CN210116656U - Rocket and propellant storage tank thereof - Google Patents

Abstract

The utility model provides a rocket and propellant tank thereof, including first tank, second tank and sharing bottom of the case, first tank and second tank are connected through sharing bottom of the case, and share bottom of the case forms enclosed construction with the junction of first tank and second tank respectively. The utility model provides a rocket and propellant storage tank thereof has cancelled the series structure of case interlude, can effectively shorten the rocket body height, reduces carrier rocket's slenderness ratio, is favorable to increasing the stability of rocket, and rocket weight is lightest, and space utilization is the highest, and the carrying capacity is the biggest. And the standardized structure is adopted, so that the cost can be greatly reduced, the manufacturing period is shortened, and the reliability of the product is improved.

Description

Rocket and propellant storage tank thereof

Technical Field

The utility model relates to a technical field of carrier rocket processing, concretely relates to rocket and propellant storage tank thereof.

Background

The tanks of the conventional launch vehicle are generally in a series configuration, and as shown in fig. 1 and 2, the tanks include an oxidant tank 1, a combustion agent tank 2, and a tank section 3, and the oxidant tank 1 and the combustion agent tank 2 are connected by the tank section 3. The function of the oxidizer tank 1 and the combustion agent tank 2 is to store the propellant and to transmit the load of the rocket, and the tank section 3 is mainly to connect the oxidizer tank 1 and the combustion agent tank 2. The storage tank is of a closed structure, all parts are generally connected in a welding mode, the tank interval section 3 is a cylinder section with left and right opened, and the oxidant storage tank 1, the combustion agent storage tank 2 and the tank interval section 3 are connected through butt bolts. This structure has the following disadvantages:

(1) the serial storage box structure increases the height and slenderness ratio of the rocket, namely the total height and diameter ratio of the rocket, and is not beneficial to the stability of rocket body flight.

(2) The traditional storage box structure mostly adopts a tailor welding or splicing mode, the number of parts is as high as more than one hundred, the working procedures are complicated, the manufacturing period is long, the total cost is high, and occasionally, more welding seams are formed;

(3) because the products are various in types and low in generalization degree, the flexibility of a tool die for assembling each customized part is poor, the range of adaptive structure parameters is very narrow, and the requirement of low-cost and rapid manufacturing of commercial aerospace is difficult to meet.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rocket and propellant storage tank thereof to the storage tank structure who solves among the prior art has that the assembly degree of difficulty is big, the not high and height and the great technical problem of slenderness ratio of universalization degree.

In order to achieve the above object, the utility model adopts the following technical scheme: there is provided a propellant tank comprising: the device comprises a first storage tank, a second storage tank and a shared tank bottom, wherein the first storage tank is connected with the second storage tank; the shared box bottom is fixedly connected between the first storage box and the second storage box, and a closed structure is formed at the joint of the shared box bottom and the first storage box and the joint of the shared box bottom and the second storage box respectively.

Further, the first storage tank comprises a first cylinder section, a first tank bottom and a second tank bottom, and the first tank bottom and the second tank bottom are respectively positioned at two opposite ends of the first cylinder section; the second storage box comprises a second cylinder section and a third box bottom, the second box bottom and the third box bottom are respectively positioned at two opposite ends of the second cylinder section, and the second box bottom is the common box bottom.

Furthermore, the first box bottom and the second box bottom are respectively and fixedly connected with the first cylinder section, and the second box bottom and the third box bottom are respectively and fixedly connected with the second cylinder section.

Furthermore, the first box bottom, the second box bottom and the third box bottom are all made of bottom pieces, each bottom piece comprises a circular ring and a top cover fixed on the circular ring, and a plurality of connecting holes are formed in the top cover.

Further, the circular ring is made by a single plate body through the processing modes of spinning, liquid-filling forming or explosion forming.

Furthermore, the opposite two ends of the circular ring are respectively a first end part and a second end part, the diameter of the first end part is smaller than that of the second end part, and the top cover is fixed on the first end part.

Furthermore, the first end portion is provided with a blind hole, the top cover is provided with a first through hole, and the fixing piece penetrates through the first through hole and the blind hole and is fixedly connected with the blind hole.

