WO2015024518A1

WO2015024518A1 - Cylindrical gradient heat accumulator and manufacturing method thereof

Info

Publication number: WO2015024518A1
Application number: PCT/CN2014/084877
Authority: WO
Inventors: 朱亚农; 顾向明; 姚利森; 田伟丰; 彭才元
Original assignee: 上海工电能源科技有限公司
Priority date: 2013-08-22
Filing date: 2014-08-21
Publication date: 2015-02-26

Abstract

Disclosed are a cylindrical gradient heat accumulator having a barrel capable of adapting to the shrinking and expansion of a heat exchange tube, and a manufacturing method thereof. The cylindrical gradient heat accumulator comprises a heat accumulating medium container and a heat exchange tube passing therethrough, a heat exchange medium circulating in the heat exchange tube; the heat accumulating medium container is a horizontal cylindrical barrel (6); two ends of the barrel (6) are respectively provided with a tube plate (2); the heat exchange tube passes through the tube plate (2), and is welded and sealed to the tube plate (2); the periphery of the barrel (6) is provided with an expansion joint (8) capable of adaptive adjustment of the barrel length. The heat exchange tube can also be U-shaped, and passes in and out from one end of the barrel (6). The heat accumulator and method avoid the problems of liquid retention and air lock caused by bending the heat exchange tube, and allow the heat exchange medium to smoothly circulate, improving heat exchange efficiency. In addition, a support plate (5) spot welded after being segmented is employed to support a heat exchange branch tube (4), simplifying the assembly process.

Description

Technical field

The present invention relates to a heat exchange apparatus, and more particularly to a cylindrical gradient heat accumulator in which a cylinder can accommodate expansion of a heat exchange tube and a method of manufacturing the same.

Background technique

In the conventional tube-type regenerator, the heat transfer medium passes through the heat transfer tubes, the heat storage medium is placed in the box-shaped housing, and the heat exchange tubes pass through the heat storage medium.

Advantages of the tube-type regenerator: It is stable in placement, simple in support structure, easy to manufacture, and convenient to transport. It is suitable for working conditions where the temperature of the direct heat exchange tube is not large at low temperature.

Disadvantages of the tube-type regenerator: 1 Because the thermal expansion and contraction of the heat-exchange tube is greater than the thermal expansion and contraction of the box, and the geometrical characteristics of the box determine that the expansion joint can not be installed on the box, which can be reliably sealed. It can follow the structure of thermal expansion and contraction of the heat exchange tube, so the heat exchange tube cannot be welded to the box at the same time at both ends, and at least one end must pass freely through the box; 2 if both ends of the heat exchange tube are free to pass through the box, then Another problem is that the heat exchange tube passes through the tank below the surface of the heat storage medium, which causes the heat storage medium to leak. The heat exchange tube bends upward from the surface of the heat storage medium and passes through the tank. It is of course possible for the medium to be a single-phase (liquid or gas phase) fluid, but if the heat transfer medium is a two-phase fluid (such as water) that undergoes a phase change during heat storage, the liquid phase fluid will remain in the horizontal section. The gas phase fluid is retained in the curved section at both ends of the tube to form a gas plug, thus hindering the flow and heat transfer of the heat transfer medium; 3 if one end of the heat exchange tube is free to pass through the tank above the surface of the heat storage medium, the other end is low If the surface of the heat storage medium is welded to the box, there is no multi-layer in the single box. The piping affects the heat exchange efficiency, thus resulting in a large volume and scale of the entire heat storage device. Disclosure of invention

The object of the present invention is to overcome the inconsistent thermal expansion and contraction of the heat exchange tube and the box of the existing tube-type heat accumulator, so that the heat exchange tube cannot be welded to the box at the same time, and the heat exchange tube needs to be bent upward. The inlet and outlet are set higher than the position of the heat storage medium, which brings a series of problems such as liquid phase retention, gas plug and low heat exchange efficiency in the heat exchange tube, and provides a cylinder whose cylinder can be adjusted with thermal expansion and contraction of the heat exchange tube. Gradient heat accumulator, and a method of manufacturing the cylindrical gradient heat accumulator.

The present invention also provides a cylindrical gradient heat accumulator that enters and exits the cylinder from a single side using a u-shaped tube, and a method of manufacturing the cylindrical gradient heat accumulator.

