Stainless steel hydraulic pipe welding inflatable positioning device

Abstract

The present invention discloses a stainless steel hydraulic pipe welding inflation positioning device, comprising a pipe body and a positioning mechanism, wherein a positioning mechanism is provided at one end of the pipe body, and an end cover is fixedly connected to one end of the positioning mechanism, an expansion sleeve is inserted inside the positioning mechanism, a tightening screw is movably inserted in the middle of the end cover, the tightening screw is located inside the expansion sleeve, and a butterfly compression nut is movably inserted through the end cover at the periphery of the tightening screw near one end; the present invention provides an effective positioning effect when welding the pipe body by providing a positioning mechanism at one end of the pipe body, and adjusts the connection position of the tightening screw with the expansion sleeve by means of the tightening screw in the positioning mechanism, so that the expansion sleeve can effectively adjust the fit between the expansion sleeve and the pipe body, thereby enabling the positioning mechanism connected through the end cover to implement a synchronous positioning effect, thereby effectively solving the problem of poor appearance quality after welding caused by incorrect visual positioning of high-pressure flange short pipe welding.

Description

Technical Field

[0001] The invention relates to the technical field of positioning devices, in particular to a stainless steel hydraulic pipe welding and inflating positioning device. Background Art

[0002] Steel pipes are divided into two categories according to different production processes: seamless steel pipes and welded steel pipes. Seamless steel pipes are seamless steel pipes made by perforating steel ingots, tube billets or steel bars.

[0003] When stainless steel hydraulic pipes are processed and welded, according to the technical specifications, the outer groove surface of the pipe is sealed with tape before welding, and the inflating tool is installed to fill the protective gas in advance. The purity of argon gas shall not be less than 99.99%. Welding can only be started after the air in the pipe is exhausted and filled with argon gas. The back inflation flow is set to 10L / min, and the volume of the air chamber formed by the sealing tool is about 1L. After 10 seconds, the purity of the protective gas can meet the requirements. During the entire welding process, the pipe must always be filled with argon gas for protection. When welding, first tear off the tape on the groove surface. The tearing length depends on the pipe diameter. After welding is completed, continue to inflate for 30 seconds before stopping the inflation.

[0004] In the process of manufacturing stainless steel pipes for chemical tankers, the pipe body needs to be positioned by a positioning device during welding and inflation. However, the positioning device in the prior art still has the following deficiencies in practical application:

[0005] Due to the structural defects of the positioning device in the prior art, the visual positioning of the high-pressure flange short pipe welding is incorrect, which seriously leads to the problem of poor appearance quality after welding, and therefore cannot meet the requirements of the prior art. Summary of the invention

[0006] The purpose of the present invention is to provide a stainless steel hydraulic pipe welding inflation positioning device to solve the problem that due to its structural defects, the visual positioning of the high-pressure flange short pipe welding is not correct, which seriously leads to the problem of poor appearance quality after welding.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a stainless steel hydraulic pipe welding inflation positioning device, comprising a pipe body and a positioning mechanism, a positioning mechanism is provided at one end of the pipe body, an end cap is fixedly connected to one end of the positioning mechanism, an expansion sleeve is inserted inside the positioning mechanism, a tightening screw is movably inserted in the middle of the end cap, the tightening screw is located inside the expansion sleeve, the outer periphery of the tightening screw near one end passes through the end cap and is movably sleeved with a butterfly compression nut, a macro fastening mechanism is movably sleeved on the outer periphery of the pipe body, a mounting ring is fixedly sleeved on the middle of the outer periphery of the macro fastening mechanism, a screw rod is threadedly inserted on all sides of the outer periphery of the mounting ring, a turntable is fixedly connected to one end of the screw rod, the other end of the screw rod passes through the macro fastening mechanism and is fixedly connected to a second positioning mechanism, a plurality of adjacent second positioning mechanisms are fixedly sleeved with a fixing sleeve, a limiting groove is provided in the middle of the inner wall of the macro fastening mechanism on the outer periphery of the fixing sleeve, a pressure relief groove is provided in the middle of the outer periphery of the fixing sleeve, and the pressure relief groove is movably inserted with the limiting groove.

[0008] Preferably, the inner diameter of the tube body is the same as the inner diameter of the positioning mechanism.

