A clamping device for pipe joint processing and use method

Abstract

The present invention relates to the technical field of pipe joint processing, and specifically to a clamping device for pipe joint processing and a method for use thereof, comprising a chassis for floor placement, wherein a horizontal column supporting a main pipe is fixedly provided on the chassis via a bracket, and a socket is provided on the upper side of the end of the horizontal column. With this clamping device for pipe joint processing and a method for use thereof, when the main pipe / auxiliary pipe are respectively inserted into the horizontal column / vertical column, the rubber disc automatically enters the pipe cavity, the sliding rubber cover forms a seal with the pipe mouth, the relative displacement of the rubber disc and the rubber cover generates a negative pressure adsorption force, the spring block locks the end point of the displacement, and the pneumatic fixing method avoids the deformation risk of traditional clamps, and is particularly suitable for processing different T / L-type pipes. When the vertical column is inserted into the socket, the rack drives the gear set to rotate, and the inner pin is driven to a horizontal position through the deflection system. The sliding sleeve protrusion moves along the traction groove, and when sliding outward, it automatically presses down the main pipe cut to achieve precise alignment with the auxiliary pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe joint processing, and in particular to a clamping device for pipe joint processing and a use method thereof. Background Art

[0002] In the actual processing and manufacturing of special-shaped pipe fittings, such as tees, the actual processing work requires the assembly and welding of pipe fittings and grinding. Common tees are made by opening a "V"-shaped groove on the main pipe and then grinding a "V" shape on both sides of the branch pipe to assemble and weld the main pipe and the branch pipe. In actual processing, the assembly accuracy of pipe fittings is directly related to the processing quality of special-shaped pipes. Currently, the main pipe and the branch pipe are usually clamped and connected with each other by a fixture before subsequent processing.

[0003] The traditional pipe clamping process mainly relies on mechanical clamps or bolt fixation, which has the following defects:

[0004] Physical damage risk: Rigid clamping can easily cause pipe deformation or coating peeling, especially for thin-walled pipes or L-shaped pipes;

[0005] High dependence on manual labor: the incision alignment needs to be adjusted repeatedly, and a separate airtightness test is required after welding, which is inefficient;

[0006] Single function: The clamping and detection steps are separated, which increases the complexity of the process.

[0007] In view of this, we propose a clamping device for pipe joint processing and a method of use. Summary of the Invention

[0008] The purpose of the present invention is to provide a clamping device for pipe joint processing and a method for use thereof, so as to address the problems of the prior art mentioned in the above-mentioned background art, namely, the risk of physical damage, high dependence on manual labor, and single functionality. To achieve the above-mentioned purpose, the present invention provides the following technical solution: a clamping device for pipe joint processing, comprising a chassis for floor placement, a horizontal column supporting a main pipe fixedly mounted on the chassis via a bracket, and a socket provided on the upper side of the end of the horizontal column, into which a vertical column supporting a secondary pipe is inserted;

[0009] The ends of the vertical column and the horizontal column away from the plug-in portion are fixedly provided with a pipe cover clamped in the pipe opening;

[0010] The vertical and horizontal columns are fixedly provided with a rubber disc that is inserted into the tube, and the vertical and horizontal columns are slidably provided with a rubber cover that seals the tube opening. The vertical and horizontal columns are provided with a spring block that limits the return of the rubber cover. When the rubber disc and the rubber cover are displaced away from each other, negative pressure is generated in the tube.

[0011] Preferably, the side surfaces of the vertical column and the horizontal column are provided with pin grooves, and a rotating pin is rotatably connected in the pin groove. The rotating pin passes through the tube cover and extends to the outside, and a ventilation groove is provided on the surface of the rotating pin for connecting the spaces on both sides of the rubber disc.

