Molecular sieve adsorption chamber device for low-temperature liquid tank box tank car

Abstract

The molecular sieve adsorption chamber device comprises an inner tank body and an outer tank body, and an interlayer space is formed between the inner tank body and the outer tank body in a spaced mode. A molecular sieve adsorption chamber is arranged between the spherical tank walls of the inner tank body and the outer tank body at one end of the tank box tank car, and a space filled with molecular sieve particles is formed in the molecular sieve adsorption chamber; the molecular sieve adsorption chamber extends into the interlayer space by taking the surface of the inner tank body or the outer tank body as a bottom layer, the extension length of the molecular sieve adsorption chamber is smaller than the spacing of the interlayer space, a relatively flat molecular sieve adsorption chamber structure with large coverage area and small height is formed, and a surface layer structure for gas or moisture to pass through is formed on one side far away from the bottom layer; compared with a plurality of independent small cylinders, the large circular ring / disc structure type molecular sieve adsorption chamber has the advantages that the volume is larger, the effective contact area is greatly increased, more molecular sieves are filled, the vacuum service life can be better prolonged, and the adsorption is more sufficient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cryogenic pressure vessel, specifically relates to a kind of molecular sieve adsorption chamber device for cryogenic liquid tank box tank car. BACKGROUND

[0002] The cryogenic liquid tank box tank car is a special vehicle for transporting cryogenic liquids, such as liquid oxygen, liquid nitrogen, liquid argon, and liquefied natural gas. These liquids are usually stored and transported at extremely low temperatures to maintain their liquid form.

[0003] The tank body is usually composed of a double-layer tank body, and a vacuum interlayer space is formed between the inner layer and the outer layer to isolate external heat transfer and maintain a low-temperature environment. Maintaining the standard specified vacuum degree in the tank body of the cryogenic liquid tank box tank car is a key factor in measuring the quality of the cryogenic insulation tank product. Because other functional structural components in the vacuum interlayer often release some gas and moisture during use, the vacuum degree of the interlayer space gradually decreases, affecting the insulation performance of the container. Therefore, the existing cryogenic insulation tank usually has a gas adsorption device in the interlayer space. A typical gas adsorption device is a molecular sieve adsorber. Its working principle is to use the strong adsorption capacity of molecular sieve (a type of silicate crystal particle) for gas and moisture at low temperatures to effectively adsorb the continuously released gas and moisture in the vacuum interlayer, thereby maintaining the vacuum degree of the interlayer space from decreasing, thereby achieving the effect of long-term maintaining the vacuum degree of the interlayer space.

[0004] For example, patent application number CN201820242188.4 discloses an improved structure of a 40-foot large-volume liquefied natural gas cryogenic tank. It discloses that a concave manhole recessed cover is provided at one end of the inner layer tank body of the container, forming a small cylindrical filling space, and a molecular sieve is installed inside. The defect is that this device destroys the original round shape of the inner layer tank body. The original end circular tank body can uniformly distribute stress, and the overall strength is higher due to the good compression resistance of the dome structure of the spherical container. The setting of the concave manhole at one end of the inner layer tank body destroys the uniform distribution of stress of the tank body, reducing the compression resistance. And it occupies the internal storage space by being inwardly recessed. Secondly, the manhole is set in a point shape, and the effective area of the molecular sieve exposed in the vacuum interlayer is small, limiting the adsorption capacity of the molecular sieve. Thirdly, this design structure is not convenient for replacing and activating the molecular sieve.

[0005] In addition, since the low-temperature liquid tank box usually has a certain length, the length of the commonly used low-temperature liquid tank box is 12 meters, and the molecular sieve is arranged at one end of the tank body, so that the molecular sieve is arranged near one end of the interlayer space, and the adsorption effect of moisture and the like is good. The other end away from the molecular sieve has poor adsorption effect, and the probability of residual moisture is high, so that the vacuum degree maintenance effect of the whole interlayer space is poor.

[0006] In view of the above, it is necessary to provide a molecular sieve adsorption chamber device for a low-temperature liquid tank box tank car to solve the above problems. Content of the utility model

[0007] The utility model discloses a molecular sieve adsorption chamber device for a low-temperature liquid tank box tank car.

