Waste heat recovery double-pipe heat exchanger capable of storing energy

Abstract

The utility model discloses a waste heat recovery double-pipe heat exchanger capable of storing energy, which comprises an outer pipe and an inner pipe arranged in the outer pipe, an inner pipe and outer pipe connecting piece is arranged on the outer wall of the inner pipe and located on the inner side of the outer pipe, and the inner pipe is fixed in the middle of the center line of the outer pipe along the length direction. A heat exchange cavity is formed between the inner wall of the outer pipe and the outer wall of the inner pipe. By arranging the inner pipe and outer pipe connecting piece, during use, the annular base is rotated to enable the guide-in groove and the limiting groove to be located on the same horizontal line, at the moment, the limiting batten on the inner pipe is inserted into the limiting groove through the guide-in groove, the annular base is rotated again to enable the guide-in groove and the limiting groove to be staggered, and the limiting batten is limited; therefore, positioning and fixing between the inner pipe and the outer pipe are completed at the moment, the fixing mode is rapid and convenient, the inner pipe is convenient to disassemble and overhaul, and the problems that in the prior art, welding construction is complex, disassembly and maintenance are not easy, or threaded connection sealing is difficult are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of double -pipe heat exchanger, especially a kind of double -pipe heat exchanger for waste heat recovery with energy storage. BACKGROUND

[0002] In the existing double-pipe heat exchanger technical field, welding, threaded connection or flange connection is usually used to realize the connection between double pipe and heat exchange pipe, that is, the connection positioning between inner tube and outer tube, wherein, although the welding connection is high in strength, it is complex in construction and difficult to disassemble and maintain;Although the threaded connection is convenient to install and disassemble, the sealing performance is susceptible to threaded wear, and long-term operation can cause leakage;Although the flange connection is reliable in sealing, it is complex in structure, high in cost and large in space occupation.

[0003] Especially for the application scenarios requiring frequent cleaning or replacing heat exchange pipe, the existing double-pipe heat exchanger adopts welding or threaded connection, and the design of inner connecting piece often cannot balance installation convenience, sealing reliability and cost benefit, with the disadvantages of inconvenient operation, high maintenance cost and limited overall performance of system. Therefore, the market urgently needs a double-pipe heat exchanger which is convenient for quick installation and disassembly and relatively low in cost. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the disadvantages in the prior art that the existing double-pipe heat exchanger adopts welding or threaded connection, and the design of inner connecting piece often cannot balance installation convenience, sealing reliability and cost benefit, with the disadvantages of inconvenient operation, high maintenance cost and limited overall performance of system, and provides a double-pipe heat exchanger for waste heat recovery with energy storage, which is positioned and fixed between inner tube and outer tube by setting inner and outer tube connecting piece, rotating annular seat to make lead-in groove and limiting groove on the same horizontal line when in use, inserting limiting strip on inner tube into limiting groove through lead-in groove, rotating annular seat again to make lead-in groove and limiting groove mutually staggered, limiting limiting strip, and completing the positioning and fixing between inner tube and outer tube at this time. Such fixing mode is quick and convenient, and convenient for disassembly and maintenance of inner tube, overcoming the disadvantages of complex welding construction, difficult disassembly and maintenance and sealing problem of threaded connection in the prior art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0006] The utility model discloses a kind of residual heat recovery with energy storage's double-pipe heat exchanger, including outer tube and the inner tube being placed in the outer tube, the outer wall of the inner tube is located the inside of the outer tube and is provided with inner and outer tube connecting piece, realize the inner tube and be fixed in the center line of the outer tube along length direction center, the outer tube inner wall and the outer wall of inner tube form heat exchange cavity, heat exchange cavity constitutes heat exchange medium flow region, liquid flows in inner tube, heat exchange medium flows in heat exchange medium flow region, liquid flow direction and heat exchange medium flow direction are opposite.

[0007] As preferred, the inner and outer tube connecting piece includes three limiting strips, three limiting strips are annularly and equidistantly distributed on the outer wall of the inner tube, and are collected and welded and fixed. An annular groove is formed at the opening of one end of the outer tube. The annular groove is slidably connected to the annular seat. Three limiting grooves are formed on the inner wall of the outer tube for cooperating with the limiting strips. Three lead-in grooves are formed on the inner wall of the annular seat corresponding to the limiting grooves. It should be noted that, in use, the annular seat is rotated so that the lead-in grooves and the limiting grooves are on the same horizontal line. At this time, the limiting strips on the inner tube are inserted into the limiting grooves through the lead-in grooves. The annular seat is rotated again so that the lead-in grooves and the limiting grooves are mutually misaligned. The limiting strips are limited. At this time, the positioning and fixing between the inner tube and the outer tube are completed.

