Positioning and mounting method of a rabble tube hanger base

Abstract

The application relates to the technical field of ship building, and discloses a positioning and mounting method of a harrow pipe hanger base, which comprises the following steps: S1, manufacturing a first dummy shaft and a second dummy shaft; S2, accurately positioning and symmetrically spot welding three harrow pipe hanger bases; S3, respectively threading the first dummy shaft and the second dummy shaft into corresponding shaft holes of the harrow pipe hanger bases; S4, assembling a supporting system for the first dummy shaft and the second dummy shaft; S5, symmetrically positioning and welding the lower sides of the shaft holes of the three harrow pipe hanger bases, and then symmetrically welding the harrow pipe hanger bases by adopting double-number welders; S6, removing the supporting system, the first dummy shaft and the second dummy shaft, and debugging the harrow pipe hanger. The harrow pipe hanger base mounting and welding process are optimized, the center lines of the shaft holes of the harrow pipe hanger bases on the mud tank deck are ensured to be parallel to the center lines of the shaft holes of the two harrow pipe hanger bases on the main deck, the installation requirements of the harrow pipe hanger bases are fully met, and the construction quality and the construction efficiency are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shipbuilding, in particular to a positioning and installation method of a rake pipe hanger base. BACKGROUND

[0002] Generally, the side of a rake suction dredger (single side or double side) is equipped with a rake pipe hanger base for fixing and supporting the rake pipe hanger, so that the rake pipe hanger can be lifted and lowered through the extension and retraction of the rake pipe hanger oil cylinder and the rotation of the rake pipe hanger base shafting, and then the rake pipe can be lifted and lowered through the cooperation of the winch, pulley block and steel wire rope, so as to meet the requirements of the rake suction dredger operation.

[0003] The structure of the existing rake pipe hanger base system is shown in Figure 1 and Figure 2 , which is composed of three rake pipe hanger bases 100, two of which are located on the main deck 200 of the rake suction dredger, and the other one is located on the mud tank deck 300 above the main deck 200. The two rake pipe hanger bases 100 on the main deck 200 are used for rotating assembly of the rake pipe hanger, and the rake pipe hanger base 100 on the mud tank deck 300 is used for connecting the hydraulic oil cylinder 400 to provide power for the working position conversion of the rake pipe hanger.

[0004] The structure of the rake pipe hanger base 100 is shown in Figure 3 and Figure 4 , which includes two vertical plates 101 arranged in parallel and spaced apart, and the vertical plates 101 are provided with coaxially arranged shaft holes 102 for assembling the rotating shaft to rotate with the rake pipe hanger. The inclined end faces of the two vertical plates 101 are fixedly connected with a connecting cover plate 103, connecting the two vertical plates 101 as a whole, and the side plates of the two vertical plates 101 are also connected with intermediate elbow plates 104 and end elbow plates 105 arranged in intervals, which strengthen the structure of the two vertical plates 101.

[0005] The existing installation and welding method of the rake pipe hanger base is to install and weld the three rake pipe hanger bases in two stages, respectively. The two rake pipe hanger bases on the main deck are installed and welded first, and then the rake pipe hanger base on the mud tank deck is installed and welded. However, the single rake pipe hanger base lacks sufficient rigid fixation, resulting in excessive welding deformation of the single rake pipe hanger base during welding. After welding of the two rake pipe hanger bases on the main deck, the center lines of the shaft holes are different in degree of deviation, and the coaxiality of the shaft holes is poor. At the same time, after welding of the rake pipe hanger base on the mud tank deck, its shaft hole center line is easy to deviate, and it is difficult to be parallel to the shaft hole center line of the rake pipe hanger base on the main deck. SUMMARY

[0006] The present application aims to provide a positioning and installation method of harrow pipe hanger bases to solve the problems of excessive welding deformation, poor coaxiality of shaft holes and difficulty in parallelizing the center lines of the shaft holes of the three harrow pipe hanger bases in the welding process of the harrow pipe hanger bases in the prior art.