[0008] To achieve the above object, the technical scheme of the utility model is as follows: a molecular sieve adsorption chamber device for a low-temperature liquid tank box tank car, comprising an inner tank body and an outer tank body, the inner tank body and the outer tank body are arranged with a spacing to form an interlayer space; a molecular sieve adsorption chamber is arranged between the spherical tank wall of the inner tank body and the outer tank body at one end of the tank box tank car, and a space filled with molecular sieve particles is formed in the molecular sieve adsorption chamber; the molecular sieve adsorption chamber extends from the surface of the inner tank body or the outer tank body as a bottom layer into the interlayer space, the extension length is less than the spacing of the interlayer space, a relatively flat molecular sieve adsorption chamber structure with large coverage area and small height is formed, and a surface layer structure for gas or moisture to pass through is formed on the side away from the bottom layer;

[0009] The molecular sieve adsorption chamber further comprises a feed pipeline and a discharge pipeline, the feed pipeline is connected to the top end of the molecular sieve adsorption chamber, the discharge pipeline is connected to the bottom end of the molecular sieve adsorption chamber, and the end portions of the feed pipeline and the discharge pipeline are arranged through the outer tank body, and the end portions of the feed pipeline and the discharge pipeline outside the outer tank body are provided with sealing heads.

[0010] Further, the molecular sieve adsorption chamber further comprises an outer ring sealing plate, the outer ring sealing plate is circular, the surface layer structure comprises a faceplate with the same spherical curvature as the end portion of the tank body, the outer periphery of the faceplate is a circle same as the outer ring sealing plate, the faceplate edge is connected with the outer ring sealing plate, and the faceplate, the bottom layer and the outer ring sealing plate surround the molecular sieve adsorption chamber; the surface layer structure further comprises a plurality of through holes arranged on the faceplate and a wire mesh arranged on the inner side of the faceplate.

[0011] Further, the molecular sieve adsorption chamber comprises an outer ring sealing plate and an inner ring sealing plate, the outer ring sealing plate and the inner ring sealing plate are arranged in a concentric circle shape, the surface layer structure comprises a surface plate, the surface plate is annular, the inner ring of the surface plate is fixedly connected to the inner ring sealing plate, and the outer ring of the surface plate is fixedly connected to the outer ring sealing plate, so that the inner ring sealing plate, the outer ring sealing plate and the surface plate form the molecular sieve adsorption chamber together with the bottom layer; the surface layer structure further comprises a plurality of through holes arranged on the surface plate and a wire mesh arranged on the inner side of the surface plate.

[0012] Further, the surface layer structure further comprises a surface plate sealing structure for opening or closing the through holes on the surface layer structure; the surface plate sealing structure comprises an outer layer plate arranged on the outer side of the surface plate, the outer layer plate has the same shape as the surface plate, and the outer layer plate is provided with outer through holes corresponding to the positions of the through holes, the outer layer plate and the surface plate are arranged in parallel, and a gap space for accommodating a rotating sealing plate is formed between the outer layer plate and the surface plate; the rotating sealing plate is rotationally connected in the gap space, the rotating sealing plate is provided with air holes matched with the positions of the through holes, and the rotating sealing plate is switched between an open position and a sealing position by rotation; the air holes coincide with the positions of the through holes in the open position, and the air holes are dislocated from the positions of the through holes in the sealing position.

[0013] Further, the surface layer structure further comprises a kinetic energy structure arranged in the gap space and used for moving the moisture and gas generated in the gap space towards the molecular sieve adsorption chamber.

[0014] Further, the kinetic energy structure comprises an energizing device for charging the free moisture and gas in the gap space, and an electric field formed in the axial direction in the gap space, so that the charged free bodies move towards the molecular sieve adsorption chamber under the attraction or repulsion of the electric field.

[0015] Further, the energizing device is an electron beam generator, the electron beam generator is arranged at the other end of the gap space away from the molecular sieve adsorption chamber, and the electric field comprises a pair of parallel arranged polar plate structures, the polar plate structure comprises a positive polar plate and a negative polar plate, the positive polar plate is arranged at one end close to the molecular sieve adsorption chamber, and the negative polar plate is arranged at the other end away from the molecular sieve adsorption chamber.

[0016] Further, a plurality of groups of polar plate structures are arranged in the gap space in the axial direction of the tank body in sequence, so that the charged free bodies move towards the molecular sieve adsorption chamber in a transmission mode by sequentially passing through each polar plate structure.

[0017] Further, the kinetic energy structure is a directional ultrasonic transducer, the directional ultrasonic transducer is arranged at the other end of the gap space away from the molecular sieve adsorption chamber, and the directional ultrasonic transducer emits sound waves towards the molecular sieve adsorption chamber.

