Bladder tank and manufacturing method thereof

Abstract

This application provides a capsule-type propellant tank and its manufacturing method, comprising: a non-metallic capsule, a filling and discharging assembly, and a tank shell. The non-metallic capsule is located inside the tank shell, and the filling and discharging assembly is located inside the non-metallic capsule. The non-metallic capsule includes a fluoroplastic capsule and a rubber capsule. The filling and discharging assembly includes a conduit, a liquid-end connector, and a gas-end connector. The rubber capsule is nested outside the fluoroplastic capsule and encloses the entire fluoroplastic capsule in an inner cavity. The conduit has a liquid-end connector and a gas-end connector at both ends. The inner surface of the non-metallic capsule and the inner cavity of the filling and discharging assembly together form a liquid storage cavity, and the outer surface of the non-metallic capsule and the inner surface of the tank shell together form a gas storage cavity. This application solves the problems of poor compatibility of rubber capsules and poor density of fluoroplastic capsules in existing non-metallic propellant tanks by nesting the rubber capsule and the fluoroplastic capsule, realizing the function of long-term storage and management of highly corrosive propellants and expanding the application range of non-metallic capsule-type propellant tanks.

Description

Technical Field

[0001] This application relates to the field of space navigation technology, and more specifically, to a capsule-type storage tank and its manufacturing method. Background Technology

[0002] Non-metallic capsule-type propellant tanks, as one of the important types of propellant tanks, are characterized by their light weight, simple assembly process, high reliability, low and stable working pressure difference, and detectable product quality, and are widely used in spacecraft.

[0003] As the core component of this type of storage tank, the characteristics of non-metallic reservoirs determine the tank's application range. Currently, non-metallic reservoirs can be divided into rubber reservoirs and fluoroplastic reservoirs based on different materials. Rubber reservoirs are generally made of butyl rubber with low permeability or compounded rubber with butyl rubber as the main component. Due to the good elasticity and relatively high strength of rubber materials, they can withstand hundreds of filling and discharging cycles without structural damage. However, their compatibility with highly corrosive oxidants is poor, thus limiting their application in bicomponent systems and systems requiring long-term filling and storage or long-term operation in space. While fluoroplastic reservoirs are compatible with oxidants for a long time, their material density is poor, and the filling medium will experience very serious leakage in a short period, thus greatly limiting their long-term use. To expand the application range of reservoirs, some scholars have proposed and conducted research on rubber-plastic composite reservoirs, but so far, they have not been industrialized. Furthermore, their manufacturing process is complex, time-consuming, and costly, and there are also problems with manufacturing consistency testing. Therefore, there is a need to propose a non-metallic capsule-type storage tank that is simple in structure, low in manufacturing cost, and short in cycle time, and that can meet the requirements for long-term storage and management of highly corrosive propellants. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the purpose of this application is to provide a bladder-type storage tank and a method for manufacturing the same.

[0005] According to the present application, a bladder-type storage tank includes: a non-metallic storage bladder, a filling and draining assembly, and a storage tank shell. The non-metallic storage bladder is located inside the cavity of the storage tank shell, and the filling and draining assembly is located inside the cavity of the non-metallic storage bladder. The outer surface of the non-metallic storage bladder and the inner surface of the storage tank shell form a gas storage cavity, and the inner cavity of the non-metallic storage bladder and the inner cavity of the filling and draining assembly together form a liquid storage cavity.

[0006] The non-metallic reservoir is composed of a fluoroplastic capsule with an outer nested rubber capsule;

[0007] The feed assembly is composed of a liquid end connector, a conduit, and a gas end connector.

[0008] The tank shell includes: a main shell, a liquid end flange seat, a gas end flange seat, a liquid end flange end cover, a gas end flange end cover, and a locking ring; the gas end flange seat is disposed at the lower end of the main shell, and the liquid end flange seat is disposed at the upper end of the main shell;

[0009] The gas end flange cover is connected to the gas end flange seat to form a closed chamber. The gas end connector squeezes and fixes the lower end of the rubber bladder in the closed chamber. The gas end connector cooperates with the conduit to squeeze and fix the lower end of the fluoroplastic bladder and seal the inside. The gas end flange cover and the gas end flange seat are provided with gas channels that communicate with the gas storage chamber.