[0009] Preferably, the positioning mechanism is a hollow structure, the periphery of the positioning mechanism is a T-shaped structure, and the diameter of one side of the periphery of the positioning mechanism is not greater than the diameter of the end cover.

[0010] Preferably, the end cover is in a convex-shaped structure, one end of the outer periphery of the end cover is fixedly plugged with the expansion sleeve, and the diameter of one side of the outer periphery of the end cover is the same as the inner diameter of the positioning mechanism.

[0011] Preferably, a card slot is provided at one end of the expansion sleeve, and the card slot is used as a mounting and positioning mechanism for the expansion sleeve on the end cover, and one end of the outer periphery of the expansion sleeve is plugged into the tube body.

[0012] Preferably, one end of the tightening screw is in a truncated cone structure, the diameter of the outer end of the tightening screw is not larger than the inner diameter of the tube body, and the diameter of the outer end of the tightening screw is not smaller than the inner diameter of the expansion sleeve.

[0013] Preferably, both sides of the outer periphery of the butterfly-shaped clamping nut are fixedly connected with a handle body, the handle body is a cylindrical structure, and one end of the handle body is provided with a rounded corner.

[0014] Preferably, protrusions are provided on both sides of the periphery of the positioning mechanism, and a clamping ring is fixedly sleeved on the periphery of the tube body. The clamping ring is fixedly connected to the protrusions through a screw rod, and the protrusions and the clamping ring are used as a connecting positioning mechanism between the tube body and the positioning mechanism.

[0015] Preferably, an adhesive tape is wrapped around the edge of one end of the positioning mechanism, and the positioning mechanism and the adjacent end of the tube body are sealed and connected by the adhesive tape.

[0016] Preferably, positioning grooves are provided around the middle of one side of the outer periphery of the end cover, and the positioning grooves are arranged in an intermittent ring-like manner. Semicircular blocks are provided around the middle of one side of the butterfly clamping nut, and the semicircular blocks are slidably plugged into the positioning grooves.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a positioning mechanism at one end of the pipe body, which can effectively provide a positioning effect when the pipe body is subjected to welding processing. The tightening screw in the positioning mechanism adjusts the connection position with the expansion sleeve, so that the expansion sleeve can effectively adjust the fit between the pipe body, thereby enabling the positioning mechanism connected through the end cover to implement a synchronous positioning effect, thereby ensuring the positioning quality of the pipe body when welding is implemented, and having argon gas beam connection. The positioning mechanism saves gas consumption, has the effects of improving construction quality, improving acceptance rate, reducing costs and increasing efficiency. The positioning device is ingenious in conception, reasonable in structure, easy to manufacture, and low in cost, and effectively improves the positioning quality of pipe docking. After welding, the weld seam on the inner side of the pipe is well formed, which improves the acceptance rate, and has been obtained in the application process. It has been recognized and praised by the staff, achieved the effect of improving quality and increasing efficiency, and has great promotion value, and effectively solved the problem of poor appearance quality after welding due to incorrect visual positioning of high-pressure flange short pipe welding. Through the macro-fastening mechanism, the pipe body can further improve the stability and stability of the connection between the pipe body and the second positioning mechanism when the second positioning mechanism is used to implement auxiliary positioning welding and inflation, and through fine-tuning the second positioning mechanism to implement installation and application on the pipe body, auxiliary fastening and pressure relief adjustment can be performed, so that when the pipe body is placed for welding, the temperature is transmitted to the fixed sleeve through the change of temperature, and the macro-coordination of the pressure relief groove and the limit groove on the fixed sleeve can offset the deviation of the pipe body during welding, thereby effectively improving the positioning accuracy of the pipe body during positioning welding and inflation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a partial half-section structure of the present invention;

[0020] Figure 2 It is a schematic diagram of a partial half-section structure of the tightening screw of the present invention;

[0021] Figure 3 This is a schematic diagram of a partial half-section structure of the expansion sleeve of the present invention;

[0022] Figure 4 This is a schematic diagram of the side structure of the expansion sleeve of the present invention;

[0023] Figure 5 It is a schematic diagram of the side view structure of the end cover of the present invention;

[0024] Figure 6 It is a schematic diagram of a partial half-section structure of the end cover of the present invention;

[0025] Figure 7 It is a partial half-section structural schematic diagram of the butterfly-shaped compression nut of the present invention;

[0026] Figure 8 This is a schematic diagram of the handle structure of the present invention;

[0027] Fig. 9 It is a half-section structural schematic diagram of the macro fastening mechanism of the present invention.

