Finish rolling forming anti-explosion steel pipe

Abstract

The invention relates to the technical field of steel pipes, and discloses a finish rolling forming anti-explosion steel pipe which comprises a bent pipe and a flow dividing module. The bent section of the bent pipe is connected with an anti-explosion ball, and two ends are connected with straight pipes; the explosion-proof ball is connected with a buffering module, the buffering module comprises an air cavity, a water storage cavity and a piston part, the piston part is matched with the air cavity and the water storage cavity, the flow dividing module is connected with the buffering module and a straight pipe below the bent pipe, and during explosion, air enters the buffering module to push the piston part to move upwards. Explosion shock waves are buffered multiple times through the anti-explosion ball, the buffering module and the flow dividing module, stress concentration at the joint of the bent pipe is relieved, the damage resistance is improved, the smearing piece and the glue supply piece are arranged, the problem that a rubber ring is aged and leaks due to high temperature is solved, and the sealing performance is enhanced; the material performance and the glue performance at the joint are protected through water spraying cooling, the sealing performance and the structural stability are guaranteed, and the problems of deformation and stress concentration aggravation caused by high temperature are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipes, and in particular to a precision-rolled explosion-proof steel pipe. Background Art

[0002] In some special industrial fields, such as petroleum, chemical industry, and natural gas, explosion-proof steel pipes are needed to ensure safety. In these fields, there are flammable and explosive gases or dusts. Once an explosion occurs, ordinary steel pipes may rupture due to the inability to withstand the huge pressure, thus causing more serious safety accidents. The production of precision-rolled explosion-proof steel pipes usually includes processes such as tube heating, perforation, tube rolling, and sizing. The precision rolling process can make the steel pipes more accurate in size and have better surface quality, thereby improving their overall performance. After searching, the Chinese patent with the announcement number CN213954574U discloses an explosion-proof steel pipe for petrochemical pipelines, including a pipe body, which is characterized in that a stainless steel pipe is sheathed on the outside of the pipe body, the inner diameter of the stainless steel pipe is larger than the outer diameter of the pipe body, spring columns are evenly distributed between the inner wall of the stainless steel pipe and the outer wall of the pipe body, and the space between the stainless steel pipe and the pipe body is filled with thermal insulation cotton, and the inner wall of the pipe body is covered with an anti-corrosion layer; the above technical solution mainly improves the pressure resistance of the entire pipe body by evenly distributing spring columns between the inner wall of the stainless steel pipe and the outer wall of the pipe body, and forming an explosion-proof layer using the stainless steel pipe and the spring columns. However, the above solution still has shortcomings: In the transportation of oil and natural gas, explosion-proof steel pipes need to be arranged. For some locations with height differences, elbows are needed to connect two explosion-proof pipes. When explosive and flammable gases appear in the explosion-proof pipes, although the explosion-proof pipes themselves can withstand the impact of the explosion due to their unique structural strength, the elbow joints are often unable to withstand such severe impacts. Under the action of the explosion shock wave, the stress concentration phenomenon at the joints is more obvious, and the stress level in the local area is much higher than that in the straight pipe section, which can easily lead to yielding or even fracture of the material. In addition, the stiffness of the elbow joints is relatively weak, and they are more likely to deform under the action of the explosion impact force. This deformation will further aggravate the stress concentration phenomenon, forming a vicious cycle, and ultimately leading to damage to the joints.

[0003] In order to solve the above problems, this application proposes a precision-rolled explosion-proof steel pipe. Summary of the Invention

[0004] The present invention proposes a precision-rolled explosion-proof steel pipe, which solves the problem in related technologies that in the arrangement of explosion-proof steel pipes for oil and natural gas transportation with height differences, the bend joints are easily susceptible to stress concentration and weak rigidity due to the explosion shock wave, and deformation further aggravates the stress concentration, forming a vicious cycle and ultimately leading to destruction.

