Clamping device for pipe fitting joint machining and using method

Abstract

The invention relates to the technical field of pipe fitting connector machining, in particular to a clamping device for pipe fitting connector machining and a using method, the clamping device comprises a base plate for being placed on the ground, a transverse column for bearing a main pipeline is fixedly arranged on the base plate through a support, and a socket is arranged on the upper side of the end of the transverse column. According to the clamping device for pipe fitting joint machining and the using method, when a main pipe / an auxiliary pipe is sleeved with a transverse column / a vertical column, a rubber disc automatically enters a pipe cavity, a sliding rubber cover and a pipe opening form sealing, the rubber disc and the rubber cover relatively displace to generate negative pressure adsorption force, a spring clamping block locks a displacement end point, and the deformation risk of a traditional clamp is avoided through an air pressure fixing mode; when the vertical column is inserted into the socket, the gear frame drives the gear set to rotate, the deflection system drives the inner pin to rotate to the horizontal position, the sliding sleeve protruding block moves along the traction groove, and when the sliding sleeve protruding block slides outwards, a notch of the main pipeline is automatically pressed downwards to achieve accurate alignment of the sliding sleeve protruding block and the auxiliary pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe fitting joint processing, and specifically provides a clamping device and a usage method for pipe fitting joint processing. Background Art

[0002] In the actual processing and manufacturing of special-shaped pipe joints, such as tee pipes, in actual processing work, pipe fitting assembly, welding, and grinding operations are required. Common tee pipes are assembled and welded by opening a "V"-shaped groove on the main pipe and then grinding out "V" shapes on both sides of the branch pipe correspondingly. In actual processing, the assembly accuracy of pipe fittings is directly related to the processing quality of special-shaped pipes. Currently, it is usually through fixtures to clamp and dock the main pipe and the branch pipe and then carry out subsequent processing work.

[0003] However, traditional pipe clamping processes mainly rely on mechanical fixtures or bolt fixation, and have the following defects: Risk of physical damage: Rigid clamping easily causes pipe deformation or coating peeling, especially poor adaptability to thin-walled pipes or L-shaped pipes; High dependence on manual labor: The alignment of the cut needs to be adjusted repeatedly, and separate airtightness detection is required after welding, resulting in low efficiency; Single functionality: The clamping and detection links are separated, increasing the complexity of the process.

[0004] In view of this, we propose a clamping device and a usage method for pipe fitting joint processing. Summary of the Invention

[0005] The purpose of the present invention is to provide a clamping device and a usage method for pipe fitting joint processing to solve the problems of the existing technology such as the risk of physical damage, high dependence on manual labor, and single functionality mentioned in the above background art. To achieve the above purpose, the present invention provides the following technical solution: A clamping device for pipe fitting joint processing includes a chassis for floor placement. A cross-column for carrying the main pipe is fixedly arranged on the chassis through a bracket, and a socket is arranged on the upper side of the end of the cross-column. A vertical column for carrying the sub-pipe is inserted into the socket; Pipe caps that are stuck at the pipe orifices are fixedly arranged at the ends of the vertical column and the cross-column away from the insertion part; Rubber disks that are inserted into the pipe are fixedly arranged on the vertical column and the cross-column, and rubber covers for sealing the pipe orifice are slidably arranged on the vertical column and the cross-column. Spring blocks for restricting the rubber covers from returning are arranged on the vertical column and the cross-column. When the rubber disks and the rubber covers move away from each other, negative pressure is created inside the pipe.

[0006] Preferably, pin slots are provided on the side surfaces of the vertical column and the cross-column, and a rotating pin is rotatably connected in the pin slots. The rotating pin penetrates through the pipe cap and extends to the outside, and air vents for communicating the spaces on both sides of the rubber disk are provided on the surface of the rotating pin.

