A telescopic double-masted derrick for marine engineering survey

Abstract

The present invention relates to a telescopic double-masted derrick for marine engineering survey, comprising a frame body, a top platform, and a crossbeam frame. The frame body comprises an outer bottom frame and an inner upper frame. The horizontal cross-sections of the outer bottom frame and the inner upper frame are both C-shaped. The inner upper frame is sleeved inside the outer bottom frame and can be raised or lowered inside the outer bottom frame. The outer bottom frame is provided with a lifting mechanism and a hydraulic locking mechanism. The top of the outer bottom frame is provided with an adjusting pulley assembly. The bottom of the outer bottom frame is provided with a base connected to the hull. The inner upper frame is provided with a pulley assembly, which can move up and down inside the inner upper frame. The tops of the inner upper frames of the two frames are both connected to the top platform. The two outer bottom frames and the two inner upper frames are connected by a crossbeam frame to form the entire derrick. The derrick can meet the working requirements of long-stroke drilling, high-speed drilling, etc. When in a sailing state, the overall center of gravity of the derrick is at a low position, the oil cylinder is stable, and the low-position load is carried, thereby ensuring the requirements of wind and wave resistance during sailing and ensuring the navigation safety of the drilling ship.

Description

Technical Field

[0001] The present invention relates to the technical field of marine drilling vessels, in particular to a telescopic double-masted derrick for marine engineering surveys. Background Art

[0002] Marine engineering geological survey vessels are used for marine geological exploration. They are used to detect potential geological hazards and construction constraints, and to evaluate engineering geological conditions. Marine engineering exploration technology is a technology that ensures safety and controls risks, minimizing the risks of offshore oil and gas exploration, drilling, and subsequent development.

[0003] In order to complete tasks such as marine engineering geological exploration and drilling geological research, marine engineering geological exploration vessels need to have engineering geological drilling functions, be able to meet the operating depth in a certain marine environment, have a certain drilling depth operation capability, and achieve the purpose and requirements of drilling and coring. At present, marine engineering geological exploration vessels mostly use single-mast derricks, and there are also exploration vessels in the form of catamarans, but they are all fixed derricks, with limited drilling range, and the fixed derrick causes the overall center of gravity of the hull to increase, and the ability to resist wind and waves is poor. Summary of the Invention

[0004] (1) Technical issues to be resolved

[0005] In order to solve the above problems in the prior art, the present invention provides a telescopic double-masted derrick for marine engineering survey, which solves the problems of limited drilling mechanism travel and poor wind and wave resistance.

[0006] (2) Technical solution

[0007] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] A telescopic double-masted derrick for marine engineering survey, comprising a frame body, a top platform frame, and a crossbeam frame;

[0009] There are two frames, each of which includes an outer bottom frame and an inner upper frame;

[0010] The horizontal cross-sections of the outer bottom frame and the inner upper frame are both C-shaped;

[0011] The inner upper frame is composed of multiple standard sections connected by connectors;

[0012] The inner upper frame is installed inside the outer bottom frame, and the inner upper frame can be raised or lowered inside the outer bottom frame;

[0013] The outer chassis is equipped with a lifting mechanism and a hydraulic locking mechanism;

[0014] The lifting mechanism is used to lift or lower the inner upper frame, the hydraulic locking mechanism is used to support the inner upper frame, the top of the outer bottom frame is provided with an adjusting pulley assembly, and the bottom of the outer bottom frame is provided with a base connected to the hull;

[0015] The inner upper frame is provided with a pulley assembly, which can move up and down in the inner upper frame;

[0016] The tops of the inner upper frames of the two frames are connected to the top platform frame, and the two outer bottom frames and the two inner upper frames are connected by a crossbeam frame to form the entire derrick.

[0017] The telescopic double-masted derrick for marine engineering survey of the present invention is equipped with a telescopic double-masted derrick and uses a lifting mechanism, a hydraulic locking mechanism, etc. to realize the lifting and lowering of the derrick. The derrick can be retracted when the drilling ship is sailing, and can be raised when working, so as to meet the low-position load during sailing and ensure safety. When working, the rod can be lifted at a high position and a long stroke can be fed, which meets the stability requirements of small and medium-sized drilling ships.

