A large diameter mechanically helically wound pipe

Abstract

The utility model relates to spiral pipeline technical field especially relates to a large -calibre mechanical spiral winding pipeline. Its technical scheme includes: first spiral winding pipeline body, the side end surface of first spiral winding pipeline body is equipped with the second spiral winding pipeline body, the second spiral winding pipeline body and first spiral winding pipeline body all install flange plate on, first spiral winding pipeline body and second spiral winding pipeline body on sliding sleeve joint have lower casing and upper casing, both ends of upper casing all are welded with second connecting block, both ends of lower casing all are welded with first connecting block, the fixed frame is installed in lower casing and upper casing through reset spring, both ends of lower casing and upper casing all are installed screw rod through screw thread. The utility model satisfies spiral pipeline use, and the pipeline connecting place is covered protection when using, and can carry out secondary fixed position to pipeline connecting place, avoids the medium flow impact to cause the connecting place to loosen for a long time.

Description

Technical Field

[0001] This utility model relates to the field of spiral pipe technology, specifically to a large-diameter mechanically spiral-wound pipe. Background Technology

[0002] Spiral wound pipes, as an important transmission medium in the industrial field, use strip steel coils as raw materials. They are formed by cold extrusion and welded into spiral seam steel pipes using an automatic double-wire double-sided submerged arc welding process. In its production process, the strip steel is fed into the pipe welding unit and gradually rolled up by multiple rollers to form a circular pipe blank with an open gap. By precisely adjusting the pressing amount of the extrusion rollers, the weld gap is strictly controlled within 1-3mm to ensure that the two ends of the weld are flush, thereby guaranteeing the basic forming quality and sealing performance of the pipe.

[0003] A search revealed that patent CN221402096U discloses a large-diameter reinforced spiral steel pipe. While this device uses an inner sealing ring to create a barrier, making the connection between the first and second spiral pipes smoother and preventing the sealing ring from bulging inwards under pressure from the spiral pipe body, thus avoiding significant changes in the flow velocity of the transported medium at the connection, this device only provides protection for the pipe connection and lacks an effective secondary fixing and limiting structure. When various media are transported in the pipeline for extended periods, the continuous impact of the media flow on the pipe connection can easily lead to loosening or even detachment, seriously affecting the stability and safety of the pipeline system and posing potential leakage risks and production accident hazards. Therefore, to address the shortcomings of the existing technology, it is urgent to optimize and improve the spiral wound pipe connection structure and related devices to enhance the reliability and service life of the pipeline system. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a large-diameter mechanically spiral-wound pipe, which solves the problems mentioned in the background art.

[0005] The solution to the above-mentioned technical problems provided by this utility model is as follows: A large-diameter mechanically spiral-wound pipe includes a first spiral-wound pipe body, a second spiral-wound pipe body is provided on the side end face of the first spiral-wound pipe body, and flanges are installed on both the second spiral-wound pipe body and the first spiral-wound pipe body. A lower shell and an upper shell are slidably sleeved on the first spiral wound pipe body and the second spiral wound pipe body. A second connecting block is welded to both ends of the upper shell, and a first connecting block is welded to both ends of the lower shell. Both the lower and upper housings have fixing brackets installed inside them via return springs, and both ends of the lower and upper housings are threaded with screws.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the flanges on the second spiral wound pipe body and the first spiral wound pipe body are connected by a first bolt, and a nut is installed on the first bolt by thread. A flange gasket is provided on the inner wall of the flange.

[0008] The beneficial effects of adopting the above-mentioned further solutions are: The two flanges are connected by the engagement of the first bolt and nut, ensuring a secure connection between the first and second spiral wound pipe bodies and guaranteeing the structural strength of the pipeline system. The flange gasket fills the tiny gaps between the flanges, forming a tight seal that effectively prevents leakage of transported media such as water and gas.

[0009] Furthermore, a T-shaped connecting block is welded to the bottom end face of the second connecting block, and the T-shaped connecting block is slidably fitted inside the first connecting block.

[0010] The beneficial effects of adopting the above-mentioned further solutions are: The sliding sleeve structure between the T-shaped connecting block and the first connecting block provides precise guidance for the assembly of the upper and lower shells. During installation, construction personnel can quickly align the upper and lower shells, significantly improving installation efficiency. Simultaneously, this structure allows the upper and lower shells to mutually restrict each other's position after assembly, preventing misalignment due to vibration or other factors during pipeline operation and enhancing the stability of the pipe connection's covering structure.

[0011] Furthermore, the second connecting block and the first connecting block are connected by a second bolt, and a nut is installed on the second bolt by thread.

