A finished shaped explosion-proof steel pipe

Abstract

The present application relates to the technical field of steel pipe, and discloses a precision-forged anti-explosion steel pipe, which comprises a bend pipe and a flow distribution module; the bend section of the bend pipe is connected with an anti-explosion ball, and the two ends are connected with straight pipes; the anti-explosion ball is connected with a buffer module, the buffer module comprises a gas cavity, a water storage cavity and a piston piece, the piston piece is matched with the gas cavity and the water storage cavity, the flow distribution module is connected with the buffer module and the straight pipes below the bend pipe respectively, and when explosion occurs, gas enters the buffer module to push the piston piece to move upwards. The anti-explosion ball, the buffer module and the flow distribution module are used to buffer explosion shock wave for multiple times, stress concentration at the connection of the bend pipe is reduced, the anti-damage capacity is improved, the smearing piece and the glue supply piece are arranged to solve the problem of aging and leakage of the rubber ring caused by high temperature, the sealing property is enhanced, the piston piece moves upwards to convey water source to the water spraying piece, water spraying is used for cooling to protect the material property and the glue property at the connection, the sealing property and the structural stability are ensured, and the problems of deformation and stress concentration aggravation caused by high temperature are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel pipes, in particular to a precision-forged and formed anti-explosion steel pipe. BACKGROUND

[0002] In some special industrial fields, such as petroleum, chemical industry, natural gas, etc., steel pipes with anti-explosion performance are needed to ensure safety. In these fields, there are flammable and explosive gases or dusts. Once an explosion occurs, ordinary steel pipes may be broken due to the inability to withstand the huge pressure, thereby causing more serious safety accidents. The production of precision-forged and formed anti-explosion steel pipes usually includes pipe blank heating, piercing, pipe rolling, sizing, etc. Through the precision-forging process, the dimensional accuracy of the steel pipe is higher, and the surface quality is better, thereby improving the overall performance.

[0003] Through retrieval, a patent with publication number CN213954574U discloses an anti-explosion steel pipe for petroleum and chemical industry pipeline, which comprises a pipe body. The pipe body is externally sleeved with a stainless steel pipe. The inner diameter of the stainless steel pipe is larger than the outer diameter of the pipe body. Spring columns are uniformly distributed between the inner side wall of the stainless steel pipe and the outer side wall of the pipe body. Thermal insulation cotton is filled between the stainless steel pipe and the pipe body. The inner wall of the pipe body is covered with a corrosion-resistant layer. The above technical solution mainly uses spring columns uniformly distributed between the inner side wall of the stainless steel pipe and the outer side wall of the pipe body to form an anti-explosion layer with the stainless steel pipe, thereby improving the pressure resistance of the entire pipe body. However, the above solution still has the following problems:

[0004] In petroleum and natural gas transportation, anti-explosion steel pipes need to be arranged. For some locations with height differences, elbow pipes are used to connect two anti-explosion pipes. When flammable and explosive gases appear in the anti-explosion pipes, although the anti-explosion pipes can withstand the explosion impact due to their unique structural strength, the elbow pipe connections often cannot withstand such violent impact. Under the action of explosion shock waves, stress concentration is more obvious at the connection, the stress level in the local area is much higher than that in the straight pipe section, which easily leads to material yield or even rupture. Moreover, the rigidity of the elbow pipe connection is relatively weak, and it is more prone to deformation under the action of explosion impact force. This deformation further aggravates stress concentration, forming a vicious cycle, and eventually leading to the destruction of the connection.

[0005] To solve the above problems, a precision-forged and formed anti-explosion steel pipe is proposed in the present application. SUMMARY

[0006] The present application proposes a precision-forged and formed anti-explosion steel pipe, which solves the problem in the related art that in the arrangement of anti-explosion steel pipes for petroleum and natural gas transportation with height differences, the elbow pipe connection is prone to stress concentration due to explosion shock waves, the rigidity is weak, the deformation aggravates stress concentration, a vicious cycle is formed, and finally the connection is destroyed.

[0007] The application provides a finished forming anti-explosion steel pipe, which comprises a bend pipe and a flow distribution module.

[0008] The bend pipe is connected with an anti-explosion ball, and both ends are connected with straight pipes.

[0009] The anti-explosion ball is connected with a buffer module, the buffer module comprises a gas cavity, a water storage cavity and a piston, the piston is matched with the gas cavity and the water storage cavity, the flow distribution module is connected with the buffer module and the straight pipes below the bend pipe, when explosion occurs, the gas enters the buffer module to push the piston to move upwards, and then the gas is buffered by the flow distribution module and enters the straight pipes below the bend pipe.

