Fluid delivery pipe and method of assembly

Abstract

The invention provides a fluid conveying pipe and an assembling method, and belongs to the field of fluid conveying. The fluid delivery pipe comprises a pipe joint and a connecting assembly. The pipe joint comprises a first pipe body, a second pipe body, a first reducing ring, a second reducing ring, a first flange and a second flange, the second pipe body is sleeved with the first pipe body, the first flange and the second flange are each provided with a fluid hole, and the fluid holes are communicated with a gap between the inner wall of the first pipe body and the outer wall of the second pipe body. The connecting assembly comprises a connecting rod, a baffle and a locking head, the connecting rod is clamped between the first flange and the second flange adjacent to each other, the baffle abuts against the inner wall of the first flange and the inner wall of the second flange adjacent to each other, and when the locking head is located in the fluid hole, the locking head is converted into an open state from a contraction state and abuts against the inner wall of the fluid hole. The temperature change of the conveyed fluid can be reduced in the long-distance fluid conveying process.

Description

Technical Field

[0001] The present invention relates to the field of fluid transportation, and in particular to a fluid transportation pipe and an assembly method thereof. Background Art

[0002] During long-distance fluid transportation, the temperature of the transported liquid fluid cannot change significantly, and the pipeline for transporting the liquid fluid needs to have the function of keeping the transported liquid fluid warm.

[0003] In the related art, two adjacent pipelines are first arranged, with the fluid liquid cargo to be transported flowing in one pipeline and the thermal insulation medium with a large specific heat capacity flowing in the other pipeline. The two pipelines are adjacent to each other and the fluid liquid cargo and the thermal insulation medium in the two pipelines exchange heat, thereby reducing the temperature change of the fluid liquid cargo to be transported at the starting point and the end point of the transportation.

[0004] However, in the related art, it is often inconvenient to lay out two pipes due to space limitations, and heat is easily lost. Summary of the invention

[0005] The embodiment of the present disclosure provides a fluid delivery pipe and an assembly method, which can reduce the temperature change of the delivered fluid during long-distance fluid delivery. The technical solution is as follows:

[0006] The embodiment of the present disclosure provides a fluid delivery pipe, including a pipe joint and a connection assembly. The pipe joint includes a first pipe body, a second pipe body, a first reducer ring, a second reducer ring, a first flange and a second flange, the first pipe body is sleeved outside the second pipe body, the first end of the first pipe body is connected to the first end of the first reducer ring, the second end of the first pipe body is connected to the first end of the second reducer ring, the second end of the first reducer ring and the first end of the second pipe body are respectively connected to the first surface of the first flange, the second end of the second reducer ring and the second end of the second pipe body are respectively connected to the first surface of the second flange, and the first flange and the second flange both have a fluid hole, and the fluid hole is connected to the gap between the inner wall of the first pipe body and the outer wall of the second pipe body. The connecting assembly includes a connecting rod, a baffle and a locking head. The connecting rod is clamped between the second surfaces of two adjacent first flanges and second flanges. The baffle is connected to the first end of the connecting rod, and the baffle is abutted against the inner walls of the adjacent first flange and second flange. The locking head is connected to the second end of the connecting rod. When the locking head is located in the fluid hole, the locking head changes from a contracted state to an open state and abuts against the inner wall of the fluid hole.

[0007] In an implementation of the present disclosure, the inner walls of the first flange and the second flange are both provided with bosses, and the baffle is attached to the outside of the bosses with one side facing the inner walls of the first flange and the second flange.

[0008] In another implementation of the present disclosure, the locking head is a spherical elastic member, and the inner wall of the locking head is connected to the connecting rod. When the locking head is in a contracted state, the inner wall of the locking head is in contact with the connecting rod, and when the locking head is in an open state, the bottom edge of the locking head is against the inner wall of the fluid hole.

[0009] In another implementation of the present disclosure, the second surfaces of the first flange and the second flange each have a slot, and the slots of two adjacent first flanges and second flanges are arranged opposite to each other to form a socket, and the connecting rod is inserted into the socket.

[0010] In another implementation of the present disclosure, the second diameter-reducing ring includes a first half ring and a second half ring. The inner arc surfaces of the first half ring and the second half ring are opposite and coaxially connected.

[0011] In another implementation of the present disclosure, the first surfaces of the first flange and the second flange each have a first connecting ring and a second connecting ring. The first connecting ring and the second connecting ring are respectively located on both sides of the fluid hole. The first connecting ring is connected to the first reducing ring or the second reducing ring. The second connecting ring is connected to an end of the second pipe body.

