A large-volume cryogenic vacuum storage and transportation tank truck and its auxiliary support unit

Abstract

The present invention relates to a large-volume cryogenic vacuum storage tank truck and its auxiliary support unit. The purpose of the present invention is to solve the technical problems that fatigue cracks are prone to occur at the connection position between the support structure and the inner and outer tank bodies of the existing large-volume cryogenic vacuum storage tank trucks, or the support structure is prone to failure, resulting in contact collision between the inner and outer tank bodies, thereby causing the inner tank body, the inner tank body winding layer and the sandwich pipeline system between the inner and outer tank bodies to be damaged. The auxiliary support unit includes a connecting sleeve fixedly connected to the outer tank body and a connecting shaft fixedly connected to the inner tank body; the connecting sleeve includes a supporting cylinder, a cover plate fixedly connected and sealed on the supporting cylinder, and a first sleeve, a heat insulation plate, a second sleeve, an annular heat insulation member and a connecting shaft sleeve arranged in the supporting cylinder. A horizontal auxiliary support assembly U, two longitudinal auxiliary support assemblies V and four vertical support assemblies W are arranged between the outer tank body and the inner tank body of the tank truck, and the seven together form a seven-point support structure.

Description

Technical Field

[0001] The invention relates to a storage and transportation container tank truck, in particular to a large-capacity low-temperature vacuum storage and transportation tank truck and an auxiliary supporting unit thereof. Background Art

[0002] Large-volume cryogenic vacuum storage and transportation tank cars mainly include large-volume cryogenic liquid railway tank cars and large-volume cryogenic liquid road tank cars. The cryogenic container of the tank car includes an inner tank body and an outer tank body, both of which are composed of a cylinder body and a head located at both ends of the cylinder body.

[0003] The existing cryogenic storage and transportation containers for cryogenic liquid railway transportation, such as the tank structure of 85m3 liquid hydrogen railway transportation filling and transportation vehicles, have a cross-rod support structure installed at the barrel of the inner and outer tanks. In addition, a longitudinal tie rod structure is installed at the end of the inner and outer tanks. The cross-rod support structure installed at the barrel limits the relative displacement of the inner and outer tanks in the lateral and vertical directions, and the longitudinal tie rod structure installed at the end of the head limits the longitudinal relative displacement of the inner and outer tanks. The disadvantages of this support structure are: during installation, it is necessary to process the installation holes of the cross support rods on the inner tank body, and a large number of installation holes need to be processed, which greatly damages the integrity of the inner tank body structure and brings great difficulties to the assembly and welding of the inner and outer tank bodies. In addition, since there are many welds connecting the installation holes of the inner tank body and the cross support rods, and the positions of the welds are not ordinary conventional positions, the difficulty and workload of flaw detection are increased, which correspondingly increases the production cost and reduces the production efficiency. The welding position between the inner tank body and the support structure is a discontinuous structure and lacks a corresponding temperature compensation structure, so there is a peak stress. The cross-rod support structure constrains the thermal expansion and contraction deformation of the inner tank body along the radial direction during the loading and unloading process along the axial direction of the cross rod. Fatigue cracks are easily generated at this location during repeated loading and unloading (thermal expansion and contraction of the inner tank body), and there is a risk of causing the tank body to fail.

[0004] Existing low-temperature liquid road tank trucks, such as 300m3 liquid hydrogen transport tank trucks, use 4 support leg support structures between the inner and outer tank bodies, plus 3 auxiliary support support structures. Among them, the 4 support leg support structures bear the vertical gravity load of the inner tank body and the cargo loaded therein, one of the 3 auxiliary supports is arranged at the upper part of the tank body, and the other two auxiliary supports are arranged at the lower part of the tank body, and the 3 auxiliary supports jointly bear the impact load of the inner tank body and the cargo carried therein in the lateral direction and the impact load in the longitudinal direction. The disadvantage of this tank truck is that once the tank truck overturns during transportation, its support leg support structure is prone to failure, causing a contact collision between the inner and outer tank bodies of the tank truck, which in turn causes the inner tank body, the inner tank body winding layer, and the sandwich pipe system between the inner and outer tank bodies to be destroyed. The arrangement of the support structure between the inner and outer tank bodies of the tank truck is only suitable for slow travel at low speeds on roads, and is not suitable for operation on railways. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problems that fatigue cracks are prone to occur at the connection positions between the support structure and the inner and outer tank bodies of existing large-volume cryogenic vacuum storage and transportation tank trucks, or the support structure is prone to failure, resulting in contact collision between the inner and outer tank bodies, which in turn causes damage to the inner tank body, the inner tank body winding layer, and the interlayer pipeline system between the inner and outer tank bodies. A large-volume cryogenic vacuum storage and transportation tank truck and its auxiliary support unit are provided.

