CN114985997A - Hot cutting device and flexible pressing and releasing device - Google Patents
Hot cutting device and flexible pressing and releasing device Download PDFInfo
- Publication number
- CN114985997A CN114985997A CN202210152497.3A CN202210152497A CN114985997A CN 114985997 A CN114985997 A CN 114985997A CN 202210152497 A CN202210152497 A CN 202210152497A CN 114985997 A CN114985997 A CN 114985997A
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- Prior art keywords
- tension cable
- thermal
- hot
- knife
- thermal cutting
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- 238000005520 cutting process Methods 0.000 title claims abstract description 48
- 238000003825 pressing Methods 0.000 title claims abstract description 23
- 238000007906 compression Methods 0.000 claims abstract description 26
- 230000006835 compression Effects 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000005485 electric heating Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000012212 insulator Substances 0.000 claims description 5
- 239000010445 mica Substances 0.000 claims description 4
- 229910052618 mica group Inorganic materials 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 239000002470 thermal conductor Substances 0.000 claims 3
- 238000009413 insulation Methods 0.000 claims 1
- 230000007246 mechanism Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 239000002360 explosive Substances 0.000 description 9
- 230000000977 initiatory effect Effects 0.000 description 7
- 239000004020 conductor Substances 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F3/00—Severing by means other than cutting; Apparatus therefor
- B26F3/06—Severing by using heat
- B26F3/08—Severing by using heat with heated members
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention relates to a hot cutting device and a flexible pressing and releasing device, wherein the hot cutting device comprises an electric connector, an outer sleeve, a spring, a moving block and a hot knife; the electric connector is electrically connected with the hot knife, a cavity is arranged in the outer sleeve and serves as a guide groove, two ends of the guide groove are plugged by a head fixed end and a tail fixed end, the moving block is slidably mounted in the guide groove, two ends of the spring are respectively connected with the tail fixed end and the moving block, the hot knife is mounted on the moving block and extends out of the head fixed end, and when the hot knife butts against a tension cable of the flexible compression release device, the spring is in a compression state. Compared with the prior art, the thermal knife is electrified in stability to increase the temperature of the thermal knife, so that the tension cable is fused; in order to ensure that the fusing speed is higher, two hot knives with mutually staggered positions are arranged at two sides of the tension cable, so that the device can realize that the impact on the posture of the spacecraft can be reduced while the tension cable is rapidly fused by the hot cutting device.
Description
Technical Field
The invention relates to the technical field of space, in particular to a thermal cutting device for a flexible pressing and releasing device and the flexible pressing and releasing device using the thermal cutting device.
Background
The spacecraft is provided with a plurality of devices needing on-orbit expansion, such as solar panels, large-scale expansion antennas and the like, the expandable devices are compressed on two sides of a spacecraft body when the spacecraft is launched, are unlocked and expanded when the spacecraft enters space and reaches a preset orbit, and the pressing force between components is required to be removed in the unlocking process, and the process is realized by cutting a pressing release mechanism. The compression release mechanisms currently available are mainly compression bar/flame cutter type and flexible compression release devices.
In the compressing rod/initiating explosive cutter type compressing and releasing mechanism, the compressing mechanism realizes the compressing effect through a slender compressing rod, the releasing mechanism is an initiating explosive cutter, and the working principle of the mechanism is that the pushing force generated by the explosion of an initiating explosive device is directly utilized to push a cutter in the cutter so that the cutter cuts off the compressing rod in a high-speed state. This kind compresses tightly release mechanism system simply, the preparation is comparatively simple and easy, but owing to adopted the priming system, the release process exists impact, safety when ground test to the spacecraft gesture is difficult to guarantee and make the test have once only improved test cost, also has the pollution to the space environment simultaneously, as follows: 1. in the process that the pressing rod is cut off at a high speed by the cutter, a large impact load is inevitably generated, and the posture of the spacecraft is influenced to a certain degree; 2. corrosive and polluting gases are generated in the process of firing the initiating explosive device, and although the leakage rate is reduced to the maximum extent by adopting a sealing technology, the possible pollution influence on the satellite environment and satellite-borne instruments and equipment caused by the spacecraft is reduced, the corrosive and polluting gases cannot be eliminated fundamentally; 3. the action of the explosive explosion test device directly utilizes the energy generated by explosive explosion, so that certain hidden danger exists on the safety of products and human bodies during ground test; 4. the initiating explosive device belongs to dangerous goods, and the ground storage condition is very strict, so that the inconvenience is brought to the ground storage and use; 5. because the release processes of the initiating explosive device and the pressing rod are irreversible, namely after one-time action, the pressing rod and the initiating explosive device can not be used again, so that the cost of a ground test is increased.
