Centering and clamping device for spiral welding steel pipe

Abstract

The utility model discloses a spiral welding steel pipe centering clamping device which comprises a bearing table, a supporting plate and a clamping cylinder, the supporting plate and the clamping cylinder are fixedly installed on the bearing table, and a centering mechanism is arranged on the supporting plate. The centering mechanism comprises a limiting barrel fixedly installed on the outer side wall of the bearing table, the limiting barrel and the clamping barrel are coaxially arranged, an air cylinder is fixedly installed on the inner side wall of the limiting barrel, and a guide round block sliding on the inner wall of the limiting barrel is fixedly installed at the piston end of the air cylinder. Under the interaction of the bearing table, the supporting plate, the clamping barrel, the centering mechanism and the limiting mechanism, the air cylinder and the motor in the centering mechanism can flexibly adjust the position of the centering wheel according to different pipe diameters, accurate centering is achieved, the welding quality is improved, the limiting mechanism in the clamping barrel can effectively prevent steel pipes from moving and shaking in the welding process, and the welding quality is improved. The device is convenient to install and maintain, can adapt to different production environments, and provides reliable guarantee for production of the spiral welding steel pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical manufacturing and metal processing technical field especially relates to spiral weld steel pipe centering clamping device. BACKGROUND

[0002] Spiral weld steel pipe refers to the steel band or steel plate bending deformation into round, square etc. After welding into, the surface has the joint steel pipe. According to the welding method, it can be divided into arc welding pipe, high frequency or low frequency resistance welding pipe, gas welding pipe, furnace welding pipe, bondi pipe etc. According to the weld shape, it can be divided into straight seam welded pipe and spiral weld pipe. Electric welding steel pipe is used in petroleum drilling and mechanical manufacturing industry etc.

[0003] At present, in the process of welding processing of steel pipe, on the one hand, it is difficult to realize accurate centering for steel pipes of different diameters, which can easily lead to welding deviation, affect product quality, on the other hand, there is lack of effective limiting measures in the clamping process, so that the steel pipe is prone to displacement during welding, further reducing the stability and reliability of welding, therefore, we propose spiral weld steel pipe centering clamping device to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the insufficient in the background art, and proposes spiral weld steel pipe centering clamping device.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] Spiral weld steel pipe centering clamping device, including bearing platform and fixedly installed support plate and clamping cylinder on the bearing platform, be provided with centering mechanism on the support plate;

[0007] The centering mechanism includes a limiting cylinder fixedly installed on the outer side wall of the bearing platform, the limiting cylinder and the clamping cylinder are coaxially arranged, a gas cylinder is fixedly installed on the inner side wall of the limiting cylinder, a guide round block is fixedly installed on the piston end of the gas cylinder and slides with the inner wall of the limiting cylinder, a moving disc is fixedly installed on the end of the guide round block, a fixed cavity is formed in the moving disc, a plurality of rectangular holes are formed in the side of the moving disc, the fixed cavity and the rectangular hole are in communication through a connecting hole, a threaded rod is rotatably connected to the inner side wall of the connecting hole, a rectangular block is threadedly connected to the threaded rod and slides with the inner side wall of the rectangular hole, a centering wheel is rotatably connected to the rectangular block, a motor is fixedly installed on the inner side wall of the fixed cavity, a driving gear plate is fixedly connected to the output shaft of the motor, a straight tooth conical gear is fixedly connected to the threaded rod, and the driving gear plate and the plurality of straight tooth conical gears are meshingly connected.

[0008] Preferably, the plurality of rectangular holes are arranged in a ring array on the side of the moving disc with the center of the moving disc as the matrix center.

[0009] Preferably, a threaded hole is formed on the outer wall of the rectangular block, which is suitable for the threaded rod, and the outer wall of the threaded rod is threadedly connected with the inner wall of the threaded hole.

[0010] Preferably, the guide circular block and the moving disc are coaxially arranged.

[0011] Preferably, a limiting mechanism is arranged on the inner wall of the clamping cylinder, which comprises a plurality of concave plates fixedly arranged on the inner wall of the clamping cylinder, a rotating shaft is rotatably connected to the inner wall of the concave plate, and a limiting wheel is fixedly sleeved on the outer wall of the rotating shaft.

