Tank body for freezing liquefied gas railway tank car

Abstract

The utility model discloses a tank body of a railway tank car for freezing liquefied gas, which comprises a shell and an inner container arranged in the shell, and an interlayer is formed between the shell and the inner container; the inner container comprises a first cylinder section and first elliptical heads arranged at the two ends of the first cylinder section; the shell comprises a second cylinder section and second elliptical heads arranged at the two ends of the second cylinder section; a connecting rod is arranged between the inner container and the shell; the interlayer supporting structure for the tank body is arranged between the inner container and the shell; a shell explosion-proof plug is arranged on the second cylinder section; the interlayer formed between the inner container and the shell is vacuumized, the cold insulation and heat insulation effects of the tank body are achieved, the freezing liquefaction state of gas in the tank is maintained, the volatilization rate of liquid oxygen is reduced, the liquid oxygen transportation efficiency is improved, and the technical problem that in the prior art, liquid oxygen transportation is prone to volatilization, and the transportation efficiency is low is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of frozen liquefied gas transportation relates to tank car, concretely is a kind of tank body for frozen liquefied gas railway tank car. BACKGROUND

[0002] Liquid oxygen is a kind of key industrial gas, plays an important role in industrial production, involves metal processing, aerospace, medical treatment, energy, environmental protection and multiple fields.Liquid oxygen belongs to cryogenic liquefied gas, and its volume energy density is very high, 1L liquid oxygen is vaporized into 800L oxygen gas at 0 DEG C, 101.325kPa state, so when storing and transporting oxygen of same mass, liquid oxygen is much smaller than gaseous oxygen in space.Liquid oxygen can greatly reduce the volume of storage and transportation container, and improve transportation efficiency.Liquid oxygen transportation mode mainly includes tank ship transportation, railway tank car transportation, bottle transportation and automobile tank car transportation, and liquid oxygen railway tank car is more economical and safe in the case of long-distance and large-volume transportation.

[0003] Liquid oxygen is a kind of deep cold oxygen storage technology, when it is vaporized into gas, the volume will expand rapidly, and then the pressure of storage container increases, which brings danger to the life safety of operating personnel.Meanwhile, liquid oxygen is a strong combustion-supporting agent and strong oxidant, and when it contacts with combustible and reducing substances, it reacts violently, which can easily cause fire and even explosion.Liquid oxygen evaporates due to heat transfer during transportation, which not only reduces the transportation efficiency, but also increases the safety risk.Due to the volatility and flammability of oxygen, the storage and transportation of liquid oxygen are limited, and how to transport liquid oxygen more safely and reliably is an important research topic at present. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies existing in the prior art, the purpose of the utility model is to provide a tank body for frozen liquefied gas railway tank car, to solve the technical problem of low transportation efficiency caused by the volatility and danger of liquid oxygen transportation in the prior art.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions to achieve:

[0006] A kind of interlayer support structure for tank body, tank body includes shell and content container, the shell and content container form interlayer, the axial front end of the interlayer is provided with four sliding ends, the axial rear end of the interlayer is provided with four fixed ends;

[0007] The fixed end comprises a shell support cover connected with the inner wall of the shell and an inner container support cover connected with the outer wall of the inner container, the shell support cover and the inner container support cover are oppositely arranged and do not contact and form a first cavity, a composite support is arranged in the first cavity, the composite support comprises a first glass steel pad plate, a first tubular glass steel sleeve ring, a plurality of plate type glass steel sleeve rings, a second tubular glass steel sleeve ring and a second glass steel pad plate arranged in sequence from bottom to top, and the first glass steel pad plate, the first tubular glass steel sleeve ring, the plurality of plate type glass steel sleeve rings, the second tubular glass steel sleeve ring and the second glass steel pad plate form a second cavity, and a stainless steel reinforcing part is arranged in the second cavity.

[0008] The utility model also includes the following technical features:

[0009] Two pairs of rib plates are arranged on the outer side wall of the shell support cover.

[0010] The stainless steel reinforcing part is in transition fit with the second cavity.

[0011] The shell support cover and the inner container support cover are both long circular column bodies with one end face open, and the interiors thereof are cavities.

[0012] The outer edges of the first glass steel pad plate, the first tubular glass steel sleeve ring and the plate type glass steel sleeve ring are of the same shape, the first glass steel pad plate and the second glass steel pad plate are of the same structure, and the first tubular glass steel sleeve ring and the second tubular glass steel sleeve ring are of the same structure.

[0013] The stainless steel reinforcing part is a long circular column body, and a plurality of through holes are formed in the stainless steel reinforcing part and are distributed along the axial direction.

