Protection device and transmitting system
By installing a protective device between the launcher and the projectile, and using parachute components and elastic elements to reduce the descent speed, the problem of damage to the projectile caused by the high temperature and high pressure gas in the gunpowder-powered launcher was solved, and the stable and safe launch of the projectile was achieved.
Patent Information
- Application Number
- CN202520674155.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-04-11
AI Technical Summary
In existing technologies, the high-temperature and high-pressure gases and sparks generated during the launch process of gunpowder-powered launchers may damage the launch material, affecting its performance and reliability.
A protective device is designed, including a first outer shell, a parachute assembly, and a locking assembly. By blocking direct contact between the launcher and the projectile, the parachute assembly and elastic elements reduce the descent speed, ensuring that the projectile is stably launched in a preset attitude.
This effectively avoids damage to the launch material during launch, ensuring launch stability and safety, and reducing the risk of damage to the launch material.
Smart Images
Figure CN223910149U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to launcher technical field, concretely relates to a protection device and launch system. BACKGROUND
[0002] In prior art, most launchers use powder power launcher to eject the launch object, the powder power launcher pushes the launch object out of the warehouse by high pressure gas generated by powder combustion, however, the high temperature and high pressure gas and spark generated in the process of powder combustion may damage the launch object, affecting its performance and reliability. SUMMARY
[0003] The main purpose of the utility model is to overcome the shortcomings and deficiencies of prior art, provide a protection device and launch system, aim at solving the problems in prior art.
[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0005] Firstly, the utility model provides a protection device, for being arranged between the launcher and the launch object filled in the launch barrel, the protection device includes the first shell, the outer side of the first shell is provided with the positioning groove, the positioning groove is used for placing the launch object.
[0006] Further, the first shell includes the first casing and the second casing, the protection device further includes the parachute assembly and the locking assembly, the first casing and the second casing are connected in a separable mode through the locking assembly, the parachute assembly is located in the mounting cavity formed by the first casing and the second casing, and the parachute assembly is connected with the first casing and / or the second casing.
[0007] Further, the protection device further includes the first elastic member, the first elastic member is compressed in the mounting cavity, and is used for providing elastic force for the mutual separation of the first casing and the second casing.
[0008] Further, the first elastic member is provided with an elastic sheath.
[0009] Further, the two ends of the first elastic member are respectively provided with the first sleeve and the second sleeve, the first sleeve is fixedly connected with the first casing, and the second sleeve is abutted with the second casing, and the first elastic member is compressed in the protection cavity formed by the first sleeve and the second sleeve.
[0010] Further, the parachute assembly includes the umbrella body and a plurality of umbrella ropes, the umbrella body is connected with the second casing, and the plurality of umbrella ropes are connected with the umbrella body and the first casing.
[0011] Further, the second shell is arranged inside the first shell.
[0012] The first shell is provided with a first through hole, the locking assembly comprises a locking member and a second elastic member, the locking member passes through the first through hole, and the part of the locking member that penetrates into the inside of the first shell abuts against the second shell, so that the second shell is limited in the direction of being separated from the first shell; the second elastic member is used for providing elastic force for the locking member to penetrate out of the first through hole to the outside of the first shell.
[0013] Further, the protection device further comprises a second shell, the second shell is detachably mounted outside the first shell, and the inside of the second shell abuts against the part of the locking member that penetrates out of the first shell, so that the movement of the locking member penetrating out of the first through hole to the outside of the first shell is limited.
[0014] Further, the second shell and the first shell are connected through bolts.
[0015] In a second aspect, the utility model provides a kind of launch system, including launch tube, transmitter, launch and the protection device of first aspect described, transmitter, protection device, launch in the launch tube are sequentially arranged along launch direction;
[0016] The part of the locking member that penetrates out of the first shell abuts against the inner wall of the launch tube, so that the movement of the locking member penetrating out of the first through hole to the outside of the first shell is limited.