[0018] Preferably, the lifting mechanism includes a lifting cylinder, a transverse plate, and a lifting rail;

[0019] The lifting cylinder is fixedly installed inside the frame on the opposite side of the C-shaped opening of the outer frame. The cross plate is a rectangular parallelepiped and is installed on the top of the lifting cylinder. The lifting cylinder is fixedly connected to the middle part of the cross plate. Connecting screws are fixedly installed at both ends of the cross plate for connecting the steel cable.

[0020] A lifting rail is provided on both sides of the lifting oil cylinder. A first through hole is provided at the inner position of the connecting screw rods at both ends of the horizontal plate. The horizontal plate is sleeved on the outer surface of the lifting rail through the two first through holes.

[0021] The lifting cylinder arranged on the outer base frame drives the cross plate to move upward along the lifting rail. The connecting screws on both sides of the cross plate are connected to the bottom of the inner upper frame through steel cables, driving the inner upper frame to move upward along the outer base frame to complete the lifting of the inner upper frame. The structure is stable and reliable.

[0022] Preferably, the hydraulic locking mechanism includes a locking cylinder, a connecting rod, and a support member;

[0023] There are two sets of hydraulic locking mechanisms, which are respectively set at the upper and lower limit positions of the inner upper frame inside the outer bottom frame;

[0024] Each set of hydraulic locking structures consists of two, which are respectively set on the frame body on both sides of the C-shaped opening of the outer chassis. The hydraulic cylinder is fixedly connected to the outer chassis, and the connecting rod is an inverted T-shaped, and the upper end of the connecting rod is connected to the cylinder rod body of the hydraulic cylinder;

[0025] There are two L-shaped support members, one end of each of the two support members is set in the first slot on the outside of the outer frame, and the other two free ends of the connecting rod pass through the first slot and are fixedly connected to the two support members;

[0026] When the oil cylinder rod of the locking oil cylinder is extended, the two supporting members can rotate under the drive of the connecting rod.

[0027] When the inner upper frame rises along the outer base frame, the locking cylinder can be opened first to drive the support to rotate to the outside of the outer base frame. When the inner upper frame rises to the specified position, the locking cylinder is retracted, driving the support to rotate back to its original position, and then the inner upper frame is dropped on the support to form a support. The structure is simple and the force is transmitted to the entire frame to ensure safety.

[0028] Preferably, limit plates are fixedly provided at the four corners of the top end of the outer chassis;

[0029] The adjusting pulley assembly includes an adjusting screw and an adjusting pulley;

[0030] A threaded hole is opened in the middle of the limit plate, and the adjusting screw passes through the limit plate and is movably connected to the adjusting pulley, and the adjusting screw is fixed by the adjusting nut;

[0031] The adjusting pulley can rotate around the adjusting screw, and the adjusting screw can adjust its own position by changing the position of the adjusting nut, thereby changing the position of the adjusting pulley.

[0032] The adjustable pulley with reversible position provides stable support for the inner upper shelf, preventing the inner upper shelf from shifting and posing a safety hazard.

[0033] Preferably, the outer chassis is further provided with a first external pulley assembly, a lifting limit device, and a manual locking mechanism;

[0034] There are two lifting limit devices, which are installed on the outer bottom frame on both sides of the lifting mechanism. The outer side of the inner upper frame is provided with a limit block to cooperate with the lifting limit device;

[0035] The manual locking mechanism includes a second slot and a limit rod provided at the upper limit position of the outer chassis. One end of the limit rod is movably connected to the second slot and can rotate around the connection. The other end of the limit rod is provided with a thread and is sleeved with a limit nut.

[0036] The manual locking mechanism is used in conjunction with a third card slot provided at a corresponding position on the inner upper rack.

[0037] When the drilling vessel is working, in order to prevent the inner upper frame from shaking upward under the influence of waves, a manual locking mechanism is used in conjunction with a hydraulic locking mechanism to completely fix the inner upper frame.

[0038] Preferably, two outer guide rails and two inner guide rails are further provided inside the inner upper rack.

[0039] The outer guide rail and inner guide rail inside the inner upper frame are used in conjunction with the upper guide wheel assembly and the lower guide wheel assembly of the pulley assembly to realize the up and down movement of the pulley assembly inside the inner upper frame.

