Steel pipe top tray butt joint structure and application method thereof

Abstract

The invention relates to the technical field of steel pipe connection, and discloses a steel pipe top tray butt joint structure and an application method thereof.The steel pipe top tray butt joint structure comprises a pipe body, a pipe cavity is formed in the middle of the pipe body, top trays are fixedly connected to the two ends of the pipe body, a plurality of fixing holes are formed in the outer walls of the top trays, and first internal threads are arranged on the inner walls of the fixing holes; a first internal thread is arranged in the middle of the inner wall of the pipe body, a first groove is formed in the bottom end of the first internal thread, the first groove of the first internal thread is formed in the top end of the inner wall of the pipe body, a first sealing gasket is arranged in the first groove of the first internal thread, a second internal thread is arranged in the middle of the inner wall of the pipe body, and a second groove is formed in the bottom end of the second internal thread. Through the design that the pipe diameters are correspondingly matched with different first internal threads, second internal threads and third internal threads, the adaptability of pipeline connection is improved, the proper internal threads can be found for connection for steel pipes with different pipe diameter specifications, and leakage of fluid in pipe cavities is effectively prevented. The problem that the adaptability of pipeline connection is poor is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe connection, and specifically to a butt joint structure of a steel pipe top plate and its application method. Background Art

[0002] In many current engineering fields involving steel pipe connection, such as the petrochemical industry, its complex process flow requires the transportation of various fluid media with different chemical properties, temperature, and pressure requirements, including crude oil, various chemical raw materials and products, etc. In large-scale petroleum refining and chemical production plants, numerous pipelines crisscross to form a huge material transportation network. The same is true for the building water supply and drainage system. Whether it is a high-rise building or a large commercial complex, stable and reliable water supply and drainage pipelines are required to ensure the supply of domestic water and the effective discharge of sewage. The pipeline lengths involved are often thousands of meters, and they need to adapt to the pressure changes between different floors and complex building layouts. There is also the field of heat transfer. In urban central heating projects, hot water or steam needs to be transported from the heat source plant to each user end through pipelines over long distances. The pipelines need to maintain good transportation performance under different ambient temperature conditions to ensure efficient and stable heat transfer.

[0003] In these application scenarios, there are many problems to be solved in the traditional steel pipe butt joint method. In the past, when two steel pipes were butted, the top plates integrally formed at the ends needed to ensure that the inner diameters of the two steel pipes and the outer peripheral dimensions of the top plates were the same to achieve the connection of the inner cavities. This butt joint method with too strong one-to-one characteristics has poor adaptability. Incompatible steel pipes cannot be used, resulting in waste of resources and affecting the transportation efficiency of the entire pipeline system. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a butt joint structure of a steel pipe top plate and its application method, which solves the problem of poor adaptability of pipeline connection.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A butt joint structure of a steel pipe top plate and its application method, including a pipe body. A pipe cavity is provided in the middle of the pipe body. Top plates are fixedly connected to both ends of the pipe body. A number of fixing holes are provided on the outer wall of the top plates. Internal threads one are provided on the inner walls of the fixing holes. Grooves one are provided at the bottoms of the internal threads one. The grooves one of the internal threads one are arranged at the top ends of the inner walls of the pipe body. Sealing gaskets one are arranged in the grooves one of the internal threads one. Internal threads two are provided in the middle of the inner wall of the pipe body. Grooves two are provided at the bottoms of the internal threads two. Sealing gaskets two are arranged in the grooves two of the internal threads two. The grooves two of the internal threads two are arranged in the middle of the inner wall of the pipe body. Internal threads three are provided at the bottom end of the inner wall of the pipe body. Grooves three are provided at the bottoms of the internal threads three. Sealing gaskets three are arranged in the grooves three of the internal threads three. The grooves three of the internal threads three are arranged at the bottom end of the inner wall of the pipe body.

[0006] Preferably, the whole of the pipe body is in an hourglass shape. The narrow part in the middle of the pipeline of the pipe body is used to limit the fluid flow, and the pipeline of the pipe body is used to disperse stress.

[0007] Preferably, the whole of the top plate is in an annular shape. The top plate is used to distribute the connecting force and provide a supporting surface.

