A connection and separation device employing winding locking and fusion triggering

Abstract

This invention belongs to the field of aerospace vehicle technology, and particularly relates to a connection and separation device employing winding locking and fusible triggering. It includes: a release device comprising a segmented body, a winding spring, a fusible wire, and a wire; one end of the winding spring is connected to the segmented body, and the other end is connected to the fusible wire; and a separation body comprising a connecting rod and a body to be separated, the connecting rod being inserted into the segmented body. In the locked state, the fusible wire is tensioned under the action of the winding spring, the segmented body is wound and tightened by the winding spring, and the end of the connecting rod is fixed within the segmented body. In the unlocked separation state, the fusible wire breaks upon energization, the winding spring releases its restriction on the segmented body, the connecting rod is released from the segmented body, and the separation body separates from the release device. The connection and separation device of this invention has advantages such as fast response speed, low cost, wide application temperature range, simple structure, light weight, large load capacity, low impact, and no pollution.

Description

Technical Field

[0001] This invention belongs to the field of aerospace vehicle technology, and particularly relates to a connection and separation device that employs winding locking and fusion triggering. Background Technology

[0002] The primary function of connection and separation devices in spacecraft is to reliably connect the components to be separated to the base before separation, and reliably disconnect them upon receiving a separation signal. Spacecraft require various connection and separation devices to achieve connection and unlocking / separation functions between specific components, such as the separation of multi-stage launch vehicles or the deployment of solar panels on satellites or spacecraft. Currently, connection and separation devices used in spacecraft mainly include pyrotechnic connection and separation devices and non-pyrotechnic connection and separation devices using shape memory alloys. Pyrotechnic connection and separation devices primarily use explosive detonation to generate driving force to trigger the separation of the components, but their application is severely limited due to problems such as high impact, pollution, and inability to be repeatedly tested. Shape memory alloy connection and separation devices utilize electrical heating to bring the shape memory alloy to its phase transition temperature for triggering, but the phase transition temperature is typically below 100°C, resulting in a very narrow operating temperature range for the device. Furthermore, because the output force of shape memory alloy wires is low, a load amplification mechanism is required, making the device more complex and slower to respond.

[0003] Currently, developing non-pyrotechnic connection and separation devices that are small in size, light in weight, low in impact, fast in response, and pollution-free is one of the research hotspots for those skilled in the art. The applicant filed a Chinese patent with publication number CN102788537B through early research, which discloses a fused SMA wire spatial connection and separation mechanism. This connection and separation mechanism is equipped with: a split nut, a binding spring for the split nut, and a release device for the binding spring. The release device for the binding spring consists of two SMA wires. One end of the first wire is connected to the upper end of the binding spring of the split nut, and the other end is connected to the upper end of the outer shell. Under the action of the binding spring, it is in a tensioned state. One end of the second SMA wire is connected to the lower end of the binding spring of the split nut, and the other end is connected to the lower end of the outer shell. Under the action of the binding spring, it is in a tensioned state. When the two SMA wires are heated by a large current, a huge recovery stress is generated inside due to a phase change. At the same time, the fracture strength of the material decreases due to the high temperature. Under the combined action of the two, the wires break, releasing the constraint on the binding spring. The split nut opens, thereby releasing the bolt and realizing the separation of the separate body. This connection and separation mechanism is small, low-impact, and pollution-free. However, it also suffers from drawbacks such as a relatively complex structure, a heavy prototype, slow response, and long unlocking / separation time. Furthermore, the SMA wire (shape memory alloy) used in this mechanism is expensive to produce. Combined with the high preload force it experiences in the device, and as a disposable consumable, the device has high requirements for the performance and material of the SMA wire, resulting in a high cost for the final, compliant SMA wire and a high operating cost for the device.

[0004] In view of the above, this application is hereby submitted. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned technical problems by providing a connection and separation device that is simple in structure, small in size, light in weight, low in cost, low in impact, pollution-free, and has a rapid response, enabling quick unlocking and separation of the separated parts.

[0006] In view of this, the present invention provides a connection and separation device employing winding locking and fusion triggering, comprising:

[0007] A release device includes: a split body, a winding spring, a fuse, and a wire. The winding spring is wound around the periphery of the split body. One end of the winding spring is connected to the split body, and the other end is connected to the fuse and fixed by the fuse. The fuse is also electrically connected to the wire.