[0012] In yet another implementation of the present disclosure, the tube wall of the second tube body is wavy, and the wave extension direction of the tube wall is the circumferential direction of the second tube body.

[0013] The embodiment of the present disclosure provides an assembly method for a fluid conveying pipe, which is used for the above-mentioned fluid conveying pipe, and the assembly method comprises: providing the pipe joint and the connecting assembly. Connecting the first flange of one pipe joint with the second flange of another pipe joint, and making the fluid holes of the first flange and the second flange connected. Inserting the locking head in a contracted state between the first flange and the second flange. Pushing the locking head until the locking head enters the fluid hole and changes to an open state and abuts against the inner wall of the fluid hole. Connecting the first flange and the second flange.

[0014] In one implementation of the present disclosure, providing a pipe joint includes: welding the first end of the second pipe body to the first surface of the first flange. Welding the first end of the first pipe body to the first end of the first reducer ring. Welding the second end of the first reducer ring facing away from the first pipe body to the first surface of the first flange, so that the first pipe body is sleeved outside the second pipe body. Welding the second end of the second pipe body to the first surface of the second flange. Welding the second reducer ring between the second end of the first pipe body and the first surface of the second flange.

[0015] In another implementation of the present disclosure, welding the second reducer ring between the second end of the first tube body and the second flange includes: providing a first half ring and a second half ring constituting the second reducer ring. The first half ring is welded between the second end of the first tube body and the second flange. The second half ring is coaxially connected to the first half ring. The second half ring is welded between the second end of the first tube body and the second flange.

[0016] The technical solution provided by the embodiments of the present disclosure brings the following beneficial effects:

[0017] The internal space of the second tube body is a liquid cargo cavity. Because the first tube body is sleeved outside the second tube body, a gap is formed between the inner wall of the first tube body and the outer wall of the second tube body, and the gap is a heat preservation cavity. Among them, the liquid cargo cavity is used to transport liquid cargo, and the heat preservation cavity is used to transport heat preservation medium. Therefore, the heat preservation of liquid cargo can be achieved by heat exchange with the liquid cargo in the liquid cargo cavity through the heat preservation medium in the heat preservation cavity. In addition, because the first flange and the second flange both have fluid holes, and the fluid holes are connected to the aforementioned heat preservation cavity, and the center holes of the first flange and the second flange are both connected to the aforementioned liquid cargo cavity, the connection of multiple pipe sections can be achieved by connecting the first flange and the second flange, the heat preservation medium flows in each pipe section through the fluid holes, and the liquid cargo flows in each pipe section through the center holes of the first flange and the second flange, thereby realizing long-distance fluid transportation. Furthermore, because the baffle plate abuts against the inner walls of the adjacent first flange and the second flange, when the transported fluid flows through the inner walls of the adjacent first flange and the second flange, the baffle plate is squeezed against the inner walls of the adjacent first flange and the second flange by the fluid pressure, thereby increasing the sealing between the adjacent first flange and the second flange and reducing the temperature loss of the transported fluid.

[0018] That is to say, the fluid conveying pipe can reduce the temperature change of the conveyed fluid during long-distance fluid conveying. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is a structural schematic diagram of a fluid delivery pipe provided by an embodiment of the present disclosure;

[0021] Figure 2 is a structural schematic diagram of a fluid delivery pipe provided by an embodiment of the present disclosure;

[0022] Figure 3 is a cross-sectional view of a first flange provided in an embodiment of the present disclosure;

[0023] Figure 4 is a cross-sectional view of another first flange provided by an embodiment of the present disclosure;

[0024] Figure 5 is an assembly diagram of a connection component provided by an embodiment of the present disclosure;

[0025] Figure 6 is a structural schematic diagram of a second diameter reducing ring provided in an embodiment of the present disclosure;

[0026] Figure 7 is a structural schematic diagram of a first flange provided in an embodiment of the present disclosure;

[0027] Figure 8 is a cross-sectional view of a pipe segment provided by an embodiment of the present disclosure;

[0028] Fig. 9 is a flow chart of an assembly method of a fluid delivery pipe provided by an embodiment of the present disclosure;

[0029] Fig.10 It is a flow chart of a method for preparing a pipe segment provided by an embodiment of the present disclosure;

[0030] Fig.11 It is a schematic diagram of a welding process of a pipe joint provided in an embodiment of the present disclosure.