[0028] In the figure: 1-tube body; 2-positioning mechanism; 3-end cover; 4-expansion sleeve; 5-tightening screw; 6-butterfly clamping nut; 7-handle body; 8-macro fastening mechanism; 81-mounting ring; 82-screw rod; 83-turntable; 84-second positioning mechanism; 85-fixing sleeve; 86-limiting groove; 87-pressure relief groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-9 , the present invention provides a technical solution: a stainless steel hydraulic pipe welding inflation positioning device, comprising a pipe body 1 and a positioning mechanism 2, wherein the positioning mechanism 2 is arranged at one end of the pipe body 1;

[0031] The diameter of the pipe body 1 ranges from 34 mm to 48 mm. The pipe body 1 is made of stainless steel. The pipe body 1 is welded to the hydraulic pipe through the positioning mechanism 2. The positioning mechanism 2 can effectively perform the back-side inflation positioning of the pipe body 1.

[0032] One end of the positioning mechanism 2 is fixedly connected with an end cover 3 by bolts, an expansion sleeve 4 is inserted inside the positioning mechanism 2, and a tightening screw 5 is threadedly inserted in the middle of the end cover 3, and the tightening screw 5 is located inside the expansion sleeve 4;

[0033] The tightening screw 5 can be positioned by the end cover 3, and the expansion sleeve 4 can be driven by the tightening screw 5 to expand and position the expansion sleeve 4 in the pipe body 1;

[0034] A butterfly-shaped clamping nut 6 is threadedly sleeved through the end cover 3 at the periphery of the tightening screw 5 near one end. The butterfly-shaped clamping nut 6 can effectively position the tightening screw 5 on the end cover 3 to achieve a tightening effect, so that the expansion sleeve 4 can effectively tighten and limit the position when positioning the positioning mechanism 2 and the pipe body 1.

[0035] A macro fastening mechanism 8 is movably sleeved on the periphery of the tube body 1, and a mounting ring 81 is fixedly sleeved on the middle of the periphery of the macro fastening mechanism 8. A screw rod 82 is threadedly inserted on all four sides of the periphery of the mounting ring 81. A rotating disk 83 is fixedly connected to one end of the screw rod 82, and a second positioning mechanism 84 is fixedly connected to the other end of the screw rod 82 through the macro fastening mechanism 8. A fixing sleeve 85 is fixedly sleeved on the periphery of a plurality of adjacent second positioning mechanisms 84. A limiting groove 86 is provided in the middle of the inner wall of the macro fastening mechanism 8 on the periphery of the fixing sleeve 85, and a pressure relief groove 87 is provided in the middle of the periphery of the fixing sleeve 85. The pressure relief groove 87 is movably inserted into the limiting groove 86.

[0036] Through the macro-fastening mechanism 8, when the tube body 1 is assisted in positioning welding and inflation with the help of the positioning mechanism 2, the stability and stability of the connection between the tube body 1 and the positioning mechanism 2 can be further improved, and the auxiliary fastening pressure relief adjustment can be performed by fine-tuning the positioning mechanism 2 to be installed on the tube body 1, so that when the tube body 1 is placed for welding, the temperature change is transmitted to the fixing sleeve 85, and the macro-coordination of the pressure relief groove 87 and the limit groove 86 on the fixing sleeve 85 can offset the deviation of the tube body 1 during welding, thereby effectively improving the positioning accuracy of the tube body 1 during positioning welding and inflation.

[0037] In some embodiments, the inner diameter of the tube body 1 is the same as that of the positioning mechanism 2 , so that when the tube body 1 and the positioning mechanism 2 are connected, the expansion sleeve 4 can be flexibly displaced in the tube body 1 and the positioning mechanism 2 before installation.

[0038] In some embodiments, the positioning mechanism 2 is a hollow structure, the periphery of the positioning mechanism 2 is a T-shaped structure, and the diameter of one side of the periphery of the positioning mechanism 2 is not larger than the diameter of the end cover 3, so that the positioning mechanism 2 can be firmly connected with the end cover 3 and the expansion sleeve 4 and the tightening screw 5 can be easily installed.