[0005] The present invention provides a precision-rolled explosion-proof steel pipe, comprising a bend pipe and a diversion module; The curved section of the curved pipe is connected to an explosion-proof ball, and both ends are connected to straight pipes; The explosion-proof ball is connected to a buffer module, which includes an air chamber, a water storage chamber, and a piston. The piston cooperates with the air chamber and the water storage chamber. The diversion module is connected to the buffer module and the straight pipe below the elbow respectively. When an explosion occurs, the gas enters the buffer module and pushes the piston upward. After being buffered by the diversion module, it enters the straight pipe below the elbow. The connection between the curved pipe and the straight pipe is provided with a smearing piece, and a glue supplying piece is connected between the buffer module and the smearing piece. When the piston moves upward, the gas in the air cavity is transported to the glue supplying piece, so that the glue enters the smearing piece and is smeared on the connection between the curved pipe and the straight pipe; The smearing member is sleeved with a water spraying member connected with the water storage chamber. When the piston member moves upward, the water source in the water storage chamber is transported to the water spraying member and sprayed on the connection.

[0006] As a further optimization scheme of the present invention, the buffer module also includes a buffer cylinder, which is installed on the explosion-proof ball. A separation disk is installed in the buffer cylinder. The air cavity and the water storage cavity are both arranged in the buffer cylinder and separated by the separation disk, so that the glue part is connected to the air cavity. The bottom of the buffer cylinder is provided with openings respectively connected to the explosion-proof ball and the air cavity. The piston part is installed on the separation disk, and its two ends are respectively located in the air cavity and the water storage cavity, and the bottom end of the piston part is sealed in the opening. The buffer cylinder is connected with a one-way air inlet valve and a one-way air outlet valve connected to the air cavity.

[0007] As a further optimization scheme of the present invention, the piston member includes a shaft rod, which slides through the middle of the separation plate, and a first piston and a second piston are fixed at both ends of the shaft rod, respectively. The first piston is sealed in the opening at the bottom of the air cavity, and the second piston is located in the water storage cavity. A first spring is sleeved on the shaft rod, and the two ends of the first spring are respectively connected to the separation plate and the first piston.

[0008] As a further optimization scheme of the present invention, the diversion module includes a spherical buffer, a first diversion tube and a second diversion tube. The first diversion tube is connected to the bottom of the buffer cylinder and is opposite to the first piston. When the first piston moves upward, the gas enters the first diversion tube. The second diversion tube is connected to the straight tube below the bent pipe. The spherical buffer is connected between the first diversion tube and the second diversion tube. A one-way valve is installed on the second diversion tube.

[0009] As a further optimization scheme of the present invention, the spherical buffer component includes a buffer ball, which is connected between the first diversion tube and the second diversion tube. A rotating rod is rotatably installed in the buffer ball, a stainless steel blade is fixed on the rotating rod, and a torsion spring is sleeved on the rotating rod, and the two ends of the torsion spring are respectively connected to the end of the stainless steel blade and the inner wall of the buffer ball.

[0010] As a further optimization solution of the present invention, the smearing piece includes an annular smearing tube, which is sleeved on the connection between the curved pipe and the straight pipe, and is connected to the glue supply piece. The inner wall of the annular smearing tube is provided with multiple smearing holes.

[0011] As a further optimization scheme of the present invention, the glue supply part includes a glue cylinder, a first conduit, a second conduit and an elastic push piece. The first conduit is connected to the buffer cylinder, and the first conduit is connected to the upper part of the air cavity. The second conduit is connected to the annular smear tube. The glue cylinder is connected between the first conduit and the second conduit. The elastic push piece is installed in the glue cylinder. A sealing film is provided at one end of the second conduit close to the glue cylinder. The glue is provided between the elastic push piece and the sealing film. When the gas enters the glue cylinder, it pushes the elastic push piece to pierce the sealing film and push the glue into the second conduit.

[0012] As a further optimization scheme of the present invention, the elastic push piece includes a second spring and a third piston arranged in the glue tube, one end of the second spring is connected to the inner wall of one end of the glue tube close to the first tube, and the third piston is installed at the end of the second spring. The third piston is equipped with a needle rod arranged toward the sealing membrane.