The technical solution adopted by the present invention to solve the technical problem thereof is: a cylindrical gradient heat accumulator comprising a heat storage medium container and a heat exchange tube passing through the heat storage medium container, wherein the heat exchange medium flows through the heat exchange tube, The heat storage medium container is a horizontal cylindrical cylinder body, and the tube body is respectively provided with a tube plate at both ends thereof, the heat exchange tube passes through the tube plate and is welded and sealed with the tube plate, and an adaptive adjusting cylinder is further arranged on the circumference of the barrel body. a length expansion joint, the heat exchange tube comprises a heat exchange manifold welded to the tube sheet and a heat exchange branch tube disposed in the cylinder body, and one heat exchange manifold corresponds to a plurality of heat exchange branch tubes, and the heat exchange main tube and the corresponding plurality of heat exchange tubes The hot branch pipe is connected and docked through the header box, and the support body is further provided with a support plate supporting the heat exchange branch pipe. The outer edge of the support plate is matched with the inner surface of the cylinder body, and the support plate is provided with a plurality of rows of pipe holes, and each pipe hole of each row At the same level, each heat exchange branch pipe passes through the corresponding pipe hole on the support plate. The heat exchange tube and the tube sheet at the end of the barrel are welded and sealed, and the expansion joint is used to adaptively adjust the difference between the expansion and contraction between the barrel and the heat exchange tube, compared with the tube box type heat accumulator described in the background art. The inlet and outlet of the heat exchange tube into and out of the cylinder need not protrude above the heat storage medium. Therefore, the heat exchange tube can be horizontally arranged to avoid the exchange in the heat exchange tube. Unfavorable conditions such as liquid phase retention and gas plug caused by vapor-liquid phase change of the heat medium. At the same time, since each heat exchange pipe only occupies one horizontal plane, a plurality of heat exchange pipes can be arranged from top to bottom in the cylinder body, thereby improving heat exchange efficiency and reducing the overall volume and scale of the heat storage device. The heat exchange pipeline is connected to the header tank, and after the steady flow and the split flow of the header tank, a plurality of heat exchange branch pipes are connected, and the plurality of heat exchange branch pipes are arranged to increase the heat exchange area and improve the heat exchange efficiency. The heat exchanger branch pipe has small diameter and large length. The support plate is arranged to support the heat exchange branch pipe to avoid deformation of the heat exchange branch pipe. A support plate is arranged at every other stage in the cylinder body, and the number of support plates is selected according to the length of the cylinder body. In addition, the heat exchange partition can divide the inner portion of the cylinder along the heat exchange tube into a plurality of relatively independent spaces, and sequentially store heat or heat in the direction of the heat exchange tube to realize gradient heat storage.

Preferably, a plurality of mutually independent heat exchange tubes are arranged in the cylinder body from top to bottom. The heat exchange tube and the end face of the cylinder are sealed and welded, so that each heat exchange tube can be set as a horizontal tube occupying only one horizontal plane, and a plurality of heat exchange tubes are arranged in different horizontal planes in the cylinder body to form a three-dimensional heat exchange branch tube bundle, and heat exchange efficient. The heat exchange tube in the heat exchange medium container is divided into multiple, each heat exchange tube is a horizontal tube including a heat exchange main pipe, a header box, a heat exchange branch pipe, a heat exchange medium is circulated in the heat exchange tube, and between the heat exchange tubes Not connected, this avoids gas-liquid stratification which can greatly affect the establishment of the regenerator temperature gradient. The header of the unit is also in the heat storage medium container compared to conventional heat exchangers.

Preferably, the height of the header is greater than the height of the heat exchange manifold and the heat exchange branch, and the headers of the adjacent heat exchange tubes are staggered in the direction of the cylinder. After the headers are staggered from each other, a certain overlap can be formed in the vertical direction to make the heat exchange tubes more closely arranged.

Preferably, the heat exchange branches of the same heat exchange tube are arranged on the same horizontal plane. Ensure the flow of heat exchange medium in each heat exchange branch. Preferably, the support plate is cut along the central height line of each row of tube holes to form a plurality of support strips. After the support strips and the heat exchange branch tubes are stacked and assembled in sequence, the upper and lower adjacent support strips are spot welded and fixed. The support plate is divided into a plurality of horizontal strips by wire cutting, which is convenient for assembly with the heat exchange branch pipe. The multilayer heat exchange branch pipe and the support bar are alternately stacked and assembled, and the support bars are re-fixed into a support plate by spot welding.

Preferably, the heat exchange branch sleeve welds the spiral fin to form a finned tube, and the spiral fin leaves a space for mounting at a position where the heat exchange branch tube and the support plate are connected.

Preferably, the heat exchange main pipe and the header may be formed by bending the same pipe. After bending the heat exchange main pipe end by 90 degrees, the bent end is the header, and then a plurality of communication holes are formed in the side wall of the header to be respectively connected with the heat exchange branch pipe.

Preferably, the inner side of the cylinder at the expansion joint position is provided with an annular lining plate, and the lining plate is provided with a slit along the direction of the cylinder body, one end of the lining plate is welded and fixed to the inner wall of the cylinder on the side of the expansion joint, and the other end of the lining plate is fixed. Sliding fit with the inner wall of the cylinder on the other side of the expansion joint. The lining plate maintains the inner wall of the cylinder at the expansion joint, and guides when the assembled heat exchange tube bundle is inserted into the cylinder, and ensures that the cylinders on both sides of the expansion joint are not relatively misaligned. At the same time, the slit is slit on the liner, and when the expansion joint is expanded and contracted, the heat storage medium can enter and exit the expansion joint from the slit.

