A still water pressure release device testing apparatus for life rafts

Abstract

The present application relates to a kind of life raft hydrostatic pressure release device test device, including balance support, life raft rotation fixed seat, hanger, rope, positioning disc;Hanger is eccentric circular arc shape, bottom is fixed with balance support, top has a for suspending the whole test device suspension hole;Balance support includes a pair of parallel side frame, life raft rotation fixed seat is rotationally fixed on side frame, raft rotation fixed seat supports life raft;Rope is tied in rotation fixed seat on life raft, hydrostatic pressure release device is fixed on rope;Positioning disc includes center spool and peripheral chuck, rope is wound on center spool, peripheral chuck is fixed with the lock catch of raft rotation fixed seat and is engaged;At least one side of side frame is fixed with first arc-shaped steering fixed plate, raft rotation fixed seat is equipped with corresponding second arc-shaped steering fixed plate;First arc-shaped steering fixed plate is equipped with a plurality of first angle locking hole, second arc-shaped steering fixed plate is equipped with corresponding second angle locking hole.

Description

Technical Field

[0001] This invention relates to a test device for a hydrostatic pressure release device for a life raft, belonging to the technical field of hydrostatic pressure release device simulation test. Background Technology

[0002] Life rafts are an essential life-saving facility for vessels operating on water, serving as the most direct and rapid self-rescue tool in the event of a maritime accident. Currently, inflatable life rafts are used both domestically and internationally. Simply pulling the starter cable inflates the life raft's tires, enabling it to function as a rescue vehicle in the water.

[0003] Life rafts are normally packaged and stored in fiberglass storage cylinders and installed on a special raft frame on the ship's side. In case of emergency, the raft can be thrown directly into the water, and the inflatable life raft will automatically inflate to its shape for passengers in distress. If the ship sinks too quickly and there is no time to throw the raft into the water, when the ship sinks to a certain depth (underwater pressure), the hydrostatic pressure release device on the raft frame will automatically disengage, releasing the life raft, which will then float to the surface and automatically inflate to its shape.

[0004] Therefore, the simulation test of the hydrostatic pressure release device needs to simulate the operation of the hydrostatic pressure release device at a set underwater depth when the rope is tied to the life raft. At the same time, it is also necessary to simulate the operation of the hydrostatic pressure release device when the life raft (hydrostatic pressure release device) is at different tilt angles.

[0005] GB / T 23299-2009 "Ship and Marine Technology - Hydrostatic Release Devices" and IMO Lifesaving Equipment Testing Committee Resolution MSC.81(70) require the following tests: This test shall be conducted using the largest and smallest life rafts on which the hydrostatic release device can be installed. If the difference in occupancy between the largest and smallest life rafts exceeds 25 people, a raft with an intermediate occupancy number shall also be selected. The life raft shall be laid flat on a platform with sufficient weight to submerge it in water. The hydrostatic release device and mooring lines shall be installed in a manner consistent with those on board. In water depths not exceeding 4 m, the release device shall automatically release the mooring lines securing the life raft storage tank, separating it from the mother ship. The following performance tests shall be conducted in appropriate water depths. The platform with the life raft attached shall be lowered into the water as follows: 1. Horizontal (sinking horizontally); 2. With the hydrostatic release device at the top, tilted at 45°, then 100°; 3. With the hydrostatic release device at the bottom, tilted at 45°, then 100°; 4. Vertical (sinking vertically longitudinally); In all the above simulations of the sinking angle of a real ship, the hydrostatic release device shall release the life raft at a depth of less than 4m (the release depth shall not exceed 4m).

[0006] Currently, testing standards for hydrostatic pressure release devices have been established, but there are no specific testing methods and devices. In the existing technology, each testing unit or manufacturer simply assembles and builds a testing organization for a single project, which has problems such as a single sinking angle of the pressure release device (single case of shipwreck), a single test product, cumbersome testing steps, many testing procedures, slow testing speed, difficult operation, and large differences in test data due to differences in testing organizations and methods. Summary of the Invention

[0007] The purpose of this invention is to provide a test device for a hydrostatic pressure release device for life rafts, which can stably fix life rafts of different sizes and complete the action test of the hydrostatic pressure release device under the condition of accurately simulating different life raft sinking angles.