[0013] As a further optimization scheme of the present invention, the water spray part includes an annular water spray pipe, a connecting pipe and a water guide pipe. A plurality of circumferentially arranged connecting pipes are fixed on the annular applicator pipe. The annular water spray pipe is sleeved on the plurality of connecting pipes and connected with them. The water guide pipe is connected between the annular water spray pipe and the buffer cylinder, and the water guide pipe is connected to the water storage chamber. A water spray hole is opened on the connecting pipe.

[0014] As a further optimization solution of the present invention, a plurality of water spray holes are provided, which are evenly distributed along the outer circumference of the connecting pipe so that the water source is sprayed in a range.

[0015] The above technical solution of the present invention has the following beneficial technical effects: 1. When an explosion occurs in the straight pipe at one end of the elbow, the gas shock wave is first buffered by the explosion-proof ball in the curved section of the elbow. Part of the gas enters the straight pipe below the explosion-proof ball, and part of it pushes the piston in the buffer module upward to achieve secondary buffering. The shock wave gas then enters the diversion module for a third buffering, and finally merges with the gas in the straight pipe below. This design provides multiple buffering, reduces the direct impact of the explosion shock wave on the elbow connection, alleviates stress concentration, avoids material yield fracture, reduces deformation, prevents a vicious cycle, and improves the damage resistance of the connection; 2. To ensure tightness, a rubber ring is installed at the connection between the elbow and the straight pipe. However, during an explosion, the high temperature generated will cause the rubber ring to age rapidly, resulting in leakage. Therefore, a smear piece is installed at the connection. During an explosion, the shock wave gas pushes the piston piece upward, transporting the air cavity gas to the glue supply piece. Under the action of pressure, the glue supply piece pushes the glue to the smear piece and smears it around the outer periphery of the connection. This design solves the problem of rubber ring aging and leakage caused by high temperature, enhances the sealing of the connection, and prevents more serious safety accidents. 3. When the piston member of the present invention moves upward, it can also transport the water source in the water storage chamber to the water spray member mounted on the smear member, and spray cold water to the connection between the curved pipe and the straight pipe through the water spray member, effectively reducing the temperature of the connection caused by high temperature during explosion, avoiding further damage to the material properties of the connection caused by high temperature, and at the same time helping to protect the performance of the smeared glue, further ensuring the sealing and structural stability of the connection, and reducing the problems of deformation and stress concentration caused by high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a precision-rolled explosion-proof steel pipe proposed by the present invention; Figure 2 This is a front view of a precision-rolled explosion-proof steel pipe proposed by the present invention; Figure 3 This is a schematic diagram of the back structure of a precision-rolled explosion-proof steel pipe proposed by the present invention; Figure 4 This is a schematic structural diagram of the buffer module of the present invention; Figure 5 This is a planar structural diagram of the buffer module of the present invention; Figure 6 Schematic diagram of the structure of the piston member of the present invention; Figure 7 This is a structural diagram of the glue supply component of the present invention; Figure 8 For the present invention Figure 7 A magnified view of middle A; Figure 9 Schematic diagram of the coordination structure of the smearing member and the water spraying member of the present invention; Figure 10 For the present invention Figure 9 Enlarged view of middle B; Figure 11 Schematic diagram of the structure of the diversion module of the present invention; Figure 12 It is a structural schematic diagram of the spherical buffer component of the present invention.