A manufacturing method of the above-mentioned cylindrical gradient heat accumulator comprises the following steps: a. respectively, the cylinder body is divided into two sections, one of the inner side wall is welded with the lining plate, the lining plate is inserted into the other cylinder body, and two The segment cylinder is fixedly connected by the expansion joint;

b. Making a plurality of heat exchange tubes, each of which is made as follows: The plurality of heat exchange branches are arranged in the same horizontal direction, and the two ends of each heat exchange branch are respectively welded on the two headers, and the other side of the header is welded and exchanged The main pipe, the heat-conducting branch pipe is sheathed with spiral fins, and the spiral fins are formed at fixed positions. Intermittent for installation with the support plate;

C. Select a number of circular steel plates with an outer diameter slightly smaller than the inner diameter of the cylinder and passing through the lining plate as the support plate. The middle of the support plate is punched with a plurality of rows of pipe holes, and the hole diameter of the pipe is matched with the heat exchange branch pipe. The hole spacing is consistent with the heat exchange branch of each heat exchange tube, and each row of tube holes is located at the same horizontal line;

d. Performing a line cutting along the center line of each row of the support holes of the support plate, each support plate is cut into a plurality of support strips, so that the adjacent side faces of the upper and lower adjacent support bars respectively have corresponding half pipe holes; e, the lowermost The heat exchange branch pipe of the side heat exchange tube is clamped into the half pipe hole of the lowermost support bar, and then the lower support bar is fastened to the lowermost support bar for spot welding, and the support bars are alternately stacked in this order. The heat exchange tube is formed with a heat exchange branch tube bundle supported by the support plate, and the heat exchange tube headers adjacent to each other are alternately staggered when stacked;

f. feeding the heat exchange branch pipe bundle from the end of the cylinder into the cylinder body, and keeping the heat exchange main pipe at the outlets of both ends of the cylinder body;

g. Fasten the tube sheets at both ends of the cylinder so that the heat exchange tubes pass through the tube sheets and are welded and welded to the tube sheets.

The barrel and the heat exchange tube of the solution are adaptively adjusted and swelled, and the heat exchange tube does not have to be bent, and can be set as a horizontal straight tube.

Another technical solution adopted by the present invention to solve the technical problem thereof is: a cylindrical gradient heat accumulator comprising a heat storage medium container and a heat exchange tube passing through the heat storage medium container, and a heat exchange medium flowing through the heat exchange tube The heat storage medium container is a sealed casing with a tube plate on one side and the other sides closed, the heat exchange tube is a U-shaped tube, and the bent portion is located in the heat storage medium container, and both ends of the heat exchange tube are from the tube The plate is pierced and welded and sealed with the tube sheet, and both ends of the heat exchange tube For the heat exchange manifold welded with the tube sheet, the middle part is a plurality of u-shaped heat exchange branch pipes arranged in the heat storage medium container, one heat exchange main pipe corresponds to a plurality of heat exchange branch pipes, the heat exchange main pipe and the corresponding multiple heat exchange tubes The branch pipe is connected and connected by a header, and the heat storage medium container is arranged with a plurality of heat exchange tubes which are independent of each other and not connected to each other from top to bottom, and the heat storage medium container is further provided with a plurality of supports supporting the heat exchange branch pipe The outer edge of the support plate is adapted to the inner surface of the heat storage medium container, and the support plate is provided with a plurality of rows of tube holes, each of the tube holes of each row is at the same level, and each heat exchange branch tube is worn from the corresponding tube hole of the support plate A vertical and vertical partition is disposed between the two straight sections of the heat storage medium container and the u-shaped heat exchange tube. The heat exchange tube is u-shaped in the heat storage medium container, and the heat exchange tube is fed into and out of the two ends of the heat storage medium container while being welded and sealed on the same side of the tube plate, and the portion of the heat exchange tube located in the heat storage medium container can be The heat storage medium container has a degree of expansion and contraction, which satisfies the requirement of thermal expansion and contraction of the heat exchange tube. Compared with the tube box type heat accumulator described in the background art, the inlet and outlet of the heat exchange tube into and out of the heat storage medium container are from both sides. It becomes a one-sided side, avoiding the problem that the heat storage medium container and the heat exchange tube are inconsistent in thermal expansion and contraction. Therefore, the heat exchange pipe can be horizontally arranged to avoid the liquid phase caused by the vapor-liquid phase change of the heat exchange medium in the heat exchange pipe. Unfavorable conditions such as detention and gas plugs. At the same time, since each heat exchange tube occupies only one horizontal plane, a plurality of heat exchange tubes can be arranged in different horizontal planes from top to bottom in the heat storage medium container, thereby improving heat exchange efficiency and reducing the overall volume and scale of the heat storage device. The tube plate of the heat exchange tube and the end surface of the heat storage medium container is sealed and welded, so that the heat exchange tube passes through the heat storage medium container and does not leak even under the liquid level of the heat storage medium, so that each heat exchange tube can be set to only The horizontal tube occupying a horizontal plane, the heat storage medium container is provided with a plurality of heat exchange tubes at different horizontal planes to form a three-dimensional heat exchange branch tube bundle, and the heat exchange efficiency is high. There are a plurality of heat exchange tubes in the heat storage medium container, and each heat exchange tube is a horizontal tube including a heat exchange main pipe, a header, and a heat exchange branch pipe, and a heat exchange tube The heat exchange medium flows inside, and the heat exchange tubes are not connected to each other, so that the gas-liquid stratification can be avoided, which greatly affects the establishment of the temperature gradient of the heat accumulator. Compared with the conventional heat exchanger, the header of the device is also in the heat storage medium container, and only the heat exchange manifold is passed through the tube plate instead of the more heat exchange branch pipe, which reduces the crossing point where the welding seal is required. The heat exchanger branch pipe has small diameter and large length, and the support plate is arranged to support the heat exchange branch pipe to avoid deformation of the heat exchange branch pipe. A support plate is arranged in every section of the heat storage medium container, and the number of the support plates is selected according to the length of the heat exchange branch pipe. The temperature of the heat exchange medium flowing in the two straight sections of the u-shaped heat exchange tube is different, and the temperature gradient is formed by the partitions to improve the heat exchange efficiency. In the synergy of the partition plate and the support plate, the cylinder body is divided into heat exchange chambers distributed along the flow direction of the heat exchange medium of the heat exchange tube to form a plurality of heat storage spaces with temperature gradients, thereby improving heat exchange efficiency.

