliding plate 710 adopts a rhomboid shape with rounded corners (the rounded corner radius is set to 2mm), and the mating gap between the sliding plate 710 and the mating groove 711 is controlled at 0.5mm. When the sliding plate 710 slides, it can fully and without interference fit with the mating groove 711, so that the first inclined plate 706 can slide stably inside the second inclined plate 707. This drives the first rubber sleeve 708 and the second rubber sleeve 709 to move stably inside the node plate 6 to directly above the threaded hole, so that the bolt can be accurately fitted into the threaded hole and can protect it from corrosive gases and moisture, which would affect the subsequent replacement of the web rod 3.

[0023] Reference Figures 3 to 4 The node plate 6 has a waterproof groove inside, and a waterproof sleeve 10 is installed inside the waterproof groove. A pair of inclined extrusion plates 9 are fixedly connected to the bottom of the end plate 5. A pair of inclined extrusion rods 12 are slidably engaged inside the node plate 6. The inclined extrusion rods 12 are located outside the waterproof sleeve 10, and the side that contacts the waterproof sleeve 10 is arc-shaped.

[0024] During operation, after the end plate 5 and the node plate 6 are engaged, before the bolts are installed into the threaded holes inside the node plate 6, the end plate 5 will drive a pair of inclined extrusion plates 9 to insert into the interior of the node plate 6. At this time, the inclined extrusion plates 9 will contact the inclined surfaces of the inclined extrusion rods 12 through their inclined surfaces, thereby pushing the pair of inclined extrusion rods 12 to move towards the center position of the node plate 6. Since the inclined extrusion rods 12 are located outside the waterproof sleeve 10, after the inclined extrusion rods 12 push the waterproof sleeve 10 through their arc surfaces, the waterproof sleeve 10 will be in a tightened state inside the waterproof groove, thus fully fitting against one side of the waterproof groove. After the end plate 5 and the node plate 6 are connected by bolts, the waterproof sleeve 10 can prevent external corrosive gases and moisture generated in the factory from entering the interior of the end plate 5 and the node plate 6, and can once again protect the bolts and other parts inside the node plate 6. It should be noted that, since the inner side of the inclined extrusion plate 9 is inclined, and the outer side of the inclined extrusion rod 12 is inclined, and the position of the inclined extrusion rod 12 is located inside the inclined extrusion plate 9, when the inclined extrusion plate 9 is inserted into the interior of the node plate 6, the inclined surface of the inclined extrusion plate 9 will contact the inclined surface of the inclined extrusion rod 12, thereby pushing the inclined extrusion rod 12 to move towards the center position of the node plate 6, thereby adjusting the tightness of the waterproof sleeve 10. This allows the waterproof sleeve 10 to fit tightly inside the waterproof groove opened inside the node plate 6, isolating it from external corrosive gases and moisture generated in the factory, and protecting the bolts and other parts inside the node plate 6 from the outside.

[0025] Reference Figures 8 to 10 The node plate 6 is provided with an auxiliary mechanism 8 for improving the stability of the first rubber sleeve 708 and the second rubber sleeve 709. The auxiliary mechanism 8 includes a top rod 801 that is slidably connected to the fixed chamber 701. One end of the top rod 801 is fixedly connected to a push rod 803. Both ends of the push rod 803 are fixedly connected to limit blocks 802. The limit blocks 802 are slidably connected to the node plate 6.