[0018] The application of a molecular sieve adsorption chamber device for a low-temperature liquid tank vehicle forms an electric field in the interlayer space between the inner tank body and the outer tank body, the direction of the electric field is parallel to the direction of the tank body axis; the free body in the interlayer space is charged by the energizing device, and the charged free body moves towards one end where the molecular sieve adsorption chamber device is arranged under the action of the electric field.

[0019] The utility model discloses the advantages and beneficial effects are:

[0020] 1. Whole big circular ring / disc structure type, is equipped with an independent filling port, improves the filling speed, reduces the molecular sieve and air contact time, makes the water content of molecular sieve greatly reduce, reduces the evacuation time, improves the tank body vacuum life.

[0021] 2. The molecular sieve adsorption chamber of big circular ring / disc structure type is bigger than the volume of multiple independent small cylinders, and the effective contact area is greatly increased, the molecular sieve is filled more, and the vacuum life can be better prolonged, so that the adsorption is more sufficient.

[0022] 3. Big circular ring structure design, compared with multiple independent small cylinders, the big circular ring structure has larger contact area with the inner sealing head, improves the activity of the molecular sieve, and can better absorb the gas released from the interlayer

[0023] 4. The big circular ring adopts a relatively thin plate design, is cut according to the shape of the sealing head, is convenient and fast to assemble, reduces the labor intensity of workers, shortens the manufacturing cycle, improves the production efficiency, saves product cost. DRAWINGS

[0024] Figure 1 It is the side view and A direction drawing of the first embodiment of the utility model;

[0025] Figure 2 It is the side view and A direction drawing of the second embodiment of the utility model;

[0026] Figure 3 It is the side view and A direction drawing of the second embodiment of the utility model; Figure 2 It is the enlarged schematic view of the middle ring of the utility model;

[0027] Figure 4 It is the side view of the lever structure in the utility model;

[0028] Figure 5 It is the schematic view of the rotary sealing plate in the utility model and located at the sealing position;

[0029] Figure 6 It is the schematic view of the rotary sealing plate in the utility model and located at the opening position;

[0030] Figure 7 It is the enlarged schematic view of the middle ring of the utility model; Figure 4

[0031] ​Figure 8 This is one of the schematic diagrams of the kinetic energy structure in the interlayer space in this utility model;

[0032] Figure 9 This is the second schematic diagram of the kinetic energy structure in the interlayer space in this utility model;

[0033] In the diagram: 1. Inner tank; 2. Outer tank; 3. Interlayer space; 4. Spherical tank wall; 5. Bottom layer; 6. Surface structure; 7. Feed line; 8. Discharge line; 9. Sealing head; 10. Outer ring sealing plate; 11. Panel; 12. Through hole; 13. Wire mesh; 14. Inner ring sealing plate; 15. Panel sealing structure; 16. Outer plate; 17. External through hole; 18. Vent hole; 19. Interlayer space; 20. Energizing device; 21. Electric field; 22. Electron beam generator 23. Positive electrode plate; 24. Negative electrode plate; 25. Electrode structure; 26. Free body; 27. Directional ultrasonic transducer; 28. Rotary sealing plate; 29. ​​Arc-shaped elongated hole; 30. Short upright rod; 31. Lever structure; 32. Rotating shaft; 33. Actuating lever; 34. Electric push rod; 35. Waist hole; 36. Pin rod; 37. First electromagnet; 38. Second electromagnet; 39. Sealing ring; 40. Molecular sieve adsorption chamber; 41. Dual electrode; 42. Perforation. Detailed Implementation

[0034] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0035] Example 1:

[0036] A molecular sieve adsorption chamber device for cryogenic liquid tank trucks, such as Figure 1 As shown in the left-hand view, the tank includes an inner tank 1 and an outer tank 2, with a space 3 formed between the inner tank 1 and the outer tank 2. A molecular sieve adsorption chamber is located between the spherical tank walls 4 of the inner tank 1 and the outer tank 2 at one end of the tank truck. This molecular sieve adsorption chamber forms a space filled with molecular sieve particles, such as... Figure 1 , 2As shown, the arc-shaped end caps of both the inner tank 1 and the outer tank 2 are spherical tank walls 4, and the two layers of spherical tank walls 4 are arranged in parallel. The molecular sieve adsorption chamber extends from the surface of the inner tank 1 or the outer tank 2 as the bottom layer 5 into the interlayer space 3. Its extension length is less than the spacing of the interlayer space 3, forming a relatively flat molecular sieve adsorption chamber structure with a large coverage area and a small height. A surface structure 6 for gas or moisture to pass through is formed on the side away from the bottom layer 5. Unlike the structure of the prior art, this embodiment does not require opening holes in the inner tank 1 and then recessing inward to set small cylindrical filling spaces. Instead, the surface of the spherical tank wall 4 is used as a bottom layer 5 of the molecular sieve adsorption chamber device, thereby simplifying the processing steps and improving the structural strength of the equipment. The molecular sieve adsorption chamber has a larger volume than multiple independent small cylinders, and more molecular sieve is filled, which can better extend the vacuum life.

[0037] like Figure 1 As shown in the left and right views, the left side is a schematic diagram of the cross section along the axial direction of the box, and the right side is a schematic diagram along direction A in the left view. The molecular sieve adsorption chamber also includes an outer ring sealing plate 10. The outer ring sealing plate 10 is circular, but it can also be elliptical. In this embodiment, a circular shape is used as an example. In specific processing, the shape can be changed according to the situation. For example, a polygonal structure can also be used. This embodiment is a preferred embodiment. Since the inner wall of the circular outer ring sealing plate 10 is also circular, it is easy for the molecular sieve to slide off. When the molecular sieve is replaced, it is easy to drain the molecular sieve inside.

[0038] The surface structure 6 includes a panel 11 with the same curvature as the spherical end of the tank. Using a panel 11 with the same curvature ensures that the panel 11 is parallel to the spherical tank wall 4 and that the spacing is appropriate. The outer periphery of the panel 11 is circular, the same as the outer ring sealing plate 10. During manufacturing, the outer ring sealing plate 10 is welded firmly to the outer periphery of the panel 11, connecting the edge of the panel 11 to the outer ring sealing plate 10. This allows the panel 11, the bottom layer 5, and the outer ring sealing plate 10 to form a molecular sieve adsorption chamber, thus creating a space at one end of the tank's interlayer space 3 that is separate from the interlayer space 3 for storing the molecular sieve. Figure 1 , 3 As shown, the surface structure 6 also includes a plurality of through holes 12 provided on the panel 11 and a wire mesh 13 attached to the inner side of the panel 11. The through holes 12 allow the molecular sieve adsorption chamber to communicate with the interlayer space 3, and the wire mesh 13 inside is used to block the molecular sieve and prevent it from leaking out of the through holes 12. It can be understood that the pore size of the wire mesh 13 should be smaller than the particle size of the molecular sieve, thereby forming a blocking effect on the molecular sieve.

[0039] Furthermore, the molecular sieve adsorption chamber also includes a feed line 7 and a discharge line 8. The feed line 7 is connected to the top of the molecular sieve adsorption chamber, and the discharge line 8 is connected to the bottom of the molecular sieve adsorption chamber. Both the feed line 7 and the discharge line 8 pass through the outer tank 2, and each has a sealing head 9 at its outer end outside the outer tank 2. After the molecular sieve reaches its replacement time, the discharge line 8 can be opened to release the molecular sieve particles. Since the discharge line 8 is connected to the lower end, it is easy to completely release the molecular sieve particles; then, new material is added. Molecular sieve particles are added to the molecular sieve adsorption chamber through the feed line 7. After adding, the sealing head 9 on the feed line 7 is closed, and then the sealing head 9 of the discharge line 8 is opened to connect a vacuum pump for vacuuming, completing the molecular sieve replacement operation.

[0040] Example 2:

[0041] This embodiment is based on the same principle as Embodiment 1, except that the molecular sieve adsorption chamber includes an outer ring sealing plate 10 and an inner ring sealing plate 14, as follows. Figure 2 As shown, the outer ring sealing plate 10 and the inner ring sealing plate 14 are arranged in a concentric circle. The surface structure 6 includes a panel 11, which is annular. Its inner ring is fixedly connected to the inner ring sealing plate 14, and its outer ring is fixedly connected to the outer ring sealing plate 10, so that the inner ring sealing plate 14, the outer ring sealing plate 10, the panel 11, and the bottom layer 5 form a molecular sieve adsorption chamber; Figure 3 As shown, the surface structure 6 also includes several through holes 12 on the panel 11 and a wire mesh 13 attached to the inner side of the panel 11. This device is located inside the tank compartment of a cryogenic liquid tank truck, installed on the front end cap of the inner container, and has a cavity volume of 70-80L, significantly larger than that of multiple independent small cylinders. This device adopts an integral large ring design to increase the contact area with the end cap. Due to the small space 3 of the tank truck's interlayer, a reasonable size structure is designed based on the arc end of the inner front end cap and the interlayer gap of the front end cap. The inner ring sealing plate 14 and the outer ring sealing plate 10 form a closed space. Uniformly spaced holes are punched on the panel 11 to facilitate gas adsorption and exchange between the molecular sieve adsorbent and the interlayer. The wire mesh 13 is installed inside the panel 11 to prevent the adsorbent from leaking out of the adsorption chamber.

[0042] The large circular ring structure design, compared to multiple independent small cylinders, provides a larger contact area with the inner end cap, enhancing the molecular sieve's activity and enabling better absorption of gases released from the interlayer. The large ring utilizes a thinner plate design, cut to the shape of the end cap, facilitating quick and easy assembly, reducing labor intensity, shortening the manufacturing cycle, increasing production efficiency, and saving product costs.

[0043] The overall large circular structure allows for the installation of only one feed line 7, which improves the molecular sieve filling speed and reduces the contact time between the molecular sieve and air compared to multiple small cylinder designs. This significantly reduces the moisture content of the molecular sieve, decreases evacuation time, and improves the vacuum life of the tank.

[0044] Example 3:

[0045] It also includes a panel 11 enclosure structure that controls the opening or closing of the through holes 12 on the surface layer structure 6; such as Figures 4-7 As shown, it includes an outer layer plate 16 disposed on the outside of the panel 11. The outer layer plate 16 has the same shape as the panel 11 and has an external through hole 17 corresponding to the position of the through hole 12. The outer layer plate 16 and the panel 11 are arranged parallel to each other, and a gap space 19 is formed between them to accommodate the rotating sealing plate 28. Based on the aforementioned embodiment, an outer layer plate 16 is added. Taking the annular design of embodiment two as an example, an outer layer plate 16 is arranged parallel to the outside of the panel 11 to form a gap space 19 between the two plates. The gap space 19 is used to seal the panel 11. It can be understood that in this embodiment, the inner and outer circumferences of the panel 11 and the outer layer plate 16 should be fully welded to the outer ring sealing plate 10 and the inner ring sealing plate 14. A rotating sealing plate 28 that can rotate at a certain angle is provided in the gap space 19. By controlling its rotation angle, the opening position and sealing position of the through hole 12 and the external through hole 17 are formed. Figure 5 As shown, the rotating sealing plate 28 is rotatably connected within the gap space 19. The rotating sealing plate 28 is provided with a vent hole 18 that matches the position of the through hole 12. The rotating sealing plate 28 switches between an open position and a sealed position by rotating. In the open position, the vent hole 18 coincides with the position of the through hole 12, and in the sealed position, the vent hole 18 is misaligned with the position of the through hole 12. Figure 5 The dashed circle indicates the vent 18 on the rotating sealing plate 28 within the gap space 19. At this point, the vent 18 is misaligned with the external through-hole 17, which is the sealing position. Figure 6 The diagram shows that after the rotating sealing plate 28 is rotated at a certain angle, the external through hole 17 and the vent hole 18 are aligned, which allows the molecular sieve adsorption chamber to connect with the interlayer space 3, which is the open position.

[0046] Specifically, as one embodiment for driving the rotation of the rotating sealing plate 28, a through arc-shaped elongated hole 29 is provided on the outer plate 16. The center of the arc-shaped elongated hole 29 coincides with the axis, and multiple arc-shaped elongated holes 29 are provided circumferentially. Short uprights 30 are provided on the rotating sealing plate 28 through the arc-shaped elongated holes 29. A lever structure 31 is provided in the interlayer space 3 to simultaneously actuate each of the short uprights 30. The lever structure 31 includes a rotating shaft 32 and a lever 33. The rotating shaft 32 is located along the axis of the tank and is rotatably connected to the middle of the end cap of the inner tank 1. Multiple levers 33 are distributed and connected around the rotating shaft 32, such as... Figure 6 As shown, four actuating levers 33 are arranged in a cross shape, and the number can be increased or decreased as needed. The actuating levers 33 have an arc shape, and preferably the same arc as the tank head, so that the actuating levers 33 can rotate freely within the interlayer space 3. The end of the actuating lever 33 is connected to the short upright 30, so when the actuating lever 33 rotates, it can control the rotation of the rotating sealing plate 28. Furthermore, an electric push rod 34 can be installed in the interlayer space 3, with one end of the electric push rod 34 hinged to the surface of the inner tank 1, and the other end hinged to the end of one of the actuating levers 33, such as... Figure 6 As shown, the rotation of the rotating sealing plate 28 can be electrically controlled to open or close the molecular sieve adsorption chamber.