[0007] Preferably, slots are formed on the surface of the cross column inside the socket. The bottom end of the vertical column is movably inserted with a spring column, and a tooth rack inserted into the slot is fixedly arranged at the bottom end of the spring column. Two rotating shafts are rotatably connected in the slot, and gears meshing with the tooth rack are arranged on the rotating shafts. A torsion spring for resetting is arranged on the rotating shaft; A pin is fixedly connected to the side surface of the rotating shaft, and a sliding sleeve is slidably sleeved on the pin. A through groove communicating with the slot is formed in the socket and the cross column. When the tooth rack pushes the rotating shaft to rotate, the pin and the sliding sleeve rotate along the through groove to be horizontal. A traction groove is formed on the inner side wall of the through groove. A convex block is fixedly arranged on the side surface of the sliding sleeve. When the pin rotates to be horizontal, the convex block drives the sliding sleeve to perform reciprocating displacement of outward sliding and inward retracting along the traction groove, and when the sliding sleeve slides outward, it presses down into the cut of the main pipeline, pushing the main pipeline to keep the cut facing upward.

[0008] Preferably, the rubber disc adopts a replaceable multi-layer rubber gasket structure.

[0009] Preferably, when the sliding sleeve slides outward, its end forms a positioning pressing block for the cut of the main pipeline.

[0010] Preferably, rolling steel balls are embedded in the traction groove, forming a rolling friction fit with the convex block.

[0011] Preferably, synchronous tooth patterns meshing with each other are arranged on the surface of the rotating shaft.

[0012] A using method of a clamping device for pipe fitting joint processing comprises the following steps: S1. The main pipeline is sleeved on the cross column, and the auxiliary pipeline is sleeved on the vertical column. During this process, the rubber disc enters the pipe, and the rubber cover is buckled on the pipe orifice for sealing. The continuously moving rubber disc and the rubber cover displace in opposite directions to form negative pressure adsorption until the spring catch restricts the rubber cover from returning, and then the vertical column is inserted into the cross column to complete the pipeline docking.

[0013] S2. During the process of inserting the vertical column into the socket, the tooth rack at the bottom end of the spring column is inserted into the slot, driving the gear to rotate. The pin rotates to be horizontal along with the rotating shaft. The sliding sleeve reciprocates along the traction groove through the convex block, and presses down the cut of the main pipeline when the sliding sleeve slides outward, ensuring that the cut is aligned with the auxiliary pipeline.

[0014] S3. After the pipeline is welded, rotate the rotating pin to connect the ventilation groove to both sides of the rubber disc, and the negative pressure area is connected to the welding area. If there is air leakage at the welding position, there is no negative pressure in the pipe. If there is no air leakage at the welding position, there is a certain negative pressure in the pipe. When the vertical column is pulled out, the negative pressure feedback can be used to judge whether there is air leakage at the welding position.

[0015] Compared with the prior art, the beneficial effects of the present invention: In the present invention, for the negative pressure clamping system: when the main pipe / auxiliary pipe is respectively sleeved onto the horizontal column / vertical column, the rubber disc automatically enters the pipe cavity, the sliding rubber cover forms a seal with the pipe orifice, the relative displacement between the rubber disc and the rubber cover generates a negative pressure adsorption force, and the spring catch locks the displacement end point. The air pressure fixing method avoids the deformation risk of traditional clamps, and is especially suitable for the processing of different pipe fittings of T / L types.

[0016] In the present invention, for the self-aligning mechanism: when the vertical column is inserted into the socket, the tooth rack drives the gear set to rotate, and through this deflection system, the inner pin is driven to turn to the horizontal position. The sliding sleeve convex block moves along the traction groove, and when sliding outwards, it automatically presses down the incision of the main pipe to achieve precise alignment with the auxiliary pipe.

[0017] In the present invention, for the quality inspection system: rotating the rotating pin connects the ventilation groove to the welding area and the negative pressure cavity. When the vertical column is pulled out, the airtightness is judged by the negative pressure maintenance state (no negative pressure = air leakage, having negative pressure = sealed). This device realizes the full-process automation of clamping - positioning - inspection through mechanical linkage, significantly improving the processing efficiency of special-shaped pipe fittings. Description of the Drawings

[0018] Figure 1 is the clamping schematic diagram of the T-shaped pipe of the present invention; Figure 2 is the clamping schematic diagram of the L-shaped pipe of the present invention; Figure 3 is the three-dimensional structural cross-section of the clamping state of the T-shaped pipe of the present invention Figure 1 ; Figure 4 is the three-dimensional structural cross-section of the clamping state of the T-shaped pipe of the present invention Figure 2 ; Figure 5 is the three-dimensional structural cross-section of the horizontal column of the present invention Figure 1 ; Figure 6 is of the present invention Figure 5 the enlarged view of part A; Figure 7 is the three-dimensional structural cross-section of the horizontal column of the present invention Figure 2 ; Figure 8 is the three-dimensional structural cross-sectional view of the horizontal column and the socket of the present invention; Figure 9 is the three-dimensional structural schematic diagram of the vertical column of the present invention; Figure 10 is the three-dimensional structural cross-section of the vertical column of the present invention Figure 1 ; Figure 11 is of the present invention Figure 10 the enlarged view of part B; Figure 12 is the three-dimensional structural cross-section of the vertical column of the present invention Figure 2 .