[0008] As preferred, a plurality of arc flow control plates are misaligned welded between the two adjacent limiting strips. A plurality of through holes are formed through the arc flow control plates. A plurality of notches are equidistantly formed through the outer wall of the limiting strips along the length direction. In use, when the heat exchange medium flows in the heat exchange cavity between the inner wall of the outer tube and the outer wall of the inner tube, the flow rate of the heat exchange medium can be reduced by the composition of the arc flow control plates, the heat exchange time is improved, and the heat exchange medium is dispersed by the arc flow control plates. The heat exchange medium flows axially through the notches, so as to disperse the heat exchange medium and improve the heat exchange uniformity and the heat exchange efficiency.

[0009] As preferred, the two ends of the inner tube extend to the outside through the outer tube, and sealing joints are threadedly connected to the two ends of the inner tube. The sealing joints are used to seal the gap between the inner tube and the outer tube.

[0010] As preferred, a liquid inlet is formed at the upper part of one end of the outer wall of the outer tube. A liquid outlet is formed at the lower part of the other end of the outer wall of the outer tube. The plurality of outer tubes are connected in sequence through the liquid inlets and the liquid outlets to form a whole communication structure.

[0011] As preferred, an annular sliding groove is formed on the inner wall of the annular groove along the circumferential direction. A sliding block is welded to the outer wall of the annular seat. The sliding block is slidably connected to the annular sliding groove.

[0012] As preferred, the ring-shaped seat is inserted with a positioning pin, a pin hole for cooperating with the positioning pin is arranged on the inner wall of the ring-shaped groove, the ring-shaped seat is rotated so that the positioning pin corresponds to the position of the pin hole, the positioning pin is inserted into the pin hole by pressing, and positioning and fixing of the ring-shaped seat are realized.

[0013] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0014] The sleeve type heat exchanger for waste heat recovery capable of storing energy is fixed and positioned between the inner tube and the outer tube through the inner and outer tube connecting piece, the guide groove and the limiting groove are on the same horizontal line by rotating the ring-shaped seat, the limiting strip plate on the inner tube is inserted into the limiting groove through the guide groove, the ring-shaped seat is rotated again, the limiting strip plate is limited by the guide groove and the limiting groove being mutually staggered, positioning and fixing between the inner tube and the outer tube are completed, the fixing mode is quick and convenient, the inner tube is convenient to disassemble and overhaul, and the problems of complex welding construction, difficult disassembly and maintenance or sealing difficulty of threaded connection in the prior art are overcome.

[0015] When the heat exchange medium flows between the inner wall of the outer tube and the outer wall of the inner tube to form a heat exchange cavity, the flow speed of the heat exchange medium is reduced, the heat exchange time is improved, the heat exchange medium is dispersed by the arc-shaped flow slowing plate, the heat exchange medium flows axially through the notch, the heat exchange medium is dispersed, and the heat exchange uniformity and the heat exchange efficiency are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the utility model;

[0017] Figure 2 It is a sectional view of the whole structure of the utility model;

[0018] Figure 3 It is a structure schematic view of the inner tube in the utility model;

[0019] Figure 4 It is a structure schematic view of the outer tube in the utility model Figure 1 ;

[0020] Figure 5 It is a structure schematic view of the outer tube in the utility model Figure 2 .

[0021] Reference signs: 1, inner tube; 11, limiting strip plate; 12, notch; 13, arc-shaped flow slowing plate; 14, through hole; 2, outer tube; 21, liquid inlet; 22, limiting groove; 23, ring-shaped groove; 24, ring-shaped sliding groove; 25, ring-shaped seat; 26, guide groove; 27, positioning pin; 3, sealing joint. DETAILED DESCRIPTION