[0012] The beneficial effects of adopting the above-mentioned further solutions are: The tightening of the second bolt and nut ensures that the upper and lower shells form a robust whole after initial assembly. Compared to a simple sliding sleeve connection, this method effectively resists the effects of external impacts and internal pipeline pressure, ensuring that the shell always encloses the pipeline connection and provides continuous and stable protection. Furthermore, when pipeline maintenance is required, the upper and lower shells can be easily separated by removing the second bolt, allowing workers to quickly access the pipeline structure and reducing maintenance difficulty.

[0013] Furthermore, a limiting rod is fixedly installed on the fixing frame, and the limiting rod is slidably sleeved inside the lower housing and the upper housing.

[0014] The beneficial effects of adopting the above-mentioned further solutions are: The limit rod defines the path for the movement of the fixed bracket, preventing it from shifting or tilting when moved under the action of the return spring. This ensures that the clamping blocks on the fixed bracket are always accurately aligned with the flange, allowing the clamping blocks to stably exert their squeezing and limiting effect on the flange. Even when the pipeline vibrates due to media flow or is affected by external environmental vibrations, the limit rod maintains the correct position of the fixed bracket, ensuring the secure fixing of the pipeline connection.

[0015] Furthermore, a clamping block is welded to the inner wall of the fixing frame, and the clamping block squeezes and limits the flange.

[0016] The beneficial effects of adopting the above-mentioned further solutions are: When the clamping block acts directly on the flange, it tightly presses against the flange from the side, providing a limiting force. This limiting method effectively compresses and limits the pipe connection, enhancing the connection stability. During the transport of media in large-diameter pipelines, the flow of the media may cause vibration and impact at the pipe connection. The clamping block can work in conjunction with other fixing structures to prevent loosening of the pipe connection due to vibration and impact, thus improving the reliability of the pipeline system.

[0017] Furthermore, a handle is installed on the screw, and the screw compresses and limits the flange.

[0018] The beneficial effects of adopting the above-mentioned further solutions are: The handle provides a leverage point for construction workers to operate the screw, allowing them to easily rotate the screw and adjust the pressure of the screw on the flange. During pipe installation, the fixing bracket is first reset by pulling the return spring, causing the clamping block to unfold. Then, the handle is rotated to rotate the screw. The screw, through the cooperation of the fixing bracket and the clamping block, applies pressure to the flange end face, limiting the pipe connection. The tension generated by the return spring pulling the fixing bracket back to its original position prevents the screw from rotating again after it has already rotated.

[0019] This utility model provides a large-diameter mechanically spiral-wound pipe. It has the following beneficial effects: Through the synergistic effect of multiple structural designs, the reliability and practicality of large-diameter pipe connections are improved. In terms of the connection structure, the combination of the flange, first bolt, nut, and flange gasket achieves a stable and sealed connection between the first and second spirally wound pipe bodies, effectively preventing media leakage. The T-shaped connecting blocks of the upper and lower shells slide and fit with the first connecting block, and are secured with the second bolt. This not only covers the shell but also enhances its protective stability at the pipe connection point and facilitates later maintenance and disassembly.

[0020] In terms of fixed positioning, the cooperation of the fixing frame, limiting rod, clamping block, and screw constitutes a comprehensive positioning system. The limiting rod ensures precise movement of the fixing frame, the clamping block presses against the limiting flange from the side, the screw can adjust the pressing force on the flange end face, and the tension generated by the return spring can prevent the screw from loosening. Multiple fixing measures effectively resist vibration and impact during pipeline operation, prevent loosening at the connection, and ensure the stable operation of the pipeline system. Attached Figure Description

[0021] Figure 1 This is a front view schematic diagram of the present invention; Figure 2 This is a schematic diagram of the flange installation of this utility model; Figure 3 This is a side view of the lower shell and upper shell of this utility model; Figure 4 This is a schematic diagram of the interior of the lower shell of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. First spiral wound pipe body; 2. Second spiral wound pipe body; 3. Lower shell; 301. First connecting block; 302. Screw; 303. Limiting rod; 304. Fixing frame; 305. Clamping block; 306. Return spring; 4. Upper shell; 401. Second connecting block; 402. T-shaped connecting block; 403. Second bolt; 5. Flange; 501. First bolt. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1 to 4 As shown, the embodiments provided by this utility model are as follows: Example 1

