A locking device for a leg-elevating platform

Abstract

The present invention discloses a locking device for a leg jack-up platform, which relates to the technical field of jack-up offshore engineering platform equipment. The present invention includes a cavity (20), an upper wedge groove (21), an upper wedge block (22), a locking tooth block (23), a lower wedge block (24), a lower wedge groove (25), an upper positioning rod (26), a tooth block positioning rod (27), and a lower positioning rod (28). The upper wedge groove (21) is fixed to the top of the cavity (20), the lower wedge groove (25) is fixed to the bottom of the cavity (20), the upper positioning rod (26), the tooth block positioning rod (27), and the lower positioning rod (28) are sequentially installed in the cavity (20), the axes of the upper positioning rod (26), the tooth block positioning rod (27), and the lower positioning rod (28) are parallel to each other in pairs, and the locking tooth block (23) is installed in the cavity (20) through the tooth block positioning rod (27), having the advantages of simple structure, saving platform space, and improving the safety and stability of equipment operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of lifting marine engineering platform equipment, and particularly relates to a locking device for a leg-lifting platform. Background Art

[0002] A lifting platform is a mobile marine engineering platform used for offshore energy exploitation and exploration. This platform can reach a predetermined location for work by being towed by a barge or by self-navigation. The main components of a lifting platform are a working platform, legs supporting the platform, a power device for controlling the lifting of the working platform, and a locking device for positioning the working platform after it is in place. After adjusting the relative positions of the working platform and the legs, the locking device can be activated to lock the platform, and the locking device realizes the positioning and support of the platform.

[0003] According to the disclosed content of the patent with the patent number US005915882A, the existing locking device for a lifting platform generally includes main functional parts such as a locking tooth block that is mutually engaged with the rack on the leg to achieve locking, a translation element for pushing or driving the locking tooth block to engage or disengage with the rack on the leg, a lifting element for pushing the locking tooth block to move up and down, and a support element for supporting the locking tooth block during locking. When performing the locking operation, first start the lifting element to make the teeth on the locking tooth block stagger relative to the teeth on the leg rack, that is, make the tooth tip of the locking tooth block opposite to the tooth groove of the lifting rack, then start the translation element to push or drive the locking tooth block to fully engage with the leg rack, and finally use the support element to fixedly support the locking tooth block, thereby realizing the relative locking between the platform and the leg.

[0004] The existing locking device generally does not have a separate support element, but uses the translation element and the lifting element directly as the support element. After the locking tooth block moves into place, the translation element and the lifting element are directly used to fixedly support the locking tooth block. In the locked state, the locking tooth block needs to almost transfer and bear all the mutual acting forces between the platform and the leg in the vertical direction. Such forces are very large in general. This requires that the translation element and the lifting element that also act as support elements need to be designed to be large-sized. The existing locking device generally operates in an automated manner, and generally uses electric or hydraulic screw rods or cylinders to move and support the translation element and the lifting element. This will make the screw rods or cylinders and the motors or hydraulic stations for driving them also need to be designed to be relatively large-sized. These large-sized screw rods or cylinders and motors or hydraulic stations will make the design of the platform more complex and bulky.

[0005] The problems existing in the prior art are as follows:

[0006] 1. The overall structure of the locking device is complex, and the equipment cost is huge.

[0007] 2. The driving components such as motors or hydraulic stations are too large, occupying a large area of the platform.

[0008] 3. The locking and pressure-bearing are both the same component, with low safety and stability.

[0009] 4. The structure of the vulnerable components is complex, and the later maintenance cost is high. Summary of the Invention

[0010] The purpose of the present invention is to provide a locking device for a leg lifting platform in view of the problems of the complex structure of the locking device of the existing lifting platform, high design cost and high maintenance cost.

[0011] The technical solution adopted by the present invention is as follows:

[0012] A locking device for a leg lifting platform includes a cavity, an upper wedge groove, an upper wedge block, a locking tooth block, a lower wedge block, a lower wedge groove, an upper positioning rod, a tooth block positioning rod and a lower positioning rod. The upper wedge groove is fixed on the top of the cavity, the lower wedge groove is fixed on the bottom of the cavity, the upper positioning rod, the tooth block positioning rod and the lower positioning rod are sequentially installed in the cavity, the axes of the upper positioning rod, the tooth block positioning rod and the lower positioning rod are parallel to each other in pairs, and the locking tooth block is installed in the cavity through the tooth block positioning rod.

[0013] Preferably, the cavity is a semi-open structure, and the cavity includes a top mounting surface, a side limiting surface, a rear limiting surface, a bottom mounting surface and an outer side plate. Threaded holes are provided on the outer side plate, and the positions and numbers of the threaded holes correspond to those of the upper positioning rod, the tooth block positioning rod and the lower positioning rod.

