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 invention relates to the technical field of cryogenic pressure vessels, and in particular to a molecular sieve adsorption chamber device for a low-temperature liquid tank truck. Background Art

[0002] A cryogenic liquid tank truck is a special vehicle designed to transport cryogenic liquids such as liquid oxygen, liquid nitrogen, liquid argon, liquefied natural gas, etc. 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 the external heat transfer and maintain a low temperature environment. In the tank body of the cryogenic liquid tank container tank truck, maintaining the vacuum degree specified by the standard is a key factor in measuring the quality of the cryogenic insulated tank product. Since other functional structural parts in the vacuum interlayer often release some gas and moisture during use, the vacuum degree of the interlayer space gradually decreases, thereby affecting the insulation performance of the container. For this reason, the existing cryogenic insulated tank is usually provided with a gas adsorption device in the interlayer space. The typical gas adsorption device is a molecular sieve adsorber, and its working principle is to utilize the strong adsorption capacity of molecular sieve (a silicate crystal particle) for gas and moisture at low temperature to effectively adsorb the gas and moisture continuously released in the vacuum interlayer, thereby maintaining the vacuum degree of the interlayer space from decreasing, thereby achieving the effect of maintaining the vacuum degree of the interlayer space for a long time.

[0004] For example, patent application number: CN201820242188.4 discloses an improved structure of a 40-foot large-volume liquefied natural gas cryogenic tank container. It discloses that a concave manhole concave cover is set at one end of the inner tank body of the container to form a small cylindrical filling space, and a molecular sieve is installed inside it. Its defect is that the device destroys the original round shape of the inner tank body. The original round tank body at the end can evenly distribute stress, and because the arched structure of the spherical container has good compressive resistance, the overall strength is high. The concave manhole is set at one end of the inner tank body, thereby destroying the uniform distribution of tank stress and reducing the compressive resistance; and its inward depression occupies the internal storage space. Secondly, the manhole is set in a point-like setting, and the effective area of ​​the molecular sieve inside it that is actually exposed to the vacuum interlayer is small, which limits the adsorption capacity of the molecular sieve. Thirdly, this design structure is not convenient for the replacement and activation of the molecular sieve.

[0005] In addition, since the cryogenic liquid tank usually has a certain length, the commonly used low liquid tank is 12 meters long, and the molecular sieve is set at one end of the tank body, so for the long interlayer space, the molecular sieve is set near one end, which has a better adsorption effect on moisture. The other end far away from the molecular sieve has a poor adsorption effect, and the probability of residual moisture is higher, so that the vacuum maintenance effect of the entire interlayer space is poor.

[0006] In view of the above, it is necessary to propose a molecular sieve adsorption chamber device for a cryogenic liquid tank truck to solve the above problems. Summary of the invention

[0007] The object of the present invention is to overcome the defects in the prior art and provide a molecular sieve adsorption chamber device for a low-temperature liquid tank truck.

[0008] To achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a molecular sieve adsorption chamber device for a low-temperature liquid tank truck, comprising an inner tank body and an outer tank body, wherein the inner tank body and the outer tank body are spaced apart to form a sandwich space; 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 truck, 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 sandwich space, and its extension length is less than the spacing of the sandwich space, forming a relatively flat molecular sieve adsorption chamber structure with a large coverage area and a small height, and a surface layer structure for gas or water to pass through is formed on the side away from the bottom layer; The molecular sieve adsorption chamber also includes a feed pipeline and a discharge pipeline, wherein the feed pipeline is connected to the top end of the molecular sieve adsorption chamber, and the discharge pipeline is connected to the bottom end of the molecular sieve adsorption chamber, and the ends of the feed pipeline and the discharge pipeline are both arranged through the outer tank body, and the feed pipeline and the discharge pipeline are both provided with sealing heads at one end outside the outer tank body.

