Seamless steel pipe for high-pressure conveying with internal flow channels

Abstract

This utility model relates to the field of seamless steel pipe technology and discloses a high-pressure seamless steel pipe with an internal guide groove. It includes a pipe body assembly and a left connecting assembly and a right connecting assembly respectively installed on the left and right pipe body assemblies. A sealing ring assembly is provided at the inner fitting area between the left connecting assembly and the right connecting assembly, and a fixing assembly is provided at the edge fitting area between the left connecting assembly and the right connecting assembly. The multi-layer buffer of the pipe body assembly and the threaded groove design of the inner pipe can reduce the water pressure while effectively buffering the inner pipe when subjected to high pressure impact, thereby increasing the upper limit of the working water pressure of the steel pipe. At the same time, the sealing plug design at the connection can effectively seal the connection in the high-pressure working environment and avoid high-pressure leakage.

Description

Technical Field

[0001] This utility model relates to the field of seamless steel pipe technology, and more specifically to a high-pressure seamless steel pipe with internal flow channels. Background Technology

[0002] With the increasing demands of modern industry for pipeline strength, sealing and corrosion resistance, seamless steel pipes have emerged. They are formed as a whole from metal billets through hot rolling or cold drawing processes, effectively solving the problems of low weld strength and easy leakage of traditional welded steel pipes, and have become the core material in high-end fields such as petrochemicals and machinery manufacturing.

[0003] When faced with high-pressure working environments, existing seamless steel pipes will have their inner walls subjected to slight deformation due to the impact of high-pressure water flow, resulting in a relatively short service life.

[0004] To address the aforementioned issues, this application provides a high-pressure seamless steel pipe with internal flow channels. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-pressure seamless steel pipe with internal flow guide grooves to solve the problems existing in the background art.

[0006] This utility model provides the following technical solution: a high-pressure seamless steel pipe with an internal flow guide groove, including a pipe body assembly and a left connecting assembly and a right connecting assembly respectively installed on the left and right pipe body assemblies. A sealing ring assembly is provided at the inner fitting part between the left connecting assembly and the right connecting assembly, and a fixing assembly is provided at the edge fitting part between the left connecting assembly and the right connecting assembly.

[0007] Preferably, the pipe assembly includes a steel inner pipe, a flow-guiding threaded groove, a corrugated buffer sleeve, and an outer protective pipe. The steel inner pipe has a flow-guiding threaded groove on its inner side, the corrugated buffer sleeve is fixedly sleeved on the outer side of the steel inner pipe, and the outer protective pipe is fixedly sleeved on the outer side of the corrugated buffer sleeve. When high-pressure water flows through the steel inner pipe, the flow-guiding threaded groove on the inner side of the steel inner pipe guides the water flow into a vortex, reducing its turbulence intensity, reducing radial impact, and preventing the high-pressure water flow from exerting excessive pressure on the inner wall of the steel inner pipe. At the same time, the steel inner pipe is deformed by the high-pressure water flow and presses against the corrugated buffer sleeve set between the steel inner pipe and the outer protective pipe. Due to its corrugated design, the corrugated buffer sleeve will produce a small radial deformation, and the steel inner pipe is effectively buffered.

[0008] Preferably, the left connecting assembly includes a left mounting sleeve, a positioning ring, a snap-fit ​​groove, a positioning groove, and a left convex ring. The left mounting sleeve is fixedly fitted onto the left outer protective tube, and the positioning ring is fixedly fitted onto the right side of the left outer protective tube inside the left mounting sleeve. A snap-fit ​​groove is provided in the middle of the inner side of the left mounting sleeve, a positioning groove is provided at the right end of the left mounting sleeve, and a left convex ring with a uniform circumferential distribution is provided on the inner side of the right end of the left mounting sleeve.

[0009] Preferably, the right connecting assembly includes a right convex ring, positioning holes, snap-fit ​​strips, and a right mounting sleeve. The right mounting sleeve is fixedly fitted onto the left end of the right external protective tube, and the right convex ring is fixedly fitted onto the outer side of the left end of the right mounting sleeve. The left side of the right convex ring and the right mounting sleeve are provided with snap-fit ​​strips that are evenly distributed in a circle. The right convex ring is provided with positioning holes that are evenly distributed in a circle. At this time, the snap-fit ​​strips provided on the right convex ring can be inserted into the left convex ring provided on the left mounting sleeve.

