A cryogenic liquid insulated tank truck

Abstract

The present invention discloses a cryogenic liquid insulated tank truck, comprising a traction pin assembly arranged on an outer container tank body of a double-layer tank body, a wave-proof device arranged in an inner container of the double-layer tank body, and a liquid phase damper for pressure measurement arranged on the double-layer tank body; the traction pin assembly comprises a traction chamber arranged in a traction base, and a composite elastic deformation body installed in the traction chamber, the composite elastic deformation body comprises a rigid body slidably arranged in the traction chamber in a horizontal direction, and an elastic body arranged on the rigid body, an elastic deformation connection is formed between the elastic body in the composite elastic deformation body and the traction chamber in a horizontal direction, and a traction pin is vertically arranged on the rigid body in the composite elastic deformation body; a wave-absorbing module is arranged on the wave-proof device; and a heat transfer balance automatic compensator is arranged on the liquid phase damper for pressure measurement. The present invention improves the safety of cryogenic liquid insulated tank trucks.

Description

Technical Field

[0001] The invention relates to the technical field of cryogenic liquid transport vehicle components, and in particular to a cryogenic liquid insulated tank truck. Background Art

[0002] A cryogenic liquid insulated tank truck is a mobile cryogenic liquid transport container used to store cryogenic liquid and can be transported on roads. It usually adopts a semi-trailer structure. The overall structure of the tank truck includes a tank body, a running mechanism arranged at the rear of the tank body, and a traction pin assembly arranged at the front of the tank body for connecting the front of the vehicle. The traction pin assembly on the tank body can be used to connect the cryogenic liquid insulated tank truck to the semi-trailer head, thereby realizing the transportation of the cryogenic liquid insulated tank truck.

[0003] The tank body of the cryogenic liquid insulated tank truck is a double-layer tank body. The inner tank body (inner container) is used to store cryogenic liquids such as liquid hydrogen, liquid oxygen, liquid nitrogen, and liquefied gas (the temperature is usually below -100°C). The outer tank body (outer container) is arranged on the periphery of the inner tank body, and the enclosed space between the outer tank body and the inner tank body is evacuated to form an insulating space; in addition, a layer of insulating material is also provided on the inner tank body.

[0004] The cryogenic liquid insulated tank trucks in the prior art still have the following problems when in use:

[0005] First, during the transportation of cryogenic liquid insulated tank trucks, affected by external factors (such as emergency stop, sudden start, accidental collision of the front of the vehicle, etc.), the liquid in the tank will shake violently due to the effect of inertia, thereby generating a surge impact on the tank body. The huge liquid surge impact force will have a potential destructive effect on the tank body, thereby causing a greater safety hazard. According to the actual use, the surge impact force generated by the cryogenic liquid insulated tank truck is usually the largest in the three situations of starting, emergency stop and accidental collision of the front of the vehicle, which can make the liquid surge in the tank reach the maximum peak value, and its potential destructive effect on the tank body is the greatest, which is easy to cause potential dangers such as leakage of liquid inside the tank body or even explosion. However, the existing wave-breaking plates still have the disadvantage of being easily damaged due to insufficient impact resistance. Therefore, if we can try to reduce or cut the surge peak caused by the start-up, emergency stop and accidental collision of the tank truck, the safety of cryogenic liquid insulated tank trucks can be greatly improved.

[0006] Secondly, in order to ensure the safety of the cryogenic liquid insulated tank truck, the internal pressure of the tank body needs to be monitored in real time. For this purpose, a pressure measuring line is led out from the inner tank body, and a pressure gauge is connected to the pressure measuring line. The specific pressure measurement method is to lead the cryogenic liquid in the tank through the pressure measuring line and then convert it into gas inside the pressure measuring line, and evaluate the pressure inside the tank by measuring the gas pressure inside the pressure measuring line. However, in the above pressure measurement method, there is a transition zone inside the pressure measuring line where the cryogenic liquid is converted into gas. The transition zone is a mixed phase of liquid and gas. When the mixed phase extends to a section of the pressure measuring line outside the tank body, the stability and reliability of the pressure measurement will be reduced. Summary of the invention

[0007] In order to solve the above problems, the present invention proposes a cryogenic liquid insulated tank truck, aiming to improve the safety of the cryogenic liquid insulated tank truck. The specific technical solution is as follows:

[0008] A low-temperature liquid insulated tank truck, comprising a double-layer tank body consisting of an inner container and an outer container, a walking mechanism arranged at the lower side of the rear half of the outer container tank body of the double-layer tank body for carrying the double-layer tank body, a traction pin assembly arranged at the lower side of the front part of the outer container tank body for connecting with the front of the vehicle, and a supporting device arranged at the lower side of the front part of the outer container tank body and located behind the traction pin assembly; wherein the traction pin assembly comprises a traction frame arranged at both sides of the lower part of the tank body outer wall of the outer container of the low-temperature liquid insulated tank truck, a traction base connected to the lower part of the traction frame, and a traction base arranged at the lower part of the traction frame. A traction chamber in the traction base and a composite elastic deformation body installed in the traction chamber, the composite elastic deformation body comprising a rigid body slidably arranged in the traction chamber along a horizontal direction and an elastic body arranged on the rigid body, an elastic deformation connection is formed between the elastic body in the composite elastic deformation body and the traction chamber in the horizontal direction, a gap penetrating up and down is arranged on the lower wall of the traction chamber, a traction pin is vertically arranged on the rigid body in the composite elastic deformation body, and the traction pin passes downward through the gap on the lower wall of the traction chamber and is exposed to the lower position of the traction base.

[0009] In the present invention, brackets are arranged at both sides of the middle of the outer container tank body of the double-layer tank body, and guardrails are arranged on the brackets. A number of marker lights are arranged on the guardrails in the longitudinal direction.