The flexible compression release mechanism adopts a tension cable and a hot knife, has small impact on the spacecraft, ensures the integral stability of the spacecraft in the release process, reduces the ground test cost, has no pollution to the environment, but does not invent a cutting device with good performance at present. Chinese patent CN103264775B discloses a flexible rope pressing device and its using method, but does not give the related structure of the thermal cutting device, and chinese patent CN211519901U discloses a novel flexible pressing releasing mechanism, mentions that the electric heating releasing element is installed on the base to cut the flexible rope, but the specific structure of the electric heating releasing element is not clear, and the overall stability when the flexible rope is fused is still to be improved.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned deficiencies of the prior art and providing a thermal cutting apparatus and a flexible compression release apparatus.
The purpose of the invention can be realized by the following technical scheme:
a hot cutting device is used for a flexible pressing and releasing device and comprises an electric connector, an outer sleeve, a spring, a moving block and a hot knife;
the electric connector is electrically connected with the hot knife, a cavity is arranged in the outer sleeve and serves as a guide groove, two ends of the guide groove are plugged by a head fixing end and a tail fixing end, the movable block is slidably mounted in the guide groove, two ends of the spring are respectively connected with the tail fixing end and the movable block, the hot knife is mounted on the movable block and extends out of the head fixing end, and when the hot knife abuts against a tension cable of the flexible compression releasing device, the spring is in a compression state.
Preferably, a seat body is arranged on the outer sleeve and used for installing the thermal cutting device on a base of the flexible compression release device.
Preferably, the head of the hot knife props against the tension cable, the tail of the hot knife is provided with a power supply connector, the power supply connector is connected with the positive electrode and the negative electrode of a power supply through an electric connector, the knife body is a heat conductor, an insulator and a heating body are distributed in the knife body, and the heating body is positioned at the head of the hot knife.
Preferably, the blade material of the hot knife is stainless steel.
Preferably, the insulator is made of mica material.
Preferably, the heating element is an electric heating wire.
Preferably, the electrical connector is mounted on a rear fixed end of the outer sleeve.
A flexible compression release device comprising: the device comprises a base, a tension cable, an installation piece, an adjusting screw and a thermal cutting device;
the lower end of the tension cable is connected with the base, the upper end of the tension cable is in threaded connection with the adjusting screw in a first spiral line direction to realize up-and-down movement, the adjusting screw is in threaded connection with the mounting piece in a second spiral line direction to realize up-and-down movement, and the first spiral line direction is opposite to the second spiral line direction; the hot cutting device is arranged on the base, and a hot knife of the hot cutting device is propped against the tension cable.
Preferably, the number of the hot cutting devices is 2, 2 hot cutting devices are installed on two sides of the tension cable in a staggered mode, and hot knife heads of the 2 hot cutting devices are aligned.
Preferably, install the buffering honeycomb in the base, the buffering honeycomb sets up the below at tension cable lower end.
Compared with the prior art, the invention has the following beneficial effects:
(1) the hot cutting device consists of an outer sleeve, a spring, a moving block and a hot knife, wherein the spring in a compression state provides thrust, the spring continuously pushes the hot knife to move forwards along with the hot knife gradually fusing a tension cable, the tension cable is fused by using a heat effect, and a compression mechanism is released, so that the impact load during release is reduced.
