A torpedo anchor containing an inflatable air bag

Abstract

The present invention discloses a torpedo anchor containing an expansion airbag, comprising an anchor body, anchor wings and an anchor head, wherein an expansion control airbag is arranged between the anchor body and the anchor head. The expansion control airbag comprises a gas generation chamber and a folding airbag, wherein an opening of the gas generation chamber is connected to the folding airbag, and sodium nitride powder and an electric heating control device are arranged in the gas generation chamber. After the electric heating control device is turned on, the present invention will slowly heat the air in the chamber to the decomposition temperature of sodium azide, at which time the sodium azide will rapidly decompose and release a huge amount of nitrogen, which will expand the folding airbag, increase the horizontal cross-sectional area of ​​the torpedo anchor, and greatly improve the pull-out bearing capacity of the torpedo anchor.

Description

Technical Field

[0001] The invention relates to the technical field of seabed anchoring, in particular to a torpedo anchor containing an expansion air bag. Background Art

[0002] With the continuous development of offshore oil and gas resources and marine minerals, the strategic position of offshore resources has become increasingly important. my country is a country with a large demand for oil and gas, importing about 3.5 billion barrels of oil from foreign countries in 2021. However, there are at least 23 billion tons of oil that have been proven in the South my country Sea, which can be called the second Persian Gulf, and the reserves of natural gas and minerals are also extremely rich. In recent years, the development of marine oil and gas resources has gradually shifted from shallow waters to deep seas. Fixed platforms are generally only suitable for shallow waters because their costs increase with depth, while most of the deep-sea areas use relatively more applicable floating platforms. The floating platform relies on its own buoyancy to support the weight of its upper part, and anchors the platform through a mooring system; the mooring system, as a component of the deep-sea floating structure, plays a vital role in its operational safety. The torpedo anchor is a type of power installation anchor that has appeared in recent years. Compared with other anchor types, it has the advantages of not requiring various auxiliary devices, simple installation and short cycle, low economic cost, and the installation cost is less affected by the increase in water depth. It is widely regarded as one of the most promising deep-sea anchoring foundations.

[0003] When heated, sodium azide will violently decompose into metallic sodium and nitrogen before reaching its melting point, generating a large amount of gas. According to relevant research, only 75g of a gas generator whose main component is sodium azide can generate a pressure of 0.21MPa in a 60L pressure chamber after burning for 35ms. It is often used in the design of airbags in the aerospace and transportation fields because of its ability to generate huge amounts of gas. The bearing capacity of the torpedo anchor after installation is mostly derived from the lateral friction between the soil and the anchor body. However, in the soft soil environment on the seabed, the lateral friction is often not ideal due to the low strength of the soil. In shallow water, the torpedo anchor's falling kinetic energy is insufficient, resulting in a small penetration depth. The torpedo anchor often suffers from excessive lateral displacement due to insufficient bearing capacity, and gradually loses its bearing capacity until it slips. Summary of the invention

[0004] Purpose of the invention: In order to overcome the shortcomings of the background technology, the present invention discloses a torpedo anchor containing an inflatable air bag

[0005] Invention content: The torpedo anchor with an expansion airbag disclosed in the present invention comprises an anchor body, anchor wings and an anchor head, wherein an expansion control airbag is arranged between the anchor body and the anchor head.

[0006] After the torpedo anchor is inserted into the soft soil, the expansion control airbag is expanded and squeezed into the surrounding soil, effectively enhancing the pull-out bearing capacity of the torpedo anchor.

[0007] Furthermore, the expansion control airbag includes a gas generating chamber and a folding airbag. The gas generating chamber opening is connected to the folding airbag. Sodium nitride powder and an electric heating control device are provided in the gas generating chamber. When the sodium nitride powder is heated, a huge amount of nitrogen is released, forming an ultra-high air pressure inside the airbag.

[0008] Furthermore, the electric heating control device includes a remote control receiving device, a battery and a heating resistor, and the sodium nitride powder is isolated by a partition. The opening time of the folding airbag can be controlled at any time according to needs.