[0009] Furthermore, the molecular sieve adsorption chamber also includes an outer ring sealing plate, which is circular. The surface layer structure includes a panel with the same spherical curvature as the end of the tank body, and the outer periphery of the panel is the same circle as the outer ring sealing plate, so that the edge of the panel is connected to the outer ring sealing plate, so that the panel, the bottom layer and the outer ring sealing plate enclose a molecular sieve adsorption chamber; the surface layer structure also includes a plurality of through holes arranged on the panel and a wire mesh arranged on the inner side of the panel.

[0010] Furthermore, the molecular sieve adsorption chamber includes an outer ring sealing plate and an inner ring sealing plate, and the outer ring sealing plate and the inner ring sealing plate are arranged in concentric circles. The surface layer structure includes a panel, and the panel is annular, and its inner circle is fixedly connected to the inner ring sealing plate, and its outer circle is fixedly connected to the outer ring sealing plate, so that the inner ring sealing plate, the outer ring sealing plate, the panel and the bottom layer enclose a molecular sieve adsorption chamber; the surface layer structure also includes a plurality of through holes arranged on the panel and a wire mesh arranged on the inner side of the panel.

[0011] Furthermore, it also includes a panel closing structure for controlling the opening or closing of the through holes on the surface structure; it includes an outer plate arranged on the outside of the panel, the outer plate has the same shape as the panel, and is provided with outer through holes corresponding to the positions of the through holes, the outer plate and the panel are arranged in parallel and a gap space for accommodating a rotating sealing plate is formed therebetween; the rotating sealing plate is rotatably connected in the gap space, and a ventilation hole is provided on the rotating sealing plate that matches the position of the through hole, and the rotating sealing plate switches between an open position and a sealed position by rotation; in the open position, the ventilation hole coincides with the position of the through hole, and in the sealed position, the ventilation hole and the through hole are offset.

[0012] Furthermore, it also includes a kinetic energy structure arranged in the interlayer space for moving the moisture and gas generated in the interlayer space toward the end of the molecular sieve adsorption chamber.

[0013] Furthermore, the kinetic energy structure includes an energizing device for charging the free moisture and gas in the interlayer space, and an electric field formed along the axial direction in the interlayer space, so that the charged free bodies move toward the end of the molecular sieve adsorption chamber under the attraction or repulsion of the electric field.

[0014] Furthermore, the energizing device is an electron beam generator, which is arranged at the other end of the interlayer space away from the molecular sieve adsorption chamber, and the electric field includes a plate structure arranged in parallel pairs, and the plate structure includes a positive plate and a negative plate. The positive plate is arranged at one end close to the molecular sieve adsorption chamber, and the negative plate is arranged at an end away from the molecular sieve adsorption chamber.

[0015] Furthermore, the interlayer space is provided with a plurality of sets of plate structures arranged in sequence along the axial direction of the tank body, so that the charged free bodies pass through the plate structures in sequence to form a transfer motion and move toward the molecular sieve adsorption chamber.

[0016] Furthermore, the kinetic energy structure is a directional ultrasonic transducer, which is arranged in the interlayer space at the other end away from the molecular sieve adsorption chamber, and the direction of the sound waves emitted by the directional ultrasonic transducer is toward the molecular sieve adsorption chamber.

[0017] An application of a molecular sieve adsorption chamber device for a low-temperature liquid tank tank truck forms an electric field in the interlayer space between an inner tank body and an outer tank body, and the direction of the electric field is parallel to the axis direction of the tank body; the free bodies in the interlayer space are charged by an enabling device, and the charged free bodies move toward one end of the molecular sieve adsorption chamber device under the action of the electric field.

[0018] The advantages and beneficial effects of the present invention are: 1. The overall large ring / disc structure is equipped with an independent filling port, which increases the filling speed, reduces the contact time between the molecular sieve and the air, greatly reduces the moisture content of the molecular sieve, reduces the evacuation time, and increases the vacuum life of the tank.

[0019] 2. The molecular sieve adsorption chamber with large ring / disc structure has a larger volume than multiple independent small cylinders, the effective contact area is greatly increased, and the molecular sieve is filled with more, which can better extend the vacuum life and make the adsorption more sufficient.

