Sealing connection device for composite pressure-resistant pipe shell

Abstract

The invention provides a sealing connecting device for a composite pressure-resistant pipe shell, and relates to a sealing connecting device, the sealing connecting device comprises pipe shell bodies and a connecting part used for realizing butt joint of pipe ends of the adjacent pipe shell bodies, a butt joint gap is formed between the pipe ends of the adjacent pipe shell bodies, and after the pipe shell bodies are positioned and installed, the connecting part is positioned at the butt joint gap; the connecting part comprises a bottom plate, a platform plate, a base block, a hoop block and a butt joint embracing pipe; the end portions of the tube shell bodies are further connected with sealing portions in a guiding mode in the axial direction, the sealing portions between the tube ends of the adjacent tube shell bodies are installed at the two ends of the butt joint embracing tube in a reverse screw joint mode, and abutting sealing rings for butt joint sealing are further arranged at the end portions of the sealing portions. And meanwhile, local pipe cutting or complex disassembly and assembly operation can be not needed, replacement and maintenance operation of the local pipe shell can be completed, the butt joint flexibility and adaptability are good, and the automation degree of butt joint installation is higher.

Description

Technical Field

[0001] The invention relates to a sealing connection device, in particular to a sealing connection device for a composite material pressure-resistant tube shell. Background Art

[0002] Composite pressure-resistant shell is a shell made of two or more different materials. It is generally made by combining the characteristics of different materials to meet various specific engineering needs. For example, one material is used as the matrix and another material is used as the reinforcement. The various materials complement each other in performance and produce a synergistic effect, making it pressure-resistant, corrosion-resistant and high-strength. Therefore, it is widely used in the fields of automobiles, energy, and chemicals. For the specific structural design of the composite pressure-resistant tube shell, especially for the sealing connection structure that can achieve the docking of two groups of tube shells, the prior art can be designed as shown in the patent for the docking structure between the ports of the deformable plastic composite pressure-resistant tube (Announcement No. CN114542840B), but although it can achieve a detachable effect, in actual application, it can only meet the sequential docking, installation and disassembly of the composite pressure-resistant tube shell. When it is necessary to perform local maintenance and replacement in the middle of the tube shell, the distance between the ends of the pressure-resistant tube shell that has been installed has been determined when the known composite pressure-resistant tube shell has been positioned and installed. Different pressure-resistant tube shells may also have different docking gaps at the tube ends due to different actual installation conditions, thereby resulting in different structural lengths for realizing the connection of the tube ends. At this time, if local maintenance and replacement are performed again, pipe cutting or complex disassembly operations are required, which is time-consuming and labor-intensive. If the tube shell can only be sequentially docked, installed, positioned or disassembled during installation, it is difficult to achieve batch operation and more flexible and automated operations. Therefore, the actual docking operation efficiency is also very low, and the docking convenience is also poor. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a sealing connection device for a composite pressure-resistant tube shell, so that it can adapt to the situation where the tube shell is positioned first and then the tube shell is docked. At this time, the installation of the tube shell can be arranged and positioned in advance, and at the same time, there is no need to perform local tube cutting or complicated disassembly and assembly operations to complete the replacement and maintenance operations of the local tube shell. The docking flexibility and adaptability are better, and the degree of automation of the docking installation is also higher.