[0014] The upper wedge groove is fixed on the top mounting surface of the cavity, the lower wedge groove is fixed on the bottom mounting surface of the cavity, and the upper positioning rod, the tooth block positioning rod and the lower positioning rod are respectively connected to the upper wedge block, the locking tooth block and the lower wedge block through the threaded holes.

[0015] An inclined groove is provided at the lower part of the upper wedge groove, and the slope of the bottom surface of the inclined groove relative to the horizontal plane is the same as the slope of the top inclined surface of the wedge block. The two inner side surfaces of the inclined groove respectively match the two side surfaces of the upper wedge block, and the upper wedge block can be inserted into the inclined groove.

[0016] Preferably, the top and bottom of the upper wedge block are respectively the wedge block top inclined surface and the bottom inclined surface, the inclined directions of the wedge block top inclined surface and the bottom inclined surface are opposite, the height of the side of the upper wedge block connected to the upper positioning rod is higher than the other end, and a first T-shaped groove is provided on the side of the upper wedge block connected to the upper positioning rod.

[0017] Preferably, both side surfaces of the upper wedge block are flat and parallel to the axis of the upper positioning rod. The two side surfaces of the upper wedge block match the two inner side surfaces of the inclined slot, and the upper wedge block can be inserted into the inclined slot. Both side surfaces of the lower wedge block are flat and parallel to the axis of the lower positioning rod 28. The lower wedge block can be inserted into the cavity, and a third T-shaped slot is provided at the upper end of the lower wedge block.

[0018] Preferably, the top of the locking tooth block is a top inclined surface, and the slope of the top inclined surface relative to the horizontal plane is the same as that of the bottom inclined surface of the upper wedge block. The bottom of the locking tooth block is a bottom flat surface, and the bottom flat surface is parallel to the axis of the tooth block positioning rod.

[0019] Preferably, a second T-shaped slot is provided on the end surface of the locking tooth block connected to the tooth block positioning rod. A hole for installation is provided in the middle of the second T-shaped slot. Steps are respectively provided on the top inclined surface and the bottom flat surface, and the protruding surfaces of the steps are all parallel to the axis of the tooth block positioning rod.

[0020] Preferably, limiting plates are provided both above and below the end of the locking tooth block far from the tooth block positioning rod. One side of the locking tooth block close to the tooth block positioning rod is a limiting flat surface, and the limiting flat surface fits with the rear limiting surface of the cavity.

[0021] Preferably, the top of the lower wedge block is a top flat surface, and the top flat surface is parallel and fits with the bottom flat surface of the locking tooth block. The height of one end of the lower wedge block connected to the lower positioning rod is higher than that of the other end, and a third T-shaped slot is provided on the connecting end; a second curved surface matching the bottom installation surface is provided at the bottom of the lower wedge slot, and the second curved surface contacts the bottom installation surface.

[0022] Preferably, the number of the tooth block positioning rods ≥ 1. The tooth block positioning rod includes a tooth block rod main body, a driving block, and a second rotating body. The middle part of the tooth block rod main body is a threaded surface, and the thread on the threaded surface matches the bolt hole in the middle of the threaded hole to form a thread pair. The tooth block rod main body is installed on the outer side plate through the bolt hole in the middle of the threaded hole, and a second shoulder is provided at one end of the driving block.

[0023] Preferably, the upper positioning rod includes an upper rod main body and a first rotating body. The upper rod main body is installed on the outer side plate through a threaded hole. One end of the upper rod main body is inside the cavity, and the other end of the upper rod main body is outside the cavity. A first shoulder is provided at the end of the upper rod main body inside the cavity. The shape and size of the first shoulder respectively match the first T-shaped slot and the third T-shaped slot. The first shoulder is inserted and assembled into the first T-shaped slot and the third T-shaped slot through the upper and lower ends of the first T-shaped slot and the third T-shaped slot. The structure of the lower positioning rod is the same as that of the upper positioning rod.

[0024] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0025] 1. Aiming at the problems of the complex structure of the locking device of the existing lifting platform, high design cost and high maintenance cost. The solution of the present invention has been redesigned in all aspects. In this solution, most of the forces and torques received by the locking device during the locking state do not need to pass through the upper positioning rod, the tooth block positioning rod and the lower positioning rod, which are used as translation elements and lifting elements, during the process of being transmitted to the cavity and the fixed pile frame. Therefore, the forces finally transmitted to them are very small, enabling them to be designed to be more miniaturized than ordinary locking devices, and the equipment cost is lower.

