Air preheater production and assembly device

Abstract

The present invention discloses an air preheater production and assembly device, which is used for installing a plurality of preheating tubes arranged in parallel on a first tube sheet and a second tube sheet, and comprises a support plate and a driving mechanism, wherein the first tube sheet is movably connected to the support plate, the second tube sheet is installed on the support plate, the first tube sheet is fitted to the surface of the second tube sheet, the holes in the first tube sheet and the second tube sheet are aligned with each other, and the driving mechanism is used for driving the first tube sheet to move to a side away from the second tube sheet after the preheating tube passes through the first tube sheet and the second tube sheet; the first tube sheet and the second tube sheet provided by the present invention are initially fitted together with a small spacing, and when a plurality of groups of preheating tubes are installed in the first tube sheet and the second tube sheet, the driving mechanism drives the first tube sheet to move, and the spacing between the first tube sheet and the second tube sheet is gradually enlarged, and under the drive of the driving mechanism, the difficulty of manually installing the preheating tube is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of air preheaters, in particular to an air preheater production and assembly device. Background Art

[0002] Air preheater is a heat exchange device that preheats the air before entering the boiler to a certain temperature through the internal heat sink. It is a device used to improve the heat exchange performance of the boiler and reduce energy consumption. Air preheaters are generally divided into three types: plate type, rotary type and tube type.

[0003] For example, a patent with publication number CN104180388A and publication date December 3, 2014 discloses a novel tubular air preheater, which relates to a preheater, including a left tube sheet and a right tube sheet, wherein the left tube sheet is arranged in parallel with the right tube, and a plurality of heat dissipation units are respectively arranged on the left tube sheet and the right tube sheet, each of the heat dissipation units includes a plurality of pipe openings, and a preheating pipe is respectively inserted into each of the pipe openings, and each of the heat dissipation units on the left tube sheet and the right tube sheet is symmetrically arranged, and the number of the pipe openings of each heat dissipation unit is six, and the center of each of the six pipe openings forms a hexagon.

[0004] During the assembly process of the above-mentioned tubular air preheater, the preheating tube needs to be installed on two sets of tube sheets (i.e., the left tube sheet and the right tube sheet). During the specific installation, the two sets of tube sheets need to be fixed first, and the spacing between the two sets of tube sheets is slightly smaller than the length of the preheating tube. Workers need to make the preheating tube pass through the holes on the two sets of tube sheets and install it on the two sets of tube sheets. Since the length of the preheating tube is long and the spacing between the two sets of tube sheets is long, the manual installation method is not only time-consuming and labor-intensive, but also after the preheating tube passes through the holes on one set of tube sheets, it is difficult to align with the holes on the other set of tube sheets, which increases the difficulty of installing the preheating tube. Summary of the invention

[0005] The object of the present invention is to provide an air preheater production and assembly device to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an air preheater production and assembly device, used to install a plurality of preheating tubes arranged in parallel on a first tube sheet and a second tube sheet, comprising a support plate and a driving mechanism, the first tube sheet is movably connected to the support plate, the second tube sheet is installed on the support plate, the first tube sheet is attached to the surface of the second tube sheet, the holes in the first tube sheet and the second tube sheet are aligned with each other, and the driving mechanism is used to drive the first tube sheet to move to a side away from the second tube sheet after the preheating tube passes through the first tube sheet and the second tube sheet.

[0007] Furthermore, both the first tube sheet and the second tube sheet can be detachably connected to the support plate.

[0008] Furthermore, a clamp for clamping the first tube sheet and the second tube sheet is installed on the support plate.

[0009] Furthermore, a limiting mechanism is installed on the support plate, and the limiting mechanism is used to limit the synchronous movement of the preheating tube and the first tube plate.

[0010] Furthermore, the driving mechanism includes a first driving assembly and a second driving assembly, the first driving assembly is used to drive the first tube sheet to move horizontally, and the second driving assembly is used to drive the limiting mechanism to move horizontally.

[0011] Furthermore, the first drive assembly and the second drive assembly are both screw transmission mechanisms.

[0012] Furthermore, the limiting mechanism comprises a first limiting plate and a second limiting plate, and the first limiting plate and the second limiting plate are respectively located on two sides of the second tube plate.

[0013] Furthermore, the second driving assembly is provided with two groups, which are respectively connected to the first limiting plate and the second limiting plate.

[0014] Furthermore, the driving mechanism also includes two groups of third driving components, and the two groups of third driving components are used to drive the first limiting plate and the second limiting plate to rotate on the supporting plate.