[0006] To solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0007] The present invention provides an auxiliary support unit for a large-volume cryogenic vacuum storage tank vehicle, which is special in that:

[0008] It includes a connecting sleeve fixedly connected to the outer tank body of the low-temperature vacuum storage tank truck and a connecting shaft fixedly connected to the inner tank body of the low-temperature vacuum storage tank truck;

[0009] The connecting sleeve includes a supporting cylinder fixedly connected to the outer tank body, a cover plate fixedly connected and sealed to the end of the supporting cylinder away from the inner tank body, and a first sleeve, a heat insulation plate, a second sleeve, an annular heat insulation member and a connecting sleeve arranged in the supporting cylinder body;

[0010] One end of the first sleeve contacts the cover plate, the other end of the first sleeve contacts one side surface of the heat insulation plate, the other side surface of the heat insulation plate contacts one end of the second sleeve, and the other end of the second sleeve contacts one side surface of the outer circle of the annular heat insulation member; a flange is provided on the outer side of the connecting sleeve close to one end of the inner tank body, and the flange presses against the end surface of the inner circle of the annular heat insulation member close to one side of the inner tank body; the other end surface of the inner circle of the annular heat insulation member is fixedly connected to a first pressure strip, and the first pressure strip is fixedly connected to the side surface of the connecting sleeve; the end surface of the outer circle of the annular heat insulation member is fixedly connected to a second pressure strip, and the second pressure strip is fixedly connected to the side surface of the support cylinder close to one end of the inner tank body;

[0011] The connecting shaft is inserted into the matching hole of the connecting sleeve.

[0012] Furthermore, the length of the end surface p of the connecting shaft on the side facing the outer tank body beyond the end surface q of the connecting sleeve on the side is D, and D can be calculated by the following formula:

[0013] D=L·M%·K

[0014] in,

[0015] L is the axial length of the inner tank, in mm;

[0016] M is the shrinkage rate of the inner tank material;

[0017] K is the anti-fall safety factor, 1≤K≤1.5.

[0018] Furthermore, the annular heat insulating member is evenly distributed with a plurality of through holes.

[0019] Furthermore, the insulation board and the annular insulation member are both made of fiberglass.

[0020] The present invention also provides a large-volume low-temperature vacuum storage and transportation tank truck, comprising an outer tank body, an inner tank body and a bottom frame, and four height adjustment members arranged on the bottom frame and located below the outer tank body, the special features of which are:

[0021] It also includes an auxiliary support assembly disposed between the outer tank body and the inner tank body; the auxiliary support assembly includes one horizontal auxiliary support assembly U, two longitudinal auxiliary support assemblies V and four vertical support assemblies W, which together form a seven-point support structure;

[0022] The lateral auxiliary support assembly U adopts the above-mentioned auxiliary support unit, and its support cylinder is fixedly connected to the center of the end cap of the outer tank body, and its connecting shaft is fixedly connected to the center of the end cap of the inner tank body; the matching hole of the connecting shaft sleeve adopts an oblong hole, and the long diameter direction of the oblong hole is perpendicular to the bottom frame of the low-temperature vacuum storage tank truck;

[0023] The two longitudinal auxiliary support assemblies V adopt the above-mentioned auxiliary support unit, the two support cylinders are respectively fixedly connected to the highest position and the lowest position of the cylinder near the head at the other end of the outer tank body, and the two connecting shafts are fixedly connected to the inner tank body at positions opposite to the two connecting sleeves, and the matching holes of the connecting sleeves adopt through holes adapted to the shape of the connecting shafts;

[0024] Each of the vertical support components W is arranged between the inner tank body, the outer tank body and a height adjustment member.

[0025] Furthermore, two reinforcement rings are provided on the inner wall of the inner tank body along the circumferential direction, the two reinforcement rings are located on both sides of the connecting shaft of the longitudinal auxiliary support assembly V, and the two reinforcement rings are connected to the connecting shaft through a first reinforcement rib plate;

[0026] Four second reinforcing ribs are evenly distributed along the circumference at the outer wall of the support cylinder of the longitudinal auxiliary support assembly V on the outer wall of the outer tank body, two of which are arranged along the axial direction of the outer tank body, and the other two are arranged along the circumferential direction of the outer tank body.

[0027] Furthermore, two third reinforcing ribs are radially arranged at the outer wall of the supporting cylinder of the transverse auxiliary supporting assembly U on the outer wall of the outer tank, and the two third reinforcing ribs are parallel to the plane of the tank truck chassis;

[0028] At the connection axis of the transverse auxiliary support assembly U on the inner wall of the inner tank body, four fourth reinforcing ribs are evenly distributed along the circumference, two of which are arranged in the horizontal direction and the other two are arranged in the vertical direction.

[0029] Furthermore, the connecting shaft, supporting cylinder, cover plate, first sleeve, second sleeve, connecting shaft sleeve, first pressure strip and second pressure strip, as well as the first reinforcing rib plate, second reinforcing rib plate, third reinforcing rib plate, fourth reinforcing rib plate and reinforcing ring are all consistent with the material of the inner tank body, which is austenitic stainless steel.