[0010] In the present invention, the traveling mechanism comprises a frame platform and a plurality of wheels arranged below the frame platform; a pair of V-shaped beams disposed on both sides of the outer container tank body are disposed at the lower side of the rear half of the outer container tank body of the double-layer tank body, and a plurality of supports are disposed at longitudinal intervals at the lower part of the V-shaped beams; the double-layer tank body is fixed to the frame platform through the supports.

[0011] In the present invention, a valve box for connecting pipelines on the double-layer tank body is arranged at the rear end of the frame platform near the tail of the double-layer tank body.

[0012] In the present invention, an electrostatic grounding belt is also provided at the rear end of the frame platform.

[0013] In the present invention, the support device is provided with retractable reinforced legs, and the reinforced legs can be put down when parking.

[0014] As a preferred solution of the elastomer structure in the present invention, the elastomer is an elastic rubber sleeve densely arranged in an array in the rigid body, and a transmission pin is inserted into each of the elastic rubber sleeves in an elastic contact manner, and the upper and lower ends of the transmission pin are respectively connected to the upper side wall and the lower side wall of the traction chamber.

[0015] In the present invention, a wave-breaking device is arranged inside the inner container of the double-layer tank body, and the wave-breaking device includes a number of conical wave-breaking plates arranged at intervals in the inner container of the cryogenic liquid insulated tank truck, the conical wave-breaking plates are arranged perpendicularly to the central axis of the inner container of the cryogenic liquid insulated tank truck and are connected to the tank wall of the inner container, a pair of crescent-shaped wave-breaking notches are respectively provided at the upper and lower edge positions of the outer circle of the conical wave-breaking plates, a central through hole is provided at the central position of the conical wave-breaking plates, and a circle of flanges is also provided at the central through hole position of the conical wave-breaking plates, the flange direction of the circle of flanges is arranged back to back with respect to the large end tapered hole of the conical wave-breaking plates, and a number of wave-breaking flow holes are also dispersedly arranged on the conical wave-breaking plates.

[0016] As a further improvement of the wave-proof device in the present invention, a pair of wave-absorbing components are correspondingly arranged at the inner walls at both ends of the inner container of the low-temperature liquid insulated tank truck near the inner container head, and the wave-absorbing component includes a stainless steel lining plate arranged on the inner wall of the inner container head of the inner container, and a number of wave-absorbing modules densely installed on the stainless steel lining plate, and each of the wave-absorbing modules includes a stainless steel wave-absorbing seat ring, a stainless steel wave-absorbing mesh fixed on the front of the stainless steel wave-absorbing seat ring, and stainless steel wire balls filled in the wave-absorbing mesh cover.

[0017] Preferably, the wave absorbing modules are also installed on both sides of the conical wave-breaking plate in a circular array arrangement to reduce the impact of the surging liquid on the conical wave-breaking plate itself and effectively reduce the impact peak of the surging liquid in the tank on the tank body.

[0018] In the present invention, a liquid phase damper for pressure measurement is arranged on the double-layer tank body, and the liquid phase damper for pressure measurement includes a pressure measuring pipeline which is connected with the inner container of the low-temperature liquid insulated tank truck and passes through the insulating space between the inner container and the outer container of the warm liquid insulated tank truck and leads to the outside of the outer container. A heat transfer element is connected to the outer circle of a section of the pressure measuring pipeline located inside the insulating space, and the heat transfer element is connected to the inner wall of the outer container; the heat transfer element is a heat-conducting metal part which is arranged on the outer wall of the pressure measuring pipeline and contacts the outer wall of the pressure measuring pipeline.

[0019] Preferably, a closed cover is provided on the inner tank wall of the inner container, a section of the cryogenic liquid pipe entering the inner container is covered by the closed cover, a gap for the cryogenic liquid to pass through is provided between one side of the closed cover and the inner tank wall of the inner container, and a flow-limiting hole for the cryogenic liquid to pass through is provided on the top of the closed cover.

[0020] As a preferred solution of the heat-conducting metal part in the present invention, the heat-conducting metal part is a U-shaped elastic metal clip, the U-shaped groove of the U-shaped elastic metal clip is clamped on the two side surfaces of the pressure measuring pipeline, and copper wires in contact with the inner wall of the outer container are respectively led out from both ends of the U-shaped elastic metal clip; a number of strip bosses for controlling excessive or insufficient heat transfer are arranged at intervals on the clamping surface of the U-shaped elastic metal clip in contact with the pressure measuring pipeline, and the two side surfaces of the pressure measuring pipeline are correspondingly in contact with the strip bosses.

[0021] As a further improvement of the liquid phase damper for pressure measurement in the present invention, a heat transfer balance automatic compensator for dynamically balancing the amount of heat transfer is also arranged between the U-shaped elastic metal clip and the pressure measuring pipeline. The heat transfer balance automatic compensator includes setting the strip boss on the clamping surface of the U-shaped elastic metal clip to a trapezoidal boss, and setting a thermal expander between the bottom of the U-shaped groove of the U-shaped elastic metal clip and the pressure measuring pipeline, one end of the thermal expander is fixedly connected to the bottom of the U-shaped groove of the U-shaped elastic metal clip, and the other end of the thermal expander is fixedly connected to the side of the pressure measuring pipeline opposite to the bottom of the U-shaped groove on the pressure measuring pipeline; the width of the trapezoidal boss gradually decreases in the direction from the bottom of the U-shaped groove to the mouth of the U-shaped groove.

[0022] Preferably, the thermal expander is a strip-shaped bimetallic strip, or a disc-shaped bimetallic strip assembly formed by stacking and connecting a plurality of disc-shaped bimetallic strips into one body.

[0023] The beneficial effects of the present invention are:

[0024] First, a cryogenic liquid insulated tank truck of the present invention is provided with a cryogenic liquid insulated tank truck traction pin assembly which can realize surge peak cutting. By arranging a composite elastic deformation body in the traction chamber of the traction base, it can play a role of buffering displacement between the tank truck and the front of the vehicle when the tank truck is started, stopped suddenly or the front of the vehicle collides accidentally, thereby effectively reducing or cutting the surge peak value of the liquid in the tank body, thereby improving the safety of the cryogenic liquid insulated tank truck against surge impact.