[0004] The present invention provides the following technical solutions: A sealing connection device for a composite pressure-resistant tube shell, comprising a tube shell body and a connection part for achieving butt joint of tube ends of adjacent tube shell bodies, wherein a butt joint gap is provided between the tube ends of adjacent tube shell bodies, and after the tube shell body is positioned and installed, the connection part is positioned at the butt joint gap; The connecting part includes a base plate fixedly arranged at the butt joint gap, a platform plate guide mounted on the base plate and driven to rise and fall by a jacking cylinder, a base block slidably mounted on the platform plate, a clamping block positioned on the base block, and a butt joint holding tube placed in an arc groove at the top of the clamping block; the outer periphery of the butt joint holding tube is provided with two sets of swivels installed in the arc groove, so that the butt joint holding tube can be positioned axially relative to the clamping block through the connection of the swivel and the arc groove, and two sets of guide blocks are sleeved at both ends of the base block in the direction of the ends of the two adjacent sets of tube shell bodies, and a set of locking blocks are respectively vertically positioned at the ends of the guide blocks, and at least one set of screw rods is screwed through the two sets of guide blocks, which are installed in the base block and driven to rotate by a driving motor to drive the two sets of guide blocks to drive the locking blocks to move in the opposite direction, and the two sets of locking blocks are symmetrically distributed about the clamping block, and a clamping part for axially limiting at the end of the tube shell body is also provided thereon; The ends of the tube shell bodies are also connected with sealing parts along the axial guide, and the sealing parts between the tube ends of adjacent tube shell bodies are reversely screwed and installed at the two ends of the butt-jointed tubes, and the ends of the sealing parts are also provided with abutting sealing rings for butt-jointed sealing; That is, when it is necessary to disassemble a part of the tube shell body, it is necessary to disassemble the connection part between the adjacent tube shell bodies first. When disassembling the connection part, it is only necessary to rotate the docking tube to make the sealing part move away from each other, and when the sealing part is out of the two ends of the docking tube, the connection part can be removed as a whole, and when the replacement is completed and a new installation docking is performed, the new connection part can be directly positioned at the docking gap, and the new docking tube can be ensured to be positioned in the middle of the two groups of tube shell bodies by controlling the lifting and lowering of the platform plate and the rotation of the screw rod. At this point, when the docking tube is rotated to make the sealing part re-enter the docking tube for docking sealing, it can be ensured that they can abut against each other to improve the sealing effect.

[0005] Preferably, the radial cross-section of the swivel is T-shaped, so that it can be clamped in the clamp block while being transferred, and a group of outer gear rings are provided between the two groups of swivels, and the clamp block is provided with an outer gear 2 for meshing with the outer gear ring, and the outer gear 2 is driven and connected to the driving motor 2 on the clamp block, so that the rotation and positioning of the docking pipe can be automatically controlled.

[0006] Preferably, a conical ring-shaped clamping block is further provided at the end of the tube shell body, and the clamping portion includes a semicircular notch matched with the outside of the tube shell body, and an end of the semicircular notch close to the butt-jointed tube is also provided with an inclined surface matched with the conical surface of the clamping block. After the semicircular notch is engaged with the outside of the tube shell body, the screw rod is started to rotate, so that the two groups of locking blocks move toward each other, and the movement is paused until the inclined surfaces on the two groups of locking blocks are all in contact with the conical surface of the clamping block, thereby completing the positioning of the butt-jointed tube relative to the two adjacent groups of tube shell bodies, and the butt-jointed tube is positioned in the middle of the two adjacent groups of tube shell bodies; That is, the specific positioning steps are: after the tube shell body is positioned and installed, the bottom plate is roughly positioned at the docking gap, and then the screw rod is started to move, so that the two groups of guide blocks and locking blocks move back to back, and when the locking block moves to the bottom of the tube shell body, it stops, and then the lifting cylinder is started to lift the platform plate, so that the slot is matched outside the tube shell body, and the screw rod is started again, so that the two groups of guide blocks and locking blocks move toward each other, and when the inclined surface on one group of locking blocks is connected with the conical surface of the card block, the screw rod is continued to be rotated at this time, which can drive the base block to slide relative to the platform plate, and the platform plate moves toward the side of the locking block that has completed the docking, and at the same time, the clamp block and the docking clamping pipe thereon also move synchronously until the inclined surface on the other group of locking blocks is connected with the conical surface of the card block, then the positioning of the docking clamping pipe relative to the two adjacent groups of tube shell bodies is completed. At this time, it can be ensured that the docking clamping pipe is positioned in the middle position of the two adjacent groups of tube shell bodies.

[0007] Preferably, the sealing portion includes a sealing tube connected to the tube shell body along the axial guide, the end of the sealing tube facing away from the docking tube is outwardly flared, and the end of the tube shell body is also provided with an annular sealing protrusion which abuts and limits the flared outer wall of the sealing tube, and when the sealing tubes at the adjacent tube shell body ends are abutted and sealed, the flared outer wall of the sealing tube is sealed and abutted against the annular sealing protrusion.