[0007] To achieve the above-mentioned purpose, the present application provides a positioning and installation method of harrow pipe hanger bases, comprising the following steps: S1, manufacturing a first dummy shaft for penetrating into two harrow pipe hanger bases on a main deck and a second dummy shaft for penetrating into a harrow pipe hanger base on a mud tank deck, the center line of the first dummy shaft is concentrically arranged with the center lines of the shaft holes of the two harrow pipe hanger bases, and the center line of the second dummy shaft is concentrically arranged with the center line of the shaft hole of the harrow pipe hanger base on the mud tank deck;

[0008] S2, precisely positioning the three harrow pipe hanger bases by using laser technology according to the three-dimensional space coordinates of the three harrow pipe hanger bases, and symmetrically spot welding the edges and corners of the harrow pipe hanger bases;

[0009] S3, penetrating and installing the first dummy shaft in the shaft holes of the two harrow pipe hanger bases on the main deck and penetrating and installing the second dummy shaft in the shaft hole of the harrow pipe hanger base on the mud tank deck, and the two ends of the first dummy shaft and the second dummy shaft both protrude out of the shaft holes of the harrow pipe hanger bases;

[0010] S4, assembling a support system for the first dummy shaft and the second dummy shaft, including welding and assembling a first inclined support at each end of the first dummy shaft, fixedly connecting the upper ends of the two first inclined supports to form a triangle, welding and assembling a second inclined support at each end of the second dummy shaft, fixedly connecting the upper ends of the two second inclined supports to form a triangle, connecting the upper ends of the two first inclined supports and the two second inclined supports as a whole, and assembling a connecting support at each axial end of the second dummy shaft, the connecting support being connected with the first inclined support and forming a triangle with the second inclined support;

[0011] S5, symmetrically positioning and welding the lower sides of the shaft holes of the three harrow pipe hanger bases, and then symmetrically welding a single harrow pipe hanger base by using two welders at the same time;

[0012] S6, removing the support system, the first dummy shaft and the second dummy shaft, installing the harrow pipe hanger and the hydraulic oil cylinder, and adjusting the harrow pipe hanger through the extension and retraction of the hydraulic oil cylinder.

[0013] Preferably, in step S1, the first dummy shaft and the second dummy shaft both comprise an assembly section located in the shaft hole of the harrow pipe hanger base and in contact with the shaft hole during assembly and a main body section located outside the shaft hole of the harrow pipe hanger base, the outer diameter of the assembly section = the outer diameter of the true shaft of the harrow pipe hanger base + 0.5b, wherein b is the difference between the outer diameter of the true shaft of the harrow pipe hanger base and the inner diameter of the shaft hole.

[0014] Preferably, in step S1, the outer diameter of the main body section is smaller than the outer diameter of the fitting section.

[0015] Preferably, in step S3, the two ends of the first dummy shaft exceed the shaft holes of the two harrow pipe hanger bases on the main deck by 500 mm, and the two ends of the second dummy shaft exceed the shaft holes of the harrow pipe hanger base on the mud tank deck by 500 mm.

[0016] Preferably, in step S4, the support system further comprises a horizontal support, the two ends of the horizontal support being connected to the intersection of the connecting support and the first inclined support.

[0017] Preferably, in step S5, when the positioning and welding is performed, the center of the weld of the positioning and welding is located directly below the center of the shaft hole of the harrow pipe hanger base, the length of the weld of the positioning and welding is 90-110 mm, and the weld of the positioning and welding is welded for at least two layers.

[0018] Preferably, when the symmetrical welding construction is performed on a single harrow pipe hanger base, the even-numbered welders perform the construction in the order from inside to outside and from near to far, with the center line of the shaft hole as the center, wherein the inside is the side close to the center of the two vertical plates, and the near side is the side close to the center line of the shaft hole.

[0019] Preferably, in step S6, before the support system, the first dummy shaft and the second dummy shaft are removed, a non-destructive testing step is further included, after the welding of the welds of all the harrow pipe hanger bases is completed and is left for 24 hours, the welds of the harrow pipe hanger bases are subjected to non-destructive testing, if there are welding defects, the repair processing is performed according to the process requirements until the testing is qualified; after the testing is qualified, the harrow pipe hanger bases are left for another 24 hours, and then the support system is removed.

[0020] Preferably, in step S2, before the harrow pipe hanger base is positioned, the deck in the installation area of the harrow pipe hanger base is measured and calculated using laser technology, and the gap between the lower opening of the harrow pipe hanger base and the deck is not more than 2 mm by combining the three-dimensional coordinate values of the center of the shaft hole of the harrow pipe hanger base and the requirements of the drawings to perform accurate allowance cutting and welding bevel processing on the lower opening of the harrow pipe hanger base.