[0025] Secondly, in a cryogenic liquid insulated tank truck of the present invention, the elastomer in the traction pin assembly is an elastic rubber sleeve densely arranged in an array in a rigid body, which can decompose the impact force between the tank truck and the front of the truck to each elastic rubber sleeve, so that the impact force borne by each elastic rubber sleeve is smaller. Compared with the elastomer using an annular elastic rubber belt, the fatigue resistance and service life of the elastomer can be greatly improved, thereby reducing the maintenance and replacement cost of the traction pin assembly.

[0026] Third, in the cryogenic liquid insulated tank truck of the present invention, the wave absorbing components as wave-proof devices are arranged on the inner wall of the inner container head at both ends of the inner container, and a part of the energy of the surge impact can be effectively absorbed by the wave absorbing components, thereby reducing the peak value of the surge impact. The wave absorbing components are arranged on the conical wave-breaking plate, which can also reduce the peak value of the surge impact and has a good protective effect on the conical wave-breaking plate itself.

[0027] Fourthly, a cryogenic liquid insulated tank truck of the present invention is provided with a liquid phase damper for pressure measurement on the double-layer tank body. By arranging a heat transfer element on a section of the pressure measuring pipeline located in the insulating space and connecting the heat transfer element to the inner wall of the outer container, the pressure measuring pipeline can absorb a small amount of heat from the tank wall of the outer container, thereby accelerating the gasification of the mixed phase inside the pressure measuring pipeline, thereby effectively preventing the cryogenic liquid from extending in the pressure measuring pipeline toward the pressure measuring end, thereby improving the stability and reliability of the pressure measurement of the cryogenic liquid insulated tank truck.

[0028] Fifth, in the low-temperature liquid insulated tank truck of the present invention, the liquid phase damper for pressure measurement is provided with a closed cover on the inner tank wall of the inner container, a gap is provided between the cover and the inner tank wall of the inner container, and a flow-limiting hole is provided on the cover, so that the fluctuation of the liquid inside the closed cover can be reduced and the influence of the surge of the low-temperature liquid inside the tank body can be avoided, thereby improving the accuracy of pressure measurement.

[0029] Sixth, in a low-temperature liquid insulated tank truck of the present invention, a liquid phase damper for pressure measurement is provided with a heat transfer balance automatic compensator between a U-shaped elastic metal clip and the pressure measuring pipeline, thereby avoiding the disadvantage of excessive or insufficient heat being transferred to the pressure measuring pipeline due to the influence of ambient temperature or other interference factors. While ensuring that the liquid phase inside the pressure measuring pipeline is fully converted into gas, the insulation effect of the warm liquid insulated tank truck is improved, which is beneficial to avoiding or reducing the safety risk of rapid increase in internal pressure of the tank body caused by excessive heat transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a cryogenic liquid insulated tank truck of the present invention;

[0031] Figure 2 yes Figure 1 One of the structural schematic diagrams of the traction pin assembly in FIG. 1 (using an annular elastic rubber belt as the elastic body);

[0032] Figure 3 yes Figure 1 The second structural diagram of the traction pin assembly (using elastic rubber sleeves arranged in an array as the elastic body);

[0033] Figure 4 yes Figure 1 The third structural diagram of the traction pin assembly (using an annular elastic rubber belt and an elastic rubber sleeve arranged in an array as the elastic body);

[0034] Figure 5 Is set in Figure 1 A schematic diagram of the structure of the wave-proof device inside the tank of the cryogenic liquid insulated tank truck;

[0035] Figure 6 yes Figure 5 A schematic diagram of the structure of the conical wave-breaking plate;

[0036] Figure 7 yes Figure 6 Right view of;

[0037] Figure 8 is Figure 6 A schematic diagram of a structure in which an absorbing component is arranged on the inner wall of the container head at both ends of the container;

[0038] Fig. 9 yes Figure 8 A magnified view of the absorber assembly in FIG.

[0039] Fig.10 is Figure 1 A schematic diagram of a structure in which a liquid phase damper for pressure measurement is arranged on the tank body of a cryogenic liquid insulated tank truck;

[0040] Fig.11 is Fig.10 A schematic diagram of a structure after a heat transfer balance automatic compensator is added on the basis of the above (in which a disc-shaped bimetallic strip assembly is used as a thermal expander);

[0041] Fig.12 yes Fig.11 A partial enlarged view of

[0042] Fig.13 is Fig.10 A schematic diagram of the structure after a heat transfer balance automatic compensator is added on the basis of the above (a strip bimetallic strip is used as a thermal expander);

[0043] Fig.14 yes Fig.13 A partial enlarged view of

[0044] Fig.15 It is a schematic diagram of the structure of a section of the pressure measuring pipeline in contact with the U-shaped elastic metal clamp using a circular pressure measuring pipeline;

[0045] Fig.16 It is a schematic diagram of the structure of a section of pressure measuring pipeline in contact with a U-shaped elastic metal clip using a rectangular pressure measuring pipeline;

[0046] Fig.17 yes Fig.15 Schematic diagram of the structure when the thermal expander uses a disc-shaped bimetallic strip assembly.

[0047] In the figure: 001, walking mechanism, 002, supporting device, 003, bracket, 004, guardrail, 005, marker light, 006, frame platform, 007, wheel, 008, V-beam, 009, support, 010, valve box, 011, static grounding belt, 012, reinforced outrigger.

[0048] In the figure: 101, inner container, 101-1, inner container head, 102, outer container, 103, insulation space, 104, pressure measuring pipeline, 105, heat transfer element, 106, copper wire, 107, spiral winding section, 108, cryogenic liquid pipe, 109, throttle nozzle, 110, closed cover, 111, gap, 112, flow limiting hole, 113, heat transfer balance automatic compensator, 114, U-shaped elastic metal clip, 115, thermal expander, 116, strip boss, 117, elastic clamping piece, 118, hanging plate, 119, tension spring, 120, strip bimetallic strip, 121, disc-shaped bimetallic strip assembly, 122, U-shaped slot, 123, groove.