[0010] The liquid end flange cover is connected to the liquid end flange seat. The locking ring is fixedly connected to the liquid end flange cover by threads. The locking ring squeezes and fixes the inverted conical opening at the upper end of the fluoroplastic bladder and the rubber bladder and seals it internally between the liquid end connector and the liquid end flange seat. The liquid end flange cover and the locking ring are provided with liquid channels communicating with the liquid storage chamber.

[0011] Preferably, the lower end of the fluoroplastic bladder is a flat opening, which extends between the conduit and the gas end connector. The conduit and the gas end connector are threaded together and compress and fix the flat opening at the lower end of the fluoroplastic bladder and seal it internally.

[0012] Preferably, the upper end of the rubber bladder extends upward into the liquid end flange seat and then extends along the inner wall of the liquid end flange seat to form a platform opening. The platform opening at the upper end of the rubber bladder is squeezed and fixed by the liquid end flange end cap and the liquid end flange seat and is sealed internally.

[0013] Preferably, the upper opening of the fluoroplastic bag is an inverted cone-shaped opening with a cone angle α between 10° and 30° and a major diameter D1 between 50 mm and 60 mm;

[0014] The lower opening of the fluoroplastic capsule is a flat opening with a diameter D2 of 10 mm to 20 mm;

[0015] The upper opening of the rubber bladder is an "inverted cone + platform + limiting ring" opening with a cone angle of α, a width W between 10mm and 15mm, and an interface diameter D3 between 4mm and 6mm.

[0016] Preferably, the fluoroplastic capsule wall thickness is 0.3 mm to 0.5 mm;

[0017] The wall thickness of the rubber bladder is 1 mm to 1.5 mm.

[0018] Preferably, the fluoroplastic bladder and the rubber bladder are connected by a gel.

[0019] Preferably, the liquid end connector is a conical cylindrical structure, and the cone angle of the conical cylindrical structure is the same as and matches the cone angle of the fluoroplastic capsule.

[0020] Preferably, the expansion or contraction of the non-metallic reservoir enables the loading or release of propellant;

[0021] The outer surface of the non-metallic reservoir body in the unfolded state is attached to the inner surface of the main shell.

[0022] Preferably, the locking ring has a polygonal through hole at its center with a maximum diameter smaller than the liquid port diameter on the liquid end flange cover;

[0023] The conduit has circumferentially distributed through holes with a diameter of 3 mm to 8 mm.

[0024] This application also provides a method for manufacturing a bladder-type storage tank. According to the method, the aforementioned bladder-type storage tank can be manufactured. The method includes:

[0025] Step 1: Connect the liquid end connector and the conduit and insert them into the inner cavity of the fluoroplastic capsule;

[0026] Step 2: Connect the gas end connector to achieve fixation and sealing. After connection, it is located inside the fluoroplastic bladder, thus forming assembly one.

[0027] Step 3: Insert the assembly into the inner cavity of the rubber bladder;

[0028] Step 4: Fill the space between the fluoroplastic bladder and the rubber bladder with adhesive;

[0029] Step 5: Fill the inner cavity through the liquid end connector to ensure that the outer surface of the fluoroplastic bladder and the inner surface of the rubber bladder are firmly adhered to each other, forming assembly two;

[0030] Step 6: Connect the main housing, liquid end flange seat and gas end flange seat to form assembly three; connect the locking ring to the liquid end flange end cover to form assembly four; connect the O-ring to the gas end flange end cover to form assembly five.

[0031] Step 7: Install assembly two into assembly three, and then use connecting bolts to connect assembly four and assembly five to assembly three;

[0032] Step 8: Tighten the locking ring downwards to ensure the internal seal of the non-metallic reservoir, thus forming a double-layered nested non-metallic reservoir.

[0033] Compared with the prior art, this application has the following beneficial effects:

[0034] 1. This application solves the problems of poor compatibility of rubber bladders and poor density of fluoroplastic bladders in existing non-metallic storage tanks by nesting rubber bladders and fluoroplastic bladders, realizes the function of long-term storage and management of highly corrosive propellants, and expands the application scope of non-metallic bladder-type storage tanks.