[0040] Preferably, the inner upper frame has four standard sections, and adjacent standard sections are connected by connecting pieces;

[0041] The connecting member includes a connecting plate, a first screw rod, and a first nut;

[0042] There are two connecting plates, both of which have a number of through holes on their surfaces;

[0043] A crossbeam is provided at the bottom of the inner upper frame, a connecting support is provided on the crossbeam, and a plurality of reinforcing rods are evenly provided inside the inner upper frame.

[0044] A pulley assembly that can move up and down is set inside the inner upper shelf, and a reinforcement rod is added to ensure the stability of the inner upper shelf.

[0045] Preferably, the lower parts of both sides of the top stand are connected to the inner upper frame through connecting pieces;

[0046] A CPT pulley assembly is provided on the upper part of the top platform, and a second external pulley assembly is provided on the lower part.

[0047] Preferably, both ends of the crossbeam are provided with ear plates;

[0048] There is a threaded hole in the middle of the ear plate, and the crossbeam frame is connected to the outer bottom frame and the inner upper frame through the threaded hole of the ear plate;

[0049] Ribs are provided on the upper and lower surfaces of the ear plate.

[0050] Preferably, when the inner upper frame moves upward to the upper limit position in the outer bottom frame, the bottom frame body of the inner upper frame and the upper frame body of the outer bottom frame have an overlapping section.

[0051] When in working state, the outer bottom frame and the inner upper frame have an overlapping section, which can ensure the stability of the whole prosthesis.

[0052] (3) Beneficial effects

[0053] The beneficial effects of the present invention are:

[0054] The telescopic double-masted derrick for marine engineering survey of the present invention realizes the extension and retraction of the derrick by setting a telescopic derrick and using a lifting mechanism in conjunction with a hydraulic locking structure. A pulley assembly that can move up and down is set in the inner upper frame. When the drilling ship is in working condition, the inner upper frame rises to a high position to meet the working requirements of long-stroke drilling, high-speed drilling and the like. When in navigation condition, the inner upper frame and the pulley assembly can be retracted to make the overall center of gravity of the derrick at a low position, the oil cylinder is stable, and the load is carried at a low position, thereby ensuring the requirements of wind and wave resistance during navigation, ensuring the navigation safety of the drilling ship, and meeting the requirements of stability of small and medium-sized exploration ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 This is a front view of the telescopic double-masted derrick of the present invention;

[0056] Figure 2This is a left side view of the telescopic double-masted derrick of the present invention;

[0057] Figure 3 It is a right side view of the outer chassis of the present invention;

[0058] Figure 4 This is a front view of the outer chassis of the present invention;

[0059] Figure 5 A perspective view of the outer chassis of the present invention;

[0060] Figure 6 for Figure 3 An enlarged schematic diagram of Figure 11;

[0061] Figure 7 for Figure 3 An enlarged schematic diagram of Figure 12;

[0062] Figure 8 This is a three-dimensional diagram of the inner upper frame of the present invention;

[0063] Figure 9 It is a three-dimensional diagram of the pulley assembly of the present invention;

[0064] Figure 10 a is a front view of the pulley assembly of the present invention;

[0065] Figure 10 b is a right side view of the pulley assembly of the present invention;

[0066] Figure 11 This is a schematic diagram of the pulley assembly of the present invention installed inside the inner upper frame;

[0067] Figure 12 Schematic diagram of the installation of the steel cable between the pulley assembly and the heave compensation frame of the present invention;

[0068] Figure 13 A perspective view of the top frame platform of the present invention;

[0069] Figure 14 It is a three-dimensional diagram of the crossbeam frame of the present invention;

[0070] Figure 15 It is a schematic cross-sectional view of the manual locking mechanism of the present invention.

