A trough type concentrator pipeline compensation device

Abstract

The present invention relates to a trough concentrator pipeline compensation device, comprising: a rotatable heat transfer oil channel, including multiple cylindrical rotary joints, multiple seamless steel pipes, multiple 90° elbows, connecting tees and positioning flanges, the rotatable heat transfer oil channel can rotate according to the changes in the altitude angle and azimuth of the sun, and can also compensate for the change in the position of the pipeline caused by the swing of the heat collection pipe bracket driven by the thermal expansion and contraction of the heat collection pipe; a retractable heat transfer oil channel, including a 90° elbow, a seamless steel pipe and a corrugated pipe, the retractable heat transfer oil channel can be retracted to compensate for the expansion of the external pipeline and misaligned welding. The technical solution of the present invention is safe and reliable, the structure is simple, and the pipeline compensation device is easy to install.

Description

Technical Field

[0001] The invention relates to the field of solar thermal power generation, and in particular to a trough concentrator pipeline compensation device. Background Art

[0002] Solar thermal power generation is an important aspect of solar energy utilization. Currently, there are four main types: trough type, tower type, Fresnel type and butterfly type. The basic process is: using solar concentrators to track the sun and concentrate solar radiation to the heat absorption device to obtain high-temperature thermal energy, and then use the thermal energy for conventional thermal power generation or other medium and high temperature utilization. The solar concentrator is a key component of solar thermal power generation and solar medium and high temperature utilization systems. This application mainly relates to a trough concentrator pipeline compensation device.

[0003] The trough concentrator in the prior art generally uses heat transfer oil as the heat transfer medium. The concentrator has high requirements for the circulation and sealing of the heat transfer oil during use. Since the altitude angle and azimuth angle of the sun will change in real time, the concentrator usually needs a device that can support the rotation of the heat transfer oil pipeline. At the same time, due to the change in the temperature of the heat transfer oil, the heat collecting pipe will expand and contract due to heat, so the concentrator also needs a device that can support the expansion and contraction of the heat transfer oil pipeline. There are roughly two forms of such devices in the prior art: one is the combination of a bellows and a rotary sealer, and the other is the use of three spherical rotary joints. However, due to the high temperature and pressure of the heat transfer oil, the bellows frequently swing and expand, which is extremely prone to fatigue damage and causes serious losses. The spherical rotary joint, due to frequent swinging, causes the sealing filler to be quickly consumed and the heat transfer oil to leak, which not only pollutes the environment, but also increases the labor intensity of the workers. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art that the heat transfer oil is easy to leak and the maintenance is frequent, so as to provide a pipeline compensation device which is safe, reliable, simple in structure and easy to install.

[0005] According to a first aspect of the present invention, a trough concentrator pipeline compensation device is provided, the pipeline compensation device comprising:

[0006] The rotatable heat transfer oil channel includes a plurality of cylindrical rotating joints, a plurality of seamless steel pipes, a plurality of 90° elbows, a connecting tee and a positioning flange. The rotatable heat transfer oil channel can rotate according to the changes in the altitude angle and azimuth angle of the sun, and can compensate for the change in the position of the pipeline caused by the swing of the heat collection tube bracket driven by the thermal expansion and contraction of the heat collection tube;

[0007] The retractable heat-conducting oil channel comprises a 90° elbow, a seamless steel pipe and a corrugated pipe. The retractable heat-conducting oil channel can be retracted to compensate for the expansion of an external pipeline and misaligned welding.

[0008] Furthermore, the rotatable heat transfer oil channel structure is:

[0009] One end of the first seamless steel pipe is fixed to the heat collecting pipe, and the other end is fixed to one end of the first cylindrical rotating joint through a first 90° elbow;

[0010] One end of the second seamless steel pipe is fixed to the other end of the first cylindrical rotary joint through a second 90° elbow, and the other end of the second seamless steel pipe is fixed to one end of the second cylindrical rotary joint through a third 90° elbow;

[0011] One end of the third seamless steel pipe is fixed to the other end of the second cylindrical rotary joint through a fourth 90° elbow, and the other end of the third seamless steel pipe is fixed to one end of the third cylindrical rotary joint through a fifth 90° elbow;

[0012] The other end of the third cylindrical rotating joint and one end of the fourth cylindrical rotating joint are respectively fixed to the first end and the second end of the connecting tee, the third end of the connecting tee is fixed to one side of the positioning flange, and the other side of the positioning flange is fixed to the concentrator rotation axis to ensure that the connecting tee is coaxial with the concentrator rotation axis.