[0008] Preferably, the application method of the steel pipe top plate docking structure includes the following steps: S1. Preparation work: Confirm the pipe body to be connected, and prepare the corresponding top plate, gasket one, gasket two, gasket three and fixing bolt fittings. S2. Install the gaskets: Install gasket one, gasket two and gasket three to the corresponding positions of the top plate respectively. S3. Connect the steel pipe and the top plate: Screw the steel pipe into the corresponding internal thread one, internal thread two or internal thread three. S4. Connect multiple pipes: Connect multiple pipe bodies to the top plate through the fixing holes in sequence. S5. Inspection and debugging: Check whether the bolts at all connection parts are tightened, and check whether there is any leakage at the connection.

[0009] Preferably, the preparation method of the steel pipe top plate docking structure includes the following steps: S1. Pipe body preparation: Select the pipe material, process the pipe body with the required length, and ensure that the inner diameter of the pipe cavity and the end are flat. S2. Top plate preparation: Process the top plate by casting, forging or machining, reserve the fixing holes, and use the lathe equipment to process internal thread one, internal thread two and internal thread three, and ensure the thread accuracy and surface quality. S3. Gasket processing: Select rubber or silica gel elastic materials to make gasket one, gasket two and gasket three, and make their sizes match the corresponding installation positions of the top plate. S4. Component assembly: Install gasket one, gasket two and gasket three to the top plate, and assemble and weld the processed pipe body and the top plate. S5. Test the component: Simulate the working environment and test the component to ensure that there are no problems of loose connection and leakage during the operation of the component.

[0010] Preferably, the pipe body preparation in S1 includes the following steps: S101. According to the use scenario, medium characteristics and mechanical requirements, select the suitable pipe material. Ordinary carbon steel can be used for transporting water or general fluids. S102. Use cutting equipment to cut the pipe material according to the designed length to obtain the pipe body, and ensure that the cutting surface is flat. S103. Process the end of the pipe body to ensure that the inner diameter of the pipe cavity meets the standard, remove impurities, and chamfer if necessary.

[0011] Preferably, the preparation of the top plate in S2 includes the following steps: S201. Select suitable alloy steel and stainless steel materials according to the usage environment and performance requirements; S202. Make the top plate blank by casting, forging or machining, and reserve the fixing holes; S203. Use a lathe to machine the internal thread at the specified position and control the accuracy; S204. Measure the dimensional accuracy and detect internal defects by flaw detection to ensure the quality.

[0012] Preferably, the processing of the gasket in S3 includes the following steps: S301. Select fluororubber and silicone rubber as suitable materials according to the sealing requirements; S302. Design and manufacture a mold according to the installation and sealing requirements to ensure the accuracy; S303. Use molding or extrusion molding to form the material in the mold.

[0013] Preferably, the assembly of components in S4 includes the following steps: S401. Clean the components, check the fixing holes, threads and gaskets, and prepare the connecting parts; S402. Accurately install the gasket at the corresponding position of the top plate, thread-connect the pipe fitting to the internal thread of the top plate, and pass the bolt through the fixing hole to connect the pipe body and the top plate and tighten; S403. Connect multiple pipe bodies and top plates in sequence to ensure the communication of the pipe cavities.

[0014] Preferably, the testing of the assembly in S5 includes the following steps: S501. Check the connection of the assembly and the status of the components, and connect the calibrated testing equipment; S502. Slowly increase the pressure to the specified value, keep the pressure and observe for any abnormalities, and slowly decrease the pressure after the test; S503. Inject the test medium and use a detection device to check whether there is any leakage at each connection part.

[0015] The present invention provides a steel pipe top plate docking structure and its application method. It has the following beneficial effects: 1. Through the design of corresponding matching of different pipe diameters with the first internal thread, the second internal thread and the third internal thread, the adaptability of pipeline connection is greatly improved. For steel pipes with different pipe diameter specifications, a suitable internal thread can be found for connection. At the same time, gaskets at different positions can be closely attached during the corresponding connection process, effectively preventing the leakage of fluid in the pipe cavity. It solves the problem of poor adaptability of pipeline connection.