[0030] Further, the vertical support assembly W includes an upper ball joint unit, a lower ball joint unit, a support rod, a protective tube and a bottom sealing plate;

[0031] The upper ball joint unit and the lower ball joint unit have the same structure, and both include a support base, a joint ball body, a joint body, an anti-drop pin, a base end cover and a fixing bolt;

[0032] The interior of the support base is a spherical space a, and the inner side surface of the base end cover is a spherical surface b, and the two cooperate to form a closed spherical inner cavity. The hinge ball is arranged in the spherical inner cavity to form a spherical kinematic pair c, and a gap is provided between the hinge ball and the spherical inner cavity;

[0033] The side wall of the support base is provided with a first through hole d connected to the spherical inner cavity, and the first through hole d adopts a chamfered structure, which means that the outer opening diameter of the first through hole d is larger than the inner opening diameter; the hinge spherical body is provided with a blind hole e and a second through hole f which are perpendicular to each other and pass through the center of the spherical body; one end of the joint body is provided with a third through hole g in the radial direction; the end of the joint body provided with the third through hole g passes through the first through hole d and is inserted into the blind hole e;

[0034] The outer diameter of the anti-drop pin is smaller than the second through hole f and the third through hole g, and the anti-drop pin is inserted into the second through hole f and the third through hole g from one side of the base end cover to fix the joint body and the hinge ball body together; the support base and the base end cover are fastened by the fixing bolt;

[0035] The support rod passes through a through hole provided on the outer tank body to be supported, and a gap is left between the support rod and the outer tank body, and its two ends are respectively fixedly connected to the other ends of the joint bodies of the upper ball joint unit and the lower ball joint unit; the support base of the upper ball joint unit is fixedly connected to the outer surface of the inner tank body through the support ear seat; the bottom sealing plate is fixedly arranged on the height adjustment member 38 of the tank truck chassis, and the support base of the lower ball joint unit is fixedly connected to the bottom sealing plate;

[0036] The protective tube includes an upper protective tube and a lower protective tube. The upper end of the upper protective tube is fixedly connected to the surface of the outer tank body, the lower end of the upper protective tube is fixedly connected to the upper end of the lower protective tube, and the lower end of the lower protective tube is fixedly connected to the surrounding area of ​​the lower ball joint unit of the bottom sealing plate. The outer tank body surface, the upper protective tube, the lower protective tube, and the bottom sealing plate constitute a sealed cavity.

[0037] Further, in the lateral auxiliary support assembly U, the center height of the oblong hole is lower than the height of the axis of the connecting shaft;

[0038] The long diameter Z of the oblong hole is obtained by the following formula:

[0039] Z≥H·G%·N+Φ

[0040] in:

[0041] H is the clear height of the vertical support assembly W, in mm;

[0042] G is the shrinkage rate of the material of the support rod;

[0043] N is the anti-interference safety factor of the connecting shaft between the oblong hole of the connecting sleeve and the lateral auxiliary support assembly U;

[0044] Φ is the outer diameter of the connecting shaft of the lateral auxiliary support assembly U, in mm.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1. The large-volume cryogenic vacuum storage tanker and its auxiliary support unit provided by the present invention include an auxiliary support assembly including a transverse auxiliary support assembly U, two longitudinal auxiliary support assemblies V and four vertical support assemblies W. The seven-point support formed by the seven-point support realizes the fixation of the relative position between the inner tank body and the outer tank body. The points of the seven-point support work together to constrain the relative movement of the inner tank body relative to the outer tank body, thereby realizing the reliable fixation of the position of the inner tank body relative to the outer tank body, so that the temperature of the medium loaded by the large-volume cryogenic vacuum storage tanker can be as low as -253°C or below, thereby effectively solving the existing 300m 3 The tank structure of liquid hydrogen transport tank cars is not suitable for operation on railways, especially for fast operation.

[0047] 2. The large-volume cryogenic vacuum storage tanker and its auxiliary support unit provided by the present invention adopts a transverse auxiliary support assembly U to bear the transverse load of the inner tank body, and the transverse load is transferred from the inner tank body to the weld position of the outer tank body and the supporting cylinder. Two longitudinal auxiliary support assemblies V are used to bear the transverse load and longitudinal load of the inner tank body, and these two loads are transferred from the inner tank body to the weld position where the outer tank body and the supporting cylinder are connected. The three points formed by the transverse auxiliary support assembly U and the two longitudinal auxiliary support assemblies V at their respective positions determine a plane. The point where the transverse auxiliary support assembly U is located in the plane formed by the three points is located at the center of the head. The two longitudinal auxiliary support assemblies V are respectively arranged at the highest position and the lowest position of the cylinder near the head at the other end of the tank body, which limits the movement of the inner tank body relative to the outer tank body in the transverse and longitudinal directions and the rotation of the inner tank body around the axis of the outer tank body. A vertical support assembly W is used to bear the movement of the inner tank body relative to the outer tank body in the vertical direction.

[0048] 3. The large-volume cryogenic vacuum storage and transportation tank truck and its auxiliary support unit provided by the present invention, the transverse auxiliary support assembly U is installed at the center position of the end head of the tank body. This installation position can effectively improve the stress condition of the transverse auxiliary support components of the inner and outer tank bodies during the railway transportation of the large-volume cryogenic storage and transportation container, especially when the railway transportation passes through a curve, thereby ensuring that the stress at the connection position of the inner and outer tank bodies of the large-volume cryogenic storage and transportation container and the 7-point support structure is uniform, so that the large-volume cryogenic storage and transportation container is sufficiently safe and reliable during railway transportation.