[0012] Preferably, a slot is provided on the surface of the horizontal column on the inner side of the socket, a spring column is movably inserted into the bottom end of the vertical column, and a tooth rack inserted into the slot is fixedly provided at the bottom end of the spring column, two rotating shafts are rotatably connected in the slot, and the rotating shafts are provided with gears meshing with the tooth racks, and the rotating shafts are provided with torsion springs for returning the shafts to their original positions;

[0013] The side surface of the rotating shaft is fixedly connected with an inner pin, and a sliding sleeve is slidably connected to the inner pin. A through groove connected to the slot is provided on the socket and the cross column. When the gear rack pushes the rotating shaft to rotate, the inner pin and the sliding sleeve rotate to a horizontal position along the through groove. A traction groove is provided on the inner side wall of the through groove. A protrusion is fixedly provided on the side surface of the sliding sleeve. When the inner pin rotates to a horizontal position, the protrusion drives the sliding sleeve to slide outward and retract back and forth along the traction groove, and when the sliding sleeve slides outward, it is pressed down into the incision of the main pipe, pushing the main pipe to keep the incision facing upward.

[0014] Preferably, the rubber disc adopts a replaceable multi-layer rubber gasket structure.

[0015] Preferably, when the sliding sleeve slides outward, its end forms a positioning pressing block for the main pipeline cutout.

[0016] Preferably, rolling steel balls are embedded in the traction grooves to form rolling friction fit with the protrusions.

[0017] Preferably, the surface of the rotating shaft is provided with mutually meshing synchronous teeth.

[0018] A method for using a clamping device for pipe joint processing comprises the following steps:

[0019] S1. Insert the main pipe into the horizontal column and the auxiliary pipe into the vertical column. During this process, the rubber disc enters the pipe and the rubber cover is buckled on the pipe mouth to seal it. The continuously moving rubber disc and rubber cover move in opposite directions to form negative pressure adsorption until the spring block restricts the rubber cover to return to its position. Then insert the vertical column into the horizontal column to complete the pipe docking.

[0020] S2. When the vertical column is inserted into the socket, the gear rack at the bottom of the spring column is inserted into the slot, driving the gear to rotate, and the inner pin rotates to a horizontal position along the rotating shaft. The sliding sleeve reciprocates along the traction groove through the protrusion and presses down the main pipe cut when the sliding sleeve slides outward to ensure that the cut is aligned with the secondary pipe.

[0021] S3. After the pipeline is welded, rotate the rotating pin to connect the ventilation grooves on both sides of the rubber disc, and connect the negative pressure area with the welding area. If there is a leak at the welding position, there will be no negative pressure in the pipe. If there is no leak at the welding position, there will be a certain negative pressure in the pipe. When the vertical column is pulled out, the negative pressure feedback can be used to determine whether the welding position is leaking.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In the present invention, the negative pressure clamping system: when the main pipeline / auxiliary pipeline is respectively inserted into the horizontal column / vertical column, the rubber disc automatically enters the tube cavity, the sliding rubber cover forms a seal with the tube mouth, the relative displacement of the rubber disc and the rubber cover generates negative pressure adsorption force, the spring block locks the displacement end point, and the air pressure fixing method avoids the deformation risk of traditional clamps, which is especially suitable for the processing of different T / L-shaped pipe fittings.

[0024] In the present invention, the self-alignment mechanism is as follows: when the vertical column is inserted into the socket, the gear rack drives the gear set to rotate, and the inner pin is driven to the horizontal position through the deflection system. The sliding sleeve protrusion moves along the traction groove, and when sliding outward, it automatically presses down the main pipe cut to achieve precise alignment with the auxiliary pipe.

[0025] In the present invention, the quality inspection system: rotate the rotating pin to connect the ventilation groove to the welding area and the negative pressure chamber, and judge the air tightness by maintaining the negative pressure when pulling out the vertical column (no negative pressure = leakage, negative pressure = sealing). The device realizes the automation of the entire process of clamping-positioning-inspection through mechanical linkage, which significantly improves the processing efficiency of special-shaped pipe fittings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the T-shaped pipe clamping of the present invention;

[0027] Figure 2 This is a schematic diagram of the L-shaped pipe clamping of the present invention;

[0028] Figure 3 This is a three-dimensional cross-sectional view of the T-shaped pipe clamping state of the present invention. Figure 1 ;