[0016] 2. When the tube body of the present invention bears external forces, the stress distribution at each part is more uniform, reducing the risk of damage such as rupture and deformation of the tube body due to excessive local stress, and improving the overall strength and stability of the tube body. The problem of easy damage of the pipeline during use is solved.

[0017] 3. The present invention ensures the stability of the connection through the support surface provided by the top plate. During the installation, operation, and subsequent maintenance of the pipeline system, each component can maintain an accurate relative position and a good connection state. The problem of unstable support connection is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front-side perspective schematic diagram of the present invention; Figure 2 is a bottom-side perspective schematic diagram of the present invention; Figure 3 is a top-view structural schematic diagram of the present invention; Figure 4 is a side-view structural schematic diagram of the present invention; Figure 5 is a partial mechanism cross-sectional view at the tube body of the present invention; Figure 6 is a partial structural cross-sectional view at the top plate of the present invention.

[0019] Wherein, 1. Tube body; 2. Top plate; 3. Fixed hole; 4. First internal thread; 5. Tube cavity; 6. Second internal thread; 7. Third internal thread; 8. First sealing gasket; 9. Second sealing gasket; 10. Third sealing gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to the attached Figure 1 - attached Figure 6, an embodiment of the present invention provides a butt joint structure for a steel pipe top plate and its application method, including a pipe body 1. A pipe cavity 5 is provided in the middle of the pipe body 1. Top plates 2 are fixedly connected to both ends of the pipe body 1. A number of fixing holes 3 are provided on the outer wall of the top plate 2. An internal thread one 4 is provided on the inner wall of the fixing hole 3. A groove one is provided at the bottom end of the internal thread one 4. The groove one of the internal thread one 4 is provided at the top end of the inner wall of the pipe body 1. A sealing gasket one 8 is provided in the groove one of the internal thread one 4. An internal thread two 6 is provided in the middle of the inner wall of the pipe body 1. A groove two is provided at the bottom end of the internal thread two 6. A sealing gasket two 9 is provided in the groove two of the internal thread two 6. The groove two of the internal thread two 6 is provided in the middle of the inner wall of the pipe body 1. An internal thread three 7 is provided at the bottom end of the inner wall of the pipe body 1. A groove three is provided at the bottom end of the internal thread three 7. A sealing gasket three 10 is provided in the groove three of the internal thread three 7. The groove three of the internal thread three 7 is provided at the bottom end of the inner wall of the pipe body 1.

[0022] Specifically, an internal thread one 4 is provided at the top end of the inner wall of the pipe body 1, with a groove one at its bottom end and a sealing gasket one 8 placed therein; an internal thread two 6, a corresponding groove two, and a sealing gasket two 9 are provided in the middle of the inner wall; an internal thread three 7, a groove three, and a sealing gasket three 10 are provided at the bottom end of the inner wall. When connecting steel pipes, the characteristics of different internal threads adapting to steel pipes of different diameters are utilized to achieve connection and sealing. For steel pipes with a larger diameter, they can be screwed into the position of the internal thread one 4. During the process of gradually screwing in and tightening the steel pipe, the end of the steel pipe will squeeze the sealing gasket one 8, causing it to undergo elastic deformation, thereby filling the tiny gap between the steel pipe and the top end of the inner wall of the pipe body 1. While achieving sealing, the firmness of the connection is ensured through the engagement between the threads. For steel pipes with a relatively smaller diameter, they can be screwed into the position of the internal thread three 7. Similarly, the sealing gasket three 10 plays a sealing role after being squeezed, and the tight connection is ensured by the cooperation between the internal thread three 7 and the external thread of the steel pipe. For steel pipes with a medium diameter, they can be selected to be screwed into the position of the internal thread two 6, and a reliable connection is completed through the sealing of the sealing gasket two 9 and its cooperation with the internal thread two 6. This method of selecting the corresponding internal thread for connection according to the diameter of the steel pipe fully considers the adaptation requirements of different diameters. Combined with the fixing holes 3 and the internal thread one 4 provided on the outer wall of the top plate 2, the stability of the entire butt joint structure is further strengthened, enabling each component to work together to form a stable and well-sealed connection system.