[0026] 2. On the other hand, when operating the first rotating body, the second rotating body and the third rotating body to move the upper wedge block, the locking tooth block and the lower wedge block respectively, through the lever effect at the rotating body and the force amplification effect of the thread pair, the forces required for operating the first rotating body, the second rotating body and the third rotating body can be reduced several times. Also, in most cases, the slope values of the corresponding inclined planes are less than 1. When operating the upper wedge block and the lower wedge block to move by rotating the first rotating body and the third rotating body respectively, the force amplification effect on the inclined plane will be superimposed. Therefore, when operating the locking device to lock, the force required is also much smaller than that required by the usual design, and even can be operated manually, greatly simplifying the operation difficulty and improving the equipment convenience.

[0027] 3. The locking device in the present invention can be designed to be simpler than ordinary locking devices, and the translation elements and lifting elements can be designed to be more miniaturized, which can save the platform space.

[0028] 4. This solution separates the functions of the locking part and the pressure-bearing part, reducing the influence between each component, thereby improving the safety and stability performance of the equipment.

[0029] 5. This solution optimizes the design of vulnerable parts, making the structure of vulnerable parts simpler, and greatly reducing the later maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a three-dimensional axonometric schematic diagram of the locking device.

[0032] Figure 2Schematic perspective view of the structure at a single leg of the lifting platform.

[0033] Figure 3 Schematic perspective view of the cavity of the locking device.

[0034] Figure 4 Schematic side view of the locking device.

[0035] Figure 5 It is along Figure 4 Schematic sectional view after sectioning along 5-5 above.

[0036] Figure 6 It is along Figure 5 Schematic sectional view after sectioning along 6-6 above.

[0037] Figure 7 Schematic perspective exploded view of the locking device.

[0038] Figure 8 Schematic view of the locking device in the unlocked state.

[0039] Figure 9 Schematic view of the locking device in the locked state.

[0040] Figure 10 Schematic view of another embodiment structure of the rotating body.

[0041] Figure 11 Schematic view of the replacement scheme of the upper positioning rod, the tooth block positioning rod and the lower positioning rod.

[0042] Markings in the figure: 1 - Fixed pile frame, 2 - Locking device, 3 - Leg, 4 - Driving gear, 5 - Platform, 31 - Rack of leg, 20 - Cavity, 21 - Upper wedge slot, 22 - Upper wedge block, 23 - Locking tooth block, 24 - Lower wedge block, 25 - Lower wedge slot, 26 - Upper positioning rod, 27 - Tooth block positioning rod, 28 - Lower positioning rod, 201 - Threaded hole, 202 - Top mounting surface, 203 - Side limiting surface, 204 - Rear limiting surface, 205 - Bottom mounting surface, 206 - Outer side plate, 211 - Oblique slot, 212 - First curved surface, 221 - Top inclined surface of wedge block, 222 - Bottom inclined surface, 223 - First T-shaped slot, 224 - Side surface of upper wedge block, 231 - Top inclined surface, 232 - Bottom plane, 233 - Limiting plate, 234 - Second T-shaped slot, 235 - Limiting plane, 236 - Step, 237 - Locking tooth, 241 - Top plane, 242 - Third T-shaped slot, 243 - Bottom inclined surface of lower wedge block, 244 - Side surface of lower wedge block, 251 - Second oblique slot, 252 - Second curved surface, 261 - Main body of upper rod, 262 - First rotating body, 2611 - First shoulder, 271 - Main body of tooth block rod, 272 - Driving block, 273 - Second rotating body, 2721 - Second shoulder, 272 - Driving block, 281 - Main body of lower rod, 2811 - Third shoulder, 282 - Third rotating body. Detailed implementation manners

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0045] It should be noted that the reference numerals and letters in the specification represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention in a simplified manner, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0047] In addition, the terms "horizontal", "vertical", etc. do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0048] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0049] A locking device for a leg-elevating platform, comprising a cavity, an upper wedge groove, an upper wedge block, a locking tooth block, a lower wedge block, a lower wedge groove, an upper positioning rod, a tooth block positioning rod and a lower positioning rod. The upper wedge groove is fixed at the top of the cavity, the lower wedge groove is fixed at the bottom of the cavity, the upper positioning rod, the tooth block positioning rod and the lower positioning rod are respectively installed in the cavity through threaded holes from top to bottom. The axes of the upper positioning rod, the tooth block positioning rod and the lower positioning rod are coplanar and parallel to each other in pairs, and the locking tooth block is installed in the cavity through the tooth block positioning rod.

