Cold energy conversion equipment of multi-energy system

Abstract

The invention relates to the technical field of cold energy power generation equipment, in particular to cold energy conversion equipment of a multi-energy system, which comprises a storage tank for storing liquid LNG and an LNG cold energy power generation system capable of utilizing cold energy of the liquid LNG in the storage tank to generate power, and further comprises a plurality of groups of fixing devices for limiting the storage tank, each set of fixing device comprises a base, a supporting mechanism arranged on the base and used for containing a storage tank, a horizontal limiting mechanism arranged on the supporting mechanism and used for limiting the storage tank in the horizontal direction, and a downward pressing mechanism used for limiting the storage tank in the vertical direction. When the storage tank is placed on the supporting mechanism, under the gravity effect of the storage tank, the horizontal limiting mechanism and the downward pressing mechanism conduct horizontal limiting and vertical limiting on the storage tank correspondingly. According to the scheme, the storage tank can be conveniently mounted and replaced while being limited in all directions.

Description

Technical Field

[0001] The present invention relates to the technical field of cold energy power generation equipment, and in particular to a cold energy conversion equipment of a multi-energy system. Background Art

[0002] A multi-energy system is an integration of multiple renewable energy sources including geothermal energy, solar energy, air energy, hydropower, natural gas cooling energy, city tap water, sewage, industrial wastewater and waste heat. It uses new technologies such as heat recovery, conversion, energy storage, thermal balance, and intelligent control to intelligently balance and control various energy flows, thereby achieving the recycling of energy.

[0003] The conversion and utilization of natural gas cold energy is also an important part of the multi-energy system. Natural gas is a combustible gas naturally mined from gas fields, mainly composed of methane. LNG is condensed into liquid by cooling gaseous natural gas to -162°C under normal pressure. After liquefaction, natural gas can greatly save storage and transportation space, and has the characteristics of high calorific value and high performance. At LNG receiving stations and gasification stations, LNG is generally required to be gasified by a gasifier before use. A lot of cold energy is released during gasification. Usually, this part of cold energy is lost with the seawater and air in the natural gas gasifier, resulting in energy waste. In the existing technology, LNG cold energy power generation equipment has begun to be developed. Commonly used power generation methods include direct expansion method, secondary media method, and combined method. The combined method is generally used on ships. For example, Chinese patent CN210264839U discloses a ship-borne LNG cold energy utilization power generation device, including an LNG storage tank and a combined LNG cold energy power generation system connected to the LNG storage tank, and also includes: a pair of saddle supports, which are coaxially spaced on the ship deck, each saddle support has two roller grooves on its arc surface, each roller groove is arranged along the circumference of the arc surface, and multiple roller groups are evenly spaced in each roller groove, each roller group includes at least two rollers, the apex of the roller along the radial direction of the arc surface is higher than the arc surface, and a limit groove with a convex cross-sectional profile is arranged between the two roller grooves, and the limit groove is also arranged along the circumference of the arc surface, wherein the LNG storage tank is placed on a pair of saddle supports. This solution can slow down the amplitude of the liquid in the LNG storage tank shaking with the hull, reduce the internal friction of the LNG liquid, and thus reduce the generation of BOG flash steam in the LNG storage tank.

[0004] Since the LNG storage tank filled with LNG liquid is heavy, it is usually necessary to use a crane to install and remove the LNG storage tank, but the installation and removal of the LNG storage tank in the prior art is relatively inconvenient. Summary of the invention

[0005] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is: to provide a cold energy conversion device for a multi-energy system to solve the problem of the inconvenience in installing and removing the LNG storage tank in the above-mentioned prior art.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is: a cold energy conversion device of a multi-energy system, comprising a storage tank for storing liquid LNG and an LNG cold energy power generation system, the LNG cold energy power generation system can generate electricity using the cold energy of the liquid LNG in the storage tank, and also comprises a plurality of sets of fixing devices for limiting the storage tanks, each set of the fixing devices comprises a base, a supporting mechanism arranged on the base for placing the storage tank, a horizontal limiting mechanism arranged on the supporting mechanism for limiting the storage tank in the horizontal direction, and a pressing mechanism for limiting the storage tank in the vertical direction, when the storage tank is placed on the supporting mechanism, under the action of the gravity of the storage tank, the horizontal limiting mechanism and the pressing mechanism both limit the storage tank horizontally and vertically, respectively.