[0029] Figure 4 This is a three-dimensional cross-sectional view of the T-shaped pipe clamping state of the present invention. Figure 2 ;

[0030] Figure 5 The three-dimensional structure of the horizontal column of the present invention is cut away Figure 1 ;

[0031] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0032] Figure 7 The three-dimensional structure of the horizontal column of the present invention is cut away Figure 2 ;

[0033] Figure 8 It is a three-dimensional structural cross-sectional view of the horizontal column and the socket of the present invention;

[0034] Figure 9 Schematic diagram of the three-dimensional structure of the vertical column of the present invention;

[0035] Figure 10 The three-dimensional structure of the vertical column of the present invention is cut away Figure 1 ;

[0036] Figure 11 For the present invention Figure 10 Enlarged view of point B in the middle;

[0037] Figure 12 This is a cross-sectional view of the three-dimensional structure of the vertical column of the present invention Figure 2 .

[0038] In the figure: 1. chassis; 2. bracket; 3. horizontal column; 4. socket; 5. vertical column; 6. pipe cover; 7. rubber disc; 8. rubber cover; 9. spring block; 10. pin groove; 11. rotating pin; 12. vent groove; 13. slot; 14. spring column; 15. gear rack; 16. gear; 17. rotating shaft; 18. torsion spring; 19. inner pin; 20. sliding sleeve; 21. through groove; 22. traction groove; 23. bump. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technical personnel in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] See also Figures 1 to 12 The present invention provides a technical solution: a clamping device for pipe joint processing, comprising a chassis 1 for ground placement, a horizontal column 3 for carrying the main pipeline fixedly provided on the chassis 1 through a bracket 2, and a socket 4 is provided on the upper side of the end of the horizontal column 3, and a vertical column 5 for carrying the secondary pipeline is inserted into the socket 4.

[0041] The ends of the vertical column 5 and the horizontal column 3 away from the plug-in portion are fixedly provided with a pipe cover 6 that is clamped on the pipe opening. For T-shaped pipes, a separate pipe cover 6 is required to close the remaining pipe opening.

[0042] A rubber disc 7 that is inserted into the tube is fixedly provided on the vertical column 5 and the horizontal column 3, and a rubber cover 8 that seals the tube mouth is slidably provided on the vertical column 5 and the horizontal column 3. A spring block 9 that limits the return of the rubber cover 8 is provided on the vertical column 5 and the horizontal column 3. When the rubber disc 7 and the rubber cover 8 are displaced away from each other, negative pressure is created in the tube.

[0043] The side surfaces of the vertical column 5 and the horizontal column 3 are both provided with a pin groove 10, and a rotating pin 11 is rotatably connected in the pin groove 10. The rotating pin 11 passes through the pipe cover 6 and extends to the outside, and a ventilation groove 12 is provided on the surface of the rotating pin 11 for connecting the spaces on both sides of the rubber disc 7.

[0044] A slot 13 is provided on the surface of the horizontal column 3 on the inner side of the socket 4, and a spring column 14 is movably inserted into the bottom end of the vertical column 5, and a gear rack 15 inserted into the slot 13 is fixedly provided at the bottom end of the spring column 14. Two rotating shafts 17 are rotatably connected in the slot 13, and a gear 16 meshing with the gear rack 15 is provided on the rotating shaft 17, and a torsion spring 18 is provided on the rotating shaft 17 to reset it.

[0045] An 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. A through groove 21 connected to the slot 13 is provided on the socket 4 and the cross column 3. When the gear rack 15 pushes the rotating shaft 17 to rotate, the inner pin 19 and the sliding sleeve 20 rotate to a horizontal position along the through groove 21. A traction groove 22 is provided on the inner side wall of the through groove 21. A protrusion 23 is fixedly provided on the side surface of the sliding sleeve 20. When the inner pin 19 rotates horizontally, the protrusion 23 drives the sliding sleeve 20 to slide outward and retract back and forth along the traction groove 22, and when the sliding sleeve 20 slides outward, it is pressed down into the incision of the main pipe, pushing the main pipe to keep the incision facing upward.