[0008] The present invention adopts the following technical solution:

[0009] A hydrostatic pressure release device for a life raft includes a balance support 1, a life raft rotating base 6, a hanger 2, a rope 13, and a positioning plate 10. The hanger 2 is eccentrically arc-shaped, fixed at the bottom to the balance support 1, and has a suspension hole at the top for suspending the entire test device. The balance support 1 includes a pair of parallel side frames, and the life raft rotating base 6 is rotatably fixed to the side frames, supporting the life raft 11. The rope 13 binds the life raft 11 to the rotating base 6, and the hydrostatic pressure release device is fixed to the rope 13. The positioning plate 10 includes a central reel and an outer chuck, with the rope wound around the central reel 13 and the outer chuck connected to the life raft rotating base 6. The latch 8 on the fixed seat 6 is engaged and fixed; at least one side of the side frame is fixed with a first arc-shaped turning fixing plate 14, and the raft rotating fixing seat 6 is provided with a corresponding second arc-shaped turning fixing plate 601; the first arc-shaped turning fixing plate 14 is provided with a plurality of first angle locking holes 1401, and the second arc-shaped turning fixing plate 601 is provided with a corresponding second angle locking hole 601a; the hanger 2 has two functions: the life raft rotating fixing seat 6, after being tied, is hoisted onto the balance support 1 at a set angle; after the entire device is installed and positioned on land, the hanger 2 is lifted by an external device to put the entire device into the water; and, the entire device can be lifted and put into the water in the same posture during each test.

[0010] Preferably, the same posture means that the entire device remains vertical and the bottom surface of the balancing support is always parallel to the water surface.

[0011] Preferably, a vertical height adjustment rod 4 is fixedly provided in the middle of the side frame, and a sleeve rod 602 is provided on the life raft rotating fixing seat 6, which is sleeved on the height adjustment rod 4 and can be adjusted and locked in height. The bottom of the sleeve rod 602 is fixedly connected to the second steering fixing plate 601.

[0012] Preferably, the balance support 1 is U-shaped, with side frames on both sides, the side frames being triangular, and a base frame at the bottom. Four rectangular tubes are fixedly connected to the base frame, and several threaded holes are opened at the positions of the two middle rectangular tubes to fix the hanger 2. The hanger 2 is provided with a circular tube air chamber, and reinforcing ribs are fixedly connected to the side frames and the base frame respectively. A bearing seat 3 is fixedly connected to the top of each side frame.

[0013] Furthermore, the balance support 1 is also provided with a hinge device bearing seat 7 and a hinge shaft 9, which stores the rope 13.

[0014] Furthermore, a bearing is installed in the bearing seat 3 on each side of the frame. The bearing is rotatably connected to the height adjustment rod 4. The height adjustment rod is fixedly connected to the life raft rotating fixed seat 6 by positioning pins.

[0015] Furthermore, the life raft rotating and fixing base 6 is U-shaped, with a rectangular base frame at the bottom and triangular side frames on both sides. Two rectangular tubes are fixedly connected to one side of the base frame of the life raft rotating and fixing base 6. Two rope device bearing seats 7 are fixedly connected to the left rectangular tube on the same surface. One rope device bearing seat 7 is fixedly connected to the right rectangular tube. A locking buckle 8 is set in the rope device bearing seat on the left rectangular tube. A bearing is set in the two rope device bearing seats 7 at corresponding positions on the left and right rectangular tubes. The two bearings are coaxially rotatably connected to a rope shaft 9. A positioning plate 10 is arranged at the left end of the rope shaft 9. The life raft 11 is placed on the life raft rotating and fixing base 6.

[0016] Preferably, the life raft pressure release device 12 is inserted by a rope 13, the two ends of the rope 13 are pressed against the life raft 11 and wrapped around the hinge shaft 9, and the rope 13 can be tightened by rotating the positioning plate 10, and an anti-reverse mechanism is provided on the positioning plate 10.

[0017] Preferably, two pin holes are provided on the upper part of the two side frames of the balance bracket 1, and several positioning holes are opened at the corresponding positions on the two height adjustment rods. The positioning pins 16 are inserted into the corresponding positioning holes of the two side frames and the left and right height adjustment rods of the balance bracket 1 in the water.

[0018] Preferably, the special angle that the life raft rotating fixing seat 6 can be rotated to on the first arc-shaped steering fixing plate 14 is 0°, 45°, 100°, -45°, -100°, or vertical.