[0008] Preferably, a sealing pressure pad for abutment sealing is provided between the flared outer wall of the sealing tube and the annular sealing protrusion, so as to improve the sealing effect during abutment.

[0009] Preferably, two groups of shaft rods are symmetrically connected to the flared outer wall of the sealing tube. The shaft rods are parallel to the axial direction of the tube shell body and pass through the annular sealing protrusions distributed on both sides of the docking tube. At this time, the shaft rods have the effect of achieving axial guidance of the sealing tube.

[0010] Preferably, the extension length of the shaft rod is slightly shorter than the tube end of the sealing tube. At this point, the threaded position of the sealing tube in the docking tube can be judged from the outside by the position of the shaft rod. At the same time, it is also convenient to continue to push the sealing tube into the tube shell body through the shaft rod when the sealing tube escapes from the docking tube, thereby leaving installation avoidance space for the connection part.

[0011] Preferably, a group of limit plates are also provided at the end of the shaft rod, and a limit spring is connected between the limit plate and the end side of the tube shell body. Therefore, when the end of the sealing tube is initially threadedly connected with the docking tube, the sealing tube can be abutted against the tube mouth of the docking tube by the pressure of the spring, thereby eliminating the need for manual pushing, which saves time and effort.

[0012] The beneficial effects of the present invention are: In a sealing connection device for a composite material pressure-resistant tube shell of the present invention, it can adapt to the situation that the tube shell is positioned first and then the tube shell is butted. At this time, the installation of the tube shell can be arranged and positioned in advance, that is, the batch installation and positioning operation of all tube shells can be completed in advance, and then the batch butt operation can be performed on the basis of the positioned tube shells, which can not only improve the butt connection efficiency, but also be more convenient. At the same time, it is also possible to complete the replacement and maintenance operation of the local tube shell without performing local tube cutting or complicated disassembly and assembly operations. The flexibility and adaptability of the butt connection are better, and the degree of automation of the butt connection installation is also higher; 2 When it is necessary to disassemble a part of the tube shell body, it is necessary to disassemble the connection part between the adjacent tube shell bodies first. When disassembling the connection part, it is only necessary to rotate the butt-holding tube to make the sealing part move in opposite directions. When the sealing part is out of the two ends of the butt-holding tube, the connection part can be removed as a whole. When the replacement is completed and a new installation is carried out, the new connection part can be directly positioned at the butt-holding gap. By controlling the lifting and lowering of the platform plate and the rotation of the screw rod, it is ensured that the new butt-holding tube is positioned in the middle of the two groups of tube shell bodies. At this point, when the butt-holding tube is rotated to make the sealing part enter the butt-holding tube again for butt-sealing, it can be ensured that they can abut against each other to improve the sealing effect. The specific positioning step of the device of the present invention is that after the tube shell body is positioned and installed, the bottom plate is roughly positioned at the docking gap, and then the screw rod is started to move, so that the two groups of guide blocks and the locking block move back to each other, and when the locking block moves to the bottom of the tube shell body, it stops, and then the lifting cylinder is started to lift the platform plate, so that the card slot is matched outside the tube shell body, and then the screw rod is started to make the two groups of guide blocks and the locking block move towards each other, when the inclined surface on one group of locking blocks is in contact with the conical surface of the card block, the screw rod is continued to rotate at this time, so that the base block can be driven to slide relative to the platform plate, and the platform plate moves toward the side of the locking block that completes the docking, and at the same time, the hoop block and the docking clamping pipe thereon also move synchronously, until the inclined surface on the other group of locking blocks is in contact with the conical surface of the card block, then the positioning of the docking clamping pipe relative to the two adjacent groups of tube shell bodies is completed, and at this time, it can be ensured that the docking clamping pipe is positioned at the middle position of the two adjacent groups of tube shell bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 This is a main structural cross-sectional view of two sets of tube shell bodies before docking in the present invention; Figure 2 It is a set of main structural sectional views of the tube ends of the tube shell body; Figure 3 It is a schematic diagram of the main structure of the connection part; Figure 41 is a schematic diagram of the side structure of the locking block; Figure 5 It is a side view structural diagram of the butt-jointed clamping pipe placed on the clamping hoop block; Markings in the figure: 1. Shell body; 2. Connecting part; 3. Sealing part; 4. Abutting sealing ring; 11. Block; 12. Conical surface; 21. Bottom plate; 22. Platform plate; 23. Base block; 24. Clamp block; 25. Docking clamp; 26. Swivel; 27. Guide block; 28. Locking block; 29. ​​Screw; 210. Drive motor 1; 211. External gear ring; 212. External gear 2; 213. Drive motor 2; 214. Lifting cylinder; 215. Inclined surface; 216. External gear 1; 217. Transfer gear; 218. Semicircular notch; 31. Sealing tube; 32. Annular sealing protrusion; 33. Sealing pressure pad; 34. Shaft; 35. Limit plate; 36. Limit spring. DETAILED DESCRIPTION