[0049] In the figure: 201, conical wave-breaking plate, 202, crescent-shaped wave-breaking notch, 203, central through hole, 204, flange, 205, wave-breaking flow hole, 206, connecting flange, 207, transition arc, 208, wave-absorbing component, 209, stainless steel lining plate, 210, wave-absorbing module, 211, stainless steel wave-absorbing seat ring, 212, stainless steel wave-absorbing mesh cover, 213, stainless steel wire ball, 214, seat ring positioning hole, 215, external stop.

[0050] In the figure: 300, traction pin assembly, 301, traction frame, 302, traction base, 303, traction chamber, 304, composite elastic deformation body, 305, rigid body, 306, elastic body, 307, neutral gear, 308, traction pin, 309, annular elastic rubber belt, 310, elastic rubber sleeve, 311, transmission pin, 312, upper side wall, 313, lower side wall, 314, cover plate, 315, bolt, 316, positioning pin, 317, traction pin mounting hole, 318, positioning column, 319, mounting flange, 320, screw, 321, upper pin hole, 322, lower pin hole. DETAILED DESCRIPTION

[0051] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0052] like Figures 1 to 17The figure shows an embodiment of a cryogenic liquid insulated tank truck of the present invention, comprising a double-layer tank body consisting of an inner container 101 and an outer container 102, a walking mechanism 001 arranged at the lower side of the rear half of the outer container 102 of the double-layer tank body for carrying the double-layer tank body, a traction pin assembly 300 arranged at the lower side of the front of the outer container 102 for connecting with the front of the vehicle, and a supporting device 002 arranged at the lower side of the front of the outer container 102 and located behind the traction pin assembly 300; wherein the traction pin assembly 300 comprises a traction frame 301 arranged at both sides of the lower part of the tank body wall of the outer container 102 of the cryogenic liquid insulated tank truck, a traction base 302 connected to the lower part of the traction frame 301, and a traction support 002 arranged at the lower side of the front of the outer container 102. A traction chamber 303 in a base 302 and a composite elastic deformation body 304 installed in the traction chamber 303, wherein the composite elastic deformation body 304 comprises a rigid body 305 slidably arranged in the traction chamber 303 along a horizontal direction and an elastic body 306 arranged on the rigid body 305, wherein the elastic body 306 in the composite elastic deformation body 304 forms an elastic deformation connection with the traction chamber 303 in the horizontal direction, and a gap 307 penetrating upward and downward is arranged on the lower chamber wall of the traction chamber 303, and a traction pin 308 is vertically arranged downward on the rigid body 305 in the composite elastic deformation body 304, and the traction pin 308 passes downward through the gap 307 on the lower chamber wall of the traction chamber 303 and is exposed to the lower position of the traction base 302.

[0053] In this embodiment, the traction base 302 is located at the front lower side of the tank body of the outer container 102 of the cryogenic liquid insulated tank truck.

[0054] In this embodiment, brackets 003 are further provided at both sides of the middle of the outer container 102 of the double-layer tank, and guardrails 004 are provided on the brackets 003 . A number of marker lights 005 are provided on the guardrails 004 along the longitudinal direction.

[0055] In this embodiment, the walking mechanism 001 includes a frame platform 006 and a plurality of wheels 007 arranged below the frame platform 006; a pair of V-shaped beams 008 are arranged on both sides of the outer container 102 at the lower side of the rear half of the outer container 102 of the double-layer tank body, and a plurality of supports 009 are arranged at longitudinal intervals at the lower part of the V-shaped beams 008; the double-layer tank body is fixed to the frame platform 006 through the supports 009.

[0056] In this embodiment, a valve box 010 for connecting the pipelines on the double-layer tank body is arranged at the rear end of the frame platform 006 near the tail of the double-layer tank body.

[0057] In this embodiment, an electrostatic grounding belt 011 is further provided at the rear end of the vehicle frame platform 006 .

[0058] In this embodiment, the support device 002 is provided with retractable reinforced legs 012, and the reinforced legs 012 can be put down when parking.

[0059] As one of the preferred schemes of the elastic body structure in this embodiment, the elastic body 306 is an annular elastic rubber belt 309 wrapped around the four sides of the rigid body 305 , and the annular elastic rubber belt 309 is in elastic contact with the four inner side walls of the traction chamber 303 .

[0060] As the second preferred solution of the elastomer structure in this embodiment, the elastomer 305 is an elastic rubber sleeve 310 densely arranged in an array in the rigid body 305, and a transmission pin 311 is inserted into each of the elastic rubber sleeves 310 in an elastic contact manner, and the upper and lower ends of the transmission pin 311 are respectively connected to the upper side wall 312 and the lower side wall 313 of the traction chamber 303.

[0061] Preferably, the rigid body 305 is provided with the annular elastic rubber belt 309 and the elastic rubber sleeve 310 at the same time.

[0062] In this embodiment, the rigid body 305 is densely provided with rubber sleeve mounting holes which penetrate vertically in an array arrangement, and the elastic rubber sleeve 310 is installed in the rubber sleeve mounting holes in an elastic contact manner.

[0063] No matter the elastic body 306 adopts the annular elastic rubber belt 309 or the elastic rubber sleeve 310 arranged in an array, or adopts both the annular elastic rubber belt 309 and the elastic rubber sleeve 310 arranged in an array, it can achieve bidirectional buffering effect in the longitudinal and lateral directions, thereby further improving the safety of the cryogenic liquid insulated tank truck against surge impact.

[0064] Preferably, the horizontal cross-section of the traction chamber 303 is rectangular or circular.