[0010] The connection part of the bend pipe and the straight pipe is sleeved with a smearing piece, the buffer module and the smearing piece are connected with a glue supply piece, when the piston moves upwards, the gas in the gas cavity is transported to the glue supply piece, so that the glue is smeared on the connection part of the bend pipe by the smearing piece.

[0011] The smearing piece is sleeved with a water spraying piece which is communicated with the water storage cavity, when the piston moves upwards, the water source in the water storage cavity is transported to the water spraying piece and is sprayed on the connection part.

[0012] As a further optimization scheme of the application, the buffer module further comprises a buffer cylinder, the buffer cylinder is installed on the anti-explosion ball, a partition disc is installed in the buffer cylinder, the gas cavity and the water storage cavity are arranged in the buffer cylinder and are separated by the partition disc, the glue supply piece is communicated with the gas cavity, the bottom of the buffer cylinder is provided with openings which are respectively communicated with the anti-explosion ball and the gas cavity, the piston is installed on the partition disc, both ends of the piston are located in the gas cavity and the water storage cavity respectively, and the bottom end of the piston is sealed in the opening, and the buffer cylinder is connected with a one-way air inlet valve and a one-way air outlet valve which are communicated with the gas cavity.

[0013] As a further optimization scheme of the application, the piston comprises a shaft, the shaft is slidably arranged through the middle part of the partition disc, and both ends of the shaft are fixed with a first piston and a second piston respectively, the first piston is sealed in the opening at the bottom of the gas cavity, the second piston is located in the water storage cavity, a first spring is sleeved on the shaft, and both ends of the first spring are connected with the partition disc and the first piston respectively.

[0014] As a further optimization scheme of the application, the flow distribution module comprises a spherical buffer piece, a first flow distribution pipe and a second flow distribution pipe, the first flow distribution pipe is connected with the bottom of the buffer cylinder and is opposite to the first piston, the gas enters the first flow distribution pipe when the first piston moves upwards, the second flow distribution pipe is connected with the straight pipe below the bend pipe, the spherical buffer piece is connected between the first flow distribution pipe and the second flow distribution pipe, and a one-way valve is installed on the second flow distribution pipe.

[0015] As a further optimization scheme of the present application, the spherical buffer member comprises a buffer ball connected between the first and second shunt pipes, a rotating rod rotatably installed in the buffer ball, a stainless steel blade fixed on the rotating rod, and a torsion spring sleeved on the rotating rod and connected at both ends thereof to the end of the stainless steel blade and the inner wall of the buffer ball.

[0016] As a further optimization scheme of the present application, the smearing member comprises an annular smearing pipe sleeved at the connection between the elbow pipe and the straight pipe, connected with the glue supply member, and provided with a plurality of smearing holes in the inner wall thereof.

[0017] As a further optimization scheme of the present application, the glue supply member comprises a glue cylinder, a first conduit, a second conduit and an elastic pushing member, the first conduit is connected with the buffer cylinder and in communication with the upper portion of the air cavity, the second conduit is connected with the annular smearing pipe, the glue cylinder is connected between the first and second conduits, the elastic pushing member is installed in the glue cylinder, the end of the second conduit close to the glue cylinder is provided with a sealing film, and the glue is arranged between the elastic pushing member and the sealing film, so that when the gas enters the glue cylinder, the elastic pushing member is pushed to pierce the sealing film and push the glue into the second conduit.

[0018] As a further optimization scheme of the present application, the elastic pushing member comprises a second spring and a third piston arranged in the glue cylinder, one end of the second spring is connected with the inner wall of the end of the glue cylinder close to the first conduit, the third piston is installed at the end of the second spring, and a needle rod is arranged on the third piston and faces the sealing film.

[0019] As a further optimization scheme of the present application, the water spraying member comprises an annular water spraying pipe, a connecting pipe and a water guide pipe, a plurality of connecting pipes are arranged in the circumferential direction on the annular smearing pipe, the annular water spraying pipe is sleeved on and in communication with the connecting pipes, the water guide pipe is connected between the annular water spraying pipe and the buffer cylinder and in communication with the water storage cavity, and the connecting pipe is provided with a water spraying hole.

[0020] As a further optimization scheme of the present application, the water spraying hole is provided with a plurality of holes distributed along the outer periphery of the connecting pipe, so that the water source is sprayed in a range.