[0071] [Description of Reference Numerals]

[0072] 1: outer chassis;

[0073] 11: lifting mechanism;

[0074] 1101: Lifting cylinder; 1102: Horizontal plate; 1103: Lifting rail;

[0075] 12: Hydraulic locking mechanism;

[0076] 1201: Locking cylinder; 1202: Connecting rod; 1203: Support member;

[0077] 13: Adjusting pulley assembly;

[0078] 1301: Adjusting screw; 1302: Adjusting pulley;

[0079] 14: First external pulley assembly; 15: Lifting limit device;

[0080] 16: Manual locking mechanism;

[0081] 1601: second slot; 1602: limit rod; 1603: third slot;

[0082] 17: base;

[0083] 2: Internal shelf;

[0084] 21: Connecting piece; 22: Connecting support; 23: Reinforcement rod;

[0085] 3: Top rack;

[0086] 31: CPT pulley assembly; 32: Second external pulley assembly;

[0087] 4: beam frame;

[0088] 41: Ear plate; 42: Screw hole; 43: Rib plate;

[0089] 5: Pulley assembly;

[0090] 51: Oil cylinder; 52: Upper guide wheel assembly; 53: Lower guide wheel assembly; 54: Base; 55: Pressure rope fixed end; 56: Lifting rope fixed end; 57: Outer guide rail; 58: Inner guide rail;

[0091] 6: Steel cable; 61: Pressure rope; 62: Pulling rope;

[0092] 7: Heave compensation frame;

[0093] 71: pressure reducing wheel; 72: pressure increasing wheel. DETAILED DESCRIPTION

[0094] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0095] Example:

[0096] like Figure 1 、 Figure 2 、 Figure 3As shown, a telescopic double-masted derrick for marine engineering survey includes a frame body, a top frame 3, and a crossbeam frame 4. There are two frames, each of which includes an outer bottom frame 1 and an inner upper frame 2. The horizontal cross-sections of the outer bottom frame 1 and the inner upper frame 2 are both C-shaped. The inner upper frame 2 is composed of multiple standard sections connected by connectors 21. The inner upper frame 2 is sleeved in the outer bottom frame 1 and can be lifted or lowered in the outer bottom frame 1. The outer bottom frame 1 is provided with a lifting mechanism 11 and a hydraulic locking mechanism 12. The lifting mechanism The structure 11 is used to lift or lower the inner upper frame 2, the hydraulic locking mechanism 12 is used to support the inner upper frame 2, the top of the outer bottom frame 1 is provided with an adjusting pulley assembly 13, the bottom of the outer bottom frame 1 is provided with a base 17 connected to the hull, and the inner upper frame 2 is provided with a pulley assembly 5, which can move up and down in the inner upper frame 2. The tops of the inner upper frames 2 of the two frames are connected to the top platform 3, and the two outer bottom frames 1 and the two inner upper frames 2 are connected by a crossbeam frame 4 to form the entire derrick.

[0097] like Figure 6 As shown, the lifting mechanism 11 includes a lifting cylinder 1101, a cross plate 1102, and a lifting rail 1103. The lifting cylinder 1101 is fixedly arranged inside the frame on the opposite side of the C-shaped opening of the outer base frame 1. The cross plate 1102 is a rectangular parallelepiped and is arranged on the top of the lifting cylinder 1101. The lifting cylinder 1101 is fixedly connected to the middle part of the cross plate 1102. Both ends of the cross plate 1102 are fixedly provided with connecting screws for connecting the steel cable. A shackle is provided at the bottom of the inner upper frame 2 for cooperating with the connecting screw to connect the other end of the steel cable. A lifting rail 1103 is provided on both sides of the lifting cylinder 1101. A first through hole is opened at the inner position of the connecting screws at both ends of the cross plate 1102, and the cross plate 1102 is sleeved on the outer surface of the lifting rail 1103 through the two first through holes.

[0098] When the lifting cylinder 1101 is working, the cross plate 1102 moves upward along the lifting rail 1103, and the steel cable connected to the screw pulls the shackle at the bottom of the inner upper frame 2 to drive the inner upper frame 2 to move upward.

[0099] like Figure 7As shown, the hydraulic locking mechanism 12 includes a locking cylinder 1201, a connecting rod 1202, and a support 1203. There are two groups of hydraulic locking mechanisms 12, which are respectively arranged at the upper and lower limit positions of the inner upper frame 2 inside the outer base frame 1. Each group of hydraulic locking structures 12 consists of two, which are respectively arranged on the frame bodies on both sides of the C-shaped opening of the outer base frame 1. The hydraulic cylinder 1201 is fixedly connected to the outer base frame 1, and the connecting rod 1202 is an inverted T-shape. The upper end of the connecting rod 1202 is connected to the cylinder rod body of the hydraulic cylinder 1201. There are two support members 1203, which are L-shaped. One end of the two support frames 1203 is arranged in the first card groove on the outside of the outer frame body 1, and the other two free ends of the connecting rod 1202 pass through the first card groove and are fixedly connected to the two support members 1203. When the cylinder rod body of the locking cylinder 1201 is extended, the two support members 1203 can rotate under the drive of the connecting rod 1202.