[0017] Figure numerals: 1, elbow; 101, explosion-proof ball; 102, straight pipe; 2, buffer module; 21, buffer cylinder; 201, one-way air inlet valve; 202, one-way air outlet valve; 211, separation plate; 212, air cavity; 213, water storage cavity; 22, piston; 221, shaft; 222, first piston; 223, second piston; 224, first spring; 3, smearing part; 31, annular smearing tube; 32, smearing hole; 4, glue supply part; 41, glue cylinder; 42, first Conduit; 43. Second conduit; 431. Sealing membrane; 44. Elastic push piece; 441. Second spring; 442. Third piston; 443. Needle rod; 5. Water spraying piece; 51. Annular water spraying pipe; 52. Connecting pipe; 521. Water spraying hole; 53. Water guide pipe; 6. Diversion module; 61. Spherical buffer; 611. Buffer ball; 612. Rotating rod; 613. Stainless steel blade; 614. Torsion spring; 62. First diversion pipe; 63. Second diversion pipe; 631. One-way valve. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0019] like Figures 1 to 12 As shown, the present invention proposes a precision-rolled explosion-proof steel pipe, comprising a bend pipe 1 and a diversion module 6; The curved section of the curved pipe 1 is connected to an explosion-proof ball 101, and both ends are connected to straight pipes 102; The explosion-proof ball 101 is connected to a buffer module 2, which includes an air chamber 212, a water storage chamber 213, and a piston member 22. The piston member 22 cooperates with the air chamber 212 and the water storage chamber 213. The diverter module 6 is connected to the buffer module 2 and the straight pipe 102 below the elbow 1 respectively. During an explosion, gas enters the buffer module 2, pushing the piston member 22 upward. After being buffered by the diverter module 6, it enters the straight pipe 102 below the elbow 1. The connection between the elbow 1 and the straight pipe 102 is covered with a smearing member 3, and a glue supplying member 4 is connected between the buffer module 2 and the smearing member 3. When the piston member 22 moves upward, the gas in the air cavity 212 is transported to the glue supplying member 4, so that the glue enters the smearing member 3 and is applied to the connection of the elbow 1; The smearing member 3 is provided with a water spraying member 5 connected with the water storage chamber 213. When the piston member 22 moves upward, the water in the water storage chamber 213 is transported to the water spraying member 5 and sprayed on the connection.

[0020] When an explosion occurs, the generated gas first impacts the curved section of the elbow 1. The explosion-proof ball 101 will initially block and buffer the gas, reducing the direct impact of the gas on the curved section of the elbow 1. Part of the gas enters the straight pipe 102 below it through the elbow 1, and the other part of the gas enters the buffer module 2, pushing the piston 22 to move upward. During the upward movement of the piston 22, it will play a certain blocking and buffering role on the gas entering the buffer module 2, reducing the impact force of the gas. Subsequently, the buffered gas enters the diversion module 6, which further disperses and buffers the gas, and then introduces the gas into the straight pipe 102 below the elbow 1 to prevent excessive accumulation of gas in the elbow 1 and the generation of excessive pressure; At the same time, when the piston 22 moves upward, it squeezes the gas in the air cavity 212 into the glue supply part 4. Under the action of the gas pressure, the glue supply part 4 transports the glue to the smearing part 3. The smearing part 3 evenly smears the glue on the connection between the curved pipe 1 and the straight pipe 102, thereby enhancing the sealing and firmness of the connection and preventing gas leakage from the connection. In addition, the upward movement of the piston member 22 will also cause the water source in the water storage chamber 213 to flow to the water spray member 5, and the water spray member 5 will spray water on the connection between the curved pipe 1 and the straight pipe 102, thereby reducing the high temperature generated by the explosion at the connection, avoiding damage to the material at the connection caused by the high temperature, and also cooling and protecting the glue to ensure the sealing performance of the glue.

[0021] like Figure 4 and Figure 5 As shown, in this embodiment, the buffer module 2 also includes a buffer cylinder 21, which is mounted on the explosion-proof ball 101. A separator 211 is installed in the buffer cylinder 21. The air cavity 212 and the water storage cavity 213 are both arranged in the buffer cylinder 21 and separated by the separator 211, so that the glue member 4 is connected to the air cavity 212. The bottom of the buffer cylinder 21 is provided with openings respectively connected to the explosion-proof ball 101 and the air cavity 212. The piston member 22 is mounted on the separator 211, and its two ends are respectively located in the air cavity 212 and the water storage cavity 213, and the bottom end of the piston member 22 is sealed in the opening. The buffer cylinder 21 is connected to a one-way air inlet valve 201 and a one-way air outlet valve 202 connected to the air cavity 212. When the explosive gas enters the buffer cylinder 21, the gas in the air cavity 212 is squeezed, and the glue supply part 4 provides power for the delivery of glue. The one-way air inlet valve 201 allows external gas to enter the air cavity 212 for replenishment, ensuring that there is sufficient gas supply in the air cavity 212. The one-way air outlet valve 202 can control the discharge direction of the gas in the air cavity 212, and is used to exhaust when the piston part 22 recovers, ensuring that the gas can only flow to the glue supply part 4, thereby providing stable pressure for the glue delivery. The opening at the bottom of the buffer cylinder 21 allows the explosive gas to enter the air cavity 212 and push the piston part 22 to move, realizing the functions of buffering and power transmission.