[0014] The layer direction of the first tubular glass steel sleeve ring and the second tubular glass steel sleeve ring is circumferential, and the layer directions of the first glass steel pad plate, the plate type glass steel sleeve ring and the second glass steel pad plate are all axial.

[0015] Further, a tank body for a refrigerated liquefied gas railway tank car comprises a shell and an inner container arranged in the shell, and a sandwich layer is formed between the shell and the inner container; the inner container comprises a first cylindrical section and first elliptical end covers arranged at two ends of the first cylindrical section; the shell comprises a second cylindrical section and second elliptical end covers arranged at two ends of the second cylindrical section;

[0016] A connecting rod is arranged between the inner container and the shell; the sandwich layer support structure for the tank body is arranged between the inner container and the shell;

[0017] A shell explosion-proof plug is arranged on the second cylindrical section; a vacuum measuring valve and a vacuumizing valve are arranged on the second elliptical end cover;

[0018] The filling and discharging system comprises a top filling pipe, a bottom filling and discharging pipe, a pressurizing pipe, an overflow pipe, a gas phase pipe and a diffusion pipe, one end of the top filling pipe, the bottom filling and discharging pipe, the pressurizing pipe, the overflow pipe and the gas phase pipe is communicated with the inner container, the other end of the top filling pipe, the bottom filling and discharging pipe, the pressurizing pipe and the gas phase pipe is sequentially penetrated through the inner container, the interlayer and the shell and is provided with a blind flange, one end of the diffusion pipe is communicated with the top filling pipe, the bottom filling and discharging pipe and the pressurizing pipe outside the shell, the other end of the overflow pipe and the diffusion pipe is communicated with the gas phase pipe.

[0019] The utility model disciously further includes the following technical features:

[0020] The manhole is arranged on the first elliptical head of the first cylindrical section.

[0021] The middle inner wall of the first cylindrical section is provided with an adsorbent chamber, and a first adsorbent is arranged in the adsorbent chamber.

[0022] A plurality of first reinforcing rings are arranged on the inner wall of the inner container at equal intervals in the axial direction; and second reinforcing rings are arranged on the inner wall of the shell at equal intervals in the axial direction.

[0023] An insulating layer is arranged on the outer wall of the inner container.

[0024] The inner walls of the two second cylindrical sections are provided with normal-temperature adsorbent chambers, and a second adsorbent is arranged in each normal-temperature adsorbent chamber.

[0025] One end of the overflow pipe is divided into two branches, one end of one branch is arranged at a rated filling rate of 84.2% of the inner container, and one end of the other branch is arranged at a rated filling rate of 95% of the inner container.

[0026] Compared with the prior art, the utility model has the beneficial technical effects that:

[0027] (I) In the utility model, the interlayer formed between the inner container and the shell is subjected to vacuumizing treatment, the cold insulation effect of the tank body is realized, the frozen liquefaction state of the gas in the tank is maintained, the volatilization rate of liquid oxygen is reduced, and the liquid oxygen transportation efficiency is improved, thereby solving the technical problem of low transportation efficiency caused by easy volatilization of liquid oxygen in the prior art.

[0028] (II) In the utility model, the pull rod and the interlayer support structure for the tank body are arranged between the inner container and the shell, the movement of the inner container relative to the shell is prevented, and the pull rod and the interlayer support structure for the tank body are both designed to have low thermal conductivity, thereby reducing the heat transfer between the inner container and the shell and solving the technical problem of relative displacement caused by different temperatures of the inner container and the shell in the prior art.

[0029] (III) The utility model discloses a medium charging and discharging system is arranged, so that the tank car has the medium charging and discharging function, in addition. There is a section of lifting structure in each pipeline in the charging and discharging system, so that the gas can always be kept above the liquid level, the purpose of gas sealing liquid is reached, the liquid penetration phenomenon between the inner container and the outer container is prevented, and the heat insulation performance of the container is ensured.

[0030] (IV) The shell explosion-proof plug 12 and the vacuum measuring valve 13 are arranged on the tank body of the utility model, the safety of liquid oxygen railway tank car transportation is improved, and the technical problem that the existing liquid oxygen transportation has dangerous phenomenon and makes the transportation efficiency low is solved.