[0100] Before the lifting cylinder 1101 drives the inner upper frame 2 and the outer base frame 1 to move upward, the locking cylinder 1201 is in an outward pushed state. At this time, the support member 1203 is located on the outside of the frame of the outer base frame 1. When the lifting cylinder 1101 drives the inner upper frame 2 to move upward to a certain position, the locking cylinder 1201 retracts, driving the support member 1203 to rotate back to its original position. The lifting cylinder 1101 falls and places the inner upper frame 2 on the support member 1203. At this time, the cylinder rod of the lifting cylinder 1101 can be recovered to prevent the rod from being damaged by being extended for a long time.

[0101] like Figure 5 As shown, the four corners of the top of the outer base frame 1 are fixedly provided with limit plates, and the adjusting pulley assembly 13 includes an adjusting screw 1301 and an adjusting pulley 1302. A threaded hole is opened in the middle of the limit plate, and the adjusting screw 1301 passes through the limit plate and is movably connected to the adjusting pulley 1302, and the adjusting screw 1301 is fixed by an adjusting nut. The adjusting pulley 1302 can rotate around the adjusting screw 1301. The adjusting screw 1301 can adjust its own position by changing the position of the adjusting nut, thereby changing the position of the adjusting pulley 1302.

[0102] The inner upper frame 2 is arranged inside the outer base frame 1 and can move upward along the outer base frame 1 through the lifting mechanism 11. The moving direction of the inner upper frame 2 is regulated by the four adjusting pulley assemblies 13 arranged on the upper part of the outer base frame 1. The position of the adjusting pulley 1302 can be changed by adjusting the screw 1301 to keep the verticality of the inner upper frame 2 at all times and ensure the safety of the derrick.

[0103] like Figure 3 、 Figure 4 、 Figure 6 、 Figure 15As shown, the outer base frame 1 is also provided with a first external pulley assembly 14, a lifting limit device 15, and a manual locking mechanism 16. There are two lifting limit devices 15, which are arranged on the outer base frame 1 on both sides of the lifting mechanism 11. A limit block is provided on the outside of the inner upper frame 2 for use in conjunction with the lifting limit device 15. The manual locking mechanism 16 includes a second card slot 1601 and a limit rod 1602 provided at the upper limit of the outer base frame 1. One end of the limit rod 1602 is movably connected to the second card slot 1601 and can rotate around the connection. The other end of the limit rod 1602 is provided with a thread and is sleeved with a limit nut. The manual locking mechanism 16 is used in conjunction with a third card slot 1603 provided at the corresponding position of the inner upper frame 2.

[0104] The lifting limit device 15 provided on the outside of the outer base frame 1 is used in conjunction with the limit block on the outside of the inner upper frame 2. A pair of limit blocks is provided at every 1.5m interval. Every time the inner upper frame 2 is lifted by 1.5m, the lifting limit device 15 is used to block the inner upper frame 2 first, check the vertical state of the inner upper frame 2, and adjust it by adjusting the pulley assembly 13. Excessive lifting at one time may easily cause safety hazards.

[0105] When the inner upper frame 2 is lifted, the support member 1203 of the hydraulic locking mechanism 12 supports the inner upper frame. Theoretically, there is no effect of the lifting cylinder 1101, and the inner upper frame 2 will not move upward. In order to prevent the inner upper frame 2 from shaking due to the influence of waves during work, the lower part of the inner upper frame 2 is tightened by the manual locking mechanism 16 to prevent the inner upper frame 2 from shaking.

[0106] like Figure 8 As shown, the inner upper frame 2 has four standard sections, and adjacent standard sections are connected by connecting members 21. The connecting member 21 includes a connecting plate, a first screw, and a first nut. There are two connecting plates, and a plurality of second through holes are opened on the surface. A cross beam is provided at the bottom of the inner upper frame 2, and a connecting support 22 is provided on the cross beam. A plurality of reinforcing rods 23 are evenly arranged inside the inner upper frame 2.

