High-precision self-checking ship body pipe welding positioning device

Abstract

The application discloses a high-precision self-checking ship body pipe welding positioning device and belongs to the technical field of ship manufacturing equipment, which comprises a clamping type positioning mechanism and a lifting type supporting mechanism. The clamping type positioning mechanism comprises an upper clamping platform and a lower clamping platform. The upper clamping platform is provided with a plurality of sliding rails, sliding seats and clamping heads. Each clamping head is provided with a self-checking device composed of a hanging rope shaft, a fixed coil, a self-checking elastic rope one, a force gauge, a threading coil, a self-checking elastic rope two and an alarm. Once the clamping of a clamping head is out of synchronization with other clamping heads, the displacement of the corresponding clamping head will change, the tension of the corresponding self-checking elastic rope one will change, the self-checking elastic rope one uniformly transmits the tension change to the self-checking elastic rope two, the force values of the corresponding force gauge and other force gauges obviously change, and once the change exceeds the normal change range, the alarm will alarm. Through early warning, the staff is reminded to timely maintenance.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding equipment technology, specifically a high-precision self-inspection hull pipe welding positioning device. Background Technology

[0002] In shipbuilding, medium and large-sized pipes (such as keel pipes and support pipes) need to be vertically fixed before welding, but existing welding positioning devices generally have the following problems:

[0003] Lack of synchronization monitoring: Multiple clamps used for positioning the pipe are usually driven synchronously by a single drive assembly. The pins in the drive assembly used for the movement of the transmission rod or transmission disc will wear out over a long period of use. Currently, the wear condition is mainly judged by the experience of the staff and positioning inspection, which has a certain lag. Once wear occurs, it will cause all clamps to drive out of sync, affecting clamping stability and welding accuracy.

[0004] Unstable pipe positioning: The existing welding positioning device uses a fixed support fixture for the pipe. For longer pipes, after the pipe is placed on the support fixture and clamped, the center of gravity of the pipe is too high, which can easily lead to safety accidents due to unstable clamping. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide a high-precision self-inspection welding positioning device for ship hull pipes. By adding a monitoring device at each clamp, the device can realize synchronous self-inspection of clamping, ensure welding accuracy, and solve the problem of lack of synchronous monitoring in existing welding positioning devices.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A high-precision self-inspection type welding positioning device for ship hull pipes includes a clamping positioning mechanism located at the top and a lifting support mechanism coaxially fixed directly below the positioning fixture.

[0008] The clamping positioning mechanism includes an upper clamping platform and a lower clamping platform coaxially fixed directly below the upper clamping platform;

[0009] The surface of the upper clamping platform is equipped with multiple circumferentially arrayed and radially extended slide rails. Each slide rail has a slide block slidably mounted on it. All slide blocks are synchronously driven to slide by a positioning drive assembly mounted on the lower clamping platform. The outer end of each slide block is radially connected to a chuck that can extend beyond the upper clamping platform.

[0010] Its core improvement is that: a vertically arranged hanging rope shaft is fixed at the center of each clamp, and a fixed coil is provided on both sides of each clamp, which is fixed to the surface of the upper clamping platform and is symmetrical about the clamp. A self-testing elastic rope with its center point passing around the outside of the hanging rope shaft is fixed on each of the two fixed coils.

[0011] Above each slide is a force gauge with its measuring end facing the chuck. The measuring end of the force gauge is connected to a threading coil facing the chuck. A self-testing elastic rope is also connected to a self-testing elastic rope 2 with its center point passing through the threading coil. The two connection points of the self-testing elastic rope 2 and the self-testing elastic rope 1 are mirror-symmetrical about the hanging rope axis and the threading coil.

[0012] An alarm is installed on the lower clamping platform, which is electrically connected to all force gauges.