[0019] In the figure: 1, chassis; 2, bracket; 3, cross column; 4, socket; 5, vertical column; 6, pipe cover; 7, rubber disc; 8, rubber cover; 9, spring catch; 10, pin slot; 11, rotating pin; 12, ventilation slot; 13, slot; 14, spring column; 15, tooth rack; 16, gear; 17, rotating shaft; 18, torsion spring; 19, inner pin; 20, sliding sleeve; 21, through slot; 22, traction slot; 23, convex block. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0021] Please refer to Figures 1 to 12 , the present invention provides a technical solution: a clamping device for processing pipe fittings, including a chassis 1 for floor placement, a cross column 3 for carrying the main pipe is fixedly arranged on the chassis 1 through a bracket 2, and a socket 4 is arranged on the upper side of the end of the cross column 3, and a vertical column 5 for carrying the sub-pipe is inserted into the socket 4.

[0022] Pipe covers 6 that are stuck at the pipe orifices are fixedly arranged at one ends of the vertical column 5 and the cross column 3 away from the insertion part. For T-shaped pipes, separate pipe covers 6 are required to seal the remaining pipe orifices.

[0023] Rubber discs 7 that are clamped into the pipes are fixedly arranged on the vertical column 5 and the cross column 3, and rubber covers 8 for sealing the pipe orifices are slidably arranged on the vertical column 5 and the cross column 3. Spring catches 9 for restricting the rubber covers 8 from returning to their original positions are arranged on the vertical column 5 and the cross column 3. When the rubber discs 7 and the rubber covers 8 move away from each other, a negative pressure is created inside the pipe.

[0024] Pin slots 10 are respectively formed on the side surfaces of the vertical column 5 and the cross column 3, and a rotating pin 11 is rotatably connected in the pin slot 10. The rotating pin 11 penetrates through the pipe cover 6 and extends to the outside, and a ventilation slot 12 for communicating the spaces on both sides of the rubber disc 7 is formed on the surface of the rotating pin 11.

[0025] A slot 13 is formed on the surface of the cross column 3 inside the socket 4. The bottom end of the vertical column 5 is movably inserted with a spring column 14, and a tooth rack 15 inserted into the slot 13 is fixedly arranged at the bottom end of the spring column 14. Two rotating shafts 17 are rotatably connected in the slot 13, and gears 16 meshing with the tooth rack 15 are arranged on the rotating shafts 17. A torsion spring 18 for resetting it is arranged on the rotating shaft 17.

[0026] A inner pin 19 is fixedly connected to the side surface of the rotating shaft 17, and a sliding sleeve 20 is slidably sleeved on the inner pin 19. Through grooves 21 communicating with the slot 13 are formed in the socket 4 and the cross column 3. When the tooth rack 15 pushes the rotating shaft 17 to rotate, the inner pin 19 and the sliding sleeve 20 rotate to be horizontal along the through groove 21. Traction grooves 22 are formed in the inner side wall of the through groove 21. A convex block 23 is fixedly arranged on the side surface of the sliding sleeve 20. When the inner pin 19 rotates to be horizontal, the convex block 23 drives the sliding sleeve 20 to perform reciprocating displacement of outward sliding and inward retracting along the traction groove 22. When the sliding sleeve 20 slides outward, it presses down into the incision of the main pipeline, and pushes the main pipeline to keep the incision facing upward.

[0027] Structural Embodiment

[0028] 1. Main Frame and Basic Structure Chassis: Made of HT250 cast iron, with 4 groups of M12 anchor bolt mounting holes at the bottom for device fixation.

[0029] Bracket: Welded and formed by Q235B steel pipe, with an inclination angle of 15°. A cross column is welded at the top. The surface of the cross column is plated with hard chromium (thickness 5μm), and a socket is provided at the front end.