[0065] When the horizontal cross-sectional shape of the traction chamber 303 is rectangular, the rigid body 305 adopts a rectangular rigid plate with a rectangular horizontal cross-sectional shape, and the elastic rubber sleeves 310 are densely arranged in the rubber sleeve mounting holes of the rectangular rigid plate in a matrix array arrangement; when the horizontal cross-sectional shape of the traction chamber 303 is circular, the rigid body 305 adopts a circular rigid plate with a circular horizontal cross-sectional shape, and the elastic rubber sleeves 310 are densely arranged in the rubber sleeve mounting holes of the circular rigid plate in a matrix array arrangement.

[0066] As a preferred solution of the traction base structure, the traction base 302 is provided with an inner cavity with an open lower end for forming the traction chamber 303, and a cover plate 314 is provided at the lower end of the traction base 302, and the cover plate 314 covers the open inner cavity on the traction base 302 to form the traction chamber 303; the cover plate 314 is fixed to the lower end surface of the traction base 302 by bolts 315, and a plurality of positioning pins 316 are also provided between the traction base 302 and the cover plate 314.

[0067] Among them, the top surface of the inner cavity of the traction base 302 is densely provided with a plurality of upper pin holes 321 in an array arrangement, and the cover plate 314 is densely provided with a plurality of lower pin holes 322 in an array arrangement, and the upper and lower ends of each of the transmission pins 311 are respectively positioned in the upper pin hole 321 and the lower pin hole 322.

[0068] Preferably, the upper pin hole 321 and the lower pin hole 322 are blind holes or stepped through holes, which can achieve the limitation of the transmission pin 311 in the up and down directions.

[0069] In this embodiment, the number of the traction racks 301 is four, and each two traction racks 301 form a group. The two groups of traction racks 301 are placed on both sides of the outer wall of the tank body 102 of the low-temperature liquid insulated tank truck; the traction base 302 is connected to the lower position of the four traction racks 301.

[0070] In this embodiment, a traction pin mounting hole 317 is provided on the rigid body 305, and a positioning column 318 and a mounting flange 319 are provided on the traction pin 308. The traction pin 308 is positioned in the traction pin mounting hole 317 by the positioning column 318 and is fixed to the rigid body 305 by a screw 320 provided on the mounting flange 319.

[0071] Preferably, a sealing ring assembly (not shown) is installed at the gap 307 (the middle inner hole of the cover plate 314) of the lower wall of the traction chamber 303, and the gap 307 is filled and sealed by the sealing ring assembly, so that the traction chamber 303 forms a closed chamber. When installing the composite elastic deformation body 304, a layer of lubricating grease is applied to the sliding mating surfaces between the upper and lower surfaces of the closed chamber and the rigid body 305 (rectangular rigid plate or circular rigid plate) to reduce the resistance of the rigid body 305 sliding in the horizontal direction.

[0072] In the present embodiment, a wave-breaking device is provided inside the inner container of the double-layer tank body, and the wave-breaking device includes a number of conical wave-breaking plates 201 arranged at intervals in the inner container 101 of the cryogenic liquid insulated tank truck, the conical wave-breaking plates 201 are arranged perpendicularly to the central axis of the inner container 101 of the cryogenic liquid insulated tank truck and are connected to the tank wall of the inner container 101, a pair of crescent-shaped wave-breaking notches 202 are respectively provided at the upper and lower edge positions of the outer circle of the conical wave-breaking plates 201, a central through hole 203 is provided at the central position of the conical wave-breaking plates 201, and a circle of flanges 204 are also provided at the central through hole 203 of the conical wave-breaking plates 201, the flange direction of the circle of flanges 204 is arranged opposite to the large end tapered hole of the conical wave-breaking plates 201, and a number of wave-breaking flow holes 205 are also dispersedly arranged on the conical wave-breaking plates 201.

[0073] The wave-breaking plate is a conical wave-breaking plate 201 formed by integrally stamping a steel plate, and a flange 204 is provided at the inner hole of the conical wave-breaking plate 201, which can effectively improve the impact resistance of the wave-breaking plate, and is not easily damaged after long-term use, thereby improving the reliability of the cryogenic liquid insulated tank truck in preventing liquid surge impact. In addition, a wave-proof flow hole 205 is provided on the conical wave-breaking plate 201, which can further improve the effect of the cryogenic liquid insulated tank truck in preventing liquid surge impact.

[0074] Preferably, a circle of connecting flanges 206 perpendicular to the central axis of the inner container 101 is also provided on the outer circle of the conical wave-breaking plate 201, and the conical wave-breaking plate 201 is connected to the tank wall of the inner container 101 through the connecting flanges 206.

[0075] Preferably, the conical wave-breaking plate 201 is a conical wave-breaking plate 201 formed by integrally stamping a steel plate, the flange 204 is a straight-cylindrical flange 204 formed by die stamping, and a transition arc 207 is provided between the straight-cylindrical flange 204 and the main body of the conical wave-breaking plate 201.

[0076] Preferably, the cone angle of the conical wave-breaking plate 201 is 155-160°.

[0077] Preferably, the crescent-shaped wave-breaking gap 202 is a semicircular wave-breaking gap, and the radius of the semicircular wave-breaking gap 202 is 1 / 3 to 2 / 7 of the outer radius of the conical wave-breaking plate 201.

[0078] In this embodiment, the number of the conical wave-breaking plates 201 is three, and the three conical wave-breaking plates 201 are evenly spaced inside the inner container 101 of the cryogenic liquid insulated tank truck along the central axis direction of the inner container 101.

[0079] Considering the convenience of tank body manufacturing and subsequent inspection and maintenance, the diameter of the central through hole 203 of the conical wave-breaking plate 201 should be greater than 600 mm (preferably 900 mm) to facilitate the passage of manufacturing or maintenance personnel.