[0013] By adopting the above scheme, when all slides are synchronously driven by a positioning drive assembly, all clamps begin to clamp the pipe synchronously. Once a clamp is not synchronous with other clamps, the displacement of the corresponding clamp will change. At this time, the tension of the corresponding self-testing elastic rope one changes. The self-testing elastic rope one transmits the tension change evenly to the self-testing elastic rope two. At this time, the force values ​​of the corresponding force measuring device and other force measuring devices change significantly. Once it exceeds the normal range of change, the alarm will sound. Through early warning, the staff is reminded to carry out timely maintenance to solve the problem of the lag in "post-inspection".

[0014] As a preferred embodiment of a high-precision self-inspection type hull pipe welding positioning device, in order to improve the real-time monitoring of the tension of the self-inspection elastic rope, the angle between the inflection point of the first self-inspection elastic rope at the rope shaft is made greater than the angle between the inflection point of the second self-inspection elastic rope at the coil, so that the tension difference between the two self-inspection elastic ropes is more obvious and the force measuring device can more sensitively capture the abnormality.

[0015] As a preferred embodiment of a high-precision self-inspection hull pipe welding positioning device, in order to achieve synchronous driving of all clamps in detail, the positioning drive assembly includes a reference base coaxially arranged with the upper clamping platform and flush with the surface of the upper clamping platform. A vertically arranged rotating shaft is coaxially rotatably mounted on the upper part of the reference base. A horizontally arranged transmission disk is coaxially fixed at the upper end of the rotating shaft. The transmission disk is movably connected to the slide block one by one through multiple circumferentially distributed transmission rods.

[0016] The positioning drive assembly also includes a radially distributed swing arm fixed to the lower end of the rotating shaft, and a horizontally arranged hydraulic cylinder is movably mounted on the surface of the lower clamping platform via a mounting seat, wherein the hydraulic rod of the hydraulic cylinder is movably connected to the swing arm.

[0017] As a preferred embodiment of a high-precision self-inspection hull pipe welding positioning device, in order to facilitate the replacement of vulnerable parts, all moving connections in the positioning drive assembly are connected by pins, which facilitates disassembly and replacement.

[0018] The second technical problem to be solved by the present invention is to provide a high-precision self-inspection type welding positioning device for ship hull pipes, which improves the traditional fixed support fixture into a lifting support fixture. For the clamping of long pipes, the device lowers the center of gravity of the pipe, improves welding safety, and solves the problem of unstable pipe positioning in existing welding positioning devices.

[0019] To achieve the above objectives, the present invention provides the following technical solution:

[0020] Based on the above scheme, the lifting support mechanism includes a vertically arranged support arm;

[0021] The core improvement is that vertically arranged slide rails are installed on both the left and right sides of the support arm, and slide blocks are slidably installed on each slide rail. All slide blocks are synchronously driven to slide by a lifting drive assembly installed inside the support arm. A horizontally arranged support arm is fixed on the outside of each slide block, and a horizontally arranged support fixture is fixed on each support arm and is coaxially arranged with the upper clamping platform.

[0022] By adopting the above solution, when the pipe is long, in order to increase the height difference between the pipe support part and the pipe clamping part, the height of the support fixture can be reduced by a lifting support mechanism. This can lower the center of gravity of the pipe, reduce the risk of swaying, and thus improve the stability of the pipe positioning.

[0023] As a preferred embodiment of a high-precision self-inspection hull pipe welding positioning device, in order to support multiple types of pipes, multiple coaxially arranged limiting grooves are provided on the surface of the supporting fixture. All limiting grooves are the same as the step structure and are not on the same horizontal plane. Each limiting groove is matched with a different type of pipe.

[0024] As a preferred embodiment of a high-precision self-inspection type hull pipe welding positioning device, in order to achieve the synchronous lifting of all supporting fixtures, the lifting drive assembly includes a lead screw that is vertically arranged and coaxially rotatably installed inside the support arm, and a lead screw seat is threaded onto the lead screw; lifting rods that are horizontally arranged and pass through the side of the support arm are respectively installed on the left and right sides of the lead screw seat, and all lifting rods are located in clearance grooves that are opened on the left and right sides of the support arm and extend vertically.

