High-temperature connecting device and heat pipe system

Abstract

A high-temperature connecting device belongs to the technical field of solar high-temperature equipment and comprises an upper tube box, a lower tube box and a tube clamp, the upper tube box comprises an upper tube plate, the lower tube box comprises a lower tube plate, a connecting short tube used for being matched with a base tube in an inserted mode is arranged on the upper tube plate, and the connecting short tube is in clearance fit with the base tube; a conical funnel connector used for being matched with the base tube in an inserted mode is arranged on the lower tube plate, and the conical funnel connector is in clearance fit with the base tube. Based on the high-temperature connecting device, the utility model further provides a heat pipe system. The base tube is in clearance fit with the short connecting tube or the conical funnel connector, the problem that the base tube is extruded due to deformation of the tube plate connecting hole can be well solved through the structure, meanwhile, sufficient space can be provided for installation of the base tube through the structure, and therefore in the later-period tube panel maintaining and overhauling process, the tube panel is not prone to being damaged. And the base tube can be mounted or dismounted very conveniently.

Description

High-temperature connection devices and heat pipe systems Technical Field

[0001] This utility model relates to the field of solar high-temperature equipment technology, and more specifically, to a high-temperature connection device and a heat pipe system. Background Technology

[0002] In engineering design, various connection methods can be used between different components or parts. Common connection methods include welding, bolting, and riveting. In some specific environments, if space is limited and the operating environment is harsh, ordinary connection methods will not meet the requirements, and special connection methods need to be considered.

[0003] High-temperature solid-state heat absorbers (or high-temperature solid particle heat absorbers) are mainly used to absorb solar energy collected by heliostats (a type of reflector that focuses sunlight). A high-temperature solid-state heat absorber consists of an upper tube box, a lower tube box, and a tube screen. The equipment contains a continuous flow of high-temperature solid particles (or high-temperature particles). The upper and lower tube boxes are made of high-temperature resistant metal materials, while the tube screen is made of high-transmittance quartz glass tubes. During operation, the upper and lower tube boxes and the tube screen expand and deform due to heat. Because the coefficients of thermal expansion of the metal and quartz glass materials differ significantly, the deformation of the tube box and the tube screen varies considerably, causing deformation at their joints. Therefore, ensuring the reliability of the connection between the tube box and the tube screen becomes a key issue that needs to be addressed.

[0004] In conventional designs, the quartz tube directly mates with the tube sheet bore in the tube box, and then a spiral wound gasket is used to seal the end (the connection between the quartz tube and the tube sheet). However, during actual installation and testing, this sealing method presents the following problems:

[0005] First, due to limitations in the manufacturing process, it is difficult to guarantee the roundness of the outer diameter of quartz tubes. Therefore, it is necessary to modify the shape of the holes in the tube sheet on the tube box to make it compatible with the quartz tube before connection. After connection, sealing tape is wrapped around it. However, this connection method still has the problem of particle leakage at the interface. In addition, when replacing quartz tubes later, it is difficult to match the existing tube sheet hole diameter with the replaced quartz tube.

[0006] Secondly, since the operating environment of high-temperature solid heat absorbers is generally between 500℃ and 800℃, the stainless steel tube box will undergo a large degree of deformation and expansion at high temperatures, while the quartz tube will deform less. During the heating or cooling process of the tube box, the tube sheet may deform and squeeze the quartz tube, causing the quartz tube to break. Summary of the Invention

[0007] (I) Technical Issues

[0008] In summary, how to provide a high-temperature connection device and heat pipe system to address the shortcomings of existing technologies and solve or mitigate one or more of the aforementioned problems has become an urgent issue for those skilled in the art.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] This utility model provides a high-temperature connection device for fixing and installing each base tube in a tube panel. The high-temperature connection device includes an upper tube box and a lower tube box. The upper tube box includes an upper tube plate, and the lower tube box includes a lower tube plate.

[0012] Based on the above structure, the present invention also includes a pipe clamp for fixing and installing the base pipe;

[0013] A connecting short tube is provided on the upper tube sheet for inserting with the base tube, and the connecting short tube is clearance-fitted with the base tube;

[0014] A conical funnel joint for fitting with the base tube is provided on the lower tube sheet, and the conical funnel joint is clearance-fitted with the base tube.