[0107] Two outer guide rails 57 and two inner guide rails 58 are further provided inside the inner upper frame 2 .

[0108] Each standard section of the inner upper frame 2 is connected by a connecting piece 21. The connecting piece 21 includes two connecting plates and a plurality of matching first screws and first nuts. Both ends of the two adjacent standard sections are provided with a third through hole corresponding to the second through hole on the surface of the connecting plate. During installation, the two connecting plates are placed on both sides of the connection of the standard sections, with the second through hole corresponding to the third through hole. The first screw is used to cooperate with the first nut to tighten to complete the installation.

[0109] like Figure 9 、 Figure 10 a. Figure 10As shown in FIG. 2 , the pulley assembly 5 includes an oil cylinder 51, a pulley assembly provided at the top of the pulley assembly 5, the pulley assembly including a cable wheel and two pulleys provided on both sides of the cable wheel, two pressure wheels provided at the bottom of the pulley assembly 5, an upper guide wheel assembly 52 provided on both sides of the upper part of the pulley assembly 5, and a lower guide wheel assembly 53 provided on both sides of the lower part of the pulley assembly 5. A support 54 is provided at the bottom of the oil cylinder 51.

[0110] like Figure 11 As shown, the pulley assembly 5 is installed inside the inner upper frame 2, and the base 54 of the cylinder 51 is connected to the connecting support 22 of the inner upper frame 2 to increase the force-bearing area and prevent the local pressure from being too high when the cylinder 51 is working, thereby preventing the frame from being damaged. The upper guide wheel assembly 52 of the pulley assembly 5 is used in conjunction with the outer guide rail 57 inside the inner upper frame 2, and the lower guide wheel assembly 53 is used in conjunction with the inner guide rail 58 inside the inner upper frame 2, which can ensure that the pulley assembly 5 moves upward along the inner upper frame 2 under the action of the cylinder 1.

[0111] like Figure 12 As shown, the pulley assembly 5 and the heave compensation frame 7 are hoisted together by steel wire ropes. There are two pressure ropes 61. One end of the pressure rope 61 is connected to a pressure rope fixed end 55. The pressure rope fixed end 55 is fixedly connected to the inner upper frame 2. The pressure rope 61 passes over the pressure wheel on the same side as the pressure rope fixed end 55 at the bottom end of the pulley assembly 5, passes over the pressure wheel 72 of the heave compensation frame 7, then passes back to the other pressure wheel at the bottom end of the pulley assembly 5, and finally returns to the other pressure rope fixed end 55.

[0112] There are two pulling ropes 62, one end of the pulling rope 62 is connected to a pulling rope fixed end 56, and the pulling rope fixed end 56 is fixedly connected to the inner upper frame 2. The pulling rope 62 passes around the pulling wheel on the same side as the pulling rope fixed end 56 at the top of the pulley assembly 5, passes around the pressure reducing wheel 71 of the heave compensation frame 7, then goes back to the other pulling wheel at the top of the pulley assembly 5, and finally returns to the other pulling rope fixed end 56.

[0113] The two pulley assemblies 5 are connected to the heave compensation frame 7 in the above-mentioned manner, thus completing the hoisting work of the heave compensation frame 7 .

[0114] like Figure 13 As shown, the lower parts of both sides of the top platform 3 are connected to the inner upper frame 2 through connecting parts 21, and a CPT pulley assembly 31 is provided on the upper part of the top platform 3, and a second external pulley assembly 32 is provided on the lower part.

[0115] like Figure 14 As shown, both ends of the crossbeam frame 4 are provided with ear plates 41, and a threaded hole is opened in the middle of the ear plate 41. The crossbeam frame 4 is connected to the outer bottom frame 1 and the inner upper frame 2 through the threaded holes of the ear plates 41. Ribs 43 are provided on the upper and lower surfaces of the ear plates 41.

[0116] The crossbeam frame 4 strengthens the structural safety of the whole derrick, and increases the structural strength of the connection by arranging ribs 43 on the ear plates 41 to ensure structural stability.