[0080] As a further improvement of the wave-proof device in the present embodiment, a pair of absorbing components 208 are correspondingly arranged at the inner walls at both ends of the inner container 101 near the inner container head 101-1 inside the low-temperature liquid insulated tank truck, and the absorbing component 208 includes a stainless steel lining plate 209 arranged on the inner wall of the inner container head 101-1 of the inner container 101, and a number of absorbing modules 210 densely installed on the stainless steel lining plate 209, each of the absorbing modules 210 includes a stainless steel absorbing seat ring 211, a stainless steel absorbing mesh cover 212 fixed on the front of the stainless steel absorbing seat ring 211, and stainless steel wire balls 213 filled in the absorbing mesh cover 212.

[0081] Preferably, a seat ring positioning hole 214 is provided on the stainless steel liner 209, and an outer stop 215 is provided on the back of the stainless steel absorbing seat ring 211. The stainless steel absorbing seat ring 211 is positioned on the seat ring positioning hole 214 of the stainless steel liner 209 through the outer stop 215 and fixed by spot welding.

[0082] In this embodiment, the shape of the stainless steel lining plate 209 is adapted to the shape of the inner wall of the inner container head 101 - 1 .

[0083] Preferably, the stainless steel lining plate 209 is fixed to the inner wall of the inner container head 101 - 1 by spot welding.

[0084] Considering that pipelines are arranged on the tube wall of the inner container 101 , pipeline avoidance holes are opened on the stainless steel lining plate 209 , and the absorbing module 210 avoids the pipelines arranged at both ends of the inner container 101 when being arranged on the stainless steel lining plate 209 .

[0085] Preferably, the wave absorbing modules 210 are also installed on both sides of the conical wave-breaking plate 201 in a circular array arrangement to reduce the impact of the surging liquid on the conical wave-breaking plate 201 itself and effectively reduce the impact peak of the surging liquid in the tank on the tank body.

[0086] In this embodiment, a liquid phase damper for pressure measurement is provided on the double-layer tank body, and the liquid phase damper for pressure measurement includes a pressure measuring pipeline 104 which is connected with the inner container 101 of the low-temperature liquid insulated tank truck and passes through the insulating space 103 between the inner container 101 and the outer container 102 of the warm liquid insulated tank truck and leads to the outside of the outer container 102; a heat transfer element 105 is connected to the outer circle of a section of the pressure measuring pipeline 104 located inside the insulating space 103, and the heat transfer element 105 is connected to the inner wall of the outer container 102; the heat transfer element 105 is a heat-conducting metal part which is arranged on the outer wall of the pressure measuring pipeline 104 and contacts the outer wall of the pressure measuring pipeline 104.

[0087] As one of the preferred schemes for the heat-conducting metal part in this embodiment, the heat-conducting metal part is a copper wire 106, and a spirally wound section 107 is provided on the copper wire 106. The spirally wound section 107 of the copper wire 106 is sheathed on the outer wall of the pressure measuring pipeline 104 and contacts the outer wall of the pressure measuring pipeline 104, and both ends of the copper wire 106 of the spirally wound section 107 are led out and connected to the inner wall of the outer container 102.

[0088] In this embodiment, a cryogenic liquid pipe 108 is provided on the tank wall of the inner container 101 , one end of the cryogenic liquid pipe 108 is located inside the inner container 101 , and the other end of the cryogenic liquid pipe 108 is located in the insulating space 103 and connected to the pressure measuring pipeline 104 .

[0089] Preferably, a throttle nozzle 109 is provided on one end of the cryogenic liquid pipe 108 located inside the inner container 101 , and a throttle hole communicating with the inner hole of the cryogenic liquid pipe 108 is provided on the throttle nozzle 109 .

[0090] Preferably, a closed cover 110 is provided on the inner tank wall of the inner container 101, a section of the cryogenic liquid pipe entering the inner container is covered by the closed cover 110, a gap 111 for the cryogenic liquid to pass is provided between one side of the closed cover 110 and the inner tank wall of the inner container 101, and a flow-limiting hole 112 for the cryogenic liquid to pass is provided on the top of the closed cover 110.

[0091] The flow cross-sectional area of ​​the liquid formed by the gap 111 is larger than the flow cross-sectional area of ​​the inner hole of the throttle nozzle 109, and the flow cross-sectional area of ​​the limited flow hole 112 is larger than the flow cross-sectional area of ​​the inner hole of the throttle nozzle.

[0092] As the second preferred solution of the heat-conducting metal part in this embodiment, the heat-conducting metal part is a U-shaped elastic metal clip 114, and the U-shaped groove 122 of the U-shaped elastic metal clip 114 is clamped on the two side surfaces of the pressure measuring pipeline 104, and the two ends of the U-shaped elastic metal clip 114 are respectively led out with copper wires 106 in contact with the inner wall of the outer container 102; on the clamping surface of the U-shaped elastic metal clip 114 in contact with the pressure measuring pipeline 104, a number of strip bosses 116 for controlling excessive or insufficient heat transfer are arranged at intervals, and the two side surfaces of the pressure measuring pipeline 104 are correspondingly in contact with the strip bosses 116.

[0093] Preferably, the strip boss 116 on the U-shaped elastic metal clip 114 can be formed by die stamping, and the clamping plane on the strip boss 116 that contacts the outer plane of the pressure measuring pipeline 104 can be formed by wire cutting.

[0094] Preferably, a section of the pressure measuring pipeline 104 in contact with the U-shaped elastic metal clip 114 is configured as a rectangular pressure measuring pipeline.

[0095] Preferably, a plurality of grooves 123 arranged at intervals are provided on both side surfaces of the rectangular pressure measuring pipeline 104 along the longitudinal direction of the pressure measuring pipeline 104 .

[0096] When the cryogenic liquid insulated tank truck is under the ideal ambient temperature design condition, by calculating the amount of heat transfer required for the conversion of the liquid phase to the gas phase on the pressure measuring pipeline 104, the contact length of the U-shaped elastic metal clip 114 along the pressure measuring pipeline 104 and the optimal contact area between the U-shaped elastic metal clip 114 and the pressure measuring pipeline 104 can be determined, so that the corresponding number and size of the strip bosses 116 on the clamping surface of the U-shaped elastic metal clip 114 can be designed.