[0039] In some embodiments, the end cover 3 is in a convex-shaped structure. Through the convex-shaped structural design, one end of the outer periphery of the end cover 3 can be fixedly plugged into the expansion sleeve 4. The diameter of one side of the outer periphery of the end cover 3 is the same as the inner diameter of the positioning mechanism 2, thereby facilitating the insertion of the end cover 3 into the inner side of the positioning mechanism 2.

[0040] In some embodiments, a card slot is provided at one end of the expansion sleeve 4, and the card slot is used as a mounting and positioning mechanism for the expansion sleeve 4 on the end cover 3, and one end of the outer periphery of the expansion sleeve 4 is plugged into the pipe body 1;

[0041] The slot prevents the expansion sleeve 4 from rotating during installation, so that the tightening screw 5 can improve the tight fit between the tightening screw 5 and the expansion sleeve 4 when the expansion sleeve 4 is expanded, further improving the radial expansion effect of the expansion end of the expansion sleeve 4.

[0042] In some embodiments, one end of the tightening screw 5 is in a truncated cone structure, the diameter of the outer end of the tightening screw 5 is not greater than the inner diameter of the tube body 1, and the diameter of the outer end of the tightening screw 5 is not less than the inner diameter of the expansion sleeve 4;

[0043] By designing one end to be truncated into a cone shape, the expansion sleeve 4 can be expanded gradually, thereby effectively avoiding the expansion sleeve 4 from cracking due to excessive stress difference, thereby ensuring the safe application of the expansion sleeve 4.

[0044] In some embodiments, both sides of the outer periphery of the butterfly clamping nut 6 are fixedly connected with a handle body 7 by welding. The handle body 7 is a cylindrical structure, and one end of the handle body 7 is provided with a rounded corner. The handle body 7 can facilitate the user to manually adjust the position of the butterfly clamping nut 6 on the tightening screw 5, thereby facilitating the positioning of the tightening screw 5 on the end cover 3.

[0045] In some embodiments, protrusions are fixedly connected on both sides of the periphery of the positioning mechanism 2 by screws, and a clamping ring is fixedly sleeved on the periphery of the tube body 1 by screws, and the clamping ring is threadedly fixedly connected to the protrusions by a screw rod, and the protrusions and the clamping ring are used as a connection and positioning mechanism between the tube body 1 and the positioning mechanism 2;

[0046] Through the connection between the protrusion and the clamp, the pipe body 1 can first play a role in position adjustment and tightening when the positioning welding is implemented through the positioning mechanism 2, thereby achieving a pre-processing positioning arrangement effect and further auxiliary positioning.

[0047] In some embodiments, a tape is wrapped around the edge of one end of the positioning mechanism 2, and the positioning mechanism 2 is sealed and connected to the adjacent end of the tube body 1 by the tape;

[0048] The adhesive tape can improve the sealing between the tube body 1 and the positioning mechanism 2, so that the filled gas can obtain a sealing effect.

[0049] In some embodiments, positioning grooves are provided around the middle of one side of the outer periphery of the end cover 3, and the positioning grooves are arranged in an intermittent annular manner. Semicircular blocks are welded around the middle of one side of the butterfly clamping nut 6, and the semicircular blocks are slidably plugged into the positioning grooves;

[0050] Through the cooperation between the semicircular block and the positioning groove, the butterfly clamping nut 6 and the end cover 3 can effectively play a positioning effect after being fitted together.