[0049] 4. The large-volume cryogenic vacuum storage and transportation tank truck and its auxiliary support unit provided by the present invention adopt a vertical support assembly W with ball joints at both ends, which can maintain a certain distance between the outer wall of the inner tank body and the inner wall of the outer tank body, effectively preventing the inner and outer tank bodies of the large-volume cryogenic storage and transportation container from colliding and contacting when the large-volume cryogenic storage and transportation container overturns during transportation, thereby avoiding the problem of damage to the inner tank body, the inner tank body winding layer, and the interlayer piping system between the inner and outer tank bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a schematic structural diagram of a large-volume cryogenic vacuum storage and transportation tank truck of the present invention;

[0051] Figure 2 This is a schematic diagram of the structure of a large-volume cryogenic vacuum storage and transportation tanker of the present invention, in which some details have been cut away;

[0052] Figure 3 It is a schematic structural diagram of the cross section of the lateral auxiliary support assembly U in the present invention in the main viewing direction;

[0053] Figure 4 for Figure 3 A partial enlarged view of the circled portion, in which the annular heat insulation member is omitted;

[0054] Figure 5 It is a schematic diagram of the structure of the cross-section of the lateral auxiliary support assembly U in the present invention in a top view;

[0055] Figure 6 It is a schematic structural diagram of the main view cross section of the longitudinal auxiliary support assembly V in the present invention;

[0056] Figure 7 It is a schematic structural diagram of the annular heat insulation member in the auxiliary support assembly of the present invention;

[0057] Figure 8 It is a schematic structural diagram of the cross section of the vertical support assembly W in the main viewing direction in the present invention;

[0058] Fig. 9 It is a cross-sectional view of the upper ball joint unit of the vertical support assembly W in the present invention;

[0059] Fig.10 It is a schematic diagram of the structure of the vertical support assembly W after the support base and the base end cover cooperate with each other in the present invention;

[0060] Fig.11 It is a schematic structural diagram of the anti-drop pin of the vertical support assembly W in the present invention;

[0061] Fig.12 It is a schematic structural diagram of the vertical support assembly W in the present invention;

[0062] Description of reference numerals:

[0063] 1-upper ball joint unit, 2-lower ball joint unit, 3-support rod, 4-protective tube, 5-bottom sealing plate, 6-support base, 7-hinge ball, 8-joint body, 9-anti-drop pin, 10-base end cover, 11-fixing bolt, 12-outer tank body, 13-inner tank body, 14-upper protective tube, 15-lower protective tube 20-support ear seat;

[0064] 21-support cylinder, 22-cover plate, 23-first sleeve, 24-heat insulation board, 25-second sleeve, 26-annular heat insulation member, 27-connecting sleeve, 28-first pressure strip, 29-second pressure strip, 30-through hole, 31-connecting shaft, 32-long circular hole, 33-reinforcement ring, 34-first reinforcing rib plate, 35-second reinforcing rib plate, 36-third reinforcing rib plate, 37-fourth reinforcing rib plate, 38-height adjustment member. DETAILED DESCRIPTION

[0065] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0066] The present invention provides an auxiliary support unit for a large-volume cryogenic vacuum storage tank vehicle, such as Figures 3 to 7 As shown, it includes a connecting sleeve fixedly connected to the outer tank body 12 of the low-temperature vacuum storage tank truck and a connecting shaft 31 fixedly connected to the inner tank body 13 of the low-temperature vacuum storage tank truck; the connecting sleeve includes a supporting cylinder 21 fixedly connected to the outer tank body 12, a cover plate 22 fixedly connected and sealed to the end of the supporting cylinder 21 away from the inner tank body 13, and a first sleeve 23, a heat insulation board 24, a second sleeve 25, an annular heat insulation member 26 and a connecting shaft sleeve 27 arranged in the supporting cylinder 21; the heat insulation board 24 and the annular heat insulation member 26 are made of glass fiber reinforced plastics; one end of the first sleeve 23 contacts with the cover plate 22, and the other end contacts with one side surface of the heat insulation board 24, the other side surface of the heat insulation board 24 contacts with one end of the second sleeve 25, and the other end of the second sleeve 25 contacts with the annular heat insulation member 2 6; the inner and outer sides of the connecting sleeve 27 near the end of the inner tank body 13 are provided with flanges, and the inner side flange can reduce the contact area with the connecting shaft 31, thereby reducing the heat leakage, and the outer flange is pressed against the end face of the inner circle of the annular heat insulating member 26 near the inner tank body 13; the other end face of the inner circle of the annular heat insulating member 26 is fixedly connected with a first pressure strip 28, and the first pressure strip 28 is fixedly connected to the side face of the connecting sleeve 27; the end face of the outer circle of the annular heat insulating member 26 is fixedly connected with a second pressure strip 29, and the second pressure strip 29 is fixedly connected to the side face of the support cylinder 21 near the end of the inner tank body 13; the annular heat insulating member 26 is evenly distributed with a plurality of through holes 30, which can effectively reduce the conduction of heat; the connecting shaft 31 is inserted into the matching hole of the connecting sleeve 27.