[0007] Furthermore, the support mechanism includes a U-shaped support seat arranged parallel to the axial direction of the storage tank, two support plates fixedly connected to the upper end surfaces of the two side walls of the U-shaped support seat, horizontal plates slidably connected to the two side walls of the U-shaped support seat, and an arc-shaped seat arranged on the upper surface of the horizontal plate. The two support plates are vertically symmetrically arranged, and the horizontal plates are horizontally arranged in a direction perpendicular to the axis of the U-shaped support seat. Vertical slide grooves 1 that slidably cooperate with the horizontal plates are arranged on the two side walls of the U-shaped support seat, and the two ends of the horizontal plate extend out through the vertical slide grooves 1 respectively. Outside the U-shaped support seat, the arc seat is located inside the U-shaped support seat and is fixedly connected to the horizontal plate. The upper end surface of the arc seat is set to an arc surface that matches the outer wall of the storage tank. A spring is vertically arranged under the horizontal plate. The upper end of the spring is connected to the horizontal plate, and the lower end of the spring is connected to the inner bottom wall of the U-shaped support seat. The horizontal limiting mechanism and the downward pressing mechanism are both arranged in cooperation with the support plate. When the storage tank forces the horizontal plate to slide downward, the horizontal plate drives the horizontal limiting mechanism and the downward pressing mechanism to act to limit the storage tank.

[0008] Furthermore, a threaded rod is vertically arranged on the bottom surface of the horizontal plate, the upper end of the threaded rod is fixedly connected to the horizontal plate, the lower end of the threaded rod extends downwardly out of the U-shaped support seat, a through hole for allowing the threaded rod to pass freely is arranged on the bottom plate of the U-shaped support seat, and a limiting nut is arranged in cooperation with the threaded upper end of the threaded rod.

[0009] The cam is an angular channel that is fixedly connected to the support frame, and the cam is connected with the support frame to form a circle, and the cam is connected with the support frame to form a circle.

[0010] Furthermore, the first end of the transverse slide plate is provided with a second arc-shaped surface that matches with the outer wall of the storage tank.

[0011] The cam is an uppermost portion of the support frame, and the lowermost portion of the support frame is provided with a first end fixedly connected to the support frame, and the second end of the first end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end of the second end

[0012] Furthermore, the end surface of the pressure plate facing the storage tank is configured as an arc surface three that matches the outer wall of the storage tank.

[0013] Furthermore, a plurality of rollers are rotatably arranged on the arc surface one, the arc surface two and the arc surface three, and the rotation axis of the rollers is arranged parallel to the axis of the storage tank.

[0014] Furthermore, an annular track is coaxially arranged on the outer wall of the storage tank, and an annular raceway cooperating with the roller is recessed on the annular track.

[0015] Furthermore, the base is a support frame with an open upper end.

[0016] The working principle of the present invention is as follows:

[0017] When the storage tank is not placed on the arc seat, the spring forces the horizontal plate to be located at the upper end of the vertical slide groove 1, the vertical push plate moves upward to cause the inclined surface section 1 to move upward, the vertical slider is located at the upper end of the vertical slide groove 2, the tension spring contracts to cause the horizontal slide plate to drive the lower end of the pressure plate to approach the vertical push plate, and at the same time, when the vertical slider is located at the upper end of the vertical slide groove 2, the pressure plate is lifted by the pressure rod to cause the pressure plate to flip away from the placement position of the storage tank. The two pressure plates flip and move away from each other so that the storage tank can directly fall downward between the two pressure plates and onto the arc seat.

[0018] When the lifting makes the annular raceway of the storage tank align with the roller on the arc seat and gradually presses the arc seat down, so that the arc seat drives the horizontal plate to slide downward, the vertical push plate moves downward with the horizontal plate, and then the vertical slider slides downward along the vertical slide groove 2, and the upper end of the pressure rod moves downward to push the pressure plate to flip in the direction close to the storage tank. Under the cooperation of the inclined surface section 1 and the inclined surface 2, the horizontal slide plate slides in the direction close to the storage tank. When the roller at the first end of the horizontal slide plate and the roller on the pressure plate are both stuck in the annular raceway, the nut on the threaded rod is rotated to press the bottom plate of the U-shaped support seat, and the horizontal plate stops sliding down. At this time, the limiting plug rod matching the limiting hole is inserted into the limiting hole close to the upper end face of the vertical slider to prevent the vertical slider from sliding upward. Because the roller is stuck in the concave annular raceway, the storage tank will not move along the axial direction of the storage tank, and the storage tank is limited in all directions with the limitation of the horizontal slide plate and the pressure plate.