[0022] The following will be combined with the drawingsFigure 1 - the Figure 5 Further description of the specific embodiments of the heat recovery sleeve heat exchanger capable of energy storage overcomes the shortcomings of the prior art, in which the existing sleeve heat exchanger is connected by welding or threading, and the design of the inner connecting piece often cannot balance the convenience of installation, sealing reliability and cost effectiveness, and has the disadvantages of inconvenient operation, high maintenance cost and limited overall system performance. The heat recovery sleeve heat exchanger capable of energy storage is provided by setting the inner and outer tube connecting pieces. When in use, the annular seat is rotated to make the lead-in groove and the limiting groove on the same horizontal line. At this time, the limiting strip plate on the inner tube is inserted into the limiting groove through the lead-in groove, and the annular seat is rotated again to make the lead-in groove and the limiting groove mutually staggered to limit the limiting strip plate. At this time, the positioning and fixing between the inner tube and the outer tube are completed. This fixing method is quick and convenient, and facilitates the disassembly and maintenance of the inner tube. The welding construction in the prior art is complex and not easy to disassemble and maintain, and the sealing problem of threaded connection is overcome. The heat recovery sleeve heat exchanger capable of energy storage is not limited to the following embodiments.

[0023] Embodiment 1:

[0024] A heat recovery sleeve heat exchanger capable of energy storage includes an outer tube 2 and an inner tube 1 placed in the outer tube 2. An inner and outer tube connecting piece is arranged on the outer wall of the inner tube 1 on the inner side of the outer tube 2 to realize the central fixing of the inner tube 1 on the center line of the outer tube 2 in the length direction. A heat exchange cavity is formed between the inner wall of the outer tube 2 and the outer wall of the inner tube 1, and the heat exchange cavity constitutes a heat exchange medium flow area. The liquid flows in the inner tube 1, and the heat exchange medium flows in the heat exchange medium flow area. The flow direction of the liquid is opposite to the flow direction of the heat exchange medium.

[0025] The two ends of the inner tube 1 extend to the outside through the outer tube 2, and threaded connectors 3 are connected on the two ends of the inner tube 1. The threaded connectors 3 are used to seal the gap between the inner tube 1 and the outer tube 2.

[0026] A liquid inlet 21 is arranged on the upper part of one end of the outer wall of the outer tube 2, and a liquid outlet is arranged on the lower part of the other end of the outer wall of the outer tube 2. The outer tubes 2 are connected in sequence by the liquid inlets 21 and the liquid outlets to form an overall communication structure.

[0027] A ring-shaped sliding groove 24 is arranged on the inner wall of the annular groove 23 along the circumference thereof, and a sliding block is welded on the outer wall of the annular seat 25. The sliding block is in sliding connection with the ring-shaped sliding groove 24.

[0028] The inner and outer tube connecting piece comprises three limiting strips 11, which are annularly and equidistantly distributed on the outer wall of the inner tube 1. An annular groove 23 is formed at the opening of one end of the outer tube 2, and the annular groove 23 is slidably connected to an annular seat 25. Three limiting grooves 22 for cooperating with the limiting strips 11 are formed on the inner wall of the outer tube 2. Three lead-in grooves 26 corresponding to the limiting grooves 22 are formed on the inner wall of the annular seat 25. It should be noted that, in use, the annular seat 25 is rotated so that the lead-in grooves 26 are on the same horizontal line as the limiting grooves 22. At this time, the limiting strips 11 on the inner tube 1 are inserted into the limiting grooves 22 through the lead-in grooves 26. The annular seat 25 is rotated again so that the lead-in grooves 26 and the limiting grooves 22 are misaligned with each other, and the limiting strips 11 are limited. At this time, the positioning and fixing between the inner tube 1 and the outer tube 2 are completed. The fixing between the inner tube 1 and the outer tube 2 is quick and simple, and does not need welding or bolt fixing, overcoming the defects of welding or bolt fixing in the prior art.

[0029] Embodiment 2

[0030] A plurality of arc flow retarders 13 are misaligned and welded between two adjacent limiting strips 11. A plurality of through holes 14 are formed through the arc flow retarders 13. A plurality of notches 12 are equidistantly formed through the outer wall of the limiting strips 11 along the length direction. In use, when the heat exchange medium flows in the heat exchange cavity between the inner wall of the outer tube 2 and the outer wall of the inner tube 1, the flow rate of the heat exchange medium is reduced by the composition of the arc flow retarders 13, the heat exchange time is improved, and the heat exchange medium is dispersed by the arc flow retarders 13, so that the heat exchange medium flows axially through the notches 12, thereby dispersing the heat exchange medium and improving the heat exchange uniformity and heat exchange efficiency.