[0022] like Figure 5 and Figure 6 As shown, in this embodiment, the piston member 22 includes a shaft rod 221, which slides through the middle of the separation plate 211, and a first piston 222 and a second piston 223 are fixed to both ends of the shaft rod 221. The first piston 222 is sealed in the opening at the bottom of the air cavity 212, and the second piston 223 is located in the water storage cavity 213. A first spring 224 is sleeved on the shaft rod 221, and the two ends of the first spring 224 are respectively connected to the separation plate 211 and the first piston 222; When the explosion gas enters the air cavity 212, the gas pushes the first piston 222 to move upward, and the shaft 221 drives the second piston 223 to move upward. The first piston 222 is blocked in the opening at the bottom of the air cavity 212, which can effectively block the direct impact of the gas and play a buffering role. At the same time, the gas in the air cavity 212 is compressed during the movement to provide power for the glue supply part 4. The second piston 223 moves in the water storage chamber 213, squeezing the water in the water storage chamber 213 so that the water can flow smoothly into the water spraying part 5, and when the first piston 222 moves upward, the first spring 224 is compressed to store elastic potential energy. When the explosion impact force weakens, the elastic potential energy of the first spring 224 is released, pushing the first piston 222 to reset so that it can work next time, thereby improving the reusability of the buffer module 2.

[0023] like Figure 3 and Figure 11 As shown, in this embodiment, the diversion module 6 includes a spherical buffer 61, a first diversion tube 62 and a second diversion tube 63. The first diversion tube 62 is connected to the bottom of the buffer cylinder 21 and is directly opposite to the first piston 222. When the first piston 222 moves upward, gas enters the first diversion tube 62. The second diversion tube 63 is connected to the straight pipe 102 below the elbow 1. The spherical buffer 61 is connected between the first diversion tube 62 and the second diversion tube 63. A one-way valve 631 is installed on the second diversion tube 63. When the first piston 222 moves upward, the gas in the air cavity 212 can smoothly enter the first diverter pipe 62, and enter the spherical buffer 61 through the first diverter pipe 62, which buffers and decelerates the passing gas and reduces the impact force of the gas. The second diverter pipe 63 transports the buffered gas to the straight pipe 102 below the bend pipe 1. The one-way valve 631 is installed on the second diverter pipe 63, which can prevent the gas from flowing back and ensure that the gas can only flow in one direction, avoiding additional pressure shock caused by gas backflow, and ensuring the stability and safety of gas transportation.

[0024] like Figure 12As shown, in this embodiment, the spherical buffer member 61 includes a buffer ball 611, which is connected between the first shunt pipe 62 and the second shunt pipe 63. A rotating rod 612 is rotatably installed in the buffer ball 611, and a stainless steel blade 613 is fixed on the rotating rod 612. A torsion spring 614 is sleeved on the rotating rod 612, and the two ends of the torsion spring 614 are respectively connected to the end of the stainless steel blade 613 and the inner wall of the buffer ball 611; When the gas enters the buffer ball 611, it will impact the stainless steel blade 613, causing the rotating rod 612 to rotate. The stainless steel blade 613 cuts and diverts the gas during the rotation process, disperses the impact force of the gas, and plays a buffering role. When the stainless steel blade 613 rotates, the torsion spring 614 is twisted to store elastic potential energy. When the impact force of the gas decreases, the torsion spring 614 drives the stainless steel blade 613 to reset so as to buffer the gas again, thereby improving the buffering efficiency and reusability of the spherical buffer 61.

[0025] like Figure 1 、 Figure 9 and Figure 10 As shown, in this embodiment, the smearing member 3 includes an annular smearing tube 31, which is mounted on the connection between the curved pipe 1 and the straight pipe 102. The annular smearing tube 31 is connected to the glue supply member 4, and a plurality of smearing holes 32 are provided on the inner wall of the annular smearing tube 31. When the glue supply member 4 transports glue into the annular smearing tube 31, the glue is evenly smeared on the connection between the curved pipe 1 and the straight pipe 102 through the plurality of smearing holes 32, ensuring that every part of the connection can be sealed by glue, thereby improving the reliability of the seal and effectively preventing gas leakage.