[0017] Compared with prior art, the protection device of the utility model has the following advantages and beneficial effects: by being arranged between the transmitter and the launch in the launch tube, the protection device bears the high-temperature and high-pressure gas and spark generated when the transmitter acts, and drives the launch to be shot out from the launch tube in a preset posture through the positioning groove, effectively avoids the damage of the transmitter to the launch, and ensures the launch stability when the launch is shot out from the launch tube. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments of the utility model.
[0019] Figure 1 is the three-dimensional structure schematic diagram of the protection device of the embodiments of the utility model;
[0020] Figure 2 is the first sectional view of the protection device of the embodiments of the utility model;
[0021] Figure 3is a structure schematic view of the protection device in the first state of the locking assembly of the embodiment of the utility model;
[0022] Figure 4 is a structure schematic view of the protection device in the second state of the locking assembly of the embodiment of the utility model;
[0023] Figure 5 is a sectional structure schematic view of the protection device in the first state of the locking assembly of the embodiment of the utility model;
[0024] Figure 6 is a sectional structure schematic view of the protection device in the second state of the locking assembly of the embodiment of the utility model;
[0025] Figure 7 is a cooperation structure schematic view of the first elastic piece of the protection device of the embodiment of the utility model;
[0026] Figure 8 is a cooperation sectional view of the first elastic piece of the protection device of the embodiment of the utility model;
[0027] Figure 9 is a structure schematic view of the second shell of the protection device of the embodiment of the utility model;
[0028] Figure 10 is a structure schematic view of the protection device of the embodiment of the utility model with the second shell;
[0029] Figure 11 is a first sectional view of the protection device of the embodiment of the utility model with the second shell;
[0030] Figure 12 is a second sectional view of the protection device of the embodiment of the utility model with the second shell;
[0031] Figure 13 is a structure schematic view of the protection device of the embodiment of the utility model with the first shell and the second shell separated.
[0032] Mark explanation:
[0033] 10, protection device; 11, first shell; 111, first shell; 1111, first through hole; 112, second shell; 1121, second through hole; 113, positioning groove; 12, parachute assembly; 121, umbrella body; 122, umbrella rope; 13, locking assembly; 131, locking piece; 132, second elastic piece; 14, first elastic piece; 141, elastic sheath; 142, first sleeve; 143, second sleeve; 15, second shell. Specific implementation
[0034] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the utility model will be further described in detail below in combination with the drawings and specific embodiments.
[0035] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0036] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or positional relationship described based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0037] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0038] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be connected, or detachable, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0039] In the utility model, unless otherwise expressly provided and limited, the first feature is "on" or "under" the second feature, which can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0040] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0041] Please refer to Figures 1 to 9 And Figure 13 The utility model discloses an embodiment provides a protection device 10, including for filling between launcher and projectile in launcher, protection device 10 includes first shell 11, and the outer side of first shell 11 is provided with positioning groove 113, and positioning groove 113 is used for placing projectile. It needs to explain that when projectile is placed in positioning groove 113, positioning groove 113 only plays the limiting action to projectile, guarantees that projectile is in preset attitude in positioning groove 113, but will not make projectile and first shell 11 relative fixed, so that protection device 10 in this embodiment can smoothly separate with the projectile that protection device 10 is shot out launcher along with projectile.
[0042] It can be understood that the protection device 10 in the embodiment is designed to block the direct contact between the launcher and the projectile, to protect the projectile from high-temperature and high-pressure gas and sparks, and to ensure that the projectile can be stably launched in a preset attitude. Specifically, the protection device 10 is arranged between the launcher and the projectile, and the first shell 11 thereof bears the impact of high-temperature and high-pressure gas and sparks generated by the launcher; the positioning groove 113 ensures that the projectile maintains a preset attitude during launching, and is not fixed with the protection device 10 so as to be separated smoothly after launching; thus, the protection device 10 of the embodiment not only avoids damage to the projectile, but also ensures the attitude stability of the projectile during launching.