[0020] 3. The large ring structure design has a larger contact area with the inner head compared to multiple independent small cylinders, which improves the activity of the molecular sieve and can better absorb the gas released from the interlayer. 4. The large ring adopts a thinner plate design and is cut according to the shape of the head. It is easy and quick to assemble, reducing the labor intensity of workers, shortening the manufacturing cycle, improving production efficiency and saving product costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a side view and an A-direction view of the first embodiment of the present invention; Figure 2 is a side view and an A-direction view of a second embodiment of the present invention; Figure 3 The present invention Figure 2 A magnified schematic diagram of the center circle; Figure 4 is a side view of the lever structure of the present invention; Figure 5 is a schematic diagram of the rotary sealing plate in the present invention being located at a sealing position; Figure 6 is a schematic diagram of the rotary sealing plate in the present invention being in an open position; Figure 7 The present invention Figure 4 A magnified schematic diagram of the center circle; Figure 8 It is one of the schematic diagrams of the kinetic energy structure in the interlayer space of the present invention; Fig. 9 This is the second schematic diagram of the kinetic energy structure in the interlayer space of the present invention; In the figure: 1. Inner tank body; 2. Outer tank body; 3. Interlayer space; 4. Spherical tank wall; 5. Bottom layer; 6. Surface structure; 7. Feed pipeline; 8. Discharge pipeline; 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. Outer through hole; 18. Vent hole; 19. Crack space; 20. Enabling device; 21. Electric field; 22. Electron beam generator device; 23, positive plate; 24, negative plate; 25, plate structure; 26, free body; 27, directional ultrasonic transducer; 28, rotating sealing plate; 29, arc-shaped long hole; 30, short vertical rod; 31, lever structure; 32, rotating shaft; 33, 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, double electrode; 42, perforation. DETAILED DESCRIPTION

[0022] 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.

[0023] Embodiment 1: A molecular sieve adsorption chamber device for a cryogenic liquid tank truck, such as Figure 1 As shown in the left side view, it includes an inner tank body 1 and an outer tank body 2, and a sandwich space 3 is formed between the inner tank body 1 and the outer tank body 2; a molecular sieve adsorption chamber is arranged between the spherical tank wall 4 of the inner tank body 1 and the outer tank body 2 at one end of the tank tank truck, and a space filled with molecular sieve particles is formed in the molecular sieve adsorption chamber, as shown in FIG. Figure 1 , 2 As shown, the arc-shaped heads of the inner tank body 1 and the outer tank body 2 at the head end of the tank body are both spherical tank walls 4, and the two layers of spherical tank walls 4 are arranged in parallel; the molecular sieve adsorption chamber is extended into the interlayer space 3 by the surface of the inner tank body 1 or the outer tank body 2 as the bottom layer 5, and 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, and a surface layer structure 6 for gas or moisture to pass through is formed on the side away from the bottom layer 5; different from the structure of the prior art, this embodiment does not need to open a hole on the inner tank body 1 and then recess it inward to set a small cylindrical filling space, but uses the surface of the spherical tank wall 4 as a bottom layer 5 surface 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 a plurality of independent small cylinders, and can be filled with more molecular sieves, which can better extend the vacuum life.

[0024] like Figure 1As shown in the left and right views, the left side is a schematic diagram of the axial section of the box body, and the right side is a schematic diagram of the A direction in the left figure. The molecular sieve adsorption chamber also includes an outer ring sealing plate 10. The outer ring sealing plate 10 is circular or elliptical. This embodiment takes the circle as an example. During 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 convenient for the molecular sieve to slide down, and the internal molecular sieve can be easily discharged when the molecular sieve is replaced.