(2) The tension cable is prestressed by adopting a nonmetal tension cable, the temperature of the tension cable is raised by electrifying a pair of hot knives which are installed at two ends of the tension cable in a staggered mode, the tension cable is gradually fused by utilizing the heat effect, the pressing force between the components can be smoothly released, and finally the stable release can be realized.
(3) When the spacecraft reaches a preset orbit, the two hot knives are heated simultaneously, so that the hot cutting device can fuse the tension cable quickly, and the flexible pressing mechanism is released quickly.
(4) Install the buffering honeycomb in the base, can reduce the impact that causes the base when tension cable fuses to reduce the impact to the spacecraft gesture, guaranteed the holistic stability of release in-process spacecraft.
Drawings
FIG. 1 is a schematic structural view of a flexible compression release device;
FIG. 2 is a schematic structural view of a thermal cutting apparatus;
FIG. 3 is a schematic view of a hot knife;
reference numerals: 1. the device comprises a base, 2, a tension cable, 2-1, a lower end of the tension cable, 2-2, an upper end of the tension cable, 3, an adjusting screw, 3A, left-handed threads, 3B, right-handed threads, 4, an outer sleeve, 5, an electric connector, 6, a tail fixing end, 7, a head fixing end, 8, a moving block, 9, a spring, 10, a hot knife, 10-1, a power plug, 10-2, a heat conductor, 10-3, an insulator, 10-4, a heating body, 11, a base body, 12, a buffer honeycomb, 13, a base plate, 14, a connecting frame, 15 and a pressing bush.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
In the drawings, elements that are structurally identical are represented by like reference numerals, and elements that are structurally or functionally similar in each instance are represented by like reference numerals. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. Parts are exaggerated in the drawing where appropriate for clarity of illustration.
Example 1:
a flexible compression release apparatus, as shown in fig. 1, comprising: the device comprises a base 1, a tension cable 2, a mounting piece, an adjusting screw 3 and a thermal cutting device;
the lower end 2-1 of the tension cable is connected with the base 1, the upper end 2-2 of the tension cable is in threaded connection with the adjusting screw 3 through a first spiral line direction to realize up-and-down movement, the adjusting screw 3 is in threaded connection with the mounting piece through a second spiral line direction to realize up-and-down movement, the first spiral line direction is opposite to the second spiral line direction, in the embodiment, the first spiral line direction thread is a left-handed thread 3A, the second spiral line direction is a right-handed thread, and the compression process of the flexible compression releasing device is realized by screwing the adjusting screw 3 along the left-and-right threads to apply compression force on the tension cable 2; the mounting piece is used for connecting components to be unfolded, such as a solar panel, an antenna and the like; the thermal cutting device is arranged on the base 1, and a thermal knife 10 of the thermal cutting device is propped against the tension cable 2; the base plate 13 and the connection frame 14 on both sides function as a fixing means, and a pressing bush 15 for maintaining a seal and reducing wear between components is installed at a position spaced apart by a certain height.
As shown in fig. 2 to 3, the thermal cutting device is used for a flexible compression release device, and comprises an electric connector 5, an outer sleeve 4, a spring 9, a moving block 8 and a hot knife 10;
wherein, the electric connector 5 is electrically connected with the hot knife 10 to provide a working power supply; a cavity is arranged in the outer sleeve 4 and serves as a guide groove, two ends of the guide groove are blocked by a head fixing end 7 and a tail fixing end 6, and the outer sleeve 4 plays a role in supporting and protecting; the movable block 8 is slidably mounted in the guide groove, two ends of the spring 9 are respectively connected with the tail fixing end 6 and the movable block 8, the hot knife 10 is mounted on the movable block 8 and extends out of the head fixing end 7, and when the hot knife 10 abuts against the tension cable 2 of the flexible pressing and releasing device, the spring 9 is in a pressing state.
When the spacecraft reaches a preset orbit, the release is started, in the release process, the electric connector 5 is firstly electrified to conduct the whole circuit, the hot knife 10 continuously converts electric energy into heat energy, the temperature is continuously increased, the tension cable 2 is gradually fused, and the spring 9 in a pressing state continuously pushes the moving block 8 along with the fusion of the hot knife 10 on the tension cable 2 to drive the hot knife 10 to move forwards to abut against and continuously fuse the tension cable 2.