[0010] Preferably, the sealing ring assembly includes an annular rubber gasket and a sealing ring. The annular rubber gasket is disposed between the right-side tube assembly and the positioning ring. The sealing ring is fixedly engaged in the engagement groove opened inside the left mounting sleeve. At this time, the right-side external protective tube and the right mounting sleeve fitted on it can be inserted into the left mounting sleeve fitted on the left-side external protective tube until the right-side tube assembly abuts against the right side of the positioning ring. At the same time, the sealing ring engaged in the engagement groove seals the connection.

[0011] Preferably, the fixing assembly includes a positioning post, a fixing threaded groove, an alloy washer, and a fixing nut. The positioning post is circumferentially fixed and welded to the right side of the positioning groove. The right end of the positioning post has a fixing threaded groove. The positioning post movably passes through the right convex ring through a positioning hole. The alloy washer and the fixing nut are located on the right side of the right convex ring. The alloy washer is movably sleeved on the positioning post. The fixing nut is located on the right side of the alloy washer and threadedly sleeved onto the positioning post through the fixing threaded groove. At this time, the positioning post is inserted into the corresponding positioning hole, and the alloy washer and the fixing nut are sequentially sleeved onto the right end of the positioning post. The fixing nut is then tightened by a diagonal tightening method, which in turn drives and compresses the annular rubber gasket located between the positioning ring and the right external protective tube, thus providing a secondary seal at the connection.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] The multi-layer buffer of the pipe assembly, along with the threaded groove design of the inner pipe, can reduce water pressure while effectively buffering the inner pipe when subjected to high-pressure impact, thereby increasing the upper limit of the working water pressure of the steel pipe. At the same time, the sealing plug design at the connection can effectively seal the connection under high-pressure working environment, preventing high-pressure leakage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a partial cross-sectional view of the overall structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the tube assembly structure of this utility model.

[0017] Figure 4 This is a schematic diagram of the left connecting component structure of this utility model.

[0018] Figure 5 This is a schematic diagram of the right connecting component structure of this utility model.

[0019] Figure 6 For the present utility model Figure 2 Schematic diagram of the structure at point A in the middle.

[0020] The attached figures are labeled as follows: 1. Pipe body assembly; 101. Inner steel pipe; 102. Flow guide thread groove; 103. Corrugated buffer sleeve; 104. Outer protective pipe; 2. Left connecting assembly; 201. Left mounting sleeve; 202. Positioning ring; 203. Snap-fit ​​groove; 204. Positioning groove; 205. Left convex ring; 3. Right connecting assembly; 301. Right convex ring; 302. Positioning hole; 303. Snap-fit ​​strip; 304. Right mounting sleeve; 4. Sealing ring assembly; 401. Annular rubber gasket; 402. Sealing rubber ring; 5. Fixing assembly; 501. Positioning post; 502. Fixing thread groove; 503. Alloy gasket; 504. Fixing nut. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The high-pressure seamless steel pipe with internal guide groove involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Reference Figure 1 and Figure 2 This utility model provides a high-pressure seamless steel pipe with an internal guide groove, including a pipe body assembly 1 and a left connecting assembly 2 and a right connecting assembly 3 respectively installed on the left and right pipe body assemblies 1. A sealing ring assembly 4 is provided at the inner fitting area between the left connecting assembly 2 and the right connecting assembly 3, and a fixing assembly 5 is provided at the edge fitting area between the left connecting assembly 2 and the right connecting assembly 3.

[0023] Reference Figure 1-3The pipe assembly 1 includes a steel inner pipe 101, a flow-guiding threaded groove 102, a corrugated buffer sleeve 103, and an outer protective pipe 104. The steel inner pipe 101 has a flow-guiding threaded groove 102 on its inner side. The corrugated buffer sleeve 103 is fixedly sleeved on the outer side of the steel inner pipe 101. The outer protective pipe 104 is fixedly sleeved on the outer side of the corrugated buffer sleeve 103. When high-pressure water flows through the steel inner pipe 101, the flow-guiding threaded groove 102 on the inner side of the steel inner pipe 101 guides the water flow into a vortex, reducing its turbulence intensity, reducing radial impact, and preventing the high-pressure water flow from exerting excessive pressure on the inner wall of the steel inner pipe 101. At the same time, the steel inner pipe 101 is deformed by the high-pressure water flow and squeezes the corrugated buffer sleeve 103 set between the steel inner pipe 101 and the outer protective pipe 104. Due to its corrugated design, the corrugated buffer sleeve 103 will produce a small radial deformation, and the steel inner pipe 101 is effectively buffered.