[0023] By designing the corresponding matching of the diameter of the steel pipe with different internal threads one 4, internal thread two 6, and internal thread three 7, the adaptability of pipeline connection is greatly improved. For steel pipes of different diameter specifications, a suitable internal thread can be found for connection. At the same time, the sealing gaskets at different positions can closely fit during the corresponding connection process, effectively preventing the leakage of fluid in the pipe cavity 4. The problem of poor adaptability of pipeline connection is solved.

[0024] Please refer to the appendix Figure 4, the overall shape of the pipe body 1 is hourglass-shaped. The narrow part in the middle of the pipeline of the pipe body 1 is used to restrict the fluid flow rate, and the pipeline of the pipe body 1 is used to disperse stress.

[0025] Specifically, the pipe body 1 is hourglass-shaped, and the cross-sectional area of the narrow part in the middle can restrict the fluid flow rate passing through the pipe body 1 per unit time. When an external force acts on the pipe body 1, according to the stress distribution principle, the force will be transmitted and distributed along the structure of the pipe body 1. The hourglass-shaped pipe body 1 has the characteristic of gradual change in shape. Compared with a straight cylindrical pipeline, the bent and diameter-changing parts can cause the stress to change direction and disperse during the transmission process. At the same time, the material of the pipe body 1 itself has certain elasticity and toughness, and will produce a certain amount of deformation under the action of stress. This deformation can consume a part of the stress energy, so that the stress is dispersed in the structure of the pipe body 1, avoiding stress concentration in a certain local area.

[0026] When the pipe body 1 bears an external force, the stress distribution in each part is more uniform, reducing the risk of damage such as rupture and deformation of the pipe body 1 due to excessive local stress, and improving the overall strength and stability of the pipe body 1. Solve the problem that the pipeline is easily damaged during use.

[0027] Please refer to the appendix Figure 1 - appendix Figure 6 , the overall shape of the top plate 2 is circular ring-shaped. The top plate 2 is used to distribute the connection force and provide a support surface.

[0028] Specifically, the annular plane of the top plate 2 constitutes a relatively flat and stable support surface. In the pipeline system, whether it is the docking of adjacent pipe bodies 1 or the connection between the pipe body 1 and other related equipment, the annular support surface of the top plate 2 can fully contact the connection surfaces of other components. Based on the principle that support force is generated by mutual contact between objects, the top plate 2, with its material having certain strength and stiffness, can provide stable and reliable support for the components connected to it, ensuring that the connection part remains stable in the vertical direction and other force directions, and preventing situations such as component displacement and connection loosening caused by insufficient support.

[0029] The stability of the connection is ensured by the support surface provided by the top plate 2. During the installation, operation, and subsequent maintenance of the pipeline system, the components can maintain accurate relative positions and good connection states. Solve the problem of unstable support connection.

[0030] Please refer to the appendix Figure 1 - appendix Figure 6 , the application method of the steel pipe top plate docking structure includes the following steps: S1. Preparation work: Confirm the pipe body 1 to be connected, and prepare the corresponding top plate 2, gasket one 8, gasket two 9, gasket three 10, and fixed bolt fittings; S2. Install the gaskets: Install gasket one 8, gasket two 9, and gasket three 10 to the corresponding positions on the top plate 2 respectively; S3. Connect the steel pipe to the top plate 2: Screw the steel pipe into the corresponding internal thread one 4, internal thread two 6, or internal thread three 7; S4. Connect multiple pipes: Connect multiple pipe bodies 1 to the top plate 2 through the fixing holes 3 in sequence; S5. Inspection and debugging: Check whether the bolts at all connection parts are tightened and whether there is any leakage at the connection.