[0008] A separator, comprising: a connecting rod and a body to be separated, wherein one end of the connecting rod is inserted into the split body;

[0009] In the locked state, the fuse is tensioned under the action of the winding spring, the segment body is wound and tightened by the winding spring, and the end of the connecting rod is fixed in the segment body;

[0010] In the unlocked and separated state, the fuse breaks when energized, the winding spring releases its restriction on the segmented body, the connecting rod is released from the segmented body, and the separated body separates from the release device.

[0011] Furthermore, the fuse is selected from one or more of the following: nickel-chromium alloy wire, lead-antimony alloy wire, silver-copper alloy wire, iron-chromium-aluminum alloy wire, copper wire, and tin wire.

[0012] Furthermore, the fuse is a nickel-chromium alloy wire.

[0013] Furthermore, the end of the winding spring is detachably connected to the segmented body. One end of the winding spring is set as a straight end. Correspondingly, multiple positioning holes are provided in the circumferential direction of the segmented body. In use, the straight end of the winding spring can be inserted into the appropriate positioning hole as needed. The other end of the winding spring is set as a hook end, and the fuse is hooked on the hook end.

[0014] Furthermore, the release device also includes a conductive tube and an insulating base, wherein the fuse is connected to a wire through the conductive tube.

[0015] Furthermore, the segmented body is evenly divided into multiple segments in the circumferential direction. When each segment of the segmented body is wound and tightened by the winding spring, the segmented body is cylindrical, and a receiving cavity is formed inside the segmented body to accommodate and fix the connecting rod.

[0016] Furthermore, the release device also includes a separation spring located on the wall between two adjacent petals in the segmented body. When the winding spring wraps around and tightens the segmented body, the separation spring is compressed. When the fuse breaks and the winding spring releases its restriction on the segmented body, the separation spring loses its compressive force and quickly recovers its deformation to separate the petals in the segmented body.

[0017] Furthermore, blind holes are provided on the wall surface between two adjacent petals in the segmented body, and the separation springs are disposed in the blind holes and are evenly distributed in the circumference of the segmented body.

[0018] Furthermore, one end of the connecting rod inserted into the segmented body is an expansion end with a gradually increasing cross-sectional area, and correspondingly, the accommodating cavity inside the segmented body has a curved surface that fits with the expansion end.

[0019] Furthermore, the expanded end of the connecting rod is a centrally symmetrical shape.

[0020] The beneficial effects of the present invention are as follows: The connection and separation device of the present invention has the following advantages:

[0021] (1) Fast response: Under the condition of current of 5 to 10A, the release time of the connection and separation device described in this invention is less than 70ms;

[0022] (2) Low cost: The connection and separation device of the present invention uses a fuse wire instead of an SMA wire. Compared with the SMA wire, the fuse wire has the advantages of low price, good mechanical properties, wide range of applications and fast response speed.

[0023] (3) Wide application temperature range: The connection and separation device described in this invention will not fail when the ambient temperature is below 1000℃, and can be used in ambient temperatures above 1000℃.

[0024] (4) Simple structure: Compared with existing non-pyrotechnic connection and separation devices, the connection and separation device of the present invention contains fewer components, has a simple structure, and is easy to manufacture;

[0025] (5) Lightweight: The prototype of this invention weighs only 80g, while the non-fire-working connection and separation device of shape memory alloy generally weighs more than 100g under the same load.

[0026] (6) Wide load-bearing range: The connection and separation device of the present invention has a wide load-bearing range, and its load-bearing capacity can be changed with the specifications and dimensions of the winding spring;

[0027] (7) Low impact: The present invention uses a winding spring to generate preload. During the unlocking and separation process, the spring gradually loosens and the load is gradually released, which greatly reduces the impact when the connecting rod separates.

[0028] (8) No pollution: Compared with pyrotechnics, the components used in this invention do not produce pollutants after unlocking and separation.