[0021] The above technical scheme of the present application has the following beneficial technical effects:

[0022] 1. When the straight pipe at one end of the elbow pipe explodes, the gas shock wave first buffers once in the explosion-proof ball of the elbow pipe bending section, part of the gas enters the straight pipe below the explosion-proof ball, part of the gas pushes the piston piece in the buffer module to move up to realize secondary buffering, the shock wave gas enters the shunt module for tertiary buffering, and finally merges with the gas in the straight pipe below, the design of multiple buffering reduces the direct impact of the explosion shock wave on the connection of the elbow pipe, reduces stress concentration, avoids material yield and fracture, reduces deformation, prevents vicious cycle, and improves the damage resistance of the connection;

[0023] 2. In order to ensure the sealing, a rubber ring is arranged at the connection of the elbow pipe and the straight pipe, but the high temperature generated during explosion can cause the rubber ring to age rapidly and leak, therefore, a coating piece is sleeved at the connection, the piston piece is pushed up by the shock wave gas during explosion, the gas cavity gas is transported to the glue supply piece, the glue supply piece pushes the glue to the coating piece under the action of pressure, and the glue is coated on the outer periphery of the connection, the 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;

[0024] 3. When the piston piece moves up, the water source in the water storage cavity can also be transported to the water spraying piece sleeved on the coating piece, the cold water is sprayed to the connection between the elbow pipe and the straight pipe through the water spraying piece, the temperature generated at the connection due to high temperature during explosion is effectively reduced, the further damage of high temperature to the material performance of the connection is avoided, the performance of the coated glue is also helped to protect, the sealing and structural stability of the connection are further ensured, and the problems of deformation and stress concentration caused by high temperature are also reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a whole structure schematic diagram of the finished rolling forming explosion-proof steel pipe proposed in the application;

[0026] Figure 2 It is a front view of the finished rolling forming explosion-proof steel pipe proposed in the application;

[0027] Figure 3 It is a back structure schematic diagram of the finished rolling forming explosion-proof steel pipe proposed in the application;

[0028] Figure 4 It is a structure schematic diagram of the buffer module of the application;

[0029] Figure 5 It is a plane structure diagram of the buffer module of the application;

[0030] Figure 6 It is a structure schematic diagram of the piston piece of the application;

[0031] Figure 7 It is a structure schematic diagram of the glue supply piece of the application;

[0032] Figure 8 For the purpose of the present application Figure 7 Enlarged view of A in the present application;

[0033] Figure 9 For the cooperation structure diagram of the application coating and water spraying element;

[0034] Figure 10 For the purpose of the present application Figure 9 Enlarged view of B in the present application;

[0035] Figure 11 For the structure diagram of the application shunt module;

[0036] Figure 12 For the structure diagram of the application spherical buffer element.

[0037] Reference signs: 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 disc; 212, air cavity; 213, water storage cavity; 22, piston element; 221, shaft; 222, first piston; 223, second piston; 224, first spring; 3, coating element; 31, annular coating pipe; 32, coating hole; 4, glue supply element; 41, glue cylinder; 42, first conduit; 43, second conduit; 431, sealing film; 44, elastic pushing element; 441, second spring; 442, third piston; 443, needle bar; 5, water spraying element; 51, annular water spraying pipe; 52, connecting pipe; 521, water spraying hole; 53, water guide pipe; 6, shunt module; 61, spherical buffer element; 611, buffer ball; 612, rotating rod; 613, stainless steel blade; 614, torsional spring; 62, first shunt pipe; 63, second shunt pipe; 631, one-way valve. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions and advantages of the present application more clear and explicit, the present application is further described in detail below with specific embodiments and with reference to the drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0039] As Figures 1 to 12 shown, the present application proposes a finish forming explosion-proof steel pipe, which includes an elbow 1 and a shunt module 6.

[0040] The elbow 1 is connected with an explosion-proof ball 101, and both ends are connected with straight pipes 102.

[0041] 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.

[0042] 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;

[0043] 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.

[0044] 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;

[0045] 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.

[0046] 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.