[0031] Specifically, in the preparation work link, based on a clear understanding of the entire docking structure and the subsequent installation process planning, accurately confirm the specifications of the pipe body 1 to be connected and other situations, so as to prepare the appropriate top plate 2, gaskets, and fixing bolt fittings, laying the foundation for orderly installation. Then, when installing the gaskets, relying on the elastic deformation and filling characteristics of the gaskets, place gasket one 8, gasket two 9, and gasket three 10 at the corresponding positions on the top plate 2. When the steel pipe is screwed in later, it can be tightly filled into the connection gap through extrusion to achieve sealing. In the stage of connecting the steel pipe to the top plate 2, using the principle of screw transmission and cooperation of the thread, screw the steel pipe into the corresponding internal thread one 4, internal thread two 6, or internal thread three 7 according to the pipe diameter of the steel pipe. Through the thread engagement and the extrusion of the gasket, a firm connection is achieved and the sealing effect is enhanced. When connecting multiple pipes, relying on the design of the fixing holes 3 on the top plate 2 and the principle of bolt fastening, let multiple pipe bodies 1 pass through the fixing holes 3 with bolts and tighten them. Through the evenly distributed connection force transmitted by the top plate 2, a stable overall pipeline structure is constructed. Finally, in the inspection and debugging link, following the principles of mechanical fastening inspection and fluid sealing detection, check the tightening degree of the bolts and the leakage situation at the connection, ensure that all components are closely fitted and the structure is well-sealed, so as to ensure that the entire steel pipe and top plate 2 docking structure can operate reliably and meet the requirements of complex working conditions.

[0032] Please refer to the attached Figure 1 - attached Figure 6 For the preparation method of the steel pipe and top plate docking structure, it includes the following steps: S1. Prepare the pipe body 1: Select the pipe material and process the pipe body 1 with the required length, ensuring that the inner diameter of the pipe cavity 5 and the end are flat; S2. Prepare the top plate 2: Use casting, forging, or machining methods to process the top plate 2, reserve the fixing holes 3, and use lathe equipment to process the internal thread one 4, internal thread two 6, and internal thread three 7, ensuring the thread accuracy and surface quality; S3. Process the gaskets: Select rubber and silicone elastic materials to make gasket one 8, gasket two 9, and gasket three 10, making their sizes match the corresponding installation positions on the top plate 2; S4. Assemble the components: Install gasket one 8, gasket two 9, and gasket three 10 to the top plate 2, and assemble and weld the processed pipe body 1 to the top plate 2; S5. The test component simulates the working environment to test the component, ensuring that there are no problems with loose connections and leaks during operation.

[0033] The preparation of the pipe body 1 in S1 includes the following steps: S101. Select a suitable pipe material according to the usage scenario, medium characteristics, and mechanical requirements. Ordinary carbon steel can be used for conveying water or general fluids. S102. Cut the pipe material to the designed length with a cutting device to obtain the pipe body 1, ensuring that the cutting surface is flat. S103. Process the end of the pipe body 1 to ensure that the inner diameter of the pipe cavity 5 meets the standard, remove impurities, and chamfer if necessary.

[0034] Specifically, for the preparatory work, select suitable components according to the planning of the structure and installation process. Install the gasket, and rely on the elastic deformation of the gasket to fill the seal. The connection between the steel pipe and the top plate 2 uses screw drive for cooperation. The multi-pipe connection realizes the transmission and distribution of force through the fixing holes 3 and bolts. For inspection and debugging, control the quality according to the principles of mechanics and seal detection. Each step in the preparation of the pipe body 1 is based on material adaptation, the function of cutting equipment, machining technology, etc. to ensure the quality of the pipe body 1. These principles work together to ensure the reliable operation of the entire docking structure.

[0035] The preparation of the top plate 2 in S2 includes the following steps: S201. Select suitable materials of alloy steel and stainless steel according to the usage environment and performance requirements. S202. Make the blank of the top plate 2 through casting, forging, or machining, and reserve the fixing holes 3. S203. Use a lathe to machine the internal thread at the specified position and control the precision. S204. Measure the dimensional accuracy and detect internal defects by flaw detection to ensure the quality.

[0036] Specifically, first in step S201, select suitable materials according to the usage environment and performance requirements, referring to the corrosion resistance, strength, etc. characteristics of alloy steel and stainless steel. In S202, casting relies on the solidification of liquid metal in the mold, forging makes the solid metal billet plastically deformed by external force, and machining uses cutting tools to cut materials, and the fixing holes 3 are reserved during the process. In S203, use a lathe, based on the principle of helical motion, to accurately control the parameters to machine the internal thread at the specified position. In the S204 step, use measuring tools such as calipers and micrometers to control the dimensional accuracy according to the length measurement principle, and use flaw detection methods such as ultrasonic, ray, and magnetic particle flaw detection to detect internal defects according to their respective principles, ensuring that the top plate 2 meets the quality requirements and laying the foundation for subsequent use.