[0031] (V) The utility model discloses the structure of fixed end is optimized in the interlayer support structure for tank body, adopts multilayer glass steel spare of stacking and prolongs heat conduction path and increases contact thermal resistance, adopts the stainless steel reinforcement of embedding and replaces glass steel spare and bears shear load, improves the carrying capacity of structure under the premise of not affecting the heat insulation performance, solves the technical problem that the existing technology cannot meet the heat insulation requirement and additional auxiliary device simultaneously and can meet the carrying requirement. DRAWINGS

[0032] Figure 1 It is the installation schematic drawing of the utility model on the tank body;

[0033] Figure 2 It is the structure schematic drawing of fixed end in Figure 1 ;

[0034] Figure 3 It is the explosion drawing of fixed end in Figure 1 ;

[0035] Figure 4 It is the longitudinal section view of fixed end in Figure 1 ;

[0036] Figure 5 It is the transverse section view of fixed end in Figure 1 ;

[0037] Figure 6 It is the cloth layer direction schematic drawing of pipe type glass steel sleeve ring in Figure 1 ;

[0038] Figure 7 It is the cloth layer direction schematic drawing of glass steel pad plate in Figure 1 ;

[0039] Figure 8 It is the cloth layer direction schematic drawing of plate type glass steel sleeve ring in Figure 1 ;

[0040] Figure 9 It is the section view schematic drawing of the tank body of the tank car for frozen liquefied gas railway in the utility model;

[0041] Figure 10 is a side view of a tank body for a refrigerated liquefied gas railway tank car.

[0042] The meanings of the various reference numbers in the figure are: sliding end 1, fixed end 2, outer shell 3, inner container 4; outer shell 3, inner container 4, interlayer 5, connecting rod 6, charging and discharging system 7, blind flange 8, manhole 9, adsorbent chamber 10, normal-temperature adsorbent chamber 11, outer shell explosion-proof plug 12, and vacuum measuring valve 13, vacuumizing valve 14;

[0043] outer shell support cover 201, inner container support cover 202, first glass fiber reinforced plastic gasket 203, first tubular glass fiber reinforced plastic collar 204, plate-shaped glass fiber reinforced plastic collar 205, second tubular glass fiber reinforced plastic collar 206, second glass fiber reinforced plastic gasket 207, stainless steel reinforcing member 208, rib plate 209, through hole 2010;

[0044] second cylindrical section 301, second elliptical head 302, second reinforcing ring 303;

[0045] first cylindrical section 401, first elliptical head 402, first reinforcing ring 403;

[0046] top filling pipe 701, bottom charging and discharging pipe 702, pressurizing pipe 703, overflow pipe 704, gas phase pipe 705, diffusing pipe 706.

[0047] The specific content of the utility model will be further explained and described in detail in combination with the embodiments below. DETAILED DESCRIPTION

[0048] It should be noted that all the parts in the utility model, in the absence of special instructions, adopt the parts known in the art.

[0049] The specific embodiments of the utility model are given below, and it should be noted that the utility model is not limited to the following specific embodiments, and any equivalent variations made on the basis of the technical solutions of the present application fall within the protection scope of the utility model.

[0050] The utility model gives a kind of interlayer support structure for tank body, as Figures 1-3 Tank body includes outer shell 3 and inner container 4, outer shell 3 and inner container 4 form interlayer, the axial front end of interlayer is provided with four sliding ends 1, and the axial rear end of interlayer is provided with four fixed ends 2;

[0051] The fixed end 2 comprises a shell support cover 201 connected with the inner wall of the shell 3 and an inner container support cover 202 connected with the outer wall of the inner container 4, the shell support cover 201 and the inner container support cover 202 are oppositely arranged, do not contact and form a first cavity, a composite support is arranged in the first cavity, the composite support comprises a first glass steel pad 203, a first tubular glass steel sleeve 204, a plurality of plate-shaped glass steel sleeves 205, a second tubular glass steel sleeve 206 and a second glass steel pad 207 arranged in sequence from bottom to top; the first glass steel pad 203, the first tubular glass steel sleeve 204, the plurality of plate-shaped glass steel sleeves 205, the second tubular glass steel sleeve 206 and the second glass steel pad 207 form a second cavity, and a stainless steel reinforcing part 208 is arranged in the second cavity.

[0052] In the above technical solution, the structure of the fixed end 1 is optimized, the multi-layer stacked glass steel parts are used to prolong the heat conduction path and increase the contact thermal resistance, and the embedded stainless steel reinforcing part is used to replace the glass steel part to bear the shear load, so that the load bearing capacity of the structure is improved without affecting the heat insulation performance, and the technical problem that the heat insulation requirement and the load bearing requirement cannot be met simultaneously without additional auxiliary devices in the prior art is solved.