[0031] The symbols in the figure mean the following:

[0032] 10. Pipe joint;

[0033] 101, first tube body; 1011, insulation cavity; 102, second tube body; 1021, liquid cargo cavity; 103, first reducing ring; 104, second reducing ring; 1041, first half ring; 1042, second half ring; 105, first flange; 106, second flange; 1061, sealing groove; 107, fluid hole; 108, boss; 1081, first boss surface; 1082, second boss surface; 1083, third boss surface; 1084, fourth boss surface; 109, slot; 110, first connecting ring; 111, second connecting ring;

[0034] 20. Connect components;

[0035] 201, connecting rod; 2011, rod body; 2012, rod cavity; 202, baffle; 203, locking head; 2031, marble; 2032, spring. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0037] Figure 1 is a schematic diagram of the structure of a fluid delivery pipe provided by an embodiment of the present disclosure, such as Figure 1 As shown, the embodiment of the present disclosure provides a fluid conveying pipe, including a pipe joint 10 and a connecting assembly 20. The pipe joint 10 includes a first pipe body 101, a second pipe body 102, a first reducer ring 103, a second reducer ring 104, a first flange 105, and a second flange 106. The first pipe body 101 is sleeved outside the second pipe body 102. The first end of the first pipe body 101 is connected to the first end of the first reducer ring 103, the second end of the first pipe body 101 is connected to the first end of the second reducer ring 104, the second end of the first reducer ring 103 and the first end of the second pipe body 102 are respectively connected to the first surface of the first flange 105, the second end of the second reducer ring 104 and the second end of the second pipe body 102 are respectively connected to the first surface of the second flange 106, and the first flange 105 and the second flange 106 both have a fluid hole 107, and the fluid hole 107 is connected to the gap between the inner wall of the first pipe body 101 and the outer wall of the second pipe body 102. The connecting assembly 20 includes a connecting rod 201, a baffle 202 and a locking head 203. The connecting rod 201 is clamped between the second surfaces of two adjacent first flanges 105 and second flanges 106. The baffle 202 is connected to the first end of the connecting rod 201, and the baffle 202 is abutted against the inner walls of the adjacent first flanges 105 and second flanges 106. The locking head 203 is connected to the second end of the connecting rod 201. When the locking head 203 is located at the fluid hole 107, the locking head 203 changes from a contracted state to an open state and abuts against the inner wall of the fluid hole 107.

[0038] The inner space of the second tube body 102 is a liquid cargo cavity 1021. Because the first tube body 101 is sleeved outside the second tube body 102, a gap is formed between the inner wall of the first tube body 101 and the outer wall of the second tube body 102, and the gap is a heat preservation cavity 1011. The liquid cargo cavity 1021 is used to transport liquid cargo, and the heat preservation cavity 1011 is used to transport heat preservation medium. Therefore, the heat preservation medium in the heat preservation cavity 1011 can be used to heat the liquid cargo in the liquid cargo cavity 1021 to achieve heat preservation of the liquid cargo. Since the first flange 105 and the second flange 106 both have fluid holes 107, and the fluid holes 107 are connected to the aforementioned heat preservation chamber 1011, and the center holes of the first flange 105 and the second flange 106 are both connected to the aforementioned liquid cargo chamber 1021, the connection of multiple pipe sections 10 can be realized by connecting the first flange 105 and the second flange 106, the heat preservation medium flows in each pipe section 10 through the fluid holes 107, and the liquid cargo flows in each pipe section 10 through the center holes of the first flange 105 and the second flange 106, thereby realizing long-distance fluid transportation. Since the baffle 202 abuts against the inner walls of the adjacent first flange 105 and the second flange 106, when the transported fluid flows through the inner walls of the adjacent first flange 105 and the second flange 106, the baffle 202 is subjected to the fluid pressure and squeezes the inner walls of the adjacent first flange 105 and the second flange 106, thereby increasing the sealing between the adjacent first flange 105 and the second flange 106.

[0039] That is to say, the fluid conveying pipe can reduce the temperature change of the conveyed fluid during long-distance fluid conveying.

[0040] Figure 2 is a schematic diagram of the structure of a fluid delivery pipe provided by an embodiment of the present disclosure, combined with Figure 2 In this embodiment, the central holes of the first flange 105 and the second flange 106 are both connected to the liquid cargo cavity 1021 in the inner wall of the second tube body 102. There are multiple fluid holes 107 on the first flange 105 and the second flange 106, and the multiple fluid holes 107 are arranged along the circumference of the first flange 105 or the second flange 106, and each fluid hole 107 is connected to the heat preservation cavity 1011.