[0029] In summary, the connection and separation device of the present invention has many advantages, such as fast response speed, low cost, wide application temperature range, simple structure, light weight, large load capacity, low impact, and no pollution. Attached Figure Description

[0030] Figure 1 This is a cross-sectional structural diagram of the connection and separation device of the present invention in the locked state;

[0031] Figure 2 This is a three-dimensional structural diagram of the winding spring in the connection and separation device of the present invention;

[0032] Figure 3 This is a schematic diagram of the internal structure of the connection and separation device described in this invention;

[0033] Figure 4 This is a schematic diagram of the separation spring and positioning hole in the connection and separation device of the present invention;

[0034] Figure 5 This is a cross-sectional structural diagram of the connection and separation device of the present invention in the unlocked and separated state;

[0035] Figure 6 The release time of the connection separation device described in this invention under different currents;

[0036] The markings in the diagram are as follows:

[0037] 1. Locking nut; 2. Connecting rod; 3. Body to be separated; 4. Split body; 5. Outer shell; 6. Top cover; 7. Base; 8. Winding spring; 801. Straight end; 802. Hook end; 9. Fuse wire; 10. Insulating base; 11. Conductive tube; 12. Wire; 13. Separation spring; 14. Positioning hole. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0039] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0040] It should be noted that the term "and / or" in the specification and claims of this application means at least one of the connected objects, and the character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0041] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0042] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0043] like Figures 1-5 As shown, a connection / disconnection device employing winding locking and fusible triggering includes:

[0044] The release device includes: a split body 4, a winding spring 8, a fuse 9, and a wire 12. The winding spring 8 is wound around the periphery of the split body 4. One end of the winding spring 8 is connected to the split body 4, and the other end is connected to the fuse 9 and fixed by the fuse 9. The fuse 9 is also electrically connected to the wire 12.

[0045] The separator includes a connecting rod 2 and a body to be separated 3, with one end of the connecting rod 2 inserted into the splitting body 4;

[0046] In the locked state, the fuse 9 is in a tensioned state under the action of the winding spring 8, the segment body 4 is wound and tightened by the winding spring 8, and the end of the connecting rod 2 is fixed in the segment body 4.

[0047] In the unlocked and separated state, the fuse 9 is energized and breaks, the winding spring 8 releases its restriction on the split body 4, the connecting rod 2 is released from the split body 4, and the separating body separates from the release device.

[0048] Specifically, the fuse 9 is a metal wire that can be melted under the action of an electric current.

[0049] As some examples of the present invention, the fuse 9 can be a nickel-chromium alloy wire, a lead-antimony alloy wire, a silver-copper alloy wire, an iron-chromium-aluminum alloy wire, a copper wire, a tin wire, etc. When selecting the specific material of the fuse 9, factors such as the operating environment of the connection / separation device, mechanical performance requirements, fusing temperature, and current flow can be considered to achieve the required fusing performance.

[0050] Preferably, the fuse 9 is a nickel-chromium alloy wire.

[0051] Compared to other fusible metal wires, nickel-chromium alloy wire has excellent electrical conductivity and mechanical properties, and a relatively high melting point, which can reach over 1000℃. The connection and separation device will not fail at ambient temperatures below 1000℃, making it suitable for high-temperature environments. The resulting connection and separation device has a wide application temperature range.

[0052] It should be noted that in the connection and separation device described in this invention, after power is applied, the fuse 9 heats up rapidly under the Joule heating effect and its mechanical strength decreases. At the same time, since the winding spring 8 exerts a pulling force on the fuse 9, the fuse 9 will break due to weakened performance before reaching its melting point.

[0053] As some examples of the present invention, in the connection and separation device described in the present invention, factors affecting the unlocking and separation time include the properties of the fuse material, the tension at the end of the winding spring, and the current, etc. Based on a set of tested data: Figure 6 As shown, using a 0.15mm NiCr alloy wire, with a current of 10A and a load of 5000N, the connection / separation device of this invention can achieve unlocking and separation within 20ms; and under current conditions of 5-10A, the release time of the connection / separation device of this invention is less than 70ms. In contrast, the unlocking and separation time of existing non-pyrotechnic connection / separation devices is generally over 0.5s. Therefore, it is evident that the connection / separation device of this invention can significantly improve response speed and reduce unlocking and separation time.

[0054] Therefore, the connection and separation device described in this invention has a simple structure, small size, light weight, and no pollution during use. More importantly, in this invention, a fuse wire 9 is used instead of the SMA wire in the prior art, which has the advantages of wider applicability, lower price, and faster response speed compared to the SMA wire.