[0026] During operation, after the trapezoidal block 13 below the end plate 5 mates with the mounting groove inside the fixed chamber 701, the trapezoidal block 13 will push the push rod 801 to slide inside the fixed chamber 701 via the inclined surface. At this time, the push rod 801 will drive the limiting blocks 802 set at both ends of the push rod 803 to slide inside the node plate 6. When the first rubber sleeve 708 and the second rubber sleeve 709 move to the position of the threaded groove inside the node plate 6, one side of the limiting block 802 will contact the outer side of the first rubber sleeve 708 and the second rubber sleeve 709. When the first rubber sleeve 708 and the second rubber sleeve 709 are squeezed during subsequent bolt installation, a pair of limiting blocks 802 can prevent insufficient contact between the bolt and the inner side of the first rubber sleeve 708 and the second rubber sleeve 709, so that the first rubber sleeve 708 and the second rubber sleeve 709 fit more fully with the bolt thread, avoiding deformation or displacement of the first rubber sleeve 708 and the second rubber sleeve 709 due to the extrusion force of the bolt, and effectively improving the stability of the fit between the first rubber sleeve 708 and the second rubber sleeve 709 and the bolt; It should be noted that when the trapezoidal block 13 below the end plate 5 is not inserted into the mounting slot opened inside the fixed chamber 701, one end of the push rod 801 is in an extended state inside the fixed chamber 701, while the push rods 803 at both ends are outside the first rubber sleeve 708 and the second rubber sleeve 709 and do not contact them. When the first rubber sleeve 708 and the second rubber sleeve 709 move towards the threaded hole, the limiting block 802 will move to the outside of the first rubber sleeve 708 and the second rubber sleeve 709, thereby improving the stability of the first rubber sleeve 708 and the second rubber sleeve 709 made of EPDM rubber after they are fitted with the bolt, so that the first rubber sleeve 708 and the second rubber sleeve 709 can fully protect the bolt.

[0027] Reference Figures 8 to 10 The node plate 6 has a pair of sliding grooves 805 inside, and the sliding grooves 805 are inclined. The first rubber sleeve 708 and the second rubber sleeve 709 are fixedly connected to the lower part of the moving plate 806. The moving plate 806 slides inside the sliding groove 805. The push rod 801 is provided with a return spring at the sliding position of the fixed chamber 701. The push rod 803 is telescopic.

[0028] During operation, a spring limiting platform is first installed on the push rod 801, and a spring seat is installed inside the fixed chamber 701. When the trapezoidal block 13 below the end plate 5 no longer pushes the push rod 801 to slide inside the fixed chamber 701 via the inclined surface, the push rod 801 will be reset under the force of the reset spring installed in the spring seat. This will drive the limiting blocks 802 at both ends of the push rod 803 to reset inside the slide groove 805, no longer contacting the outer sides of the first rubber sleeve 708 and the second rubber sleeve 709, thus limiting and stabilizing them. When the push rod 801 drives the limiting blocks 802 at both ends of the push rod 803 to move to the outer positions of the first rubber sleeve 708 and the second rubber sleeve 709, the moving plate 806 below the first rubber sleeve 708 and the second rubber sleeve 709 will also slide inside the slide groove 805. Because the slide 805 is inclined inside the node plate 6, the first rubber sleeve 708 and the second rubber sleeve 709 above the moving plate 806 will be in a slightly raised state after movement. When the subsequent bolts cooperate with the first rubber sleeve 708 and the second rubber sleeve 709, the inner sides of the first rubber sleeve 708 and the second rubber sleeve 709 can better contact the surface of the bolt, which can effectively improve the stability and protection of the bolt installation. Furthermore, when the push rod 801 drives the limiting blocks 802 at both ends of the push rod 803 to slide inside the slide 805, because the slide 805 is also folded and adopts a 15° folded inclined design with a transition rounded corner, it can avoid the movement jamming of the moving plate 806 and the limiting block 802. Figure 10 As shown, when the push rod 803 drives the limit block 802 to slide inside the slide groove 805, the push rod 803 will be in a telescopic state to drive the limit block 802 to move, so as to avoid the limit block 802 from getting stuck during the movement and improve the smoothness of the movement of the limit block 802. It should be noted that, in the initial state, the movable plate 806 below the first rubber sleeve 708 and the second rubber sleeve 709 is in the most inclined position inside the slide groove 805. At this time, the lower ends of the first rubber sleeve 708 and the second rubber sleeve 709 above the movable plate 806 are always in contact with the inner side of the node plate 6. When the movable plate 806 drives the first rubber sleeve 708 and the second rubber sleeve 709 to move slightly upward, the subsequent bolts can be better installed into the interior of the node plate 6, and the first rubber sleeve 708 and the second rubber sleeve 709 can protect them.

[0029] Reference Figures 5 to 7 The height of the fixing rod 703 is higher than the height of the first inclined plate 706. A connecting rod 712 is fixedly connected to one side of the first inclined plate 706. An inner arc plate 713 is fixedly connected to one end of the connecting rod 712. The inner arc plate 713 is arc-shaped near the inner side of the waterproof sleeve 10.