Further, a sealing ring is arranged at the joint of the top cover and the first end part.

Further, the first barrel section and the second barrel section are both formed by single plate body roll welding.

Furthermore, two ends of the first cylinder section are respectively welded with the first box bottom and the second box bottom, and one end of the second cylinder section is welded with the third box bottom.

Further, the outer side of the second box bottom is provided with a fixed table, and the second cylinder section is welded with the fixed table.

Furthermore, the device also comprises a conveying pipe, one end of the conveying pipe is fixed at the second tank bottom and communicated with the first storage tank, and the conveying pipe penetrates through the second cylinder section and the third tank bottom and is communicated to the outside.

Further, the conveying pipe comprises a pipe body, a tunnel pipe sleeved outside the pipe body and a heat insulation piece arranged between the tunnel pipe and the pipe body.

Furthermore, the two opposite ends of the conveying pipe are also provided with butt flanges which are respectively connected with the second box bottom and the third box bottom.

Further, the outer surface of the tunnel tube is provided with several reinforcing ribs.

Further, the box body further comprises a short barrel part, and the short barrel part is arranged between the second barrel section and the third box bottom.

Further, the short barrel is formed by roll welding a single plate body.

The present invention also provides a rocket including a propellant tank as in any above, the first tank being adapted to contain an oxidizer and the second tank being adapted to contain a combustion agent.

The utility model provides a rocket and propellant storage tank's beneficial effect lies in: compared with the prior art, the utility model discloses rocket and propellant tank thereof has cancelled the series connection structure between the case section, directly is connected first tank and second tank through the sharing bottom of the case, can effectively shorten the rocket body height, reduces the slenderness ratio of carrier rocket, is favorable to increasing the stability of rocket to can be under the same condition of assurance propellant charge, rocket weight is lightest, and space utilization is the highest, and the carrying capacity is the biggest. And the standardized cylinder section structure and the standardized box bottom structure are adopted, so that the cost can be greatly reduced, the manufacturing period is shortened, and the reliability of the product is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a tank of a conventional launch vehicle of the prior art;

FIG. 2 is a schematic side view of a tank of a conventional launch vehicle of the prior art;

fig. 3 is a schematic perspective view of a propellant tank according to an embodiment of the present invention;

FIG. 4 is a schematic view in half section of the propellant tank of FIG. 3;

fig. 5 is a schematic structural diagram of a propellant tank according to an embodiment of the present invention;

fig. 6 is a schematic front view of a bottom case according to an embodiment of the present invention;

FIG. 7 is a schematic top view of the base member of FIG. 6;

FIG. 8 is a partial half cross-sectional view of the ring of the tank bottom member shown in FIG. 6;

fig. 9 is a schematic view of a welding structure of the second tank bottom and the first cylinder section and the second cylinder section of the propellant tank according to the embodiment of the present invention;

fig. 10 is a schematic perspective view of a truss frame reinforcing structure according to an embodiment of the present invention;

fig. 11 is a schematic perspective view of a conveying pipe according to an embodiment of the present invention.

Description of reference numerals:

1-an oxidant storage tank; 2-a combustion agent storage tank; 3-a box interval section; 4-a first tank; 5-a second tank; 6-conveying pipe; 7-a bottom case; 8-short cylinder; 9-truss frame reinforcement structure; 41-a first barrel section; 42-the first tank bottom; 43-a second tank bottom; 431-a stationary table; 51-a second barrel section; 52-third tank bottom; 61-a tube body; 62-a tunnel pipe; 63-thermal insulation; 64-a docking flange; 621-reinforcing corrugated cardboard; 71-a circular ring; 72-a top cover; 73-connecting hole; 711-a first end portion; 712-a second end; 713-blind hole; 91-light cylinder structure; 92-a longitudinal reinforcement frame; 93-horizontal frame.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 3 to 5 together, the propellant tank of the present invention will now be described. The propellant storage tank comprises a first storage tank 4, a second storage tank 5 and a common tank bottom, wherein the first storage tank 4 is connected with the second storage tank 5; the shared box bottom is fixedly connected between the first storage box 4 and the second storage box), and the shared box bottom forms a closed structure with the joints of the first storage box 4 and the second storage box 5 respectively.