[0041] It is worth noting that the connection assembly 20 also has multiple fluid holes 107, and the connection assembly 20 has a one-to-one correspondence with the multiple fluid holes 107.

[0042] See again Figure 1 In this embodiment, the inner walls of the first flange 105 and the second flange 106 are both provided with bosses 108. The baffle 202 is attached to the outside of the bosses 108 with one side facing the inner walls of the first flange 105 and the second flange 106.

[0043] Because the inner walls of the first flange 105 and the second flange 106 are both provided with bosses 108, when the baffle 202 abuts against the inner walls of the adjacent first flange 105 and the second flange 106, the baffle 202 is tightly attached to the bosses 108 of the adjacent first flange 105 and the second flange 106, so that when the transported liquid cargo flows through the adjacent first flange 105 and the second flange 106, the baffle 202 is pressed against the bosses 108 by the pressure of the liquid cargo, so that the first flange 105 and the second flange 106 are forced to gather together and close together, thereby improving the sealing performance of the fluid conveying pipe.

[0044] Exemplarily, the boss 108 is a continuous structural member, that is, the boss 108 is annular and extends circumferentially along the inner wall of the first flange 105 or the second flange 106 .

[0045] The boss 108 arranged in a circular shape can be more conveniently fitted with the baffle 202 .

[0046] Figure 3 is a cross-sectional view of a first flange 105 provided in an embodiment of the present disclosure. The structure of the second flange 106 is consistent with that of the first flange 105. Figure 3 As shown, exemplarily, the boss 108 is an annular body with four sides, and the boss 108 includes a first boss surface 1081, a third boss surface 1083, a second boss surface 1082 and a fourth boss surface 1084 connected in sequence, the first boss surface 1081 of the boss 108 is connected to the inner wall of the first flange 105 or the second flange 106, the second boss surface 1082 of the boss 108 is parallel to the second surface of the first flange 105 or the second flange 106, the third boss surface 1083 and the fourth boss surface 1084 of the boss 108 are both located between the first boss surface 1081 and the second boss surface 1082, and the third boss surface 1083 and the fourth boss surface 1084 are both connected to the inner wall of the first flange 105 or the second flange 106.

[0047] Because the three-sided annular baffle 202 forms an angle with the inner walls of the connected first flange 105 and second flange 106, when the transported liquid cargo flows through the adjacent first flange 105 and second flange 106, the direction of the liquid cargo pressure force on the baffle 202 can be toward between the adjacent first flange 105 and second flange 106, and the first flange 105 and second flange 106 are forced to gather together and close together, thereby increasing the sealing performance and reducing the temperature loss during the liquid cargo transportation process.

[0048] Figure 4 is a cross-sectional view of another first flange 105 provided in an embodiment of the present disclosure, and the structure of the second flange 106 is consistent with that of the first flange 105. Figure 4As shown, in other embodiments, there are four bosses 108 , which are arranged circumferentially and spaced apart along the inner wall of the center hole of the first flange 105 or the second flange 106 , and the four bosses 108 correspond one-to-one to the four fluid holes 107 .

[0049] Because the four bosses 108 are arranged discontinuously along the inner wall of the central hole of the first flange 105 or the second flange 106 in the circumferential direction, the gaps between the four bosses 108 can reduce the impact on the flow rate of liquid cargo in the liquid cargo cavity 1021 during transportation.

[0050] Continue to see Figure 1 In this embodiment, the second surfaces of the first flange 105 and the second flange 106 each have a slot 109. The slots 109 of two adjacent first flanges 105 and second flanges 106 are arranged opposite to each other to form a socket. The connecting rod 201 is inserted into the socket.

[0051] Because the second surfaces of the first flange 105 and the second flange 106 both have a slot 109 , after the adjacent first flanges 105 and second flanges 106 are connected together, the slots 109 of the first flange 105 and the second flange 106 are arranged relative to each other to form a socket for inserting the connection component 20 .

[0052] Continue to see Figure 1 In this embodiment, the locking head 203 is a spherical elastic member, and the inner wall of the locking head 203 is connected to the connecting rod 201. When the locking head 203 is in a contracted state, the inner wall of the locking head 203 is in contact with the connecting rod 201. When the locking head 203 is in an open state, the bottom edge of the locking head 203 is against the inner wall of the fluid hole 107.