[0025] The lifting drive assembly also includes a motor fixed to the outside of the bottom of the support arm. A horizontally arranged drive gear is coaxially connected to the motor shaft, and a vertically arranged and coaxially connected driven gear is connected to the bottom end of the lead screw. The drive gear and the driven gear mesh with each other for transmission. Both the drive gear and the driven gear are helical gears.

[0026] The beneficial effects of this invention are:

[0027] 1. Real-time self-check of clamp synchronization: When all slides are synchronously driven by a positioning drive assembly, all clamps begin to clamp the pipe synchronously. If a clamp is not synchronized with other clamps, the displacement of the corresponding clamp will change. At this time, the tension of the corresponding self-checking elastic rope one changes. The self-checking elastic rope one transmits the tension change evenly to the self-checking elastic rope two. At this time, the force values ​​of the corresponding force gauge and other force gauges change significantly. Once it exceeds the normal range of change, the alarm will sound. Through early warning, the staff is reminded to carry out timely maintenance to solve the problem of the lag in "post-inspection".

[0028] 2. Controllable center of gravity, safe and reliable: When the pipe is long, in order to increase the height difference between the pipe support part and the pipe clamping part, the height of the support fixture can be lowered by the lifting support mechanism, which can lower the center of gravity of the pipe, reduce the risk of swaying, and thus improve the stability of the pipe positioning.

[0029] 3. Precise pipe fixing: The stepped limiting groove of the supporting tooling clamps the pipe, and together with the clamping mechanism, the pipe is fixed in both radial and axial directions. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A three-dimensional structural diagram of a high-precision self-inspection hull pipe welding positioning device in application;

[0032] Figure 2 A three-dimensional structural diagram of a high-precision self-inspection type welding positioning device for ship hull pipes;

[0033] Figure 3 This is a three-dimensional structural diagram of the clamping positioning mechanism;

[0034] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0035] Figure 5 A top view of the clamping positioning mechanism;

[0036] Figure 6 for Figure 5 A magnified view of a section at point B in the middle;

[0037] Figure 7 To display the internal structure of the clamping positioning mechanism horizontally;

[0038] Figure 8 This is a three-dimensional structural diagram of the lifting support mechanism;

[0039] Figure 9 To display the internal structure of the lifting support mechanism vertically;

[0040] Figure 10 for Figure 9 A magnified view of a section at point C.

[0041] In the diagram, the markings are: 1-clamping positioning mechanism; 11-upper clamping platform; 12-lower clamping platform; 13-slide rail one; 14-slide base one; 15-clamp; 16-hanging rope shaft; 17-fixed coil; 18-self-testing elastic rope one; 109-force gauge; 110-threaded coil; 111-self-testing elastic rope two; 112-alarm; 113-reference base; 114-rotating shaft; 115-transmission disc; 116-transmission... 117-Swing arm; 118-Mounting seat; 119-Hydraulic cylinder; 120-Hydraulic rod; 2-Lifting support mechanism; 21-Outrigger; 22-Slide rail II; 23-Slide seat II; 24-Support arm; 25-Support fixture; 26-Limit groove; 27-Screw rod; 28-Screw seat; 29-Lifting rod; 210-Allowing groove; 211-Motor; 212-Driving gear; 213-Driven gear; 3-Pipe. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] like Figures 1 to 2 As shown, a high-precision self-inspection type ship hull pipe welding positioning device is provided, which is used for welding ship hull pipe 3, such as welding reinforcing ribs, connecting structures, etc. on the pipe body of pipe 3. Specifically, it includes a clamping positioning mechanism 1 located at the top and a lifting support mechanism 2 coaxially fixed directly below the positioning fixture.

[0044] like Figures 3 to 4 As shown, the clamping positioning mechanism 1 includes an upper clamping platform 11 and a lower clamping platform 12 coaxially fixed directly below the upper clamping platform 11; the surface of the upper clamping platform 11 is equipped with a plurality of circumferentially arrayed and radially extended slide rails 13, each slide rail 13 is slidably mounted with a slide block 14, all slide blocks 14 are synchronously driven to slide by a positioning drive assembly mounted on the lower clamping platform 12, and the outer end of each slide block 14 is radially connected to a chuck 15 that can extend beyond the upper clamping platform 11.