[0067] If a large-volume cryogenic storage and transportation container is loaded and unloaded during cryogenic liquid, the inner tank body 13 will be longitudinally stretched or contracted relative to the outer tank body 12. The length of the end surface p of the connecting shaft 31 facing the outer tank body 12 exceeding the end surface q of the connecting shaft sleeve 27 on the side is D, and D can be calculated by the following formula:

[0068] D=L·M%·K

[0069] in,

[0070] L is the axial length of the inner tank body 13, in mm;

[0071] M is the shrinkage rate of the material of the inner tank body 13;

[0072] K is the anti-fall safety factor, 1≤K≤1.5.

[0073] Its main function is: when the inner tank body 13 shrinks and deforms under the working condition of charging low-temperature liquid, the connecting shaft 31 will not separate from the connecting shaft sleeve 27; at the same time, the inner tank body 13 shrinks and deforms after being loaded with low-temperature liquid, thereby causing the inner tank body 13 to move along the axis of the tank body.

[0074] The present invention also provides a large-capacity low-temperature vacuum storage and transportation tanker, such as Figures 1 to 12 As shown, the temperature of the medium loaded therein can be as low as -253°C or below, and the tank comprises an outer tank body 12, an inner tank body 13 and a base frame, as well as four height adjustment members 38 arranged on the base frame and located below the outer tank body 12. An auxiliary support assembly is arranged between the outer tank body 12 and the inner tank body 13; the auxiliary support assembly comprises one transverse auxiliary support assembly U, two longitudinal auxiliary support assemblies V and four vertical support assemblies W. The seven-point support structure works together to constrain the relative movement of the inner tank body 13 relative to the outer tank body 12, thereby achieving the fixation of the relative position between the inner tank body 13 and the outer tank body 12.

[0075] The transverse auxiliary support assembly U adopts the above-mentioned auxiliary support unit, and its support cylinder 21 is fixedly connected to the center of the head at one end of the outer tank body 12, and its connecting shaft 31 is fixedly connected to the center of the head of the inner tank body 13 at this end; the matching hole of the connecting sleeve 27 adopts an oblong hole 32, and the long diameter direction of the oblong hole 32 is perpendicular to the chassis of the low-temperature vacuum storage tank truck; the center height of the oblong hole 32 of the connecting sleeve 27 is lower than the height of the axis of the connecting shaft 31; the transverse auxiliary support assembly U has the function of bearing the lateral load of the inner tank body 13, and the lateral load is transmitted from the inner tank body 13 to the weld position between the outer tank body 12 and the support cylinder 21.

[0076] The two longitudinal auxiliary support assemblies V both adopt the above-mentioned auxiliary support unit, and the two support cylinders 21 are respectively fixedly connected to the highest position and the lowest position of the cylinder near the head at the other end of the outer tank body 12, and these two positions are symmetrical about the horizontal center plane of the cylinder of the outer tank body 12. The two connecting shafts 31 are fixedly connected to the inner tank body 13 at positions opposite to the two connecting sleeves 27, and the matching holes of the connecting sleeves 27 adopt through holes that are adapted to the shape of the connecting shafts 31, so that the two connecting shafts 31 are concentrically assembled with the connecting sleeves 27; the two longitudinal auxiliary support assemblies V have the function of bearing the lateral load and the longitudinal load of the inner tank body 13, and these two loads are finally transmitted from the inner tank body 13 to the weld position where the outer tank body 12 and the support cylinder 31 are connected.

[0077] The transverse auxiliary support assembly U and the two longitudinal auxiliary support assemblies V form three points at their respective positions, and these three points determine a plane. The point where the transverse auxiliary support assembly U is located is located at the center of the head. This plane limits the transverse movement of the inner tank body 13 relative to the outer tank body 12 and the rotation of the inner tank body 13 around the axis of the outer tank body 12.

[0078] Each of the vertical support assemblies W is disposed between the inner tank body 13 and the outer tank body 12 and a height adjustment member 38 , and supports the movement of the inner tank body 13 relative to the outer tank body 12 in the vertical direction.

[0079] The connecting shafts 31 of the two longitudinal auxiliary support assemblies V can move up and down in the vertical direction along the inner surface of the connecting sleeve 27, so that the two longitudinal auxiliary support assemblies V assist the vertical support assembly W in moving in the vertical direction.

[0080] Two reinforcement rings 33 are provided on the inner wall of the inner tank body 13 along the circumferential direction. The two reinforcement rings 33 are located on both sides of the connecting shaft 31 of the longitudinal auxiliary support assembly V. The two reinforcement rings 33 are connected to the connecting shaft 31 through a first reinforcement rib plate 34, thereby enhancing the connection shaft 31 to resist the stress deformation caused by the lateral load and the longitudinal load of the inner tank body 13, and protecting the assembly weld between the connecting shaft 31 and the inner tank body 13; on the outer wall of the support cylinder 21 of the longitudinal auxiliary support assembly V on the outer wall of the outer tank body 12, four second reinforcement rib plates 35 are evenly distributed along the circumference, two of which are arranged along the axial direction of the outer tank body 12, and the other two are arranged along the circumferential direction of the outer tank body 12. The four second reinforcement rib plates 35 can effectively improve the stress condition at the connection weld between the outer tank body 12 and the support cylinder 21.