[0053] In the above technical solution, the sliding end 1 and the fixed end 2 are arranged between the shell 3 and the inner container 4 of the tank body, the structure of the sliding end 1 in the present solution is the existing structure, that is, the sliding support assembly in Chinese patent CN201310503618.5 (inner and outer tank support structure), that is, it comprises an outer tank support cover fixedly arranged on the shell 3, an inner tank sliding support plate arranged on the inner container 4, and a glass steel support fixedly arranged in the outer tank support cover.

[0054] The sliding end 1 and the fixed end 2 are used to limit the transverse and vertical displacement of the inner container 4 relative to the shell 3, the sliding end 1 is used to fix the front end of the inner container 4, and the improved fixed end 2 is used to fix the rear end of the inner container, wherein the fixed end 2 has an assembly relationship with the composite support arranged in the inner container support cover 202, and cannot be longitudinally displaced, but the glass steel support contacts the inner tank sliding support plate on the inner container but is not fixed, and can slide longitudinally when the inner container 4 and the shell 3 are not synchronized in thermal expansion and cold contraction.

[0055] Referring to Figures 4-5 When bearing the vertical load, the load transmission path is: the inner container support cover 202 → the composite support → the shell support cover 201. Inside the composite support, there are two parallel load transmission paths:

[0056] Path one is: the first glass steel pad 203 → the first tubular glass steel sleeve 204 → the plate-shaped glass steel sleeve 205 → the second tubular glass steel sleeve 206 → the second glass steel pad 207;

[0057] Path two is: the first glass steel pad plate 203 → the stainless steel reinforcing part 208 → the second glass steel pad plate 207.

[0058] The stress area (i.e. the long circular area) of the composite support is more than twice the circular area of the traditional structure, and the loading direction of most glass steel parts is perpendicular to the layer direction, which has higher compression strength.

[0059] When bearing longitudinal load and tangential load, the load transmission path is: the shell support cover 201 → the first tubular glass steel ring 204 → the stainless steel reinforcing part 208 → the second tubular glass steel ring 206 → the content vessel support cover 202.

[0060] In this transmission path, the first tubular glass steel ring 204 and the second tubular glass steel ring 206 are only subjected to pressure and not subjected to shear, and the shear effect is borne by the stainless steel reinforcing part 208. In order to further improve the stress condition of the glass steel ring, the depth of the support cover is increased, thereby increasing the insertion depth of the glass steel ring.

[0061] Since the longitudinal load is greater than the tangential load, the composite support with a long circular cross section is arranged with the straight side perpendicular to the direction of the longitudinal load. When bearing longitudinal load, the stress area (i.e. the product of the projection length of the long circle and the insertion depth) is greatly increased compared with the traditional structure, and the loading direction of the glass steel ring (the direction of the force borne by the part) is perpendicular to the layer direction, which avoids crushing of the glass steel part. The glass steel ring and the stainless steel reinforcing part in the composite support adopt a transition fit, and the gap between the glass steel ring and the support cover is also strictly controlled, which can prevent impact when transmitting load.

[0062] The fixed end serves as a conductive heat bridge between the content vessel and the shell, and the heat transmission path is: the shell support cover 201 → the first glass steel pad plate 203 and the first tubular glass steel ring 204 → the stainless steel reinforcing part 208 and the plate-type glass steel ring 205 → the second tubular glass steel ring 206 and the second glass steel pad plate 207 → the content vessel support cover 202.

[0063] Due to the increased stress area when bearing load, the average heat conduction cross-sectional area in this path is increased compared with the traditional form, but the deepening of the support cover also lengthens the path, and the glass steel parts are reasonably arranged by taking advantage of the feature that the thermal conductivity coefficient of the epoxy glass steel pipe and plate material is smaller in the direction perpendicular to the layer direction. According to the calculation and verification results, it is shown that the heat conduction of the support in the utility model is basically the same as the traditional form. Moreover, in the traditional form, the glass steel support is a whole, and in the utility model, the composite support is adopted, and there is a certain contact thermal resistance between the glass steel parts and between the glass steel parts and the stainless steel reinforcing part. Since the resistance value cannot be quantified, it is not included in the calculation, and therefore the heat insulation performance of the fixed end support in the utility model can meet the requirements in actual application.

[0064] Wherein, when the tank is arranged on the vehicle, the longitudinal direction refers to the driving direction of the vehicle, i.e. parallel to the tank axis; the vertical direction refers to upward or downward; and the transverse direction refers to the direction perpendicular to the vertical and longitudinal directions, e.g. the direction of the swing when the vehicle swings left or right.