[0015] Preferably, in the high-temperature connection device provided by this utility model, the outer diameter of the connecting short tube is smaller than the inner diameter of the base tube, and the connecting short tube is inserted into the base tube; the inner diameter of the upper port of the conical funnel joint is larger than the outer diameter of the base tube, and the base tube is inserted into the upper port of the conical funnel joint.

[0016] Preferably, in the high-temperature connection device provided by this utility model, the lower tube plate is provided with a lower tube plate connection hole, and the lower tube plate connection hole is a tapered opening.

[0017] Preferably, in the high-temperature connection device provided by this utility model, a plurality of connecting short pipes are provided on the upper tube plate, and all the connecting short pipes are equally spaced along the length direction of the upper tube plate; a plurality of conical funnel joints are provided on the lower tube plate, and the conical funnel joints are arranged in one-to-one correspondence with the connecting short pipes.

[0018] Preferably, in the high-temperature connection device provided by this utility model, the upper tube box is made of 316 stainless steel; the lower tube box is made of 310S stainless steel.

[0019] Preferably, in the high-temperature connection device provided by this utility model, multiple pipe clamps are provided, with at least two pipe clamps corresponding to the same base pipe, and at least one pipe clamp is provided at the pipe end position of the base pipe for fixing the end of the base pipe.

[0020] This invention also provides a heat pipe system, including a tube screen, wherein the tube screen includes multiple base tubes, all of which are spaced apart and arranged in parallel. Specifically, in this invention, high-temperature solid heat absorber particles flow inside the base tubes, and this invention also includes the high-temperature connecting device described above, through which all the base tubes are fixedly installed.

[0021] Preferably, in the heat pipe system provided by this utility model, the upper end of the base pipe is fitted onto the outside of the connecting short pipe, and the height between the upper edge of the base pipe and the lower edge of the connecting short pipe is h1, h1 = [(d2-D1)tanα] / 2, where d2 is the inner diameter of the upper end of the base pipe, D1 is the outer diameter of the connecting short pipe, and α is the angle of accumulation of the high-temperature particles.

[0022] Preferably, in the heat pipe system provided by this utility model, the lower end of the base tube is inserted into the upper port of the conical funnel joint, and the height between the upper edge of the upper port of the conical funnel joint and the lower edge of the base tube is h2, h2=[(d3-D2)tanα] / 2, where d3 is the outer diameter of the lower end of the base tube and D2 is the inner diameter of the upper port of the conical funnel joint.

[0023] Preferably, in the heat pipe system provided by this utility model, the base tube is a transparent quartz glass tube.

[0024] (III) Beneficial Effects

[0025] Through the above structural design, the high-temperature connection device provided by this utility model, when applied to a heat pipe system, can achieve the following beneficial technical effects compared with the prior art:

[0026] 1. The upper tube box is equipped with a connecting short pipe. The connecting short pipe and the base pipe are in clearance fit. The connecting short pipe does not contact the base pipe. When the structure is deformed due to temperature changes, this structure can effectively solve the problem of deformation of the tube sheet connection hole squeezing the base pipe.

[0027] 2. The base pipe and the connecting short pipe or conical funnel joint are all fitted with clearance, which provides sufficient space for the installation of the base pipe. Therefore, the installation or disassembly of the base pipe will be very convenient during the later maintenance and repair of the pipe screen.

[0028] 3. The connecting short pipe extends into the base pipe, and the base pipe extends into the conical funnel joint. This connection method uses the high-temperature solid particle repose angle for sealing, which can prevent particles from overflowing and also solve the problem of particle leakage. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0030] Figure 1 is a schematic diagram of the heat pipe system in one embodiment of the present invention;

[0031] Figure 2 is a partial structural schematic diagram of the high-temperature connection device after the base pipe is installed in one embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of the cross-sectional structure along AA in Figure 2;

[0033] Figure 4 is a schematic diagram of the cross-sectional structure along BB in Figure 2;

[0034] Figure 5 is a schematic diagram illustrating the principle of preventing leakage of high-temperature solid particles when the high-temperature connecting device and the base pipe are fitted together.

[0035] In Figures 1 to 5, the correspondence between the reference numerals and the component names is as follows:

[0036] 1. Upper pipe box; 2. Pipe panel; 3. Lower pipe box;

[0037] 1-1. Upper tube sheet; 1-2. Connecting short pipe; 1-3. Other structures of the upper tube box; 2-1. Base pipe; 2-2. Pipe clamp; 3-1. Conical funnel joint; 3-2. Lower tube sheet; 3-3. Other structures of the lower tube box. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0039] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0040] Please refer to Figures 1 to 5. This utility model provides a high-temperature connection device for use in a heat pipe system to achieve the fixed installation of each base pipe 2-1 in the heat pipe panel 2 (the heat pipe panel 2 is provided with multiple base pipes 2-1, and all base pipes 2-1 are arranged in a spaced and parallel manner).