[0030] Vertical Column: The material is 45# steel after quenching and tempering. The bottom end is connected to the tooth rack through a spring column, and the pre-compression stroke of the spring column is 30mm.

[0031] 2. Negative Pressure Clamping System Glue Disk: Adopts a replaceable three-layer composite structure (outer layer NBR rubber with a thickness of 3mm, middle layer EPDM with a thickness of 2mm, inner layer silica gel with a thickness of 1mm). The outer diameter has an interference fit with the inner diameter of the main pipeline (interference amount 0.5 - 1mm).

[0032] Glue Cover: Is an annular rubber seal, slidably sleeved on the outer surface of the column body.

[0033] Spring Catch: Symmetrically distributed on both sides of the glue cover. The wedge-shaped locking tongue at the end is pressed into the column body and then pops out to lock the glue cover.

[0034] 3. Self - Alignment Mechanism Gear Transmission Group: Two rotating shafts are symmetrically installed in the slot. The module of the end gear is 2.5, and synchronous tooth patterns are provided on the side wall.

[0035] Sliding Sleeve Mechanism: The rotating shaft is fixed with a horizontal inner pin (Φ10mm). The inner diameter of the sliding sleeve is Φ10.1mm. The outer convex block moves along the traction groove, and Φ3mm steel balls are embedded in the groove to form rolling friction.

[0036] Torsion Spring Reset: The torque coefficient is 0.8N·m / rad.

[0037] 4. Welding Detection Module Rotating Pin: The material is 304 stainless steel, with an outer diameter of Φ8mm and a rotation angle of 180° ± 2°.

[0038] Negative pressure feedback: The ventilation groove connects the welding area and the negative pressure cavity, and the pressure change is monitored by a vacuum gauge.

[0039] Functional implementation example Pipe clamping: The rubber disk and the rubber cover displace in opposite directions to form negative pressure, and after the spring catch is locked, deformation-free fixation is achieved.

[0040] Cut alignment: The tooth rack drives the gear to rotate, and the sliding sleeve slides outwards and then presses down on the pipe cut.

[0041] Airtightness detection: If the negative pressure drop is ≤ 5% within 30 seconds, it is judged that the seal is qualified.

[0042] A method for using a clamping device for pipe fitting joint processing includes the following steps: S1. Insert the main pipe into the cross column 3 and the auxiliary pipe into the vertical column 5. During this process, the rubber disk 7 enters the pipe, the rubber cover 8 is buckled on the pipe opening for sealing, and the continuously moving rubber disk 7 and the rubber cover 8 displace in opposite directions to form negative pressure adsorption until the spring catch 9 restricts the rubber cover 8 from returning. Then insert the vertical column 5 into the cross column 3 to complete the pipe docking. In this way, the pipe is fixed on the column by using the negative pressure space formed inside the pipe. Compared with physical clamping, air pressure clamping is not likely to cause pipe deformation and will not damage the pipe coating, and it can also effectively clamp the L-shaped pipe during processing.

[0043] S2. During the process of inserting the vertical column 5 into the socket 4, the tooth rack 15 at the bottom end of the spring column 14 inserts into the slot 13, driving the gear 16 to rotate. The inner pin 19 rotates horizontally along with the rotating shaft 17, and the sliding sleeve 20 reciprocates along the traction groove 22 through the convex block 23, and presses down on the main pipe cut when the sliding sleeve 20 slides outwards to ensure that the cut is aligned with the auxiliary pipe. In this way, without the operator having to check and adjust separately, the position adjustment of the main pipe is achieved by using the insertion process of the vertical column 5 in cooperation with the deflection of the sliding sleeve 20.

[0044] S3. After the pipe is welded, rotate the rotating pin 11 to connect the ventilation groove 12 on both sides of the rubber disk 7, and connect the negative pressure area and the welding area. If there is air leakage at the welding position, there is no negative pressure in the pipe. If there is no air leakage at the welding position, there is a certain negative pressure in the pipe. When pulling out the vertical column 5, the airtightness of the welding position can be judged through negative pressure feedback. In this way, the welding effect can be quickly detected by using the pipe disassembly step in cooperation with the negative pressure inside the pipe, without the operator having to detect each pipe fitting one by one again.