[0019] When the storage tank needs to be lifted, the limit rod is removed and the storage tank is slowly lifted upward. Under the elastic force of the spring and the tension of the tension spring, the horizontal slide slides away from the storage tank, the pressure plate flips and moves away from the storage tank, and the storage tank can move upward and leave the arc seat without hindrance.

[0020] Compared with the prior art, the present invention has a simple and compact structure. The gas tank is limited in all directions by means of a downward pressing mechanism, a lateral limiting mechanism, an annular raceway, a rolling wheel and a limiting plug. After the limiting plug is removed, the gas tank can be lifted up or placed straight up or down without obstruction, making it convenient to replace the gas tank. The storage tank in the present invention can rotate relative to its own axis, thereby reducing the swaying degree of the LNG liquid in the storage tank, reducing the internal friction of the LNG liquid, and thereby reducing the generation of BOG flash steam in the storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1A schematic diagram of the main view of a cold energy conversion device of a multi-energy system of the present invention Figure 1 .

[0023] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0024] Figure 3 for Figure 1 Middle AA section view.

[0025] Figure 4 This is a schematic diagram of the top view of the structure of a cold energy conversion device of a multi-energy system of the present invention.

[0026] Figure 5 It is a schematic diagram of the structure of the support plate when viewed from above.

[0027] Figure 6 A schematic diagram of the main view of a cold energy conversion device of a multi-energy system of the present invention Figure 2 .

[0028] Figure 7 for Figure 6 Enlarged view of part B in the middle.

[0029] The meanings of the symbols in the accompanying drawings are:

[0030] Storage tank-10; annular track-101; annular raceway-102;

[0031] Base - 20;

[0032] U-shaped support seat-31; support plate-32; horizontal slide groove-321; vertical slide groove 2-322; limit hole-323; limit plug-in rod-324; horizontal plate-33; arc seat-34; arc surface 1-341; vertical slide groove 1-35; spring-36; threaded rod-37; limit nut-38;

[0033] Vertical push plate-41; inclined surface section 1-411; horizontal slide plate-42; inclined surface 2--421; arc surface 2 422; fixed plate-43; tension spring-44;

[0034] Vertical slider-51; pressing plate-52; arc surface three-521; pressing rod-53; rotating seat one-54;

[0035] Roller 60. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] A cold energy conversion device of a multi-energy system of this embodiment, such as Figure 1-Figure 7 As shown, it includes a storage tank 10 for storing liquid LNG and an LNG cold energy power generation system. The LNG cold energy power generation system can generate electricity using the cold energy of the liquid LNG in the storage tank 10. It also includes a plurality of sets of fixing devices for limiting the storage tank 10. Each set of the fixing devices includes a base 20, a supporting mechanism disposed on the base 20 for placing the storage tank 10, a horizontal limiting mechanism disposed on the supporting mechanism for limiting the storage tank 10 in the horizontal direction, and a pressing mechanism for limiting the storage tank 10 in the vertical direction. When the storage tank 10 is placed on the supporting mechanism, under the action of the gravity of the storage tank 10, the horizontal limiting mechanism and the pressing mechanism limit the storage tank 10 horizontally and vertically, respectively. The storage tank 10 is a horizontally arranged cylindrical tank, combined with Figure 1-Figure 3 As shown, an annular track 101 coaxially arranged on the outer wall of the storage tank 10 cooperates with the fixing device, and an annular raceway 102 is recessed on the annular track 101. In actual construction, the number of fixing devices can be reasonably set according to the length and weight of the storage tank 10. In this embodiment, the fixing devices are set to 2 groups, and the 2 groups of fixing devices are arranged along the length direction of the storage tank 10.