[0041] The high-temperature connection device includes an upper pipe box 1 and a lower pipe box 3. The upper pipe box 1 is used to connect to the upper end of the base pipe 2-1, and the lower pipe box 3 is used to connect to the lower end of the base pipe 2-1. The upper pipe box 1 includes an upper pipe plate 1-1 and other structures 1-3 of the upper pipe box (the other structures 1-3 of the upper pipe box are actually equivalent to the main structure of the upper pipe box 1, and the upper pipe plate 1-1 is installed inside the other structures 1-3 of the upper pipe box). The lower pipe box 3 includes a lower pipe plate 3-2 and other structures 3-3 of the lower pipe box (the other structures 3-3 of the lower pipe box are actually equivalent to the main structure of the lower pipe box 3, and the lower pipe plate 3-2 is installed inside the other structures 3-3 of the lower pipe box).

[0042] This invention employs a clearance fit for the connection at the end of the base pipe 2-1. To secure the base pipe 2-1, this invention also provides a pipe clamp 2-2 for fixing the base pipe 2-1. The pipe clamp 2-2 is fixedly installed relative to the upper pipe box 1 and the lower pipe box 3 (the upper pipe box 1 and the lower pipe box 3 are relatively fixed). The base pipe 2-1 is fixedly installed through the pipe clamp 2-2. Therefore, the base pipe 2-1 can maintain a fixed posture (i.e., maintain a fixed connection state) relative to the upper pipe box 1 and the lower pipe box 3 through the pipe clamp 2-2. A connecting short pipe 1-2 for inserting and engaging with the base pipe 2-1 is provided on the bottom surface of the upper pipe plate 1-1. The connecting short pipe 1-2 and the base pipe 2-1 are clearance-fitted. A conical funnel joint 3-1 for inserting and engaging with the base pipe 2-1 is provided on the upper side of the lower pipe plate 3-2. The conical funnel joint 3-1 and the base pipe 2-1 are clearance-fitted. In this utility model, the conical funnel connector 3-1 is a conical structure with a small opening at the bottom and a large opening at the top. A straight circular tube-shaped pipe end structure (i.e., the aforementioned upper port) is provided at the large opening. The outer diameter of the lower end of the base tube 2-1 is smaller than the inner diameter of the pipe end structure. Therefore, the lower end of the base tube 2-1 can be inserted into the pipe end structure and form a clearance fit with the pipe end structure.

[0043] Specifically, the connecting short tube 1-2 adopts a long straight circular tube structure, and the base tube 2-1 adopts a long straight circular tube structure. The outer diameter of the connecting short tube 1-2 is smaller than the inner diameter of the base tube 2-1. The connecting short tube 1-2 is inserted into the base tube 2-1, and the connecting short tube 1-2 and the base tube 2-1 are coaxially arranged. Therefore, the outer surface of the connecting short tube 1-2 and the inner surface of the base tube 2-1 maintain an equal distance. The inner diameter of the upper port of the conical funnel joint 3-1 (i.e., the tube end structure mentioned above) is larger than the outer diameter of the base tube 2-1. The base tube 2-1 is inserted into the upper port of the conical funnel joint 3-1, and the conical funnel joint 3-1 and the base tube 2-1 are coaxially arranged. Therefore, the inner surface of the upper port of the conical funnel joint 3-1 and the outer surface of the base tube 2-1 maintain an equal distance.

[0044] The conical funnel connector 3-1 is installed on the lower tube sheet 3-2. The specific structure is as follows: the outer conical surface of the conical funnel connector 3-1 is installed at the opening of the lower tube sheet 3-2, that is: the lower tube sheet 3-2 is provided with a lower tube sheet connection hole, and the lower tube sheet connection hole is a conical opening. This can improve the firmness and stability of the conical funnel connector 3-1 installed on the lower tube sheet 3-2.

[0045] Specifically, the upper tube sheet 1-1 is provided with multiple connecting short pipes 1-2 (the number of connecting short pipes 1-2 is the same as the number of base pipes 2-1 in the tube panel 2). The upper tube sheet 1-1 is a rectangular plate structure, and all the connecting short pipes 1-2 are equally spaced along the length of the upper tube sheet 1-1; the lower tube sheet 3-2 is provided with multiple conical funnel joints 3-1, and the conical funnel joints 3-1 are provided in a one-to-one correspondence with the connecting short pipes 1-2.

