Roundness calibration device for thermal insulation pipe production

Abstract

The utility model discloses a roundness calibration device for thermal insulation pipe production, and relates to the field of roundness instrument clamping mechanisms, the roundness calibration device comprises a workbench, the top end of the workbench is provided with a clamping mechanism extending to the lower part of the workbench, the top of the clamping mechanism is connected with a rotating rod through a limiting mechanism, and the rotating rod is connected with the workbench. A containing groove is formed in one side of the periphery of the rotating rod, a contact plate is slidably connected into the containing groove, sensing mechanisms are installed at the plane end of the contact plate and the interior of the rotating rod, and the sensing mechanisms are electrically connected with a controller through a conductive mechanism. By arranging the conductive mechanism, the limiting mechanism and the rotating mechanism, when external clamping or internal clamping is carried out and four pressure signals are output consistently, the motor can be controlled by the controller to stop running, and the condition that the pressure is consistent can be realized only when the four contact plates all realize effective contact with the pipe wall; therefore, the situation that the clamping force is too large is avoided.

Description

Technical Field

[0001] The utility model relates to the field of roundness instrument clamping mechanisms, in particular to a roundness calibration device for the production of thermal insulation pipes. Background Art

[0002] The roundness meter includes a clamping part and a measuring part. The clamping part is used to clamp the pipe fitting, and the measuring part measures the movement of the probe through a sensor (such as an angle displacement sensor or a length sensor), thereby judging whether the pipe fitting meets the standard roundness based on the electrical signal.

[0003] In the steel jacketed steel composite insulation pipe, the steel pipe is generally welded by the seamless steel pipe process. After welding, it needs to be tested with a roundness meter to avoid continuous output. In the prior art, the hollow steel pipe can be clamped by external clamping or internal clamping. The two different clamping methods can be adjusted according to the form of the pipe fittings.

[0004] However, the wall thickness of seamless steel pipes is relatively thin, and the clamping force should not be too large, otherwise it will cause deformation of the pipe wall. Utility Model Content

[0005] The purpose of the utility model is to provide a roundness calibration device for producing thermal insulation pipes in order to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a roundness calibration device for the production of thermal insulation pipes, comprising a workbench, a clamping mechanism extending to the bottom of the workbench is arranged at the top of the workbench, a rotating rod is connected to the top of the clamping mechanism through a limiting mechanism, a receiving groove is opened on one side of the outer circumference of the rotating rod, a contact plate is slidably connected in the receiving groove, a sensing mechanism is installed at the plane end of the contact plate and inside the rotating rod, and the sensing mechanism is electrically connected to a controller through a conductive mechanism;

[0007] The clamping mechanism is used to position and clamp the pipe fittings, so that the centers of different pipe fittings are always located at the same point;

[0008] The clamping mechanism is used to adjust the orientation of the contact plate to achieve internal clamping or external clamping of the pipe;

[0009] The limiting mechanism is used to limit the maximum rotation angle of the contact plate so that it can rotate within one hundred and eighty degrees;

[0010] The sensor mechanism is used to convert the pressure of the contact plate and the pipe into an electrical signal and transmit it to the controller through the conductive mechanism.

[0011] As a further solution of the utility model: the clamping mechanism includes a motor installed under the workbench through a mounting bracket, the output end of the motor is connected to a driving gear, and the outer periphery of the driving gear is meshed with a passive gear;

[0012] The passive gear is provided with an arc-shaped curved groove inside, the top of the workbench is formed with a placement plate, the inner periphery of the placement plate is welded with a fixing plate, and the fixing plate is provided with a straight groove;

[0013] The inner wall of the curved groove is movably connected with a movable rod extending upward and slidably connected to the straight groove, and the rotating rod is rotatably connected to the top of the movable rod through a limiting mechanism.

[0014] As a further solution of the utility model: the limiting mechanism includes a connecting shaft integrally formed at the bottom of the rotating rod, a disc is integrally formed at the bottom end of the connecting shaft, and the connecting shaft and the disc are rotatably connected to the inside of the movable rod.

[0015] As a further solution of the utility model: the limiting mechanism also includes an arc groove which is opened at the top end of the movable rod and is recessed downward, and the inner wall of the arc groove is movably connected to the movable column connected to the bottom end of the rotating rod.