[0019] This invention fully simulates the shipwreck process, providing a test device that allows the hydrostatic pressure release device to be tested, along with an inflatable life raft bound to it, to be submerged in water. The device tests whether the hydrostatic pressure release device can release correctly and accurately at a standard specified water depth. It is easy to use and operate, eliminates the influence of human factors, and can complete the testing of all standard-specified parameters on a single device. This includes accommodating inflatable life rafts of different sizes and sizes, as well as testing the hydrostatic pressure release device of the life raft under test at various angles and positions. It is a test device for hydrostatic pressure release devices of inflatable life rafts that eliminates and reduces the influence of human factors in testing, improves the accuracy of monitoring data, and enhances the convenience and practicality of testing. It provides complete test items and data. Attached Figure Description

[0020] Figure 1 This is a front view of the test device for the hydrostatic pressure release device of the life raft of the present invention.

[0021] Figure 2 This is a left view of the test device for the hydrostatic pressure release device of the life raft of the present invention.

[0022] Figure 3 This is a schematic diagram of the rotating and fixed base of the life raft in the hydrostatic pressure release device test apparatus of the present invention, with rotational positioning at various set angles.

[0023] Figure 4 This is a schematic diagram of the life raft being suspended vertically into the water after being tied to a balance support, according to the present invention's test device for hydrostatic pressure release device.

[0024] In the figure, 1. Balance bracket, 2. Hanger, 3. Balance bracket bearing seat, 4. Height adjustment rod, 6. Life raft rotating fixing seat, 7. Hinged rope device bearing seat, 8. Lock, 9. Hinged rope shaft, 10. Positioning plate, 11. Life raft (11), 12. Hydrostatic pressure release device, 13. Rope, 14. First arc-shaped steering fixing plate, 16. Positioning pin, 601. Second arc-shaped steering fixing plate, 601a. ​​Second angle locking hole, 602. Sleeve rod, 1401. First angle locking hole. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] See Figure 1-3A test device for a hydrostatic pressure release device for an inflatable life raft: The balance support 1 is generally U-shaped, with side frames on both sides forming a triangle and a base frame at the bottom. Four rectangular tubes are fixedly connected to the base frame, and several threaded holes are opened at the positions of the two middle rectangular tubes. An open eccentric boom 2 is fixedly connected to the base frame. A circular tube air chamber is provided on the open eccentric boom. Two reinforcing ribs are fixedly connected to the side frames and the base frame respectively. A bearing seat 3 is fixedly connected to the top of the side frames respectively.

[0027] Each of the two side frames has a bearing in the bearing seat 3. The two side bearings are rotatably connected to the height adjustment rod 4. The height adjustment rod is fixedly connected to the life raft rotating fixed seat 6 at the corresponding position by the positioning pin.

[0028] The life raft rotating and fixing base 6 is U-shaped, with a rectangular base frame at the bottom and triangular side frames on both sides. Two rectangular tubes are fixedly connected to one side of the base frame of the life raft rotating and fixing base 6. Two rope device bearing seats 7 are fixedly connected vertically to the same surface of the left rectangular tube. One rope device bearing seat 7 is fixedly connected to the right rectangular tube. A locking buckle 8 is installed in the rope device bearing seat on the left rectangular tube. A bearing is installed in the two rope device bearing seats 7 at corresponding positions on the left and right rectangular tubes. The two bearings are coaxially rotatably connected to a rope shaft 9. A positioning plate 10 is installed at the left end of the rope shaft 9.

[0029] An inflatable life raft 11 is placed on the rotating mounting base 6. A rectangular structure is fixedly connected to the other side of the base frame of the rotating mounting base 6. The rectangular tube structure is connected to one end of the hydrostatic pressure release device 12 of the life raft to be tested. A rope 13 passes through the other end of the hydrostatic pressure release device 12. The two ends of the rope 13 are pressed against the inflatable life raft 11 and wrapped around the hinge shaft 9. The rotating positioning plate 10 can tighten the rope 13. An anti-reverse mechanism is set on the positioning plate 10.

[0030] Two pin holes are provided on the upper sides of the balance bracket 1, and several positioning holes are opened at the corresponding positions on the two height adjustment rods. The positioning pins 16 are inserted into the corresponding positioning holes of the balance bracket 1 on both sides and the left and right height adjustment rods in the water.