The utility model provides a propellant storage tank compares with prior art, has cancelled the series structure of 3 between the case section, directly is connected first storage tank 4 with second storage tank 5 through the sharing bottom of the case, can effectively shorten the arrow body height, reduces the slenderness ratio of carrier rocket, is favorable to increasing the stability of rocket to can be under the same condition of guaranteeing propellant filling amount, rocket weight is lightest, and space utilization is the highest, and carrying capacity is the biggest. And the standardized cylinder section structure and the standardized box bottom structure are adopted, so that the cost can be greatly reduced, the manufacturing period is shortened, and the reliability of the product is improved.

Further, referring to fig. 5 to 7, as a specific embodiment of the propellant storage tank provided by the present invention, the first storage tank 4 includes a first cylinder section 41, a first tank bottom 42 and a second tank bottom 43, and the first tank bottom 42 and the second tank bottom 43 are respectively located at two opposite ends of the first cylinder section 41; the second tank 5 comprises a second cylindrical section 51 and a third tank bottom 52, the second tank bottom 43 and the third tank bottom 52 are respectively located at two opposite ends of the second cylindrical section 51, and the second tank bottom 43 is the common tank bottom. Specifically, the first cylinder section 41 and the second cylinder section 51 have the same structure, and the first box bottom 42, the second box bottom 43, and the third box bottom 52 have the substantially same structure, which are the standardized cylinder section structure and box bottom structure. For the liquid carrier rocket, the equivalent advantages of the temperature regions of the oxidant liquid oxygen and the combustion agent methane low-temperature propellant are fully utilized, wherein the boiling point of methane is-161.4 ℃, the boiling point of liquid oxygen is-183 ℃, and the liquid oxygen is only 21.6 ℃ lower than the methane. The series structure of the tank interval section 3 is cancelled, the oxidant tank and the combustion agent tank are combined, the specific gravity of the propellant storage tank occupies more than 60% of the whole rocket body structure, the common-bottom storage tank can effectively shorten the height of the rocket body, reduce the slenderness ratio of the carrier rocket, and is beneficial to increasing the stability of the rocket.

Further, referring to fig. 5 to 7, as a specific embodiment of the propellant storage tank provided by the present invention, the first tank bottom 42 and the second tank bottom 43 are fixedly connected to the first cylinder section 41, respectively, and the second tank bottom 43 and the third tank bottom 52 are fixedly connected to the second cylinder section 51, respectively. Specifically, the first cylinder section 41 is directly and fixedly connected with the first box bottom 42 and the second box bottom 43, and the fixed connection mode can be a threaded connection mode, an adhesion mode or a welding mode; the second cylinder section 51 and the third box bottom 52 are also directly fixedly connected, and the fixed connection mode can be in a threaded connection mode, a bonding mode or a welding mode and the like, so that the first cylinder section 41 is separated from the first box bottom 42 and the second box bottom 43, and the second cylinder section 51 is separated from the third box bottom 52, so that a standardized structure is more favorably constructed, the standardized structure is smaller, and the assembly and the transportation are more favorably realized. Of course, according to practical situations and specific requirements, in other embodiments of the present invention, the first cylinder section 41, the first box bottom 42 and the second box bottom 43 may also be directly integrated, and the second cylinder section 51 and the third box bottom 52 are also directly integrated, which is not limited herein.

Further, please refer to fig. 5 to 7 together, as a specific embodiment of the propellant storage tank provided by the present invention, the first tank bottom 42, the second tank bottom 43 and the third tank bottom 52 all adopt a tank bottom 7, the tank bottom 7 includes a circular ring 71 and a top cover 72 fixed on the circular ring 71, and the top cover 72 is provided with a plurality of connecting holes 73. Specifically, the first box bottom 42, the second box bottom 43 and the third box bottom 52 are formed by the box bottom part 7, the functions of the three box bottoms can be considered, welding seams are eliminated by adopting a universal structure of the ring 71 part, all connecting holes 73 such as holes, flanges and the like are arranged on the large top cover 72, the top cover 72 is fixedly connected with the ring 71, and by adopting a standardized combined structure, the cost can be greatly reduced, the manufacturing period is shortened, and the reliability of products is improved. The connection hole 73 may include any one or more of a transfer port, a pressurization port, an exhaust port, a pressure measurement port, and a manhole.