[0021] Preferably, in step S2, after the welding of the joint of the periphery of the main deck and the mud tank deck is completed, the positioning and installation of the harrow pipe hanger base and the welding construction are performed.

[0022] Compared with the prior art, the positioning and mounting method of the harrow pipe hanger base has the beneficial effects that: since the center lines of the first dummy shaft and the shaft holes of the two harrow pipe hanger bases are concentrically arranged, and the center line of the second dummy shaft and the shaft hole of the harrow pipe hanger base on the mud tank deck are concentrically arranged, when the first dummy shaft is worn into the shaft holes of the two harrow pipe hanger bases on the main deck, and the second dummy shaft is worn into the shaft hole of the harrow pipe hanger base on the mud tank deck, the center lines of the shaft holes of the two harrow pipe hanger bases on the main deck are coaxial after welding; the first inclined support, the second inclined support and the connecting support of the support system form multiple triangles to form a stable overall structure, the stability of the triangle is used to position the first dummy shaft and the second dummy shaft, so that the first dummy shaft and the second dummy shaft can be kept parallel to the greatest extent during welding, and the center lines of the shaft holes of the three harrow pipe hanger bases are parallel; positioning and welding of the harrow pipe hanger base can reduce the deviation of the center line of the shaft hole during welding; two welders simultaneously perform symmetrical welding construction to minimize welding deformation; various ways are used to optimize the installation and welding process of the harrow pipe hanger base, so that the center lines of the shaft holes of the harrow pipe hanger base on the mud tank deck and the center lines of the shaft holes of the two harrow pipe hanger bases on the main deck are parallel after installation and welding, the installation requirements of the harrow pipe hanger base are fully met, and the construction quality and efficiency are greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic view of the harrow pipe hanger base system in the prior art;

[0024] Figure 2 is a left view of the harrow pipe hanger base system of Figure 1

[0025] Figure 3 is a structural schematic view of the harrow pipe hanger base of the harrow pipe hanger base system of Figure 1

[0026] Figure 4 is a left view of the harrow pipe hanger base of Figure 3

[0027] Figure 5 is an assembly schematic view of the support system, the first dummy shaft and the second dummy shaft in the positioning and mounting method of the harrow pipe hanger base of the present application;

[0028] Figure 6 is a welding sequence schematic view of the harrow pipe hanger base in the positioning and mounting method of the harrow pipe hanger base of the present application.

[0029] ​​​In the figure, 1, the first dummy shaft, 2, the second dummy shaft, 3, the first inclined strut, 4, the second inclined strut, 5, the connecting support, 6, the horizontal support, 7, the assembly section, 8, the main body section, 100, the harrow pipe hanger base, 101, the vertical plate, 102, the shaft hole, 103, the connecting cover plate, 104, the middle elbow plate, 105, the end elbow plate, 200, the main deck, 300, the mud tank deck, 400, the hydraulic oil cylinder. DETAILED DESCRIPTION

[0030] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0031] The preferred embodiment of the positioning and installation method of the harrow pipe hanger base of the present application comprises the following steps: S1, manufacturing the first dummy shaft 1 for penetrating into the two harrow pipe hanger bases on the main deck and the second dummy shaft 2 for penetrating into the harrow pipe hanger base on the mud tank deck, the center line of the first dummy shaft 1 is concentrically arranged with the center line of the shaft hole of the two harrow pipe hanger bases, and the center line of the second dummy shaft 2 is concentrically arranged with the center line of the shaft hole of the harrow pipe hanger base on the mud tank deck.

[0032] The two harrow pipe hanger bases on the main deck share the same first dummy shaft 1, which can ensure that the center lines of the shaft holes of the two harrow pipe hanger bases are coaxial after assembly, reducing the deviation between the center lines. The second dummy shaft 2 penetrates into the shaft hole of the harrow pipe hanger base on the mud tank deck, which fixes and restricts the harrow pipe hanger base on the mud tank deck during welding, reducing the deviation of the center line of the shaft hole after welding.

[0033] S2, according to the three-dimensional space coordinates of the three harrow pipe hanger bases, using laser technology to accurately position the three harrow pipe hanger bases respectively, and symmetrically spot welding the corners of the harrow pipe hanger bases.

[0034] Using laser technology to accurately position the harrow pipe hanger base, laser has the characteristics of collimation, which can improve the positioning accuracy of the harrow pipe hanger base, symmetrically spot welding the corners of the harrow pipe hanger base, which can not only reduce the movement of the harrow pipe hanger base, but also adjust the position of the harrow pipe hanger base when it needs to be removed.