[0026] like Figure 1 、 Figure 2 and Figure 7 As shown, in this embodiment, the glue supply part 4 includes a glue cylinder 41, a first conduit 42, a second conduit 43 and an elastic push piece 44. The first conduit 42 is connected to the buffer cylinder 21, and the first conduit 42 is communicated with the upper part of the air cavity 212. The second conduit 43 is connected to the annular smear tube 31. The glue cylinder 41 is connected between the first conduit 42 and the second conduit 43. The elastic push piece 44 is installed in the glue cylinder 41. A sealing film 431 is provided at one end of the second conduit 43 close to the glue cylinder 41. The glue is provided between the elastic push piece 44 and the sealing film 431. When the gas enters the glue cylinder 41, pushes the elastic push piece 44 to pierce the sealing film 431, and pushes the glue into the second conduit 43; when the gas enters the glue cylinder 41, the internal pressure increases, pushing the elastic push piece 44 to move toward the sealing film 431. After the elastic push piece 44 pierces the sealing film 431, the glue in the glue cylinder 41 is pushed into the annular application tube 31 through the second conduit 43. The sealing film 431 can seal the glue in the glue cylinder 41 before being punctured, preventing the glue from flowing out prematurely and becoming ineffective, ensuring that the glue can only be used when needed, and improving the timeliness and effectiveness of glue use.

[0027] like Figure 8 As shown, in this embodiment, the elastic pusher 44 includes a second spring 441 and a third piston 442 arranged in the glue cylinder 41, one end of the second spring 441 is connected to the inner wall of one end of the glue cylinder 41 close to the first conduit 42, and the third piston 442 is installed at the end of the second spring 441. The third piston 442 is provided with a piercing rod 443 arranged toward the sealing membrane 431; when gas enters the glue cylinder 41, the gas pressure pushes the third piston 442 to stretch the second spring 441, so that the third piston 442 moves toward the sealing membrane 431, and the piercing rod 443 on the third piston 442 punctures the sealing membrane 431 as the third piston 442 moves, pushing the glue out of the glue cylinder 41, and pushing it into the annular application tube 31 through the second conduit 43.

[0028] like Figure 1 、 Figure 2 、 Figure 9 and Figure 10 As shown, in this embodiment, the water spray part 5 includes an annular water spray pipe 51, a connecting pipe 52 and a water guide pipe 53. A plurality of circumferentially arranged connecting pipes 52 are fixed on the annular coating tube 31. The annular water spray pipe 51 is sleeved on the plurality of connecting pipes 52 and is connected with them. The water guide pipe 53 is connected between the annular water spray pipe 51 and the buffer cylinder 21, and the water guide pipe 53 is connected with the water storage chamber 213. A water spray hole 521 is provided on the connecting pipe 52; the water guide pipe 53 introduces the water in the water storage chamber 213 in the buffer cylinder 21 into the annular water spray pipe 51, and the annular water spray pipe 51 diverts the water through the plurality of connecting pipes 52. The water spray holes 521 on the connecting pipe 52 spray the water evenly at the connection between the curved pipe 1 and the straight pipe 102, thereby effectively reducing the temperature of the connection and protecting the material and glue performance of the connection.

[0029] like Figure 10 As shown, in this embodiment, a plurality of water spray holes 521 are provided, which are evenly distributed along the outer circumference of the connecting pipe 52, so that the water source is sprayed in a range; the connection between the curved pipe 1 and the straight pipe 102 is fully covered. This design can ensure that every corner of the connection can be sprayed with water, thereby improving the cooling effect, avoiding damage to the connection due to insufficient local cooling, and further enhancing the protection of the connection.

[0030] In a specific embodiment, the gas flow direction of the present invention is as follows Figure 2 As shown, the explosion-proof steel pipe of the present invention includes but is not limited to flammable gases.

