High-reliability underwater depth-keeping triggering device

Abstract

The utility model discloses a high-reliability underwater depth setting trigger device which comprises a rack, a sliding block is arranged on the inner wall of the rack in a sliding mode, one end of the rack is of an open structure, the other end of the rack is of a closed structure, and the two ends of the sliding block are connected with a first air spring and a second air spring through first connecting pieces respectively. The second air spring is connected with the closed structure through a second connecting piece. When the device reaches the set water depth and continuously sinks, the water pressure exceeds the inflation pressure of the air spring, the piston rod of the air spring gradually retracts under the external water pressure, and when the sum of the retraction strokes of the first air spring and the second air spring reaches L, the main body structure and the balance weight of the underwater equipment are separated, and triggering is completed. When one air spring cannot retract due to faults, the trigger device sinks to a larger depth, the other air spring retracts by L, at the moment, no matter which air spring works normally, the piston rod, extending out of the rack, of the first air spring retracts by L, the device can still complete triggering, and the triggering reliability of the device is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of underwater equipment technology, and in particular to a highly reliable underwater depth-determining triggering device. Background Technology

[0002] Underwater equipment, especially some deep-water deployment equipment, sometimes requires a purely mechanical depth-determining triggering device due to limitations in structure, signal acquisition, and power. This device enables a specific action to be triggered at a specific depth during continuous descent, without external signals or power sources. The underwater environment is complex, and unforeseen events are frequent; the stability of the triggering mechanism directly affects the operational stability of the underwater equipment. If the triggering mechanism fails to activate properly, critical functions of the equipment will be impossible to achieve, or even the operation will fail. In such cases, the precision requirement for the triggering depth is often not high, but failure to trigger can have fatal consequences. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a highly reliable underwater depth-determining triggering device. This device discloses a highly reliable underwater triggering device that can be triggered at a specific underwater depth without the need for external signals or power sources.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A high-reliability underwater depth-determining triggering device includes a frame, a slider slidably disposed on the inner wall of the frame, one end of the frame is an open structure and the other end is a closed structure, and both ends of the slider are respectively connected to an air spring 1 and an air spring 2 through a connector 1. The air spring 2 is connected to the closed structure through the connector 2, and the end of the air spring 1 away from the slider extends out of the open structure.

[0006] Preferably, both connector one and connector two include screws. The screws are connected to air spring one and air spring two respectively through pre-set screw holes one at both ends of the slider, and the screws are connected to air spring two through pre-set screw holes two on the closed structure.

[0007] Preferably, the slider has a hollow structure.

[0008] Preferably, the air spring one and the air spring two have the same specifications.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: When the device reaches the set water depth and continues to sink, the water pressure exceeds the air spring inflation pressure. The piston rod of the air spring gradually retracts under the external water pressure. When the sum of the retraction strokes of air spring one and air spring two reaches L, the separation of the main structure of the underwater equipment and the counterweight is realized, and the triggering is completed. When one of the air springs fails to retract, the triggering device sinks to a greater depth, and the other air spring retracts L. At this time, regardless of which air spring is working normally, the piston rod of air spring one extending out of the frame retracts L, and the device can still complete the triggering, ensuring the reliability of the device triggering. Attached Figure Description

[0010] To illustrate the technical solutions in the embodiments of this utility model or the prior art more specifically and intuitively, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0011] Figure 1 This is a schematic diagram of the structure proposed in this utility model;

[0012] Figure 2 This is a schematic diagram of the working structure of a specific embodiment of the present utility model.

[0013] In the diagram: trigger device body 1, air spring one 11, frame 12, slider 13, air spring two 14, screw 15, underwater equipment main structure 2, counterweight 3. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figure 1-2 A highly reliable underwater depth-determining triggering device includes a frame 12, a slider 13 slidably disposed on the inner wall of the frame 12, one end of the frame 12 is an open structure and the other end is a closed structure, both ends of the slider 13 are respectively connected to an air spring 11 and an air spring 14 through a connector 1, the air spring 14 is connected to the closed structure through the connector 2, and the end of the air spring 11 away from the slider 13 extends out into the open structure.