[0030] During operation, when the slide rod 702 drives the first inclined plate 706 to move in a cross-relational manner with the second inclined plate 707 inside the fixed chamber 701, the first inclined plate 706 is pushed away from the center of the fixed chamber 701 by the slide rod 702. The movement of the first inclined plate 706 will cause the inner arc plate 713 at one end of the connecting rod 712 to slide inside the node plate 6. At this time, the outer arc surface of the inner arc plate 713 will be tightly fitted with the inner side of the waterproof sleeve 10. After the inclined extrusion plate 9 pushes the inclined extrusion rod 12 to slide inside the node plate 6 through the inclined surface, the waterproof sleeve 10 is located on the inner arc plate 707. Position 13 will be in an arc shape. When the outer arc surface of the inner arc plate 713 contacts the inner side of the waterproof sleeve 10, it can improve the stability of the waterproof sleeve 10 after it is tightened, so that it can fully and tightly contact the waterproof groove opened inside the node plate 6. On the other hand, it can prevent the arc-shaped position of the waterproof sleeve 10 from becoming loose during subsequent use of the truss, which would affect its ability to isolate corrosive gases and moisture in the factory. It can effectively improve the stability of the waterproof sleeve 10, so that it can stably isolate corrosive gases and moisture, thereby protecting the internal parts of the node plate 6.

[0031] Reference Figures 8 to 10 The node plate 6 also has a moving groove 804 inside, the inclined extrusion rod 12 is located inside the moving groove 804, and the inner arc plate 713 has the same shape as the inner side of the moving groove 804.

[0032] During operation, when the inclined extrusion plate 9 below the end plate 5 engages with the inclined extrusion rod 12 to tighten the waterproof sleeve 10, the inclined extrusion rod 12 will move towards the center of the node plate 6 inside the moving groove 804. Meanwhile, the inner arc plate 713 will move away from the center of the node plate 6 under the pushing force of the first inclined plate 706. At this time, the inner arc plate 713 and the inclined extrusion rod 12 will have a relative movement tendency. When the outer arc surface of the inner arc plate 713 contacts the inner side of the waterproof sleeve 10, the inclined extrusion rod 12 will no longer push the waterproof sleeve 10. 0 is tightened inside the waterproof groove. At this time, the outer arc surface of the inner arc plate 713 is in contact with the inner side of the waterproof sleeve 10. Since the shape of the inner arc plate 713 is the same as the inner shape of the moving groove 804, the outer arc surface of the inner arc plate 713 will also be in close contact with the outer side of the moving groove 804 opened inside the node plate 6. This fully limits the position of the waterproof sleeve 10. At this time, the waterproof sleeve 10 can stably isolate external corrosive gases and water vapor during use, and has good stability, making its waterproof and anti-corrosion effect better.

[0033] Reference Figures 1 to 10 The end plate 5 and the node plate 6 are made of corrosion-resistant materials. The outer arc surfaces of the first rubber sleeve 708 and the second rubber sleeve 709 are thickened. A sealing gasket is provided in the gap between the end plate 5 and the node plate 6. The rotating cylinder 705 has threads on its surface.

[0034] During operation, by using corrosion-resistant materials for the end plate 5 and the node plate 6, the corrosion of corrosive gases and moisture can be effectively resisted. Furthermore, by thickening the outer arc surfaces of the first rubber sleeve 708 and the second rubber sleeve 709, the bolts can stably compress the first rubber sleeve 708 and the second rubber sleeve 709 during installation, ensuring that the inner surfaces of the first rubber sleeve 708 and the second rubber sleeve 709 fully fit against the threaded surfaces, thus providing ample protection for the bolts. In addition, by filling the gap between the end plate 5 and the node plate 6 with a sealing gasket made of EPDM rubber, the corrosive gases and moisture can be further isolated.