[0035] 2. This application achieves the function of long-term propellant storage and management by setting inverted conical openings and flat openings at the upper and lower ends of the fluoroplastic bladder, and setting sealing and fastening structures at the upper and lower ends of the rubber bladder. Moreover, the non-metallic bladder structure is simple, with a short manufacturing cycle and low cost. Attached Figure Description

[0036] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0037] Figure 1 This application mainly illustrates the overall structure of the bladder-type storage tank;

[0038] Figure 2 This application mainly illustrates the upper structure of the bladder-type storage tank;

[0039] Figure 3 This application mainly illustrates the lower structure of the bladder-type storage tank.

[0040] The figure shows: 1. Non-metallic reservoir; 11. Fluoroplastic reservoir; 12. Rubber reservoir; 2. Addition and discharge assembly; 21. Liquid end connector; 22. Conduit; 23. Gas end connector; 3. Reservoir shell; 31. Main shell; 32. Liquid end flange seat; 33. Gas end flange seat; 34. Liquid end flange end cap; 35. Gas end flange end cap; 36. Locking ring; 4. Gas storage chamber; 5. Liquid storage chamber; 6. Connecting bolt; 7. O-ring. Detailed Implementation

[0041] The present application will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present application. These all fall within the protection scope of the present application.

[0042] The bladder-type storage tank provided in this application includes: a non-metallic storage bladder 1, a filling and draining assembly 2, and a storage tank shell 3. The non-metallic storage bladder 1 is located inside the cavity of the storage tank shell 3, the filling and draining assembly 2 is located inside the cavity of the non-metallic storage bladder 1, the outer surface of the non-metallic storage bladder 1 and the inner surface of the storage tank shell 3 form a gas storage cavity 4, and the inner cavity of the non-metallic storage bladder 1 and the inner cavity of the filling and draining assembly 2 together form a liquid storage cavity 5.

[0043] The non-metallic reservoir is composed of a fluoroplastic capsule 11 with an outer nested rubber capsule 12.

[0044] The addition / discharge assembly 2 is composed of a liquid end connector 21, a conduit 22, and a gas end connector 23 connected together.

[0045] The tank shell 3 includes: a main shell 31, a liquid end flange seat 32, a gas end flange seat 33, a liquid end flange end cover 34, a gas end flange end cover 35, and a locking ring 36; the gas end flange seat 33 is disposed at the lower end of the main shell, and the liquid end flange seat 32 is disposed at the upper end of the main shell 31.

[0046] The gas end flange cover 35 is connected to the gas end flange seat 33 to form a closed chamber. The gas end connector 23 squeezes and fixes the lower end of the rubber bladder 12 in the closed chamber. The gas end connector 23 cooperates with the conduit 22 to squeeze and fix the lower end of the fluoroplastic bladder 11 and seal the inside. The gas end flange cover 35 and the gas end flange seat 33 are provided with gas channels that communicate with the gas storage chamber 4.

[0047] The liquid end flange cover 34 is connected to the liquid end flange seat 32. The locking ring 36 is fixedly connected to the liquid end flange cover 34 by threads. The locking ring 36 squeezes and fixes the inverted conical opening at the upper end of the fluoroplastic bladder 11 and the rubber bladder 12 and seals them internally between the liquid end connector 21 and the liquid end flange seat 32. The liquid end flange cover 34 and the locking ring 36 are provided with liquid channels that communicate with the liquid storage chamber 5.

[0048] The lower end of the fluoroplastic bladder 11 is a flat opening. The flat opening at the lower end of the fluoroplastic bladder 11 extends between the conduit 22 and the gas end connector 23. The conduit 22 and the gas end connector 23 are threaded together and squeeze and fix the flat opening at the lower end of the fluoroplastic bladder 11 and seal it internally.

[0049] The upper end of the rubber bladder 12 extends upward into the liquid end flange seat 32 and then extends along the inner wall of the liquid end flange seat 32 to form a platform opening. The platform opening at the upper end of the rubber bladder 12 is squeezed and fixed by the liquid end flange end cap 34 and the liquid end flange seat 32 and sealed internally.

[0050] The upper opening of the fluoroplastic capsule 11 is an inverted cone-shaped opening with a cone angle α between 10° and 30° and a large diameter D1 between 50 mm and 60 mm.

[0051] The lower opening of the fluoroplastic capsule 11 is a flat opening with a diameter D2 of 10 mm to 20 mm;

[0052] The upper opening of the rubber bladder 12 is an "inverted cone + platform + limiting ring" opening with a cone angle of α, a width W between 10mm and 15mm, and an interface diameter D3 between 4mm and 6mm.