[0012] Preferably, the plurality of concave plates in the same plane are arranged in an annular array on the inner wall of the clamping cylinder.

[0013] The spiral welded steel pipe centering and clamping device has the advantages that:

[0014] Under the interaction of the bearing table, the supporting plate, the clamping cylinder, the centering mechanism and the limiting mechanism, the cylinder and the motor in the centering mechanism can flexibly adjust the position of the centering wheel according to different pipe diameters, realize accurate centering, improve the welding quality, and the limiting mechanism in the clamping cylinder can effectively prevent the displacement and shaking of the steel pipe during welding. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The spiral welded steel pipe centering and clamping device provided by the utility model has the advantages that:

[0016] Figure 2 The spiral welded steel pipe centering and clamping device provided by the utility model has the advantages that:

[0017] Figure 3 The spiral welded steel pipe centering and clamping device provided by the utility model has the advantages that:

[0018] In the drawings: 1, bearing table; 2, supporting plate; 3, clamping cylinder; 4, limiting cylinder; 5, cylinder; 6, guide circular block; 7, moving disc; 8, fixed cavity; 9, rectangular hole; 10, threaded rod; 11, rectangular block; 12, centering wheel; 13, motor; 14, driving gear disc; 15, straight tooth conical gear; 16, concave plate; 17, rotating shaft; 18, limiting wheel. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0020] REFERENCE Figures 1-3The application relates to a centering and clamping device for spiral-welded steel pipes, which comprises a bearing table 1, a supporting plate 2 and a clamping cylinder 3 fixedly arranged on the bearing table 1, and a centering mechanism arranged on the supporting plate 2; the centering mechanism comprises a limiting cylinder 4 fixedly arranged on the outer side wall of the bearing table 1, the limiting cylinder 4 and the clamping cylinder 3 are coaxially arranged, a gas cylinder 5 is fixedly arranged on the inner side wall of the limiting cylinder 4, a guide round block 6 is fixedly arranged on the piston end of the gas cylinder 5 and can slide on the inner wall of the limiting cylinder 4, a moving disc 7 is fixedly arranged at the end of the guide round block 6, a fixed cavity 8 is formed in the moving disc 7, a plurality of rectangular holes 9 are formed in the side edge of the moving disc 7, the fixed cavity 8 and the rectangular holes 9 are in communication through connecting holes, a threaded rod 10 is rotatably connected to the inner side wall of the connecting hole, a rectangular block 11 which can slide on the inner side wall of the rectangular hole 9 is threadedly connected to the threaded rod 10, a centering wheel 12 is rotatably connected to the rectangular block 11, a motor 13 is fixedly arranged on the inner side wall of the fixed cavity 8, a driving gear disc 14 is fixedly connected to the output shaft of the motor 13, a straight-tooth conical gear 15 is fixedly connected to the threaded rod 10, and the driving gear disc 14 and the plurality of straight-tooth conical gears 15 are in meshing connection.

[0021] Further explanation, realize the function of centering: the design of the centering mechanism makes the spiral-welded steel pipe be accurately centered, the guide round block 6 and the moving disc 7 are moved by the gas cylinder 5, the driving gear disc 14 is driven to rotate by the motor 13, the driving gear disc 14 is in meshing connection with the plurality of straight-tooth conical gears 15, the threaded rod 10 is driven to rotate, the rectangular block 11 slides in the rectangular hole 9, the position of the centering wheel 12 is changed, and the centering operation of the spiral-welded steel pipe with different diameters is realized.

[0022] Further explanation, the structure is compact and reasonable: the limiting cylinder 4 and the clamping cylinder 3 are coaxially arranged, the stability of the overall structure and the accuracy of the centering operation are ensured, meanwhile, the fixed cavity 8, the rectangular holes 9 and the connecting holes in the moving disc 7 are in communication, and the installation mode of the components makes the layout of the whole centering mechanism compact and facilitates the realization of the centering function.

[0023] As shown in Figure 2 , the plurality of rectangular holes 9 are arranged in a ring array on the side edge of the moving disc 7 with the center of the moving disc 7 as the matrix center.

[0024] Further explanation, this makes the plurality of centering wheels 12 be uniformly distributed on the circumference of the spiral-welded steel pipe, in the centering process, the centering wheels 12 can simultaneously and uniformly act on the steel pipe, the centering precision is improved, and the centering deviation caused by the uneven distribution of the centering wheels 12 is avoided.