[0065] In the technical solution, according to the bearing and thermal insulation requirements of different media on their containers, the stainless steel reinforcing member 208 in the composite support member can be replaced by a non-metallic material with lower strength but larger thermal resistance when the bearing requirement is reduced and the thermal insulation requirement is increased.

[0066] In the technical solution, when the vertically loaded can be borne by the stacked glass steel sleeve rings alone, the height of the stainless steel reinforcing member 208 in the composite support member can be changed to be slightly lower than the height of the stacked sleeve rings, so as to ensure the shear capacity but not contact with the first and second glass steel base plates 203 and 207 at the same time, thereby cutting off part of the heat transfer path and further improving the thermal insulation performance.

[0067] The outer side wall of the shell support cover 201 is provided with two pairs of symmetrically distributed rib plates 209.

[0068] In the above technical solution, the shell support cover 201 protrudes out of the shell 3 by a certain height, which destroys the integrity of the shape of the shell 3, and the rib plates 209 can relieve the stress concentration at the structural mutation.

[0069] The stainless steel reinforcing member 208 is in transition fit with the second cavity.

[0070] In the above technical solution, the transition fit can well eliminate the gap between the stainless steel reinforcing member 208 and the first pipe-shaped glass steel sleeve ring 204, the plurality of plate-shaped glass steel sleeve rings 205 and the second pipe-shaped glass steel sleeve ring 206, and avoid impact.

[0071] The shell support cover 201 and the content support cover 202 are both long circular cylinders with one end open, and their interiors are cavities.

[0072] In the above technical solution, such a setting can increase the stress area of the composite support member to reduce the pressure. The original support member has a circular cross section, and increasing its diameter can also increase the stress area, but on the one hand, the longitudinal force is much larger than the transverse force, and on the other hand, the predetermined spacing of the reinforcing ring of the shell 3 also limits the increase range of the diameter of the composite support member. Therefore, the support member with different long circular cylinder in longitudinal and transverse directions is adopted, and the width direction is perpendicular to the direction of the longitudinal force.

[0073] Preferably, oval, rounded rectangle, etc. can also be used, which can also have the same effect.

[0074] The first glass steel pad plate 203, the first tubular glass steel collar 204 and the plate type glass steel collar 205 have the same outer edge shape, the first glass steel pad plate 203 has the same structure as the second glass steel pad plate 207, and the first tubular glass steel collar 204 has the same structure as the second tubular glass steel collar 206.

[0075] In the above technical solution, the arrangement can form a constraint for limiting the vertical and lateral displacement of the content container 4 relative to the shell 3, and the displacement tendency is generated by gravity and inertial force respectively. The gravity and the inertial force are balanced by the force perpendicular to the cross section of the composite support and the support reaction provided by the composite support, and the strength of the composite support meets the support requirement to stop the displacement tendency. When the composite support used in the technical solution plays the above role, the glass steel parts stacked in multiple layers are only subjected to pressure perpendicular to the plate surface, and the plate surface area meets the strength requirement. At the same time, the total height of the multiple layers of glass steel parts is the length of the heat transfer path, and the plate surface area of the glass steel parts is the cross-sectional area of the heat transfer path. From the heat insulation aspect, the longer the path length is, the better, and the smaller the cross-sectional area is, the better.

[0076] The stainless steel reinforcing member 208 is a long circular column, and a plurality of through holes 2010 are formed in the stainless steel reinforcing member 208.

[0077] In the above technical solution, the through holes 2010 are formed in the stainless steel reinforcing member 208 to reduce the heat transfer area. One to three through circular holes are formed, and the circular holes are arranged centrally or uniformly to avoid that the pipe wall is too thin at a certain position. The remaining cross-sectional area first meets the shear resistance requirement of the stainless steel reinforcing member, and secondly should be as small as possible to weaken the conduction heat flow.

[0078] The cross-sectional shape of the stainless steel reinforcing member 208 can be changed to a circular rectangular or an elliptical shape, and one or more large circular holes can be changed to small circular holes or special-shaped holes arranged in a strip grid or a grid.

[0079] The first tubular glass steel collar 204 and the second tubular glass steel collar 206 are arranged in the circumferential direction, and the first glass steel pad plate 203, the plate type glass steel collar 205 and the second glass steel pad plate 207 are arranged in the axial direction.