[0053] The fluoroplastic capsule 11 has a wall thickness of 0.3 mm to 0.5 mm; the rubber capsule 12 has a wall thickness of 1 mm to 1.5 mm.

[0054] The fluoroplastic bladder 11 and the rubber bladder 12 are connected by a gel.

[0055] The liquid end connector 21 is a conical cylindrical structure, and the cone angle of the conical cylindrical structure is the same as and matches the cone angle of the fluoroplastic bag 11.

[0056] The deployment or retraction of the non-metallic reservoir 1 enables the loading or release of propellant;

[0057] The outer surface of the main body of the non-metallic reservoir 1 in the unfolded state is attached to the inner surface of the main shell 31.

[0058] The locking ring 36 has a polygonal through hole at its center with a maximum diameter smaller than the liquid port diameter on the liquid end flange cover 34.

[0059] The conduit 22 has circumferentially distributed through holes with a diameter of 3 mm to 8 mm.

[0060] This application also provides a method for manufacturing a bladder-type storage tank. According to this method, the aforementioned bladder-type storage tank can be manufactured. The method includes:

[0061] Step 1: Connect the liquid end connector 21 and the conduit 22 and insert them into the inner cavity of the fluoroplastic capsule 11;

[0062] Step 2: Connect the gas end connector 23 to achieve fixation and sealing. After connection, it is located inside the fluoroplastic bladder 11, thus forming assembly one.

[0063] Step 3: Insert the assembly into the inner cavity of the rubber bladder 12;

[0064] Step 4: Fill the space between the fluoroplastic bladder 11 and the rubber bladder 12 with adhesive;

[0065] Step 5: Inflate the inner cavity through the liquid end connector 21 to ensure that the outer surface of the fluoroplastic bladder 11 and the inner surface of the rubber bladder 12 are firmly adhered to each other, forming assembly two;

[0066] Step 6: Connect the main housing 31, the liquid end flange seat 32 and the gas end flange seat 33 to form assembly three; connect the locking ring 36 to the liquid end flange end cover 34 to form assembly four; and connect the O-ring 7 to the gas end flange end cover 35 to form assembly five.

[0067] Step 7: Install assembly two into assembly three, and then use connecting bolts 6 to connect assembly four and assembly five to assembly three;

[0068] Step 8: Tighten the locking ring 36 downwards to ensure the internal sealing of the non-metallic reservoir 1, thus forming a double-layer nested non-metallic reservoir.

[0069] The following are specific embodiments of this application.

[0070] The present invention provides a bladder-type storage tank, comprising a non-metallic storage bladder 1, a filling and draining assembly 2, and a storage tank shell 3; the non-metallic storage bladder is composed of a fluoroplastic bladder 11 with a rubber bladder 12 nested inside it; the filling and draining assembly 2 is composed of a liquid end connector 21, a conduit 22, and a gas end connector 23 connected together; the storage tank shell 3 is assembled from a main shell 31, a liquid end flange seat 32, a gas end flange seat 33, a liquid end flange end cover 34, a gas end flange end cover 35, and a locking ring 36.

[0071] The non-metallic reservoir 1 is located inside the cavity of the tank shell 3, and the filling and discharging assembly 2 is located inside the cavity of the non-metallic reservoir 1; the outer surface of the non-metallic reservoir 1 and the inner surface of the tank shell 3 form the gas storage cavity 4, and the inner cavity of the non-metallic reservoir 1 and the inner cavity of the filling and discharging assembly 2 together form the liquid storage cavity 5.

[0072] Specifically, the fluoroplastic bladder 11 primarily functions as a storage container for highly corrosive propellants, and together with the rubber bladder 12, it performs propellant management. Firstly, considering the properties of fluoroplastic materials and manufacturing processes, to ensure reliable and wrinkle-free folding and unfolding, the wall thickness t1 of the fluoroplastic bladder 11 needs to be relatively small, typically 0.3~0.5mm. Secondly, to achieve fixation and sealing, an inverted conical opening with a cone angle α of 10~30° and a major diameter D1 of 50~60mm is provided at its upper end, and a flat opening with a diameter D2 of 10~20mm is provided at its lower end.