[0047] If the sealing effect of the external through hole 17 is not ideal by simply rotating the switch, as an improvement, the rotating sealing plate 28 is designed to have a certain degree of sliding freedom along the axial direction within the gap space 19, when located as... Figure 5 When the sealing position is reached, the rotating sealing plate 28 is controlled to move towards the outer plate 16 and press against it for sealing. It can be understood that since there is a certain negative pressure in the interlayer space 3, when the molecular sieve is replaced, the internal pressure of the molecular sieve adsorption chamber increases when the sealing head 9 is opened. Under the action of pressure, the rotating sealing plate 28 can be pushed towards the outer plate 16 and pressed to help strengthen the sealing effect. Since it is necessary to cooperate with the axial sliding of the rotating sealing plate 28, in this embodiment, the end of the short upright 30 is provided with a waist hole 35, and the actuating rod 33 is provided with a pin 36 inserted into the waist hole 35, so that the rotating sealing plate 28 can slide freely and can achieve rotation control.

[0048] Preferably, to enhance the sealing effect, such as Figure 7 As shown, a first electromagnet 37 is provided around the outer periphery of the vent 18 facing the rotating sealing plate 28, and a second electromagnet 38 is also provided at the position where the rotating sealing plate 28 overlaps with the vent 18. When in the sealed position, energizing the electromagnets on both sides causes them to generate opposite magnetisms, thus making them fit more tightly. Preferably, a sealing ring 39 can be added to the side where the electromagnets on both sides are close to each other. Figure 7As shown in the right figure, when the rotating sealing plate 28 is magnetically attracted and adhered to the outer plate 16, and the two sealing rings 39 are squeezed tightly together, the first step of sealing is achieved. Then, the sealing head 9 is opened, and the internal pressure increases after the pressure enters. The second step of sealing is then performed using the pressure, thus achieving a complete seal. This reduces the probability of external air entering the interlayer space 3 during the replacement of the molecular sieve. Furthermore, when vacuuming the molecular sieve again after the replacement is completed, only the molecular sieve adsorption chamber needs to be evacuated, which also saves a lot of time.

[0049] It also includes a kinetic energy structure set in the interlayer space 3 to move the moisture and gas generated in the interlayer space 3 toward the end where the molecular sieve adsorption chamber is set.

[0050] Example 4:

[0051] As an application of a kinetic energy structure formed by an electric field 21 within the interlayer space 3, the kinetic energy structure includes an energy-generating device 20 that charges the free water and gas within the interlayer space 3, such as... Figure 8 As shown, the empowering device 20 is an electron beam generator 22, which is located at the other end of the interlayer space 3 away from the molecular sieve adsorption chamber. The electron beam generator 22 emits an electron beam to bombard the free body 26, causing the free liquid molecules and gas molecules to absorb electrons and become negatively charged.

[0052] Furthermore, an electric field 21 is formed along the axial direction within the interlayer space 3. This electric field 21 includes parallel paired electrode structures 25, each comprising a positive electrode 23 and a negative electrode 24. The positive electrode 23 is disposed near the molecular sieve adsorption chamber, and the negative electrode 24 is disposed away from the molecular sieve adsorption chamber. Figure 8 As shown, a positive electrode plate 23 is disposed at the left end of the interlayer space 3, and a negative electrode plate 24 is disposed at the right end. A voltage is applied between the two parallel electrodes to form a uniform electric field 21. Under the action of the electric field 21, the charged free body 26 will move towards the electrode with the opposite charge. It is understood that in this embodiment, insulating material should be coated on both sides of the interlayer space 3 to prevent the tank from affecting the electric field 21. It is understood that in this embodiment, the molecular sieve adsorption chamber is preferably disposed between the two substrates, so that the free body 26 can pass through the molecular sieve adsorption chamber when moving, thus facilitating adsorption. Under the action of the electric field 21, the charged free body 26 moves towards the molecular sieve adsorption chamber end under the attractive or repulsive force of the electric field 21.