[0025] The surface structure 6 includes a panel 11 with the same curvature as the spherical surface at the end of the tank body. The panel 11 with the same curvature can keep the panel 11 parallel to the spherical tank wall 4 and at an appropriate distance. The outer periphery of the panel 11 is the same circle as the outer ring sealing plate 10. During production, the outer ring sealing plate 10 and the outer periphery of the panel 11 are welded firmly so that the edge of the panel 11 is connected to the outer ring sealing plate 10, so that the panel 11, the bottom layer 5 and the outer ring sealing plate 10 enclose a molecular sieve adsorption chamber, thereby forming a storage space for the molecular sieve to be stored at one end of the tank interlayer space 3, which is separated from the interlayer space 3; Figure 1 , 3 As shown, the surface structure 6 also includes a plurality of through holes 12 arranged on the panel 11 and a wire mesh 13 arranged on the inner side of the panel 11. The through holes 12 are arranged so that the molecular sieve adsorption chamber can be connected with the interlayer space 3, and the wire mesh 13 is arranged inside to block the molecular sieve to prevent the molecular sieve from leaking out of the through holes 12. It can be understood that the pores 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.

[0026] Furthermore, the molecular sieve adsorption chamber also includes a feed pipeline 7 and a discharge pipeline 8, wherein the feed pipeline 7 is connected to the top of the molecular sieve adsorption chamber, and the discharge pipeline 8 is connected to the bottom of the molecular sieve adsorption chamber, and the ends of the feed pipeline 7 and the discharge pipeline 8 are both arranged through the outer tank body 2, and the feed pipeline 7 and the discharge pipeline 8 are both provided with a sealing head 9 at one end outside the outer tank body 2. After the molecular sieve reaches the replacement time, the discharge pipeline 8 can be opened to release the molecular sieve particles. Since the discharge pipeline 8 is connected to the lower end, it is convenient to release the molecular sieve particles; then new materials are added. The molecular sieve material particles are added into the molecular sieve adsorption chamber through the feed pipeline 7. After the filling is completed, the sealing head 9 on the feed pipeline 7 is closed, and then the sealing head 9 of the discharge pipeline 8 is opened to connect the vacuum pump for vacuuming to complete the operation of replacing the molecular sieve.

[0027] Embodiment 2: The principle of this embodiment is the same as that of the first embodiment, except that the molecular sieve adsorption chamber comprises an outer ring sealing plate 10 and an inner ring sealing plate 14. Figure 2As shown, the outer ring sealing plate 10 and the inner ring sealing plate 14 are arranged in a concentric circle, and the surface layer structure 6 includes a panel 11, which is annular, and its inner circle is fixedly connected to the inner ring sealing plate 14, and its outer circle 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 a plurality of through holes 12 arranged on the panel 11 and a wire mesh 13 arranged on the inner side of the panel 11. The device is located inside the tank interlayer of the cryogenic liquid tank tank truck and is installed on the front head of the inner container. The cavity volume can reach 70~80L, which is much larger than the volume of multiple independent small cylinders. The device adopts an overall large circular ring type to increase the contact area with the head. Because the interlayer space 3 of the tank tank truck is small, the arc end of the inner front head is used to design a reasonable size structure according to the interlayer gap of the front end head. The inner ring sealing plate 14 and the outer ring sealing plate 10 are surrounded by a circle to form a closed space. The panel 11 is evenly perforated to facilitate gas adsorption 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 from the adsorption chamber.

[0028] The large ring structure design has a larger contact area with the inner head compared to multiple independent small cylinders, which improves the activity of the molecular sieve and can better absorb the gas released from the interlayer. The large ring adopts a thinner plate design, which is cut according to the shape of the head, making it easy and quick to assemble, reducing the labor intensity of workers, shortening the manufacturing cycle, improving production efficiency, and saving product costs.

[0029] The overall large circular ring structure can be provided with only one feed pipeline 7, which increases the molecular sieve filling speed compared to the design with multiple small cylinders, reduces the contact time between the molecular sieve and the air, greatly reduces the moisture content of the molecular sieve, reduces the evacuation time, and increases the vacuum life of the tank.