[0015] Furthermore, it also includes a connecting plate, in which the second drive assembly and the third drive assembly are also installed. The first limiting plate includes a first plate portion and a second plate portion, the first plate portion and the second plate portion are mutually clamped, and the first plate portion and the second plate portion correspond to the support plate and the connecting plate respectively.

[0016] The beneficial effect of the present invention is that in the above technical solution, the first tube sheet and the second tube sheet provided by the present invention are initially attached to each other with a small spacing. When multiple groups of preheating tubes are installed in the first tube sheet and the second tube sheet, the driving mechanism drives the first tube sheet to move, and the spacing between the first tube sheet and the second tube sheet is gradually increased. Driven by the driving mechanism, the difficulty of manually installing the preheating tubes is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of a partial cross-sectional view structure provided for an embodiment of the present invention;

[0019] Figure 2A schematic diagram of assembling a preheating tube, a first tube sheet, and a second tube sheet provided in an embodiment of the present invention;

[0020] Figure 3 A side cross-sectional view of a support plate provided by an embodiment of the present invention;

[0021] Figure 4 The embodiment of the present invention provides Figure 1 Enlarged view of point A in the middle;

[0022] Figure 5 The embodiment of the present invention provides Figure 1 Enlarged view of point B in the middle.

[0023] Description of reference numerals:

[0024] 1. Preheating tube; 2. First tube sheet; 3. Second tube sheet; 4. Support plate; 41. Slide groove; 42. Wedge block; 5. Driving mechanism; 51. First driving assembly; 52. Second driving assembly; 53. Third driving assembly; 54. Clamp; 6. Limiting mechanism; 61. First limiting plate; 611. First plate portion; 612. Second plate portion; 613. Arc-shaped clamping block; 614. Arc-shaped clamping groove; 615. Protrusion; 62. Second limiting plate; 7. Connecting plate. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1-Figure 5As shown, an air preheater production and assembly device provided by an embodiment of the present invention is used to install a plurality of preheating tubes 1 arranged in parallel on a first tube sheet 2 and a second tube sheet 3, including a support plate 4 and a driving mechanism 5, the first tube sheet 2 is movably connected to the support plate 4, the second tube sheet 3 is installed on the support plate 4, the first tube sheet 2 is attached to the surface of the second tube sheet 3, the holes in the first tube sheet 2 and the second tube sheet 3 are aligned with each other, and the driving mechanism 5 is used to drive the first tube sheet 2 to move to a side away from the second tube sheet 3 after the preheating tube 1 passes through the first tube sheet 2 and the second tube sheet 3.

[0028] Specifically, the first tube sheet 2 and the second tube sheet 3 are both vertically installed on the support plate 4. The first tube sheet 2 is movably connected to the support plate 4 so as to be able to reciprocate in a straight line, that is, the first tube sheet 2 is connected to the driving mechanism 5. The driving mechanism 5 can be a linear driving mechanism 5 such as a cylinder or a hydraulic cylinder. This is a prior art and will not be described in detail. In this embodiment, in the initial state, the distance between the first tube sheet 2 and the second tube sheet 3 is small, or the first tube sheet 2 is attached to the surface of the second tube sheet 3. The purposes of the above two methods are the same, both of which are to shorten the distance between the first tube sheet 2 and the second tube sheet 3 so that the distance is much smaller than the length of the preheating tube 1. Because the distance between the first tube sheet 2 and the second tube sheet 3 is reduced, one end of the preheating tube 1 can be more simply and smoothly extended from the hole of the first tube sheet 2 to the hole of the second tube sheet 3, thereby reducing the difficulty of installing the preheating tube 1. After repeating the above installation process for many times to install the preheating tube 1 After the tube 1 is installed, one end of the plurality of preheating tubes 1 is located on the first tube sheet 2 and the second tube sheet 3. At this time, the first tube sheet 2 and the second tube sheet 3 reach a first state, which is the state in which the preheating tube 1 is initially installed on the first tube sheet 2 and the second tube sheet 3. Subsequently, the driving mechanism 5 drives the first tube sheet 2 to move to the side away from the second tube sheet 3, and the spacing between the first tube sheet 2 and the second tube sheet 3 is gradually widened. After the first tube sheet 2 moves to the other end of the preheating tube 1, the first tube sheet 2 and the second tube sheet 3 reach a second state, and the driving mechanism 5 is temporarily stopped. At this time, the preheating tube 1 is located between the first tube sheet 2 and the second tube sheet 3. In the second state, the two ends of the preheating tube 1 are respectively located in the holes of the first tube sheet 2 and the second tube sheet 3. Since the first tube sheet 2 and the second tube sheet 3 are both made of metal, after the preheating tube 1 is installed, an external welding device is used to weld the two ends of the preheating tube 1 to the first tube sheet 2 and the second tube sheet 3.