[0025] As shown in Figure 2 , a threaded hole matched with the threaded rod 10 is formed in the outer side wall of the rectangular block 11, and the outer side wall of the threaded rod 10 and the inner side wall of the threaded hole are in threaded connection.

[0026] Further illustrate, this threaded connection mode guarantees that the threaded rod 10 can accurately convert the rotary motion into the linear motion of the rectangular block 11 when rotating, so that the position adjustment of the centering wheel 12 is more reliable and accurate, and the normal work of the centering mechanism is ensured.

[0027] As shown in Figure 1 The guide circular block 6 and the moving disc 7 are coaxially arranged.

[0028] Further illustrate, in the process that the cylinder 5 pushes the guide circular block 6 and the moving disc 7 to move, the stable linear motion can be maintained.

[0029] As shown in Figure 1 And Figure 2 The inner side wall of the clamping cylinder 3 is provided with a limiting mechanism, the limiting mechanism comprises a plurality of concave plates 16 fixedly installed on the inner side wall of the clamping cylinder 3, the inner side wall of the concave plate 16 is rotatably connected with a rotating shaft 17, and the outer side wall of the rotating shaft 17 is fixedly sleeved with a limiting wheel 18.

[0030] Further illustrate, through the setting of the concave plate 16, the rotating shaft 17 and the limiting wheel 18, after the spiral welded steel pipe is centered, the spiral welded steel pipe can be assisted and limited, the limiting wheel 18 can play a certain restraining effect in the circumferential direction of the steel pipe, so that the radial displacement or shaking of the steel pipe in the welding process is prevented, and the welding quality and stability are improved.

[0031] As shown in Figure 2 The plurality of concave plates 16 in the same plane are arranged in an annular array on the inner side wall of the clamping cylinder 3.

[0032] Further illustrate, in this way, the plurality of limiting wheels 18 can be uniformly distributed on the circumference of the spiral welded steel pipe, so that the steel pipe can be uniformly limited in the circumferential direction, the limiting effect is further improved, and the stability of the steel pipe in the welding process is ensured.

[0033] The utility model can be described by the following operation mode to explain its function principle:

[0034] Starting the cylinder 5

[0035] The switch of the cylinder 5 is turned on, and the cylinder 5 starts to work, and the piston end pushes the guide circular block 6 to slide in the inner wall of the limiting wheel 18, since the guide circular block 6 and the moving disc 7 are coaxially arranged and fixedly connected, the guide circular block 6 will drive the moving disc 7 to move towards the clamping cylinder 3, until the moving disc 7 approaches the spiral welded steel pipe to be centered.

[0036] Starting the motor 13

[0037] When the mobile disc 7 reaches the appropriate position, the motor 13 installed in the fixed cavity 8 is started, and the output shaft of the motor 13 drives the driving gear disc 14 to rotate. Since the driving gear disc 14 is connected with the plurality of straight-tooth bevel gears 15, the rotation of the driving gear disc 14 drives the synchronous rotation of each straight-tooth bevel gear 15.

[0038] Adjusting the position of the centering wheel 12

[0039] Each straight-tooth bevel gear 15 is fixedly sleeved on the corresponding threaded rod 10, so that the rotation of the straight-tooth bevel gear 15 drives the threaded rod 10 to rotate on the inner side wall of the connecting hole. Since the rectangular block 11 is provided with a threaded hole matched with the threaded rod 10, when the threaded rod 10 rotates, the rectangular block 11 slides on the inner side wall of the rectangular hole 9. Since the plurality of rectangular holes 9 are arranged in a ring array with the center of the mobile disc 7 as the matrix center, the plurality of rectangular blocks 11 synchronously drive the centering wheel 12 connected thereon to move towards or away from the center of the mobile disc 7, until the centering wheel 12 contacts the outer side wall of the spiral welded steel pipe and automatically adjusts the position according to the pipe diameter, so that the steel pipe is in the center position of the mobile disc 7 and the clamping cylinder 3, and the centering operation is completed.