[0081] At the outer wall of the support cylinder 21 of the transverse auxiliary support assembly U on the outer wall of the outer tank body 12, two third reinforcing ribs 36 are radially arranged, and the two third reinforcing ribs 36 are parallel to the plane of the tank truck chassis. The arrangement of the two third reinforcing ribs 36 can effectively improve the stress condition of the weld position between the outer tank body 12 and the support cylinder 21. At the connecting shaft 31 of the transverse auxiliary support assembly U on the inner wall of the inner tank body 13, four fourth reinforcing ribs 37 are evenly distributed along the circumference, two of which are arranged along the horizontal direction of the inner tank body 13, and the other two are arranged along the vertical direction of the inner tank body 13. Here, after the connecting shaft 31 is assembled with the end cap of the inner tank body 13, the connecting shaft 31 is in a cantilever state. In order to enhance the anti-destruction ability of the weld connecting the connecting shaft 31 and the end cap of the inner tank body 13, four fourth reinforcing ribs 37 are welded and assembled at the tail of the connecting shaft 31, which can increase the connecting shaft 31 to resist the stress deformation generated by the inner tank body 13 under the action of the transverse load, thereby protecting the assembly weld of the connecting shaft 31 and the inner tank body 13.

[0082] The connecting shaft 31, the supporting cylinder 21, the cover plate 22, the first sleeve 23, the second sleeve 25, the connecting shaft sleeve 27, the first pressure strip 28 and the second pressure strip 29, as well as the first reinforcing rib plate 34, the second reinforcing rib plate 35, the third reinforcing rib plate 36, the fourth reinforcing rib plate 37 and the reinforcing ring 33 are all made of the same material as the inner tank body 13, which is austenitic stainless steel.

[0083] like Figures 8 to 12As shown, the vertical support assembly W includes an upper ball joint unit 1, a lower ball joint unit 2, a support rod 3, a protective tube 4 and a bottom sealing plate 5; the upper ball joint unit 1 and the lower ball joint unit 2 have the same structure, and both include a support base 6, a hinge ball body 7, a joint body 8, an anti-drop pin 9, a base end cover 10 and a fixing bolt 11; the interior of the support base 6 is a spherical space a, and the inner side surface of the base end cover 10 is a spherical surface b, and the two cooperate to form a closed spherical inner cavity, and the hinge ball body 7 is arranged in the spherical inner cavity to form a spherical motion pair c, and the hinge ball body 7 A gap is provided between the support base 6 and the spherical inner cavity; a first through hole d connected to the spherical inner cavity is provided on the side wall of the support base 6, and the first through hole d adopts a chamfered structure, which means that the outer hole diameter of the first through hole d is larger than the inner hole diameter; a blind hole e and a second through hole f perpendicular to each other and passing through the center of the sphere are provided on the hinge spherical body 7; a third through hole g is provided radially at one end of the joint body 8; one end of the joint body 8 provided with the third through hole g passes through the first through hole d and is inserted into the blind hole e; the outer diameter of the anti-drop pin 9 is smaller than the second through hole The anti-drop pin 9 is inserted into the second through hole f and the third through hole g from one side of the base end cover 10 to fix the joint body 8 and the hinge ball body 7 together; the support base 6 and the base end cover 10 are fastened by the fixing bolt 11; the support rod 3 passes through the through hole set on the outer tank body 12 to be supported, and a gap is left between the support rod 3 and the outer tank body 12, and its two ends are respectively fixedly connected to the other end of the joint body 8 of the upper ball joint unit 1 and the lower ball joint unit 2; the support base 6 of the upper ball joint unit 1 is connected to the lower ball joint unit 2 by the support ear seat 20 It is fixedly connected to the outer surface of the inner tank body 13; the bottom sealing plate 5 is fixedly arranged on the height adjustment member 38 of the tank truck chassis, and the supporting base 6 of the lower ball joint unit 2 is fixedly connected to the bottom sealing plate 5; the protective tube 4 includes an upper protective tube 14 and a lower protective tube 15, the upper end of the upper protective tube 14 is fixedly connected to the surface of the outer tank body 12, the lower end of the upper protective tube 14 is fixedly connected to the upper end of the lower protective tube 15, and the lower end of the lower protective tube 15 is fixedly connected to the surrounding area of ​​the lower ball joint unit 2 of the bottom sealing plate 5, and the surface of the outer tank body 12, the upper protective tube 14, the lower protective tube 15, and the bottom sealing plate 5 constitute a sealed cavity.

[0084] The support rod 3 can rotate in any direction in space around the center of the upper ball joint unit 1 and the lower ball joint unit 2, respectively, so that when the large-volume low-temperature storage and transportation container is loaded with liquid goods, the inner tank body 13 is subjected to the cold contraction caused by the cold liquid goods, and the cold contraction of the inner tank body 13 occurs along the longitudinal direction and the radial direction of the inner tank body 13. The two ends of the support rod 3 can rotate freely in three-dimensional space around the respective geometric centers of the upper ball joint unit 1 and the lower ball joint unit 2, respectively, thereby avoiding the thermal expansion and contraction deformation of the inner tank body 13 during the loading and unloading process, and further avoiding the problem of fatigue failure of the welds connecting the inner tank body 13, the outer tank body 12 and the vertical support assembly W.