Preferably, the u-shaped section of the heat exchange tube is located at the deepest point where the heat exchange branch extends into the heat storage medium container. The heat exchange main pipe is connected to the header, and after the steady flow and the split flow of the header, a plurality of heat exchange branch pipes are connected, and the plurality of heat exchange branch pipes are arranged to increase the heat exchange area and improve the heat exchange efficiency.

Preferably, the heat exchange branches of the same heat exchange tube are arranged on the same horizontal plane, and the bending radius of the heat exchange branch pipes arranged from the outside to the inside is gradually reduced. Ensure the flow of heat exchange medium in each heat exchange branch.

Preferably, the height of the header is greater than the height of the heat exchange manifold and the heat exchange branch, and the headers of the adjacent heat exchange tubes are staggered along the heat transfer tube conveying direction. After the headers are staggered from each other, a certain overlap can be formed in the vertical direction to make the heat exchange tubes more closely arranged.

Preferably, the tube holes on the support plate are symmetrically arranged, and the two straight line portions of the U-shaped heat exchange branch tube are symmetrically arranged in the tube holes on both sides of the support plate symmetrically disposed.

Preferably, the support plate is cut along the central height line of each row of tube holes to form a plurality of branches. After the struts, the support strips and the heat exchange branch tubes are stacked and assembled in turn, the upper and lower adjacent support bars are spot welded and fixed. The support plate is divided into a plurality of horizontal strips by wire cutting, which is convenient for assembly with the heat exchange branch pipe. The multilayer heat exchange branch pipe and the support bar are alternately stacked and assembled, and the support bars are re-fixed into a support plate by spot welding.

Preferably, the heat exchange branch straight section is welded with the spiral fin to form a finned tube, and the spiral fin has a space for mounting at a position where the heat exchange branch and the support plate are connected.

As a further preference, the spacer divides each of the support plates into left and right portions, and the two portions of the support plates are welded and fixed to the spacer.

Preferably, the heat exchange main pipe and the header may be formed by bending the same pipe. After bending the heat exchange main pipe end horizontally by 90 degrees, the bent end is the header, and then a plurality of communication holes are formed in the side wall of the header to be respectively connected with the heat exchange branch pipe.

Preferably, the said heat storage medium container is a square box or a horizontal cylindrical barrel.