[0055] As some examples of the present invention, the end of the winding spring 8 can be connected to the segmented body 4 by means of insertion, riveting, welding, snap-fitting, etc.

[0056] Preferably, the end of the winding spring 8 is detachably connected to the segment body 4.

[0057] More preferred, such as Figure 2 and 4 As shown, one end of the winding spring 8 is set as a straight end 801. Correspondingly, a positioning hole 14 is provided on the segmented body 4. The straight end 801 of the winding spring 8 is inserted into the positioning hole 14 to realize the insertion between the winding spring 8 and the segmented body 4.

[0058] As some examples of the present invention, the positioning hole 14 is an insertion hole arranged vertically on the segmented body 4. Multiple positioning holes 14 are arranged circumferentially on the segmented body 4. In use, the straight end 801 of the winding spring 8 can be inserted into a suitable positioning hole 14 as needed. The purpose of arranging multiple positioning holes 14 circumferentially is to facilitate adjustment of the tightness of the winding spring 8 and flexibly change its clamping force on the segmented body 4.

[0059] Furthermore, such as Figure 2 and 3 As shown, the other end of the winding spring 8 is configured as a hook end 802, and the fuse 9 is hooked on the hook end 802 to realize the connection between the winding spring 8 and the fuse 9. This connection method can facilitate the adjustment of the preload between the winding spring 8 and the fuse 9.

[0060] Furthermore, the release device also includes a conductive tube 11 and an insulating base 10, wherein the conductive tube 11 is disposed on the insulating base 10, and the fuse 9 is connected to the wire 12 through the conductive tube 11.

[0061] Specifically, the fuse 9 is connected to the wire 12 via the conductive tube 11 as follows: both ends of the fuse 9 pass through the two limiting holes on the insulating base 10, and then the extended end and the wire 12 are inserted into the conductive tube 11 at the same time. The conductive tube 11 is then pressed with hydraulic pliers or a jack and placed in the groove on the side of the split body 4.

[0062] By setting up the insulating base 10 and the conductive tube 11, while realizing the electrical connection between the fuse 9 and the wire 12, the insulating base 10 and the conductive tube 11 can also be used to tighten and fix the fuse 9, so that the fuse 9 can exert a stable and continuous limiting effect on the winding spring 8 in the locked state.

[0063] Furthermore, the installation of the insulating base 10 and the conductive tube 11 makes it easier to replace the fuse 9.

[0064] As some examples of the present invention, the release device further includes: a housing 5 disposed around the winding spring 8, and a certain gap is reserved between the inner surface of the housing 5 and the winding spring 8, so that when the release device releases the separation body, the winding spring 8 and the split body 4 can deform freely without being constrained or restricted by the housing 5.

[0065] As examples of the present invention, the release device further includes: a base 7 and a top cover 6, the top cover 6 being disposed on the base 7, and the winding spring 8 and the split body 4 being disposed on the top cover 6. The arrangement of the outer shell 5 and the top cover 6 creates a semi-enclosed space outside the winding spring 8 and the split body 4, preventing the deformation and movement of the winding spring 8 and the split body 4 from being disturbed by external factors. Simultaneously, it ensures that the device will not generate excess contaminants to the outside world after separation.

[0066] As some examples of the present invention, the segmented body 4 can be divided into multiple segments, such as 2 to 6 segments. When each segment of the segmented body 4 is wound and tightened by the winding spring 8, the segmented body 4 is cylindrical, and a receiving cavity is formed inside the segmented body 4 to accommodate and fix the connecting rod 2.

[0067] Preferably, the segmented body 4 is uniformly divided into multiple segments in the circumferential direction.

[0068] More preferably, the segmented body 4 can be evenly divided into two segments in the circumferential direction, and the two segments of the segmented body 4 are tightly attached to each other under the action of the winding spring 8, thereby limiting and locking the connecting rod 2.

[0069] Furthermore, the release device also includes a separation spring 13, which is located on the wall between two adjacent petals in the petal body 4. When the winding spring 8 wraps around and tightens the petal body 4, the separation spring 13 is compressed. When the fuse 9 breaks and the winding spring 8 releases its restriction on the petal body 4, the separation spring 13 loses its compressive force and, while rapidly recovering its deformation, separates the petals in the petal body 4, so that the connecting rod 2 can be released from the petal body 4 more quickly and easily.