[0013] Furthermore, the first seamless steel pipe is fixed to the top of the concentrator heat collecting tube bracket.

[0014] Furthermore, the cylindrical rotary joint comprises: a rotary shaft, a gland, a cylindrical pin, an outer positioning sleeve, an inner positioning sleeve and a housing;

[0015] Wherein, one end of the shell is a straight opening, and the other end is a tapered opening, a filler filling hole is provided on the side wall near the tapered opening, and a sealing device is provided on the filler filling hole;

[0016] The rotating shaft is arranged with clearance fit with the outer positioning sleeve and the inner positioning sleeve, and is inserted into the interior of the housing from the straight end as a whole, and the end is fixed by the gland;

[0017] A gap is provided between the inner positioning sleeve and the outer positioning sleeve, and a filler layer is provided in the gap;

[0018] The cylindrical pin is arranged in the gap between the gland, the shell and the outer positioning sleeve.

[0019] Furthermore, the inner surface of the outer positioning sleeve is provided with a plurality of oil grooves and a first conical surface in sequence, and the oil grooves are filled with grease.

[0020] Further, the rotation axis is, from left to right, a first cylindrical shape, a transition section, and a second cylindrical shape;

[0021] The transition section is a conical surface, and the conical surface cooperates with the first conical surface to form a first sealing surface;

[0022] The cylindrical surface of the second cylinder cooperates with the filler to form a second sealing surface.

[0023] Furthermore, the gland is connected to the housing via threads, and the pressing force between the sealing cone surface of the outer positioning sleeve and the sealing cone surface of the rotating shaft can be adjusted as required.

[0024] Furthermore, the retractable heat transfer oil channel structure is:

[0025] One end of the fourth seamless steel pipe is fixed to the other end of the fourth cylindrical rotary joint through the sixth 90° elbow, the other end of the fourth seamless steel pipe is fixed to one end of the corrugated pipe, and the other end of the corrugated pipe is fixed to other pipes.

[0026] Furthermore, the retractable heat transfer oil channel structure also includes a pipeline guide frame, which is fixed on the concentrator column to limit the swing of the fourth seamless steel pipe.

[0027] Furthermore, the retractable heat transfer oil channel structure also includes a pipeline support guide frame, and the pipeline support guide frame is fixed on the concentrator column to ensure that the corrugated pipe does not bear the gravity of the external pipeline.

[0028] Furthermore, the sealing surface of the cylindrical rotary joint is cylindrical, the sealing material is expandable graphite, and it only rotates but does not swing.

[0029] Furthermore, the first cylindrical rotating joint, the second cylindrical rotating joint, and the third cylindrical rotating joint are arranged parallel to each other, and the fourth cylindrical rotating joint is arranged perpendicular to the first cylindrical rotating joint, the second cylindrical rotating joint, and the third cylindrical rotating joint.

[0030] Furthermore, the large and small positioning stoppers on both sides of the positioning flange are coaxial, ensuring that the connecting tee is coaxial with the rotation axis of the concentrator.

[0031] Furthermore, the connecting tee is processed with a positioning boss to ensure that the connecting tee is coaxial with the cylindrical rotary joint.

[0032] Furthermore, the pipe support guide frame is fixed on the concentrator column to ensure that the bellows does not bear the gravity of the external pipe and limit the bellows to swing in only one direction.

[0033] According to a second aspect of the present invention, there is provided a trough concentrator, wherein the trough concentrator adopts the trough concentrator pipeline compensation device according to any one of the above aspects.