[0040] Limiting operation

[0041] After the spiral welded steel pipe is centered, since the limiting mechanism is arranged on the inner side wall of the clamping cylinder 3, the limiting wheels 18 arranged in a ring array on the concave plates 16 on the inner side wall of the clamping cylinder 3 can assist in limiting the steel pipe. The limiting wheels 18 rotate on the inner side wall of the concave plate 16 through the rotating shaft 17, and form a constraint in the circumferential direction of the steel pipe, so as to prevent the steel pipe from moving radially or shaking in the subsequent welding process.

[0042] Welding operation

[0043] After the spiral welded steel pipe is centered and limited, welding operation can be performed. During the welding process, the centering and clamping device continuously maintains the centered state and the limited state of the steel pipe, so as to ensure the welding quality and stability.

[0044] Turning off the motor 13

[0045] After the welding is completed, the motor 13 is turned off, the motor 13 stops rotating, the driving gear disc 14 no longer drives the straight-tooth bevel gear 15 and the threaded rod 10 to rotate, and the position of the centering wheel 12 stops adjusting.

[0046] Retracting the air cylinder 5

[0047] The switch of the air cylinder 5 is operated to retract the piston end of the air cylinder 5, drive the guide circular block 6 and the mobile disc 7 to return to the initial position.

[0048] Taking out the welded steel pipe

[0049] The welded spiral welded steel pipe is taken out from the clamping cylinder 3, and the whole use process is completed.

[0050] The above merely describes a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any skilled person in the art, according to the technical scheme and the inventive concept of the present application, can make equivalent replacements or changes within the technical range disclosed by the present application, which should be covered within the scope of protection of the present application.

Claims

1. A centering and clamping device for helical welded steel pipes, comprising a load bearing table (1) and a support plate (2) and a clamping cylinder (3) fixedly mounted on the load bearing table (1), characterized in that, The supporting plate (2) is provided with a centering mechanism; The centering mechanism comprises a limiting cylinder (4) fixedly installed on the outer side wall of the bearing table (1), the limiting cylinder (4) and the clamping cylinder (3) are coaxially arranged, a gas cylinder (5) is fixedly installed on the inner side wall of the limiting cylinder (4), a guide round block (6) which is slidable with the inner wall of the limiting cylinder (4) is fixedly installed on the piston end of the gas cylinder (5), a moving disc (7) is fixedly installed on the end of the guide round block (6), a fixed cavity (8) is formed in the moving disc (7), a plurality of rectangular holes (9) are formed in the side edge of the moving disc (7), the fixed cavity (8) and the rectangular holes (9) are in communication through a connecting hole, a threaded rod (10) is rotatably connected to the inner side wall of the connecting hole, a rectangular block (11) which is slidable with the inner side wall of the rectangular hole (9) is threadedly connected to the threaded rod (10), a centering wheel (12) is rotatably connected to the rectangular block (11), a motor (13) is fixedly installed on the inner side wall of the fixed cavity (8), a driving gear disc (14) is fixedly connected to the output shaft of the motor (13), a straight tooth conical gear (15) is fixedly connected to the threaded rod (10), and the driving gear disc (14) and the plurality of straight tooth conical gears (15) are in meshing connection.

2. The centering clamp device for a spiral-welded steel pipe according to claim 1, characterized by The plurality of rectangular holes (9) are arranged in a ring array around the center of the moving disc (7).

3. The centering clamp device for a spiral-welded steel pipe according to claim 1, characterized by A threaded hole matched with the threaded rod (10) is formed in the outer side wall of the rectangular block (11), and the outer side wall of the threaded rod (10) and the inner side wall of the threaded hole are in threaded connection.

4. The centering clamp device for a spiral-welded steel pipe according to claim 1, characterized by The guide round block (6) and the moving disc (7) are coaxially arranged.

5. The centering clamp device for spiral-welded steel pipes according to claim 1, characterized in that, The inner side wall of the clamping cylinder (3) is provided with a limiting mechanism, the limiting mechanism comprises a plurality of concave plates (16) fixedly installed on the inner side wall of the clamping cylinder (3), a rotating shaft (17) is rotatably connected to the inner side wall of the concave plate (16), and a limiting wheel (18) is fixedly connected to the outer side wall of the rotating shaft (17).

6. The centering clamp device for a spiral-welded steel pipe according to claim 5, characterized by The plurality of concave plates (16) in the same plane are arranged in a ring array on the inner side wall of the clamping cylinder (3).

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