[0050] The features and performance of the present invention will be further described in detail below in conjunction with embodiments.

[0051] Embodiment 1

[0052] A preferred embodiment of the present invention, as Figure 2, the structure at a single leg of the lifting platform generally consists of a pile fixing frame 1, a locking device 2, a leg 3, and a driving gear 4. The bottom of the pile fixing frame 1 is fixedly connected to the platform 5. The driving gear 4 and the locking device 2 are both positioned and assembled on the pile fixing frame 1. The leg rack 31 is fixed to the leg 3. The driving gear 4 is always meshed with the leg rack 31. Driven by external power, the driving gear 4 can rotate, and at the same time drive the leg 3 and the leg rack 31 to move up and down relative to the pile fixing frame 1 and the platform 5 inside the pile fixing frame. As an optional item in this example, the locking device 2 is arranged at the lower part of the pile fixing frame 1, but it can also be arranged at the upper part of the pile fixing frame 1 according to the situation.

[0053] After the locking device 2 is assembled as Figure 1 shown, the locking device 2 includes a cavity 20, an upper wedge groove 21, an upper wedge block 22, a locking tooth block 23, a lower wedge block 24, a lower wedge groove 25, an upper positioning rod 26, a tooth block positioning rod 27, and a lower positioning rod 28. Among them, the tooth block positioning rod 27 is equivalent to a translation element, the combination of the lower positioning rod 28 and the upper positioning rod 26 is equivalent to a lifting element, and the rest of the components are equivalent to supporting elements.

[0054] As Figure 3 shown, the cavity 20 is a semi-open structure, having a top mounting surface 202, a side limiting surface 203, a rear limiting surface 204, a bottom mounting surface 205, and an outer side plate 206. Threaded holes 201 are provided on the outer side plate 206, and the number of the threaded holes 201 is equal to the total number of the upper positioning rod 26, the tooth block positioning rod 27, and the lower positioning rod 28. The cavity 20 needs to be fixed on the pile fixing frame 1, and generally adopts a design integrated with the pile fixing frame 1.

[0055] The upper wedge groove 21, the upper wedge block 22, the locking tooth block 23, the lower wedge block 24, and the lower wedge groove 25 are all installed inside the cavity 20. The upper wedge groove 21 is fixed on the top mounting surface 202 of the cavity 20; the lower wedge groove 25 is fixed on the bottom mounting surface 205 of the cavity 20. The upper positioning rod 26, the tooth block positioning rod 27, and the lower positioning rod 28 are installed on the outer side plate 206 through the threaded holes 201, and their axes are coplanar and parallel to each other in pairs.

[0056] As Figure 4 shown, the upper positioning rod 26 and the lower positioning rod 28 are respectively distributed at the uppermost and lowermost sides of the outer side plate 206, and the tooth block positioning rod 27 is located in the middle part. The number of the tooth block positioning rods 27 can be determined according to the actual situation, but at least one, and 2 are adopted in this example. When the number of the tooth block positioning rods 27 is 2 or more, the axes of all the tooth block positioning rods 27 need to be coplanar and parallel to each other in pairs.

[0057] Refer to Figures 5 to 7 :

[0058] The top of the upper wedge groove 21 is a first curved surface 212 that matches the top mounting surface 202. The first curved surface 212 is in good contact with the top mounting surface 202, and the top mounting surface 202 can support the force and moment received by the upper wedge groove 21 in the locked state. An inclined groove 211 is provided at the lower part of the upper wedge groove 21. After assembly, the slope of the bottom surface of the inclined groove 211 with respect to the horizontal plane is α, and the two inner side surfaces of the inclined groove 211 are both parallel to the axis of the upper positioning rod 26.

[0059] The top and bottom of the upper wedge block 22 are a wedge block top inclined surface 221 and a bottom inclined surface 222 respectively, and their inclined directions are opposite. After assembly, the slope of the wedge block top inclined surface 221 with respect to the horizontal plane is the same as that of the bottom surface of the inclined groove 211, which is also α, and the slope of the bottom inclined surface 222 with respect to the horizontal plane is β. The height of the end of the upper wedge block 22 opposite to the upper positioning rod 26 is higher than the other end, and a first T-shaped groove 223 is provided. The two side surfaces of the upper wedge block 22 are both flat and are both parallel to the axis of the upper positioning rod 26, and match the two inner side surfaces of the inclined groove 211. The upper wedge block 22 can be inserted into the inclined groove 211. After assembly, the upper wedge block 22 can only move along the axis direction and the vertical direction of the upper positioning rod 26 in the inclined groove 211.