[0030] Embodiment three: It also includes a panel 11 closure structure for controlling the opening or closing of the through hole 12 on the surface layer structure 6; Figure 4-7As shown, it includes an outer plate 16 arranged on the outside of the panel 11. The outer plate 16 has the same shape as the panel 11, and is provided with an outer through hole 17 corresponding to the position of the through hole 12. The outer plate 16 and the panel 11 are arranged in parallel and a gap space 19 for accommodating a rotating sealing plate 28 is formed therebetween. The outer plate 16 is added on the basis of the aforementioned embodiment. Taking the annular design of the second embodiment as an example, the outer plate 16 is arranged in parallel on the outside of the panel 11 to form a gap space 19 between the two plates, and the panel 11 is sealed by the gap space 19. It can be understood that in this embodiment, the inner and outer peripheries of the panel 11 and the outer plate 16 should be fully welded and sealed to the outer ring sealing plate 10 and the inner ring sealing plate 14; a rotating sealing plate 28 that can rotate by a certain angle is provided in the gap space 19, and the opening position and the sealing position of the through hole 12 and the outer through hole 17 are formed by controlling its rotation angle, as shown in FIG. Figure 5 As shown, the rotating sealing plate 28 is rotatably connected in the gap space 19, and a vent hole 18 matching the position of the through hole 12 is provided on the rotating sealing plate 28. The rotating sealing plate 28 switches between the open position and the sealed position by rotation; 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 offset from the position of the through hole 12. Figure 5 The dotted circle in the middle shows the vent hole 18 on the rotating sealing plate 28 in the gap space 19. At this time, the position of the vent hole 18 is misaligned with the position of the outer through hole 17, which is the sealing position; Figure 6 As shown in the figure, after the rotary sealing plate 28 is rotated by a certain angle, the positions of the outer through hole 17 and the vent hole 18 coincide with each other, and at this time, the interior of the molecular sieve adsorption chamber can be connected with the interlayer space 3, which is the open position.

[0031] Specifically, as an embodiment of driving the rotating sealing plate 28 to rotate, a through arc-shaped long hole 29 is provided on the outer plate 16, the center of the arc-shaped long hole 29 coincides with the axis, and the arc-shaped long hole 29 is provided with multiple circumferentially, and a short vertical rod 30 is provided through the arc-shaped long hole 29 on the rotating sealing plate 28, and a lever structure 31 for simultaneously shifting each short vertical rod 30 is provided in the interlayer space 3, and the lever structure 31 includes a rotating shaft 32 and a shifting rod 33, and the rotating shaft 32 is arranged along the axis of the tank body and is rotatably connected to the middle part of the head of the inner tank body 1, and multiple shifting rods 33 are distributed and connected around the rotating shaft 32, such as Figure 6As shown, four toggle rods 33 are arranged in a cross shape, and the arrangement can be increased or decreased according to the situation; the structure of the toggle rod 33 is arc-shaped, and preferably has the same arc as the tank head, so that the toggle rod 33 can rotate freely in the interlayer space 3. The end of the toggle rod 33 is connected to the short vertical rod 30, so when the toggle rod 33 rotates, the rotation of the rotary sealing plate 28 can be controlled. Further, an electric push rod 34 can be arranged in the interlayer space 3, one end of the electric push rod 34 is hingedly arranged on the surface of the inner tank body 1, and the other end is hingedly arranged at the end of a toggle rod 33, as shown in FIG. Figure 6 As shown, the molecular sieve adsorption chamber can be opened or closed by electrically controlling the rotation of the rotary sealing plate 28.