A method for manufacturing the above U-tube gradient heat accumulator comprises the following steps: a. manufacturing a heat storage medium container, making a housing open on one side, and a tube plate matching the open side;

b. Make a plurality of heat exchange tubes, each of which is made as follows: Make a plurality of U-shaped heat exchange branches whose radius of curvature is gradually reduced, and arrange them from the outside to the inside to the same horizontal plane, and weld the two ends of each heat exchange branch separately On the two headers, the other side of the header is welded to the heat exchange manifold, and the heat exchanger branch is sheathed with spiral fins, and the spiral fins are intermittently arranged at intervals to be mounted with the support plate;

c. Select a number of steel plates with a size slightly smaller than the cross-sectional dimension of the heat storage medium container as a support In the middle of the support plate, a plurality of rows of pipe holes are punched in, and the hole diameter of the pipe hole is matched with the gap of the heat exchange branch pipe. Each row of pipe holes is divided into two parts, which are respectively corresponding to the straight sections of the two U-shaped heat exchange branch pipes and are maintained. The intervals are the same, and each row of holes is at the same horizontal line;

d. Cut the support plate into two parts on the left and right along the vertical center line of the support plate, and cut the horizontal line along the horizontal line of each row of the support plate to cut each support plate into a plurality of support bars, so that the two supports adjacent to each other The adjacent sides of the strip respectively have corresponding half tube holes;

e. selecting a partition that is highly adapted to the longitudinal center plane of the heat storage medium container, and inserting between the two straight sections of the U-row heat exchange branch pipe;

f. The bottom left and right support bars are respectively welded to the bottoms of the two sides of the partition plate, and the heat exchange branch pipe of the lowermost heat exchange tube is clamped to the half pipe hole of the lowermost support bar, and then the lower part of the support tube The support strip is fastened on the lowermost support strip for spot welding and welded to the partition plate, and the support strip and the heat exchange tube are alternately stacked in this order, and the two sides of the partition plate are kept in the same operation, and the support plate is supported, a heat exchanger branch pipe bundle separated by a partition;

g. The heat exchange manifold passes through the tube sheet and is sealed and welded with the tube sheet, and the heat exchange branch tube bundle is fed from the opening side of the heat storage medium container casing, and the outer edge of the tube sheet is sealed and fastened to the open side of the heat storage medium container casing.

The heat exchange tube of the present scheme has a U shape and enters and exits from the side of the heat storage medium container, and the thermal expansion and contraction of the heat exchange tube has the degree of freedom of expansion and contraction in the heat storage medium container, is not restricted by the heat storage medium container, and the heat exchange The inlet and outlet of the tube can be welded and sealed with the heat storage medium container, and no leakage will occur, so that the heat exchange tube can be set as a horizontal tube, thereby avoiding the liquid phase retention and gas plug problem caused by the downward bending of the heat exchange tube, heat exchange. Media circulation is smoother.

The cylinder of the invention does not form a restriction on the expansion of the heat exchange tube, so that the heat exchange tube does not have to be in the cylinder The body is bent downward, so that the heat exchange tube can be set as a horizontal tube, and the heat transfer tube and the end portion of the barrel do not have a relative displacement, and the sealing can be performed to ensure that the liquid level of the heat storage medium in the cylinder can be over-changed. The heat pipe and the barrel pass through the point without leaking, avoiding the liquid phase retention and gas plug problem caused by the heat transfer tube being bent downward and immersed in the heat storage medium, and the heat exchange medium is more smoothly circulated; The heat exchange tube arranged has high heat exchange efficiency; the support plate after splitting is used to form support for the heat exchange branch pipe, which simplifies the assembly process and ensures the overall working stability of the heat storage device.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the internal structure of a first embodiment of the present invention.

Figure 2 is a schematic plan view of the top view of Figure 1 of the present invention.

3 is a schematic view showing the positional structure of a support plate according to a first embodiment of the present invention.

Fig. 4 is a front elevational view showing the cutting of the support plate according to the first embodiment of the present invention. Figure 5 is a schematic view showing the structure of the header of the present invention.

Fig. 6 is a schematic view showing another structure of the header of the present invention.

Fig. 7 is a schematic view showing the internal structure of a second embodiment of the present invention.

Figure 8 is a schematic plan view of the plan view of Figure 7 of the present invention.

Fig. 9 is a schematic view showing the positional structure of a support plate according to a second embodiment of the present invention.

Figure 10 is a front elevational view showing the cutting of the support plate of the second embodiment of the present invention. In the figure: 1 heat exchange main pipe, 2 tube plate, 3 header, 4 heat exchange branch, 5 - support plate, 6 cylinder, 7 liner, 8 - expansion joint, 9 bearing, 10 tube hole, 11 A support strip, 12-separator.

Best way to implement the invention The invention will now be further described by way of specific embodiments and the accompanying drawings.