[0047] like Figure 4 and Figure 5As shown, in the embodiment, the buffer module 2 further comprises a buffer cylinder 21, the buffer cylinder 21 is installed on the explosion-proof ball 101, a partition disc 211 is installed in the buffer cylinder 21, a gas cavity 212 and a water storage cavity 213 are both arranged in the buffer cylinder 21 and are separated by the partition disc 211, the glue supply part 4 is in communication with the gas cavity 212, an opening in communication with the explosion-proof ball 101 and the gas cavity 212 is arranged at the bottom of the buffer cylinder 21, a piston part 22 is installed on the partition disc 211, both ends of the piston part 22 are located in the gas cavity 212 and the water storage cavity 213 respectively, and the bottom end of the piston part 22 is sealed in the opening, the buffer cylinder 21 is connected with a one-way air inlet valve 201 and a one-way air outlet valve 202 in communication with the gas cavity 212;

[0048] When the explosion gas enters the buffer cylinder 21, the gas in the gas cavity 212 is extruded, the power for the glue supply of the glue supply part 4 is provided, the one-way air inlet valve 201 allows the external gas to enter the gas cavity 212 for supplement, the gas cavity 212 is ensured to have sufficient gas supply, the one-way air outlet valve 202 can control the exhaust direction of the gas in the gas cavity 212, is used for exhaust when the piston part 22 is restored, and ensures that the gas can only flow to the glue supply part 4, so as to stably provide pressure for the glue supply, the opening at the bottom of the buffer cylinder 21 enables the explosion gas to enter the gas cavity 212 and push the piston part 22 to move, and the functions of buffering and power transmission are realized.

[0049] As shown in the figure, Figure 5 As shown in the figure, Figure 6 As shown, in the embodiment, the piston part 22 comprises a shaft 221, the shaft 221 slides through the middle part of the partition disc 211, and both ends of the shaft 221 are fixed with a first piston 222 and a second piston 223 respectively, the first piston 222 is sealed in the opening at the bottom of the gas 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 both ends of the first spring 224 are connected with the partition disc 211 and the first piston 222 respectively;

[0050] When the explosion gas enters the gas cavity 212, the gas pushes the first piston 222 to move upwards, the shaft 221 drives the second piston 223 to move upwards, the first piston 222 is sealed in the opening at the bottom of the gas cavity 212, can effectively block the direct impact of the gas, plays a buffering role, and compresses the gas in the gas cavity 212 in the moving process, provides power for the glue supply part 4, the second piston 223 moves in the water storage cavity 213, extrudes the water in the water storage cavity 213, so that the water can flow into the water spraying part 5 smoothly, and when the first piston 222 moves upwards, the first spring 224 is compressed, stores elastic potential energy, and when the explosion impact force decreases, the elastic potential energy of the first spring 224 is released, pushes the first piston 222 to reset, so as to work next time, and the reusability of the buffer module 2 is improved.

[0051] As shown in the figure, Figure 3 As shown in the figure,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.

[0052] 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.

[0053] like Figure 12 As 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;

[0054] 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.

[0055] 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.

[0056] As Figure 1 , Figure 2 With Figure 7 shown, in this embodiment, the glue member 4 includes glue cylinder 41, first conduit 42, second conduit 43 and elastic push member 44, the first conduit 42 is connected with 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 with the annular coating pipe 31, the glue cylinder 41 is connected between the first conduit 42 and the second conduit 43, the elastic push member 44 is installed in the glue cylinder 41, the second conduit 43 is provided with a sealing film 431 at one end close to the glue cylinder 41, glue is arranged between the elastic push member 44 and the sealing film 431, when the gas enters the glue cylinder 41, the elastic push member 44 is pushed to pierce the sealing film 431, and the glue is pushed into the second conduit 43; when the gas enters the glue cylinder 41, the internal pressure increases, the elastic push member 44 is pushed to move towards the sealing film 431, after the elastic push member 44 pierces the sealing film 431, the glue in the glue cylinder 41 is pushed into the annular coating pipe 31 through the second conduit 43, the sealing film 431 can seal the glue in the glue cylinder 41 before being pierced, preventing the glue from flowing out in advance and being invalid, ensuring that the glue can be used when needed, and improving the timeliness and effectiveness of the glue use.

[0057] As Figure 8 shown, in this embodiment, the elastic push member 44 includes the second spring 441 and the third piston 442 arranged in the glue cylinder 41, one end of the second spring 441 is connected with the inner wall of the end of the glue cylinder 41 close to the first conduit 42, the third piston 442 is installed at the end of the second spring 441, and the needle rod 443 is arranged on the third piston 442 and faces the sealing film 431; when the 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 towards the sealing film 431, the needle rod 443 on the third piston 442 pierces the sealing film 431 along with the movement of the third piston 442, and the glue is pushed out of the glue cylinder 41 and pushed into the annular coating pipe 31 through the second conduit 43.