[0039] like Figure 1As shown, the support mechanism includes a U-shaped support seat 31 arranged in parallel with the axial direction of the storage tank 10, two support plates 32 fixedly connected to the upper end surfaces of the two side walls of the U-shaped support seat 31, horizontal plates 33 slidably connected to the two side walls of the U-shaped support seat 31, and an arc seat 34 arranged on the upper surface of the horizontal plate 33. The base 20 is a support frame with an upper end opening. The U-shaped support seat 31 is arranged on the base 20 and is detachably connected to the base 20. The axis of the U-shaped support seat 31 is arranged in parallel with the axis of the storage tank 10. The two support plates 32 are vertically symmetrically arranged, the lower end of one support plate 32 is fixedly connected to the upper end surface of one side wall of the U-shaped support seat 31, and the lower end of the other support plate 32 is fixedly connected to the upper end surface of the other side wall of the U-shaped support seat 31. The horizontal plate 33 is horizontally arranged along a direction perpendicular to the axis of the U-shaped support seat 31. Both side walls of the U-shaped support seat 31 are provided with vertical slide grooves 35 that slide with the horizontal plate 33, and both ends of the horizontal plate 33 extend out of the U-shaped support seat 31 through the vertical slide grooves 35. The arc seat 34 is located in the U-shaped support seat 31 and is fixedly connected to the horizontal plate 33. The upper end surface of the arc seat 34 is set as an arc surface 341 that matches the outer wall of the storage tank 10. A plurality of rollers 60 that match the annular raceway 102 are rotatably arranged on the arc surface 341, and the rotation axis of the roller 60 is arranged parallel to the axis of the storage tank 10. A spring 36 is vertically arranged below the horizontal plate 33, the upper end of the spring 36 is fixedly connected to the horizontal plate 33, the lower end of the spring 36 is fixedly connected to the inner bottom wall of the U-shaped support seat 31, a threaded rod 37 is vertically arranged on the bottom surface of the horizontal plate 33, the upper end of the threaded rod 37 is fixedly connected to the horizontal plate 33, the lower end of the threaded rod 37 extends downward from the U-shaped support seat 31, a through hole for allowing the threaded rod 37 to pass freely is arranged on the bottom plate of the U-shaped support seat 31, and a limit nut 38 is arranged on the upper end of the threaded rod 37. The horizontal limiting mechanism and the pressing mechanism are both arranged in cooperation with the support plate 32, and when the storage tank 10 forces the horizontal plate 33 to slide downward, the horizontal plate 33 drives the horizontal limiting mechanism and the pressing mechanism to act to limit the storage tank 10.

[0040] Combination Figure 1 , Figure 2As shown, the horizontal limiting mechanism includes a vertical push plate 41 arranged in pair with the support plate 32, a horizontal slide plate 42 arranged horizontally in a direction perpendicular to the axis of the storage tank 10, and a fixed plate 43 fixedly connected to the horizontal slide plate 42. The vertical push plate 41 is vertically arranged on the side of the support plate 32 away from the storage tank 10, the lower end of the vertical push plate 41 is fixedly connected to one end of the horizontal plate 33, the upper end of the vertical push plate 41 is a free end, and the lower end side wall of the vertical push plate 41 close to the support plate 32 is arranged to be an inclined surface section 411 inclined downward in the direction away from the support plate 32, the first end of the horizontal slide plate 42 is located on the side of the support plate 32 close to the storage tank 10, and the first end of the horizontal slide plate 42 is provided with a groove which cooperates with the outer wall of the storage tank 10 The second arc surface 422 has a plurality of rollers 60 rotatably arranged on the second arc surface 422 and matched with the annular raceway 102, the rotation axis of the roller 60 is arranged parallel to the axis of the storage tank 10, the second end of the transverse slide plate 42 is located on the side of the support plate 32 away from the storage tank 10, the second end of the transverse slide plate 42 is provided with a second inclined surface 421 matched with the inclined surface section, the support plate 32 is provided with a transverse slide groove 321 slidably matched with the transverse slide plate 42, the fixed plate 43 is arranged near the second end of the transverse slide plate 42, a tension spring 44 is arranged between the fixed plate 43 and the support plate 32 along a direction parallel to the transverse slide plate 42, one end of the tension spring 44 is fixedly connected to the support plate 32, and the other end of the tension spring 44 is fixedly connected to the support plate 32.