[0045] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A clamping device for processing pipe fittings joints, characterized in that, Comprising: A chassis (1) and a fixedly arranged bracket (2); A cross column (3) is horizontally fixed to the bracket (2), one end of which is provided with a socket (4), and a vertical column (5) is vertically inserted into the socket (4) to form a T-shaped structure; Pipe caps (6) are respectively fixed to the non-inserted ends of the vertical column (5) and the cross column (3), a rubber disc (7) is fixedly arranged at the axial middle parts of the vertical column (5) and the cross column (3), and a rubber cover (8) is slidably sleeved on the outer surfaces of the vertical column (5) and the cross column (3); Spring blocks (9) are arranged at the ends of the displacement paths of the rubber cover (8), and a negative pressure is formed in the inner cavity of the pipe fitting when the rubber disc (7) and the rubber cover (8) move away from each other.

2. The clamping device for pipe fitting joint processing according to claim 1, characterized in that: Pin slots (10) are formed in the side walls of the vertical column (5) and the cross column (3); A rotating pin (11) penetrates through the pipe cap (6) and is rotatably connected in the pin slot (10), and an air vent groove (12) communicating the two sides of the rubber disc (7) is arranged on the surface of the rotating pin (11).

3. The clamping device for pipe fitting joint processing according to claim 1, characterized in that: A slot (13) is arranged inside the socket (4); The bottom end of the vertical column (5) is inserted with a spring column (14), a tooth rack (15) is fixed to the bottom of the spring column (14), and a gear (16) and a rotating shaft (17) meshing with the tooth rack (15) are arranged in the slot (13); The rotating shaft (17) is automatically reset through a torsion spring (18); An inner pin (19) is radially fixed to the rotating shaft (17), and a sliding sleeve (20) is slidably sleeved on the outer surface of the inner pin (19); A through groove (21) penetrates through the connection part of the socket (4) and the cross column (3); A traction groove (22) is arranged on the inner side wall of the through groove (21), and a convex block (23) fixed to the side surface of the sliding sleeve (20) cooperates with the traction groove (22).

4. A clamping device for processing pipe fittings joints according to claim 1, characterized in that: The rubber disc (7) adopts a replaceable multi-layer rubber gasket structure.

5. The clamping device for pipe fitting joint processing according to claim 3, characterized in that: When the sliding sleeve (20) slides outwards, a positioning pressing block for the cut of the main pipe is formed at its end.

6. The clamping device for pipe fitting joint processing according to claim 3, wherein: Rolling steel balls are embedded in the traction groove (22) to form a rolling friction fit with the convex block (23).

7. The clamping device for pipe fitting joint processing according to claim 3, characterized in that: Synchronization tooth patterns meshing with each other are arranged on the surface of the rotating shaft (17).

8. A method of using a clamping device for pipe fitting joint processing, using a clamping device for pipe fitting joint processing as described in claim 3, characterized in that, Including the following steps: S1. Sleeve the main pipe onto the cross column (3) and the auxiliary pipe onto the vertical column (5). During this process, the rubber disc (7) enters the pipe, the rubber cover (8) buckles on the pipe orifice for sealing, and the continuously moving rubber disc (7) and the rubber cover (8) move in opposite directions to form negative pressure adsorption until the spring block (9) restricts the rubber cover (8) from returning, and then insert the vertical column (5) into the cross column (3) to complete the pipe connection; S2. During the process of inserting the vertical column (5) into the socket (4), the tooth rack (15) at the bottom end of the spring column (14) is inserted into the slot (13), driving the gear (16) to rotate. The inner pin (19) rotates to the horizontal position along with the rotating shaft (17), and the sliding sleeve (20) reciprocates along the traction groove (22) through the convex block (23), and presses the cut of the main pipe when the sliding sleeve (20) slides outwards to ensure that the cut is aligned with the auxiliary pipe; S3. After the pipes are welded, rotate the rotating pin (11) to connect the air vent groove (12) to both sides of the rubber disc (7), so that the negative pressure area is connected to the welding area. If there is air leakage at the welding position, there is no negative pressure in the pipe. If there is no air leakage at the welding position, there is a certain negative pressure in the pipe. When pulling out the vertical column (5), it is possible to judge whether there is air leakage at the welding position through the negative pressure feedback.

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