Linear solar heat collection pipeline

Abstract

The invention discloses a linear solar heat collection pipeline, and relates to the technical field of molten salt pipeline arrangement, the linear solar heat collection pipeline comprises a molten salt main pipe, the molten salt main pipe comprises a plurality of molten salt sub-pipes and expansion hoses, and the plurality of molten salt sub-pipes and the expansion hoses are alternately arranged; the number of the fused salt branch pipes is multiple, and the multiple fused salt branch pipes are communicated with the fused salt main pipe through first connecting hoses; the sliding device is fixed at the lower end of the molten salt mother pipe; and one end of the molten salt mother pipe extends into the storage tank. The expansion hose is adopted to replace a traditional expansion joint structure, the use of electric heat tracing can be reduced, and therefore the manufacturing cost can be effectively reduced, the whole pipeline system is simple in structure, the salt dredging time is shortened, and the operation efficiency of the system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of molten salt pipeline arrangement, in particular to a linear solar energy heat collection pipeline. Background Art

[0002] Solar energy is the largest renewable energy that can be developed on Earth and has been widely used. Solar energy collection forms are divided into two categories: linear and nonlinear. The most widely used linear collection types are trough type and linear Fresnel type. The heating medium is mostly water, thermal oil or molten salt.

[0003] As we all know, the higher the temperature of the solar thermal collecting medium, the higher the power generation efficiency, so more and more solar thermal collecting media are beginning to use high-temperature molten salt. The advantage of molten salt as a heat transfer medium is high power generation efficiency. The disadvantage is that it is easy to get clogged if the temperature is not well controlled, and the pipeline needs to be electrically heated to prevent the molten salt from solidifying. The electric heating of the pipeline is a large part of the operating cost. The time needs to be shortened during the salt injection and salt drainage process to reduce the possibility of failure.

[0004] At present, in the linear solar molten salt collector pipeline system, the hot salt mother pipe uses a straight bend and expansion joints to eliminate the expansion of the pipeline. The larger the collector field, the longer the pipeline used to eliminate expansion, and electric heating is also required on the outside of the expansion joint. This leads to an increase in electric heating on the pipeline, and higher installation and operation costs.

[0005] Therefore, there is an urgent need in the market for a linear solar thermal collection pipeline to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a linear solar thermal collection pipeline for solving the technical problems existing in the above-mentioned prior art. An expansion hose is used to replace the traditional expansion joint, which can not only adapt to the expansion changes of the molten salt mother pipe, but also reduce costs.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The invention discloses a linear solar heat collection pipeline, comprising:

[0009] A molten salt mother pipe, the molten salt mother pipe comprises a plurality of molten salt sub-pipes and an expansion hose, and the plurality of molten salt sub-pipes and the expansion hose are alternately arranged;

[0010] Molten salt branch pipes, wherein the molten salt branch pipes are in plurality, and the plurality of molten salt branch pipes are connected to the molten salt main pipe via a first connecting hose;

[0011] A sliding device, wherein the sliding device is fixed to the lower end of the molten salt mother tube;

[0012] A storage tank, one end of the molten salt mother pipe extends into the storage tank.

[0013] Preferably, the sliding device comprises a horizontal slide rail and a plurality of tripods, the upper end of the tripod is fixedly connected to the molten salt sub-tube, and the lower end of the tripod is provided with two rollers, and the rollers can roll on the horizontal slide rail.

[0014] Preferably, a pipe clamp is fixed to the upper end of the tripod, and the tripod is fixedly connected to the molten salt sub-tube via the pipe clamp.

[0015] Preferably, the pipe clamp comprises two semicircular iron sheets, and two ends of the two semicircular iron sheets are fixedly connected by bolts and nuts respectively.

[0016] Preferably, the horizontal slide rail is fixed on a supporting base.

[0017] Preferably, the expansion hose and the first connecting hose are both made of stainless steel.

[0018] Preferably, a connecting pipe is provided at one end of the molten salt mother pipe, one end of the connecting pipe is fixedly connected to one end of the molten salt mother pipe close to the storage tank, and the other end of the connecting pipe extends into the interior of the storage tank.

[0019] Preferably, the storage tank is located underground, a slide groove is provided at the top entrance of the storage tank, and the connecting pipe is slidably connected to the slide groove.

[0020] Preferably, the storage tank is located on the ground, and the connecting pipe is connected to the molten salt mother pipe through a second connecting hose.