[0097] When the pressure measuring pipe 104 is a rectangular pressure measuring pipe, the heat transfer amount can also be controlled by optimizing the number and size of the grooves 123 on the pressure measuring pipe 104 .

[0098] As a further improvement of the liquid phase damper for pressure measurement in this embodiment, a heat transfer balance automatic compensator 113 for dynamically balancing the amount of heat transfer is also arranged between the U-shaped elastic metal clip 114 and the pressure measuring pipeline 104. The heat transfer balance automatic compensator 113 includes setting the strip boss 116 on the clamping surface of the U-shaped elastic metal clip 114 as a trapezoidal boss, and arranging a thermal expander 115 between the bottom of the U-shaped groove 122 of the U-shaped elastic metal clip 114 and the pressure measuring pipeline 104. One end of the thermal expander 115 is fixedly connected to the bottom of the U-shaped groove 122 of the U-shaped elastic metal clip 114, and the other end of the thermal expander 115 is fixedly connected to the side of the pressure measuring pipeline 104 on the pressure measuring pipeline 114 that is opposite to the bottom of the U-shaped groove 122; the width of the trapezoidal boss gradually decreases from the bottom of the U-shaped groove 122 to the mouth of the U-shaped groove 122.

[0099] By setting the trapezoidal boss on the clamping surface of the U-shaped elastic metal clip 114, the contact area between the clamping surface of the U-shaped elastic metal clip 114 and the pressure measuring pipeline 104 can be changed. For example, when the U-shaped elastic metal clip 114 moves laterally toward the bottom of its U-shaped slot close to the pressure measuring pipeline 104, the contact area between the clamping surface of the U-shaped elastic metal clip 114 and the pressure measuring pipeline 104 will decrease, and vice versa.

[0100] When the heat transfer balance automatic compensator 113 is not provided, when the low-temperature liquid insulated tank truck experiences large fluctuations relative to the ideal ambient temperature design conditions or other interference occurs, the heat transfer balance of the heat-conducting metal parts used to achieve liquid phase damping will be broken, resulting in excessive or insufficient heat being transferred from the tank wall of the outer container 102 to the pressure measuring pipeline 104. If too little heat is transferred to the pressure measuring pipeline 104, it may be impossible to completely vaporize the low-temperature liquid introduced from the inner container into the pressure measuring pipeline 104, thereby affecting subsequent pressure measurement; if too much heat is transferred to the pressure measuring pipeline 104, although the liquid phase damping effect can be fully achieved, it will cause excess heat to remain in the insulation space 103 and transfer to the inner container 101, thereby reducing the insulation effect of the low-temperature liquid insulated tank truck, and further increasing the safety risk of a rapid increase in the internal pressure of the tank body.

[0101] After the heat transfer balance automatic compensator 113 is set, if the ambient temperature or other interference factors cause too little heat to be transferred to the pressure measuring pipeline 104, the temperature of the pressure measuring pipeline 104 will be low, and the heat expander 115 will receive less heat and will shrink and deform, driving the U-shaped elastic metal clip 114 to move synchronously (the U-shaped elastic metal clip 114 moves laterally toward the bottom of its U-shaped slot 122 close to the pressure measuring pipeline 104), so that the contact area between the clamping surface of the U-shaped elastic metal clip 114 and the pressure measuring pipeline 104 is increased, so that the heat of the tank wall of the outer container 102 will be more transferred to the pressure measuring pipeline 104, so that the temperature of the pressure measuring pipeline 104 will rise, thereby maintaining Maintain the balance of heat transfer; on the contrary, if too much heat is transferred to the pressure measuring pipe 104 due to the influence of ambient temperature or other interference factors, the temperature of the pressure measuring pipe 104 will be too high, and the heat expander 115 will obtain more heat and thus expand and deform, driving the U-shaped elastic metal clip 114 to move synchronously (the U-shaped elastic metal clip 114 moves laterally toward the bottom of its U-shaped slot 122 away from the pressure measuring pipe 104), so that the contact area between the clamping surface of the U-shaped elastic metal clip 114 and the pressure measuring pipe 104 is reduced, so that the heat of the tank wall of the outer container 102 will be less transferred to the pressure measuring pipe 104, so that the temperature of the pressure measuring pipe 104 is reduced, thereby maintaining the balance of heat transfer.

[0102] Preferably, a tension spring 119 is further connected between the cantilever ends of a pair of elastic clamping pieces 117 of the U-shaped elastic metal clip 114 .

[0103] Preferably, a hanging plate 118 is provided at the cantilever end of the elastic clamping piece 117 , a spring hook groove is provided on the hanging plate 118 , and the end of the tension spring 119 is hung on the spring hook groove of the hanging plate 118 .

[0104] As one of the preferred solutions of the thermal expander in this embodiment, the thermal expander 115 is a strip bimetallic strip. Preferably, the middle part of the strip bimetallic strip is fixedly connected to the pressure measuring pipeline 104, and the two ends of the strip bimetallic strip are respectively fixedly connected to the two sides of the bottom of the U-shaped slot 122.

[0105] As a second preferred solution of the thermal expander in this embodiment, the thermal expander 115 is a disc-shaped bimetallic strip assembly 121 formed by stacking and connecting a plurality of disc-shaped bimetallic strips into one. Preferably, the joint between two adjacent disc-shaped bimetallic strips is integrated by welding.

[0106] Preferably, the disc-shaped bimetallic strip components 121 are in two groups and are arranged at intervals along the longitudinal direction of the pressure measuring pipeline 104 .