Embodiment 1 : A straight tube cylindrical gradient heat accumulator is shown in Fig. 1, Fig. 2, Fig. 5. The device comprises a horizontal cylindrical cylinder 6, the cylinder is divided into two sections, the middle is abutted by an expansion joint 8, the expansion joint is provided with a lining 7, and one end of the lining 7 is welded to the cylinder of the expansion joint side. On the inner side, the other end is movably inserted into the inner side of the cylinder on the other side of the expansion joint, and the support 9 is respectively disposed below the two cylinders. The end of the cylinder is sealed with a tube sheet 2. The cylinder 6 is filled with a heat storage medium, and the heat exchange tube passes through the cylinder and passes through the heat storage medium in the cylinder. Each heat exchange tube comprises a heat exchange main pipe 1 passing through the tube sheet 2 and sealingly welded to the tube sheet, a plurality of heat exchange branch tubes 4 located in the cylinder body, and a heat transfer main pipe 1 and a heat exchange branch pipe 4 passing through the header box 3 According to the split flow, the central axes of the heat exchange main pipe 1, the header 3 and the heat exchange branch pipe 4 of the same heat exchange tube are located at the same horizontal plane. A plurality of heat exchange tubes are arranged from the top to the bottom in the cylinder body. As shown in Fig. 5, the headers 3 of the heat exchange tubes are aligned in a vertical line. The header structure can also be as shown in FIG. 6. The height of the header 3 is greater than the heights of the heat exchange tube 1 and the heat exchange branch 4, and the headers 3 of the adjacent heat exchange tubes are staggered in the horizontal direction and overlap each other in the vertical direction. Combined, the heat exchange tubes are arranged more closely.

As shown in Fig. 1, 2, and 3, the heat exchange branch pipe 4 is sleeved with spiral fins, and the support plate 5 supporting the heat exchange branch pipe 4 is disposed at a certain distance. The spiral fins at the junction of the heat exchange branch pipe and the support plate have Intermittent.

The structure of the support plate 5 is as shown in FIG. 4, the support plate is a circular steel plate with an outer diameter slightly smaller than the inner diameter of the cylinder body and the lining plate, and the support plate 5 is provided with a plurality of rows of pipe holes 10, and the center line of each row of the pipe holes is at the same horizontal plane. The support plate line is cut into a plurality of support strips 11 along the center line of each row of tube holes, and the support strips are alternately stacked with the heat exchange branch tubes of the heat exchange tubes, and the adjacent support strips are spot welded. Fixed to re-form the integral support plate. Under the support of the support plate, the heat exchange branches of the plurality of heat exchange tubes form a tube bundle in the form of a matrix to improve heat exchange efficiency.

The manufacturing process of this device is as follows:

a. The cylinders are respectively divided into two sections, one of the inner side walls is welded with the liner, the liner is inserted into the other cylinder, and the two cylinders are fixedly connected by the expansion joint;

b. Making a plurality of heat exchange tubes, each of which is made as follows: The plurality of heat exchange branches are arranged in the same horizontal direction, and the two ends of each heat exchange branch are respectively welded on the two headers, and the other side of the header is welded and exchanged The main pipe, the heat-conducting branch pipe is sheathed with spiral fins, and the spiral fins are intermittently arranged at intervals to be installed with the support plate;

c. Select a circular steel plate with an outer diameter slightly smaller than the inner diameter of the cylinder and passing through the lining plate as a support plate, and a plurality of rows of pipe holes are punched in the middle of the support plate, and the hole diameter of the pipe is matched with the heat exchange branch pipe, and each row of pipes The hole spacing is consistent with the heat exchange branch of each heat exchange tube, and each row of tube holes is located at the same horizontal line;

g. Fasten the tube sheets at both ends of the cylinder so that the heat exchange tubes pass through the tube sheets and are sealed with the tube sheets. Pick up.

Example 2: A U-tube cylindrical gradient heat accumulator, as shown in Fig. 7, Fig. 8, and Fig. 5. The device comprises a heat storage medium container, wherein the heat storage medium container is a horizontal cylindrical cylinder 6 , and the cylinder body 6 is a tube plate 2 at one end, and the other side is closed, and the lower sides of the barrel are respectively provided respectively Support 9. The end of the barrel is sealed at the junction with the tube sheet 2. The cylinder 6 is filled with a heat storage medium, and the heat exchange tube has a U-shaped heat exchange medium extending from one end of the cylinder into the cylinder body, and both ends of the heat exchange tube are pierced from the tube sheet at one end of the cylinder body. Each heat exchange tube comprises a heat exchange main pipe passing through the tube plate 2 and sealingly welded to the tube plate, and a plurality of U-shaped heat exchange branch pipes 4 located in the cylinder body, and the heat exchange branch pipe 4 is respectively connected with the heat exchange main pipe 1 The shunt is transferred through the header 3, and the central axes of the heat exchange main pipe 1, the header 3 and the heat exchange branch pipe 4 of the same heat exchange tube are located at the same horizontal plane. A plurality of heat exchange tubes are arranged from the top to the bottom in the cylinder body. As shown in Fig. 5, the headers 3 of the respective heat exchange tubes are aligned with each other in a vertical line. The header structure can also be as shown in FIG. 6. The height of the header 3 is greater than the heights of the heat exchange tube 1 and the heat exchange branch 4, and the headers 3 of the adjacent heat exchange tubes are staggered in the horizontal direction and overlap each other in the vertical direction. Combined, the heat exchange tubes are arranged more closely. The longitudinal center of the cylinder is provided with a vertical partition 12, and the partition is inserted between the two straight sections of the U-row heat exchange tube, and the two heat exchange main tubes, the two header boxes and the two heat exchange branch pipes in the cylinder body are straight. Divided into two parts.