Further, referring to fig. 5 to 7, as an embodiment of the propellant tank of the present invention, the ring 71 is formed by a single plate spinning, hydro-forming or explosion forming process. Specifically, the integrally formed ring 71 is formed by spinning, liquid-filling forming or explosion forming, wherein the middle of the ring 71 has a uniform thickness, and the thickness is determined by the internal pressure load and the temperature environment. The inner profile of the ring 71 may be spherical, ellipsoidal, or disc-shaped, and is not limited herein.

Further, referring to fig. 6, as a specific embodiment of the propellant storage tank provided by the present invention, the opposite ends of the ring 71 are a first end 711 and a second end 712, respectively, the diameter of the first end 711 is smaller than that of the second end 712, and the top cover 72 is fixed to the first end 711. Specifically, the cross-sectional shape of the circular ring 71 is a cone, an ellipsoid, a disc or the like, the first end 711 and the second end 712 are respectively located at two opposite ends of the circular ring 71, the circular ring 71 is of a hollow structure, the second tank bottom 43 at this time is of a downward convex structure relative to the second tank 5, and the common bottom of the downward convex structure is adopted to easily realize the normal outflow of the propellant in the first tank 4, i.e. the oxidizer tank, and the bottom sinking function in flight.

Further, referring to fig. 6 to 8, as a specific embodiment of the propellant storage tank of the present invention, the first end 711 is provided with a blind hole 713, the top cover 72 is provided with a first through hole, and the fixing member passes through the first through hole and the blind hole 713 and is fixedly connected thereto. Specifically, a plurality of threaded blind holes 713 are evenly distributed at the first end 711 of the ring 71, the first through holes arranged at corresponding positions on the top cover 72 are butted, the fixing piece sequentially penetrates through the first through holes and the blind holes 713 to realize the fixed connection between the top cover 72 and the ring 71, the connection tightness is better, the top cover 72 can be replaced, the standard box bottom structure is conveniently realized, the end of the ring 71 is the blind holes 713, and gas leakage can be effectively avoided. Wherein, the mounting can be fixed knot structures such as bolt, screw or fixed buckle.

Further, as a specific embodiment of the propellant tank of the present invention, a sealing ring (not shown) is further disposed at the connection between the top cover 72 and the first end 711. Specifically, the first end 711 is provided with a raised edge, the lower surface of the top cover 72 is provided with a groove for accommodating the raised edge, a sealing ring can be arranged at the joint of the raised edge and the groove, and the sealing ring can be arranged at the joint of the first end 711 and the top cover 72. Wherein, the sealing washer can be rubber or other materials that can realize sealed.

Further, referring to fig. 3 to 5, as an embodiment of the propellant storage tank provided by the present invention, the first cylinder section 41 and the second cylinder section 51 are formed by single plate body roll welding. Specifically, a traditional section of thick bamboo structure is a smooth section of thick bamboo structure 91 or interior grid reinforced structure, and a section of thick bamboo structure is by the splice welding of the 90 to 120 arc boards of polylith 2m internal length. First section of thick bamboo 41 and second section of thick bamboo 51 in this application adopt domestic advanced wide plate rolling technique, 360 cylinders with length about 4m carry out the roll welding, whole section of thick bamboo only has a longitudinal weld, wherein, the welding mode generally adopts friction stir welding mode, compare traditional many arc board mosaic structure, the reliability of product has been improved when losing weight, the production processes is also simplified greatly, manufacturing cycle shortens at least 50%, wherein, the internal surface of first section of thick bamboo 41 and second section of thick bamboo 51 can be smooth tube structure 91 or interior grid reinforced structure.

Preferably, referring to fig. 10, a truss frame reinforcing structure 9 may be disposed in each of the first cylinder section 41 and the second cylinder section 51, the truss frame reinforcing structure 9 includes a smooth cylinder, a longitudinal reinforcing frame 92, and a transverse frame 93, and the smooth cylinder is a hollow cylinder; the length direction of the longitudinal reinforcing frames 92 is consistent with the radial direction of the light tube, a plurality of longitudinal reinforcing frames 92 are fixed inside the light tube, and a plurality of longitudinal reinforcing frames 92 are uniformly arranged along the circumferential direction of the inside of the light tube; and the transverse frame 93 is arranged around the circumference of the light tube, and the transverse frame 93 is fixed on one side of the longitudinal reinforcing frame 92, which is far away from the light tube.