[0045] like Figure 4 , Figure 7 As shown, a vertically arranged hanging rope shaft 16 is fixed at the center of each clamp 15. On both sides of each clamp 15, there are fixed coils 17 fixed to the surface of the upper clamping platform 11 and mirror-symmetrical about the clamp 15. A self-testing elastic rope 18 with its center point passing around the outside of the hanging rope shaft 16 is fixed to each of the two fixed coils 17. A force measuring device 109 with its force measuring end facing the clamp 15 is installed above each slide 14. The force measuring end of the force measuring device 109 is connected to a threading coil 110 facing the clamp 15. A self-testing elastic rope 111 with its center point passing through the threading coil 110 is also connected to the self-testing elastic rope 18. The two connection points of the self-testing elastic rope 111 and the self-testing elastic rope 18 are mirror-symmetrical about the hanging rope shaft 16 and the threading coil 110. An alarm 112 electrically connected to all the force measuring devices 109 is installed on the lower clamping platform 12. When all slide blocks 14 are synchronously driven to slide by a positioning drive assembly, all clamps 15 begin to synchronously clamp the pipe 3. Once a clamp 15 is not synchronous with other clamps 15, the displacement of the corresponding clamp 15 will change. At this time, the tension of the corresponding self-testing elastic rope 18 changes. The self-testing elastic rope 18 transmits the tension change evenly to the self-testing elastic rope 111. At this time, the force values ​​of the corresponding force gauge 109 and other force gauges 109 change significantly. Once it exceeds the normal range of change, the alarm 112 will sound an alarm. Through early warning, the staff is reminded to carry out timely maintenance to solve the problem of the lag in "post-inspection".

[0046] like Figure 4 As shown, in order to improve the real-time monitoring of the tension of the self-testing elastic rope, the angle between the inflection point of the self-testing elastic rope 18 at the hanging rope axis 16 is greater than the angle between the inflection point of the self-testing elastic rope 111 at the threading loop 110. The tension difference between the two self-testing elastic ropes is more obvious, and the force measuring device 109 can more sensitively detect abnormalities.

[0047] like Figures 5 to 7 As shown, in order to achieve synchronized driving of all chucks 15, the positioning drive assembly includes a reference base 113 coaxially arranged with and flush with the surface of the upper clamping platform 11. A vertically arranged rotating shaft 114 is coaxially rotatably mounted on the upper part of the reference base 113. A horizontally arranged transmission disk 115 is coaxially fixed to the upper end of the rotating shaft 114. The transmission disk 115 is movably connected to the slide block 14 through multiple circumferentially distributed transmission rods 116. The positioning drive assembly also includes a swing arm 117 fixed to the lower end of the rotating shaft 114 and radially distributed. A horizontally arranged hydraulic cylinder 119 is movably mounted on the surface of the lower clamping platform 12 through a mounting base 118. The hydraulic rod 120 of the hydraulic cylinder 119 is movably connected to the swing arm 117.

[0048] Continue as Figures 5 to 7 As shown, to facilitate the replacement of easily damaged parts, all moving connections in the positioning drive assembly are connected by pins, making disassembly and replacement convenient.

[0049] like Figure 8 As shown, the lifting support mechanism 2 includes a vertically arranged support arm 21; vertically arranged slide rails 22 are installed on both the left and right sides of the support arm 21, and a slide block 23 is slidably installed on each slide rail. All slide blocks 23 are synchronously driven to slide by a lifting drive assembly installed inside the support arm 21. A horizontally arranged support arm 24 is fixed to the outside of each slide block 23, and a horizontally arranged support fixture 25 coaxially arranged with the upper clamping platform 11 is fixed on each support arm 24. When the length of the pipe 3 is long, in order to increase the height difference between the support part and the clamping part of the pipe 3, the height of the support fixture 25 can be lowered by the lifting support mechanism 2, which can lower the center of gravity of the pipe 3, reduce the risk of swaying, and thus improve the stability of the positioning of the pipe 3.

