Non-welding self-locking device for latticed shell structure
By using a non-welded self-locking device, and combining node round steel and pressure plate, the reticulated shell members can be quickly locked, which solves the problem of complicated design of welded nodes in reticulated shell structures, improves construction efficiency and safety, and reduces costs.
Patent Information
- Application Number
- CN202520154899.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-23
AI Technical Summary
The existing reticulated shell structure has a complicated welding node design and lacks standardization, resulting in complex construction, high costs and insufficient safety.
A non-welded self-locking device is adopted, which uses a combination of node round steel, grooves and pressure plates, and a connection method of plug and plug blocks to achieve rapid locking of the grid shell members, avoiding on-site welding.
It simplifies the construction process, reduces costs, improves construction efficiency and safety, and ensures the stability and uniform stress distribution of the reticulated shell structure.
Smart Images
Figure CN223753480U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of net shell installation construction, in particular to a self-locking device for non-welding of net shell structure. BACKGROUND
[0002] With the development and improvement of national energy storage technology and petroleum chemical industry, people urgently need the emergence of structures with greater free space and smaller internal support interference, such as large storage tanks, workshops, etc. The general plane structure, such as rigid frame, truss, flat net rack, etc. is limited by its structure form, and the spanning capacity is limited. Therefore, the net shell structure emerges as the times require. It is based on the rod, forms a grid according to certain rules, and has the properties of rod system and shell. It ensures the three-dimensional space stress characteristics and space working state. In addition, the net shell structure has the following characteristics: 1. Light weight feature. There is no obvious primary and secondary relationship between the components of the net shell structure. Each component can almost balance the load, and the internal force distribution is more uniform, and the stress is more reasonable. 2. It can organically combine the beauty of structure and architecture, and perfectly coordinate with the surrounding environment. 3. The calculation principle is mature and the calculation method is simple. 4. It has the characteristics of standardization and specification. As for the types of net shell nodes, only a few types such as welded hollow ball nodes, bolt ball nodes, steel plate welded nodes and hub type nodes are widely used. The common problem of the above nodes is that each node needs to be designed. If it is accurate, the types are also not few, and finally each node needs to be designed according to the type. There is no standard node manual that can be selected. CONTENT OF THE UTILITY MODEL
[0003] Therefore, the utility model provides a self-locking device for non-welding of net shell structure, so as to solve or at least alleviate the above problems existing in the prior art.
[0004] In order to achieve the above-mentioned purpose, the utility model provides a self-locking device for non-welding of net shell structure, characterized by comprising:
[0005] The net shell node comprises a node round steel, a groove and a pressing plate. The node round steel is in a columnar structure. A plurality of grooves are equidistantly arranged on the circumferential surface of the node round steel. At least one end of the groove penetrates the end surface of the node round steel in the axial direction to form a socket. The groove cavity size is larger than the groove opening size. The pressing plate is detachably installed at the end of the node round steel corresponding to the socket, and is used for plugging the socket.
[0006] The net shell rod comprises a rod body and an insertion block. The insertion block is arranged at both ends of the rod body. The insertion block is arranged to be matched with the groove, and can be inserted into the groove from the socket.
[0007] In the self-locking device for non-welding of the latticed shell structure as described above, optionally, the groove and the plug are both arranged in a semi-arc structure.
[0008] In the self-locking device for non-welding of the latticed shell structure as described above, optionally, the rod body is an I-shaped steel, and the two ends of the rod body are arranged in a tapered structure.
[0009] In the self-locking device for non-welding of the latticed shell structure as described above, optionally, the two ends of the groove are both formed with a socket, and the pressing plate is provided with two.
[0010] In the self-locking device for non-welding of the latticed shell structure as described above, optionally, a circular hole is formed in the center of the node round steel, a bolt is arranged in the circular hole, and the end of the bolt is provided with a nut for pressing the pressing plate against the end face of the node round steel.
[0011] The self-locking device for non-welding of the latticed shell structure has the advantages that the latticed shell nodes are of the same size, the self-locking device is non-welding, and the construction period is saved; during construction, the nodes only need to be assembled, welding on site is avoided, the construction process is simplified, the efficiency is improved, and the safety is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0012] The disclosure of the present application will be more apparent with reference to the drawings. It should be understood that the drawings are only for the purpose of illustration, and are not intended to limit the scope of protection of the present application. In the drawings:
[0013] Fig. 1 is the overall structure schematic view of the self-locking device for non-welding of the latticed shell structure.