[0073] Specifically, the rubber bladder 12 primarily fulfills the internal sealing requirements of the storage tank (the seal between the gas storage chamber 4 and the liquid storage chamber 5), and works in conjunction with the fluoroplastic bladder 11 to achieve propellant management. Since its sealing performance is directly determined by its wall thickness, the wall thickness t2 of the rubber bladder 12 needs to be relatively large, typically 1~1.5mm. Secondly, to achieve its fixation and sealing, an inverted conical opening with the same cone angle α and major diameter as the fluoroplastic bladder 11 is provided at its upper end. A platform with a width W1 of 10~15mm extends outward from the major diameter, and a clamping and limiting ring with a cross-sectional diameter D3 of 4~6mm is provided along the outer edge of the platform. A spherical cylindrical boss with an outer diameter of 20~30mm and a height of 30~40mm is provided at its lower end.

[0074] Specifically, the liquid end connector 21 is a conical cylindrical structure with a cone angle that is the same as the cone angle of the fluoroplastic bladder 11, so as to cooperate with the liquid end flange seat 32 to realize the function of pressing the plastic bladder and the inverted conical opening of the rubber bladder 12; in addition, through holes are provided on its upper and lower end faces to realize the function of collecting and transporting propellant.

[0075] Specifically, the conduit 22 has circumferentially distributed through holes with a diameter of 3-8 mm to collect and transport propellant; in addition, its lower end face is provided with a platform with an outer diameter 20-30 mm larger than the diameter of the flat opening at the lower end of the fluoroplastic bladder 11, so as to cooperate with the gas end connector 23 to compress the flat opening of the fluoroplastic bladder.

[0076] Specifically, the gas end connector 23 is a spherical blind hole structure. Its outer surface is the same as the inner surface of the boss at the lower end of the rubber bladder 12. A platform with an inner diameter and an outer diameter that are 5-8 mm smaller and 20-30 mm larger than the diameter of the flat opening at the lower end of the fluoroplastic bladder 11, respectively, is provided on its upper part to cooperate with the catheter 22 to achieve the function of pressing the flat opening of the plastic bladder.

[0077] Specifically, the locking ring 36 has a polygonal through hole at its center with a maximum diameter smaller than the liquid port diameter on the liquid end flange cover 34, in order to compress the liquid end connector 21.

[0078] Specifically, the plastic bladder and the rubber bladder 12 are bonded together with adhesive, the conduit 22 and the gas end connector 23 are connected by screws, the locking ring 36 and the liquid end flange cover 34 are connected by screws; the liquid end flange cover 34 and the liquid end flange seat 32 are connected by screws, and the gas end flange cover 35 and the gas end flange seat 33 are connected by screws.

[0079] Locking ring 36 is used to press and fix the inverted conical openings at the upper ends of the fluoroplastic bladder 11 and the rubber bladder 12 between the liquid end connector 21 and the liquid end flange seat 32. Connecting bolts are used to press and fix the platform opening at the upper end of the rubber bladder 12 between the liquid end flange end cap 34 and the liquid end flange seat 32. The conduit 22 and the gas end connector 23 are used to press and fix the flat opening at the lower end of the fluoroplastic bladder 11. Connecting bolts are used to press and fix the spherical boss at the lower end of the rubber bladder 12 between the gas end flange end cap 35 and the gas end flange seat 33. The above connection achieves the internal sealing in the storage tank (i.e., the sealing between the gas storage chamber 4 and the liquid storage chamber 5).

[0080] In addition, the liquid end flange cover 34 and the gas end flange cover 35 are respectively sealed to the external of the liquid end flange seat 32 and the gas end flange seat 33 by O-rings 7 (that is, the gas storage chamber 4 and the liquid storage chamber 5 are sealed to the outside of the storage tank).

[0081] The propellant is loaded and discharged by deploying and retracting the non-metallic reservoir 1. In the deployed state, the outer surface of the main body of the non-metallic reservoir 1 is in contact with the inner surface of the main shell 31 in the reservoir shell 3.

[0082] Furthermore, the method for manufacturing a bladder-type storage tank provided in this application is characterized by comprising the following steps:

[0083] Step 1: Connect the liquid end connector 21 and the conduit 22 and insert them into the inner cavity of the fluoroplastic bladder 11. Then connect the gas end connector 23 to achieve fixation and sealing, thus forming assembly one.