[0014] Example 1 like Figure 1-5 As shown, a sealing connection device for a composite pressure-resistant tube shell, in this embodiment, comprises a tube shell body 1 and a connecting portion 2 for achieving butt joint of tube ends of adjacent tube shell bodies 1, a butt joint gap is provided between the tube ends of adjacent tube shell bodies 1, and after the tube shell body 1 is positioned and installed, the connecting portion 2 is positioned at the butt joint gap; The connecting part 2 includes a bottom plate 21 fixedly arranged at the butt joint gap, a platform plate 22 guidedly mounted on the bottom plate 21 and driven to rise and fall by a lifting cylinder 214, a base block 23 slidably mounted on the platform plate 22, a clamp block 24 positioned on the base block 23, and a butt joint holding tube 25 placed in the arc groove at the top of the clamp block 24; the outer periphery of the butt joint holding tube 25 is provided with two groups of swivels 26 installed in the arc groove, so that the butt joint holding tube 25 can be positioned relative to the clamp block 24 in the axial direction through the connection between the swivel 26 and the arc groove, and the two ends of the base block 23 are facing the ends of the two adjacent groups of tube shell bodies 1. Two sets of guide blocks 27 are sleeved in the upper direction, and a set of locking blocks 28 are vertically positioned at the ends of the guide blocks 27, respectively. At least one set of screw rods 29 are screwed through the two sets of guide blocks 27, and the adapter is installed in the base block 23, and is driven by a driving motor 210 to rotate to drive the two sets of guide blocks 27 to drive the locking blocks 28 to move in the opposite direction. The two sets of locking blocks 28 are symmetrically distributed about the hoop block 24, and a clamping portion for axially limiting at the end of the tube shell body 1 is also provided thereon. The driving motor 210 is arranged and installed on the base block 23, and it is meshed and driven by an external gear 216 at the driving end and a transfer gear 217 outside the screw rod 29; The end of the tube shell body 1 is also connected with a sealing part 3 along the axial guide. The sealing parts 3 between the tube ends of adjacent tube shell bodies 1 are reversely screwed and installed on both ends of the butt-jointed tube 25. The ends of the sealing parts 3 are also provided with a butt-jointed sealing ring 4. That is, when it is necessary to disassemble a part of the tube shell body 1, it is necessary to first disassemble the connecting part 2 between the adjacent tube shell bodies 1. When disassembling the connecting part 2, it is only necessary to rotate the docking tube 25 so that the sealing part 3 moves in opposite directions. When the sealing part 3 is out of the two ends of the docking tube 25, the connecting part 2 can be removed as a whole. When the replacement is completed and a new installation docking is performed, the new connecting part 2 can be directly positioned at the docking gap. By controlling the lifting and lowering of the platform plate 22 and the rotation of the screw rod 29, it is ensured that the new docking tube 25 is positioned in the middle of the two groups of tube shell bodies 1. At this point, when the docking tube 25 is rotated so that the sealing part 3 enters the docking tube 25 again for docking sealing, it can be ensured that they can abut against each other to improve the sealing effect.

[0015] The radial cross-section of the swivel 26 is T-shaped, so that it can be clamped in the clamp block 24 while being switched, and a group of outer gear rings 211 are also provided between the two groups of swivels 26, and an outer gear 212 for meshing with the outer gear ring 211 is installed on the clamp block 24, and the outer gear 212 is driven and connected to the drive motor 213 on the clamp block 24. At this point, the rotation and positioning of the docking clamp 25 can be automatically controlled.