[0053] As an improvement, the interlayer space 3 is provided with several sets of electrode structures 25 arranged sequentially along the axial direction of the tank, so that the charged free body 26 passes through each electrode structure 25 in sequence to form a transmission motion and move towards the molecular sieve adsorption chamber. Since the tank is approximately 12 meters long, its length is relatively long, and electrode plates are only set at both ends of the tank. Because the larger the electrode spacing, the smaller the electric field 21 strength under the same voltage. Therefore, if a certain electric field 21 strength needs to be maintained, the voltage needs to be increased when the electrode spacing is large. As an improvement, preferably, it is configured as follows: Figure 9 The diagram shows multiple electrode structures 25 connected in series. A double electrode 41 is configured between two adjacent electrode structures 25, with one side being a positive electrode 23 and the other side being a negative electrode 24. A perforation 42 is provided in the middle of the double electrode 41 for the free body 26 to pass through. Figure 9 The several sequentially arranged substrate structures shown are powered sequentially from right to left, so that the free body 26 passing between them gradually obtains propulsion power. The free body 26 passes through and enters the next stage electrode structure 25. After passing through each stage, it finally moves to the leftmost electrode structure 25, where a molecular sieve adsorption chamber 40 is set, thereby realizing the transport of the free body 26 from one end of the tank to the other over a relatively long distance.

[0054] Example 5:

[0055] As an application of a kinetic energy structure composed of ultrasound within the interlayer space 3, Figure 8 For example, in this case, no electrode plate is required in the diagram. The kinetic energy structure is a directional ultrasonic transducer 27, which is located at the other end of the interlayer space 3 away from the molecular sieve adsorption chamber. The sound waves emitted by the directional ultrasonic transducer 27 are directed towards the molecular sieve adsorption chamber 40. Only an ultrasonic transducer is used in the interlayer space 3 to emit ultrasonic waves directionally. The kinetic energy of the sound waves drives the free body 26 to move towards the molecular sieve adsorption chamber.

[0056] Understandably, in a perfect vacuum, sound waves have no propagation medium. Therefore, if the vacuum level in the interlayer space 3 is good, meaning there are virtually no free bodies 26 inside, the directional ultrasonic transducer 27 is essentially ineffective and unnecessary. Once the vacuum level in the interlayer space 3 decreases, meaning a rarefied medium forms within it, the sound waves emitted by the ultrasonic transducer can then act as a driving force, pushing the free bodies 26 towards the separation sieve adsorption chamber side, thereby improving the vacuum level in the interlayer space 3.

[0057] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A molecular sieve adsorption chamber device for cryogenic liquid tank trucks, comprising an inner tank (1) and an outer tank (2), wherein a sandwich space (3) is formed between the inner tank (1) and the outer tank (2) at an interval; characterized in that, A molecular sieve adsorption chamber is set between the spherical tank wall (4) of the inner tank (1) and the outer tank (2) at one end of the tank truck. A space filled with molecular sieve particles is formed in the molecular sieve adsorption chamber. The molecular sieve adsorption chamber extends from the surface of the inner tank (1) or the outer tank (2) as the bottom layer (5) into the interlayer space (3). Its extension length is less than the spacing of the interlayer space (3), forming a relatively flat molecular sieve adsorption chamber structure with a large coverage area and a small height. A surface layer structure (6) for gas or water to pass through is formed on the side away from the bottom layer (5). The molecular sieve adsorption chamber also includes a feed line (7) and a discharge line (8). The feed line (7) is connected to the top of the molecular sieve adsorption chamber, and the discharge line (8) is connected to the bottom of the molecular sieve adsorption chamber. The ends of the feed line (7) and the discharge line (8) are both set through the outer tank (2). The feed line (7) and the discharge line (8) are both provided with a sealing head (9) at one end outside the outer tank (2).

2. The molecular sieve adsorption chamber device for cryogenic liquid tank trucks according to claim 1, characterized in that, The molecular sieve adsorption chamber also includes an outer ring sealing plate (10), which is circular. The surface structure (6) includes a panel (11) with the same spherical curvature as the end of the tank. The outer periphery of the panel (11) is the same circle as the outer ring sealing plate (10), so that the edge of the panel (11) is connected to the outer ring sealing plate (10), and the panel (11), the bottom layer (5), and the outer ring sealing plate (10) form a molecular sieve adsorption chamber. The surface structure (6) also includes several through holes (12) provided on the panel (11) and a wire mesh (13) attached to the inner side of the panel (11).