[0046] Specifically, the upper pipe box 1 is made of 316 stainless steel, and the lower pipe box 3 is made of 310S stainless steel. Of course, depending on customer requirements or the requirements of the operating environment, the upper pipe box 1 and the lower pipe box 3 can also be made of other metal materials. Furthermore, the various structural components of the upper pipe box 1 and the upper pipe plate 1-1, or the various structural components of the lower pipe box 3 and the lower pipe plate 3-2, can be made of the same metal material or different metal materials.

[0047] The pipe clamp 2-2 is used to clamp and fix the base pipe 2-1. In the prior art, any structure that can fix a round pipe can be used as the pipe clamp 2-2 in this utility model.

[0048] Specifically, there are multiple pipe clamps 2-2 (at least twice the number of base pipes 2-1 in the pipe screen 2), with at least two pipe clamps 2-2 corresponding to the same base pipe 2-1, and at least one pipe clamp 2-2 corresponding to the pipe end position of the base pipe 2-1 for fixing the end of the base pipe 2-1.

[0049] Based on the above-mentioned high-temperature connection device, this utility model also provides a heat pipe system, which includes a tube screen 2 and a main structure of the heat pipe system. The main structure of the heat pipe system is equivalent to an installation frame. The upper tube box 1, lower tube box 2 and tube clamp 2-2 in the above-mentioned high-temperature connection device are all fixedly installed on the main structure of the heat pipe system, thereby realizing the relative fixation between the upper tube box 1, lower tube box 2 and tube clamp 2-2. When the tube clamp 2-2 fixes the base tube 2-1, the base tube 2-1 can remain relatively fixed relative to the upper tube box 1 and lower tube box 2.

[0050] The tube screen 2 includes multiple base tubes 2-1. All the base tubes 2-1 are spaced apart and arranged in parallel. In use, high-temperature particles flow inside the base tubes 2-1. Once the manufacturing material and particle size range of the high-temperature particles are determined, the angle of repose of the high-temperature particles can also be determined.

[0051] The heat pipe system provided by this utility model adopts the high-temperature connection device as described above. The heat pipe system uses the high-temperature connection device to fix and install all the base pipes 2-1.

[0052] Specifically, the high-temperature connection device includes a connecting short pipe 1-2 and a conical funnel joint 3-1; the upper end of the base pipe 2-1 is fitted onto the outside of the connecting short pipe 1-2, and the height between the upper edge of the base pipe 2-1 (the edge of the upper port of the base pipe 2-1) and the lower edge of the connecting short pipe 1-2 (the edge of the lower port of the connecting short pipe 1-2) is h1, h1=[(d2-D1)tanα] / 2, where d2 is the inner diameter of the upper end of the base pipe 2-1, D1 is the outer diameter of the connecting short pipe 1-2, and α is the angle of repose of the high-temperature particles.

[0053] Specifically, the lower end of the base tube 2-1 is inserted into the upper end of the conical funnel connector 3-1. The height between the upper edge of the conical funnel connector 3-1 and the lower edge of the base tube 2-1 (which can be understood as the insertion depth of the lower end of the base tube 2-1 into the upper port of the conical funnel connector 3-1) is h2, h2=[(d3-D2)tanα] / 2, where d3 is the outer diameter of the lower end of the base tube 2-1 and D2 is the inner diameter of the upper port of the conical funnel connector 3-1.

[0054] Specifically, the base tube 2-1 is a transparent quartz glass tube.

[0055] As described above, this utility model provides a high-temperature connection device. In one specific embodiment of this utility model, the high-temperature connection device includes an upper tube box 1 and a lower tube box 3. The upper tube box 1 is composed of an upper tube plate 1-1, a connecting short pipe 1-2, and other structures 1-3 of the upper tube box. The lower tube box 3 is composed of a lower tube plate 3-2, a conical funnel joint 3-1, and other structures 3-3 of the lower tube box. The upper tube plate 1-1 is provided with a plurality of upper tube plate connection holes, which correspond one-to-one with and are fixedly connected to the connecting short pipe 1-2 (the connection between the upper tube plate connection hole and the connecting short pipe 1-2 is a sealed connection structure). The lower tube plate 3-2 is provided with a plurality of lower tube plate connection holes, which correspond one-to-one with and are fixedly connected to the conical funnel joint 3-1 (the connection between the lower tube plate connection hole and the conical funnel joint 3-1 is a sealed connection structure).