[0016] As a further solution of the utility model: the sensing mechanism includes a pressure sensor fixedly connected to the plane end of the contact plate, and one end of the pressure sensor penetrates into the interior of the rotating rod;

[0017] A groove is provided inside the rotating rod for sliding one end of the pressure sensor, and a piezoresistor electrically connected to the pressure sensor is installed at one end of the pressure sensor, a pressure plate in contact with the piezoresistor is slidably connected in the groove, and a pressure spring is provided in the groove to drive the pressure plate to reset.

[0018] As a further solution of the utility model: the conductive mechanism includes two conductive rings connected to the outer circumference of the disk, and the two conductive rings do not contact each other in the vertical direction;

[0019] The bottom end of the movable rod is connected to a conductive wire that penetrates into the interior of the movable rod, and one end of the conductive wire is connected to a conductive ball;

[0020] An insulating spring is arranged between the conductive ball and the inner wall of the movable rod, and the conductive ball contacts the outer peripheral surface of the conductive ring.

[0021] As a further solution of the utility model: the two conductive rings are electrically connected to the output end and the input end of the pressure sensor respectively through wires.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] 1. By setting up the conductive mechanism, the limit mechanism and the rotating mechanism, whether in external clamping or internal clamping, when the four pressure signal outputs are consistent, the controller can control the motor to stop running. The pressure is consistent only when the four contact plates have achieved effective contact with the pipe wall, thus avoiding the occurrence of excessive clamping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the clamping mechanism of the utility model;

[0026] Figure 3 This is a schematic diagram of the installation of the contact plate of the utility model;

[0027] Figure 4 It is a schematic diagram of the connection between the movable rod and the rotating rod of the utility model;

[0028] Figure 5 For the utility model Figure 4 A partial enlarged view of the middle part;

[0029] Figure 6 It is a schematic diagram of the structure of the limiting mechanism of the utility model.

[0030] In the figure: 1. workbench; 2. mounting bracket; 3. motor; 4. passive gear; 5. placement plate; 6. fixing plate; 7. straight groove; 8. driving gear; 9. curved groove; 10. movable rod; 11. rotating rod; 12. contact plate; 13. connecting shaft; 14. disc; 15. insulating spring; 16. conductive ball; 17. conductive ring; 18. conductive wire; 19. pressure sensor; 20. varistor; 21. pressure plate; 22. pressure spring; 23. arc groove; 24. movable column. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1 to Figure 6In the embodiment of the utility model, a roundness calibration device for the production of thermal insulation pipes includes a workbench 1, a clamping mechanism extending to the bottom of the workbench 1 is arranged at the top of the workbench 1, a rotating rod 11 is connected to the top of the clamping mechanism through a limiting mechanism, a receiving groove is provided on the outer circumference of the rotating rod 11, a contact plate 12 is slidably connected in the receiving groove, a sensing mechanism is installed between the plane end of the contact plate 12 and the inside of the rotating rod 11, and the sensing mechanism is electrically connected to the controller through a conductive mechanism;

[0033] The clamping mechanism is used to position and clamp the pipe fittings, so that the centers of different pipe fittings are always located at the same point;

[0034] The clamping mechanism is used to adjust the orientation of the contact plate 12 to achieve internal or external clamping of the pipe;

[0035] The limiting mechanism is used to limit the maximum rotation angle of the contact plate 12 so that it can rotate within 180 degrees;

[0036] The sensing mechanism is used to convert the pressure of the contact plate 12 and the pipe into an electrical signal and transmit it to the controller through the conductive mechanism.

[0037] In this embodiment: before using the device to calibrate the roundness of the pipe fitting, the pipe fitting is first clamped by a clamping mechanism (it can be clamped by the outer wall or the inner wall, and the clamping method can be selected according to the form of the pipe fitting);

[0038] When clamping the outer wall, the multiple contact plates 12 are uniformly rotated inwardly by 180 degrees, so that the vertical positions of the quadrant points of the multiple contact plates 12 can contact the surface of the pipe.

[0039] Please refer to Figure 1 and Figure 2 The clamping mechanism includes a motor 3 installed under the workbench 1 through a mounting bracket 2, the output end of the motor 3 is connected to a driving gear 8, and the outer periphery of the driving gear 8 is meshed with a passive gear 4;

[0040] The interior of the passive gear 4 is provided with a curved groove 9 in an arc-shaped structure. A placement plate 5 is formed on the top of the workbench 1. A fixing plate 6 is welded to the inner periphery of the placement plate 5. A straight groove 7 is provided on the fixing plate 6.