[0085] The long diameter Z of the oblong hole 32 of the lateral auxiliary support assembly U is obtained by the following formula:

[0086] Z≥H·G%·N+Φ

[0087] in:

[0088] H is the clear height of the vertical support assembly W, in mm;

[0089] G is the shrinkage rate of the material of the support rod 3;

[0090] N is the anti-interference safety factor between the oblong hole 32 of the connecting sleeve 27 and the connecting shaft 31 of the lateral auxiliary support assembly U;

[0091] Φ is the outer diameter of the connecting shaft 31 of the lateral auxiliary support assembly U, in mm.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. For ordinary professional and technical personnel in the field, the specific technical solutions recorded in the aforementioned embodiments can be modified, or some of the technical features therein can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions protected by the present invention.

Claims

1. An auxiliary support unit for a large-volume cryogenic vacuum storage tank vehicle, characterized in that: It comprises a connecting sleeve fixedly connected to an outer tank body (12) of a low-temperature vacuum storage tank truck and a connecting shaft (31) fixedly connected to an inner tank body (13) of the low-temperature vacuum storage tank truck; The connecting sleeve comprises a supporting cylinder (21) fixedly connected to the outer tank body (12), a cover plate (22) fixedly connected and sealed to an end of the supporting cylinder (21) away from the inner tank body (13), and a first sleeve (23), a heat insulation plate (24), a second sleeve (25), an annular heat insulation member (26) and a connecting sleeve (27) arranged in the supporting cylinder (21); One end of the first sleeve (23) contacts the cover plate (22), and the other end contacts one side surface of the heat insulation plate (24); the other side surface of the heat insulation plate (24) contacts one end of the second sleeve (25), and the other end of the second sleeve (25) contacts one side surface of the outer circle of the annular heat insulation member (26); the inner and outer sides of the connecting sleeve (27) close to one end of the inner tank body (13) are provided with flanges, and the outer flange presses against the end surface of the inner circle of the annular heat insulation member (26) close to one side of the inner tank body (13); the other end surface of the inner circle of the annular heat insulation member (26) is fixedly connected with a first pressure strip (28), and the first pressure strip (28) is fixedly connected to the side surface of the connecting sleeve (27); the end surface of the outer circle of the annular heat insulation member (26) is fixedly connected with a second pressure strip (29), and the second pressure strip (29) is fixedly connected to the side surface of the support cylinder (21) close to one end of the inner tank body (13); The connecting shaft (31) is inserted into the matching hole of the connecting shaft sleeve (27); The length of the end surface p of the connecting shaft (31) on the side facing the outer tank body (12) beyond the end surface q of the connecting shaft sleeve (27) on the side is D, and D can be calculated by the following formula: D=L·M%·K in, L is the axial length of the inner tank body (13), in mm; M is the shrinkage rate of the material of the inner tank body (13); K is the safety factor against falling off, 1≤K≤1.5; The annular heat insulating member (26) is evenly distributed with a plurality of through holes (30).

2. The auxiliary support unit for a large-volume cryogenic vacuum storage tank vehicle according to claim 1 is characterized in that: The heat insulation board (24) and the annular heat insulation member (26) are both made of glass fiber reinforced plastic.

3. A large-volume cryogenic vacuum storage and transportation tank truck, comprising an outer tank body (12), an inner tank body (13) and a bottom frame, and four height adjustment members (38) arranged on the bottom frame and located below the outer tank body (12), characterized in that: It also includes an auxiliary support assembly disposed between the outer tank body (12) and the inner tank body (13); the auxiliary support assembly includes one transverse auxiliary support assembly U, two longitudinal auxiliary support assemblies V and four vertical support assemblies W, which together form a seven-point support structure; The lateral auxiliary support assembly U adopts the auxiliary support unit as claimed in any one of claims 1 or 2, wherein the support cylinder (21) is fixedly connected to the center of the end cap of the outer tank body (12), and the connecting shaft (31) is fixedly connected to the center of the end cap of the inner tank body (13) at the end; the matching hole of the connecting shaft sleeve (27) adopts an oblong hole (32), and the long diameter direction of the oblong hole (32) is perpendicular to the chassis of the cryogenic vacuum storage tank truck; The two longitudinal auxiliary support assemblies V adopt the auxiliary support unit as claimed in any one of claims 1 or 2, the two support cylinders (21) are respectively fixedly connected to the highest position and the lowest position of the cylinder near the head at the other end of the outer tank body (12), and the two connecting shafts (31) are fixedly connected to the inner tank body (13) at positions opposite to the two connecting sleeves (27), and the matching holes of the connecting sleeves (27) are through holes that are adapted to the shape of the connecting shafts (31); Each of the vertical support components W is arranged between the inner tank body (13), the outer tank body (12) and a height adjustment member (38).