[0070] Furthermore, a blind hole is provided on the wall surface between two adjacent petals in the split body 4 to accommodate and fix the separation spring 13, and the separation spring 13 is disposed in the blind hole.

[0071] As some examples of the present invention, the separation spring 13 may be provided between some adjacent petals in the petal body 4, or between all adjacent petals.

[0072] Preferably, the separation springs 13 are evenly distributed circumferentially on the split body 4.

[0073] Furthermore, one end of the connecting rod 2 inserted into the segmented body 4 is shaped like a cone, trumpet, sphere, or hemisphere with a gradually expanding cross-sectional area. This creates an expanded end at the end of the connecting rod 2. Correspondingly, the accommodating cavity within the segmented body 4 has a conical, arc-shaped, or hemispherical surface that fits against the end of the connecting rod 2. This allows the cross-sectional area of ​​the contact portion between the segmented body 4 and the end of the connecting rod 2 to gradually expand, enabling the segmented body 4 to reliably lock the connecting rod 2.

[0074] Preferably, the expansion end of the connecting rod 2 is a centrally symmetrical shape, so that the connecting and separating device can withstand the offset load within a certain angle range and has stronger adaptability.

[0075] Furthermore, the separating body also includes a locking nut 1, which is installed on the connecting rod 2 and generates a preload force on the connecting rod 2 and the separating body 3 during the tightening process of the locking nut 1.

[0076] As some examples of the present invention, the end of the connecting rod 2 is threaded, the body to be separated 3 is placed on the connecting rod 2, and the body to be separated 3 is connected and fixed to the connecting rod 2 by locking nut 1.

[0077] It should be noted that in this invention, the form of the body to be separated 3 is not limited, and it can be set according to the needs of use, and it only needs to be fixedly connected to the connecting rod 2.

[0078] The following describes the connection locking process and the unlocking / disconnection process of the connection / disconnection device described in this invention:

[0079] First, the fuse 9 passes through the two limiting holes on the insulating base 10, and then the protruding end and the wire 12 are inserted into the conductive tube 11 at the same time. Then, the conductive tube 11 is pressed with hydraulic pliers or a jack and placed in the groove on the side of the split body 4, and connected to the external controller and power supply.

[0080] Then insert the connecting rod 2 in the separator into the hole in the middle of the split body 4, and place the separation spring 13 between the petals in the split body 4. Insert the straight end 801 of the winding spring 8 into the positioning hole 14 on the split body 4, then tighten the winding spring 8 to clamp the split body 4, and finally connect the hook end 802 of the winding spring 8 to the fuse 9.

[0081] Then, place the assembled components from the previous steps into the outer casing 5, cover it with the top cover 6, and fix it to the base 7 with screws to complete the assembly process of the device.

[0082] When the separation device receives a separation signal and unlocks, wire 12 is energized, and fuse 9 rapidly heats up under the Joule heating effect. Because the hook end 802 of the winding spring 8 exerts a pulling force on fuse 9, fuse 9 breaks due to performance degradation before reaching its melting point. Afterwards, the restriction of the winding spring 8 is released, and the winding spring 8 relaxes under its own elastic force, thus releasing the clamping effect on the split body 4. Then, under the action of the separation spring 13 and the connecting rod 2, the split body 4 quickly separates, releasing the connecting rod 2, thereby separating the body 3 from the base 7.

[0083] After unlocking and separating, the reconnection device can be reused by simply replacing fuse 9; all other parts can be reused.

[0084] In summary, the connection and separation device of the present invention has the following advantages:

[0085] (1) Fast response: Under the condition of current of 5 to 10A, the release time of the connection and separation device described in this invention is less than 70ms;

[0086] (2) Low cost: The connection and separation device of the present invention uses a fuse wire instead of an SMA wire. Compared with the SMA wire, the fuse wire has the advantages of low price, good mechanical properties, wide range of applications and fast response speed.

[0087] (3) Wide application temperature range: The connection and separation device described in this invention will not fail when the ambient temperature is below 1000℃, and can be used in ambient temperatures above 1000℃.

[0088] (4) Simple structure: Compared with existing non-pyrotechnic connection and separation devices, the connection and separation device of the present invention contains fewer components, has a simple structure, and is easy to manufacture;

[0089] (5) Lightweight: The prototype of this invention weighs only 80g, while the non-fire-working connection and separation device of shape memory alloy generally weighs more than 100g under the same load.