[0056] This utility model also provides a high-temperature heat pipe system, including the aforementioned high-temperature connecting device and a tube screen 2. The tube screen 2 is composed of several base tubes 2-1 and several tube clamps 2-2 (the tube clamps 2-2 are one of the components of the high-temperature connecting device). The upper part of the base tube 2-1 is connected to the lower part of the connecting short tube 1-2 (the upper part of the base tube 2-1 is sleeved on the outside of the connecting short tube 1-2), and the lower part of the base tube 2-1 is connected to the upper part of the conical funnel joint 3-1 (the lower part of the base tube 2-1 is inserted into the upper port of the conical funnel joint 3-1).

[0057] The base tube 2-1 is made of quartz tube and is a long, straight, round tube. In one specific embodiment of this utility model, the outer diameter of the base tube 2-1 is 100mm and the inner diameter is 90mm. The upper tube box 1 is made entirely of 316 stainless steel, and the outer diameter of the connecting short tube 1-2 is 80mm (10mm different from the inner diameter of the upper end of the base tube 2-1). The lower tube box 3 is made entirely of 310s stainless steel, and the inner diameter of the upper end of the conical funnel connector 3-1 is 110mm (10mm different from the inner diameter of the lower end of the base tube 2-1). Due to the different manufacturing materials, the interfaces of the base tube 2-1 and the upper and lower tube boxes 3 have different coefficients of thermal expansion.

[0058] In use, after fixing the upper tube box 1 and the lower tube box 3, the base tube 2-1 is slightly tilted and its upper end is inserted into the tube plate hole connecting short tube 1-2 of the upper tube box 1 (the insertion depth is greater than the normal assembly length, so as to provide assembly margin for the lower end of the base tube 2-1); then the base tube 2-1 is slowly straightened and, after being aligned with the conical funnel joint 3-1 below, it is slowly lowered (adjusting the assembly dimensions between the base tube 2-1, the tube plate hole connecting short tube 1-2, and the conical funnel joint 3-1); then the tube clamp 2-2 is initially tightened. The tube clamp 2-2 is fixed relative to the upper and lower tube boxes 3. Therefore, after fixing the tube clamp 2-2, the base tube 2-1 can be prevented from sliding relative to the upper and lower tube boxes 3. Repeat the above operation to install each base pipe 2-1. After all base pipes 2-1 are installed, fine-tune the pipe clamp 2-2 so that the upper part of all base pipes 2-1 fits into the connecting short pipe 1-2. The assembly dimension between the base pipe 2-1 and the connecting short pipe 1-2 is 20mm, which is greater than [tan60°(90-80)] / 2. The assembly dimension of the lower part of the base pipe 2-1 extending into the conical funnel joint 3-1 is 20mm, which is greater than [tan60°(110-100)] / 2. The above assembly dimension refers to the dimension of the overlapping part of the base pipe 2-1 fitted into the connecting short pipe 1-2 (conical funnel joint 3-1). The angle of repose of the high-temperature particles is 60°.

[0059] Because the base pipe 2-1 and the connecting short pipe 1-2 have a non-contact fit, there is a 5mm gap between the inner wall of the base pipe 2-1 and the outer wall of the connecting short pipe 1-2. Due to the large assembly gap (5mm gap), there will be no deformation, squeezing, or breakage at the connection. In addition, since solid particles have a fixed angle of repose and do not have the fluidity of liquids, a "self-locking" effect can be formed at the gap to prevent particles from leaking out of the pipe.

[0060] When replacing the base tube 2-1 during later maintenance, simply loosen the tube clamp 2-2, tilt the base tube 2-1 appropriately, and it can be pulled out. Through the above structural improvements, this utility model effectively solves the safety problem of the base tube 2-1 being deformed and squeezed under high temperature conditions, as well as the problem of particle leakage and the problem of disassembly for later maintenance.

[0061] Through the above structural design, the high-temperature connection device provided by this utility model, when applied to a heat pipe system, can achieve the following beneficial technical effects compared with the prior art:

[0062] 1. The upper tube box 1 is equipped with a connecting short pipe 1-2. The connecting short pipe 1-2 and the base pipe 2-1 have a non-contact fit structure, that is, the connection between the connecting short pipe 1-2 and the base pipe 2-1 is a clearance fit. This structure can effectively solve the problem of deformation of the tube sheet connection hole squeezing the base pipe 2-1.