[0031] In this embodiment, the arc flow retarders 13 are added on the basis of the inner and outer tube connecting piece. The arc flow retarders 13 can adjust the strength of the three limiting strips 11, improve the strength of the inner tube 1 and the outer tube 2 as the connecting piece, reduce the flow rate of the heat exchange medium, improve the heat exchange time, and disperse the heat exchange medium by the arc flow retarders 13, so that the heat exchange medium flows axially through the notches 12, thereby dispersing the heat exchange medium and improving the heat exchange uniformity and heat exchange efficiency.

[0032] Embodiment 3

[0033] The annular seat 25 is inserted with a positioning pin 27, and a pin hole corresponding to the positioning pin 27 is formed on the inner wall of the annular groove 23. The annular seat 25 is rotated so that the positioning pin 27 corresponds to the position of the pin hole. The positioning pin 27 is inserted into the pin hole by pressing, thereby realizing the positioning and fixing of the annular seat 25.

[0034] Specifically, in the embodiment, the positioning pin 27 is arranged to position the annular seat 25, when the annular seat 25 is rotated to make the lead-in groove 26 and the limiting groove 22 be mutually dislocated, the positioning pin 27 is pressed to be inserted into the pin hole corresponding to the position of the pin hole, so that the annular seat 25 is positioned and fixed. It should be noted that the pin hole is shown in the following. Figure 4 In specific use, the pin hole is blocked by the annular seat 25, and a triangular mark can be arranged at the corresponding position on the inner wall of the outer pipe 2, so that the user can know the position of the pin hole, and the positioning pin 27 can be pressed to be inserted into the pin hole when the positioning pin 27 is rotated to the position of the triangular mark.

[0035] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by the skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A heat recovery double pipe heat exchanger capable of storing energy, comprising an outer pipe (2) and an inner pipe (1) disposed in the outer pipe (2), characterized in that, The outer wall of the inner tube (1) is provided with an inner-outer tube connector on the inner side of the outer tube (2), so that the inner tube (1) is fixed on the center line of the outer tube (2) in the length direction, and a heat exchange cavity is formed between the inner wall of the outer tube (2) and the outer wall of the inner tube (1), which constitutes a heat exchange medium flow area; The inner-outer tube connector comprises three limiting strips (11) which are annularly and equidistantly distributed on the outer wall of the inner tube (1), an annular groove (23) is formed at the opening of one end of the outer tube (2), the annular groove (23) is slidably connected to an annular seat (25), three limiting grooves (22) are formed on the inner wall of the outer tube (2) for cooperating with the limiting strips (11), and three lead-in grooves (26) are formed on the inner wall of the annular seat (25) corresponding to the limiting grooves (22).

2. A double pipe heat exchanger for waste heat recovery capable of storing energy according to claim 1, characterized in that: A plurality of arc flow slowing plates (13) are cross-welded between the two adjacent limiting strips (11), a plurality of through holes (14) are formed through the arc flow slowing plates (13), and a plurality of notches (12) are formed through the outer wall of the limiting strips (11) in the length direction at equal intervals.

3. A double pipe heat exchanger for waste heat recovery capable of storing energy as claimed in claim 1, wherein: The two ends of the inner tube (1) extend to the outside through the outer tube (2), and sealing joints (3) are threadedly connected to the two ends of the inner tube (1), which are used for sealing the gap between the inner tube (1) and the outer tube (2).

4. A double pipe heat exchanger for waste heat recovery capable of storing energy as claimed in claim 1, wherein: An inlet (21) is formed on the upper part of one end of the outer wall of the outer tube (2), an outlet is formed on the lower part of the other end of the outer wall of the outer tube (2), and a plurality of outer tubes (2) are connected in sequence through the inlet (21) and the outlet to form an overall communication structure.

5. A double pipe heat exchanger for waste heat recovery capable of storing energy as claimed in claim 1, wherein: An annular sliding groove (24) is formed on the inner wall of the annular groove (23) in the circumferential direction, and a sliding block is welded to the outer wall of the annular seat (25), which is slidably connected to the annular sliding groove (24).

6. A double pipe heat exchanger for waste heat recovery capable of storing energy as claimed in claim 5 wherein: A positioning pin (27) is inserted into the annular seat (25), a pin hole is formed on the inner wall of the annular groove (23) for cooperating with the positioning pin (27), the annular seat (25) is rotated so that the positioning pin (27) corresponds to the position of the pin hole, the positioning pin (27) is pressed into the pin hole, and the annular seat (25) is positioned and fixed.

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