[0053] Because the locking head 203 is a spherical elastic member, and the locking head 203 can be contracted to fit with the connecting rod 201, after the adjacent first flange 105 and the second flange 106 are connected, the connecting rod 201 and the locking head 203 can be inserted into the slot 109 between the adjacent first flange 105 and the second flange 106. The locking head 203 passes through the slot 109 and enters the fluid hole 107, and then opens. At this time, the bottom edge of the opened locking head 203 abuts against the inner wall of the fluid hole 107, thereby fixing the connecting assembly 20 in the slot 109 between the adjacent first flange 105 and the second flange 106, so that when the fluid flows in the fluid hole 107, the connecting assembly 20 will not be washed away.

[0054] Figure 5 is an assembly diagram of a connection assembly 20 provided in an embodiment of the present disclosure, such as Figure 5As shown, in another embodiment, the connecting rod 201 includes a rod body 2011 and a rod cavity 2012, the rod cavity 2012 is located in one end of the rod body 2011 close to the fluid hole 107, and the locking head 203 includes two marbles 2031 and a spring 2032. The two marbles 2031 can be slidably inserted into the rod cavity 2012, and the spring 2032 is accommodated in the rod cavity 2012. The two ends of the spring 2032 are respectively connected to the two marbles 2031. When the marbles 2031 are connected with the spring 2032, the two ends of the spring 2032 are respectively connected to the two marbles 2031. When the rod body 2011 is pushed into the slot 109, the two marbles 2031 shrink into the rod cavity 2012 under the pressure of the inner wall of the slot 109, so that the connecting rod 201 can pass through the slot 109. After the two marbles 2031 pass through the slot 109, the inner wall of the slot 109 no longer squeezes the two marbles 2031, so that the two marbles 2031 extend out of the rod cavity 2012 under the action of the spring 2032, and the two extended marbles 2031 are against the inner wall of the fluid hole 107.

[0055] Because the two marbles 2031 can be slidably inserted in the inner cavity of the connecting rod 201, the two marbles 2031 can be passed through the center hole of the first flange 105 or the second flange 106 into the slot 109 and out of the fluid hole 107. When the two marbles 2031 pass through the fluid hole 107, the spring 2032 acts on the two marbles 2031 to extend out of the rod cavity 2012 and become an open state, so that the two extended marbles 2031 are against the inner wall of the fluid hole 107, thereby achieving a locking effect.

[0056] See again Figure 1 In this embodiment, a sealing groove 1061 is provided on the second surface of the second flange 106 . The sealing groove 1061 is arranged circumferentially around the second flange 106 , and the sealing groove 1061 and the fluid hole 107 are spaced apart from each other.

[0057] Because the second surface of the second flange 106 has a sealing groove 1061 , a sealing strip can be installed in the sealing groove 1061 before connecting the adjacent first flange 105 and second flange 106 together, thereby improving the sealing performance of the connected first flange 105 and second flange 106 .

[0058] Figure 6 is a schematic structural diagram of a second diameter reducing ring 104 provided in an embodiment of the present disclosure, such as Figure 6 As shown, in this embodiment, the second diameter reducing ring 104 includes a first half ring 1041 and a second half ring 1042. The inner arc surfaces of the first half ring 1041 and the second half ring 1042 are opposite and coaxially connected.

[0059] Because the second reducer ring 104 is composed of the inner arc surfaces of the first half ring 1041 and the second half ring 1042 facing each other and coaxially connected, in the process of welding the various components of the pipe joint 10, the second end of the first pipe body 101 can be welded to the second flange 106 first, and then the first half ring 1041 and the second half ring 1042 can be separated and welded in sequence between the second end of the second pipe body 102 and the second flange 106. Therefore, each weld can be inspected by radiography without hindrance in sequence.

[0060] Figure 7 1 is a schematic diagram of the structure of a first flange 105 provided in an embodiment of the present disclosure. The structure of the second flange 106 is the same as that of the first flange. Figure 7 As shown, in this embodiment, the first surfaces of the first flange 105 and the second flange 106 are provided with a first connecting ring 110 and a second connecting ring 111. The first connecting ring 110 and the second connecting ring 111 are respectively located on both sides of the fluid hole 107. The first connecting ring 110 is connected to the first reducing ring 103 or the second reducing ring 104, and the second connecting ring 111 is connected to the end of the second pipe body 102 (see Figure 1 ).