As shown in Figures 7, 8, and 9, the U-shaped heat exchange branch pipe 4 is sleeved with spiral fins on two straight sections, and a support plate 5 supporting the heat exchange branch pipe 4 is disposed at a distance, the heat exchange branch pipe and the support The spiral fins at the plate joint have a discontinuity.

The structure of the support plate 5 is as shown in FIG. 10, and the support plate is matched with the outer diameter and the cylinder body. The support plate 5 is provided with a plurality of rows of pipe holes 10, and the center line of each row of pipe holes is at the same horizontal plane. The tube holes are symmetrically arranged on the left and right sides of the support plate. The support plate is divided into left and right portions along the vertical center line, and the support plate line is cut into a plurality of support bars along the horizontal center line of each row of tube holes

11、 The left and right support bars are respectively matched with the two straight sections of the u-shaped heat exchange branch pipe. The support strips and the heat exchange branches of the heat exchange tubes are alternately stacked and assembled, and the adjacent support strips are spot-welded and fixed to form the whole left and right support plates, and are welded and fixed to the two sides of the partition. Under the support of the support plate, the heat exchange branches of the plurality of heat exchange tubes form a tube bundle in the form of a matrix, and in the synergy of the partition plate and the support plate, the cylinder body is divided into heat exchangers distributed along the flow direction of the heat exchange medium of the heat exchange tube. The chamber forms a plurality of heat storage spaces having a temperature gradient to improve heat exchange efficiency.

The manufacturing process of this device is as follows:

a, making a heat storage medium container, making a housing that is open on one side, and a tube sheet that matches the open side;

c. Select a steel plate with a size slightly smaller than the cross-sectional dimension of the heat storage medium container as a support plate, and a plurality of rows of pipe holes are punched in the middle of the support plate, and the hole diameter of the pipe hole is matched with the gap of the heat exchange branch pipe, and each pipe hole is divided into two parts, Corresponding to and maintaining the same interval with the straight sections on both sides of the plurality of U-shaped heat exchange branches, each row of holes is located at the same horizontal line;

d. Cut the support plate into two parts on the left and right along the vertical center line of the support plate, and cut the horizontal line along the horizontal line of each row of the support plate to cut each support plate into a plurality of support bars, so that The adjacent side faces of the upper and lower adjacent support bars respectively have corresponding half pipe holes; e. selecting a partition plate which is highly adapted to the longitudinal center plane of the heat storage medium container, and inserting between the two straight line segments of the U heat exchange branch pipe;

Claims

Rights request

A cylindrical gradient heat accumulator comprising a heat storage medium container and a heat exchange tube passing through the heat storage medium container, wherein the heat exchange medium flows through the heat exchange medium, wherein: the heat storage medium container is horizontal a cylindrical tube body, a tube plate is respectively arranged at two ends of the cylinder body, the heat exchange tube passes through the tube plate and is welded and sealed with the tube plate, and an expansion joint of the length of the cylinder is adaptively adjusted on the circumference of the barrel body, The heat exchange tube comprises a heat exchange manifold welded to the tube sheet and a heat exchange branch tube disposed in the cylinder body, and one heat exchange manifold corresponds to a plurality of heat exchange branch tubes, and the heat exchange main tube and the corresponding plurality of heat exchange branch tubes are connected and connected through the header box The cylinder body is further provided with a support plate supporting the heat exchange branch pipe, the outer edge of the support plate is matched with the inner surface of the cylinder body, and the support plate is provided with a plurality of rows of pipe holes, and each pipe hole of each row is at the same level, each of which is changed The hot leg passes through the corresponding tube hole on the support plate.

The cylindrical gradient heat accumulator according to claim 2, wherein a plurality of heat exchange tubes which are independent of each other and which are not connected to each other are arranged in the cylinder body from top to bottom.

The cylindrical gradient heat accumulator according to claim 3, wherein: the height of the header is greater than the height of the heat exchange manifold and the heat exchange branch, and the header of the upper and lower adjacent heat exchange tubes is along the direction of the cylinder Staggered from each other.

The cylindrical gradient heat accumulator according to claim 1 or 2 or 3, characterized in that: the heat exchange branches of the same heat exchange tube are arranged on the same horizontal plane.