[0031] An arc-shaped first steering fixing plate 14 is fixedly connected to the middle position of the right side frame of the balance bracket 1. Several pin holes are opened on the first steering fixing plate 14 to adjust the rotation of the life raft rotating fixing seat 6 to a special angle. A similar second arc-shaped steering fixing plate 601 is also fixedly connected below the height adjustment rod 4. Several positioning holes are opened at the corresponding positions on the second arc-shaped steering fixing plate 601, and positioning pins are inserted into the corresponding positioning holes of the first steering fixing plate 14 and the second arc-shaped steering fixing plate 601.

[0032] It should be noted that, see Figure 2From the perspective of this figure, the first steering fixing plate 14 and the second arc-shaped steering fixing plate 601 are actually overlapping, so this figure adopts a simplified drawing method, and each is drawn in half.

[0033] Several equally spaced pin holes are opened on both sides of the life raft rotating base 6. At the same time, several positioning holes are opened at corresponding positions on the two height adjustment rods to adjust the life raft rotating base 6 to a specific height. The positioning pins are inserted into the corresponding positioning holes on both sides of the life raft rotating base 6 and the left and right height adjustment rods.

[0034] Multiple stop holes are formed around the circumference of the positioning disk. Locking buckles are inserted into these holes to stop the disk from rotating on the rectangular tube of the life raft's rotating mounting base 6, thus forming an anti-reverse mechanism for the positioning disk. This technical solution has a simple structure and reliable anti-reverse effect.

[0035] The first steering fixing plate 14 can adjust the life raft rotating fixing seat 6 to rotate to specific angles of 0°, 45°, 100°, -45°, and -100°. Figure 3 As shown, it meets the testing standard requirements and solves the problem of the pressure relief device having a single sinking angle (only applicable to sunken ships). Furthermore, it can simulate vertical angles, such as... Figure 4 As shown, the vertical position simulates the angle of a completely vertical shipwreck. In this case, the side frame can be used as the connection point for rope hoisting.

[0036] Generally, a structure in which one first steering fixing plate 14 is fixedly connected on one side can be used to simplify the structure and achieve the desired effect. Of course, the first steering fixing plate 14 can also be set on both sides.

[0037] By adjusting the relative positions of the first steering fixing plate 14 and the life raft rotating fixing seat 6, the life raft rotating fixing seat 6 can be positioned at different angles to allow the life raft to be released underwater at 0°, 45°, 100°, -45°, -100°, and vertically. By adjusting the relative positions of the left and right side frames and the height adjustment rod of the life raft rotating fixing seat 6, the life raft rotating fixing seat 6 can be positioned at different heights. The hinge rope device set on the life raft rotating fixing seat 6 can accommodate the installation of life rafts of different specifications, including four specifications: φ1100, φ1000, φ900, and φ800, with a maximum length of 2700mm. This solves the problems of limited testing products, cumbersome testing procedures, and difficult operation.

[0038] The gantry 2 serves two purposes: after the entire device is installed and positioned on land, it is lifted by an external device to lower the entire device into the water; and it ensures that the entire device can be lifted and lowered into the water in the same state during each test (the entire device remains vertical, and the bottom surface of the balance support is always parallel to the water surface). The gantry, equipped with an air chamber, also serves to balance buoyancy and simulate a shipwreck.

[0039] The present invention uses a fixed connection bracket 2 with a circular tube air chamber inside it to balance the weight of the open eccentric boom by using the buoyancy of the circular tube air chamber, so that the underwater balance support can better simulate the process of shipwreck.

[0040] The weight of the balance support in the water is greater than the buoyancy of the inflatable life raft. This not only allows the entire device to sink into the water, better simulating the sinking state of a ship, but also balances the unbalanced buoyancy generated after the inflatable life raft is rotated and fixed at various angles. The balance angle of the device is no greater than 2 degrees.

[0041] The above are preferred embodiments of the present invention. Those skilled in the art can make various modifications or improvements based on these embodiments. Without departing from the overall concept of the present invention, such modifications or improvements should fall within the scope of protection claimed by the present invention.