[0084] Step 2: Nest the first assembly into the inner cavity of the rubber bladder 12, ensuring that the gas end connector 23 is inserted into the lower end protrusion of the rubber bladder 12, and fill the space between the fluoroplastic bladder 11 and the rubber bladder 12 with adhesive. Inflate the inner cavity through the liquid end connector 21 to ensure that the outer surface of the fluoroplastic bladder 11 and the inner surface of the rubber bladder 12 are firmly adhered to each other, thus forming the second assembly.

[0085] Step 3: Connect the main housing 31, liquid end flange seat 32, and gas end flange seat 33 to form assembly three; connect the locking ring 36 and O-ring 7 to the liquid end flange end cover 34 to form assembly four; connect the O-ring 7 to the gas end flange end cover 35 to form assembly five.

[0086] Step 4: Install assembly two into assembly three, and then use connecting bolts to connect assembly four and assembly five to assembly three.

[0087] Step 5: Tighten the locking ring 36 downwards to ensure the internal seal of the non-metallic reservoir, thus forming the reservoir.

[0088] When the tank is being filled, propellant is introduced into the liquid storage chamber 5 through the liquid port on the liquid end flange cap 34 until it is full. At this time, the non-metallic reservoir 1 is in the deployed state. When the tank is being discharged, pressurized gas is introduced into the gas storage chamber 4 through the gas port on the gas end flange cap 35. Under the action of the internal and external pressure difference, the non-metallic reservoir 1 gradually changes from the deployed state to the retracted state, thereby squeezing the propellant in the liquid storage chamber 5 and discharging it through the liquid port on the liquid end flange cap 34 via the discharge assembly 2.

[0089] The basic embodiments of this application have been described above. The following describes the application in more detail with reference to preferred embodiments and / or variations of the basic embodiments.

[0090] Example 2:

[0091] like Figure 1 As shown, a bladder-type storage tank is characterized by comprising a non-metallic storage bladder 1, a filling and draining assembly 2, and a storage tank shell 3.

[0092] The non-metallic reservoir 1 is composed of a fluoroplastic bladder 11 with a rubber bladder 12 nested inside; the filling and draining assembly 2 is composed of a liquid end connector 21, a conduit 22 and a gas end connector 23 connected together; the reservoir shell 3 is composed of a main shell 31, a liquid end flange seat 32, a gas end flange seat 33, a liquid end flange end cover 34, a gas end flange end cover 35 and a locking ring 36 assembled together.

[0093] The non-metallic reservoir 1 is located inside the cavity of the tank shell 3, and the filling and discharging assembly 2 is located inside the cavity of the non-metallic reservoir 1; the outer surface of the non-metallic reservoir 1 and the inner surface of the tank shell 3 form a gas storage cavity 4, and the inner cavity of the non-metallic reservoir 1 and the inner cavity of the filling and discharging assembly 2 together form a liquid storage cavity 5.

[0094] The fluoroplastic bladder 11 has an inverted conical opening and a flat opening at its upper and lower ends, respectively; the rubber bladder 12 has an inverted conical + platform + limiting ring opening and a spherical protrusion at its upper and lower ends, respectively.

[0095] Locking ring 36 is used to squeeze and fix the inverted conical opening at the upper end of fluoroplastic bladder 11 and rubber bladder 12 and internally seal them between liquid end connector 21 and liquid end flange seat 32. Connecting bolts are used to squeeze and fix the platform opening at the upper end of rubber bladder 12 and internally seal it between liquid end flange end cover 34 and liquid end flange seat 32. Conduit 22 and gas end connector 23 are used to squeeze and fix the flat opening at the lower end of fluoroplastic bladder 11 and internally seal it. Connecting bolts are used to squeeze and fix the spherical boss at the lower end of rubber bladder 12 between gas end flange end cover 35 and gas end flange seat 33.

[0096] Both the liquid end flange cover 34 and the gas end flange cover 35 achieve external sealing with the liquid end flange seat 32 and the gas end flange seat 33 respectively through O-rings 7.

[0097] The propellant is loaded and discharged by deploying and retracting the non-metallic reservoir 1. In the deployed state, the outer surface of the main body of the non-metallic reservoir 1 is in contact with the inner surface of the main shell 31 in the reservoir shell 3.

[0098] Specifically, in this embodiment, the fluoroplastic capsule 11 has a wall thickness of 0.3 mm, an upper inverted conical opening with a cone angle of 10° and a major diameter of 50 mm, and a lower flat opening with a diameter of 20 mm.