[0016] The end of the tube shell body 1 is also provided with a block 11 with a conical surface 12 in an annular shape. The clamping portion includes a semicircular notch 218 matched with the outside of the tube shell body 1. The end of the semicircular notch 218 close to the butt-jointed tube holder 25 is also provided with an inclined surface 215 butt-jointed with the conical surface 12 of the block 11. After the semicircular notch 218 is held outside the tube shell body 1, the screw rod 29 is started to rotate, so that the two groups of locking blocks 28 move toward each other, and the movement is paused until the inclined surfaces 215 on the two groups of locking blocks 28 are both butt-jointed with the conical surface 12 of the block 11, thereby completing the positioning of the butt-jointed tube holder 25 relative to the two adjacent groups of tube shell bodies 1, and the butt-jointed tube holder 25 is positioned in the middle of the two adjacent groups of tube shell bodies 1. That is, the specific positioning steps are as follows: after the tube shell body 1 is positioned and installed, the bottom plate 21 is roughly positioned at the docking gap, and then the screw rod 29 is started to move, so that the two groups of guide blocks 27 and the locking block 28 move in opposite directions, and when the locking block 28 moves to the bottom of the tube shell body 1, it stops, and then the lifting cylinder 214 is started to lift the platform plate 22, so that the card slot is matched outside the tube shell body 1, and then the screw rod 29 is started again, so that the two groups of guide blocks 27 and the locking block 28 move toward each other, when the inclined surface 215 on one group of locking blocks 28 is aligned with the conical surface of the card block 11, the bottom plate 21 is roughly positioned at the docking gap, and then the screw rod 29 is started to move, so that the two groups of guide blocks 27 and the locking block 28 move in opposite directions, and ... the one group of locking blocks 28 is aligned with the conical surface of the card block 11, the bottom plate 22 is moved in opposite directions. When the surfaces 12 are docked, the screw rod 29 continues to rotate, which can drive the base block 23 to slide relative to the platform plate 22, and the platform plate 22 moves toward the side of the locking block 28 that has completed the docking. At the same time, the clamp block 24 and the docking tube clamp 25 thereon also move synchronously until the inclined surface 215 on the other set of locking blocks 28 docks with the conical surface 12 of the clamping block 11, thereby completing the positioning of the docking tube clamp 25 relative to the two adjacent groups of tube shell bodies 1. At this time, it can be ensured that the docking tube clamp 25 is positioned in the middle position of the two adjacent groups of tube shell bodies 1.

[0017] The sealing portion 3 includes a sealing tube 31 connected to the tube shell body 1 along the axial direction. The end of the sealing tube 31 away from the docking tube 25 is outwardly expanded. The end of the tube shell body 1 is also provided with an annular sealing protrusion 32 that abuts and limits the expanded outer wall of the sealing tube 31. When the sealing tubes 31 at the tube ends of adjacent tube shell bodies 1 abut and seal, the expanded outer wall of the sealing tube 31 is sealed and abutted against the annular sealing protrusion 32.

[0018] Two sets of shaft rods 34 are symmetrically connected to the flared outer wall of the sealing tube 31. The shaft rods 34 are parallel to the axial direction of the tube shell body 1 and pass through the annular sealing protrusions 32 and are distributed on both sides of the docking tube 25. At this time, the shaft rods 34 have the effect of achieving axial guidance of the sealing tube 31.

[0019] Example 2 A sealing connection device for a composite pressure-resistant tube shell. In this embodiment, it is further limited on the basis of embodiment 1. A sealing pressure pad 33 for abutment sealing is provided between the flared outer wall of the sealing tube 31 and the annular sealing protrusion 32 to improve the sealing effect during abutment.

[0020] The extended length of the shaft rod 34 is slightly shorter than the tube end of the sealing tube 31. At this point, the threaded position of the sealing tube 31 in the docking tube 25 can be judged from the outside through the position of the shaft rod 34. At the same time, it is also convenient to continue to push the sealing tube 31 into the tube shell body 1 through the shaft rod 34 when the sealing tube 31 escapes from the docking tube 25, thereby leaving installation avoidance space for the connecting part 2.