[0031] The specific working principle of the present invention is as follows: When an explosion occurs in the straight pipe 102 at one end of the elbow 1, the gas shock wave generated by the explosion first hits the explosion-proof ball 101 at the curved section of the elbow 1. The explosion-proof ball 101 performs preliminary buffering on the gas. Part of the gas directly enters the straight pipe 102 below the elbow 1, and the other part of the gas enters the air cavity 212 through the opening at the bottom of the buffer cylinder 21, pushing the first piston 222 upward. The shaft 221 drives the second piston 223 to move upward synchronously. The first spring 224 is compressed, and the first piston 222 moves upward to perform secondary buffering on the gas, while squeezing the gas in the air cavity 212. The gas enters the glue cylinder 41 through the first conduit 42; The third piston 442 in the glue cylinder 41 stretches the second spring 441 under the action of gas pressure, and the piercing rod 443 punctures the sealing membrane 431. The glue enters the annular application tube 31 through the second conduit 43 and is applied to the connection between the curved tube 1 and the straight tube 102 through the application hole 32 to enhance the sealing performance. At the same time, the second piston 223 moves upward to squeeze the water in the water storage chamber 213. The water enters the annular water spray pipe 51 through the water guide pipe 53 and is sprayed on the connection point through the water spray hole 521 on the connecting pipe 52, thereby reducing the temperature. Part of the gas that enters the air chamber 212 pushes the first piston 222 upward, enters the buffer ball 611 through the first diverter pipe 62, and impacts the stainless steel blade 613, causing the rotating rod 612 to rotate and twist the torsion spring 614. After being dispersed and buffered, the gas enters the straight pipe 102 below the elbow 1 through the second diverter pipe 63 and the one-way valve 631. Through the coordinated work of the above multiple components, multiple buffering of explosion shock waves, sealing reinforcement and temperature reduction protection of the joints are achieved, effectively improving the explosion-proof performance and safety of the precision-rolled explosion-proof steel pipe.

[0032] The above describes an embodiment of the present invention, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms based on the inspiration of this embodiment, all of which are protected by this embodiment.

Claims

1. A precision rolled explosion-proof steel pipe, characterized in that: It includes a bend pipe (1) and a diversion module (6); The curved section of the curved pipe (1) is connected to an explosion-proof ball (101), and both ends are connected to straight pipes (102); The explosion-proof ball (101) is connected to a buffer module (2), which includes an air cavity (212), a water storage cavity (213) and a piston member (22). The piston member (22) cooperates with the air cavity (212) and the water storage cavity (213). The diversion module (6) is respectively connected to the buffer module (2) and the straight pipe (102) below the bend (1). When an explosion occurs, gas enters the buffer module (2) and pushes the piston member (22) upward, and then enters the straight pipe (102) below the bend (1) after being buffered by the diversion module (6). A smearing member (3) is mounted on the connection between the curved pipe (1) and the straight pipe (102), and a glue supply member (4) is connected between the buffer module (2) and the smearing member (3). When the piston member (22) moves upward, the gas in the air cavity (212) is transported to the glue supply member (4), so that the glue enters the smearing member (3) and is smeared on the connection between the curved pipe (1); The smearing member (3) is provided with a water spraying member (5) connected to the water storage chamber (213). When the piston member (22) moves upward, water in the water storage chamber (213) is transported to the water spraying member (5) and sprayed on the connection.

2. The precision rolled explosion-proof steel pipe according to claim 1, characterized in that: The buffer module (2) further comprises a buffer cylinder (21), which is mounted on the explosion-proof ball (101). A separation disk (211) is mounted in the buffer cylinder (21). The air cavity (212) and the water storage cavity (213) are both arranged in the buffer cylinder (21) and separated by the separation disk (211), so that the glue component (4) is in communication with the air cavity (212). The bottom of the buffer cylinder (21) is provided with openings respectively in communication with the explosion-proof ball (101) and the air cavity (212). The piston component (22) is mounted on the separation disk (211), with its two ends respectively located in the air cavity (212) and the water storage cavity (213), and the bottom end of the piston component (22) is sealed in the opening. The buffer cylinder (21) is connected to a one-way air inlet valve (201) and a one-way air outlet valve (202) in communication with the air cavity (212).