[0037] The processing of the gasket in S3 includes the following steps: S301. Select fluororubber and silicone rubber as suitable materials according to the sealing requirements. S302. Design and manufacture the mold according to the installation and sealing requirements to ensure accuracy; S303. Use compression molding or extrusion molding to form the material in the mold.

[0038] Specifically, in the gasket processing, in S301, materials are selected according to the sealing requirements under different working conditions. Fluororubber is suitable for harsh environments such as the chemical industry due to its characteristics of high temperature resistance, oil resistance, and chemical corrosion resistance; silicone rubber meets the requirements of industries such as food and medicine by virtue of its high and low temperature resistance and physiological inertness. In S302, the mold is designed and manufactured according to the installation and sealing requirements. Based on the installation adaptability of the gasket, the mold is precisely manufactured using machining processes to ensure the accuracy of each part and good assembly, preparing for molding. In S303, compression molding relies on the pressure transmission of the pressing equipment to make the rubber react and form in the mold at high temperature through vulcanization, etc.; extrusion molding uses the rotation and conveying extrusion of the screw to shape the rubber material at the die orifice. By accurately regulating parameters such as pressure, temperature, and time in each link, gaskets that meet the sealing requirements and dimensional accuracy are ensured to be produced.

[0039] In S4, the component assembly includes the following steps: S401. Clean the components, check the fixing holes 3, threads, and gaskets, and prepare the connecting parts; S402. Accurately install the gasket at the corresponding position of the top plate 2, thread-connect the pipe fitting with the internal thread of the top plate 2, and pass the bolt through the fixing hole 3 to connect the pipe body 1 and the top plate 2 and tighten; S403. Connect multiple pipe bodies 1 and top plates 2 in sequence to ensure that the pipe cavity 5 is connected.

[0040] Specifically, in S401, by cleaning the components, checking each key part, and preparing the connecting parts, impurities are removed, the component structure is ensured to be intact and matched, laying the foundation for assembly. In S402, the installation of the gasket relies on its elastic deformation and fitting characteristics. After being placed in place, it can fill the gap under stress to achieve sealing; the thread connection uses the principle of screw drive cooperation to screw the pipe fitting into the internal thread of the top plate 2 to achieve a stable connection; the bolt connection uses the principle of axial tension turning into clamping force to tighten the bolt to make the pipe body 1 and the top plate 2 fit tightly. In S403, multiple pipe bodies 1 and top plates 2 are connected in sequence. Based on the pipeline design and fluid transportation principle, the connection sequence is reasonably arranged to ensure that the pipe cavity 4 is connected, enabling the fluid to flow smoothly in the entire pipeline system along the established path and ensuring the normal operation of the pipeline system.

[0041] In S5, the component testing includes the following steps: S501. Check the connection of the components and the status of the parts, and connect the calibrated test equipment; S502. Slowly increase the pressure to the specified value, keep the pressure and observe for any abnormalities, and slowly decrease the pressure after the test; S503. Inject the test medium and use the detection device to check whether there is leakage at each connection part.

[0042] Specifically, in S501, when checking the component connection and part status, it is based on the principles related to mechanics and sealing. The connection stability and part integrity are inspected. The adaptation and calibration of the test equipment are correctly connected according to the function matching principle to ensure the accuracy of the test data. In the S502 step, the pressure is slowly increased according to the principle of gradual change of fluid and structure under stress, allowing the structure to adapt to the pressure. The pressure is maintained to observe and check for potential problems based on pressure balance to see if there are any abnormalities. The pressure is slowly decreased according to the principle of uniform pressure release to avoid impact on the structure. In S503, the test medium is injected to simulate the actual working conditions using its fluidity to prepare for the detection. Leakage detection uses the working principle of the detection device. For example, a gas detector relies on capturing changes in gas concentration, and liquid detection uses visual inspection or special equipment to detect abnormal flow, etc., to judge the sealing condition of the connection part.