[0117] In the marine engineering survey telescopic double-masted derrick of the present invention, when the inner upper frame 1 moves upward to the upper limit position within the outer bottom frame 1, the bottom frame of the inner upper frame 2 and the upper frame of the outer bottom frame 1 have an overlapping section. This design method can make the derrick as a whole more stable and safe when it is in the high position in the working state.

[0118] The telescopic double-masted derrick for marine engineering survey of the present invention can lift or lower the inner upper frame 2 along the outer base frame 1 through the lifting mechanism 11. The hydraulic locking mechanism 12 and the manual locking mechanism 16 cooperate to ensure that when the inner upper frame 2 is at the upper limit of the outer base frame 1, it will not shake due to waves, etc., thereby ensuring the stability of the derrick as a whole. When in working state, the inner upper frame 2 is in a high position, and the pulley assembly 5 rises to the top along the inner upper frame 2. The door-type double-cylinder wire rope speed mechanism inside the inner upper frame 2 has both pressurization and decompression functions.

[0119] The heave compensation frame 7 moves upward under the drive of the two pulley assemblies 5, and the rising speed of the heave compensation frame 7 is twice the working speed of the oil cylinder 51, which can quickly lift the heave compensation frame 7 to the working height;

[0120] The high-position CPT pulley assembly 31 of the top platform 3 ensures the deployment of extra-long CPT tools (12.5m), and the main carrying double mast structure has a height limit;

[0121] When the drilling ship is in a sailing state, the pulley assembly 5 is located at the lower part of the inner upper frame 2, and the oil cylinder 51 is also arranged at the lower part of the inner upper frame 2. The entire inner upper frame 2 is located at the lower limit position of the outer bottom frame 1 under the action of the lifting mechanism 11. At this time, the center of gravity of the entire derrick is lowered, which can meet the low-level load-bearing requirements of the drilling ship during navigation, ensure navigation safety, and meet the stability requirements of small and medium-sized exploration ships.

[0122] As described above, the present invention can be implemented better.

[0123] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that several improvements and modifications may be made to these embodiments without departing from the principles and spirit of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A telescopic double-masted derrick for marine engineering survey, characterized in that: It includes a frame, a top frame (3), and a crossbeam frame (4); There are two frames, each frame comprising an outer bottom frame (1) and an inner upper frame (2); The horizontal cross-sections of the outer bottom frame (1) and the inner upper frame (2) are both C-shaped; The inner upper frame (2) is composed of a plurality of standard sections connected by connecting pieces (21); The inner upper frame (2) is sleeved inside the outer bottom frame (1), and the inner upper frame (2) can be raised or lowered inside the outer bottom frame (1); The outer chassis (1) is provided with a lifting mechanism (11) and a hydraulic locking mechanism (12); The lifting mechanism (11) is used to lift or lower the inner upper frame (2), the hydraulic locking mechanism (12) is used to support the inner upper frame (2), the top of the outer bottom frame (1) is provided with an adjusting pulley assembly (13), and the bottom of the outer bottom frame (1) is provided with a base (17) connected to the hull; A pulley assembly (5) is provided in each of the inner upper frames (2), and the pulley assembly (5) can move up and down in the inner upper frame (2); The tops of the inner upper frames (2) of the two frames are connected to the top platform frame (3), and the two outer bottom frames (1) and the two inner upper frames (2) are connected by a crossbeam frame (4) to form the entire derrick; The lifting mechanism (11) comprises a lifting cylinder (1101), a transverse plate (1102), and a lifting rail (1103); The lifting cylinder (1101) is fixedly arranged inside the frame body on the opposite side of the C-shaped opening of the outer base frame (1). The horizontal plate (1102) is a rectangular parallelepiped and is arranged on the top of the lifting cylinder (1101). The lifting cylinder (1101) is fixedly connected to the middle part of the horizontal plate (1102). Both ends of the horizontal plate (1102) are fixedly provided with connecting screws for connecting the steel cable. A lifting rail (1103) is provided on both sides of the lifting oil cylinder (1101), a first through hole is provided at the inner position of the connecting screw at both ends of the horizontal plate (1102), and the horizontal plate (1102) is sleeved on the outer surface of the lifting rail (1103) through the two first through holes; The hydraulic locking mechanism (12) comprises a locking oil cylinder (1201), a connecting rod (1202), and a support member (1203); There are two sets of hydraulic locking mechanisms (12), which are respectively arranged at the upper and lower limit positions of the inner upper frame (2) inside the outer bottom frame (1); Each set of hydraulic locking structures (12) is two in number and is respectively arranged on the frame body on both sides of the C-shaped opening of the outer base frame (1); the locking oil cylinder (1201) is fixedly connected to the outer base frame (1); the connecting rod (1202) is in an inverted T shape; the upper end of the connecting rod (1202) is connected to the cylinder rod body of the locking oil cylinder (1201); There are two L-shaped support members (1203), one end of each of the two support members (1203) is disposed in a first slot on the outside of the outer chassis (1), and the other two free ends of the connecting rod (1202) pass through the first slot and are fixedly connected to the two support members (1203); When the oil cylinder rod of the locking oil cylinder (1201) is extended, the two supporting members (1203) can be rotated under the drive of the connecting rod (1202).