[0043] In some embodiments, the first shell 11 comprises a first shell body 111 and a second shell body 112, the protection device 10 further comprises a parachute assembly 12 and a locking assembly 13; the first shell body 111 and the second shell body 112 are separably connected by the locking assembly 13; the parachute assembly 12 is located in a mounting cavity enclosed by the first shell body 111 and the second shell body 112, and the parachute assembly 12 is connected with the first shell body 111 and / or the second shell body 112. Optionally, the first shell body 111 and the second shell body 112 are butted in the launching direction. Optionally, the first shell body 111 is located on the side of the second shell body 112 facing the launching direction, and a positioning groove 113 is arranged on the first shell body 111. Preferably, the parachute assembly 12 is connected to at least the first shell body 111, and in the present embodiment, the parachute assembly 12 is connected to the first shell body 111 and the second shell body 112, and the inflation surface of the parachute assembly 12 faces the first shell body 111.
[0044] It should be explained that the connection state of the first shell body 111 and the second shell body 112 can be further changed by changing the state of the locking assembly 13. In the initial state, the first shell body 111 and the second shell body 112 are connected by the locking assembly 13, at this time the locking assembly 13 is connected with the first shell body 111 and the second shell body 112, thereby forming the relative fixed position relationship of the first shell body 111 and the second shell body 112. In the unlocked state, the locking assembly 13 is disconnected with the first shell body 111 and / or the second shell body 112, thereby disconnecting the relative position relationship of the first shell body 111 and the second shell body 112 defined by the locking assembly 13, and then the first shell body 111 and the second shell body 112 can be relatively separated, so that the parachute assembly 12 folded in the mounting cavity is released and unfolded. The release and unfolding of the parachute assembly 12 can reduce the movement speed of the first shell body 111 and the second shell body 112, so that the launched object is separated from the positioning groove 113; and the release and unfolding of the parachute assembly 12 can also slow down the descent speed of the protection device 10, thereby ensuring the safety of the ground.
[0045] In some embodiments, the protection device 10 further comprises a first elastic member 14, which is compressed in the mounting cavity and used to provide elastic force for the mutual separation of the first shell body 111 and the second shell body 112. It can be understood that when the first shell body 111 and the second shell body 112 are connected by the locking assembly 13, the first elastic member 14 is compressed in the mounting cavity to store energy; when the locking assembly 13 is disconnected with the first shell body 111 and / or the second shell body 112, so that the relative position relationship of the first shell body 111 and the second shell body 112 defined by the locking assembly 13 is disconnected, the stored elastic potential energy of the first elastic member 14 will make the first shell body 111 and the second shell body 112 be separated, so as to quickly release and unfold the parachute assembly 12, reduce the movement speed of the protection device 10, and at the same time promote the launched object to be separated from the positioning groove 113.
[0046] In some embodiments, the parachute assembly 12 comprises a parachute body 121 connected to the second housing 112 and a plurality of parachute ropes 122 connected to the parachute body 121 and the first housing 111. Thus, when the protective device 10 is launched and the locking mechanism is unlocked, the first housing 111 separates from the second housing 112, and since the first housing 111 is located on the side of the second housing 112 facing the launch direction, the inflation surface of the parachute assembly 12 faces the first housing 111. In the case that the parachute ropes 122 are pulled by the first housing 111 and the parachute body 121 is pulled by the second housing 112, the airflow from the direction of the first housing 111 will cause the parachute body 121 to rapidly deploy.
[0047] In a feasible implementation, the operation process of the protective device 10 can be divided into three stages. The first stage is the loading stage, in which the first housing 111 and the second housing 112 of the protective device 10 are connected by the locking assembly 13 to form an integral whole; the first elastic member 14 is compressed in the installation cavity to accumulate elastic potential energy; and the projectile is placed in the positioning groove 113 of the first housing 111, which only serves to limit the projectile and does not fix the projectile. The second stage is the launching stage, in which the force generated by the launcher pushes the protective device 10 and the projectile to be launched together, and during the launching process, the locking assembly 13 keeps the first housing 111 and the second housing 112 relatively fixed to ensure the stability of the overall structure. The third stage is the separation and parachute deployment stage, in which, after the protective device 10 and the projectile are launched, the state of the locking assembly 13 is changed by an external triggering mechanism (such as centrifugal force, spring force or electronic control) to be unlocked; after the locking assembly 13 is unlocked, the elastic potential energy of the first elastic member 14 is released to push the first housing 111 and the second housing 112 to rapidly separate; the parachute ropes 122 are pulled by the first housing 111, and the parachute body 121 is pulled by the second housing 112, and the airflow from the direction of the first housing 111 inflates the parachute body 121 to push the parachute body 121 to rapidly deploy; after the parachute assembly 12 is deployed, the movement speed of the first housing 111 and the second housing 112 is reduced to cause the projectile to be separated from the positioning groove 113, and the parachute assembly 12 continues to slow down the descent speed of the protective device 10 to ensure safety on the ground.