[0035] S3, the first dummy shaft 1 in step S1 is penetrated and installed in the shaft hole of the two harrow pipe hanger bases on the main deck, and the second dummy shaft 2 is penetrated and installed in the shaft hole of the harrow pipe hanger base on the mud tank deck, and the two ends of the first dummy shaft 1 and the second dummy shaft 2 both exceed the shaft hole of the harrow pipe hanger base.

[0036] The two ends of the first dummy shaft 1 and the second dummy shaft 2 both exceed the shaft hole of the harrow pipe hanger base, which is convenient for the installation and welding of the support system in the subsequent steps.

[0037] S4, the first dummy shaft 1 and the second dummy shaft 2 are equipped with a support system, including welding a first inclined support 3 at both ends of the first dummy shaft 1 respectively, the upper ends of the two first inclined supports 3 are fixedly connected to form a triangle, welding a second inclined support 4 at both ends of the second dummy shaft 2 respectively, the upper ends of the two second inclined supports 4 are fixedly connected to form a triangle, and the upper ends of the two first inclined supports 3 and the two second inclined supports 4 are connected as a whole, and each end of the second dummy shaft 2 is equipped with a connecting support 5, the connecting support 5 is connected with the first inclined support 3 and forms a triangle with the second inclined support 4.

[0038] The structure of the support system is shown in Figure 5 The first inclined support 3, the second inclined support 4 and the connecting inclined support connect and fix the first dummy shaft 1 and the second dummy shaft 2, so that the two harrow pipe hanger bases on the main deck and the harrow pipe hanger base on the mud tank deck form a stable and rigid limit during welding, and the three form a whole, effectively reducing the deformation of the harrow pipe hanger base during welding and the offset of the shaft hole center line, and ensuring that the shaft hole center line of the harrow pipe hanger base on the mud tank deck after welding is parallel to the shaft hole center line of the two harrow pipe hanger bases on the main deck after welding.

[0039] S5, the lower side of the shaft hole of the three harrow pipe hanger bases is symmetrically positioned and welded, and then a double number of welders simultaneously symmetrically weld a single harrow pipe hanger base.

[0040] Positioning and welding the lower side of the shaft hole can reduce the offset of the shaft hole center line during welding. The deformation amount during welding can be offset by the double number of welders simultaneously symmetrically welding, thereby greatly reducing the welding deformation.

[0041] S6, the support system, the first dummy shaft 1 and the second dummy shaft 2 are removed, the harrow pipe hanger and the hydraulic oil cylinder are installed, and the harrow pipe hanger is adjusted through the extension and retraction of the hydraulic oil cylinder.

[0042] After removing the support system, the first dummy shaft 1 and the second dummy shaft 2, the harrow pipe hanger is adjusted, the installation accuracy of the harrow pipe hanger base can be checked through the adjustment, and after the adjustment is completed, all installation work of the harrow pipe hanger and its base is completed.

[0043] The positioning and installation method optimizes the installation and welding process of the harrow pipe hanger base in multiple ways, ensures that the shaft hole center line of the harrow pipe hanger base on the mud tank deck after welding is parallel to the shaft hole center line of the two harrow pipe hanger bases on the main deck after welding, fully meets the installation requirements of the harrow pipe hanger base, and greatly improves the construction quality and construction efficiency.

[0044] Preferably, in step S1, the first dummy shaft 1 and the second dummy shaft 2 each include an assembly section 7 located in and in contact with the shaft hole of the harpoon hanger base during assembly and a main body section 8 located outside the shaft hole of the harpoon hanger base, the outer diameter of the assembly section 7 = the outer diameter of the harpoon hanger base true shaft + 0.5b, where b is the difference between the outer diameter of the harpoon hanger base true shaft and the inner diameter of the shaft hole.

[0045] The assembly section 7 is the position of the first dummy shaft 1 and the second dummy shaft 2 in contact with the shaft hole of the harpoon hanger base, and the radial gap between the assembly section 7 and the shaft hole will cause the center line of the shaft hole of the harpoon hanger base to deviate during welding. After the outer diameter of the assembly section 7 = the outer diameter of the harpoon hanger base true shaft + 0.5b, the half of the difference between the outer diameter of the harpoon hanger base true shaft and the inner diameter of the shaft hole is compensated into the outer diameter of the assembly section 7, so that the outer diameter of the assembly section 7 is greater than the outer diameter of the harpoon hanger base true shaft, reducing the radial gap between the assembly section 7 and the shaft hole, thereby reducing the amount of deviation of the harpoon hanger base during welding.