4. The large-capacity cryogenic vacuum storage and transportation tanker according to claim 3 is characterized in that: Two reinforcement rings (33) are provided on the inner wall of the inner tank body (13) along the circumferential direction, the two reinforcement rings (33) are located on both sides of the connecting shaft (31) of the longitudinal auxiliary support assembly V, and the two reinforcement rings (33) are connected to the connecting shaft (31) via a first reinforcement rib plate (34); Four second reinforcing ribs (35) are evenly distributed along the circumference at the outer wall of the supporting cylinder (21) of the longitudinal auxiliary supporting assembly V on the outer wall of the outer tank body (12), two of which are arranged along the axial direction of the outer tank body (12), and the other two are arranged along the circumferential direction of the outer tank body (12).

5. The large-capacity cryogenic vacuum storage and transportation tanker according to claim 4 is characterized in that: Two third reinforcing ribs (36) are radially arranged at the outer wall of the supporting cylinder (21) of the transverse auxiliary supporting assembly U on the outer wall of the outer tank body (12), and the two third reinforcing ribs (36) are parallel to the plane of the tank truck chassis; At the connection axis (31) of the transverse auxiliary support assembly U on the inner wall of the inner tank body (13), four fourth reinforcing rib plates (37) are evenly distributed along the circumference, two of which are arranged along the horizontal direction of the inner tank body (13), and the other two are arranged along the vertical direction of the inner tank body (13).

6. The large-capacity cryogenic vacuum storage and transportation tanker according to claim 5 is characterized in that: The connecting shaft (31), the supporting cylinder (21), the cover plate (22), the first sleeve (23), the second sleeve (25), the connecting shaft sleeve (27), the first pressure strip (28) and the second pressure strip (29), as well as the first reinforcing rib plate (34), the second reinforcing rib plate (35), the third reinforcing rib plate (36), the fourth reinforcing rib plate (37) and the reinforcing ring (33) are all made of the same material as the inner tank body (13), that is, austenitic stainless steel.

7. The large-capacity cryogenic vacuum storage and transportation tanker according to any one of claims 3 to 6, characterized in that: The vertical support assembly W comprises an upper ball joint unit (1), a lower ball joint unit (2), a support rod (3), a protective tube (4) and a bottom sealing plate (5); The upper ball joint unit (1) and the lower ball joint unit (2) have the same structure, and both comprise a support base (6), a joint ball body (7), a joint body (8), an anti-drop pin (9), a base end cover (10) and a fixing bolt (11); The interior of the support base (6) is a spherical space a, and the inner side surface of the base end cover (10) is a spherical surface b, and the two cooperate to form a closed spherical inner cavity, and the hinge ball (7) is arranged in the spherical inner cavity to form a spherical kinematic pair c, and a gap is provided between the hinge ball (7) and the spherical inner cavity; The side wall of the support base (6) is provided with a first through hole d communicating with the spherical inner cavity, and the first through hole d adopts a chamfered structure, and the chamfered structure means that the outer opening diameter of the first through hole d is larger than the inner opening diameter; the hinge ball body (7) is provided with a blind hole e and a second through hole f which are perpendicular to each other and pass through the center of the ball; one end of the joint body (8) is provided with a third through hole g in the radial direction; the end of the joint body (8) provided with the third through hole g passes through the first through hole d and is inserted into the blind hole e; The outer diameter of the anti-drop pin (9) is smaller than the second through hole f and the third through hole g. The anti-drop pin (9) is inserted into the second through hole f and the third through hole g from one side of the base end cover (10) to fix the joint body (8) and the hinge ball body (7) together; the support base (6) and the base end cover (10) are fastened by the fixing bolt (11); The support rod (3) passes through a through hole provided on the outer tank body (12) to be supported, and a gap is left between the support rod (3) and the outer tank body (12), and its two ends are respectively fixedly connected to the other ends of the joint bodies (8) of the upper ball joint unit (1) and the lower ball joint unit (2); the support base (6) of the upper ball joint unit (1) is fixedly connected to the outer surface of the inner tank body (13) through the support ear seat (20); the bottom sealing plate (5) is fixedly arranged on the height adjustment member (38) on the tank truck chassis, and the support base (6) of the lower ball joint unit (2) is fixedly connected to the bottom sealing plate (5); The protective tube (4) comprises an upper protective tube (14) and a lower protective tube (15); the upper end of the upper protective tube (14) is fixedly connected to the surface of the outer tank body (12); the lower end of the upper protective tube (14) is fixedly connected to the upper end of the lower protective tube (15); the lower end of the lower protective tube (15) is fixedly connected to the surrounding area of ​​the lower ball joint unit (2) of the bottom sealing plate (5); the surface of the outer tank body (12), the upper protective tube (14), the lower protective tube (15) and the bottom sealing plate (5) form a sealed cavity.

8. The large-capacity cryogenic vacuum storage and transportation tanker according to claim 7 is characterized in that: In the lateral auxiliary support assembly U, the center height of the oblong hole (32) is lower than the height of the axis of the connecting shaft (31); The long diameter Z of the oblong hole (32) is obtained by the following formula: Z≥H·G%·N+Φ in: H is the clear height of the vertical support assembly W, in mm; G is the shrinkage rate of the material of the support rod (3); N is the anti-interference safety factor between the oblong hole (32) of the connecting sleeve (27) and the connecting shaft (31) of the lateral auxiliary support assembly U; Φ is the outer diameter of the connecting shaft (31) of the lateral auxiliary support assembly U, in mm.

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