[0032] If the sealing effect of the external through hole 17 by the rotary switch alone is not satisfactory, as an improvement, the rotary sealing plate 28 is designed to have a certain sliding freedom in the slit space 19 along the axial direction. Figure 5 When the sealing position is reached, the rotating sealing plate 28 is controlled to move toward the outer plate 16 and seal tightly; it can be understood that since the interlayer space 3 originally has a certain negative pressure, when the molecular sieve is replaced, when the sealing head 9 is opened, the internal pressure of the molecular sieve adsorption chamber increases, and under the action of pressure, the rotating sealing plate 28 can be pushed toward the outer plate 16 and pressed to assist in strengthening the sealing effect; since it is necessary to cooperate with the axial sliding of the rotating sealing plate 28, in this embodiment, a waist hole 35 is provided at the end of the short vertical rod 30, and the toggle rod 33 is provided with a pin rod 36 inserted into the waist hole 35, so that the rotating sealing plate 28 can slide freely and can achieve rotation control.

[0033] Preferably, in order to enhance the sealing effect, as Figure 7 As shown, a circle of first electromagnets 37 is provided on the outer periphery of the vent hole 18 facing the rotating sealing plate 28, and a circle of second electromagnets 38 is also provided at the position where the rotating sealing plate 28 and the vent hole 18 overlap. When in the sealing position, the electromagnets on both sides are energized to generate different magnetic properties, thereby fitting more closely; preferably, a sealing ring 39 can be further provided on the side where the electromagnets on both sides are close to each other, such as Figure 7 As shown in the figure on the right, when the sealing plate 28 is rotated and pressed against the outer plate 16 under magnetic adsorption, and the two sealing rings 39 are squeezed and tightly fitted, the first step of sealing is achieved, and then the sealing head 9 is opened. After the pressure enters, the internal pressure increases, and the pressure is used to perform the second step of sealing, thereby achieving a complete sealing effect, thereby reducing the probability of external air entering the interlayer space 3 during the molecular sieve replacement process, and after the molecular sieve is replaced, when the molecular sieve is vacuumed again, it is only necessary to evacuate the molecular sieve adsorption chamber, which will also save a lot of time.

[0034] It also includes a kinetic energy structure arranged in the interlayer space 3 for moving the moisture and gas generated in the interlayer space 3 toward the end of the molecular sieve adsorption chamber.

[0035] Embodiment 4: As an application of a kinetic energy structure formed by an electric field 21 in the interlayer space 3, the kinetic energy structure includes an energizing device 20 for charging the free water and gas in the interlayer space 3, such as Figure 8 As shown, the energizing device 20 is an electron beam generator 22, which is arranged at the other end of the interlayer space 3 away from the molecular sieve adsorption chamber. The electron beam generator 22 is used to emit an electron beam to bombard the free body 26, so that the free liquid molecules and gas molecules absorb electrons and carry negative charges.

[0036] And an electric field 21 is formed in the interlayer space 3 along the axial direction, and the electric field 21 includes a parallel pair of electrode plates 25, and the electrode plates 25 include a positive electrode plate 23 and a negative electrode plate 24. The positive electrode plate 23 is arranged at one end close to the molecular sieve adsorption chamber, and the negative electrode plate 24 is arranged at one end away from the molecular sieve adsorption chamber. Figure 8 As shown, a positive plate 23 is arranged at the left end of the interlayer space 3, and a negative plate 24 is arranged at the right end, and a voltage is applied between the two parallel electrodes to form a uniform electric field 21. The charged free body 26 will move toward the electrode of opposite charge under the action of the electric field 21; it is understandable that in this embodiment, insulating materials should be coated on both sides of the interlayer space 3 to prevent the tank from affecting the electric field 21. It is understandable that in this embodiment, the molecular sieve adsorption chamber is preferably arranged between the two substrates, and when the free body 26 moves, it can pass through the molecular sieve adsorption chamber to facilitate adsorption. Under the action of the electric field 21, the charged free body 26 moves to the end of the molecular sieve adsorption chamber under the attraction or repulsion of the electric field 21.