[0025] A large-diameter mechanically spiral wound pipe includes a first spiral wound pipe body 1, a second spiral wound pipe body 2 is provided on the side end face of the first spiral wound pipe body 1, and a flange 5 is installed on both the second spiral wound pipe body 2 and the first spiral wound pipe body 1. The first spiral wound pipe body 1 and the second spiral wound pipe body 2 are slidably sleeved with a lower shell 3 and an upper shell 4. The two ends of the upper shell 4 are each welded with a second connecting block 401, and the two ends of the lower shell 3 are each welded with a first connecting block 301. Both the lower housing 3 and the upper housing 4 are equipped with fixing brackets 304 by means of return springs 306, and both ends of the lower housing 3 and the upper housing 4 are equipped with screws 302 by means of threads; The flanges 5 on the second spiral wound pipe body 2 and the first spiral wound pipe body 1 are connected by a first bolt 501. A nut is threaded onto the first bolt 501. A flange gasket is provided on the inner wall of the flange 5. Through the cooperation of the first bolt 501 and the nut, the two flanges 5 can be connected, so that the first spiral wound pipe body 1 and the second spiral wound pipe body 2 are firmly connected, ensuring the structural strength of the pipeline system. The flange gasket can fill the tiny gaps between the flanges 5, forming a tight sealing structure, effectively preventing leakage of transported media such as water and gas. A T-shaped connecting block 402 is welded to the bottom end face of the second connecting block 401. The T-shaped connecting block 402 is slidably fitted inside the first connecting block 301. This sliding fit structure between the T-shaped connecting block 402 and the first connecting block 301 provides precise guidance for the assembly of the upper shell 4 and the lower shell 3. During installation, construction personnel can quickly align the upper shell 4 and the lower shell 3, significantly improving installation efficiency. Simultaneously, this structure allows the upper shell 4 and the lower shell 3 to mutually restrict their positions to a certain extent after assembly, preventing misalignment of the shells due to vibration or other factors during pipeline operation, thus enhancing the stability of the covering structure at the pipeline connection. The second connecting block 401 and the first connecting block 301 are connected by a second bolt 403. A nut is threaded onto the second bolt 403. The tight connection between the second bolt 403 and the nut ensures that the upper housing 4 and the lower housing 3 form a solid whole after initial assembly. Compared to a simple sliding sleeve connection, this connection method effectively resists the impact of external impacts and internal pipeline pressure on the housing, ensuring that the housing always surrounds the pipeline connection and provides continuous and stable protection for the pipeline. Furthermore, when pipeline maintenance is required, the upper housing 4 and the lower housing 3 can be easily separated by removing the second bolt 403, allowing workers to quickly access the pipeline structure and reducing maintenance difficulty. Example 2

[0026] To provide both protective covering and secondary fixation at pipe connections, for example, such as... Figures 1 to 4 As shown, this utility model also includes: A limiting rod 303 is fixedly installed on the fixed frame 304. The limiting rod 303 is slidably sleeved within the lower housing 3 and the upper housing 4. The setting of the limiting rod 303 defines the path for the movement of the fixed frame 304, preventing the fixed frame 304 from shifting or tilting when moving under the action of the return spring 306. This ensures that the clamping block 305 on the fixed frame 304 can always be accurately aligned with the flange 5, so that the squeezing and limiting effect of the clamping block 305 on the flange 5 can be stably exerted. Even when the pipeline vibrates due to the flow of the medium or is affected by the vibration of the external environment, the limiting rod 303 can maintain the correct position of the fixed frame 304, ensuring the fixing effect of the pipeline connection. The inner wall of the fixing bracket 304 is welded with a clamping block 305. The clamping block 305 compresses and limits the flange 5. When the clamping block 305 acts directly on the flange 5, it tightly compresses the flange 5 from the side, providing a limiting force for the flange 5. This limiting method can effectively compress and limit the pipe connection, enhancing the connection stability of the pipe connection. During the transportation of media in large-diameter pipelines, the flow of the media may cause certain vibrations and impacts at the pipe connection. The clamping block 305 can work in conjunction with other fixing structures to prevent the pipe connection from loosening due to vibration and impact, thereby improving the reliability of the pipeline system operation. A handle is installed on the screw 302. The screw 302 compresses and limits the flange 5. The handle provides a leverage point for the operator to operate the screw 302, allowing them to easily rotate the screw 302 and adjust the compression force on the flange 5. During pipeline installation, the return spring 306 first pulls the fixing bracket 304 to reset, causing the clamping block 305 to unfold. Then, the handle is rotated to rotate the screw 302. The screw 302, through the cooperation of the fixing bracket 304 and the clamping block 305, applies pressure to the end face of the flange 5, limiting the pipeline connection. The tension generated by the return spring 306 pulling the fixing bracket 304 to reset prevents the screw 302 from rotating again after rotation.