The cylindrical gradient heat accumulator according to claim 1, wherein: the support plate is cut along a central height line of each row of tube holes to form a plurality of support strips, and the support strips and the heat exchange branch tubes are sequentially stacked. After assembly, the upper and lower support bars are spot welded and fixed.

The cylindrical gradient heat accumulator according to claim 1, wherein: the heat exchange branch tube is welded with a spiral fin to form a fin tube, and the spiral fin is in a heat exchange branch tube and a support plate. The connection location is left with an interval for installation.

The cylindrical gradient heat accumulator according to claim 1 or 2 or 3, wherein: the inner side of the cylinder at the expansion joint position is provided with an annular lining, and the lining plate is provided along the direction of the cylinder The slit is welded and fixed at one end of the liner to the inner wall of the cylinder on one side of the expansion joint, and the other end of the liner is slidably engaged with the inner wall of the cylinder on the other side of the expansion joint.

A method of manufacturing a cylindrical gradient heat accumulator according to any one of claims 1 to 7, characterized in that it comprises the following steps:

d. Performing a line cutting along the center line of each row of the support holes of the support plate, each support plate is cut into a plurality of support strips, so that the adjacent side faces of the upper and lower adjacent support bars respectively have corresponding half pipe holes; e, the lowermost The heat exchange branch pipe of the side heat exchange tube is clamped into the half pipe hole of the lowermost support bar, and then the lower support bar is fastened to the lowermost support bar for spot welding, and the support bars are alternately stacked in this order. Heat exchange tube, heat exchange branch tube bundle formed with support plate support, stack Keeping the heat exchange tube headers adjacent to each other alternately when placed;

A cylindrical gradient heat accumulator comprising a heat storage medium container and a heat exchange tube passing through the heat storage medium container, wherein the heat exchange medium flows through the heat exchange medium, wherein: the heat storage medium container is one side The tube plate and the sealed shells of the remaining sides are closed, the heat exchange tube is a U-shaped tube, and the bent portion is located in the heat storage medium container, and both ends of the heat exchange tube are pierced from the tube sheet and welded and sealed with the tube sheet Fixed, the two ends of the heat exchange tube are heat exchange tubes welded to the tube sheet, the middle part is a plurality of U-shaped heat exchange branch tubes disposed in the heat storage medium container, and one heat exchange manifold corresponds to a plurality of heat exchange branch tubes, The heat main pipe and the corresponding plurality of heat exchange branch pipes are connected and connected by a header, and the heat storage medium container is arranged with a plurality of heat exchange tubes which are independent from each other and are not connected to each other from the top to the bottom, and the heat storage medium container is further The utility model is provided with a support plate supporting the heat exchange branch pipe, the outer edge of the support plate is matched with the inner surface of the heat storage medium container, and the support plate is provided with a plurality of rows of pipe holes, and each pipe hole of each row is located at the same level, and each heat exchange branch pipe Passing through a corresponding tube hole on the support plate, A vertical and vertical partition is arranged between the two straight sections of the heat storage medium container and the u-shaped heat exchange tube.

The cylindrical gradient heat accumulator according to claim 9, wherein: the heat exchange branch pipes of the same heat exchange tube are arranged on the same horizontal surface, and the bending radius of the heat exchange branch pipe arranged from the outside to the inside is gradually formed. Reduced.

The cylindrical gradient heat accumulator according to claim 9, wherein: the height of the header is greater than the height of the heat exchange manifold and the heat exchange branch, and the header of the upper and lower adjacent heat exchange tubes They are staggered along the direction of heat transfer tube transportation.

The cylindrical gradient heat accumulator according to claim 9, wherein: the support plate is cut along a central height line of each row of tube holes to form a plurality of support strips, and the support strips and the heat exchange branch tubes are sequentially stacked. After assembly, the upper and lower support bars are spot welded and fixed.

The cylindrical gradient heat accumulator according to claim 9, wherein: the straight section of the heat exchange branch pipe is welded with a spiral fin to form a finned tube, and the spiral fin is connected to the support plate at the heat exchange branch pipe The location is left with an interval for installation.

The cylindrical gradient heat accumulator according to claim 9, wherein: the partition plate divides each of the support plates into left and right portions, and the two portions of the support plates are welded and fixed to the partition plate.

A method of manufacturing a cylindrical gradient heat accumulator according to any one of claims 9 to 14, characterized in that it comprises the following steps:

c. Select a steel plate with a size slightly smaller than the cross-sectional dimension of the heat storage medium container as a support plate, and a plurality of rows of pipe holes are punched in the middle of the support plate, and the hole diameter of the pipe hole is matched with the gap of the heat exchange branch pipe, and each pipe hole is divided into two parts, Straight line pairs on both sides of a plurality of U-shaped heat exchange branches Should be consistent and consistent, each row of holes is at the same horizontal line;