[0050] Continue as Figure 8 As shown, in order to support multiple types of pipes 3, multiple coaxially arranged limiting grooves 26 are provided on the surface of the supporting fixture 25. All limiting grooves 26 are the same as the step structure and are not on the same horizontal plane. Each limiting groove 26 is matched with a different type of pipe 3.

[0051] like Figures 8 to 10 As shown, in order to achieve synchronous lifting of all supporting fixtures 25, the lifting drive assembly includes a lead screw 27 that is vertically arranged and coaxially rotatably installed inside the support arm 21. A lead screw seat 28 is threaded onto the lead screw 27. Lifting rods 29 that are horizontally arranged and pass through the side of the support arm 21 are respectively installed on the left and right sides of the lead screw seat 28. All lifting rods 29 are located in clearance slots 210 that are opened on the left and right sides of the support arm 21 and extend vertically. The lifting drive assembly also includes a motor 211 fixed to the bottom of the support arm 21. A horizontally arranged drive gear 212 is coaxially connected to the shaft of the motor 211. A vertically arranged driven gear 213 is coaxially connected to the bottom end of the lead screw 27. The drive gear 212 and the driven gear 213 mesh with each other and are helical gears.

[0052] The working principle of this invention is as follows:

[0053] Working process of clamping positioning mechanism 1:

[0054] Drive the chuck 15 to close: Start the hydraulic cylinder 119, and the hydraulic rod 120 pushes the swing arm 117 to rotate around the rotating shaft 114; the rotating shaft 114 drives the transmission plate 115 to rotate, and pushes the slide block 14 to slide radially along the slide rail 13 through the transmission rod 116; the chuck 15 extends out of the upper clamping platform 11 to clamp the pipe 3.

[0055] Real-time synchronous monitoring: When all slide blocks 14 are synchronously driven to slide by a positioning drive assembly, all clamps 15 begin to synchronously clamp the pipe 3. Once a clamp 15 is not synchronous with other clamps 15, the displacement of the corresponding clamp 15 will change. At this time, the tension of the corresponding self-testing elastic rope 18 changes. The self-testing elastic rope 18 evenly transmits the tension change to the self-testing elastic rope 211. At this time, the force values ​​of the corresponding force gauge 109 and other force gauges 109 change significantly. Once it exceeds the normal range of change, the alarm 112 will sound an alarm, reminding the staff to carry out timely maintenance through early warning.

[0056] Working process of lifting support mechanism 2:

[0057] Fixed pipe 3: The stepped structure of the limiting groove 26 holds the pipe 3 in place to prevent it from moving radially; together with the clamp 15 of the clamping positioning mechanism 1, the pipe 3 is "double fixed from top to bottom" to ensure stability during welding.

[0058] Adjusting the support height: Start the motor 211, the drive gear 212 rotates, driving the driven gear 213 to rotate; the lead screw 27 rotates accordingly, the lead seat 28 rises and falls along the lead screw 27, and through the lifting rod 29 drives the slide seat 23 to slide along the slide rail 22, and the support arm 24 rises and falls synchronously.

[0059] Supporting pipe 3 and lowering the center of gravity: When the length of pipe 3 is long, in order to increase the height difference between the support part of pipe 3 and the clamping part of pipe 3, the height of the support fixture 25 can be lowered by the lifting support mechanism 2, which can lower the center of gravity of pipe 3, reduce the risk of shaking, and thus improve the positioning stability of pipe 3.