[0061] Because the first surface of the first flange 105 has the first connecting ring 110 and the second connecting ring 111, when the first flange 105 is welded to the first reducing ring 103 and the first end of the second tube body 102, the first reducing ring 103 can be welded to the first connecting ring 110 of the first flange 105, and the first end of the second tube body 102 can be welded to the second connecting ring 111 of the first flange 105. Therefore, after the welding between the first flange 105, the second tube body 102 and the first reducing ring 103 is completed, it is convenient to perform radiographic inspection on the weld.

[0062] Because the first surface of the second flange 106 also has the first connecting ring 110 and the second connecting ring 111, when the first flange 105 is welded to the second reducer ring 104 and the second end of the second tube body 102, the second reducer ring 104 can be welded to the first connecting ring 110 of the second flange 106, and the second end of the second tube body 102 can be welded to the second connecting ring 111 of the second flange 106. This facilitates radiographic inspection of the weld after the welding between the second flange 106, the second tube body 102 and the second reducer ring 104 is completed.

[0063] Exemplarily, the first connecting ring 110 on the first surface of the first flange 105 is connected to the first reducing ring 103 by welding, and the first connecting ring 110 on the first surface of the second flange 106 is connected to the second reducing ring 104 by welding. The second connecting ring 111 on the first surface of the first flange 105 is connected to the first end of the second pipe body 102, and the second connecting ring 111 on the first surface of the second flange 106 is connected to the second end of the second pipe body 102.

[0064] Figure 8 is a cross-sectional view of a pipe segment 10 provided in an embodiment of the present disclosure, Figure 8 The cross-sectional direction is Figure 2 AA direction, combined with Figure 8 In this embodiment, the tube wall of the second tube body 102 is wavy, and the wave extension direction of the tube wall is the circumferential direction of the second tube body 102 .

[0065] Because a liquid cargo cavity 1021 for conveying liquid cargo is formed in the inner wall of the second tube body 102, and a heat preservation cavity 1011 is formed between the inner wall of the first tube body 101 and the outer wall of the second tube body 102, the liquid cargo in the liquid cargo cavity 1021 and the heat preservation medium in the heat preservation cavity 1011 both contact the tube wall of the second tube body 102 for heat exchange, so as to achieve the effect of heat preservation of the liquid cargo conveyed in the liquid cargo cavity 1021, so the tube wall of the second tube body 102 is set to be wavy, which increases the contact area between the heat preservation medium in the heat preservation cavity 1011 and the tube wall of the second tube body 102, and can improve the heat preservation effect on the liquid cargo in the liquid cargo cavity 1021. And because the wave extension direction of the tube wall is the circumferential direction of the second tube body 102, the wavy design of the tube wall will not affect the flow rate of the liquid cargo in the liquid cargo cavity 1021.

[0066] Fig. 9 is a flow chart of a method for assembling a fluid delivery pipe provided by an embodiment of the present disclosure, such as Fig. 9 As shown, an embodiment of the present disclosure provides an assembly method of a fluid delivery pipe. The assembly method is based on the above-mentioned fluid delivery pipe and includes:

[0067] S101: Provide a pipe joint 10 and a connection assembly 20.

[0068] S102: docking the first flange 105 of one pipe joint 10 with the second flange 106 of another pipe joint 10, and making the fluid holes 107 of the first flange 105 and the second flange 106 communicate with each other.

[0069] S103 : inserting the locking head 203 in the contracted state between the first flange 105 and the second flange 106 .

[0070] S104 : pushing the locking head 203 until the locking head 203 enters the fluid hole 107 and changes to an open state and abuts against the inner wall of the fluid hole 107 .

[0071] S105 : Connect the first flange 105 and the second flange 106 .

[0072] There are multiple pipe joints 10 and connection components 20 provided, and the adjacent first flanges 105 and second flanges 106 are aligned and connected, and the fluid holes 107 of the first flanges 105 and the second flanges 106 are connected. Then the locking head 203 of the connection component 20 is inserted between the first flange 105 and the second flange 106 from the inner wall side of the second pipe body 102, and the locking head 203 is pushed until the locking head 203 extends to the fluid hole 107 near the outer edge of the first flange 105, and the locking head 203 changes from a contracted state to an open state, so that the locking head 203 abuts against the inner wall of the fluid hole 107, and the baffle 202 also abuts against the inner walls of the adjacent first flange 105 and the second flange 106, thereby completing the assembly of the pipe joint 10 and the connection component 20.