[0014] Fig. 2 is the structure schematic view of the latticed shell node.
[0015] Fig. 3 is the structure schematic view of the node round steel.
[0016] Fig. 4 is the structure schematic view of the latticed shell rod.
[0017] Reference signs: 1-latticed shell node; 1.1-node round steel; 1.2-groove; 1.3-pressing plate; 2-latticed shell rod; 2.1-rod body; 2.2-plug; 3-circular hole; 4-bolt. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0019] like Figs. 1 to 4 As shown, a typical embodiment of this utility model provides a self-locking device for non-welded reticulated shell structures, comprising: a reticulated shell node 1, which includes a node round steel 1.1, a groove 1.2, and a pressure plate 1.3. The node round steel 1.1 has a columnar structure. Multiple grooves 1.2 are equidistantly arranged on the circumferential surface of the node round steel 1.1, and at least one end of the groove 1.2 extends axially through the end face of the node round steel 1.1 to form an insertion port. The groove cavity size of the groove 1.2 is larger than its opening size. The pressure plate 1.3 is detachably installed on the end of the node round steel 1.1 corresponding to the insertion port for sealing the insertion port. A reticulated shell rod 2, which includes a rod body 2.1 and an insertion block 2.2. The insertion block 2.2 is disposed at both ends of the rod body 2.1. The insertion block 2.2 is configured to fit into the groove 1.2 and can be inserted into the groove 1.2 from the insertion port.
[0020] During the connection of the reticulated shell node 1, simply insert the insert block 2.2 on the reticulated shell member 2 into the groove 1.2 of the node circular plate. After all the reticulated shell members 2 on a reticulated shell node 1 are connected, the pressure plate 1.3 is connected to the node circular steel 1.1 to lock the reticulated shell member 2 onto the node circular steel 1.1. The entire process does not require frequent welding construction, achieving a non-welding self-locking connection.
[0021] The groove 1.2 and the insert 2.2 are both designed as semi-circular structures, the rod 2.1 is an I-beam, and both ends of the rod 2.1 are designed as tapered structures.
[0022] In a relatively specific embodiment, both ends of the groove 1.2 are formed with sockets, and two pressure plates 1.3 are provided. A circular hole 3 is opened in the center of the node round steel 1.1, a bolt 4 is inserted in the circular hole 3, and a nut is provided at the end of the bolt 4 for pressing the pressure plate 1.3 against the end face of the node round steel 1.1.
[0023] The node round steel 1.1 is made of 45# steel, and the size is a round steel of φ128x102. Six machined semicircular structures are uniformly distributed on the outside of the node round steel 1.1. The rod body 2.1 is made of Q235-B 16# I-beam. The end of the rod body 2.1 is made of Q355B. The plug 2.2 at both ends is processed into a size embedded in the semicircular structure of the node. The steel net shell adopts a Keweite plus Lianfang combined grid. In order to ensure the forming degree of the top plate, three top plate support points are provided for each rod body 2.1. The center of the φ128x102 round steel is a circular hole 3 with a radius of 20 mm. After the net shell component is installed on the upper and lower surfaces of the node round steel 1.1, a φ128x6 pressing plate 1.3 is used, and a M20x140 bolt 4 is tightened to complete the connection of the net shell node 1. After the net shell is assembled, its stability is analyzed to ensure that the overall performance meets the maximum load requirement.
[0024] The stability of the net shell is analyzed. According to the provisions of Section 4.3.3 of Technical Specification for Spatial Net Shell Structures (JGJ7-2010), the maximum calculated value of initial defects can be taken as 1 / 300 of the span of the net shell. In theory, the maximum value of the defect should use the maximum installation deviation allowed in construction. The determination of this value in the specification is mainly to consider that when the defect reaches about 1 / 300 of the span, its influence is fully reflected. When the maximum span of the project is 46000mm, the maximum calculated value of the initial defect is determined as 153.3mm according to the provisions of the specification. The initial defect distribution mode is determined according to the first order instability mode. Through the use of ANSYS large deformation nonlinear analysis results, it can be known that the overall instability load point of the net shell is 10966N. Therefore, the safety factor of the net shell stability is K=10966 / 14421=6.3>[4.2], so the overall stability of the structure meets the provisions of Section 4.3.4 of JGJ7-2010.