[0041] The inner wall of the curved groove 9 is movably connected with a movable rod 10 extending upward and slidably connected to the straight groove 7, and the rotating rod 11 is rotatably connected to the top of the movable rod 10 through a limiting mechanism.

[0042] In this embodiment: by starting the motor 3, the motor 3 drives the active gear 8 to rotate, and the active gear 8 drives the passive gear 4 to rotate. At this time, the passive gear 4 drives the curved groove 9 to move synchronously, and the curved groove 9 squeezes the surface of the movable rod 10. After the movable rod 10 is squeezed, it moves along the straight groove 7. Multiple synchronously moving movable rods 10 can drive the contact plate 12 to clamp the inner wall or outer wall of the pipe fitting at multiple points, and the multiple movable rods 10 move synchronously. The movable rod 10 and the contact plate 12 can realize the center of the pipe fitting to be fixed at one point, that is: centering.

[0043] Please refer to Figure 5 and Figure 6 The limiting mechanism includes a connecting shaft 13 integrally formed at the bottom of the rotating rod 11, and a disc 14 is integrally formed at the bottom end of the connecting shaft 13. The connecting shaft 13 and the disc 14 are rotatably connected to the inside of the movable rod 10. The limiting mechanism also includes an arc groove 23 opened at the top of the movable rod 10 and recessed downward, and the inner wall of the arc groove 23 is movably connected to a movable column 24 connected to the bottom end of the rotating rod 11.

[0044] In this embodiment: when the rotating rod 11 is rotated, the rotating rod 11 drives the connecting shaft 13, the disk 14 and the movable column 24 to perform synchronous movements. At this time, the movable column 24 rotates from one end of the arc groove 23 to the other end of the arc groove 23, completing an arc estimation movement of one hundred and eighty degrees. Then the rotating rod 11 can only rotate within the range of one hundred and eighty degrees, thereby realizing the inward or outward rotation adjustment of the contact plate 12 to avoid excessive or insufficient rotation.

[0045] Please refer to Figure 5 , the sensing mechanism includes a pressure sensor 19 fixedly connected to the plane end of the contact plate 12, and one end of the pressure sensor 19 penetrates into the interior of the rotating rod 11;

[0046] A groove is provided inside the rotating rod 11 for sliding one end of the pressure sensor 19, and a piezoresistor 20 electrically connected to the pressure sensor 19 is installed at one end thereof, a pressure plate 21 in contact with the piezoresistor 20 is slidably connected in the groove, and a pressure spring 22 is provided in the groove to drive the pressure plate 21 to reset.

[0047] In this embodiment: when the contact plate 12 contacts the wall of the pipe, the contact plate 12 is forced to drive the pressure sensor 19 to move. At this time, the pressure sensor 19 drives the piezoresistor 20 to push the pressure plate 21, and the pressure spring 22 is compressed by the force. The compression will produce a corresponding reset force. At this time, the reaction force generated by the compression acts on the piezoresistor 20 through the pressure plate 21, and the pressure signal is converted into an electrical signal to the controller. When the currents of the four electrical signals are consistent, it means that the centering clamping of the pipe is completed, and the controller controls the motor 3 to stop running.

[0048] Please refer to Figure 5 The conductive mechanism includes two conductive rings 17 connected to the outer periphery of the disc 14, and the two conductive rings 17 do not contact each other in the vertical direction;

[0049] The bottom end of the movable rod 10 is connected to a conductive wire 18 that penetrates the inside of the movable rod 10 , and one end of the conductive wire 18 is connected to a conductive ball 16 ;

[0050] An insulating spring 15 is provided between the conductive ball 16 and the inner wall of the movable rod 10 . The conductive ball 16 contacts the outer peripheral surface of the conductive ring 17 . The two conductive rings 17 are electrically connected to the output end and the input end of the pressure sensor 19 through wires.

[0051] In this embodiment, the external current transmits electric energy to the pressure sensor 19 through the conductive mechanism connected to the controller and its input end. After the current passes through the varistor 20, it is output from the conductive mechanism at its output end to the controller. The pressure can be measured in real time by the output current.