[0041] Combination Figure 1 , Figure 2 , Figure 5As shown, the pressing mechanism includes a vertical slider 51 slidably connected to the support plate 32, a pressure plate 52 arranged above the fixed plate 43 and a pressure rod 53 connected to the pressure plate 52, the vertical slider 51 is a cross-shaped plate, and a cross-shaped vertical slide groove 322 cooperating with the vertical slider 51 is vertically arranged inside the upper end of the support plate 32, the first end of the vertical slider 51 horizontally extends out of the vertical slide groove 322 and is fixedly connected to the upper end of the vertical push plate 41, the second end of the vertical slider 51 horizontally extends out of the vertical slide groove 322 in a direction close to the storage tank 10, and the second end of the vertical slider 51 is fixedly connected to the rotating The upper end of the pressure rod 53 is rotatably connected to the rotating seat 154, the lower end of the pressure rod 53 is rotatably connected to a corner point of the pressure plate 52, and the other corner point of the pressure plate 52 is rotatably connected to the upper end of the fixed plate 43. The rotation axis of the pressure rod 53 and the rotating seat 154, the rotation axis of the pressure rod 53 and the pressure plate 52, and the rotation axis of the pressure plate 52 and the fixed plate 43 are all arranged parallel to the axis of the storage tank 10. The upper end of the support plate 32 is provided with a plurality of limiting holes 323 penetrating the support plate 32 in a direction parallel to the axis of the storage tank 10, and the plurality of limiting holes 323 are arranged vertically in sequence. The end surface of the pressure plate 52 facing the storage tank 10 is provided with an arc surface 3 521 matched with the outer wall of the storage tank 10, and a plurality of rollers 60 matched with the annular raceway 102 are rotatably provided on the arc surface 3 521, and the rotation axis of the roller 60 is arranged parallel to the axis of the storage tank 10.

[0042] The working principle of the present invention is as follows:

[0043] like Figure 6 , Figure 7 As shown, when the storage tank 10 is not placed on the arc seat 34, the spring 36 forces the horizontal plate 33 to be located at the upper end of the vertical slide groove 1 35, the vertical push plate 41 moves upward to cause the inclined surface section 1 411 to move upward, and the vertical slider 51 is located at the upper end of the vertical slide groove 2 322. The tension spring 44 contracts to cause the transverse slide plate 42 to drive the lower end of the pressure plate 52 to approach the vertical push plate 41. At the same time, when the vertical slider 51 is located at the upper end of the vertical slide groove 2 322, the pressure plate 52 is pulled by the pressure rod 53 so that the pressure plate 52 flips away from the placement position of the storage tank 10. The two pressure plates 52 flip and move away from each other so that the storage tank 10 can directly fall downward between the two pressure plates 52 and onto the arc seat 34.

[0044] like Figure 1When the hoisting makes the annular raceway 102 of the storage tank 10 align with the roller 60 on the arc seat 34 and gradually presses down the arc seat 34 so that the arc seat 34 drives the horizontal plate 33 to slide downward, the vertical push plate 41 moves downward with the horizontal plate 33, and then the vertical slide block 51 slides downward along the vertical slide groove 322, and the upper end of the pressure rod 53 moves downward to push the pressure plate 52 to flip toward the storage tank 10. Under the cooperation of the inclined surface section 1 411 and the inclined surface 2 421, the horizontal slide plate 42 slides toward the storage tank 10. When the roller 60 and the pressure plate at the first end of the horizontal slide plate 42 are aligned, the horizontal slide plate 41 moves downward with the horizontal plate 33, and then the vertical slide block 51 slides downward along the vertical slide groove 322. When the rollers 60 on 52 are all stuck in the annular raceway 102, the nuts on the threaded rod 37 are rotated so that the nuts are pressed against the bottom plate of the U-shaped support seat 31, and the horizontal plate 33 stops sliding down. At this time, the limiting rod 324 that cooperates with the limiting hole 323 is inserted into the limiting hole 323 close to the upper end surface of the vertical slider 51 to prevent the vertical slider 51 from sliding upward. Since the rollers 60 are stuck in the recessed annular raceway 102, the storage tank 10 will not move along the axial direction of the storage tank 10, and the storage tank 10 is limited in all directions by the limiting of the transverse slide plate 42 and the pressure plate 52.

[0045] When it is necessary to lift the storage tank 10, remove the limiting rod 324, slowly lift the storage tank 10 upwards, and under the elastic force of the spring 36 and the tension of the tension spring 44, the transverse slide plate 42 slides away from the storage tank 10, and the pressure plate 52 flips and moves away from the storage tank 10, so that the storage tank 10 can move upwards and leave the arc seat 34 without hindrance.