[0060] A plurality of locking teeth 237 are provided on the locking tooth block 23. The number of locking teeth 237 is determined by the locking force required during locking, and is at least one. In this example, 3 are adopted. The top of the locking tooth block 23 is a top inclined surface 231. After assembly, the slope of the top inclined surface 231 with respect to the horizontal plane is the same as that of the bottom inclined surface 222 of the upper wedge block 22, which is also β. The bottom of the locking tooth block 23 is a bottom plane 232, and the bottom plane 232 is parallel to the axis of the tooth block positioning rod 27. A second T-shaped groove 234 is provided on the end surface of the locking tooth block 23 opposite to the tooth block positioning rod 27, and a hole is provided in the middle of the second T-shaped groove 234. Steps 236 are provided on the top inclined surface 231 and the bottom plane 232 respectively, and the side surfaces of the steps are both parallel to the axis of the tooth block positioning rod 27. After assembly, the side surface of the step is in fit with the upper wedge block side surface 224 of the upper wedge block 22 and the lower wedge block side surface 244 of the lower wedge block 24, and can limit the degree of freedom of the locking tooth block 23 in the normal direction of the side surface of the step 236. There are limiting plates 233 at both the upper and lower ends of the end of the locking tooth block 23 far from the tooth block positioning rod 27. When the locking device 2 is in the locked state and the limiting plate 233 abuts against the side limiting surface 203 of the cavity, the movement of the locking tooth block 23 in the direction of the side limiting surface 203 under the action of force can be restricted. The rear part of the locking tooth block 23 is a limiting plane 235, and the limiting plane 235 is always in good contact with the rear limiting surface 204 of the cavity 20. The rear limiting surface 204 can support the force perpendicular to the rear limiting surface 204 received by the locking tooth block 23 in the locked state.

[0061] The top of the lower wedge block 24 is a top plane 241, and the top plane 241 is parallel and fittingly matched with the bottom plane 232 of the locking tooth block 23. After assembly, when the locking tooth block 23 slides only along the axial direction of the tooth block positioning rod 27 on the top plane 241 as a whole, the heights of all points of the locking tooth block 23 will not change. The bottom of the lower wedge block 24 is a bottom inclined plane 243 of the lower wedge block. After assembly, the slope of the bottom inclined plane 243 of the lower wedge block relative to the horizontal plane is γ. The height of the end of the lower wedge block 24 opposite to the lower positioning rod 28 is higher than that of the other end, and a third T-shaped groove 242 is provided. Both side surfaces of the lower wedge block 24 are planes and are parallel to the axis of the lower positioning rod 28.

[0062] The bottom of the lower wedge groove 25 is a second curved surface 252 that matches the bottom mounting surface 205. The second curved surface 252 is in good contact with the bottom mounting surface 205, and the bottom mounting surface 205 can support the force and moment received by the lower wedge groove 25 in the locked state. A second inclined groove 251 is provided in the upper part of the lower wedge groove 25. After assembly, the slope of the bottom surface of the second inclined groove 251 relative to the horizontal plane is the same as that of the bottom inclined plane 243 of the lower wedge block, which is also γ. Both inner side surfaces of the second inclined groove 251 are parallel to the axis of the lower positioning rod 28 and are respectively matched with the two side surfaces of the lower wedge block 24. The lower wedge block 24 can be inserted into the second inclined groove 251. After assembly, the lower wedge block 24 can only move along the axial direction of the lower positioning rod 28 and the vertical direction in the second inclined groove 251.

[0063] The upper positioning rod 26 is mainly composed of an upper rod body 261 and a first rotating body 262. The middle part of the upper rod body 261 is a threaded surface, and the thread on the threaded surface matches the bolt hole at the uppermost part of the threaded hole 201, forming a pair of thread pairs. The upper rod body 261 can be installed on the outer side plate 206 through the bolt hole at the uppermost part of the threaded hole 201 from the inside of the cavity 20. After installation, one end of the upper rod body 261 is located inside the cavity 20, and the other end is located outside the cavity 20. A first shoulder 2611 is provided at the end of the upper rod body 261 located inside the cavity 20. The shape and size of the first shoulder 2611 match those of the first T-shaped groove 223, and the first shoulder 2611 can be inserted and assembled into the first T-shaped groove 223 from the upper and lower ends of the first T-shaped groove 223. The first rotating body 262 is installed at one end of the upper rod body 261 located outside the cavity 20. The radius of the first rotating body 262 is larger than the radius of the threaded surface of the upper rod body 261. By rotating the first rotating body 262, the upper rod body 261 can be screwed into or out of the threaded hole, and then the upper wedge block 22 can be driven to move in the axial direction of the upper rod body 261 by the first shoulder 2611. By moving the upper wedge block 22 to different positions in the upper wedge groove 21, the top inclined surface 221 and the bottom inclined surface 222 of the upper wedge block 22 can be respectively attached to the bottom surface and the top inclined surface 231 of the inclined groove 211 at the same time, or a suitable gap can be left between the top inclined surface 221 of the upper wedge block 22 and the bottom surface of the inclined groove 211 to allow the locking tooth block 23 to have space to rise.