3. The molecular sieve adsorption chamber device for cryogenic liquid tank trucks according to claim 1, characterized in that, The molecular sieve adsorption chamber includes an outer ring sealing plate (10) and an inner ring sealing plate (14). The outer ring sealing plate (10) and the inner ring sealing plate (14) are arranged in a concentric circle. The surface structure (6) includes a panel (11). The panel (11) is annular, with its inner ring fixedly connected to the inner ring sealing plate (14) and its outer ring fixedly connected to the outer ring sealing plate (10), so that the inner ring sealing plate (14), the outer ring sealing plate (10), the panel (11) and the bottom layer (5) form a molecular sieve adsorption chamber. The surface structure (6) also includes several through holes (12) provided on the panel (11) and a wire mesh (13) attached to the inner side of the panel (11).

4. A molecular sieve adsorption chamber device for cryogenic liquid tank trucks according to claim 2 or 3, characterized in that, It also includes a panel (11) sealing structure that controls the opening or closing of the through hole (12) on the surface layer structure (6); it includes an outer layer plate (16) disposed on the outside of the panel (11), the outer layer plate (16) having the same shape as the panel (11), and having an external through hole (17) corresponding to the position of the through hole (12). The outer layer plate (16) and the panel (11) are arranged in parallel and form a gap space (19) between them to accommodate the rotating sealing plate (28); the rotating sealing plate (28) is rotatably connected in the gap space (19), and the rotating sealing plate (28) has a vent hole (18) that matches the position of the through hole (12). The rotating sealing plate (28) switches between the open position and the sealed position by rotation; when the open position is open, the vent hole (18) coincides with the position of the through hole (12), and when the sealed position is sealed, the vent hole (18) is misaligned with the position of the through hole (12).

5. The molecular sieve adsorption chamber device for cryogenic liquid tank trucks according to claim 1, characterized in that, It also includes a kinetic energy structure set in the interlayer space (3) for moving the moisture and gas generated in the interlayer space (3) toward the end where the molecular sieve adsorption chamber is set.

6. The molecular sieve adsorption chamber device for cryogenic liquid tank trucks according to claim 5, characterized in that, The kinetic energy structure includes an energy-generating device (20) that charges the free water and gas in the interlayer space (3), and an electric field (21) formed in the interlayer space (3) along the axial direction, causing the charged free body (26) to move towards the end of the molecular sieve adsorption chamber under the attraction or repulsion of the electric field (21).

7. The molecular sieve adsorption chamber device for cryogenic liquid tank trucks according to claim 6, characterized in that, The empowering device (20) is an electron beam generator (22), which is located at the other end of the interlayer space (3) away from the molecular sieve adsorption chamber. The electric field (21) includes parallel paired electrode structures (25), which include a positive electrode (23) and a negative electrode (24). The positive electrode (23) is located at the end close to the molecular sieve adsorption chamber, and the negative electrode (24) is located at the end away from the molecular sieve adsorption chamber.

8. A molecular sieve adsorption chamber device for cryogenic liquid tank trucks according to claim 7, characterized in that, The interlayer space (3) is provided with several sets of electrode structures (25) arranged in sequence along the axial direction of the tank, so that the charged free body (26) passes through each electrode structure (25) in sequence to form a transmission motion and move towards the molecular sieve adsorption chamber.

9. A molecular sieve adsorption chamber device for cryogenic liquid tank trucks according to any one of claims 6-8, characterized in that, An electric field (21) is formed in the interlayer space (3) between the inner tank (1) and the outer tank (2), and the direction of the electric field (21) is parallel to the direction of the tank axis. The free body (26) in the interlayer space (3) is charged by the energy-generating device (20), and the charged free body (26) moves toward the end where the molecular sieve adsorption chamber is set under the action of the electric field (21).

10. A molecular sieve adsorption chamber device for cryogenic liquid tank trucks according to claim 5, characterized in that, The kinetic energy structure is a directional ultrasonic transducer (27), which is located at the other end of the interlayer space (3) away from the molecular sieve adsorption chamber. The sound waves emitted by the directional ultrasonic transducer (27) are directed toward the molecular sieve adsorption chamber.

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