[0046] In this embodiment, the assembly section 7 is formed by machining processing to ensure the accuracy of the assembly section 7.

[0047] Preferably, in step S1, the outer diameter of the main body section 8 is smaller than the outer diameter of the assembly section 7.

[0048] The main body section 8 is not assembled with the shaft hole of the harpoon hanger base, and reducing the outer diameter can facilitate the installation and removal of the first dummy shaft 1 and the second dummy shaft 2, and can also reduce costs.

[0049] Preferably, in step S3, the two ends of the first dummy shaft 1 exceed the shaft holes of the two harpoon hanger bases on the main deck by 500 mm, and the two ends of the second dummy shaft 2 exceed the shaft hole of the harpoon hanger base on the mud tank deck by 500 mm.

[0050] The axial ends of the first dummy shaft 1 and the second dummy shaft 2 are connected to the support system 5, and the 500 mm exceeding the shaft hole facilitates the connection with the first diagonal brace 3 and the second diagonal brace 4, and can also avoid excessive exposure after being connected to the support system, thereby affecting the working environment of the ship body.

[0051] Preferably, in step S4, the support system further includes a horizontal support 6, and the two ends of the horizontal support 6 are connected to the intersection of the connecting support 5 and the first diagonal brace 3.

[0052] The horizontal support 6 is arranged in parallel with the first dummy shaft 1 and the second dummy shaft 2, which can improve the stability of the entire support system and effectively reduce the deformation of the harpoon hanger base and the amount of deviation of the center line of the shaft hole during the welding process.

[0053] Preferably, in step S5, the center of the tack weld is located directly below the center of the shaft hole of the harrow pipe hanger base, the length of the tack weld is 90-110 mm, and the tack weld is welded at least two layers.

[0054] The shaft hole part of the harrow pipe hanger base is the part assembled with the harrow pipe hanger. The tack welding directly below the center of the shaft hole can improve the accuracy of the position of the shaft hole and effectively reduce the deviation of the center of the shaft hole of the harrow pipe hanger base during welding.

[0055] In the embodiment, the tack welding is performed by CO2 gas shielded welding, the purity of CO2 gas is ≥99.5%, the welding material is 4Y grade E501T-1L flux-cored wire, the diameter of the welding wire is Φ1.2 mm, the welding current is 210-250 A, the welding voltage is 26-29 V, the thickness of a single layer of weld is about 4 mm, and the width of a single pass of weld is ≤15 mm.

[0056] Preferably, when the individual harrow pipe hanger base is welded symmetrically, two welders perform the welding according to the sequence from inside to outside and from near to far, with the center line of the shaft hole as the center, where the inside is the side close to the center of the two vertical plates, and the near side is the side close to the center line of the shaft hole.

[0057] The welding is performed from inside to outside and from near to far with the center line of the shaft hole as the center, and the deformation caused by the welding can be compensated by other positions of the harrow pipe hanger base, thereby reducing the deformation of the shaft hole part.

[0058] In the embodiment, the welding sequence and direction of the harrow pipe hanger base are as shown in Figure 6 The welding is performed according to the sequence from a to l by one person and according to the sequence from a to l by the other person, that is, one person welds process a while the other person welds process a, and the welding is sequentially performed according to the alphabetical order. The arrow direction in the figure is the welding direction.

[0059] In the embodiment, the welding of the harrow pipe hanger base is performed by CO2 gas shielded welding, the purity of CO2 gas is ≥99.5%, the welding material is 4Y grade E501T-1L flux-cored wire, the diameter of the welding wire is Φ1.2 mm, the welding current is 210-250 A, the welding voltage is 26-29 V, the thickness of a single layer of weld is about 4 mm, and the width of a single pass of weld is ≤15 mm.

[0060] Preferably, before the support system, the first dummy shaft 1 and the second dummy shaft 2 are removed in step S6, a non-destructive testing step is further included. After all the welds of the harrow pipe hanger base are welded and placed for 24 hours, the welds of the harrow pipe hanger base are subjected to non-destructive testing. If there is a welding defect, the repair processing is performed according to the process requirements until the testing is qualified. After the testing is qualified, the harrow pipe hanger base is placed for another 24 hours, and then the support system is removed.