[0043] Working principle: In terms of structural design, the pipe body is in an hourglass shape. Using the principle of the relationship between cross-sectional area and flow velocity in fluid mechanics, the fluid flow rate is restricted through the narrow middle part. At the same time, according to the stress dispersion principle, when the pipe body is subjected to external forces, the stress is evenly dispersed to ensure the structural stability. The top plate is circular ring-shaped. Based on the law of uniform force distribution, the connection force is dispersed and transmitted, and with the flat circular ring surface, it provides a stable support to prevent the displacement of the components.

[0044] In the preparation process of each component, when preparing the pipe body, first select the suitable pipe material according to the usage scenario, medium characteristics, etc., and ensure durability based on the material property matching. Cutting the pipe ensures precise dimensions and a flat cutting surface by the mechanical action of the cutting equipment. Processing the end uses processes such as cutting to make the inner diameter of the pipe cavity meet the standards, remove impurities, and chamfer as required. In the preparation of the top plate, the material is selected considering the working conditions, such as alloy steel or stainless steel. The blank is made according to the corresponding forming principles by casting, forging, and machining, and fixing holes are reserved. The internal thread is machined on the lathe according to the principle of helical motion. Finally, measurement and flaw detection means are used to ensure the quality. The sealing gasket is processed by selecting fluororubber or silicone rubber according to the sealing requirements, designing the mold according to the installation requirements to ensure the accuracy, and using molding or extrusion to make the material form in the mold according to the principles of pressure and shaping.

[0045] In terms of the application method, the preparatory work is to prepare the suitable components according to the plan. Installing the sealing gasket uses its elastic deformation to fill the seal. The connection between the steel pipe and the top plate is achieved by thread fitting to ensure firmness and sealing. The connection of multiple pipes evenly distributes the force through the cooperation of bolts and fixing holes. The inspection and debugging control the quality according to the principles of mechanics and sealing detection. When testing the components, after checking the components and connections, the adaptation equipment is connected. The pressure is slowly increased, maintained, and decreased according to the law of pressure change, the medium is injected, and the leakage is checked by means of the detection device to comprehensively ensure the reliable operation of the structure.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Steel pipe top plate butt joint structure and its application method, including a pipe body (1), characterized in that: A lumen (5) is provided in the middle of the pipe body (1). The two ends of the pipe body (1) are fixedly connected with top plates (2). A number of fixing holes (3) are provided on the outer wall of the top plates (2). An internal thread one (4) is provided on the inner wall of the fixing holes (3). A groove one is provided at the bottom end of the internal thread one (4). The groove one of the internal thread one (4) is arranged at the top end of the inner wall of the pipe body (1). A sealing gasket one (8) is arranged in the groove one of the internal thread one (4). An internal thread two (6) is provided in the middle of the inner wall of the pipe body (1). A groove two is provided at the bottom end of the internal thread two (6). A sealing gasket two (9) is arranged in the groove two of the internal thread two (6). The groove two of the internal thread two (6) is arranged in the middle of the inner wall of the pipe body (1). An internal thread three (7) is provided at the bottom end of the inner wall of the pipe body (1). A groove three is provided at the bottom end of the internal thread three (7). A sealing gasket three (10) is arranged in the groove three of the internal thread three (7). The groove three of the internal thread three (7) is arranged at the bottom end of the inner wall of the pipe body (1).

2. The steel pipe top plate butt joint structure and its application method according to claim 1, characterized in that: The overall shape of the pipe body (1) is hourglass-shaped. The narrow part in the middle of the pipeline of the pipe body (1) is used to limit the fluid flow rate, and the pipeline of the pipe body (1) is used to disperse stress.

3. The steel pipe top plate butt joint structure and its application method according to claim 1, characterized in that: The overall shape of the top plate (2) is circular ring-shaped. The top plate (2) is used to distribute the connection force and provide a supporting surface.