[0099] Specifically, in this embodiment, the wall thickness of the rubber bladder 12 is 1.5 mm, the cone angle and major diameter of the upper inverted conical opening are the same as those of the fluoroplastic bladder 11, the width of the platform opening is 15 mm, the diameter of the compression limiting ring section is 6 mm, and the outer diameter of the lower spherical boss is 30 mm and the height is 40 mm.

[0100] Specifically, in this embodiment, the liquid end connector 21 is a conical cylindrical structure with the same cone angle as the cone angle of the fluoroplastic bag 11, and through holes are provided on its upper and lower end faces.

[0101] Specifically, in this embodiment, the catheter 22 has circumferentially distributed through holes with a diameter of 5 mm, and the lower end face is provided with a platform with an outer diameter 20 mm larger than the diameter of the flat opening at the lower end of the fluoroplastic bladder 11.

[0102] Specifically, in this embodiment, the gas end connector 23 is a spherical blind hole structure, the outer surface of which is the same as the inner surface of the lower end boss of the rubber bladder 12, and a platform is provided on its upper part with an inner diameter and an outer diameter that are 5mm smaller and 20mm larger than the lower end flat opening diameter of the fluoroplastic bladder 11, respectively.

[0103] Specifically, in this embodiment, the locking ring 36 is provided with a hexagonal through hole at its center, the maximum diameter of which is smaller than the liquid port diameter on the liquid end flange cover 34.

[0104] Specifically, in this embodiment, the plastic bladder and the rubber bladder 12 are bonded together with adhesive, the conduit 22 and the gas end connector 23 are connected by screws, the locking ring 36 and the liquid end flange cover 34 are connected by screws; the liquid end flange cover 34 and the liquid end flange seat 32 are connected by screws, and the gas end flange cover 35 and the gas end flange seat 33 are connected by screws.

[0105] Compared with existing technologies, the shielding cover physical isolation device with wireless interference suppression function described in this invention can not only isolate external co-channel interference and other electromagnetic interference, solving the problem of unstable or even lost-locked RF unit signals caused by external interference during integrated testing of the measurement system; it can also reduce internal electromagnetic echoes, avoiding damage to the rocket's RF unit components due to excessive electromagnetic echoes inside the shielding cover; and it can further replace the traditional testing method of manually adjusting the ground antenna, greatly reducing manpower and time costs, and improving testing efficiency and operational reliability.

[0106] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0107] The specific embodiments of this application have been described above. It should be understood that this application is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this application. Unless otherwise specified, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other.

Claims

1. A bladder-type storage tank, characterized in that, include: The non-metallic reservoir (1), the filling and draining assembly (2), and the tank shell (3) are provided. The non-metallic reservoir (1) is located inside the cavity of the tank shell (3), and the filling and draining assembly (2) is located inside the cavity of the non-metallic reservoir (1). The outer surface of the non-metallic reservoir (1) and the inner surface of the tank shell (3) form a gas storage cavity (4). The inner cavity of the non-metallic reservoir (1) and the inner cavity of the filling and draining assembly (2) together form a liquid storage cavity (5). The non-metallic reservoir is composed of a fluoroplastic bladder (11) with a rubber bladder (12) nested inside it; The addition and discharge assembly (2) is composed of a liquid end connector (21), a conduit (22), and a gas end connector (23). The tank shell (3) includes: a main shell (31), a liquid end flange seat (32), a gas end flange seat (33), a liquid end flange end cover (34), a gas end flange end cover (35), and a locking ring (36); the gas end flange seat (33) is disposed at the lower end of the main shell, and the liquid end flange seat (32) is disposed at the upper end of the main shell (31); The gas end flange cap (35) is connected to the gas end flange seat (33) to form a closed chamber. The gas end connector (23) squeezes and fixes the lower end of the rubber bladder (12) in the closed chamber. The gas end connector (23) cooperates with the conduit (22) to squeeze and fix the lower end of the fluoroplastic bladder (11) and seal the inside. The gas end flange cap (35) and the gas end flange seat (33) are provided with gas channels that communicate with the gas storage chamber (4). The liquid end flange cap (34) is connected to the liquid end flange seat (32). The locking ring (36) is fixedly connected to the liquid end flange cap (34) in the form of threads. The locking ring (36) squeezes and fixes the inverted conical opening at the upper end of the fluoroplastic bladder (11) and the rubber bladder (12) and seals it internally between the liquid end connector (21) and the liquid end flange seat (32). The liquid end flange cap (34) and the locking ring (36) are provided with liquid channels communicating with the liquid storage chamber (5).