[0027] Working principle: Preliminary assembly of the pipeline: Place the side ends of the first spiral wound pipe body 1 and the second spiral wound pipe body 2 together, so that the flanges 5 on the two are fitted together. The first bolt 501 is used in conjunction with the nut, passing through the corresponding holes on the flange 5 and tightening. The gap between the flanges 5 is filled with a flange gasket to achieve a stable and sealed connection between the first spiral wound pipe body 1 and the second spiral wound pipe body 2, thus completing the preliminary connection of the pipeline body.

[0028] Housing Installation: The lower housing 3 and upper housing 4 are slidably fitted onto the first spiral wound pipe body 1 and the second spiral wound pipe body 2, respectively. At this time, the T-shaped connecting blocks 402 at both ends of the upper housing 4 are slidably fitted onto the first connecting blocks 301 at both ends of the lower housing 3, providing guidance for the assembly of the upper housing 4 and the lower housing 3 and aligning them. After alignment, the second bolts 403 are passed through the holes on the second connecting blocks 401 and the first connecting blocks 301, and tightened with nuts to fix the upper housing 4 and the lower housing 3 into a whole, covering the outside of the pipe connection and providing protection.

[0029] Fixed Limit Adjustment: Before installing the lower housing 3 and upper housing 4, the return spring 306 is in a stretched state, pulling the fixing bracket 304 to unfold the clamping block 305 on the fixing bracket 304. After the lower housing 3 and upper housing 4 are fitted onto the pipeline and aligned and fixed, the construction worker holds the handle on the screw 302 and rotates the screw 302. The screw 302 pushes the fixing bracket 304 to move, and the fixing bracket 304 drives the clamping block 305 to move towards the flange 5. At the same time, the limiting rod 303 restricts the movement path of the fixing bracket 304 to prevent it from deviating or tilting, ensuring that the clamping block 305 accurately presses the limiting flange 5 from the side. The screw 302 continues to rotate until a suitable pressing force is applied to the flange 5. At this time, the tension generated by the return spring 306 will prevent the screw 302 from rotating again, completing the fixed limit at the pipeline connection.

[0030] Operation and Maintenance: During pipeline operation, the connecting structure of flange 5, along with the shell and fixed limiting structure, work together to resist vibrations generated by the flow of the medium and external environmental vibrations and impacts, ensuring the stability of the pipeline connection and preventing loosening and medium leakage. When pipeline maintenance is required, simply unscrew the second bolt 403 to separate the upper shell 4 from the lower shell 3, allowing personnel to easily access the pipeline structure for inspection and maintenance.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A large-diameter mechanically spiral-wound pipe, comprising a first spiral-wound pipe body (1), a second spiral-wound pipe body (2) provided on the side end face of the first spiral-wound pipe body (1), and flanges (5) installed on both the second spiral-wound pipe body (2) and the first spiral-wound pipe body (1), characterized in that: The first spiral wound pipe body (1) and the second spiral wound pipe body (2) are slidably sleeved with a lower shell (3) and an upper shell (4). The upper shell (4) is welded with a second connecting block (401) at both ends, and the lower shell (3) is welded with a first connecting block (301) at both ends. Both the lower housing (3) and the upper housing (4) are fitted with a fixing bracket (304) by means of a return spring (306), and both ends of the lower housing (3) and the upper housing (4) are fitted with screws (302) by means of threads.

2. The large-diameter mechanically spiral-wound pipe according to claim 1, characterized in that: The flanges (5) on the second spiral wound pipe body (2) and the first spiral wound pipe body (1) are connected by a first bolt (501). A nut is installed on the first bolt (501) by thread, and a flange gasket is provided on the inner wall of the flange (5).

3. The large-diameter mechanically spiral-wound pipe according to claim 1, characterized in that: The bottom end face of the second connecting block (401) is welded with a T-shaped connecting block (402), which is slidably sleeved inside the first connecting block (301).

4. The large-diameter mechanically spiral-wound pipe according to claim 2, characterized in that: The second connecting block (401) and the first connecting block (301) are connected by a second bolt (403), and a nut is installed on the second bolt (403) by thread.

5. The large-diameter mechanically spiral-wound pipe according to claim 1, characterized in that: A limiting rod (303) is fixedly installed on the fixing frame (304), and the limiting rod (303) is slidably sleeved in the lower housing (3) and the upper housing (4).

6. The large-diameter mechanically spiral-wound pipe according to claim 1, characterized in that: The inner wall of the fixing frame (304) is welded with a clamping block (305), which clamps and limits the flange (5).

7. The large-diameter mechanically spiral-wound pipe according to claim 1, characterized in that: A handle is installed on the screw (302), and the screw (302) compresses and limits the flange (5).

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