[0052] When the rotating rod 11 rotates, the rotating rod 11 drives the disk 14 to rotate, and the disk 14 drives the conductive ring 17 to rotate, while the conductive ring 17 and the wire are relatively stationary. Therefore, the rotation does not cause the risk of short circuit of the wire or the conductive mechanism. The insulating spring 15 (the steel spring is wrapped with insulating rubber on the outside) can achieve close contact between the conductive ball 16 and the conductive ring 17 by applying a squeezing force to the conductive ball 16, thereby preventing poor contact.

[0053] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A roundness calibration device for insulating pipe production, comprising a workbench (1), characterized in that: The top of the workbench (1) is provided with a clamping mechanism extending to the bottom of the workbench (1); the top of the clamping mechanism is connected to a rotating rod (11) via a limiting mechanism; a receiving groove is provided on one side of the outer circumference of the rotating rod (11); a contact plate (12) is slidably connected in the receiving groove; a sensing mechanism is installed between the plane end of the contact plate (12) and the inside of the rotating rod (11); the sensing mechanism is electrically connected to a controller via a conductive mechanism; The clamping mechanism is used to position and clamp the pipe fittings, so that the centers of different pipe fittings are always located at the same point; The clamping mechanism is used to adjust the orientation of the contact plate (12) to achieve internal clamping or external clamping of the pipe; The limiting mechanism is used to limit the maximum rotation angle of the contact plate (12) so that it can rotate within one hundred and eighty degrees; The sensing mechanism is used to convert the pressure of the contact plate (12) and the pipe into an electrical signal and transmit it to the controller through the conductive mechanism.

2. A roundness calibration device for insulating pipe production according to claim 1, characterized in that: The clamping mechanism comprises a motor (3) mounted below the workbench (1) via a mounting bracket (2); an output end of the motor (3) is connected to a driving gear (8); and a driven gear (4) is meshed on the outer periphery of the driving gear (8); The passive gear (4) is provided with a curved groove (9) in an arc-shaped structure inside, the top end of the workbench (1) is formed with a placement plate (5), the inner circumference of the placement plate (5) is welded with a fixing plate (6), and the fixing plate (6) is provided with a straight groove (7); The inner wall of the curved groove (9) is movably connected to a movable rod (10) extending upward and slidably connected to the straight groove (7), and the rotating rod (11) is rotatably connected to the top of the movable rod (10) through a limiting mechanism.

3. A roundness calibration device for insulating pipe production according to claim 2, characterized in that: The limiting mechanism comprises a connecting shaft (13) integrally formed at the bottom of the rotating rod (11), a disc (14) integrally formed at the bottom end of the connecting shaft (13), and the connecting shaft (13) and the disc (14) are rotatably connected to the inside of the movable rod (10).

4. A roundness calibration device for insulating pipe production according to claim 3, characterized in that: The limiting mechanism also includes an arc groove (23) which is formed at the top of the movable rod (10) and is recessed downwards, and the inner wall of the arc groove (23) is movably connected to a movable column (24) connected to the bottom end of the rotating rod (11).

5. A roundness calibration device for the production of thermal insulation pipes according to claim 4, characterized in that: The sensing mechanism comprises a pressure sensor (19) fixedly connected to the plane end of the contact plate (12), and one end of the pressure sensor (19) penetrates into the interior of the rotating rod (11); A groove is provided inside the rotating rod (11) for sliding one end of the pressure sensor (19), and a piezoresistor (20) electrically connected thereto is installed at one end of the pressure sensor (19), a pressure plate (21) in contact with the piezoresistor (20) is slidably connected inside the groove, and a pressure spring (22) is provided inside the groove for driving the pressure plate (21) to return to its original position.

6. A roundness calibration device for thermal insulation pipe production according to claim 5, characterized in that: The conductive mechanism comprises two conductive rings (17) connected to the outer periphery of the disk (14), and the two conductive rings (17) do not contact each other in the vertical direction; The bottom end of the movable rod (10) is connected to a conductive wire (18) that penetrates the inside of the movable rod (10), and one end of the conductive wire (18) is connected to a conductive ball (16); An insulating spring (15) is arranged between the conductive ball (16) and the inner wall of the movable rod (10), and the conductive ball (16) is in contact with the outer peripheral surface of the conductive ring (17).

7. A roundness calibration device for thermal insulation pipe production according to claim 6, characterized in that: The two conductive rings (17) are respectively electrically connected to the output end and the input end of the pressure sensor (19) through wires.

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