[0048] In some embodiments, the first elastic member 14 is provided with an elastic sheath 141. Optionally, the first elastic member 14 is a spring, which may be entangled with the parachute body 121 or the parachute ropes 122 of the parachute assembly 12 during the elastic deformation of the first elastic member 14. The provision of the elastic sheath 141 can effectively prevent the entanglement of the parachute assembly 12 and the first elastic member 14 during the installation process and the launching process, and avoid the situation that the release and deployment of the parachute assembly 12 are blocked.
[0049] In some embodiments, the two ends of the first elastic member 14 are respectively sleeved with a first sleeve 142 and a second sleeve 143, the first sleeve 142 is fixedly connected with the first shell 111, the second sleeve 143 is in abutment with the second shell 112, and the first elastic member 14 is compressed in a protection cavity formed by the first sleeve 142 and the second sleeve 143. In some embodiments, the first elastic member 14 and the elastic sleeve 141 are both located in the protection cavity formed by the first sleeve 142 and the second sleeve 143. In some embodiments, the first elastic member 14 and the first sleeve 142 and the second sleeve 143 are all sleeved in the elastic sleeve 141. It can be understood that the first elastic member 14 may be disturbed by external factors during compression and release, resulting in unstable performance. In order to improve the reliability and stability of the device, the first sleeve 142 and the second sleeve 143 are provided in the application to form a protection cavity, which is designed to further protect the first elastic member 14 and the elastic sleeve 141.
[0050] In some embodiments, the second shell 112 is arranged inside the first shell 111; the first shell 111 is provided with a first through hole 1111, the locking assembly 13 comprises a locking member 131 and a second elastic member 132, the locking member 131 passes through the first through hole 1111, and the part of the locking member 131 that penetrates into the inside of the first shell 111 is in abutment with the second shell 112, so that the second shell 112 is limited in the direction of being separated from the first shell 111; the second elastic member 132 is used to provide the locking member 131 with elastic force to pass out of the first through hole 1111 to the outside of the first shell 111.
[0051] Optionally, the part of the locking member 131 that penetrates into the inside of the first shell 111 is located in the path of the second shell 112 being separated from the first shell 111, so that the second shell 112 is limited in the direction of being separated from the first shell 111.
[0052] Optionally, the second shell 112 is provided with a second through hole 1121, and the locking member 131 passes through the first through hole 1111 and the second through hole 1121, so that the second shell 112 is relatively fixed with the first shell 111.
[0053] Optionally, the second elastic member 132 is arranged in the first through hole 1111, and the locking member 131 is provided with an abutment portion for extruding the second elastic member 132, so that when the locking member 131 moves in the first through hole 1111, the abutment portion can extrude or release the second elastic member 132.