[0058] As Figure 1 , Figure 2 , Figure 9 With Figure 10As shown, in the embodiment, the water spraying member 5 comprises a ring-shaped water spraying pipe 51, connecting pipes 52 and a water guide pipe 53, the ring-shaped water spraying pipe 51 is sleeved on the connecting pipes 52 and communicates with the connecting pipes 52, the water guide pipe 53 is connected between the ring-shaped water spraying pipe 51 and the buffer cylinder 21, and the water guide pipe 53 communicates with the water storage cavity 213, and the connecting pipes 52 are provided with water spraying holes 521.

[0059] As shown in the drawings, Figure 10 In the embodiment, the water spraying holes 521 are provided in plurality and are uniformly distributed along the outer periphery of the connecting pipes 52, so that the water source is sprayed in a range, and the connection between the elbow pipe 1 and the straight pipe 102 is fully covered, which can ensure that each corner of the connection is sprayed by water, improve the cooling effect, avoid damage of the connection due to incomplete local cooling, and further enhance the protection of the connection.

[0060] In the embodiment, the gas flow direction of the present application is as shown in the drawings, Figure 2 The explosion-proof steel pipe of the present application includes but is not limited to flammable gas.

[0061] The specific working principle of the present application is as follows:

[0062] When an explosion occurs in the straight pipe 102 at one end of the elbow pipe 1, the gas shock wave generated by the explosion first impacts the explosion-proof ball 101 of the curved section of the elbow pipe 1, the explosion-proof ball 101 preliminarily buffers the gas, part of the gas directly enters the straight pipe 102 below the elbow pipe 1, and the other part of the gas enters the air cavity 212 through the opening at the bottom of the buffer cylinder 21, pushes the first piston 222 to move upward, the shaft rod 221 drives the second piston 223 to move upward synchronously, the first spring 224 is compressed, the first piston 222 moves upward to buffer the gas for the second time, and at the same time, the gas in the air cavity 212 is extruded, and the gas enters the glue cylinder 41 through the first conduit 42;

[0063] The third piston 442 in the glue cylinder 41 stretches the second spring 441 under the action of the gas pressure, the needle rod 443 pierces the sealing film 431, the glue enters the ring-shaped coating pipe 31 through the second conduit 43, and is coated on the connection between the elbow pipe 1 and the straight pipe 102 through the coating hole 32, so as to enhance the sealing performance;

[0064] At the same time, the second piston 223 moves up to extrude the water in the water storage cavity 213, the water enters the annular water spraying pipe 51 through the water guide pipe 53, and then is sprayed on the connecting part through the water spraying hole 521 on the connecting pipe 52 to reduce the temperature, and the part of the gas entering the air cavity 212 pushes the first piston 222 to move up, then enters the buffer ball 611 through the first shunt pipe 62, impacts the stainless steel blade 613, makes the rotating rod 612 rotate and twists the torsion spring 614, and the gas is dispersed and buffered, then enters the straight pipe 102 below the elbow pipe 1 through the second shunt pipe 63 and the one-way valve 631;

[0065] Through the cooperation of the above multiple components, the multiple buffering of the explosion shock wave, the sealing reinforcement and the temperature reduction protection of the connecting part are realized, and the explosion-proof performance and safety of the finish-rolled formed explosion-proof steel pipe are effectively improved.

[0066] The above describes the embodiments of the present application, but the embodiments are not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the embodiments, which all belong to the protection of the embodiments.

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, the water in the water storage chamber (213) is transported to the water spraying member (5) and sprayed on the connection point. The buffer module (2) further comprises a buffer cylinder (21), the buffer cylinder (21) being mounted on the explosion-proof ball (101), a separating disc (211) being mounted in the buffer cylinder (21), an air cavity (212) and a water storage cavity (213) being both arranged in the buffer cylinder (21) and separated by the separating disc (211), for the glue component (4) to communicate with the air cavity (212), an opening being respectively connected with the explosion-proof ball (101) and the air cavity (212), a piston component (22) being mounted on the separating disc (211), and its two ends being respectively located in the air cavity (212) and the water storage cavity (213), and the bottom end of the piston component (22) being blocked in the opening, and a one-way air inlet valve (201) and a one-way air outlet valve (202) being connected with the air cavity (212) being connected to the buffer cylinder (21); 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), 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 connected to the separation plate (211) and the first piston (222), respectively. 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).

2. The precision rolled explosion-proof steel pipe according to claim 1, 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).

3. The precision rolled explosion-proof steel pipe according to claim 2, 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).

4. The precision rolled explosion-proof steel pipe according to claim 3, 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).

5. The precision rolled explosion-proof steel pipe according to claim 4, 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).

6. The precision rolled explosion-proof steel pipe according to claim 5, 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).

7. The precision rolled explosion-proof steel pipe according to claim 6, 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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