Compare for smooth section of thick bamboo structure 91 or interior grid reinforced structure with the internal surface of first section of thick bamboo section 41 and second section of thick bamboo section 51, consolidate the smooth section of thick bamboo with vertical reinforcement frame 92 and horizontal frame 93, strengthen the radial bearing capacity of smooth section of thick bamboo through vertical reinforcement frame 92, strengthen the horizontal bearing capacity of smooth section of thick bamboo through horizontal frame 93, and vertical reinforcement frame 92 and horizontal frame 93 all can construct general module, the independent component that it contains can be according to the nimble combination of task demand, adapt to wide load operating mode, and each part all adopts standard supply of material production, and manufacturing cost is lower. The smooth cylinder, the longitudinal reinforcing frame 92 and the transverse frame 93 in the storage box can be designed integrally, compared with a traditional mechanical milling wallboard, the structure is slightly changed locally, the design and the production can be flexibly processed, the process types can be effectively simplified, and the equipment investment and the turnover flow between processes are reduced. Truss frame additional strengthening 9 it has the light section of thick bamboo and makes simple advantage, still has the lightweight advantage that increases the rib grid structure that adds of vertical additional strengthening frame 92 and horizontal frame 93, has improved the limitation of traditional grid rib structure simultaneously.

Further, referring to fig. 3, fig. 5 and fig. 9, as a specific embodiment of the propellant storage tank provided by the present invention, two ends of the first cylinder section 41 are respectively welded to the first tank bottom 42 and the second tank bottom 43, and one end of the second cylinder section 51 is welded to the third tank bottom 52. Specifically, the first cylinder section 41 is directly welded with the first box bottom 42 and the second box bottom 43, the second cylinder section 51 is directly welded with the third box bottom 52, the welding mode is direct splicing welding, namely, the bottom surface of the first cylinder section 41 or the second cylinder section 51 is abutted with the bottom surface of the second end 712 and is rotationally welded, the initial deformation defect tolerance is high by adopting technologies such as friction stir welding and integral forming, the bearing performance of the product is improved, and the product can be repeatedly used for many times.

Further, referring to fig. 3, fig. 5 and fig. 9, as a specific embodiment of the propellant storage tank of the present invention, a fixing platform 431 is disposed outside the second tank bottom 43, and the second cylinder section 51 is welded to the fixing platform 431. Specifically, the fixing platform 431 is located on the outer side of the second box bottom 43, the fixing platform 431 is located on one side, close to the second end 712, of the second box bottom 43, the fixing platform 431 protrudes out of the second box bottom 43 to form a platform surface which can be abutted to the inner surface of the second barrel section 51, the fixing platform 431 and the inner surface of the second barrel section 51 are welded and fixed, the fixing structure is more stable, and the cost is lower.

Further, referring to fig. 4, 5 and 11, as a specific embodiment of the propellant storage tank provided by the present invention, one end of the delivery pipe 6 is fixed to the second tank bottom 43 and is communicated with the first storage tank 4, and the delivery pipe 6 passes through the second cylinder section 51 and the third tank bottom 52 and is communicated to the outside.

Further, referring to fig. 4, 5 and 11, as an embodiment of the propellant storage tank provided by the present invention, the delivery pipe 6 includes a pipe body 61, a tunnel pipe 62 sleeved outside the pipe body 61, and a heat insulating member 63 disposed between the tunnel pipe 62 and the pipe body 61. Specifically, tunnel pipe 62 is located the outside of conveyer pipe 6, and body 61 is the smooth wall structure, sets up tunnel pipe 62 in the outside of body 61 and can strengthen the intensity of body 61, avoids body 61 to take place to damage under the pressure effect, sets up adiabatic 63 between tunnel pipe 62 and body 61, can play heat preservation and adiabatic effect. The heat insulating member 63 is generally made of heat insulating foam, and the heat insulating foam is adhered between the pipe body 61 and the tunnel pipe 62.