[0024] Reference Figure 2 and Figure 4 The left connecting component 2 includes a left mounting sleeve 201, a positioning ring 202, a snap-fit ​​groove 203, a positioning groove 204, and a left convex ring 205. The left mounting sleeve 201 is fixedly fitted onto the left outer protective tube 104. The positioning ring 202 is located on the right side of the left outer protective tube 104 and fixedly fitted onto the inside of the left mounting sleeve 201. The snap-fit ​​groove 203 is provided in the middle of the inner side of the left mounting sleeve 201. The positioning groove 204 is provided at the right end of the left mounting sleeve 201. The left convex ring 205, which is evenly distributed in a circle, is provided on the inner side of the right end of the left mounting sleeve 201.

[0025] Reference Figure 2 and Figure 4 The right connecting component 3 includes a right protruding ring 301, a positioning hole 302, a snap-fit ​​strip 303, and a right mounting sleeve 304. The right mounting sleeve 304 is fixedly fitted on the left end of the right external protective tube 104, and the right protruding ring 301 is fixedly fitted on the outer side of the left end of the right mounting sleeve 304. The left side of the right protruding ring 301 and the right mounting sleeve 304 are provided with snap-fit ​​strips 303 that are evenly distributed in a circle. The right protruding ring 301 is provided with positioning holes 302 that are evenly distributed in a circle. At this time, the snap-fit ​​strips 303 provided on the right protruding ring 301 can be inserted into the left protruding ring 205 opened in the left mounting sleeve 201.

[0026] Reference Figure 2 and Figure 5The sealing ring assembly 4 includes an annular rubber gasket 401 and a sealing rubber ring 402. The annular rubber gasket 401 is disposed between the right tube body assembly 1 and the positioning ring 202. The sealing rubber ring 402 is fixedly snapped into the snap-fit ​​groove 203 opened on the inner side of the left mounting sleeve 201. At this time, the right external protective tube 104 and the right mounting sleeve 304 sleeved on it can be inserted into the left mounting sleeve 201 sleeved on the left external protective tube 104 until the right tube body assembly 1 abuts against the right side of the positioning ring 202. At the same time, the sealing rubber ring 402 snapped into the snap-fit ​​groove 203 seals the connection once.

[0027] Reference Figure 2 and Figure 6 The fixing component 5 includes a positioning post 501, a fixing threaded groove 502, an alloy washer 503, and a fixing nut 504. The positioning post 501 is circumferentially fixed and welded to the right side of the positioning groove 204. The right end of the positioning post 501 has a fixing threaded groove 502. The positioning post 501 movably passes through the right convex ring 301 through the positioning hole 302. The alloy washer 503 and the fixing nut 504 are located on the right side of the right convex ring 301. The alloy washer 503 is movably sleeved on the positioning post 501. The fixing nut 504 is located on the right side of the alloy washer 503 and is threaded onto the positioning post 501 through the fixing threaded groove 502. At this time, the positioning post 501 is inserted into the corresponding positioning hole 302. The alloy washer 503 and the fixing nut 504 are sequentially sleeved onto the right end of the positioning post 501. The fixing nut 504 is then tightened by a diagonal tightening method, which in turn drives and compresses the annular rubber gasket 401 located between the positioning ring 202 and the right external protective tube 104, thus providing a secondary seal at the connection.

[0028] The working principle of this utility model is as follows: When using this pipe, when high-pressure water flows through the inner steel pipe 101, the flow is guided into a vortex by the guide threaded groove 102 on the inner side of the inner steel pipe 101, reducing its turbulence intensity and radial impact, and preventing excessive pressure on the inner wall of the inner steel pipe 101 from the high-pressure water flow. At the same time, the inner steel pipe 101 is deformed by the high-pressure water flow and presses the corrugated buffer sleeve 103 set between the inner steel pipe 101 and the outer protective pipe 104. Due to its corrugated design, the corrugated buffer sleeve 103 will produce a small radial deformation, and the inner steel pipe 101 is effectively buffered, which can adapt to the repeated impact of the high-pressure water flow. When installing the pipe connection, the right outer protective pipe 104 and the right mounting sleeve 304 fitted on it are inserted into the left mounting sleeve 20 fitted on the left outer protective pipe 104. 1. The right pipe assembly 1 is pressed against the right side of the positioning ring 202. At the same time, the sealing ring 402 in the snap-fit ​​groove 203 seals the connection. Then, the snap-fit ​​strip 303 on the right convex ring 301 is inserted into the left convex ring 205 of the left mounting sleeve 201, and the positioning post 501 is inserted into the corresponding positioning hole 302. The alloy gasket 503 and the fixing nut 504 are then put into the right end of the positioning post 501 in sequence. At this time, the fixing nut 504 is tightened by diagonal tightening, which in turn drives and compresses the annular gasket 401 between the positioning ring 202 and the right external protective pipe 104, thus sealing the connection for the second time. Through the above installation and sealing design, the connection between the two pipe assemblies 1 can still achieve a sealing effect above the standard even when receiving a large water pressure.