[0046] Structural embodiment

[0047] 1. Main frame and infrastructure

[0048] Chassis: Made of HT250 cast iron, with 4 sets of M12 anchor bolt mounting holes at the bottom for device fixation.

[0049] Bracket: It is welded from Q235B steel pipe with an inclination angle of 15°. A horizontal column is welded on the top. The surface of the horizontal column is hard chrome-plated (thickness 5μm) and a socket is provided at the front end.

[0050] Vertical column: The material is 45# steel that has been quenched and tempered. The bottom end is connected to the gear frame through a spring column. The preload stroke of the spring column is 30mm.

[0051] 2. Negative pressure clamping system

[0052] Rubber disc: It adopts a replaceable three-layer composite structure (outer layer NBR rubber thickness 3mm, middle layer EPDM thickness 2mm, inner layer silicone thickness 1mm), and the outer diameter is interference fit with the inner diameter of the main pipe (interference amount 0.5-1mm).

[0053] Rubber cover: It is an annular rubber seal that slides onto the outer surface of the column.

[0054] Spring blocks: symmetrically distributed on both sides of the rubber cover, the wedge-shaped lock tongue at the end is pressed into the column and then pops out to lock the rubber cover.

[0055] 3. Self-alignment mechanism

[0056] Gear transmission group: Two rotating shafts are symmetrically installed in the slot, the end gear module is 2.5, and the side wall is provided with synchronous tooth pattern.

[0057] 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 protrusion moves along the traction groove, and a Φ3mm steel ball is embedded in the groove to form rolling friction.

[0058] Torsion spring reset: torque coefficient 0.8N·m / rad.

[0059] 4. Welding detection module

[0060] Rotation pin: material 304 stainless steel, outer diameter Φ8mm, rotation angle 180°±2°.

[0061] Negative pressure feedback: The ventilation groove connects the welding area and the negative pressure chamber, and the pressure change is monitored by a vacuum gauge.

[0062] Functional implementation example

[0063] Pipe clamping: The rubber disc and rubber cover move in opposite directions to form negative pressure, and the spring block is locked to achieve deformation-free fixation.

[0064] Cut alignment: The rack drives the gear to rotate, and the sleeve slides outward to press down on the pipe cut.

[0065] Airtightness test: If the negative pressure drop is ≤5% within 30 seconds, the seal is qualified.

[0066] A method for using a clamping device for pipe joint processing comprises the following steps:

[0067] S1. Insert the main pipe into the horizontal column 3 and the auxiliary pipe into the vertical column 5. During this process, the rubber disc 7 enters the pipe and the rubber cover 8 is buckled on the pipe mouth to seal it. 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 to its original position. Then, insert the vertical column 5 into the horizontal column 3 to complete the pipe docking. In this way, the negative pressure space formed inside the pipe is used to fix the pipe on the column. Compared with physical clamping, pneumatic clamping is less likely to cause pipe deformation and will not damage the pipe coating. It can also effectively clamp L-shaped pipes.

[0068] S2. During the process of inserting the vertical column 5 into the socket 4, the gear rack 15 at the bottom end of the spring column 14 is inserted into the slot 13, the driving gear 16 rotates, and the inner pin 19 rotates to a horizontal position along the rotating shaft 17. The sliding sleeve 20 reciprocates along the traction groove 22 through the protrusion 23, and presses down the main pipe cut when the sliding sleeve 20 slides outward to ensure that the cut is aligned with the secondary pipe. In this way, the position of the main pipe can be adjusted by utilizing the plug-in process of the vertical column 5 and the deflection of the sliding sleeve 20 without the need for the operator to check and adjust separately.