[0080] In the above technical solution, the glass fiber reinforced plastic has good strength and low thermal conductivity, and is a material with good performance for thermal insulation support. The glass fiber reinforced plastic is an anisotropic material, as shown in Table 1, and the different layer direction settings of the glass fiber reinforced plastic parts are to utilize the material properties to make the structure more suitable for the corresponding load working condition. When the glass fiber reinforced plastic parts are subjected to different loading directions (the direction of the force acting on the part), the mechanical properties are not the same. When the loading direction (the direction of the force acting on the part) is perpendicular to the layer direction, the compressive strength is high and the thermal conductivity is low. When the loading direction is parallel to the layer direction, the situation is just the opposite. The first tubular glass fiber reinforced plastic ring 204 and the second tubular glass fiber reinforced plastic ring 206 not only transmit the pressure in the plate surface direction, but also transmit the pressure generated by the longitudinal inertia force acting on the ring in the circumferential direction, so the layer direction is circumferential. The remaining glass fiber reinforced plastic parts only transmit the pressure in the plate surface direction, and occupy a large proportion in the heat transfer path, so the layer direction is axial.

[0081] Table 1 Physical and mechanical property indexes of epoxy glass fiber reinforced plastic pipe material for low temperature thermal insulation

[0082]

[0083] The utility model further provides a tank body for frozen liquefied gas railway tank car, including shell 3 and setting in the content container 4 in shell 3, and the interlayer 5 is formed between shell 3 and content container 4;Content container 4 includes first cylinder section 401 and sets up first oval end socket 402 at first cylinder section 401 both ends;

[0084] The connecting rod 6 is arranged between the content container 4 and the shell 3;The interlayer support structure for the tank body is arranged between the content container 4 and the shell 3;

[0085] The shell explosion-proof plug 12 is arranged on the second cylinder section 301;The vacuum measuring valve 13 and the vacuumizing valve 14 are arranged on the second oval end socket 302;

[0086] Also included is a charging and discharging system 7, which includes a top charging pipeline 701, a bottom charging and discharging pipeline 702, a pressurizing pipeline 703, an overflow pipeline 704, a gas phase pipeline 705, and a diffusion pipeline 706. The top charging pipeline 701, the bottom charging and discharging pipeline 702, the pressurizing pipeline 703, the overflow pipeline 704, and the gas phase pipeline 705 are all in communication with the inner container 4 at one end, and the other ends of the top charging pipeline 701, the bottom charging and discharging pipeline 702, the pressurizing pipeline 703, and the gas phase pipeline 705 all pass through the inner container 4, the interlayer 5, and the outer shell 3 in sequence and are provided with a blind flange 8 in common. The diffusion pipeline 706 is in communication with the top charging pipeline 701, the bottom charging and discharging pipeline 702, and the pressurizing pipeline 703 outside the outer shell 3 at one end, and the other ends of the overflow pipeline 704 and the diffusion pipeline 706 are in communication with the gas phase pipeline 705.

[0087] In the above technical solution, the interlayer between the inner container and the outer shell is subjected to vacuumizing treatment, so that the cold insulation effect of the tank body is achieved, the frozen liquefaction state of the gas in the tank is maintained, the volatilization rate of the liquid oxygen is reduced, the liquid oxygen transportation efficiency is improved, and the technical problem of low transportation efficiency caused by easy volatilization of the liquid oxygen in the prior art is solved.

[0088] By providing the pull rod and the interlayer support structure for the tank body between the inner container and the outer shell, the movement of the inner container relative to the outer shell is prevented, and the pull rod and the interlayer support structure for the tank body are both designed to have low thermal conductivity, thereby reducing the heat transfer between the inner container and the outer shell and solving the technical problem of relative displacement of the inner container and the outer shell caused by different temperatures of the inner container and the outer shell during tank car transportation in the prior art.

[0089] By providing the outer shell explosion-proof plug 12 and the vacuum measuring valve 13 on the tank body, the safety of the liquid oxygen railway tank car transportation is improved, and the technical problem of low transportation efficiency caused by dangerous phenomena existing in the liquid oxygen transportation in the prior art is solved.

[0090] By providing the charging and discharging system, the tank car has the medium charging and discharging function. In addition, one section of the lifting structure in each pipeline in the charging and discharging system allows the gas to always be above the liquid level, so as to achieve the purpose of gas sealing the liquid and prevent the liquid penetration phenomenon between the inner container and the outer container, thereby ensuring the heat insulation performance of the container.

[0091] Preferably, the length of the inner container 4 is 8210 mm, the inner diameter is 2800 mm, the nominal thickness of the first cylindrical section 401 is 10 mm, and the nominal thickness of the first oval head 402 is ≥ 11 mm. The design pressure of the inner container 4 is 0.8 MPa, and the working temperature is -182.9 ~ -154.4℃.