[0034] The advantages of the present invention are:

[0035] A trough concentrator pipeline compensation device of the present invention adopts a combination of a cylindrical rotating joint and a bellows. The cylindrical rotating joint can ensure that the sealing material (expandable graphite) is consumed extremely slowly during use and is maintenance-free throughout the entire use cycle. The bellows only compensates for thermal expansion and contraction of the external pipeline and misaligned welding. The expansion and contraction amount is very small, and there is no need to worry about damage during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the structure of a trough concentrator pipeline compensation device according to an embodiment of the present invention.

[0037] Figure 2 Schematic diagram of the structure of a cylindrical rotary joint according to an embodiment of the present invention.

[0038] Among them, 1-cylindrical rotary joint; 2-seamless steel pipe; 3-positioning flange; 4-90° elbow; 5-connecting tee; 6-pipe guide frame; 7-corrugated pipe; 8-pipe support guide frame DETAILED DESCRIPTION

[0039] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0040] The terms "first", "second", etc. in the specification and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein, for example.

[0041] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0042] Multiple includes two or more.

[0043] It should be understood that the term "and / or" used in the present invention is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone.

[0044] like Figure 1 As shown, a trough concentrator pipeline compensation device of the present invention includes: a cylindrical rotary joint 1, a seamless steel pipe 2, a positioning flange 3, a 90° elbow 4, a connecting tee 5, a pipeline guide frame 6, a bellows 7, and a pipeline support guide frame 8, wherein the cylindrical rotary joint 1 is welded in sequence through the 90° elbow 4, the seamless steel pipe 2, and the connecting tee 5 to form a heat transfer oil channel.

[0045] The topmost seamless steel pipe 2 is fixed to the top of the concentrator heat collecting pipe bracket, and the other end is welded to the heat collecting pipe.

[0046] One side of the positioning flange 3 is welded to the connecting tee 5, and the other side is fixed to the rotating axis of the concentrator to ensure that the connecting tee 5 is coaxial with the rotating axis of the concentrator.

[0047] The pipe guide frame 6 is fixed on the concentrator column to limit the swing of the seamless steel pipe 2. The top of the corrugated pipe 7 is welded to the seamless steel pipe 2, and the bottom is welded to other pipes to compensate for the expansion of the external pipe and the internal stress caused by misaligned welding. The pipe support guide frame 8 is fixed on the concentrator column to ensure that the corrugated pipe 7 does not bear the gravity of the external pipe.

[0048] The large and small positioning stoppers on both sides of the positioning flange 3 are coaxial, ensuring that the connecting tee 5 is coaxial with the concentrator rotation axis.

[0049] The connecting tee 5 is processed with a positioning boss to ensure that the connecting tee 5 is coaxial with the cylindrical rotary joint 1 .

[0050] The cylindrical rotary joint 1 has a cylindrical sealing surface, and the sealing material is expandable graphite, and it only rotates but does not swing.

[0051] The structure of the cylindrical rotary joint is as follows Figure 2 As shown. The cylindrical rotary joint includes: a rotating shaft, a pressure cover, a cylindrical pin, an outer locating sleeve, an inner locating sleeve and an outer shell; one end of the outer shell is a tapered neck, and a filler filling hole is provided on the side wall close to the tapered neck, and a sealing device is provided on the filler filling hole. The rotating shaft is arranged in a clearance fit with the outer locating sleeve and the inner locating sleeve, and is placed inside the outer shell, and the end is fixed by the pressure cover; a gap is provided between the inner locating sleeve and the outer locating sleeve, and a filler layer is provided in the gap. The cylindrical pin is arranged in the gap between the pressure cover and the outer shell and the outer locating sleeve. The inner surface of the outer locating sleeve is provided with a plurality of oil grooves and a first cone surface in sequence, and grease is filled in the oil groove.

[0052] The rotating shaft is, from left to right, a first cylinder, a transition section, and a second cylinder; the transition section is a conical surface, and the conical surface cooperates with the first conical surface to form a first sealing surface; the cylindrical surface of the second cylinder cooperates with the packing layer to form a second sealing surface.

[0053] The gland is connected to the housing via threads, and the pressing force between the sealing cone surface of the outer positioning sleeve and the sealing cone surface of the rotating shaft can be adjusted as required.