2. The bladder-type storage tank as described in claim 1, characterized in that, The lower end of the fluoroplastic bladder (11) is a flat opening. The flat opening at the lower end of the fluoroplastic bladder (11) extends between the conduit (22) and the gas end connector (23). The conduit (22) and the gas end connector (23) are threaded together and squeeze and fix the flat opening at the lower end of the fluoroplastic bladder (11) and seal it internally.

3. The bladder-type storage tank as described in claim 1, characterized in that, The upper end of the rubber bladder (12) extends upward into the liquid end flange seat (32) and then extends along the inner wall of the liquid end flange seat (32) to form a platform opening. The platform opening at the upper end of the rubber bladder (12) is squeezed and fixed by the liquid end flange end cap (34) and the liquid end flange seat (32) and sealed internally.

4. The bladder-type storage tank as described in claim 1, characterized in that, The upper opening of the fluoroplastic capsule (11) is an inverted cone-shaped opening with a cone angle α between 10° and 30° and a large diameter D1 between 50 mm and 60 mm. The lower opening of the fluoroplastic capsule (11) is a flat opening with a diameter D2 of 10 mm to 20 mm; The upper opening of the rubber bladder (12) is an "inverted cone + platform + limiting ring" opening with a cone angle of α, a width W between 10mm and 15mm, and an interface diameter D3 between 4mm and 6mm.

5. The bladder-type storage tank as described in claim 1, characterized in that, The fluoroplastic capsule (11) has a wall thickness of 0.3 mm to 0.5 mm; The wall thickness of the rubber bladder (12) is 1 mm to 1.5 mm.

6. The bladder-type storage tank as described in claim 1, characterized in that, The fluoroplastic bladder (11) and the rubber bladder (12) are connected by a gel.

7. The bladder-type storage tank as described in claim 1, characterized in that, The liquid end connector (21) is a conical cylindrical structure, and the cone angle of the conical cylindrical structure is the same as and matches the cone angle of the fluoroplastic bag (11).

8. The bladder-type storage tank as described in claim 1, characterized in that, The deployment or retraction of the non-metallic reservoir (1) enables the loading or release of propellant; The outer surface of the main body of the non-metallic reservoir (1) in the unfolded state is attached to the inner surface of the main shell (31).

9. The bladder-type storage tank as described in claim 1, characterized in that, The locking ring (36) has a polygonal through hole at its center with a maximum diameter smaller than the liquid port diameter on the liquid end flange cover (34); The conduit (22) has circumferentially distributed through holes with a diameter of 3 mm to 8 mm.

10. A method for manufacturing a bladder-type storage tank, characterized in that, According to the method for manufacturing the bladder-type tank, a bladder-type tank as described in any one of claims 1-9 can be manufactured, wherein the method for manufacturing the bladder-type tank includes: Step 1: Connect the liquid end connector (21) and the conduit (22) and insert them into the inner cavity of the fluoroplastic capsule (11); Step 2: Connect the gas end connector (23) to achieve fixation and sealing. After connection, it is located inside the fluoroplastic bag (11), thus forming assembly one; Step 3: Insert the assembly into the inner cavity of the rubber bladder (12); Step 4: Fill the space between the fluoroplastic bladder (11) and the rubber bladder (12) with adhesive; Step 5: Inflate the inner cavity through the liquid end connector (21) to ensure that the outer surface of the fluoroplastic bladder (11) and the inner surface of the rubber bladder (12) are firmly bonded together to form the second assembly. Step 6: Connect the main housing (31), liquid end flange seat (32) and gas end flange seat (33) to form assembly three; connect the locking ring (36) to the liquid end flange end cover (34) to form assembly four; connect the O-ring (7) to the gas end flange end cover (35) to form assembly five. Step 7: Install assembly 2 into assembly 3, and then use connecting bolts (6) to connect assembly 4 and assembly 5 to assembly 3; Step 8: Tighten the locking ring (36) downwards to ensure the internal sealing of the non-metallic reservoir (1), and finally form a double-layer nested non-metallic reservoir.

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