[0064] The tooth block positioning rod 27 is mainly composed of a tooth block rod body 271, a driving block 272, and a second rotating body 273. The middle part of the tooth block rod body 271 is a threaded surface, and the thread on the threaded surface matches the bolt hole in the middle of the threaded hole 201, forming a thread pair. The tooth block rod body 271 can be installed on the outer side plate 206 through the bolt hole in the middle of the threaded hole 201 from the inside of the cavity 20. After installation, one end of the tooth block rod body 271 is located inside the cavity 20, and the other end is located outside the cavity 20. A second shoulder 2721 is provided at one end of the driving block 272. The shape and size of the second shoulder 2721 match those of the second T-shaped groove 234, and the second shoulder 2721 can be installed in the second T-shaped groove 234 through the hole provided in the middle of the second T-shaped groove 234. The other end of the driving block 272 can be fixedly connected to the end of the tooth block rod body 271 located inside the cavity 20. As an optional item in this embodiment, this connection is a bolt flange connection, but this connection can also be a detachable connection form such as an ear plate pin shaft. The second rotating body 273 is installed at one end of the tooth block rod body 271 located outside the cavity 20. The radius of the second rotating body 273 is larger than the radius of the threaded surface of the tooth block rod body 271. By rotating the second rotating body 273, the tooth block rod body 271 can be screwed into or out of the threaded hole, and then the locking tooth block 23 can be driven to move on the top plane 241 of the lower wedge block 24 in the axial direction of the tooth block rod body 271 by the second shoulder 2721.

[0065] The structure of the lower positioning rod 28 is similar to that of the upper positioning rod 26, and it is mainly composed of a lower rod body 281 and a third rotating body 282. The middle part of the lower rod body 281 is a threaded surface, and the thread on the threaded surface matches the bolt hole at the lowermost part of the threaded hole 201, forming a pair of thread pairs. The lower rod body 281 can be installed on the outer side plate 206 through the bolt hole at the lowermost part of the threaded hole 201 from the inside of the cavity 20. After installation, one end of the lower rod body 281 is located inside the cavity 20, and one end is located outside the cavity 20. A third shoulder 2811 is provided at the end located inside the cavity 20. The shape and size of the third shoulder 2811 match those of the third T-shaped groove 242, and the third shoulder 2811 can be inserted and assembled into the third T-shaped groove 242 from the upper and lower ends of the third T-shaped groove 242. The third rotating body 282 is installed at one end of the lower rod body 281 located outside the cavity 20. The radius of the third rotating body 282 is larger than the radius of the threaded surface of the lower rod body 281. By rotating the third rotating body 282, the lower rod body 281 can be screwed into or out of the threaded hole, and then the third shoulder 2811 drives the lower wedge block 24 to move in the axial direction of the lower rod body 281. By moving the lower wedge block 24 to different positions in the lower wedge groove 25, the locking tooth block 23 can be lifted or lowered, and thus the height position of the locking tooth block 23 in the vertical direction can be adjusted.

[0066] The values of the slopes α, β, and γ may be equal or not equal. Selecting appropriate values of α, β, and γ can simultaneously reduce the forces on the upper positioning rod 26, the tooth block positioning rod 27, and the lower positioning rod 28 during the locking or unlocking operation and when the locking device 2 is in the locked state. As an optimal option in this example, the values of α, β, and γ are respectively equal to the static friction factor values between the corresponding two inclined planes. However, due to many difficulties in accurately measuring the static friction factor values in engineering practice, other values that deviate not far from the static friction factor values between the corresponding two inclined planes can be selected for α, β, and γ.

[0067] The state of the locking device 2 when it is not locked is as Figure 8 shown. At this time, the pile leg 3 and the pile leg rack 31 can move up and down relative to the pile fixing frame 1 and the platform 5. During the entire movement process, the various components of the locking device 2 will not interfere with the pile leg 3 and the pile leg rack 31. The locking teeth 237 of the locking tooth block 23 are horizontally offset from the pile leg rack 31 by a certain distance L, and L is always greater than or equal to 0.