[0090] (6) Wide load-bearing range: The connection and separation device of the present invention has a wide load-bearing range, and its load-bearing capacity can be changed with the specifications and dimensions of the winding spring;

[0091] (7) Low impact: The present invention uses a winding spring to generate preload. During the unlocking and separation process, the spring gradually loosens and the load is gradually released, which greatly reduces the impact when the connecting rod separates.

[0092] (8) No pollution: Compared with pyrotechnics, the components used in this invention do not produce pollutants after unlocking and separation.

[0093] In summary, the connection and separation device of the present invention has many advantages, such as fast response speed, low cost, wide application temperature range, simple structure, light weight, large load capacity, low impact, and no pollution.

[0094] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A connection separation device with a wrap-up locking and a fuse triggering, characterized in that, The release device comprises a split body (4), a winding spring (8), a fuse (9) and a wire (12), one end of the winding spring (8) is connected with the split body (4), the other end is connected with the fuse (9) and is fixed by the fuse (9), and the fuse (9) is electrically connected with the wire (12). The split body comprises a connecting rod (2) and a body to be separated (3), one end of the connecting rod (2) is inserted into the split body (4). In the locked state, the fuse (9) is in tension state under the action of the winding spring (8), the split body (4) is tightly wrapped by the winding spring (8), and the end of the connecting rod (2) is fixed in the split body (4). In the unlocked and separated state, the fuse (9) is broken by electricity, the restriction of the winding spring (8) on the split body (4) is released, the connecting rod (2) is released from the split body (4), and the split body is separated from the release device. The end of the winding spring (8) is detachably connected with the split body (4), one end of the winding spring (8) is provided as a straight end (801), and a plurality of positioning holes (14) are provided on the circumference of the split body (4), the straight end (801) of the winding spring (8) is inserted into the appropriate positioning hole (14) according to the need, the other end of the winding spring (8) is provided as a hook end (802), and the fuse (9) is hooked on the hook end (802). The release device further comprises a conductive pipe (11) and an insulating seat (10), and the fuse (9) is connected with the wire (12) through the conductive pipe (11). The connection mode of the fuse (9) with the wire (12) through the conductive pipe (11) is that the two ends of the fuse (9) pass through two limiting holes on the insulating seat (10), then the extending end and the wire (12) are inserted into the conductive pipe (11) at the same time, the conductive pipe (11) is pressed by a hydraulic clamp or a jack, and then it is placed in the groove on the side of the split body (4). The fuse (9) is selected from one or more of nickel-chromium alloy wire, lead-antimony alloy wire, silver-copper alloy wire, iron-chromium-aluminum alloy wire, copper wire and tin wire.

2. The connection separation device according to claim 1, characterized in that The fuse (9) is a nickel-chromium alloy wire.

3. The connection separation device according to claim 2, characterized in that The split body (4) is evenly divided into multiple parts in the circumferential direction, when each part of the split body (4) is tightly wrapped by the winding spring (8), the split body (4) is in a cylindrical shape, and a containing cavity for containing and fixing the connecting rod (2) is formed in the interior of the split body (4).

4. The connection separation apparatus according to claim 1, wherein ​ 5. The connection separation device according to claim 1 or 4, characterized in that The release device further comprises a separation spring (13) located on the wall between two adjacent segments of the segmented body (4), which is compressed when the winding spring (8) winds and tightens the segmented body (4); when the fuse wire (9) breaks and the restriction of the winding spring (8) on the segmented body (4) is released, the separation spring (13) loses compression force and quickly recovers deformation to separate the segments in the segmented body (4).

6. The connection separation apparatus according to claim 5, wherein A blind hole is arranged on the wall between two adjacent segments of the segmented body (4), and the separation spring (13) is arranged in the blind hole, which is uniformly distributed in the circumferential direction of the segmented body (4).

7. The connection separation apparatus according to claim 1, wherein One end of the connecting rod (2) inserted into the segmented body (4) is an expanding end with gradually increasing cross-sectional area, and correspondingly, the accommodating cavity in the segmented body (4) has a curved surface matched with the expanding end.

8. The connection separation apparatus according to claim 7, wherein The expanding end of the end of the connecting rod (2) is a central symmetric figure.

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