[0051] Working principle: When in use, a positioning mechanism 2 is provided at one end of the pipe body 1, which can effectively provide a positioning effect when the pipe body is welded. The connection position with the expansion sleeve 4 is adjusted by means of the tightening screw 5 in the positioning mechanism 2, so that the expansion sleeve 4 can effectively adjust the fit between the pipe body 1, and then the positioning mechanism 2 connected by the end cover 3 can implement a synchronous positioning effect, so that the pipe body 1 can achieve the effect of ensuring the positioning quality when welding, and has argon gas beam connection. The positioning mechanism 2 saves gas consumption, improves the construction quality, improves the acceptance rate, and reduces costs and increases efficiency. The positioning device is ingenious in conception, reasonable in structure, easy to manufacture, and low in cost. It effectively improves the quality of pipe docking positioning. After welding, the inner weld of the pipe is well formed, and the acceptance rate is improved. It has been affirmed and praised by construction personnel during the application process, achieved the effect of improving quality and efficiency, and has great promotion value.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Stainless steel hydraulic pipe welding inflatable positioning device, including: tube body(1); Positioning mechanism (2); The feature is that: a positioning mechanism (2) is provided at one end of the tube body (1); One end of the positioning mechanism (2) is fixedly connected to an end cover (3), an expansion sleeve (4) is inserted inside the positioning mechanism (2), a tightening screw (5) is movably inserted in the middle of the end cover (3), and the tightening screw (5) is located inside the expansion sleeve (4); The outer periphery of the tightening screw (5) near one end thereof passes through the end cover (3) and is movably sleeved with a butterfly-shaped clamping nut (6); The outer periphery of the tube body (1) is movably sleeved with a macro fastening mechanism (8), the outer middle part of the macro fastening mechanism (8) is fixedly sleeved with a mounting ring (81), the outer periphery of the mounting ring (81) is all threadedly plugged with a screw rod (82), one end of the screw rod (82) is fixedly connected to a rotating disk (83), the other end of the screw rod (82) passes through the macro fastening mechanism (8) and is fixedly connected to a second positioning mechanism (84), the outer peripheries of a plurality of adjacent second positioning mechanisms (84) are fixedly sleeved with a fixing sleeve (85), a limiting groove (86) is provided in the middle part of the inner wall of the macro fastening mechanism (8) on the outer periphery of the fixing sleeve (85), a pressure relief groove (87) is provided in the middle part of the outer periphery of the fixing sleeve (85), and the pressure relief groove (87) is movably plugged with the limiting groove (86); The inner diameter of the tube body (1) is the same as the inner diameter of the positioning mechanism (2); The positioning mechanism (2) is of a hollow structure, the periphery of the positioning mechanism (2) is of a T-shaped structure, and the diameter of one side of the periphery of the positioning mechanism (2) is not greater than the diameter of the end cover (3); The end cover (3) is of a convex structure, one end of the outer periphery of the end cover (3) is fixedly plugged with the expansion sleeve (4), and the diameter of one side of the outer periphery of the end cover (3) is the same as the inner diameter of the positioning mechanism (2); A slot is provided at one end of the expansion sleeve (4), the slot being used as a mounting and positioning mechanism for the expansion sleeve (4) on the end cover (3), and one end of the outer periphery of the expansion sleeve (4) is plugged into the pipe body (1).

2. The stainless steel hydraulic pipe welding inflation positioning device according to claim 1 is characterized in that: One end of the tightening screw (5) is in a truncated cone structure, the diameter of the outer end of the tightening screw (5) is not greater than the inner diameter of the tube body (1), and the diameter of the outer end of the tightening screw (5) is not less than the inner diameter of the expansion sleeve (4).

3. The stainless steel hydraulic pipe welding inflation positioning device according to claim 1 is characterized in that: A handle body (7) is fixedly connected to both sides of the outer periphery of the butterfly-shaped compression nut (6); the handle body (7) is in a cylindrical structure, and one end of the handle body (7) is provided with a rounded corner.

4. The stainless steel hydraulic pipe welding inflation positioning device according to claim 1 is characterized in that: The positioning mechanism (2) is provided with protrusions on both sides of its periphery, and the tube body (1) is fixedly sleeved with a clamping ring, which is fixedly connected to the protrusions via a screw rod, and the protrusions and the clamping ring are used as a connection positioning mechanism between the tube body (1) and the positioning mechanism (2).

5. The stainless steel hydraulic pipe welding inflation positioning device according to claim 1 is characterized in that: An adhesive tape is wound around the edge of one end of the positioning mechanism (2), and the positioning mechanism (2) and the adjacent end of the tube body (1) are sealed and connected via the adhesive tape.

6. The stainless steel hydraulic pipe welding inflation positioning device according to claim 1 is characterized in that: Positioning grooves are provided around the middle of one side of the outer periphery of the end cover (3), and the positioning grooves are arranged in an annular manner at intervals. Semicircular blocks are provided around the middle of one side of the butterfly-shaped clamping nut (6), and the semicircular blocks are slidably plugged into the positioning grooves.

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