[0054] In a feasible implementation, the action process of the protection device 10 can be divided into the following three stages. The first stage is the loading stage, in which the second shell 112 is arranged inside the first shell 111, the locking member 131 passes through the first through hole 1111 of the first shell 111 and protrudes inside the first shell 111 to abut against the second shell 112, so that the second shell 112 is limited in the direction of being separated from the first shell 111, and the second elastic member 132 is arranged in the first through hole 1111. The abutting portion on the locking member 131 extrudes the second elastic member 132, so that the locking member 131 has a force to pass out of the first through hole 1111 to the outside of the first shell 111, but the part of the locking member 131 passing out of the first through hole 1111 to the outside of the first shell 111 is extruded by an external force or an external structure, so that the locking member 131 cannot move to the outside of the first through hole 1111. The second stage is the launching stage, in which the locking member 131 keeps abutting against the second shell 112 to ensure the relative fixation of the first shell 111 and the second shell 112, so as to guarantee the stability and accuracy of launching. The third stage is the separation and unfolding stage, in which, after the protection device 10 is launched, the locking member 131 moves to the outside of the first through hole 1111 under the action of the elastic force of the second elastic member 132, so that the second shell 112 is no longer limited, and the first elastic member 14 releases the elastic potential energy to push the first shell 111 and the second shell 112 to separate; the parachute assembly 12 is unfolded under the action of the airflow to reduce the descending speed of the protection device 10 and promote the launching object to be separated from the positioning groove 113.
[0055] Please refer to Figures 10 to 13 In some embodiments, the locking state of the locking assembly 13 to the first shell 111 and the second shell 112 needs to be kept before the protection device 10 is loaded into the launching barrel, and the protection device 10 in the embodiment further comprises a second shell 15, which is detachably arranged outside the first shell 11 and abuts against the part of the locking member 131 passing out of the first shell 111 to the outside, so that the movement of the locking member 131 passing out of the first through hole 1111 to the outside of the first shell 111 is limited, and the connection relationship between the first shell 111 and the second shell 112 is locked by the locking assembly 13. When the protection device 10 in the embodiment needs to be loaded into the launching barrel, the second shell 15 is only needed to be detached from the first shell 11, and the locking member 131 is pressed into the launching barrel by an external force. By introducing the second shell 15, the protection device 10 can keep the locking state before being loaded into the launching barrel, so as to ensure the stability and reliability of the connection between the first shell 111 and the second shell 112, and simplify the loading operation and improve the performance and safety of the overall system.
[0056] In some embodiments, the second shell 15 is connected to the first shell 11 by bolts.
[0057] The utility model provides a kind of launch system, including launch tube, transmitter, projectile and the above-mentioned protective device 10, transmitter, protective device 10, projectile are sequentially arranged in launch tube along the direction of emission;The part of locking piece 131 that passes out first shell body 111 outside abuts to launch tube inner wall, to make the movement of locking piece 131 that passes out first through-hole 1111 to first shell body 111 outside be limited.
[0058] It can be understood that the part of locking piece 131 that passes out first shell body 111 outside abuts to launch tube inner wall, limits the movement of locking piece 131, ensures locking state.In the process of launching, locking piece 131 keeps abutting to launch tube inner wall, ensures the stability of protective device 10 in launch tube.When protective device 10 is shot, the abutting of locking piece 131 and launch tube inner wall is released, locking piece 131 is released from the abutting position with second shell body 112, releases the limitation to second shell body 112, so that first shell body 111 and second shell body 112 can be separated.
[0059] Specifically, in the loading phase, protective device 10 is loaded into launch tube, the part of locking piece 131 that passes out first shell body 111 outside abuts to launch tube inner wall, limits the movement of locking piece 131.In the launching phase, transmitter generates power, pushes protective device 10 and projectile to move along launch tube, locking piece 131 keeps abutting to launch tube inner wall, ensures the stability of protective device 10 in launch tube.In the separation and deployment phase, when protective device 10 is shot, the abutting of locking piece 131 and launch tube inner wall is released, locking piece 131 is released from the abutting position with second shell body 112, releases the limitation to second shell body 112, first elastic member 14 releases elastic potential energy, pushes first shell body 111 and second shell body 112 to separate, parachute assembly 12 is deployed under the action of airflow, reduces the descent speed of protective device 10, makes projectile separate from positioning groove 113.
[0060] The above embodiment is the preferred embodiment of the utility model, but the embodiment of the utility model is not limited by the above embodiment, any change, modification, replacement, combination, simplification made without departing from the spirit and principle of the utility model should be regarded as equivalent replacement mode, all are included in the protection scope of the utility model.
Claims
1. A protection device, characterized in that The protection device comprises a first shell, and an outer side of the first shell is provided with a positioning groove for placing the projectile.