[0092] The material of the inner container 4 is 06Cr19Ni10, which is compatible with the liquid oxygen medium and can ensure the safe storage and transportation of the liquid oxygen medium.

[0093] The length of the shell 3 is 8725mm, the outer diameter is 3062mm, the nominal thickness of the second cylindrical segment 301 is 5mm, and the nominal thickness of the second elliptical head 302 is ≥9mm.

[0094] Preferably, the material of the shell is 16MnDR.

[0095] The design pressure of the interlayer 5 is -0.1MPa, and the working temperature is -40~+50℃.

[0096] In the above technical solution, the railway tank body provided with the inner container 4 has a large transportation capacity, a high transportation speed, a high transportation efficiency, a small influence of adverse weather such as heavy fog and snow, a safe and reliable transportation process, can guarantee the stability of the tank body, and has a strong supply capacity.

[0097] A manhole 9 is arranged on the first elliptical head 402 located at the axial front end of the first cylindrical segment 401.

[0098] In the above technical solution, the manhole 9 is a through hole for passing people during manufacturing, and is only used during manufacturing. After the tank car is completed, it does not work.

[0099] A sorbent chamber 10 is arranged on the inner wall of the middle part of the first cylindrical segment 401, and a first sorbent is arranged in the sorbent chamber 10.

[0100] In the above technical solution, the first sorbent is arranged to maintain the high vacuum state of the inner container 4.

[0101] Preferably, the first sorbent is 5A molecular sieve and 13X molecular sieve.

[0102] A plurality of first reinforcing rings 403 are arranged on the inner wall of the inner container 4 at equal intervals in the axial direction, and a second reinforcing ring 303 is arranged on the inner wall of the shell 3 at equal intervals in the axial direction.

[0103] In the above technical solution, the first reinforcing ring 403 is arranged to make the structure of the inner container 4 more stable, and the second reinforcing ring 303 is arranged to make the structure of the shell 3 more stable.

[0104] Preferably, four first reinforcing rings 403 and four second reinforcing rings 303 are arranged.

[0105] An insulating layer is arranged on the outer wall of the inner container 4.

[0106] In the above technical solution, the insulating layer reduces the thermal conductivity of the inner container 4 and improves the heat insulation performance of the inner container 4.

[0107] Preferably, the insulating layer is an insulating material composed of aluminum foil and glass fiber paper, and the thickness is 25mm.

[0108] The inner wall of the two second cylinder segments 301 is provided with a normal temperature adsorbent chamber 11, and the normal temperature adsorbent chamber 11 is provided with a second adsorbent.

[0109] In the above technical solution, the second adsorbent is arranged to maintain the high vacuum state of the interlayer 5, thereby prolonging the service life of the tank.

[0110] Preferably, the adsorbent is Ag400.

[0111] One end of the overflow pipeline 704 is divided into two paths, one end of which is arranged at the rated fullness rate 84.2% of the inner container 4, and the other end is arranged at the rated fullness rate 95% of the inner container 4.

[0112] In the above technical solution, the overflow pipeline 704 is used during filling to indicate that the liquid in the tank has reached the set fullness rate.