[0107] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A cryogenic liquid insulated tank truck, characterized in that: It comprises a double-layer tank body composed of an inner container and an outer container, a walking mechanism for carrying the double-layer tank body arranged at the lower side of the rear half of the outer container tank body of the double-layer tank body, a traction pin assembly arranged at the lower side of the front of the outer container tank body for connecting with the front of the vehicle, and a supporting device arranged at the lower side of the front of the outer container tank body and located behind the traction pin assembly; wherein the traction pin assembly comprises a traction frame arranged at both sides of the lower part of the tank body outer wall of the outer container of the cryogenic liquid insulated tank truck, a traction base connected to the lower part of the traction frame, a traction chamber arranged in the traction base, and a composite elastic deformation body installed in the traction chamber, the composite elastic deformation body comprises a rigid body arranged in the traction chamber for sliding along the horizontal direction, an elastic body arranged on the rigid body, an elastic deformation connection is formed between the elastic body in the composite elastic deformation body and the traction chamber in the horizontal direction, a gap penetrating up and down is arranged on the lower wall of the traction chamber, a traction pin is vertically arranged on the rigid body in the composite elastic deformation body, and the traction pin passes downward through the gap on the lower wall of the traction chamber and then is exposed to the lower position of the traction base; Wherein, a wave-breaking device is arranged inside the inner container of the double-layer tank body, and the wave-breaking device includes a number of conical wave-breaking plates arranged at intervals in the inner container of the cryogenic liquid insulated tank truck, the conical wave-breaking plates are arranged perpendicularly to the central axis of the inner container of the cryogenic liquid insulated tank truck and connected to the tank wall of the inner container, a pair of crescent-shaped wave-breaking notches are respectively provided at the upper and lower edge positions of the outer circle of the conical wave-breaking plates, a central through hole is provided at the central part of the conical wave-breaking plates, and a circle of flanges is also provided at the central through hole part of the conical wave-breaking plates, the flange direction of the circle of flanges is arranged in the reverse direction relative to the large end cone hole of the conical wave-breaking plates, and a number of wave-breaking flow holes are also dispersedly arranged on the conical wave-breaking plates; Among them, a pair of absorbing components are arranged correspondingly at the inner walls at both ends of the inner container of the low-temperature liquid insulated tank truck near the inner container head. The absorbing components include a stainless steel lining plate arranged on the inner wall of the inner container head of the inner container, and a number of absorbing modules densely installed on the stainless steel lining plate. Each absorbing module includes a stainless steel absorbing seat ring, a stainless steel absorbing mesh fixed on the front of the stainless steel absorbing seat ring, and stainless steel wire balls filled in the absorbing mesh cover.

2. A cryogenic liquid insulated tank truck according to claim 1, characterized in that: The elastic body is an elastic rubber sleeve densely arranged in an array in the rigid body, and a transmission pin is inserted into each elastic rubber sleeve in an elastic contact manner. The upper and lower ends of the transmission pin are respectively connected to the upper side wall and the lower side wall of the traction chamber.

3. A cryogenic liquid insulated tank truck according to claim 1, characterized in that: The wave absorbing modules are also installed on both sides of the conical wave-breaking plate in a circular array arrangement.

4. A cryogenic liquid insulated tank truck according to claim 1, characterized in that: A liquid phase damper for pressure measurement is arranged on the double-layer tank body, and the liquid phase damper for pressure measurement includes a pressure measuring pipeline which is connected with the inner container of the low-temperature liquid insulated tank truck and passes through the insulating space between the inner container and the outer container of the warm liquid insulated tank truck and leads to the outside of the outer container. A heat transfer element is connected to the outer circle of a section of the pressure measuring pipeline located inside the insulating space, and the heat transfer element is connected to the inner wall of the outer container; the heat transfer element is a heat-conducting metal part which is arranged on the outer wall of the pressure measuring pipeline and contacts the outer wall of the pressure measuring pipeline.

5. A cryogenic liquid insulated tank truck according to claim 4, characterized in that: A closed cover is provided on the inner tank wall of the inner container, a section of the cryogenic liquid pipe entering the inner tank is covered by the closed cover, a gap for the cryogenic liquid to pass through is provided between one side of the closed cover and the inner tank wall of the inner container, and a flow-limiting hole for the cryogenic liquid to pass through is provided on the top of the closed cover.

6. A cryogenic liquid insulated tank truck according to claim 4, characterized in that: The heat-conducting metal part is a U-shaped elastic metal clip, and the U-shaped groove of the U-shaped elastic metal clip is clamped on the two side surfaces of the pressure measuring pipeline. Copper wires in contact with the inner wall of the outer container are respectively led out from both ends of the U-shaped elastic metal clip; a number of strip bosses for controlling excessive or insufficient heat transfer are arranged at intervals on the clamping surface of the U-shaped elastic metal clip in contact with the pressure measuring pipeline, and the two side surfaces of the pressure measuring pipeline are correspondingly in contact with the strip bosses.

7. A cryogenic liquid insulated tank truck according to claim 6, characterized in that: A heat transfer balance automatic compensator for dynamically balancing the amount of heat transfer is also arranged between the U-shaped elastic metal clip and the pressure measuring pipeline. The heat transfer balance automatic compensator includes setting the strip boss on the clamping surface of the U-shaped elastic metal clip to a trapezoidal boss, and setting a thermal expander between the bottom of the U-shaped groove of the U-shaped elastic metal clip and the pressure measuring pipeline, one end of the thermal expander is fixedly connected to the bottom of the U-shaped groove of the U-shaped elastic metal clip, and the other end of the thermal expander is fixedly connected to the side of the pressure measuring pipeline opposite to the bottom of the U-shaped groove on the pressure measuring pipeline; the width of the trapezoidal boss gradually decreases in the direction from the bottom of the U-shaped groove to the mouth of the U-shaped groove.

8. A cryogenic liquid insulated tank truck according to claim 7, characterized in that: The thermal expander is a strip-shaped bimetallic strip, or a disc-shaped bimetallic strip assembly formed by stacking and connecting a plurality of disc-shaped bimetallic strips into one body.

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