[0009] Furthermore, a connecting rod is inserted through the middle of the folding airbag and the gas generating chamber, and both ends of the connecting rod are respectively inserted into the anchor body and the anchor head and fixed, so that the anchor body, the folding airbag, the gas generating chamber and the anchor head are connected and fixed in sequence, and the end connection of the folding airbag is sealed.

[0010] Furthermore, a telescopic bracket assembly is arranged between the connecting rod and the folding airbag, and the telescopic bracket assembly includes a plurality of telescopic rods radially extending from the connecting rod toward the periphery and a quadrilateral articulated bracket arranged at the extended end of each telescopic rod, and the extended end of the quadrilateral articulated bracket is connected to the inner wall of the folding airbag.

[0011] Furthermore, the telescopic bracket assemblies are evenly spaced around the outer circumference of the connecting rod, and adjacent quadrilateral hinged brackets are hinged to each other to form an integral telescopic bracket structure.

[0012] Furthermore, the telescopic rod is a one-way telescopic rod, including a sleeve rod connected to the connecting rod and an inner rod connected to the quadrilateral hinged bracket, the sleeve rod is provided with sliding holes at intervals along the extension direction, the inner rod is placed in the sleeve rod, and the inner end side is connected to a one-way inclined surface block through a spring, and its inclined surface is arranged in the extension direction, the inner rod extends out from the sleeve rod, and the one-way inclined surface blocks slide and engage one by one in the sliding holes.

[0013] Furthermore, grooves are spaced apart on the outer circumference of the connecting rod, and the ends of the telescopic rod are placed in the grooves to achieve fixation.

[0014] Furthermore, the anchor body is a hollow steel cylinder structure filled with counterweight material, the anchor wings are multiple steel sheet structures fixed at equal angular intervals around the anchor body, and the anchor head is a steel cone structure, whose maximum diameter is the same as that of the anchor body.

[0015] Beneficial effects: Compared with the prior art, the advantages of the present invention are:

[0016] 1. The present invention utilizes the hollow space of a conventional torpedo anchor. Not only does it fill the hollow space with objects that increase mass like conventional torpedo anchors, but it also provides an expansion air bag in the torpedo anchor to directly increase the end bearing area of ​​the torpedo anchor, which effectively increases the vertical pull-out bearing capacity of the torpedo anchor, and also increases the lateral friction resistance of the torpedo anchor, thereby greatly enhancing the performance of the torpedo anchor.

[0017] 2. The present invention uses sodium azide powder to produce a huge amount of gas to obtain the air pressure required for the expansion of the airbag. The required sodium azide volume is small, and the space occupied by other related components is also small. The total mass of the torpedo anchor will not be excessively weakened, resulting in a significant decrease in penetration depth and weakening of bearing capacity. The generated gas is nitrogen, which is relatively stable in nature;

[0018] 3. The materials and equipment such as the remote control heating device used in the structure of the present invention are all cheap materials that are easy to obtain and prepare, have high cost performance, and are easy to transform the traditional torpedo anchor;

[0019] 4. The present invention sets a telescopic bracket inside the airbag, and the built-in one-way telescopic rod can only be telescoped in one direction. After the airbag is inflated, it can become the supporting skeleton inside it, enhance the structural strength of the airbag, and further improve the pull-out bearing capacity and stability of the torpedo anchor. At the same time, even if the air pressure inside the airbag drops due to gas escape after a long time, the torpedo anchor can still maintain most of its bearing capacity;

[0020] 5. The present invention increases the end bearing area by means of airbag expansion, which is very suitable for the soft soil environment of the ocean. The airbag is less difficult to expand in soft soil, and the engineering installation difficulty of the invention is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the overall structure diagram of the present invention;

[0022] Figure 2 It is a cross-sectional view of the present invention;

[0023] Figure 3 This is a structural diagram of the electric heating control device of the present invention;

[0024] Figure 4 A top view of the telescopic support assembly of the present invention in a retracted state;

[0025] Figure 5 A top view of the telescopic support assembly of the present invention in an extended state;

[0026] Figure 6 This is a structural diagram of the telescopic rod and quadrilateral hinged bracket of the present invention;

[0027] Figure 7 It is a cross-sectional view of the telescopic rod of the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figure 1 The torpedo anchor with an expansion airbag shown in the figure comprises an anchor body 1, anchor wings 2 and an anchor head 3, wherein an expansion control airbag 4 is arranged between the anchor body 1 and the anchor head 3. The end bearing area can be greatly increased by the expansion of the airbag, directly and effectively enhancing the pull-out bearing capacity of the torpedo anchor.