[0029] In another embodiment of the present invention, further, both the first tube sheet 2 and the second tube sheet 3 can be detachably connected to the support plate 4 .

[0030] Specifically, in the present embodiment, in order to realize the disassembly of the first tube sheet 2 and the second tube sheet 3 after installation and welding, in the present embodiment, the first tube sheet 2 and the second tube sheet 3 can be detachably connected to the support plate 4, and after the preheating tube 1 is welded, the first tube sheet 2, the second tube sheet 3, and the preheating tube 1 can be removed from the support plate 4 by an external device.

[0031] In an optional embodiment, preferably, a clamp 54 for clamping the first tube sheet 2 and the second tube sheet 3 is installed on the support plate 4 .

[0032] Specifically, two groups of clamps 54 are provided, and the first tube sheet 2 and the second tube sheet 3 are each detachably connected to the support plate 4 through a clamp 54. The clamp 54 is an electric clamp. The clamping and loosening of the plate by the electric clamp is a prior art and will not be described in detail. In this embodiment, since the first tube sheet 2 needs to move on the support plate 4, the first tube sheet 2 is connected to the driving mechanism 5 through the clamp 54. The driving mechanism 5 drives the clamp 54 to move on the support plate 4 and drives the first tube sheet 2 to move synchronously, so as to realize the spacing between the first tube sheet 2 and the second tube sheet 3 is widened.

[0033] In another embodiment of the present invention, further, a limiting mechanism 6 is installed on the support plate 4 , and the limiting mechanism 6 is used to limit the synchronous movement of the preheating tube 1 and the first tube plate 2 .

[0034] Specifically, in the above embodiment, since the number of preheating tubes 1 is large and they have a certain weight, there is a large friction between the preheating tube 1 and the first tube sheet 2, so the movement of the first tube sheet 2 will also drive part of the preheating tubes 1 to move synchronously, thereby causing one end of the preheating tube 1 to be separated from the second tube sheet 3. In order to solve the above technical problems, in this embodiment, a limiting mechanism 6 is also installed on the support plate 4. The limiting mechanism 6 is used to limit the synchronous movement of the preheating tube 1 and the first tube sheet 2. The limiting mechanism 6 can be a baffle arranged on one side of the first tube sheet 2 and the second tube sheet 3. The driving mechanism 5 is provided with two groups, and the other group is connected to the baffle. After the first state is completed, the driving mechanism 5 drives the baffle to move to the end of the preheating tube 1 away from the second tube sheet 3. Under the obstruction of the baffle, the movement of the first tube sheet 2 is prevented from driving the preheating tube 1 to move synchronously, so that the first tube sheet 2 can be smoothly moved to the end of the preheating tube 1 close to the baffle.

[0035] In another embodiment of the present invention, further, the driving mechanism 5 includes a first driving assembly 51 and a second driving assembly 52, the first driving assembly 51 is used to drive the first tube sheet 2 to move horizontally, and the second driving assembly 52 is used to drive the limiting mechanism 6 to move horizontally.

[0036] Specifically, the first drive assembly 51 and the second drive assembly 52 are both screw transmission mechanisms, so the first drive assembly 51 and the second drive assembly 52 both include a screw and a slider, the slider is threadedly connected to the screw to form a ball screw, the two sets of screws in the first drive assembly 51 and the second drive assembly 52 are located on the same straight line, the surface of the support plate 4 is provided with multiple sets of slide grooves 41, the screws are located in the slide grooves 41, the groove direction of the slide grooves 41 is consistent with the length direction of the support plate 4, the bottom of the clamp 54 extends into the slide grooves 41, and forms a ball screw with the screw in the first drive assembly 51, the first drive assembly 51 drives the clamp 54 to slide in one set of slide grooves 41, the second drive assembly 52 drives the baffle to slide in the other slide groove 41, the first tube sheet 2 and the second tube sheet 3 move to the first state, the second drive assembly 52 drives the baffle to move to the end of the preheating tube 1 away from the second tube sheet 3, under the obstruction of the baffle, the first tube sheet 2 is prevented from driving the preheating tube 1 to move synchronously when moving, and the preheating tube 1 is prevented from detaching from the second tube sheet 3.

[0037] In an optional embodiment, preferably, the limiting mechanism 6 includes a first limiting plate 61 and a second limiting plate 62 , and the first limiting plate 61 and the second limiting plate 62 are respectively located on two sides of the second tube sheet 3 .