[0068] The working principle of this embodiment is as follows: when locking is required, the first rotating body 262, the second rotating body 273 and the third rotating body 282 are operated to rotate, and the upper wedge block 22, the locking tooth block 23 and the lower wedge block 24 are moved to the appropriate position, and finally the limiting plate 233 of the locking tooth block 23 is in contact with the side limiting surface 203 of the cavity 20, so that the locking teeth 237 and the pile leg rack 31 are completely interlaced and meshed with each other, and the top inclined surface 221 and the bottom inclined surface 222 of the upper wedge block 22 are respectively attached to the bottom surface and the top inclined surface 231 of the inclined groove 211, so that the pile leg 3 and the pile frame 2 and the platform 5 form a firm and reliable relative fixed position relationship in the vertical direction, and relative movement is not allowed, thereby achieving the locking purpose. The state of the locking device 2 after locking is as follows Figure 9 shown.

[0069] Since most of the forces and moments received by the locking device 2 in the locked state do not need to pass through the upper positioning rod 26, the tooth block positioning rod 27 and the lower positioning rod 28 as the translation element and the lifting element in the process of being transmitted to the cavity 20 and the pile frame 1, the forces finally transmitted to them are very small, so that they can be designed to be more compact than ordinary locking devices. On the other hand, when the first rotating body 262, the second rotating body 273 and the third rotating body 282 are operated to move the upper wedge block 22, the locking tooth block 23 and the lower wedge block 24 respectively, the lever effect at the rotating body and the force amplification effect of the thread pair can reduce the forces required for operating the first rotating body 262, the second rotating body 273 and the third rotating body 282 by multiples. In most cases, the values of β and γ are less than 1. When the upper wedge block 22 and the lower wedge block 24 are respectively moved by rotating the first rotating body 262 and the third rotating body 282, the force amplification effect on the inclined surface is superimposed. Therefore, when operating the locking device for locking, the force required is much smaller than the force required by the usual design, and it can even be operated manually.

[0070] The first rotating body 262, the second rotating body 273 and the third rotating body 282 in the above example can be modified in their structures to adapt to different forms of driving requirements. Figure 10 As shown, the first rotating body 262, the second rotating body 273 and the third rotating body 282 are changed into a transmission pair in the form of a worm gear, and then a motor can be used to drive. Alternatively, the upper positioning rod 26, the gear block positioning rod 27 and the lower positioning rod 28 are directly replaced by a cylinder, such as Figure 11 As shown, the oil cylinder can be used for driving. However, as mentioned above, the oil cylinder or motor used for driving only needs to be smaller to meet the requirements.

[0071] The above is the embodiment of the present invention. The foregoing are the various preferred embodiments of the present invention. If the preferred embodiments in each preferred embodiment are not obviously self-contradictory or premised on a certain preferred embodiment, each preferred embodiment can be arbitrarily superimposed and combined for use. The embodiments and the specific parameters in the embodiments are only for clearly expressing the inventor's invention verification process and are not used to limit the patent protection scope of the present invention. The patent protection scope of the present invention still takes its claims as the criterion. Any equivalent structural changes made by using the content of the specification of the present invention should, by the same token, be included in the protection scope of the present invention.

Claims

1. A locking device for a leg jack-up platform, characterized in that: It includes a cavity (20), an upper wedge groove (21), an upper wedge block (22), a locking tooth block (23), a lower wedge block (24), a lower wedge groove (25), an upper positioning rod (26), a tooth block positioning rod (27), and a lower positioning rod (28). The upper wedge groove (21) is fixed to the top of the cavity (20), the lower wedge groove (25) is fixed to the bottom of the cavity (20), the upper positioning rod (26), the tooth block positioning rod (27), and the lower positioning rod (28) are sequentially installed in the cavity (20), the axes of the upper positioning rod (26), the tooth block positioning rod (27), and the lower positioning rod (28) are parallel to each other in pairs, and the locking tooth block (23) is installed in the cavity (20) through the tooth block positioning rod (27). The cavity (20) is a semi-open structure. The cavity (20) includes a top mounting surface (202), a side limiting surface (203), a rear limiting surface (204), a bottom mounting surface (205), and an outer side plate (206). A threaded hole (201) is provided on the outer side plate (206), and the position and number of the threaded holes (201) correspond to those of the upper positioning rod (26), the tooth block positioning rod (27), and the lower positioning rod (28). The upper wedge groove (21) is fixed to the top mounting surface (202) of the cavity (20), the lower wedge groove (25) is fixed to the bottom mounting surface (205) of the cavity (20), and the upper positioning rod (26), the tooth block positioning rod (27), and the lower positioning rod (28) are respectively connected to the upper wedge block (22), the locking tooth block (23), and the lower wedge block (24) through the threaded holes (201). An inclined groove (211) is provided at the lower part of the upper wedge groove (21). The slope of the bottom surface of the inclined groove (211) relative to the horizontal plane is the same as the slope of the top inclined surface (221) of the wedge block. The two inner side surfaces of the inclined groove (211) respectively match the two side surfaces of the upper wedge block (22), and the upper wedge block (22) can be inserted into the inclined groove (211). The top of the lower wedge block (24) is a top plane (241). The top plane (241) is parallel and fits with the bottom plane (232) of the locking tooth block (23). The height of the end of the lower wedge block (24) connected to the lower positioning rod (28) is higher than the other end, and a third T-shaped groove (242) is provided on the connected end. A second curved surface (252) matching the bottom mounting surface (205) is provided at the bottom of the lower wedge groove (25), and the second curved surface (252) is in contact with the bottom mounting surface (205).