[0073] Exemplarily, the first flange 105 of one pipe section 10 is aligned and fixedly connected with the second flange 106 of another pipe section 10 by means of bolt and nut connection.

[0074] Fig.10 is a flow chart of a method for preparing a pipe segment 10 provided in an embodiment of the present disclosure, such as Fig.10 As shown, the preparation process of the pipe segment 10 includes:

[0075] Step S201: Weld the first end of the second tube 102 to the first surface of the first flange 105. Fig.11 Schematic diagram of a welding process of a pipe segment 10 provided in an embodiment of the present disclosure, such as Fig.11 (shown)

[0076] See again Figure 1 For example, the first end of the second tube body 102 is welded to the first surface of the first flange 105 along the weld a, and the weld a is subjected to radiographic inspection.

[0077] Step S202: Weld the first end of the first tube body 101 to the first end of the first reducer. Fig.11 )

[0078] Continue to see Figure 1 For example, the first end of the first tube body 101 is welded to the first end of the first reducer along the weld b, and the weld b is subjected to radiographic inspection.

[0079] Step S203: Weld the first end of the first reducer 103 facing away from the first tube 101 to the first surface of the first flange 105, so that the first tube 101 is sleeved outside the second tube 102. (See Fig.11 )

[0080] Continue to see Figure 1 For example, the side of the first reducer ring 103 facing away from the first tube body 101 is welded to the first side of the first flange 105 along the weld c, and the weld c is subjected to radiographic inspection.

[0081] Because the weld a located inside the first tube body 101 is first subjected to radiographic inspection, and then the welds b and c located outside the first tube body 101 are subjected to radiographic inspection, the problem that the first flange 105 is directly welded to the first tube body 101 and the second tube body 102 and cannot be subjected to radiographic inspection is avoided.

[0082] Step S204: Weld the second end of the second tube 102 to the first surface of the second flange 106. Fig.11 )

[0083] Continue to see Figure 1 For example, the second end of the second tube body 102 is welded to the first surface of the second flange 106 along the weld d, and the weld d is subjected to radiographic inspection.

[0084] Step S205: The second reducer ring 104 is welded between the second end of the first tube body 101 and the first surface of the second flange 106. Fig.11 )

[0085] Exemplarily, the second reducer ring 104 is welded to the second end of the first tube 101 along the weld e, and the second reducer ring 104 is welded to the first surface of the second flange 106 along the weld f, and the welds e and f are subjected to radiographic inspection.

[0086] Because the weld d located inside the first tube body 101 is first subjected to radiographic inspection, and then the welds e and f located outside the first tube body 101 are subjected to radiographic inspection, the problem that the second flange 106 is directly welded to the first tube body 101 and the second tube body 102 and cannot be subjected to radiographic inspection is avoided.

[0087] Continue to see Fig.11 , exemplarily, step S205 is implemented by the following steps.

[0088] Step S2051: providing a first half ring 1041 and a second half ring 1042 constituting a second diameter reducing ring 104;

[0089] Step S2052 : The first half ring 1041 is welded between the second end of the first tube body 101 and the second flange 106 .

[0090] Step S2053: coaxially connect the second half ring 1042 and the first half ring 1041 .

[0091] Step S2054 : The second half ring 1042 is welded between the second end of the first tube body 101 and the second flange 106 .

[0092] Because the second end of the second tube body 102 and the second flange 106 are first welded together, and the weld is inspected by radiography, then the second reducer ring 104 is welded between the second end of the first tube body 101 and the second flange 106, and the welds e and f are inspected by radiography, the radiography inspection of each weld can be completed without hindrance.

[0093] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A fluid delivery pipe, characterized in that: It comprises a pipe joint (10) and a connecting assembly (20); The pipe joint (10) comprises a first pipe body (101), a second pipe body (102), a first reducing ring (103), a second reducing ring (104), a first flange (105) and a second flange (106); the first pipe body (101) is sleeved outside the second pipe body (102); a first end of the first pipe body (101) is connected to a first end of the first reducing ring (103); a second end of the first pipe body (101) is connected to a first end of the second reducing ring (104); the first reducing ring (103) is connected to a first end of the second reducing ring (104); ) and the first end of the second tube body (102) are respectively connected to the first surface of the first flange (105), the second end of the second reducer ring (104) and the second end of the second tube body (102) are respectively connected to the first surface of the second flange (106), the first flange (105) and the second flange (106) both have a fluid hole (107), and the fluid hole (107) is connected to the gap between the inner wall of the first tube body (101) and the outer wall of the second tube body (102); The connecting assembly (20) comprises a connecting rod (201), a baffle (202) and a locking head (203); the connecting rod (201) is clamped between the second surfaces of two adjacent first flanges (105) and second flanges (106); the baffle (202) is connected to the first end of the connecting rod (201), and the baffle (202) abuts against the inner walls of the adjacent first flanges (105) and second flanges (106); the locking head (203) is connected to the second end of the connecting rod (201); when the locking head (203) is located at the fluid hole (107), the locking head (203) changes from a contracted state to an open state and abuts against the inner wall of the fluid hole (107).