[0016] When the device reaches the set water depth and continues to sink, the water pressure exceeds the air spring inflation pressure. The piston rod of the air spring gradually retracts under the external water pressure. When the sum of the retraction strokes of air spring 11 and air spring 24 reaches L, the underwater equipment main structure 2 and the counterweight 3 are separated, and the triggering is completed. When one of the air springs fails to retract due to a malfunction, the triggering device sinks to a greater depth, and the other air spring retracts L. At this time, regardless of which air spring is working normally, the piston rod of air spring 11 extending out of the frame 12 retracts L, and the device can still complete the triggering, ensuring the reliability of the device triggering.

[0017] The extension length of air spring 11 is greater than or equal to the designed trigger stroke L. When the device reaches the set water depth and continues to sink, the water pressure exceeds the inflation pressure of air spring 11 or air spring 14. The piston rod of the air spring gradually retracts under the external water pressure. When the piston rod of air spring 14 retracts by L / 2, it drives the slider 13 and air spring 11 to retract L / 2 into the frame 12 together. At the same time, the piston rod of air spring 11 retracts by L / 2, and its piston rod extending out of the frame 12 retracts by a total of L, thus completing the triggering.

[0018] After inflation, the inflation pressure can be rechecked by testing the rebound force of the air spring at its initial position.

[0019] When one of the air springs fails to retract due to a malfunction, the triggering device sinks to a greater depth, and the other air spring retracts by L. At this time, regardless of which air spring is working normally, the piston rod of air spring 11 extending out of frame 12 will retract by L, and the device can still complete the triggering.

[0020] Air spring inflation pressure calculation:

[0021] Using the Clapeyron equation to analyze the air spring in its inflated state and its retracted state by water pressure (L / 2), ignoring atmospheric pressure changes, we have:

[0022] P0·V0 / T0=P1·(V0- L / 2·S) / T1 ①

[0023] In the formula, P0 is the air spring inflation pressure.

[0024] V0 is the volume inside the cylinder when the air spring is fully extended;

[0025] T0 is the temperature when the air spring is inflated;

[0026] P1 is the design trigger water pressure;

[0027] S is the cross-sectional area of ​​the piston rod;

[0028] T1 is the water temperature. The deep sea water temperature is usually constant at 4℃, or 277K.

[0029] The rearranged form ① has:

[0030] P0 = P1·(V0- L / 2·S)·T0 / (V0·T1) ②

[0031] The air spring inflation pressure can be calculated from the designed trigger water depth according to equation ②.

[0032] Further analysis of the air spring's retraction state L under water pressure reveals the following:

[0033] P1·(V0- L / 2·S) / T1= P2·(V0- L·S) / T1 ③

[0034] In the formula, P2 is the minimum water pressure when the air spring retracts by L.

[0035] Arrangement ③ yields:

[0036] P2= P1 ·(V0- L / 2·S) / (V0- L·S) ④

[0037] Due to the structural characteristics of air springs, P2 is usually less than 120% of P1. That is, when an air spring fails, the trigger water depth does not exceed 20% of the normal trigger water depth. By optimizing the selection and structural dimensions of air springs, the difference between the trigger water depth when an air spring fails and the normal trigger water depth can be further reduced.

[0038] In this embodiment, both connector one and connector two include screws 15. Screws 15 are connected to air spring one 11 and air spring two 14 respectively through pre-set screw holes one at both ends of slider 13. Screws 15 are connected to air spring two 14 through pre-set screw holes two on the closed structure.

[0039] In this embodiment, slider 13 is a hollow structure, and air spring 11 and air spring 2 14 have the same specifications.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-reliability underwater depth-determining triggering device, comprising a frame (12), characterized in that, The inner wall of the frame (12) is slidably provided with a slider (13). One end of the frame (12) is an open structure and the other end is a closed structure. Both ends of the slider (13) are connected to an air spring (11) and an air spring (14) respectively through a connector. The air spring (14) is connected to the closed structure through the connector. The end of the air spring (11) away from the slider (13) extends out into the open structure.

2. The high-reliability underwater depth-deep triggering device according to claim 1, characterized in that, Both connector one and connector two include screws (15). The screws (15) are connected to air spring one (11) and air spring two (14) respectively through the screw holes one at both ends of the slider (13). The screws (15) are connected to air spring two (14) through the screw holes two on the closed structure.

3. The high-reliability underwater depth-deep triggering device according to claim 2, characterized in that, The slider (13) is a hollow structure.

4. The high-reliability underwater depth-deep triggering device according to claim 3, characterized in that, The specifications of the air spring one (11) and the air spring two (14) are the same.

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