3. The precision rolled explosion-proof steel pipe according to claim 2, characterized in that: The piston member (22) includes a shaft (221), the shaft (221) slides through the middle of the separation plate (211), and a first piston (222) and a second piston (223) are fixed to the two ends of the shaft (221), respectively. The first piston (222) is sealed in the opening at the bottom of the air cavity (212), and the second piston (223) is located in the water storage cavity (213). A first spring (224) is sleeved on the shaft (221), and the two ends of the first spring (224) are respectively connected to the separation plate (211) and the first piston (222).

4. The precision rolled explosion-proof steel pipe according to claim 3, characterized in that: The diversion module (6) includes a spherical buffer (61), a first diversion pipe (62) and a second diversion pipe (63). The first diversion pipe (62) is connected to the bottom of the buffer cylinder (21) and is directly opposite to the first piston (222). When the first piston (222) moves upward, gas enters the first diversion pipe (62). The second diversion pipe (63) is connected to the straight pipe (102) below the curved pipe (1). The spherical buffer (61) is connected between the first diversion pipe (62) and the second diversion pipe (63). A one-way valve (631) is installed on the second diversion pipe (63).

5. The precision rolled explosion-proof steel pipe according to claim 4, characterized in that: The spherical buffer member (61) includes a buffer ball (611), which is connected between the first diversion tube (62) and the second diversion tube (63). A rotating rod (612) is rotatably installed in the buffer ball (611), and a stainless steel blade (613) is fixed on the rotating rod (612). A torsion spring (614) is sleeved on the rotating rod (612), and the two ends of the torsion spring (614) are respectively connected to the end of the stainless steel blade (613) and the inner wall of the buffer ball (611).

6. The precision rolled explosion-proof steel pipe according to claim 5, characterized in that: The smearing member (3) comprises an annular smearing tube (31), which is sleeved at the connection between the curved tube (1) and the straight tube (102), and is connected to the glue supply member (4). The inner wall of the annular smearing tube (31) is provided with a plurality of smearing holes (32).

7. The precision rolled explosion-proof steel pipe according to claim 6, characterized in that: The glue supply component (4) includes a glue cylinder (41), a first conduit (42), a second conduit (43) and an elastic push piece (44), wherein the first conduit (42) is connected to the buffer cylinder (21), and the first conduit (42) is communicated with the upper part of the air cavity (212), the second conduit (43) is connected to the annular smear tube (31), the glue cylinder (41) is connected between the first conduit (42) and the second conduit (43), the elastic push piece (44) is installed in the glue cylinder (41), and a sealing film (431) is provided at one end of the second conduit (43) close to the glue cylinder (41), and glue is provided between the elastic push piece (44) and the sealing film (431). When gas enters the glue cylinder (41), it pushes the elastic push piece (44) to pierce the sealing film (431), and pushes the glue into the second conduit (43).

8. The precision rolled explosion-proof steel pipe according to claim 7, characterized in that: The elastic pusher (44) includes a second spring (441) and a third piston (442) arranged in the glue cylinder (41), one end of the second spring (441) is connected to the inner wall of one end of the glue cylinder (41) close to the first conduit (42), and the third piston (442) is installed at the end of the second spring (441). The third piston (442) is installed with a puncture rod (443) arranged toward the sealing membrane (431).

9. The precision rolled explosion-proof steel pipe according to claim 8, characterized in that: The water spraying member (5) comprises an annular water spraying pipe (51), a connecting pipe (52) and a water guide pipe (53). A plurality of circumferentially arranged connecting pipes (52) are fixed to the annular smearing pipe (31). The annular water spraying pipe (51) is sleeved on the plurality of connecting pipes (52) and communicated with the connecting pipes. The water guide pipe (53) is connected between the annular water spraying pipe (51) and the buffer cylinder (21), and the water guide pipe (53) is communicated with the water storage chamber (213). A water spray hole (521) is provided on the connecting pipe (52).

10. The precision rolled explosion-proof steel pipe according to claim 9, characterized in that: A plurality of water spray holes (521) are provided, evenly distributed along the outer circumference of the connecting pipe (52), so that the water source is sprayed in a range.

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