[0021] A set of limit plates 35 are also provided at the end of the shaft rod 34, and a limit spring 36 is connected between the limit plate 35 and the end side of the tube shell body 1. Therefore, when the end of the sealing tube 31 is initially screwed with the docking tube 25, the sealing tube 31 can be abutted against the tube mouth of the docking tube 25 by the pressure of the spring, thereby eliminating the need for manual pushing, which saves time and effort.

[0022] The working principle of the present invention is as follows: in a sealing connection device for a composite material pressure-resistant tube shell of the present invention, it can adapt to the situation that the tube shell is positioned first and then the tube shell is butted. At this time, the installation of the tube shell can be arranged and positioned in advance, that is, the batch installation and positioning operation of all tube shells can be completed in advance, and then the batch butt operation can be performed on the basis of the positioned tube shells, which can not only improve the butt connection efficiency, but also be more convenient. At the same time, it is also possible to complete the replacement and maintenance operation of the local tube shell without performing local tube cutting or complicated disassembly and assembly operations. The flexibility and adaptability of the butt connection are better, and the degree of automation of the butt connection installation is also higher. When it is necessary to disassemble a part of the tube shell body 1, it is necessary to first disassemble the connecting part 2 between the adjacent tube shell bodies 1. When disassembling the connecting part 2, it is only necessary to rotate the docking tube 25 so that the sealing part 3 moves in opposite directions. When the sealing part 3 is separated from the two ends of the docking tube 25, the connecting part 2 can be removed as a whole. When the replacement is completed and a new installation is performed, the new connecting part 2 can be directly positioned at the docking gap. By controlling the lifting and lowering of the platform plate 22 and the rotation of the screw rod 29, it is ensured that the new docking tube 25 is positioned in the middle of the two groups of tube shell bodies 1. At this point, when the docking tube 25 is rotated so that the sealing part 3 enters the docking tube 25 again for docking sealing, it can be ensured that they can abut against each other to improve the sealing effect. The specific positioning steps of the device of the present invention are as follows: after the tube shell body 1 is positioned and installed, the bottom plate 21 is roughly positioned at the docking gap, and then the screw rod 29 is started to move, so that the two groups of guide blocks 27 and the locking block 28 move in opposite directions, and when the locking block 28 moves to the bottom of the tube shell body 1, it stops, and then the lifting cylinder 214 is started to lift the platform plate 22, so that the card slot is matched outside the tube shell body 1, and then the screw rod 29 is started again, so that the two groups of guide blocks 27 and the locking block 28 move in opposite directions, when the inclined surface 215 on one group of locking blocks 28 is aligned with the card block 11 When the conical surfaces 12 of the two adjacent groups of tube shell bodies 1 are docked, the screw rod 29 is continued to be rotated, which can drive the base block 23 to slide relative to the platform plate 22, and the platform plate 22 moves toward the side of the locking block 28 that has completed the docking. At the same time, the clamp block 24 and the docking tube clamp 25 thereon also move synchronously until the inclined surface 215 on the other group of locking blocks 28 is docked with the conical surface 12 of the clamping block 11, and the positioning of the docking tube clamp 25 relative to the two adjacent groups of tube shell bodies 1 is completed. At this time, it can be ensured that the docking tube clamp 25 is positioned in the middle position of the two adjacent groups of tube shell bodies 1.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing connection device for a composite pressure-resistant tube shell, characterized in that: It comprises a tube shell body (1) and a connecting portion (2) for achieving butt joint of tube ends of adjacent tube shell bodies (1); there is a butt joint gap between the tube ends of adjacent tube shell bodies (1); and after the tube shell body (1) is positioned and installed, the connecting portion (2) is positioned at the butt joint gap; The connecting portion (2) comprises a bottom plate (21) fixedly arranged at the butt joint gap, a platform plate (22) guidedly mounted on the bottom plate (21) and driven to rise and fall by a lifting cylinder (214), a base block (23) slidably mounted on the platform plate (22), a clamping block (24) positioned on the base block (23), and a butt joint holding tube (25) disposed in an arc-surface groove at the top of the clamping block (24); two sets of swivels (26) are provided on the outer periphery of the butt joint holding tube (25) and are installed in the arc-surface groove. The two ends of the base block (23) face toward the adjacent two ends. Two groups of guide blocks (27) are sleeved in the end direction of the tube shell body (1), and a group of locking blocks (28) are vertically positioned at the ends of the guide blocks (27). At least one group of screw rods (29) is threadedly connected and passes through the two groups of guide blocks (27). The screw rods (29) are installed in the base block (23) and driven by a driving motor (210) to rotate to drive the two groups of guide blocks (27) to drive the locking blocks (28) to move in the opposite direction. The two groups of locking blocks (28) are symmetrically distributed with respect to the clamp block (24), and a clamping portion for axially limiting at the end of the tube shell body (1) is also provided thereon; The ends of the tube shell body (1) are also connected to sealing parts (3) along the axial guide, and the sealing parts (3) between the tube ends of adjacent tube shell bodies (1) are reversely screwed and installed on the two ends of the butt-jointed tube (25), and the ends of the sealing parts (3) are also provided with butt-jointed sealing rings (4).