[0029] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0030] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0031] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-pressure conveying seamless steel pipe with internal flow guide grooves, comprising a pipe body assembly (1) and a left connecting assembly (2) and a right connecting assembly (3) respectively mounted on the left and right sides of the pipe body assembly (1), a sealing ring assembly (4) being arranged at the inner side abutting portion between the left connecting assembly (2) and the right connecting assembly (3), and a fixing assembly (5) being arranged at the abutting portion of the edges of the left connecting assembly (2) and the right connecting assembly (3), characterized in that: The pipe assembly (1) includes a steel inner tube (101), a flow guiding thread groove (102), a corrugated buffer sleeve (103), and an outer protective tube (104). The steel inner tube (101) has a flow guiding thread groove (102) on its inner side. The corrugated buffer sleeve (103) is fixedly sleeved on the outer side of the steel inner tube (101), and the outer protective tube (104) is fixedly sleeved on the outer side of the corrugated buffer sleeve (103). ​ 2. The high-pressure seamless steel pipe with internal flow guide groove according to claim 1, characterized in that: The left connecting component (2) includes a left mounting sleeve (201), a positioning ring (202), a snap-fit ​​groove (203), a positioning groove (204), and a left convex ring (205). The left mounting sleeve (201) is fixedly fitted on the left outer protective tube (104). The positioning ring (202) is located on the right side of the left outer protective tube (104) and fixedly fitted inside the left mounting sleeve (201). The snap-fit ​​groove (203) is provided in the middle of the inner side of the left mounting sleeve (201). The positioning groove (204) is provided at the right end of the left mounting sleeve (201). The left convex ring (205) is evenly distributed in a circle on the inner side of the right end of the left mounting sleeve (201).

3. The high-pressure seamless steel pipe with internal flow guide groove according to claim 2, characterized in that: The right connecting component (3) includes a right protruding ring (301), a positioning hole (302), a snap-fit ​​strip (303), and a right mounting sleeve (304). The right mounting sleeve (304) is fixedly fitted on the left end of the right external protective tube (104). The right protruding ring (301) is fixedly fitted on the outer side of the left end of the right mounting sleeve (304). The left side of the right protruding ring (301) and the right mounting sleeve (304) are provided with snap-fit ​​strips (303) that are evenly distributed in a circle. The right protruding ring (301) is provided with positioning holes (302) that are evenly distributed in a circle.

4. The high-pressure seamless steel pipe with internal flow guide groove according to claim 2, characterized in that: The sealing ring assembly (4) includes an annular rubber pad (401) and a sealing rubber ring (402). The annular rubber pad (401) is disposed between the right tube assembly (1) and the positioning ring (202). The sealing rubber ring (402) is fixedly snapped into the snap-fit ​​groove (203) opened on the inner side of the left mounting sleeve (201).

5. The high-pressure seamless steel pipe with internal flow guide groove according to claim 3, characterized in that: The fixing component (5) includes a positioning post (501), a fixing threaded groove (502), an alloy washer (503), and a fixing nut (504). The positioning post (501) is circumferentially fixedly welded to the right side of the positioning groove (204). The right end of the positioning post (501) is provided with a fixing threaded groove (502). The positioning post (501) passes through the right convex ring (301) through the positioning hole (302). The alloy washer (503) and the fixing nut (504) are located on the right side of the right convex ring (301). The alloy washer (503) is movably sleeved on the positioning post (501). The fixing nut (504) is located on the right side of the alloy washer (503) and is threadedly sleeved on the positioning post (501) through the fixing threaded groove (502).

6. The high-pressure seamless steel pipe with internal flow guide groove according to claim 3, characterized in that: The left protruding ring (205) corresponds to the snap-fit ​​strip (303), so that the snap-fit ​​strip (303) can be inserted into the left protruding ring (205) opened in the left mounting sleeve (201).

7. The high-pressure seamless steel pipe with internal flow guide groove according to claim 5, characterized in that: The positioning hole (302) corresponds to the positioning post (501), so that the positioning post (501) can be inserted into the corresponding positioning hole (302).

8. The high-pressure seamless steel pipe with internal flow guide groove according to claim 5, characterized in that: Both the positioning pin (501) and the fixing nut (504) are made of alloy material, which ensures that the positioning pin (501) will not slip when the fixing nut (504) is tightened.

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