[0069] S3. After the pipeline is welded, the rotating pin 11 is rotated to connect the vent groove 12 to both sides of the rubber disc 7. The negative pressure area is connected to the welding area. If there is a leak at the welding position, there will be no negative pressure in the pipe. If there is no leak at the welding position, there will be a certain negative pressure in the pipe. When the vertical column 5 is pulled out, it can be judged whether the welding position is leaking through the negative pressure feedback. In this way, the welding effect can be quickly detected by using the pipeline disassembly steps and the negative pressure in the pipe, without the operator having to check the pipe fittings one by one again.

[0070] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping device for pipe joint processing, characterized in that: include: A chassis (1) and a fixed bracket (2); The horizontal column (3) is fixed horizontally to the bracket (2), and a socket (4) is provided at one end thereof. The vertical column (5) is vertically plugged into the socket (4) to form a T-shaped structure; The pipe cover (6) is fixed to the non-plug-in end of the vertical column (5) and the horizontal column (3), respectively; the rubber disc (7) is fixedly arranged at the axial middle of the vertical column (5) and the horizontal column (3); and the rubber cover (8) is slidably sleeved on the outer surface of the vertical column (5) and the horizontal column (3); The spring clamp (9) is arranged at the end of the displacement path of the rubber cover (8), and when the rubber disc (7) and the rubber cover (8) move in opposite directions, negative pressure is formed in the inner cavity of the pipe; The side walls of the vertical column (5) and the horizontal column (3) are provided with pin grooves (10); The rotating pin (11) passes through the pipe cover (6) and is rotatably connected in the pin groove (10). The surface of the rotating pin (11) is provided with a vent groove (12) communicating with both sides of the rubber disc (7); A slot (13) is provided inside the socket (4); The bottom end of the vertical column (5) is plugged into the spring column (14), the bottom of the spring column (14) is fixed with a gear rack (15), and the slot (13) is provided with a gear (16) and a rotating shaft (17) that mesh with the gear rack (15); The rotating shaft (17) is automatically reset by a torsion spring (18); The rotating shaft (17) radially fixes the inner pin (19), and the sliding sleeve (20) is slidably sleeved on the outer surface of the inner pin (19); The through groove (21) passes through the connection portion between the socket (4) and the horizontal column (3); The traction groove (22) is provided on the inner side wall of the through groove (21), and the fixed protrusion (23) on the side surface of the sliding sleeve (20) cooperates with the traction groove (22).

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

3. The clamping device for pipe joint processing according to claim 2, characterized in that: When the sliding sleeve (20) slides outward, its end forms a positioning pressing block for the main pipeline cutout.

4. The clamping device for pipe joint processing according to claim 3, characterized in that: The traction groove (22) is embedded with a rolling steel ball, which forms a rolling friction fit with the protrusion (23).

5. The clamping device for pipe joint processing according to claim 4, characterized in that: The surface of the rotating shaft (17) is provided with mutually meshing synchronous tooth patterns.

6. A method for using a clamping device for processing a pipe joint, using the clamping device for processing a pipe joint according to claim 5, characterized in that: The steps include: S1. Insert the main pipe into the horizontal column (3) and the auxiliary pipe into the vertical column (5). During this process, the rubber disc (7) enters the pipe and the rubber cover (8) is buckled on the pipe mouth to seal it. 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 to its original position. Then, insert the vertical column (5) into the horizontal column (3) to complete the pipe docking. S2. When the vertical column (5) is inserted into the socket (4), the gear rack (15) at the bottom end of the spring column (14) is inserted into the slot (13), the driving gear (16) rotates, the inner pin (19) rotates with the rotating shaft (17) to a horizontal position, and the sliding sleeve (20) reciprocates along the traction groove (22) through the protrusion (23) and presses down the main pipe cut when the sliding sleeve (20) slides outward to ensure that the cut is aligned with the auxiliary pipe; S3. After the pipeline is welded, the rotating pin (11) is rotated to connect the vent groove (12) to both sides of the rubber disc (7). The negative pressure area is connected to the welding area. If there is a leak at the welding position, there is no negative pressure in the pipe. If there is no leak at the welding position, there is a certain negative pressure in the pipe. When the vertical column (5) is pulled out, it can be judged whether the welding position is leaking through the negative pressure feedback.

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