2. A sealing connection device for a composite pressure-resistant tube shell according to claim 1, characterized in that: The radial cross section of the rotating ring (26) is T-shaped, and a group of outer gear rings (211) is provided between the two groups of rotating rings (26). The hoop block (24) is provided with an outer gear second (212) for meshing connection with the outer gear ring (211), and the outer gear second (212) is drivingly connected to a drive motor second (213) on the hoop block (24).

3. A sealing connection device for a composite pressure-resistant tube shell according to claim 2, characterized in that: The end of the tube shell body (1) is also provided with a ring-shaped clamping block (11) with a conical surface (12), and the clamping portion includes a semicircular notch (218) matched with the outside of the tube shell body (1), and one end of the semicircular notch (218) close to the butt-jointed tube holder (25) is also provided with an inclined surface (215) butt-jointed with the conical surface (12) of the clamping block (11). After the semicircular notch (218) is engaged with the outside of the tube shell body (1), the screw rod (29) is started to rotate, so that the two groups of locking blocks (28) move towards each other, and the movement is paused until the inclined surfaces (215) on the two groups of locking blocks (28) are both butt-jointed with the conical surface (12) of the clamping block (11), thereby completing the positioning of the butt-jointed tube holder (25) relative to the two adjacent groups of tube shell bodies (1), and the butt-jointed tube holder (25) is positioned in the middle of the two adjacent groups of tube shell bodies (1).

4. The sealing connection device for a composite pressure-resistant tube shell according to claim 1, characterized in that: The sealing portion (3) comprises a sealing tube (31) connected to the tube shell body (1) along an axial direction, the end of the sealing tube (31) facing away from the butt-holding tube (25) is outwardly flared, and the end of the tube shell body (1) is also provided with an annular sealing protrusion (32) that abuts against the flared outer wall of the sealing tube (31) to limit the position, and when the sealing tubes (31) at the tube ends of adjacent tube shell bodies (1) abut and seal, the flared outer wall of the sealing tube (31) is in sealing abutment with the annular sealing protrusion (32).

5. A sealing connection device for a composite pressure-resistant tube shell according to claim 4, characterized in that: A sealing pressure pad (33) for abutting sealing is also provided between the expanded outer wall of the sealing tube (31) and the annular sealing protrusion (32).

6. A sealing connection device for a composite pressure-resistant tube shell according to claim 4, characterized in that: Two groups of shaft rods (34) are symmetrically connected to the expanded outer wall of the sealing tube (31). The shaft rods (34) are parallel to the axial direction of the tube shell body (1) and extend through the annular sealing protrusion (32) and are distributed on both sides of the butt-jointed holding tube (25).

7. A sealing connection device for a composite pressure-resistant tube shell according to claim 6, characterized in that: The extension length of the shaft rod (34) is slightly shorter than the tube end of the sealing tube (31).

8. The sealing connection device for a composite pressure-resistant tube shell according to claim 7, characterized in that: A group of limit plates (35) are also provided at the end of the shaft rod (34), and a limit spring (36) is connected between the limit plates (35) and the end side of the tube shell body (1).

Images