As shown in figure 1, the number of the thermal cutting devices in the flexible compression release device is 2, the 2 thermal cutting devices are installed on two sides of the tension cable 2 in a staggered mode, and the cutter heads of the thermal knives 10 of the 2 thermal cutting devices are aligned to abut against the same height of the tension cable 2, so that the fusing speed is higher. The spring 9 in the two thermal cutting devices continuously pushes the thermal knife 10 to fuse forwards, and the tension cable 2 can be rapidly fused, so that the flexible pressing mechanism is stably released.
As shown in fig. 2, the outer sleeve 4 is provided with a seat 11, and the thermal cutting device can be stably fixed on the base 1 of the flexible compression releasing device through the seat 11. An electrical connector 5 is mounted on the rear fixed end 6 of the outer sleeve 4.
Since the tension cable 2 is rapidly fused and may have some impact on the base 1, the base 1 is provided with a buffer honeycomb 12 for reducing impact, and the buffer honeycomb 12 is disposed below the lower end 2-1 of the tension cable.
As shown in figure 3, the head of the hot knife 10 is abutted against the tension cable 2, the tail of the hot knife is provided with a power supply connector 10-1 which is connected with the positive and negative electrodes of a power supply through an electric connector 5, the knife body is a heat conductor 10-2 made of stainless steel, an insulator 10-3 made of mica material and a heating element 10-4 serving as an electric heating wire are distributed in the knife body, and the heating element 10-4 is positioned at the head of the hot knife 10. After power is applied, the mica material can separate the power connector 10-1 from the heat conductor 10-2 to prevent electric conduction, and the electric heating wire converts electric energy into heat energy and transmits the heat energy to the cutter head to fuse the tension cable 2.
The invention provides a thermal cutting device and a flexible pressing and releasing device, aiming at ensuring the overall stability and quickly releasing an unfolding mechanism, wherein a thermal knife 10 is electrified in the aspect of stability to increase the temperature of the thermal knife, so that a tension cable 2 is fused; in order to make the fusing speed faster, two hot knives 10 are installed at both sides of the tension cable 2 and are staggered from each other. Therefore, the device can reduce the impact on the posture of the spacecraft while the thermal cutting device rapidly fuses the tension cable 2.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A hot cutting device is characterized in that the hot cutting device is used for a flexible pressing and releasing device and comprises an electric connector, an outer sleeve, a spring, a moving block and a hot knife;
the electric connector is electrically connected with the hot knife, a cavity is arranged in the outer sleeve and serves as a guide groove, two ends of the guide groove are plugged by a head fixing end and a tail fixing end, the movable block is slidably mounted in the guide groove, two ends of the spring are respectively connected with the tail fixing end and the movable block, the hot knife is mounted on the movable block and extends out of the head fixing end, and when the hot knife abuts against a tension cable of the flexible compression releasing device, the spring is in a compression state.
2. A thermal cutting apparatus according to claim 1, wherein said outer sleeve is provided with a seat for mounting the thermal cutting apparatus on a base of the flexible compression release means.
3. The thermal cutting apparatus as claimed in claim 1, wherein the head of the thermal knife is against the tension cable, the tail is provided with a power connector connected to the positive and negative electrodes of the power source through an electrical connector, the thermal conductor is disposed inside the thermal conductor, and the insulator and the heating element are disposed inside the thermal conductor and located at the head of the thermal knife.
4. A thermal cutting apparatus according to claim 3, wherein the blade material of said hot knife is stainless steel.
5. A thermal cutting apparatus according to claim 3, wherein said insulation is made of mica material.
6. A thermal cutting apparatus according to claim 3, wherein said heat generating body is an electric heating wire.
7. A thermal cutting apparatus according to claim 1, wherein said electrical connector is mounted on the tail-fixed end of the outer sleeve.