2. The protection device according to claim 1, characterized in that The first shell comprises a first casing and a second casing, and the protection device further comprises a parachute assembly and a locking assembly; the first casing and the second casing are detachably connected through the locking assembly; the parachute assembly is located in an installation cavity enclosed by the first casing and the second casing, and the parachute assembly is connected with the first casing and / or the second casing.
3. The protection device according to claim 2, characterized in that The protection device further comprises a first elastic member compressed in the installation cavity, which provides elastic force for separating the first casing and the second casing.
4. The protection device according to claim 3, characterized in that The first elastic member is sleeved with an elastic sheath.
5. The protection device of claim 3, wherein Two ends of the first elastic member are respectively sleeved with a first sleeve and a second sleeve, the first sleeve is fixedly connected with the first casing, and the second sleeve abuts against the second casing; the first elastic member is compressed in a protection cavity enclosed by the first sleeve and the second sleeve.
6. The protection device of claim 2, wherein The parachute assembly comprises a parachute body and a plurality of parachute ropes, the parachute body is connected with the second casing, and the plurality of parachute ropes are connected with the parachute body and the first casing.
7. The protection device of claim 2, wherein The second casing is arranged inside the first casing; The first casing is provided with a first through hole, the locking assembly comprises a locking member and a second elastic member, the locking member passes through the first through hole, and a portion of the locking member inserted into the first casing abuts against the second casing, so that the second casing is limited in the direction of separating from the first casing; the second elastic member is used for providing elastic force for the locking member to pass out of the first through hole to the outside of the first casing.
8. The protection device according to claim 7, characterized in that The protection device further comprises a second shell, which is detachably mounted on the outside of the first shell, and an inner side of the second shell abuts against the portion of the locking member passing out of the first casing, so that the movement of the locking member passing out of the first through hole to the outside of the first casing is limited.
9. The protection device according to claim 8, characterized in that The second shell is connected with the first shell through bolts.
10. A transmitting system characterized by, The protection device comprises a first shell, and an outer side of the first shell is provided with a positioning groove for placing the projectile. The first shell comprises a first casing and a second casing, and the protection device further comprises a parachute assembly and a locking assembly; the first casing and the second casing are detachably connected through the locking assembly; the parachute assembly is located in an installation cavity enclosed by the first casing and the second casing, and the parachute assembly is connected with the first casing and / or the second casing. The protection device further comprises a first elastic member compressed in the installation cavity, which provides elastic force for separating the first casing and the second casing. The first elastic member is sleeved with an elastic sheath. Two ends of the first elastic member are respectively sleeved with a first sleeve and a second sleeve, the first sleeve is fixedly connected with the first casing, and the second sleeve abuts against the second casing; the first elastic member is compressed in a protection cavity enclosed by the first sleeve and the second sleeve. The parachute assembly comprises a parachute body and a plurality of parachute ropes, the parachute body is connected with the second casing, and the plurality of parachute ropes are connected with the parachute body and the first casing. The second casing is arranged inside the first casing; The first casing is provided with a first through hole, the locking assembly comprises a locking member and a second elastic member, the locking member passes through the first through hole, and a portion of the locking member inserted into the first casing abuts against the second casing, so that the second casing is limited in the direction of separating from the first casing; the second elastic member is used for providing elastic force for the locking member to pass out of the first through hole to the outside of the first casing. The protection device further comprises a second shell, which is detachably mounted on the outside of the first shell, and an inner side of the second shell abuts against the portion of the locking member passing out of the first casing, so that the movement of the locking member passing out of the first through hole to the outside of the first casing is limited. The second shell is connected with the first shell through bolts. The protection device comprises a first shell, and an outer side of the first shell is provided with a positioning groove for placing the projectile. The first shell comprises a first casing and a second casing, and the protection device further comprises a parachute assembly and a locking assembly; the first casing and the second casing are detachably connected through the locking assembly; the parachute assembly is located in an installation cavity enclosed by the first casing and the second casing, and the parachute assembly is connected with the first casing and / or the second casing.