Claims

1. A tank body for railway tank cars used for refrigerated liquefied gases, characterized in that, The device includes an outer shell (3) and an inner container (4) disposed within the outer shell (3), with a sandwich (5) formed between the outer shell (3) and the inner container (4); the inner container (4) includes a first cylindrical section (401) and first elliptical end caps (402) disposed at both ends of the first cylindrical section (401); the outer shell (3) includes a second cylindrical section (301) and second elliptical end caps (302) disposed at both ends of the second cylindrical section (301). A connecting rod (6) is provided between the inner container (4) and the outer shell (3); the sandwich support structure for the tank body is provided between the inner container (4) and the outer shell (3); The sandwich support structure for the tank body includes a sandwich formed between the outer shell (3) and the inner container (4), with four sliding ends (1) provided at the axial front end of the sandwich and four fixed ends (2) provided at the axial rear end of the sandwich. The fixed end (2) includes an outer shell support cover (201) connected to the inner wall of the outer shell (3) and an inner container support cover (202) connected to the outer wall of the inner container (4). The outer shell support cover (201) and the inner container support cover (202) are arranged opposite to each other, do not contact each other, and form a first cavity. A composite support member is provided in the first cavity. The composite support member includes, from bottom to top, a first fiberglass pad (203), a first tubular fiberglass collar (204), multiple plate-shaped fiberglass collars (205), a second tubular fiberglass collar (206), and a second fiberglass pad (207). The first fiberglass pad (203), the first tubular fiberglass collar (204), the multiple plate-shaped fiberglass collars (205), the second tubular fiberglass collar (206), and the second fiberglass pad (207) form a second cavity. A stainless steel reinforcing member (208) is provided in the second cavity. The second cylindrical section (301) is provided with an explosion-proof plug (12); the second elliptical head (302) is provided with a vacuum measuring valve (13) and a vacuum valve (14). It also includes a filling and discharging system (7), which includes a top filling pipeline (701), a bottom filling and discharging pipeline (702), a pressurizing pipeline (703), an overflow pipeline (704), a gas phase pipeline (705), and a venting pipeline (706). One end of each of the top filling pipeline (701), bottom filling and discharging pipeline (702), pressurizing pipeline (703), overflow pipeline (704), and gas phase pipeline (705) is connected to the inner container (4). The top filling pipeline (701), bottom filling and discharging pipeline (702), pressurizing pipeline (703), overflow pipeline (704), and gas phase pipeline (705) are connected to the inner container (4). The other ends of the filling and draining pipeline (702), the pressurizing pipeline (703), and the gas phase pipeline (705) all pass through the inner container (4), the interlayer (5), and the outer shell (3) in sequence and are all provided with blind flanges (8). One end of the venting pipeline (706) is connected to the top filling pipeline (701), the bottom filling and draining pipeline (702), and the pressurizing pipeline (703) located outside the outer shell (3). The other ends of the overflow pipeline (704) and the venting pipeline (706) are connected to the gas phase pipeline (705).

2. The tank body for refrigerated liquefied gas railway tank cars as described in claim 1, characterized in that, Two pairs of symmetrically distributed ribs (209) are provided on the outer side wall of the outer shell support cover (201).

3. The tank body for refrigerated liquefied gas railway tank cars as described in claim 1, characterized in that, The stainless steel reinforcing member (208) and the second cavity are in a transition fit.

4. The tank body for refrigerated liquefied gas railway tank cars as described in claim 1, characterized in that, Both the outer shell support cover (201) and the inner container support cover (202) are elongated cylindrical bodies with an open end face and a hollow interior.

5. The tank body for refrigerated liquefied gas railway tank cars as described in claim 1, characterized in that, The outer edges of the first fiberglass pad (203), the first tubular fiberglass collar (204), and the plate fiberglass collar (205) are the same. The first fiberglass pad (203) and the second fiberglass pad (207) have the same structure. The first tubular fiberglass collar (204) and the second tubular fiberglass collar (206) have the same structure.

6. The tank body for refrigerated liquefied gas railway tank cars as described in claim 1, characterized in that, The stainless steel reinforcing member (208) is an elongated cylindrical body with multiple through holes (2010) distributed along the axial direction.

7. The tank body for refrigerated liquefied gas railway tank cars as described in claim 1, characterized in that, The first tubular fiberglass collar (204) and the second tubular fiberglass collar (206) are laid in the circumferential direction, while the first fiberglass pad (203), the plate-shaped fiberglass collar (205), and the second fiberglass pad (207) are laid in the axial direction.

8. The tank body for refrigerated liquefied gas railway tank cars as described in claim 1, characterized in that, A manhole (9) is provided on the first elliptical end cap (402) located at the axial front end of the first cylindrical section (401).

9. The tank body for refrigerated liquefied gas railway tank cars as described in claim 1, characterized in that, An adsorbent chamber (10) is provided on the inner wall of the middle part of the first cylindrical section (401), and an adsorbent of the first type is provided in the adsorbent chamber (10).

10. The tank body for refrigerated liquefied gas railway tank cars as described in claim 1, characterized in that, Multiple first reinforcing rings (403) are provided at equal intervals along the axial direction on the inner wall of the inner container (4); and second reinforcing rings (303) are provided at equal intervals along the axial direction on the inner wall of the outer shell (3).

11. The tank body for refrigerated liquefied gas railway tank cars as described in claim 1, characterized in that, An insulation layer is provided on the outer wall of the inner container (4).

12. The tank body for refrigerated liquefied gas railway tank cars as described in claim 1, characterized in that, The inner walls of the two second cylindrical sections (301) are provided with room temperature adsorbent chambers (11), and the room temperature adsorbent chambers (11) are provided with adsorbent No.

2.

13. The tank body for refrigerated liquefied gas railway tank cars as described in claim 1, characterized in that, The overflow pipe (704) is divided into two paths at one end, one end is set at the rated filling rate of the inner container (4) at 84.2%, and the other end is set at the rated filling rate of the inner container (4) at 95%.

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