[0054] The material of the packing layer is preferably expandable graphite. The blocking device is preferably a bolt. The cylindrical pin is preferably a saddle pin. The plurality of oil grooves are preferably arranged equidistantly. The grease is preferably high-temperature grease, and whether the operating temperature range needs to be limited.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. A trough concentrator pipeline compensation device, characterized in that: The pipeline compensation device comprises: A rotatable heat transfer oil channel, comprising a plurality of cylindrical swivel joints, a plurality of seamless steel pipes, a plurality of 90° elbows, a connecting tee and a positioning flange, wherein the rotatable heat transfer oil channel can rotate according to changes in the altitude angle and azimuth angle of the sun; Wherein, the rotatable heat transfer oil channel structure is: One end of the first seamless steel pipe is fixed to the concentrator heat collecting tube, and the other end is fixed to one end of the first cylindrical rotating joint through a first 90° elbow; One end of the second seamless steel pipe is fixed to the other end of the first cylindrical rotary joint through a second 90° elbow, and the other end of the second seamless steel pipe is fixed to one end of the second cylindrical rotary joint through a third 90° elbow; One end of the third seamless steel pipe is fixed to the other end of the second cylindrical rotary joint through a fourth 90° elbow, and the other end of the third seamless steel pipe is fixed to one end of the third cylindrical rotary joint through a fifth 90° elbow; The other end of the third cylindrical rotating joint and one end of the fourth cylindrical rotating joint are respectively fixed to the first end and the second end of the connecting tee, the third end of the connecting tee is fixed to one side of the positioning flange, and the other side of the positioning flange is fixed to the concentrator rotation axis, ensuring that the connecting tee is coaxial with the concentrator rotation axis; Wherein, the cylindrical rotary joint comprises: a rotary shaft, a gland, a cylindrical pin, an outer positioning sleeve, an inner positioning sleeve and a housing; Wherein, one end of the shell is a straight opening, and the other end is a tapered opening, a filler filling hole is provided on the side wall close to the tapered opening, and a sealing device is provided on the filler filling hole; The rotating shaft is arranged with clearance fit with the outer positioning sleeve and the inner positioning sleeve, and is inserted into the interior of the housing from the straight end as a whole, and the end is fixed by the gland; A gap is provided between the inner positioning sleeve and the outer positioning sleeve, and a filler layer is provided in the gap; The cylindrical pin is arranged in the gap between the gland and the housing and the outer positioning sleeve; The inner surface of the outer positioning sleeve is provided with a plurality of oil grooves and a first conical surface in sequence, and the oil groove is filled with grease; the rotating shaft is sequentially provided with a first cylindrical shape, a transition section, and a second cylindrical shape from left to right; the transition section is a conical surface, and the conical surface cooperates with the first conical surface to form a first sealing surface; the cylindrical surface of the second cylindrical shape cooperates with the packing layer to form a second sealing surface; A retractable heat transfer oil channel, including a 90° elbow, a seamless steel pipe and a bellows, wherein the retractable heat transfer oil channel can be retracted to compensate for external pipe expansion and misaligned welding; Wherein, the retractable heat transfer oil channel structure is: One end of the fourth seamless steel pipe is fixed to the other end of the fourth cylindrical rotary joint through the sixth 90° elbow, the other end of the fourth seamless steel pipe is fixed to one end of the corrugated pipe, and the other end of the corrugated pipe is fixed to other pipes.

2. The pipeline compensation device according to claim 1, characterized in that: The first seamless steel pipe is fixed to the top of the concentrator heat collecting tube support.

3. The pipeline compensation device according to claim 1, characterized in that: The retractable heat-conducting oil channel structure also includes: A pipeline guide frame is fixed on the concentrator column.

4. The pipeline compensation device according to claim 1, characterized in that: The retractable heat-conducting oil channel structure also includes: The pipeline support guide frame is fixed on the concentrator column.

5. The pipeline compensation device according to claim 1, characterized in that: The large and small positioning stops on both sides of the positioning flange are coaxial.

6. The pipeline compensation device according to claim 1, characterized in that: The connecting tee is processed with a positioning boss.

7. A trough concentrator, wherein the trough concentrator adopts the trough concentrator pipeline compensation device according to any one of claims 1 to 6.

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