Further, referring to fig. 11, as a specific embodiment of the propellant storage tank provided by the present invention, the opposite ends of the conveying pipe 6 are further provided with abutting flanges 64, and the abutting flanges 64 are respectively connected to the second tank bottom 43 and the third tank bottom 52. In particular, the delivery tube 6, which has two ends communicating with the second tank 43 and the third tank 52, respectively, has the function of transferring the contents of the first tank 4 to the outside of the entire propellant tank, without the contents of the first tank 4 and the second tank 5 mixing prematurely. The second box bottom 43 and the third box bottom 52 are provided with flange holes corresponding to the delivery pipe 6, and the flange holes are formed in the top cover 72, so that the second box bottom 43 and the third box bottom 52 can form a standardized structure.

Further, referring to fig. 11, as an embodiment of the propellant storage tank of the present invention, the tunnel pipe 62 has a plurality of reinforcing ribs 621 on the outer surface thereof. Specifically, the tunnel pipe 62 is generally an aluminum alloy plate rolled and welded to be expanded, and the height of the reinforcing convex edge is generally 10 to 15mm and the thickness is 2 to 3 mm. The reinforcing ribs 621 are provided around the outer surface of the tunnel tube 62, and can uniformly reinforce the strength of the entire tunnel tube 62, thereby supporting and protecting the tube body 61 inside the tunnel tube 62.

Further, referring to fig. 3 to 5, as an embodiment of the propellant storage tank provided by the present invention, it further includes a short cylinder 8, and the short cylinder 8 is disposed between the second cylinder section 51 and the third tank bottom 52. Specifically, the two ends of the short cylinder 8 are respectively welded with the second cylinder section 51 and the second end 712 of the third box bottom 52, the welding seam surrounds the short cylinder 8, the welding seam is less at the moment, the number of the welding seam is greatly reduced, the welding thickened area is correspondingly reduced, and the structural waste is reduced. Moreover, the length of the second storage tank 5 can be adjusted according to actual conditions, the short barrel part 8 can also be of a standardized structure, the product universalization degree is high, the reliability is high, and the cost is reduced

Further, as a specific embodiment of the propellant tank provided by the present invention, the short tube member 8 is formed by roll welding a single plate body. Specifically, the structure and the processing mode of short section of thick bamboo spare 8 are unanimous basically with the structure and the processing mode of first section of thick bamboo section 41 and second section of thick bamboo section 51, cancel the concatenation of polywall board to short section of thick bamboo spare 8, directly weld into the long cylinder with the friction stir book of 360 degrees arc boards, and processing cycle reduces by a wide margin than traditional structure, adopts advanced friction stir welding, the integrated forming technique is higher to initial deformation defect entrapment degree, and the bearing performance of product promotes, can used repeatedly many times.

Referring to figures 3 to 11, there is also provided a rocket including a propellant tank as in any one of the preceding claims, the first tank 4 being adapted to contain an oxidizer and the second tank 5 being adapted to contain a combustion agent.

The utility model provides a rocket has cancelled the series structure of the incasement section of thick bamboo 3, merges first storage tank 4 and second storage tank 5, can effectively shorten the rocket body height, reduces the slenderness ratio of carrier rocket, is favorable to increasing the stability of rocket to can be under the condition that guarantees that propellant filling amount is the same, rocket weight is lightest, and space utilization is the highest, and the carrying capacity is the biggest. And the standardized cylinder section structure and the standardized box bottom structure are adopted, so that the cost can be greatly reduced, the manufacturing period is shortened, and the reliability of the product is improved.

Specifically, the first storage tank 4 contains an oxidant, namely the first storage tank 4 is equivalent to the oxidant storage tank 1 in the prior art, and the oxidant is generally liquid oxygen and has a boiling point of-183 ℃; the second storage tank 5 contains a combustion agent, namely the second storage tank 5 is equivalent to the combustion agent storage tank 2, the combustion agent is generally methane, the boiling point of the methane is-161.4 ℃, and the boiling point of liquid oxygen is only 21.6 ℃ lower than that of the methane.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (18)

1. Propellant storage tank, its characterized in that: comprises that

A first tank (4) and a second tank (5), the first tank (4) and the second tank (5) being connected;

the box bottom is fixedly connected between the first storage box (4) and the second storage box (5), and a sealing structure is formed at the joint of the common box bottom and the first storage box (4) and the second storage box (5) respectively.