[0021] Preferably, it also includes a horizontal iron groove, and the second connecting hose is placed in the horizontal iron groove.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] The present invention adopts an expansion hose to replace the traditional expansion joint, which can effectively reduce the use of electric heating, thereby reducing the manufacturing and use costs. The use of the expansion hose can also effectively reduce the number of molten salt sub-pipes, and the entire pipeline system has a simple structure, shortens the salt drainage time, and improves the operating efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the structure of a linear solar heat collection pipeline in Example 1;

[0026] Figure 2 This is a schematic diagram of the structure of a tripod in a linear solar heat collection pipeline in Example 1;

[0027] Figure 3 This is a schematic diagram of the connection between the molten salt mother pipe and the storage tank in the linear solar heat collection pipeline of Example 1;

[0028] Figure 4 A top view of a storage tank in a linear solar heat collection pipeline in Example 1;

[0029] Figure 5 This is a schematic diagram of the connection between the molten salt mother pipe and the storage tank in the linear solar heat collection pipeline of Example 2;

[0030] In the figure: 1-molten salt sub-tube; 2-expansion hose; 3-horizontal slide rail; 4-support base; 5-tripod; 6-roller; 7-molten salt main pipe; 8-second connecting hose; 9-connecting pipe; 10-storage tank; 11-chute; 12-horizontal iron trough. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The purpose of the present invention is to provide a linear solar thermal collection pipeline for solving the technical problems existing in the above-mentioned prior art. An expansion hose is used to replace the traditional expansion joint, which can not only adapt to the expansion changes of the molten salt mother pipe, but also reduce costs.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Embodiment 1

[0035] like Figure 1-Figure 4 As shown, this embodiment provides a linear solar heat collection pipeline, including:

[0036] The molten salt mother pipe 7 includes a plurality of molten salt sub-pipes 1 and expansion hoses 2, and the plurality of molten salt sub-pipes 1 and the expansion hoses 2 are alternately arranged, that is, a molten salt sub-pipe 1 is fixed at each end of the expansion hose 2, and the expansion hoses 2 are distributed in a "J" shape. It can be understood that in the actual manufacturing process, a complete molten salt mother pipe 7 can be divided into multiple sections of molten salt sub-pipes 1, and two adjacent molten salt sub-pipes 1 are connected through the expansion hoses 2;

[0037] Molten salt branch pipes, there are several molten salt branch pipes, and the several molten salt branch pipes are connected with the molten salt mother pipe 7 through the first connecting hose, that is, the two ends of the first connecting hose are the molten salt mother pipe 7 (more precisely, the molten salt sub-pipe 1) and the molten salt branch pipe, in addition, the molten salt branch pipe and the molten salt mother pipe 7 are arranged perpendicular to each other, and the molten salt branch pipe is fixed by a branch pipe fixing frame, and the molten salt branch pipe is located above the molten salt mother pipe 7, so that the first connecting hose is in a suspended state;

[0038] A sliding device, the sliding device is fixed to the lower end of the molten salt sub-tube 1 in the molten salt mother tube 7;

[0039] The storage tank 10 , one end of the molten salt mother pipe 7 can extend into the storage tank 10 through the upper end opening of the storage tank 10 .

[0040] In actual use, when the molten salt mother pipe 7 expands due to excessively high temperature or contracts due to low temperature, each molten salt sub-pipe 1 undergoes corresponding deformation, thereby stretching or squeezing the expansion hose 2 located in the middle, and the expansion hose 2 uses its own deformability to eliminate the expansion. During this period, the molten salt sub-pipe 1 will be displaced due to its own deformation, and the sliding device can be used to cooperate with its displacement to reduce the friction generated during its displacement. In addition, the molten salt branch pipe will not be displaced during use, and its use is ensured to be connected to the molten salt mother pipe 7 by the deformation of the first connecting hose.

[0041] In this embodiment, the sliding device includes a horizontal slide rail 3 and a plurality of tripods 5. The upper end of the tripod 5 is fixedly connected to the molten salt sub-tube 1. The lower end of the tripod 5 is provided with two rollers 6. The horizontal slide rail 3 is provided with rolling grooves corresponding to the rollers 6. The rollers 6 can slide in the rolling grooves. The rolling grooves limit the rollers 6 to prevent them from sliding out. During installation, the rollers 6 can be pushed into along one end of the rolling grooves, thereby achieving the technical effect that the rollers 6 can roll on the horizontal slide rail 3.

[0042] In this embodiment, a pipe clamp is fixed to the upper end of the tripod 5, and the tripod 5 is fixedly connected to the molten salt sub-tube 1 through the pipe clamp. The molten salt sub-tube 1 can be effectively clamped by the pipe clamp, and the pipe clamp can be purchased on the market.

[0043] In this embodiment, for the specific structure of the pipe clamp, the pipe clamp includes two semicircular iron sheets, one of which is fixed to the upper end of the tripod 5, and an ear plate is fixed to each end of the two semicircular iron sheets, and a connection hole is provided on the ear plate, and the connection holes on both ends of the two semicircular iron sheets are fixedly connected by bolts and nuts. During actual installation, first align a semicircular iron sheet at the upper end of the tripod 5 with the molten salt sub-tube 1 to be fixedly connected, so that the molten salt sub-tube 1 to be installed is located above it, and then the other semicircular iron sheet is placed on the upper end of the molten salt sub-tube 1, and finally a bolt is used to pass through the connection hole at the upper end of the ear plate and then fixed with a nut.

[0044] In this embodiment, the horizontal slide rail 3 is fixed to the support base 4 by anchor screws, and the support base 4 is placed on the ground.