[0037] As an improvement, the interlayer space 3 is provided with a plurality of sets of plate structures 25 arranged in sequence along the axial direction of the tank body, so that the charged free body 26 passes through each plate structure 25 in sequence to form a transfer motion and moves toward the molecular sieve adsorption chamber. Since the length of the tank body is about 12 meters, it is relatively long, and the plates are only arranged at both ends of the tank body. Since the larger the electrode spacing, the smaller the electric field 21 intensity under the same voltage. Therefore, if a certain electric field 21 intensity needs to be maintained, the voltage needs to be increased when the electrode spacing is larger. As an improvement, preferably, it is set as follows Fig. 9 The plurality of electrode structures 25 connected in series are shown, and a double electrode 41 is arranged between two adjacent electrode structures 25, that is, one side is a positive electrode plate 23 and the other side is a negative electrode plate 24, and a through hole 42 is arranged in the middle of the double electrode 41 for the free body 26 to pass through. Fig. 9The several substrate structures shown are arranged in sequence and powered from right to left in sequence, so that the free body 26 passing therethrough obtains propulsion power step by step. The free body 26 passes through and enters the next-level plate structure 25, and finally moves to the leftmost plate structure 25 after passing through step by step, and a molecular sieve adsorption chamber 40 is set there, thereby realizing the transportation of the free body 26 from one end of the tank to the other end over a longer distance.

[0038] Embodiment five: As an application of the kinetic energy structure formed by ultrasound in the interlayer space 3, Figure 8 For example, in this case, the electrode plate is not required in the figure, and the kinetic energy structure is a directional ultrasonic transducer 27, which is arranged in the other end of the interlayer space 3 away from the molecular sieve adsorption chamber, and the direction of the sound wave emitted by the directional ultrasonic transducer 27 is toward the molecular sieve adsorption chamber 40. Only the ultrasonic transducer is arranged in the interlayer space 3, and the ultrasonic wave is emitted in a directional manner, and the kinetic energy of the sound wave is used to drive the free body 26 to move toward the molecular sieve adsorption chamber.

[0039] It is understandable that in an absolute vacuum, there is no propagation medium for sound waves, so if the vacuum degree in the interlayer space 3 is good, that is, there is basically no free body 26 inside, then the directional ultrasonic transducer 27 basically does not work and is not needed. Once the vacuum degree in the interlayer space 3 decreases, that is, a rarefied medium is formed in the interlayer space 3, at this time, the sound waves emitted by the ultrasonic transducer can be used as a driving force to push the free body 26 toward the separation screen adsorption chamber side, thereby improving the vacuum degree of the interlayer space 3.

[0040] 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 molecular sieve adsorption chamber device for a low-temperature liquid tank truck, comprising an inner tank body (1) and an outer tank body (2), wherein the inner tank body (1) and the outer tank body (2) are spaced apart to form an interlayer space (3); characterized in that: A molecular sieve adsorption chamber is arranged between the spherical tank walls (4) of the inner tank body (1) and the outer tank body (2) at one end of the tank truck, 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 (1) or the outer tank body (2) as a bottom layer (5) into the interlayer space (3), and the 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, and a surface layer structure (6) for gas or moisture to pass through is formed on the side away from the bottom layer (5); The molecular sieve adsorption chamber further comprises a feed pipeline (7) and a discharge pipeline (8), wherein the feed pipeline (7) is connected to the top end of the molecular sieve adsorption chamber, and the discharge pipeline (8) is connected to the bottom end of the molecular sieve adsorption chamber, and the ends of the feed pipeline (7) and the discharge pipeline (8) are both arranged through the outer tank body (2), and a sealing head (9) is provided at one end of the feed pipeline (7) and the discharge pipeline (8) outside the outer tank body (2).

2. The molecular sieve adsorption chamber device for a cryogenic liquid tank truck according to claim 1, characterized in that: The molecular sieve adsorption chamber further comprises an outer ring sealing plate (10), the outer ring sealing plate (10) is circular, the surface layer structure (6) comprises a panel (11) having the same spherical curvature as the end of the tank body, the outer periphery of the panel (11) being 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), so that the panel (11), the bottom layer (5) and the outer ring sealing plate (10) enclose a molecular sieve adsorption chamber; the surface layer structure (6) further comprises a plurality of through holes (12) provided on the panel (11), and a wire mesh (13) provided on the inner side of the panel (11).