2. The locking device for a leg-elevating platform according to claim 1, characterized in that: The top and bottom of the upper wedge block (22) are respectively the top inclined surface (221) and the bottom inclined surface (222) of the wedge block. The inclined directions of the top inclined surface (221) and the bottom inclined surface (222) of the wedge block are opposite. The height of the side of the upper wedge block (22) connected to the upper positioning rod (26) is higher than that of the other end. A first T-shaped groove (223) is provided on the side of the upper wedge block (22) connected to the upper positioning rod (26).

3. The locking device for a leg-elevating platform according to claim 2, characterized in that: Both side surfaces of the upper wedge block (22) are flat and parallel to the axis of the upper positioning rod (26). The two side surfaces of the upper wedge block (22) match the two inner side surfaces of the inclined groove (211). The upper wedge block (22) can be inserted into the inclined groove (211). Both side surfaces of the lower wedge block (24) are flat and parallel to the axis of the lower positioning rod (28). The lower wedge block (24) can be inserted into the second inclined groove (251). A third T-shaped groove (242) is provided at the upper end of the lower wedge block (24).

4. The locking device for a leg-elevating platform according to claim 2, characterized in that: The top of the locking tooth block (23) is the top inclined surface (231). The slope of the top inclined surface (231) relative to the horizontal plane is the same as that of the bottom inclined surface (222) of the upper wedge block (22). The bottom of the locking tooth block (23) is the bottom plane (232). The bottom plane (232) is parallel to the axis of the tooth block positioning rod (27).

5. The locking device for a leg-elevating platform according to claim 4, characterized in that: A second T-shaped groove (234) is provided on the end surface of the locking tooth block (23) connected to the tooth block positioning rod (27). A hole for installation is provided in the middle of the second T-shaped groove (234). Steps (236) are respectively provided on the top inclined surface (231) and the bottom plane (232). The convex surfaces of the steps (236) are all parallel to the axis of the tooth block positioning rod (27).

6. The locking device for a leg-elevating platform according to claim 5, characterized in that: Limit plates (233) are provided above and below the end of the locking tooth block (23) far from the tooth block positioning rod (27). The side of the locking tooth block (23) close to the tooth block positioning rod (27) is the limit plane (235). The limit plane (235) fits with the rear limit surface (204) of the cavity (20).

7. The locking device for a leg-elevating platform according to claim 1, characterized in that: The number of the tooth block positioning rods (27) ≥ 1. The tooth block positioning rod (27) includes a tooth block rod main body (271), a driving block (272) and a second rotating body (273). The middle part of the tooth block rod main body (271) is a threaded surface. The thread on the threaded surface matches the bolt hole in the middle of the threaded hole (201) to form a thread pair. The tooth block rod main body (271) is installed on the outer side plate (206) through the bolt hole in the middle of the threaded hole (201). One end of the driving block (272) is provided with a second shoulder (2721).

8. The locking device for a leg-elevating platform according to claim 1, wherein: The upper positioning rod (26) includes an upper rod body (261) and a first rotating body (262). The upper rod body (261) is installed on the outer side plate (206) through a threaded hole (201). One end of the upper rod body (261) is located inside the cavity (20), and the other end of the upper rod body (261) is located outside the cavity (20). A first shoulder (2611) is provided at one end of the upper rod body (261) inside the cavity (20). The shape and size of the first shoulder (2611) respectively match those of the first T-shaped groove (223) and the third T-shaped groove. The first shoulder (2611) is inserted and assembled into the first T-shaped groove (223) and the third T-shaped groove through the upper and lower ends of the first T-shaped groove (223). The structure of the lower positioning rod (28) is the same as that of the upper positioning rod (26).

Images