Claims

1. A life raft hydrostatic release unit testing device, characterized in that: it comprises a balancing support (1), a life raft rotating fixing seat (6), a hanger (2), a rope (13) and a positioning disc (10); the hanger (2) is in the shape of an eccentric circular arc, the bottom is fixed with the balancing support (1), and the top has a suspension hole for suspending the whole testing device; the balancing support (1) comprises a pair of parallel side frames, the life raft rotating fixing seat (6) is rotatably fixed on the side frames, and the seat (6) supports the life raft (11); the rope (13) binds the life raft (11) to the seat (6), and the hydrostatic release unit (12) is fixed on the rope (13); the positioning disc (10) comprises a central reel and a peripheral chuck, the rope is wound on the central reel (13), and the peripheral chuck is fixed with the lock (8) on the seat (6); at least one side of the side frame is fixed with a first arc-shaped turning fixing plate (14), the seat (6) is provided with a corresponding second arc-shaped turning fixing plate (601), the first arc-shaped turning fixing plate (14) is provided with a plurality of first angle locking holes (1401), and the second arc-shaped turning fixing plate (601) is provided with corresponding second angle locking holes (601a); after the whole device is installed and positioned on land, the hanger (2) is lifted by an external device to put the whole device into water; and the whole device can be lifted and put into water in the same posture every time. The same posture refers to that the whole device is kept vertical, and the bottom surface of the balancing support is always parallel to the water surface. The middle part of the side frame is fixed with a vertical height adjusting rod (4), the seat (6) is provided with a sleeve rod (602) which is sleeved on the height adjusting rod (4) and can adjust and lock the height, and the bottom of the sleeve rod (602) is fixedly connected with the second arc-shaped turning fixing plate (601).

4. The life raft hydrostatic release unit testing device according to claim 1, characterized in that: the balancing support (1) is in the shape of a n, the two sides are the side frames, the side frames are triangular, the bottom is a base frame, the base frame is fixedly connected with four rectangular tubes, a plurality of threaded holes are formed in the positions of the middle two rectangular tubes, the hanger (2) is fixedly connected, the hanger (2) is provided with a circular tube air chamber, the two side frames and the base frame are respectively fixedly connected with reinforcing ribs, and one bearing seat (3) is fixedly connected above each side frame. The balancing support (1) is further provided with a hinged rope device bearing seat (7) and a hinged rope shaft (9), the hinged rope shaft (9) accommodates the rope (13). One bearing is arranged in each bearing seat (3) on the side frames, the bearings are rotatably connected with the height adjusting rods (4), and the height adjusting rods are fixedly connected with the life raft rotating fixing seat (6) through positioning pins. ​ ​ 2. The liferaft hydrostatic pressure releaser testing device according to claim 1, characterized in that ​ 3. The liferaft hydrostatic pressure releaser testing device according to claim 1, characterized in that: ​ ​ ​ 5. The liferaft hydrostatic pressure releaser testing apparatus of claim 3, wherein: ​ 6. The liferaft hydrostatic pressure releaser testing apparatus of claim 3, wherein: ​ 7. The liferaft hydrostatic pressure releaser testing apparatus of claim 3, wherein: The life raft rotating fixing base (6) is in the shape of a n, the bottom is a bottom frame in the shape of a rectangle, the two sides are side frames in the shape of a triangle, one side of the bottom frame of the life raft rotating fixing base (6) is fixedly connected with two rectangular tubes, a hinged rope device bearing seat (7) is fixedly connected on the same surface of the left rectangular tube, a hinged rope device bearing seat (7) is fixedly connected on the right rectangular tube, a lock buckle (8) is arranged in the hinged rope device bearing seat on the left rectangular tube, a bearing is arranged in each of the two hinged rope device bearing seats (7) at the corresponding positions of the two rectangular tubes, the two bearings are coaxially connected with a hinged rope shaft (9), a positioning disc (10) is arranged on the left end of the hinged rope shaft (9), and the life raft (11) is placed on the life raft rotating fixing base (6).

8. The liferaft hydrostatic pressure releaser testing apparatus of claim 1, wherein: The life raft hydrostatic pressure releaser (12) is penetrated by a rope (13), two sections of the rope (13) are pressed on the life raft (11) and are wound on the hinged rope shaft (9), the rotating positioning disc (10) can tighten the rope (13), and an anti-reverse mechanism is arranged on the positioning disc (10).

9. The liferaft hydrostatic pressure releaser testing apparatus as claimed in claim 1, characterized in that: Pin holes are arranged on the upper portions of the two side frames of the balance support (1), a plurality of positioning holes are formed on the corresponding positions of the two height adjusting rods, and a positioning pin shaft (16) is inserted into the corresponding positioning holes of the two side frames and the two height adjusting rods.

10. The liferaft hydrostatic pressure releaser testing apparatus as claimed in claim 1, characterized in that: The first arc-shaped turning fixing plate (14) can adjust the special angles of the life raft rotating fixing base (6) to be 0°, 45°, 100°, -45°, -100° and vertical.

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