8. A flexible compression release device, comprising: the device comprises a base, a tension cable, an installation piece, an adjusting screw and a thermal cutting device;
the lower end of the tension cable is connected with the base, the upper end of the tension cable is in threaded connection with the adjusting screw in a first spiral line direction to realize up-and-down movement, the adjusting screw is in threaded connection with the mounting piece in a second spiral line direction to realize up-and-down movement, and the first spiral line direction is opposite to the second spiral line direction; the thermal cutting device is as claimed in any one of claims 1 to 7, and is mounted on a base, and a thermal blade of the thermal cutting device is pressed against the tension cable.
9. The apparatus of claim 8, wherein the number of the thermal cutting means is 2, 2 thermal cutting means are installed on both sides of the tension cable in a staggered manner, and the thermal knife heads of the 2 thermal cutting means are aligned.
10. The flexible compression release device of claim 8, wherein the base has a buffer cell mounted therein, the buffer cell being disposed below a lower end of the tension cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210152497.3A CN114985997A (en) | 2022-02-18 | 2022-02-18 | Hot cutting device and flexible pressing and releasing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210152497.3A CN114985997A (en) | 2022-02-18 | 2022-02-18 | Hot cutting device and flexible pressing and releasing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114985997A true CN114985997A (en) | 2022-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210152497.3A Pending CN114985997A (en) | 2022-02-18 | 2022-02-18 | Hot cutting device and flexible pressing and releasing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114985997A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105711861A (en) * | 2016-03-29 | 2016-06-29 | 上海卫星工程研究所 | Single-point flexible hold-down and release device for spacecraft |
| CN105864360A (en) * | 2016-03-30 | 2016-08-17 | 上海卫星工程研究所 | Tensional cable assembly applied to flexible pressing and releasing device of spacecraft |
| CN106584599A (en) * | 2016-12-06 | 2017-04-26 | 山东航天电子技术研究所 | Thermal cutting type cable separating device |
| CN109625328A (en) * | 2018-12-12 | 2019-04-16 | 上海卫星装备研究所 | Fuse Type compresses release device |
| CN212243889U (en) * | 2020-05-18 | 2020-12-29 | 苏州馥昶空间技术有限公司 | Compressing and releasing mechanism |
| CN113071719A (en) * | 2021-04-30 | 2021-07-06 | 北京吾天科技有限公司 | Double-hot-cutter type compression and release mechanism |
| CN113104239A (en) * | 2021-04-23 | 2021-07-13 | 中国科学院微小卫星创新研究院 | Thermal cutting unlocking device and installation unlocking method |
| CN214443827U (en) * | 2021-03-24 | 2021-10-22 | 格力大松（宿迁）生活电器有限公司 | Fixed pressing device and laser cutting equipment |
-
2022
- 2022-02-18 CN CN202210152497.3A patent/CN114985997A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105711861A (en) * | 2016-03-29 | 2016-06-29 | 上海卫星工程研究所 | Single-point flexible hold-down and release device for spacecraft |
| CN105864360A (en) * | 2016-03-30 | 2016-08-17 | 上海卫星工程研究所 | Tensional cable assembly applied to flexible pressing and releasing device of spacecraft |
| CN106584599A (en) * | 2016-12-06 | 2017-04-26 | 山东航天电子技术研究所 | Thermal cutting type cable separating device |
| CN109625328A (en) * | 2018-12-12 | 2019-04-16 | 上海卫星装备研究所 | Fuse Type compresses release device |
| CN212243889U (en) * | 2020-05-18 | 2020-12-29 | 苏州馥昶空间技术有限公司 | Compressing and releasing mechanism |
| CN214443827U (en) * | 2021-03-24 | 2021-10-22 | 格力大松（宿迁）生活电器有限公司 | Fixed pressing device and laser cutting equipment |
| CN113104239A (en) * | 2021-04-23 | 2021-07-13 | 中国科学院微小卫星创新研究院 | Thermal cutting unlocking device and installation unlocking method |
| CN113071719A (en) * | 2021-04-30 | 2021-07-06 | 北京吾天科技有限公司 | Double-hot-cutter type compression and release mechanism |
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