[0063] 2. The base pipe 2-1 and the connecting short pipe 1-2 or the conical funnel joint 3-1 are both fitted with a clearance fit. During the later maintenance and repair of the pipe panel 2, due to the clearance fit, the fit space between the connecting short pipe 1-2 or the conical funnel joint 3-1 and the base pipe 2-1 is large, which makes the installation or disassembly of the base pipe 2-1 very convenient.

[0064] 3. The connecting short pipe 1-2 extends into the base pipe 2-1, and the base pipe 2-1 extends into the conical funnel joint 3-1. This connection method uses the high-temperature solid particle repose angle for sealing, which can prevent particles from overflowing and also solve the problem of particle leakage.

[0065] 4. This utility model has a reasonable structural design, is convenient and practical to use, and is easy to promote;

[0066] 5. In this utility model, the pipe opening connection between the base pipe 2-1 and the connecting short pipe 1-2 or the conical funnel joint 3-1 adopts the form of gap connection. This is convenient for operation, avoids the squeezing and cracking caused by the different expansion coefficients of the pipe box 3 and the base pipe 2-1 under high temperature conditions, and is also convenient for later maintenance and disassembly.

[0067] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-temperature connection device for fixing and installing various base tubes in a tube panel, the high-temperature connection device comprising an upper tube box and a lower tube box, the upper tube box comprising an upper tube plate, and the lower tube box comprising a lower tube plate, characterized in that, It also includes a pipe clamp for fixing the base pipe; a connecting short pipe for inserting and engaging with the base pipe is provided on the upper pipe plate, the connecting short pipe being in clearance fit with the base pipe; and a conical funnel joint for inserting and engaging with the base pipe is provided on the lower pipe plate, the conical funnel joint being in clearance fit with the base pipe.

2. The high-temperature connection device according to claim 1, characterized in that, The outer diameter of the connecting short tube is smaller than the inner diameter of the base tube, and the connecting short tube is inserted into the base tube; the inner diameter of the upper port of the conical funnel joint is larger than the outer diameter of the base tube, and the base tube is inserted into the upper port of the conical funnel joint.

3. The high-temperature connection device according to claim 1, characterized in that, The lower tube sheet is provided with a lower tube sheet connection hole, which is a tapered opening.

4. The high-temperature connection device according to claim 1, characterized in that, The upper tube sheet is provided with a plurality of connecting short tubes, and all the connecting short tubes are equally spaced along the length of the upper tube sheet; the lower tube sheet is provided with a plurality of conical funnel joints, and the conical funnel joints are provided in one-to-one correspondence with the connecting short tubes.

5. The high-temperature connection device according to claim 1, characterized in that, The upper pipe box is made of 316 stainless steel; the lower pipe box is made of 310S stainless steel.

6. The high-temperature connection device according to claim 1, characterized in that, Multiple pipe clamps are provided, with at least two pipe clamps corresponding to the same base pipe, and at least one pipe clamp is provided at the pipe end position of the base pipe for fixing the end of the base pipe.

7. A heat pipe system comprising a tube screen, the tube screen comprising a plurality of base tubes, all of the base tubes being spaced apart and all of the base tubes being arranged in parallel, characterized in that, The base tube contains high-temperature solid heat absorber particles; it also includes a high-temperature connecting device as described in any one of claims 1 to 6, through which all of the base tubes are fixedly installed.

8. The heat pipe system according to claim 7, characterized in that, The upper end of the base tube is fitted onto the outside of the connecting short tube. The height between the upper edge of the base tube and the lower edge of the connecting short tube is h1, where h1 = [(d2-D1)tanα] / 2, d2 is the inner diameter of the upper end of the base tube, D1 is the outer diameter of the connecting short tube, and α is the angle of repose of the high-temperature particles.

9. The heat pipe system according to claim 8, characterized in that, The lower end of the base tube is inserted into the upper port of the conical funnel connector. The height between the upper edge of the upper port of the conical funnel connector and the lower edge of the base tube is h2, where h2 = [(d3-D2)tanα] / 2, d3 is the outer diameter of the lower end of the base tube, and D2 is the inner diameter of the upper port of the conical funnel connector.

10. The heat pipe system according to claim 7, characterized in that, The base tube is a transparent quartz glass tube.

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