3. The molecular sieve adsorption chamber device for a cryogenic liquid tank truck according to claim 1, characterized in that: The molecular sieve adsorption chamber comprises 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) being arranged in a concentric circle shape, the surface layer structure (6) comprising a panel (11), the panel (11) being annular, the inner circle of which is fixedly connected to the inner ring sealing plate (14), and the outer circle of which 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) enclose a molecular sieve adsorption chamber; the surface layer structure (6) further comprises a plurality of through holes (12) arranged on the panel (11), and a wire mesh (13) arranged in contact with the inner side of the panel (11).

4. A molecular sieve adsorption chamber device for a cryogenic liquid tank truck according to claim 2 or 3, characterized in that: It also comprises a panel (11) closure structure for controlling the opening or closing of the through hole (12) on the surface layer structure (6); it comprises an outer plate (16) arranged on the outside of the panel (11); the outer plate (16) has the same shape as the panel (11) and is provided with an outer through hole (17) corresponding to the position of the through hole (12); the outer plate (16) and the panel (11) are arranged in parallel and a gap space (19) is formed therebetween for accommodating a rotating sealing plate (28); the rotating sealing plate (28) is rotatably connected in the gap space (19); the rotating sealing plate (28) is provided with a vent hole (18) matching 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) and the through hole (12) are in the same position; in the sealed position, the vent hole (18) and the through hole (12) are misaligned.

5. The molecular sieve adsorption chamber device for a cryogenic liquid tank truck according to claim 1, characterized in that: It also includes a kinetic energy structure arranged in the interlayer space (3) and used to move the moisture and gas generated in the interlayer space (3) toward the end of the molecular sieve adsorption chamber.

6. The molecular sieve adsorption chamber device for a cryogenic liquid tank truck according to claim 5, characterized in that: The kinetic energy structure comprises an energizing device (20) for charging the free moisture and gas in the interlayer space (3), and an electric field (21) formed in the interlayer space (3) along the axial direction, so that the charged free bodies (26) move toward 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 a cryogenic liquid tank truck according to claim 6, characterized in that: The energizing device (20) is an electron beam generator (22), and the electron beam generator (22) is arranged at the other end of the interlayer space (3) away from the molecular sieve adsorption chamber. The electric field (21) includes a plate structure (25) arranged in parallel in pairs, and the plate structure (25) includes a positive plate (23) and a negative plate (24). The positive plate (23) is arranged at one end close to the molecular sieve adsorption chamber, and the negative plate (24) is arranged at one end away from the molecular sieve adsorption chamber.

8. The molecular sieve adsorption chamber device for a cryogenic liquid tank truck according to claim 7, characterized in that: The interlayer space (3) is provided with a plurality of groups of plate structures (25) arranged in sequence along the axis direction of the tank body, so that the charged free bodies (26) pass through the plate structures (25) in sequence to form a transfer motion and move toward the molecular sieve adsorption chamber.

9. The use of a molecular sieve adsorption chamber device for a cryogenic liquid tank truck according to any one of claims 6 to 8, characterized in that: An electric field (21) is formed in the interlayer space (3) between the inner tank body (1) and the outer tank body (2), and the direction of the electric field (21) is parallel to the axis direction of the tank body; the free bodies (26) in the interlayer space (3) are charged by an energizing device (20), and the charged free bodies (26) move toward one end of the molecular sieve adsorption chamber device under the action of the electric field (21).

10. The molecular sieve adsorption chamber device for a cryogenic liquid tank truck according to claim 5, characterized in that: The kinetic energy structure is a directional ultrasonic transducer (27), which is arranged at the other end of the interlayer space (3) away from the molecular sieve adsorption chamber, and the direction of the sound waves emitted by the directional ultrasonic transducer (27) is towards the molecular sieve adsorption chamber.

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