4. The application method of the steel pipe top plate butt joint structure according to any one of claims 1-3, characterized in that, Including the following steps: S1. Preparation work: Confirm the pipe body (1) to be connected, and prepare the corresponding top plate (2), sealing gasket one (8), sealing gasket two (9), sealing gasket three (10) and fixing bolt fittings. S2. Install the sealing gasket: Install the sealing gasket one (8), sealing gasket two (9) and sealing gasket three (10) to the corresponding positions of the top plate (2) respectively. S3. Connect the steel pipe with the top plate (2): Screw the steel pipe into the corresponding internal thread one (4), internal thread two (6) or internal thread three (7). S4. Connect multiple pipes: Connect multiple pipe bodies (1) with the top plate (2) through the fixing holes (3) in sequence. S5. Inspection and debugging: Check whether the bolts at all connection parts are tightened, and check whether there is any leakage at the connection parts.

5. The preparation method of the steel pipe top plate butt joint structure according to any one of claims 1-3, characterized in that, Including the following steps: S1. Preparation of the pipe body (1): Select the pipe material, process the pipe body (1) with the required length, and ensure that the inner diameter of the lumen (5) and the end are flat. S2. Preparation of the top plate (2): Use casting, forging or machining methods to process the top plate (2), reserve the fixing holes (3), and use lathe equipment to process the internal thread one (4), internal thread two (6) and internal thread three (7), and ensure the thread accuracy and surface quality. S3. Processing of the sealing gasket: Select rubber and silicone elastic materials to make the sealing gasket one (8), sealing gasket two (9) and sealing gasket three (10), and make their sizes match the corresponding installation positions of the top plate (2). S4. Assembly of components: Install the sealing gasket one (8), sealing gasket two (9) and sealing gasket three (10) on the top plate (2), and assemble and weld the processed pipe body (1) with the top plate (2). S5. The test component simulates the working environment to test the component, ensuring that there are no problems with loose connections and leaks during operation.

6. The steel pipe top plate butt joint structure and its application method according to claim 5, characterized in that, The preparation of the pipe body (1) in S1 includes the following steps: S101. Select a suitable pipe material according to the usage scenario, medium characteristics, and mechanical requirements. Ordinary carbon steel can be used for conveying water or general fluids. S102. Use cutting equipment to cut the pipe material to the designed length to obtain the pipe body (1), ensuring that the cutting surface is flat. S103. Process the end of the pipe body (1) to ensure that the inner diameter of the pipe cavity (5) meets the standard, remove impurities, and chamfer if necessary.

7. The steel pipe top plate docking structure and its application method according to claim 5, characterized in that, The preparation of the top plate (2) in S2 includes the following steps: S201. Select suitable alloy steel and stainless steel materials according to the usage environment and performance requirements. S202. Use casting, forging, or machining to make the blank of the top plate (2), leaving the fixing holes (3). S203. Use a lathe to machine the internal thread at the specified position and control the precision. S204. Measure the dimensional accuracy and detect internal defects by flaw detection to ensure the quality.

8. The butt joint structure of the steel pipe top plate and its application method according to claim 5, characterized in that, The processing of the gasket in S3 includes the following steps: S301. Select fluororubber or silicone rubber as the suitable material according to the sealing requirements. S302. Design and manufacture a mold according to the installation and sealing requirements to ensure the precision. S303. Use compression molding or extrusion molding to form the material in the mold.

9. The steel pipe top plate butt joint structure and its application method according to claim 5, characterized in that, The assembly of the components in S4 includes the following steps: S401. Clean the components, check the fixing holes (3), threads, and gaskets, and prepare the connecting parts. S402. Accurately install the gasket at the corresponding position on the top plate (2), thread-connect the pipe fitting to the internal thread of the top plate (2), and pass the bolt through the fixing hole (3) to connect the pipe body (1) and the top plate (2) and tighten. S403. Connect multiple pipe bodies (1) and top plates (2) in sequence to ensure that the pipe cavities (5) are connected.

10. The steel pipe top plate butt joint structure and its application method according to claim 5, characterized in that, The test of the component in S5 includes the following steps: S501. Check the connection of the component and the status of the parts, and connect the calibrated test equipment. S502. Slowly increase the pressure to the specified value, keep the pressure and observe for any abnormalities, and then slowly decrease the pressure after the test. S503. Inject the test medium and use a detection device to check for leaks at each connection part.

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