[0030] like Figure 2 As shown, the expansion control airbag 4 includes a gas generating chamber 401 and a folding airbag 402. The gas generating chamber 401 adopts a circular metal container, and the folding airbag 402 is a high-strength rubber fetal membrane. The opening of the gas generating chamber 401 is connected to the folding airbag 402. Sodium nitride powder and an electric heating control device 404 are provided in the gas generating chamber 401.

[0031] like Figure 3 As shown, the electric heating control device 404 includes a remote control receiving device 404-1, a battery 404-2 and a heating resistor 404-3, and the sodium nitride powder is isolated by a partition 404-4. The remote control receiving device 404-1 can receive an infrared signal from the outside to make the heating resistor 404-3 energized and start to heat slowly, and the partition 404-4 can prevent the sodium azide powder from directly touching the resistor wire and causing excessive heating.

[0032] A connecting rod 403 is inserted through the middle of the folded airbag 402 and the gas generating chamber 401, and the two ends of the connecting rod 403 are respectively inserted into the anchor body 1 and the anchor head 3 and fixed. This embodiment adopts threaded connection and fixation to realize the sequential connection and fixation of the anchor body 1, the folded airbag 402, the gas generating chamber 401 and the anchor head 3, and the end connection of the folded airbag 402 is sealed.

[0033] like Figure 4-6 As shown, a telescopic bracket assembly 5 is arranged between the connecting rod 403 and the folding airbag 402, and the telescopic bracket assembly 5 includes a plurality of telescopic rods 501 radially extending from the connecting rod 403 to the outer periphery and a quadrilateral hinged bracket 502 arranged at the extended end of each telescopic rod 501, and the extended end of the quadrilateral hinged bracket 502 is connected to the inner wall of the folding airbag 402. The telescopic bracket assembly 5 is evenly spaced around the outer periphery of the connecting rod 403, and adjacent quadrilateral hinged brackets 502 are hinged to each other to form an integral telescopic bracket structure.

[0034] like Figure 6 and 7As shown, the telescopic rod 501 is a unidirectional telescopic rod, including a sleeve rod 501-1 connected to the connecting rod 403 and an inner rod 501-2 connected to the quadrilateral hinged bracket 502, the sleeve rod 501-1 is provided with sliding holes 501-3 at intervals along the extension direction, the inner rod 501-2 is placed in the sleeve rod 501-1, and the inner end side is connected to a unidirectional inclined surface block 501-4 through a spring, and its inclined surface is arranged in the extension direction, the inner rod 501-2 extends out from the sleeve rod 501-1, and the unidirectional inclined surface blocks 501-4 slide and engage one by one in the sliding holes 501-3.

[0035] The outer circumference of the connecting rod 403 is provided with grooves at intervals, and the ends of the telescopic rod 501 are placed in the grooves to achieve fixation.

[0036] The anchor body 1 is a hollow steel cylinder structure filled with weights to increase the torpedo anchor's falling kinetic energy and penetration depth. The anchor wings 2 are multiple steel sheet structures fixed at equal angles around the anchor body 1. The anchor head 3 is a steel cone structure with the same maximum diameter as the anchor body 1 and a tip angle of 30°.

[0037] The installation steps are as follows:

[0038] 1: Transport the torpedo anchor assembly to the predetermined sea surface location.

[0039] Second: Assemble the torpedo anchor assembly. First, inject enough sodium azide powder into the gas generation chamber, then put the gas generation chamber on the connecting rod, and connect the bottom of the connecting rod to the upper end of the anchor tip, and then connect the end of the sleeve rod to the slot in the middle of the connecting rod. Fold the folding airbag and glue the bottom to the outer side of the upper end of the anchor tip. Glue the quadrilateral hinged bracket to the inside of the folding airbag. Finally, connect the upper part of the connecting rod to the bottom of the anchor body, and glue the upper end of the folding airbag to the outer side of the lower end of the anchor body.