[0035] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A truss connection structure for a chemical plant building with a composite waterproof layer, comprising a lower chord (1), a web member (3), and an upper chord (4), characterized in that: One end of the web member (3) is welded to an end plate (5), and multiple welding cylinders (2) are welded to the surface of the lower chord member (1). A ring sleeve (11) is provided at the welding gap position. A node plate (6) that cooperates with the end plate (5) is welded above the welding cylinder (2). A connecting mechanism (7) for connecting the end plate (5) is provided inside the node plate (6). The connecting mechanism (7) includes a fixed chamber (701) fixedly connected inside the node plate (6). A slide rod (702) is slidably connected inside the fixed chamber (701). A slide column (704) and a first inclined plate (706) are fixedly connected to one end of the slide rod (702). A second inclined plate (707) is slidably connected to the surface of the slide rod (702). A fixed rod (703) is fixedly connected to one side of the second inclined plate (707). A rotating cylinder (705) is rotatably engaged at one end of the fixed rod (703). A spiral groove is opened inside the rotating cylinder (705). The slide column (704) slides inside the spiral groove. A first rubber sleeve (708) is detachably connected to one end of the first inclined plate (706). A second rubber sleeve (709) is detachably connected to one end of the second inclined plate (707). The first inclined plate (706) slides inside the second inclined plate (707).

2. The truss connection structure of a chemical plant building with a composite waterproof layer according to claim 1, characterized in that: A sliding plate (710) is fixedly connected to the outer side of the first inclined plate (706). A mating groove (711) is provided inside the second inclined plate (707). The sliding plate (710) is adapted to the mating groove (711). A trapezoidal block (13) is fixedly connected to the lower part of the end plate (5). An installation groove is provided at the center of the fixed chamber (701). Both the trapezoidal block (13) and the installation groove are trapezoidal in shape.

3. The truss connection structure of a chemical plant building with a composite waterproof layer according to claim 1, characterized in that: The node plate (6) has a waterproof groove inside, and a waterproof sleeve (10) is provided inside the waterproof groove. A pair of inclined extrusion plates (9) are fixedly connected to the bottom of the end plate (5). A pair of inclined extrusion rods (12) are slidably engaged inside the node plate (6). The inclined extrusion rods (12) are located outside the waterproof sleeve (10), and the side that contacts the waterproof sleeve (10) is arc-shaped.

4. The truss connection structure of a chemical plant building with a composite waterproof layer according to claim 1, characterized in that: The node plate (6) is provided with an auxiliary mechanism (8) for improving the stability of the first rubber sleeve (708) and the second rubber sleeve (709). The auxiliary mechanism (8) includes a top rod (801) that is slidably connected to the fixed chamber (701). One end of the top rod (801) is fixedly connected to a push rod (803). Both ends of the push rod (803) are fixedly connected to limit blocks (802). The limit blocks (802) are slidably connected to the node plate (6).

5. A truss connection structure for a chemical plant building with a composite waterproof layer according to claim 4, characterized in that: The node plate (6) has a pair of sliding grooves (805) inside, and the sliding grooves (805) are inclined. A movable plate (806) is fixedly connected below the first rubber sleeve (708) and the second rubber sleeve (709). The movable plate (806) slides inside the sliding groove (805). A return spring is provided at the sliding position of the top rod (801) and the fixed chamber (701). The push rod (803) is telescopic.

6. The truss connection structure of a chemical plant building with a composite waterproof layer according to claim 3, characterized in that: The height of the fixing rod (703) is higher than the height of the first inclined plate (706). A connecting rod (712) is fixedly connected to one side of the first inclined plate (706). An inner arc plate (713) is fixedly connected to one end of the connecting rod (712). The inner arc plate (713) is arc-shaped near the inner side of the waterproof sleeve (10).

7. A truss connection structure for a chemical plant building with a composite waterproof layer according to claim 6, characterized in that: The node plate (6) is also provided with a moving groove (804), the inclined extrusion rod (12) is located inside the moving groove (804), and the inner arc plate (713) has the same shape as the inner side of the moving groove (804).

8. A truss connection structure for a chemical plant building with a composite waterproof layer according to claim 1, characterized in that: The end plate (5) and the node plate (6) are made of corrosion-resistant materials. The outer arc surfaces of the first rubber sleeve (708) and the second rubber sleeve (709) are thickened. A sealing gasket is provided in the gap between the end plate (5) and the node plate (6). The surface of the rotating cylinder (705) is threaded.

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