2. The propellant tank of claim 1 wherein: the first storage box (4) comprises a first cylinder section (41), a first box bottom (42) and a second box bottom (43), and the first box bottom (42) and the second box bottom (43) are respectively positioned at two opposite ends of the first cylinder section (41);

the second storage box (5) comprises a second cylinder section (51) and a third box bottom (52), the second box bottom (43) and the third box bottom (52) are respectively positioned at two opposite ends of the second cylinder section (51), and the second box bottom (43) is the common box bottom.

3. The propellant tank of claim 2 wherein: the first box bottom (42) and the second box bottom (43) are fixedly connected with the first cylinder section (41) respectively, and the second box bottom (43) and the third box bottom (52) are fixedly connected with the second cylinder section (51) respectively.

4. The propellant tank of claim 3 wherein: the first box bottom (42), the second box bottom (43) and the third box bottom (52) are all provided with bottom pieces (7), each bottom piece (7) comprises a circular ring (71) and a top cover (72) fixed on the circular ring (71), and a plurality of connecting holes (73) are formed in the top cover (72).

5. The propellant tank of claim 4 wherein: the circular ring (71) is made by a single plate body through the processing modes of spinning, liquid-filling forming or explosion forming.

6. The propellant tank of claim 4 wherein: the two opposite ends of the circular ring (71) are respectively a first end portion (711) and a second end portion (712), the diameter of the first end portion (711) is smaller than that of the second end portion (712), and the top cover (72) is fixed to the first end portion (711).

7. The propellant tank of claim 6 wherein: the first end portion (711) is provided with a blind hole (713), the top cover (72) is provided with a first through hole, and the fixing piece penetrates through the first through hole and the blind hole (713) and is fixedly connected with the blind hole.

8. The propellant tank of claim 6 wherein: and a sealing ring is further arranged at the joint of the top cover (72) and the first end part (711).

9. The propellant tank of claim 2 wherein: the first barrel section (41) and the second barrel section (51) are both formed from a single sheet body by roll welding.

10. The propellant tank of claim 3 wherein: two ends of the first cylinder section (41) are respectively welded with the first box bottom (42) and the second box bottom (43), and one end of the second cylinder section (51) is welded with the third box bottom (52).

11. The propellant tank of claim 10 wherein: the outer side of the second box bottom (43) is provided with a fixed table (431), and the second cylinder section (51) is welded with the fixed table (431).

12. The propellant tank of claim 2 wherein: the device also comprises a conveying pipe (6), one end of the conveying pipe (6) is fixed on the second tank bottom (43) and communicated with the first storage tank (4), and the conveying pipe (6) penetrates through the second cylinder section (51) and the third tank bottom (52) and is communicated to the outside.

13. The propellant tank of claim 12 wherein: the conveying pipe (6) comprises a pipe body (61), a tunnel pipe (62) sleeved outside the pipe body (61), and a heat insulation piece (63) arranged between the tunnel pipe (62) and the pipe body (61).

14. The propellant tank of claim 12 wherein: the two opposite ends of the conveying pipe (6) are also provided with butt flanges (64), and the butt flanges (64) are respectively connected with the second box bottom (43) and the third box bottom (52).

15. The propellant tank of claim 13 wherein: the outer surface of the tunnel tube (62) is provided with a plurality of reinforcing ribs (621).

16. A propellant tank as claimed in any one of claims 2 to 15 wherein: the novel box is characterized by further comprising a short barrel part (8), wherein the short barrel part (8) is arranged between the second barrel section (51) and the third box bottom (52).

17. The propellant tank of claim 16 wherein: the short cylinder (8) is formed by roll welding of a single plate body.

18. A rocket, characterized by: comprising a propellant tank according to any one of claims 1 to 17, said first tank (4) being intended to contain an oxidising agent and said second tank (5) being intended to contain a combustion agent.

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