2. The fluid delivery pipe according to claim 1, characterized in that: The inner walls of the first flange (105) and the second flange (106) are both provided with bosses (108); The baffle (202) is disposed on the outside of the boss (108) with one side thereof facing the inner walls of the first flange (105) and the second flange (106).

3. The fluid delivery pipe according to claim 1, characterized in that: The locking head (203) is a spherical crown-shaped elastic member, and the inner wall of the locking head (203) is connected to the connecting rod (201). When the locking head (203) is in a contracted state, the inner wall of the locking head (203) is in contact with the connecting rod (201); when the locking head (203) is in an open state, the bottom edge of the locking head (203) is in contact with the inner wall of the fluid hole (107).

4. The fluid delivery pipe according to claim 1, characterized in that: The second surfaces of the first flange (105) and the second flange (106) both have a slot (109); The slots (109) of two adjacent first flanges (105) and second flanges (106) are arranged opposite to each other to form a plug hole; The connecting rod (201) is inserted into the insertion hole.

5. The fluid delivery pipe according to claim 1, characterized in that: The second reducing ring (104) comprises a first half ring (1041) and a second half ring (1042); The inner arc surfaces of the first half ring (1041) and the second half ring (1042) are opposite to each other and coaxially connected.

6. The fluid delivery pipe according to claim 1, characterized in that: The first surfaces of the first flange (105) and the second flange (106) both have a first connecting ring (110) and a second connecting ring (111); The first connecting ring (110) and the second connecting ring (111) are respectively located on two sides of the fluid hole (107); The first connecting ring (110) is connected to the first reducing ring (103) or the second reducing ring (104); The second connecting ring (111) is connected to the end of the second tube body (102).

7. The fluid delivery pipe according to claim 1, characterized in that: The tube wall of the second tube body (102) is wavy, and the wave extension direction of the tube wall is the circumferential direction of the second tube body (102).

8. A method for assembling a fluid delivery pipe, characterized in that: The assembly method of the fluid delivery pipe is used for the fluid delivery pipe according to any one of claims 1 to 7, and the assembly method comprises: Providing the pipe joint (10) and the connecting assembly (20); The first flange (105) of one pipe joint (10) is butted against the second flange (106) of another pipe joint (10), and the fluid holes (107) of the first flange (105) and the second flange (106) are connected; Inserting the locking head (203) in a contracted state between the first flange (105) and the second flange (106); Pushing the locking head (203) until the locking head (203) enters the fluid hole (107) and then changes to an open state and abuts against the inner wall of the fluid hole (107); The first flange (105) and the second flange (106) are connected.

9. The method for assembling a fluid delivery pipe according to claim 8, characterized in that: The pipe joint (10) includes: Welding the first end of the second tube (102) to the first surface of the first flange (105); Welding the first end of the first tube body (101) to the first end of the first reducing ring (103); Welding the second end of the first reducing ring (103) facing away from the first tube body (101) to the first surface of the first flange (105), so that the first tube body (101) is sleeved outside the second tube body (102); Welding the second end of the second tube (102) to the first surface of the second flange (106); The second reducing ring (104) is welded between the second end of the first tube body (101) and the first surface of the second flange (106).

10. The method for assembling a fluid delivery pipe according to claim 9, characterized in that: The second reducing ring (104) is welded between the second end of the first tube body (101) and the second flange (106), comprising: Providing a first half ring (1041) and a second half ring (1042) constituting the second reducing ring (104); The first half ring (1041) is welded between the second end of the first tube body (101) and the second flange (106); Connecting the second half ring (1042) and the first half ring (1041) coaxially; The second half ring (1042) is welded between the second end of the first tube body (101) and the second flange (106).

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