2. The telescopic double-masted derrick according to claim 1, characterized in that: Limiting plates are fixedly provided at the four corners of the top of the outer chassis (1); The adjusting pulley assembly (13) includes an adjusting screw (1301) and an adjusting pulley (1302); A threaded hole is opened in the middle of the limit plate, and the adjusting screw (1301) passes through the limit plate and is movably connected to the adjusting pulley (1302), and the adjusting screw (1301) is fixed by an adjusting nut; The adjusting pulley (1302) can rotate around the adjusting screw (1301), and the adjusting screw (1301) can adjust its own position by changing the position of the adjusting nut, thereby changing the position of the adjusting pulley (1302).

3. The telescopic double-masted derrick according to claim 1, characterized in that: The outer chassis (1) is further provided with a first external pulley assembly (14), a lifting limit device (15), and a manual locking mechanism (16); There are two lifting limit devices (15), which are arranged on the outer bottom frame (1) on both sides of the lifting mechanism (11), and a limit block is arranged on the outer side of the inner upper frame (2) for use in conjunction with the lifting limit device (15); The manual locking mechanism (16) comprises a second slot (1601) and a limiting rod (1602) provided at the upper limit position of the outer chassis (1); one end of the limiting rod (1602) is movably connected to the second slot (1601) and can rotate around the connection; the other end of the limiting rod (1602) is provided with a thread and is sleeved with a limiting nut; The manual locking mechanism (16) is used in conjunction with a third locking slot (1603) provided at a corresponding position of the inner upper frame (2).

4. The telescopic double-masted derrick according to claim 1, characterized in that: The inner upper frame (2) has four standard sections, and adjacent standard sections are connected by connecting pieces (21); The connecting member (21) comprises a connecting plate, a first screw rod, and a first nut; There are two connecting plates, each of which has a plurality of second through holes on its surface; A crossbeam is provided at the bottom of the inner upper frame (2), a connecting support (22) is provided on the crossbeam, and a plurality of reinforcing rods (23) are evenly provided inside the inner upper frame (2).

5. The telescopic double-masted derrick according to claim 1, characterized in that: Two outer guide rails (57) and two inner guide rails (58) are also provided inside the inner upper frame (2).

6. The telescopic double-masted derrick according to claim 4, characterized in that: The lower parts of both sides of the top frame (3) are connected to the inner upper frame (2) through connecting pieces (21); A CPT pulley assembly (31) is provided on the upper portion of the top platform (3), and a second external pulley assembly (32) is provided on the lower portion.

7. The telescopic double-masted derrick according to claim 1, characterized in that: Both ends of the crossbeam frame (4) are provided with ear plates (41); A threaded hole is formed in the middle of the ear plate (41), and the crossbeam frame (4) is connected to the outer bottom frame (1) and the inner upper frame (2) through the threaded hole of the ear plate (41); Ribs (43) are provided on the upper and lower surfaces of the ear plate (41).

8. The telescopic double-masted derrick according to claim 1, characterized in that: When the inner upper frame (2) moves upward to the upper limit position in the outer bottom frame (1), the bottom frame body of the inner upper frame (2) and the upper frame body of the outer bottom frame (1) have an overlapping section.

Images