[0046] The above are only embodiments of the present invention, and the common knowledge such as the known specific structures and characteristics in the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A cold energy conversion device for a multi-energy system, comprising a storage tank for storing liquid LNG and an LNG cold energy power generation system, wherein the LNG cold energy power generation system can generate electricity using the cold energy of the liquid LNG in the storage tank, and is characterized in that: It also includes multiple groups of fixing devices for limiting the storage tank, each group of the fixing devices includes a base, a supporting mechanism arranged on the base for placing the storage tank, a horizontal limiting mechanism arranged on the supporting mechanism for limiting the storage tank in the horizontal direction, and a pressing mechanism for limiting the storage tank in the vertical direction. When the storage tank is placed on the supporting mechanism, under the action of the gravity of the storage tank, the horizontal limiting mechanism and the pressing mechanism limit the storage tank horizontally and vertically respectively.

2. The cold energy conversion device of a multi-energy system according to claim 1, characterized in that: The support mechanism comprises a U-shaped support seat arranged parallel to the axial direction of the storage tank, two support plates fixedly connected to the upper end faces of the two side walls of the U-shaped support seat, a horizontal plate slidably connected to the two side walls of the U-shaped support seat, and an arc seat arranged on the upper surface of the horizontal plate. The two support plates are vertically symmetrically arranged, and the horizontal plates are horizontally arranged in a direction perpendicular to the axis of the U-shaped support seat. Vertical sliding grooves 1 that slide with the horizontal plates are arranged on the two side walls of the U-shaped support seat, and the two ends of the horizontal plate extend out of the vertical sliding grooves 1 respectively. Outside the U-shaped support seat, the arc seat is located inside the U-shaped support seat and is fixedly connected to the horizontal plate. The upper end surface of the arc seat is set to an arc surface that matches the outer wall of the storage tank. A spring is vertically arranged under the horizontal plate. The upper end of the spring is connected to the horizontal plate, and the lower end of the spring is connected to the inner bottom wall of the U-shaped support seat. The horizontal limiting mechanism and the downward pressing mechanism are both arranged in cooperation with the support plate. When the storage tank forces the horizontal plate to slide downward, the horizontal plate drives the horizontal limiting mechanism and the downward pressing mechanism to act to limit the storage tank.

3. The cold energy conversion device of a multi-energy system according to claim 2, characterized in that: A threaded rod is vertically arranged on the bottom surface of the horizontal plate, the upper end of the threaded rod is fixedly connected to the horizontal plate, the lower end of the threaded rod extends downwardly out of the U-shaped support seat, a through hole for the threaded rod to pass freely is arranged on the bottom plate of the U-shaped support seat, and a limiting nut is arranged in cooperation with the threaded end of the threaded rod.

4. The cold energy conversion device of a multi-energy system according to claim 2, characterized in that: The cam is an angular channel that is fixedly connected to the support frame, and the cam is a channel that is fixedly connected to the support frame by a toothed connection.

5. The cold energy conversion device of a multi-energy system according to claim 4, characterized in that: The first end of the transverse slide plate is provided with a second arc-shaped surface matched with the outer wall of the storage tank.

6. The cold energy conversion device of a multi-energy system according to claim 5, characterized in that: The cam is an uppermost portion of the support frame, and the lowermost portion is provided with a first end fixedly mounted on the support frame, and the second end of the first end is fixedly mounted on the support frame, and the second end of the first end is connected to the support frame by a toothed structure.

7. The cold energy conversion device of a multi-energy system according to claim 6, characterized in that: The end surface of the pressure plate facing the storage tank is configured as an arc surface three that matches the outer wall of the storage tank.

8. The cold energy conversion device of a multi-energy system according to claim 7, characterized in that: A plurality of rollers are rotatably arranged on the arc surface one, the arc surface two and the arc surface three, and the rotation axes of the rollers are arranged parallel to the axis of the storage tank.

9. The cold energy conversion device of a multi-energy system according to claim 8, characterized in that: An annular track is coaxially arranged on the outer wall of the storage tank, and an annular raceway matched with the roller is recessed on the annular track.

10. The cold energy conversion device of a multi-energy system according to claim 1, characterized in that: The base is a supporting frame with an open upper end.

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