[0045] In this embodiment, the expansion hose 2 and the first connecting hose are both metal hoses, and the specific materials of the expansion hose 2 and the first connecting hose are both stainless steel. Compared with using the mechanical mechanism of the existing expansion joint to eliminate expansion, the metal hose can better eliminate the expansion of the molten salt mother pipe 7 by relying on its own flexibility and deformability. Furthermore, when a metal hose is used for connection, the number of molten salt sub-tubes 1 divided by a molten salt mother pipe 7 is relatively small; while when an expansion joint is used for connection, the number of molten salt sub-tubes 1 divided by a molten salt mother pipe 7 is relatively large, which is several times or even more than ten times that when a metal hose is used for connection. The specific number will also change according to the total length of the molten salt mother pipe 7. It can be further known that the use of metal hoses for connection can simplify the pipeline system, thereby shortening the salt drainage time and improving the operating efficiency of the system.

[0046] In this embodiment, a connecting pipe 9 is provided at one end of the molten salt mother pipe 7, one end of the connecting pipe 9 is fixedly connected to one end of the molten salt mother pipe 7 close to the storage tank 10, and the other end of the connecting pipe 9 extends into the interior of the storage tank 10, that is, the molten salt mother pipe 7 is connected to the storage tank 10 through a connecting pipe 9. The specific material of the connecting pipe 9 can be a metal hose or a pipe fitting of other materials.

[0047] In this embodiment, the storage tank 10 is located underground, and a chute 11 is provided at the top entrance of the storage tank 10, and the connecting pipe 9 is slidably connected to the chute 11. Because the molten salt sub-tube 1 at the end of the molten salt mother pipe 7 will deform, the connecting pipe 9 will also be displaced accordingly. In order to adapt to this displacement, the connecting pipe 9 can be allowed to move appropriately along the chute 11 to avoid the connection pipe 9 from breaking due to excessive deformation.

[0048] Embodiment 2

[0049] like Figure 5As shown, this embodiment provides a linear solar heat collecting pipeline, and the structure provided by the linear solar heat collecting pipeline is basically the same as the structure disclosed in the first embodiment, except that:

[0050] In this embodiment, the storage tank 10 is located on the ground, and the connecting pipe 9 is connected to the molten salt main pipe 7 through the second connecting hose 8. The second connecting hose 8 is also a metal hose made of stainless steel alloy.

[0051] In this embodiment, a horizontal iron groove 12 is also included. The horizontal iron groove 12 is an iron U-shaped groove structure. The second connecting hose 8 is placed in the horizontal iron groove 12. The two sides of the horizontal iron groove 12 can limit it so that the second connecting hose 8 can only expand and contract in the horizontal iron groove 12 and will not move randomly.

[0052] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A linear solar heat collecting pipeline, characterized in that: include: A molten salt mother pipe, wherein the molten salt mother pipe comprises a plurality of molten salt sub-pipes and an expansion hose, and the plurality of molten salt sub-pipes and the expansion hose are alternately arranged; Molten salt branch pipes, wherein the molten salt branch pipes are in plurality, and the plurality of molten salt branch pipes are connected to the molten salt main pipe via a first connecting hose; A sliding device, wherein the sliding device is fixed to the lower end of the molten salt mother tube; A storage tank, one end of the molten salt mother pipe extends into the storage tank.

2. The linear solar heat collecting pipeline according to claim 1, characterized in that: The sliding device comprises a horizontal slide rail and a plurality of tripods, the upper end of the tripod is fixedly connected to the molten salt sub-tube, and the lower end of the tripod is provided with two rollers, and the rollers can roll on the horizontal slide rail.

3. The linear solar heat collecting pipeline according to claim 2, characterized in that: A pipe clamp is fixed to the upper end of the tripod, and the tripod is fixedly connected to the molten salt sub-tube through the pipe clamp.

4. The linear solar heat collecting pipeline according to claim 3, characterized in that: The pipe clamp comprises two semicircular iron sheets, and two ends of the two semicircular iron sheets are fixedly connected by bolts and nuts respectively.

5. The linear solar heat collecting pipeline according to claim 2, characterized in that: The horizontal slide rail is fixed on a supporting base.

6. The linear solar heat collecting pipeline according to claim 1, characterized in that: The expansion hose and the first connecting hose are both made of stainless steel.

7. The linear solar heat collecting pipeline according to claim 1, characterized in that: A connecting pipe is provided at one end of the molten salt mother pipe, one end of the connecting pipe is fixedly connected to one end of the molten salt mother pipe close to the storage tank, and the other end of the connecting pipe extends into the interior of the storage tank.

8. The linear solar heat collecting pipeline according to claim 7, characterized in that: The storage tank is located underground, a slide groove is provided at the top entrance of the storage tank, and the connecting pipe is slidably connected to the slide groove.

9. The linear solar heat collecting pipeline according to claim 7, characterized in that: The storage tank is located on the ground, and the connecting pipe is connected to the molten salt mother pipe through a second connecting hose.

10. The linear solar heat collecting pipeline according to claim 9, characterized in that: It also includes a horizontal iron groove, in which the second connecting hose is placed.

Images