[0040] 3: Start the remote-controlled electric heating device in the gas generation chamber and drop the torpedo anchor through cranes and other equipment.

[0041] 4: After the torpedo anchor falls freely in the water, it penetrates into the seabed with huge kinetic energy.

[0042] 5. The electric heating control device slowly heats the sodium azide powder, causing it to decompose and release a large amount of nitrogen, which inflates the folding airbag and squeezes into the surrounding soil. At the same time, the folding airbag drives the internal telescopic bracket to extend, playing a role in skeleton support.

Claims

1. A torpedo anchor containing an inflatable air bag, characterized in that: It comprises an anchor body (1), an anchor wing (2) and an anchor head (3), wherein an expansion control air bag (4) is provided between the anchor body (1) and the anchor head (3); The expansion control airbag (4) comprises a gas generation chamber (401) and a folding airbag (402); the gas generation chamber (401) has an opening that is in communication with the folding airbag (402); sodium nitride powder and an electric heating control device (404) are provided in the gas generation chamber (401); A connecting rod (403) is inserted through the middle of the folding airbag (402) and the gas generating chamber (401), and two ends of the connecting rod (403) are respectively inserted into the anchor body (1) and the anchor head (3) and fixed, so that the anchor body (1), the folding airbag (402), the gas generating chamber (401) and the anchor head (3) are connected and fixed in sequence, and the end connection of the folding airbag (402) is sealed.

2. The torpedo anchor containing an inflatable airbag according to claim 1, characterized in that: The electric heating control device (404) comprises a remote control receiving device (404-1), a battery (404-2) and a heating resistance wire (404-3), and is isolated from sodium nitride powder by an interlayer (404-4).

3. The torpedo anchor containing an inflatable airbag according to claim 1, characterized in that: A telescopic support assembly (5) is arranged between the connecting rod (403) and the folding airbag (402), the telescopic support assembly (5) comprising a plurality of telescopic rods (501) extending radially from the connecting rod (403) toward the outer periphery, and a quadrilateral hinged support (502) arranged at an extended end of each telescopic rod (501), the extended end of the quadrilateral hinged support (502) being connected to the inner wall of the folding airbag (402).

4. The torpedo anchor containing an inflatable airbag according to claim 3, characterized in that: The telescopic support assemblies (5) are evenly spaced around the outer circumference of the connecting rod (403), and adjacent quadrilateral hinged supports (502) are hinged to each other to form an integral telescopic support structure.

5. The torpedo anchor containing an inflatable airbag according to claim 3, characterized in that: The telescopic rod (501) is a unidirectional telescopic rod, comprising a sleeve rod (501-1) connected to a connecting rod (403) and an inner rod (501-2) connected to a quadrilateral hinged bracket (502); the sleeve rod (501-1) is provided with sliding holes (501-3) at intervals along an extension direction; the inner rod (501-2) is placed in the sleeve rod (501-1), and a unidirectional inclined surface block (501-4) is connected to the inner end side through a spring, wherein the inclined surface is arranged in the extension direction; the inner rod (501-2) extends out of the sleeve rod (501-1), and the unidirectional inclined surface blocks (501-4) slide and engage in the sliding holes (501-3) one by one.

6. The torpedo anchor containing an inflatable airbag according to claim 3, characterized in that: The outer circumference of the connecting rod (403) is provided with slots at intervals, and the ends of the telescopic rod (501) are placed in the slots to achieve fixation.

7. The torpedo anchor containing an inflatable airbag according to claim 1, characterized in that: The anchor body (1) is a hollow steel cylindrical structure filled with counterweight material; the anchor wings (2) are a plurality of steel sheet structures fixed at equal angular intervals around the anchor body (1); and the anchor head (3) is a steel cone structure, the maximum diameter of which is the same as that of the anchor body (1).

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