[0061] The non-destructive inspection of the weld before the removal of the system can avoid the premature removal of the temporary support system, the incomplete release of the welding stress, and the deviation of the center line of the shaft hole of the harrow pipe hanger base during the removal of the temporary support. The non-destructive inspection is performed 24 hours after the completion of the welding of the weld to ensure that the weld has no welding defects; and the false shaft and the support system can be removed only after 24 hours after the inspection is qualified, so as to fully release the stress and reduce the deformation.

[0062] Preferably, before the positioning of the harrow pipe hanger base in step S2, the deck in the installation area of the harrow pipe hanger base is measured and calculated by using laser technology, and the lower opening of the harrow pipe hanger base is accurately cut and bevel processed in combination with the three-dimensional coordinate values of the shaft hole center of the harrow pipe hanger base and the requirements of the drawings, so that the gap between the lower opening of the harrow pipe hanger base and the deck is not more than 2 mm.

[0063] The lower opening of the harrow pipe hanger base is the part that needs to be welded when the harrow pipe hanger base is installed and contacted with the deck. The accurate excess cutting and bevel processing of the lower opening of the harrow pipe hanger base strictly limits the installation gap of the harrow pipe hanger base, so as to ensure that the gap between the harrow pipe hanger base and the deck after installation meets the design requirements, and also can reduce the deformation amount of the harrow pipe hanger base during welding.

[0064] Preferably, in step S2, after the welding of the joint of the periphery of the main deck and the mud tank deck is completed, the positioning and welding construction of the harrow pipe hanger base are performed.

[0065] The installation timing of the harrow pipe hanger base is adjusted, and after the welding of the joint of the periphery of the main deck and the mud tank deck is completed, the positioning and welding construction of the harrow pipe hanger base are performed, so as to ensure that the main deck and the mud tank deck are in a relatively stable state, and prevent the three-dimensional space coordinates of the harrow pipe hanger base from being adversely changed due to the unstable state of the deck.

[0066] In summary, the embodiment of the present application provides a positioning and installation method of the harrow pipe hanger base, the center line of the first dummy shaft is concentrically arranged with the center line of the shaft hole of the two harrow pipe hanger bases, the center line of the second dummy shaft is concentrically arranged with the center line of the shaft hole of the harrow pipe hanger base on the mud tank deck, when the first dummy shaft is worn into the shaft hole of the two harrow pipe hanger bases on the main deck and the second dummy shaft is worn into the shaft hole of the harrow pipe hanger base on the mud tank deck, the center line of the shaft hole of the two harrow pipe hanger bases on the main deck is coaxial after welding; a plurality of triangles are formed through the first inclined support, the second inclined support and the connecting support of the support system, forming a stable overall structure, the first dummy shaft and the second dummy shaft are positioned by using the stability of the triangle, so that the first dummy shaft and the second dummy shaft can be kept parallel to the greatest extent during the welding process, and then the center lines of the shaft holes of the three harrow pipe hanger bases are parallel; the positioning and welding of the harrow pipe hanger base can reduce the deviation of the center line of the shaft hole during the welding process; two welders simultaneously perform symmetrical welding construction, so that the welding deformation is minimized; a plurality of ways are used to optimize the installation and welding process of the harrow pipe hanger base, so that the center line of the shaft hole of the harrow pipe hanger base on the mud tank deck is parallel to the center line of the shaft hole of the two harrow pipe hanger bases on the main deck after installation and welding, the installation requirements of the harrow pipe hanger base are fully met, and the construction quality and construction efficiency are greatly improved.