[0025] The non-welding self-locking device for net shell structure of the embodiment is mainly used for the node connection of large storage tanks and plant houses. Since there are many nodes, the design is quite complicated, and there is welding work in other designed nodes during installation, which affects the construction progress and increases the cost. The non-welding self-locking device for net shell structure of the embodiment is different from the previous connection nodes which are complex and complicated, and have large welding amount. The nodes of the embodiment all adopt the same design, which avoids the difficulty of calling corresponding nodes in a large number of node structures, and saves the construction cost.
[0026] In addition, the shell connection point adopts a non-welding self-locking device, the nodes of the shell are uniformly distributed in stress, the rigidity and deflection of the shell are met, in the construction process, only the shell rod 2 needs to be embedded in the shell node 1, after all the shell rods 2 of the node are installed, the pressure plate 1.3 and the bolt 4 are used to lock it, this node connection method avoids welding of the shell structure, reduces the construction cost and improves the construction efficiency. The non-welding self-locking device for the shell structure of the embodiment can also be used for setting the steel structure frame node and other pipe gallery structure construction matters.
[0027] For example, when a coal enterprise increases a 30000m³ naphtha storage tank and supporting facilities in the reserved position of the existing naphtha tank group in the tank area of the whole plant in the naphtha storage tank technical improvement project. The construction content is mainly the installation of the naphtha metal storage tank, a single naphtha metal storage tank with a diameter of 46 meters, a height of 19.35 meters, a weight of about 670 tons and a capacity of 30000m³, the specific content is the blanking, prefabrication and welding installation of the tank body bottom plate, wall plate, reinforcing ring, shell, skin, inner floating disc and disc ladder, a set of naphtha tail gas treatment facilities and supporting facilities, and the transformation of the cabinet room and the transformer substation.
[0028] The naphtha fire hazard category is Class A. At the storage temperature, the naphtha saturated vapor pressure is greater than 5.2kPaa and less than 72kPaa, according to the “Design Fireproof Standard for Petroleum and Chemical Industry” (2018 edition) GB50160-2008 and “Petroleum Chemical Industry Pollutant Discharge Standard” GB31571-2015 and other specifications, the newly added naphtha storage tank in the project adopts an inner floating roof tank + nitrogen sealing, storage at room temperature, and a primary sealing + secondary sealing device between the floating roof and the tank wall to reduce material volatilization loss. During the operation of the cracking device, the naphtha produced by the coal-to-oil device is continuously sent to the naphtha storage tank, and the naphtha is cut, stored and sampled and analyzed in the naphtha tank group before being pumped to the cracking device. During the maintenance of the cracking device, the train loading facilities of the coal-to-oil device and the highway loading facilities of the tank area automobile loading and unloading station are used to transport the naphtha out of the plant. The non-welding self-locking device for the shell structure of the embodiment can be applied to the shell construction of the newly added 30000m³ naphtha storage tank technical improvement project.
[0029] The technical scope of the utility model is not limited to the content in the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical thought of the utility model, and these modifications and changes should all belong to the range of the utility model.
Claims
1. A non-welded self-locking device for a latticed structure, characterized in that, The application relates to a latticed shell node and a latticed shell rod. The latticed shell node comprises a node round steel, grooves and a pressing plate, the node round steel is in a columnar structure, a plurality of grooves are equidistantly arranged on the circumferential surface of the node round steel, at least one end of the groove penetrates through the end surface of the node round steel along the axial direction to form a socket, the size of the groove cavity is larger than the size of the groove mouth, and the pressing plate is detachably arranged at the end of the node round steel corresponding to the socket to block the socket. The latticed shell rod comprises a rod body and an inserting block, the inserting block is arranged at both ends of the rod body, the inserting block is arranged to be matched with the groove, and the inserting block can be inserted into the groove from the socket.
2. A non-welded self-locking device for latticed structures according to claim 1, characterized in that, Both the groove and the inserting block are arranged in a semicircular structure.
3. A non-welded self-locking device for latticed structures according to claim 1 or 2, characterized in that, The rod body is an I-shaped steel, and both ends of the rod body are arranged in a conical structure.
4. A non-welded self-locking device for latticed structures according to claim 3, characterized in that, Both ends of the groove are formed with the socket, and the pressing plate is provided with two.
5. A non-welding self-locking device for latticed structures according to claim 1 or 4, characterized in that, A round hole is arranged in the center of the node round steel, a bolt is arranged in the round hole, and the end of the bolt is provided with a nut for pressing the pressing plate on the end surface of the node round steel.