[0060] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-precision self-inspection type welding positioning device for ship hull pipes, comprising a clamping positioning mechanism located at the top and a lifting support mechanism coaxially fixed directly below the positioning fixture; The clamping positioning mechanism includes an upper clamping platform and a lower clamping platform coaxially fixed directly below the upper clamping platform; The surface of the upper clamping platform is equipped with multiple circumferentially arrayed and radially extended slide rails. Each slide rail has a slide block slidably mounted on it. All slide blocks are synchronously driven to slide by a positioning drive assembly mounted on the lower clamping platform. The outer end of each slide block is radially connected to a chuck that can extend beyond the upper clamping platform. Its features are: At the center of each clamp is a vertically arranged hanging rope shaft. On both sides of each clamp are fixed coils that are fixed to the surface of the upper clamping platform and are mirror-symmetrical about the clamp. On each of the two fixed coils is a self-testing elastic rope whose center point passes around the outside of the hanging rope shaft. Above each slide is a force gauge with its measuring end facing the chuck. The measuring end of the force gauge is connected to a threading coil facing the chuck. A self-testing elastic rope is also connected to a self-testing elastic rope two with its center point passing through the threading coil. The two connection points of the self-testing elastic rope two and the self-testing elastic rope one are mirror symmetrical about the hanging rope axis and the threading coil. An alarm is installed on the lower clamping platform, which is electrically connected to all force measuring instruments. The self-testing elastic rope one transmits the tension change evenly to the self-testing elastic rope two. At this time, the force value of the corresponding force measuring instrument and other force measuring instruments changes significantly. Once it exceeds the normal range of change, the alarm will sound.

2. The high-precision self-inspection type ship hull pipe welding positioning device according to claim 1, characterized in that: The angle at the inflection point of the self-testing elastic rope one at the hanging rope axis is greater than the angle at the inflection point of the self-testing elastic rope two at the loop.

3. The high-precision self-inspection type ship hull pipe welding positioning device according to claim 1, characterized in that: The positioning drive assembly includes a reference base coaxially arranged with the upper clamping platform and flush with the surface of the upper clamping platform, and a vertically arranged rotating shaft is rotatably mounted on the upper coaxial of the reference base; The upper end of the rotating shaft is coaxially fixed with a horizontally arranged transmission disk, and the transmission disk is movably connected to the slide block through multiple circumferentially distributed transmission rods.

4. The high-precision self-inspection type ship hull pipe welding positioning device according to claim 3, characterized in that: The positioning drive assembly also includes a swing arm fixed to the lower end of the rotating shaft and radially distributed. A horizontally arranged hydraulic cylinder is movably mounted on the surface of the lower clamping platform via a mounting seat, wherein the hydraulic rod of the hydraulic cylinder is movably connected to the swing arm.

5. The high-precision self-inspection type ship hull pipe welding positioning device according to claim 4, characterized in that: All active connections in the positioning drive assembly are connected via pins.

6. The high-precision self-inspection type ship hull pipe welding positioning device according to claim 1, wherein the lifting support mechanism includes a vertically arranged support arm; Its features are: The support arm is equipped with vertically arranged slide rails on both the left and right sides. Each slide rail is slidably mounted with a slide block. All slide blocks are synchronously driven to slide by a lifting drive assembly installed inside the support arm. Each slide block has a horizontally arranged support arm fixed on its outer side. Each support arm has a horizontally arranged support fixture that is coaxial with the upper clamping platform.

7. The high-precision self-inspection type ship hull pipe welding positioning device according to claim 6, characterized in that: The surface of the supporting fixture is provided with multiple coaxially arranged limiting grooves. All limiting grooves are the same as the step structure and are not on the same horizontal plane.

8. The high-precision self-inspection type ship hull pipe welding positioning device according to claim 6, characterized in that: The lifting drive assembly includes a lead screw that is vertically arranged and coaxially rotatably mounted inside the support arm, and a lead screw seat is threaded onto the lead screw; The left and right sides of the screw seat are respectively equipped with horizontally arranged lifting rods that pass through the side of the support arm. All lifting rods are located in the clearance grooves opened on the left and right sides of the support arm and extending vertically.

9. The high-precision self-inspection type ship hull pipe welding positioning device according to claim 8, characterized in that: The lifting drive assembly also includes a motor fixed to the outside of the bottom of the support arm. A horizontally arranged drive gear is coaxially connected to the motor shaft, and a vertically arranged and coaxially connected driven gear is connected to the bottom end of the lead screw. The drive gear and the driven gear mesh with each other for transmission.

10. The high-precision self-inspection type ship hull pipe welding positioning device according to claim 9, characterized in that: Both the driving gear and the driven gear are helical gears.

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