[0067] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and replacements without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A method of positioning and installing a rabicart hanger base, characterized in that, The method comprises the following steps: S1, manufacturing a first dummy shaft for penetrating two harrow pipe hanger bases on a main deck and a second dummy shaft for penetrating a harrow pipe hanger base on a mud tank deck, the center line of the first dummy shaft is concentrically arranged with the center line of the shaft hole of the two harrow pipe hanger bases, and the center line of the second dummy shaft is concentrically arranged with the center line of the shaft hole of the harrow pipe hanger base on the mud tank deck; S2, precisely positioning the three harrow pipe hanger bases by using laser technology according to the three-dimensional space coordinates of the three harrow pipe hanger bases, and symmetrically spot welding the edges and corners of the harrow pipe hanger bases; S3, penetrating the first dummy shaft in the shaft hole of the two harrow pipe hanger bases on the main deck and penetrating the second dummy shaft in the shaft hole of the harrow pipe hanger base on the mud tank deck, and the two ends of the first dummy shaft and the second dummy shaft both exceed the shaft hole of the harrow pipe hanger base; S4, assembling a support system for the first dummy shaft and the second dummy shaft, comprising welding and assembling a first inclined support at the two ends of the first dummy shaft respectively, fixedly connecting the upper ends of the two first inclined supports to form a triangle, welding and assembling a second inclined support at the two ends of the second dummy shaft respectively, fixedly connecting the upper ends of the two second inclined supports to form a triangle, and connecting the upper ends of the two first inclined supports and the two second inclined supports as a whole, and assembling a connecting support at each of the two ends of the second dummy shaft in the axial direction, and connecting the connecting support with the first inclined support and forming a triangle with the second inclined support; S5, symmetrically positioning and welding the lower side of the shaft hole of the three harrow pipe hanger bases, and then symmetrically welding a single harrow pipe hanger base by using double-number welders; S6, removing the support system, the first dummy shaft and the second dummy shaft, installing the harrow pipe hanger and the hydraulic oil cylinder, and debugging the harrow pipe hanger through the extension and retraction of the hydraulic oil cylinder.

2. The method of positioning a reeving tube hanger base of claim 1, wherein, In step S1, the first dummy shaft and the second dummy shaft both comprise an assembly section located in the shaft hole of the harrow pipe hanger base and in contact with the shaft hole during assembly and a main body section located outside the shaft hole of the harrow pipe hanger base, and the outer diameter of the assembly section is equal to the outer diameter of the true shaft of the harrow pipe hanger base plus 0.5b, wherein b is the difference between the outer diameter of the true shaft of the harrow pipe hanger base and the inner diameter of the shaft hole.

3. The method of positioning a reeving tube hanger base of claim 2, wherein, In step S1, the outer diameter of the main body section is smaller than the outer diameter of the assembly section.

4. The method of positioning a reeving bracket base of claim 1-3, wherein, In step S3, the two ends of the first dummy shaft exceed the shaft hole of the two harrow pipe hanger bases on the main deck by 500mm, and the two ends of the second dummy shaft exceed the shaft hole of the harrow pipe hanger base on the mud tank deck by 500mm.

5. The method of positioning a reeving hanger base of claim 1-3, wherein, In step S4, the support system further comprises a horizontal support, and the two ends of the horizontal support are connected to the intersection of the connecting support and the first inclined support.

6. The method of positioning a reeving hanger base of claim 1-3, wherein, In step S5, during the positioning and welding, the center of the weld is located directly below the center of the shaft hole of the harrow pipe hanger base, the length of the weld is 90-110mm, and the weld is welded at least two layers.

7. The method of positioning a reeving hanger base of claim 1-3, wherein, During the symmetric welding of a single harrow pipe hanger base, the double-number welders take the center line of the shaft hole as the center and perform the welding from inside to outside and from near to far, wherein the inside is the side close to the center of the two vertical plates, and the near side is the side close to the center line of the shaft hole.

8. The method of positioning a reeving hanger base of claim 1-3, wherein, Before the step S6 of removing the support system, the first dummy shaft and the second dummy shaft, a non-destructive testing step is further included, after all the welding of the welding seams of the harrow pipe hanger base is completed and is placed for 24 hours, the non-destructive testing of the welding seams of the harrow pipe hanger base is performed, if there is a welding defect, the repair processing is performed according to the process requirements until the non-destructive testing is qualified; after the non-destructive testing is qualified, the harrow pipe hanger base is placed for 24 hours again, and then the support system is removed.

9. The method of positioning a reeving hanger base of claim 1-3, wherein, Before the step S2 of positioning the harrow pipe hanger base, the deck of the installation area of the harrow pipe hanger base is measured and calculated by using the laser technology, and the lower opening of the harrow pipe hanger base is accurately cut and welded according to the three-dimensional coordinate values of the shaft hole center of the harrow pipe hanger base and the drawing requirements, so that the gap between the lower opening of the harrow pipe hanger base and the deck is not more than 2 mm.

10. The method of positioning a reeving hanger base of claim 1-3, wherein, In the step S2, after the welding of the joint of the periphery of the main deck and the mud tank deck is completed, the positioning and welding construction of the harrow pipe hanger base are performed.

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