[0038] Specifically, the first limiting plate 61 is located on the side of the second tube sheet 3 close to the first tube sheet 2, and the second limiting plate 62 is located on the side of the second tube sheet 3 away from the first tube sheet 2. The first limiting plate 61 is the baffle in the above embodiment. When in use, the first limiting plate 61 and the second limiting plate 62 are both arranged vertically on the support plate 4. The second driving assembly 52 is provided with two groups, which are respectively connected to the first limiting plate 61 and the second limiting plate 62. One group of the second driving assemblies 52 drives the second limiting plate 62 to move to one side of the second tube sheet 3 and fits on one side of the second tube sheet 3. At this time, the second limiting plate 62 blocks The second limiting plate 62 blocks the opening of one end of the hole in the second tube sheet 3, thereby preventing the preheating tube 1 from extending directly from the inside of the second tube sheet 3 during installation, so that one end of the preheating tube 1 can be accurately located in the hole in the second tube sheet 3, and at the same time, the other ends of the multiple groups of preheating tubes 1 can be neatly arranged between the first limiting plate 61 and the first tube sheet 2. When the first tube sheet 2 moves to the specified position, the two groups of second driving assemblies 52 respectively drive the first limiting plate 61 and the second limiting plate 62 to reset and break away from the contact with the first tube sheet 2 and the second tube sheet 3, thereby facilitating the welding of the two ends of the preheating tube 1.

[0039] In another embodiment of the present invention, further, the driving mechanism 5 also includes two groups of third driving components 53 , and the two groups of third driving components 53 are used to drive the first limiting plate 61 and the second limiting plate 62 to rotate on the supporting plate 4 .

[0040] Specifically, the bottoms of the first limit plate 61 and the second limit plate 62 are rotatably connected to the sliders in the two groups of second drive components 52, and the two groups of third drive components 53 are respectively installed at the rotation connection between the two groups of sliders and the first limit plate 61 and the first limit plate 61. The third drive component 53 can be a rotating drive mechanism 5 such as a motor and a rotating cylinder. When the third drive component 53 is a motor, the two groups of motors are fixedly installed on the two groups of sliders, and the output shaft of the motor is connected to the bottom of the first limit plate 61 and the second limit plate 62. The motor drives the first limit plate 61 and the second limit plate 62 to rotate at the top of the slider, so in the initial state, That is, before the preheating tube 1 is installed on the first tube sheet 2 and the second tube sheet 3, the first limit plate 61 and the second limit plate 62 are arranged in a horizontal state on the support plate 4 to prevent the first limit plate 61 and the second limit plate 62 from affecting the installation of the preheating tube 1 by the staff. After the preheating tube 1 is installed, that is, the first tube sheet 2, the second tube sheet 3, and the preheating tube 1 reach the first state, the motor drives the first limit plate 61 and the second limit plate 62 to rotate ninety degrees, and the first limit plate 61 and the second limit plate 62 rotate from the horizontal state to the vertical state, and the first limit plate 61 and the second limit plate 62 complete the limitation of the preheating tube 1 in the vertical state.

[0041] In another embodiment of the present invention, further, it also includes a connecting plate 7, in which the second drive assembly 52 and the third drive assembly 53 are also installed, and the first limiting plate 61 includes a first plate portion 611 and a second plate portion 612, and the first plate portion 611 and the second plate portion 612 are mutually clamped, and the first plate portion 611 and the second plate portion 612 correspond to the support plate 4 and the connecting plate 7 respectively.

[0042] Specifically, the first limiting plate 61 and the second limiting plate 62 have the same structure, both including a first plate portion 611 and a second plate portion 612, the connecting plate 7 is connected to the support plate 4 through a column, the connecting plate 7 is located above the support plate 4 and parallel to the support plate 4, and the second driving assembly 52 and the third driving assembly 53 are also installed in the connecting plate 7, the first plate portion 611 is connected to the second driving assembly 52 on the support plate 4, and the second plate portion 612 is connected to the second driving assembly 52 on the connecting plate 7, and the second plate portion 612 can also be connected to the second driving assembly 52 on the second driving assembly 53. The first plate 611 is driven by the third driving assembly 52 to move horizontally on the connecting plate 7, and can also be driven by the third driving assembly 53 to rotate at the bottom of the connecting plate 7. An arc-shaped block 613 is installed on the top of the first plate 611, and an arc-shaped groove 614 is opened at the bottom of the second plate 612. The arc-shaped block 613 and the arc-shaped groove 614 form a limited contact fit. The arc of the arc-shaped block 613 and the arc-shaped groove 614 is the same as the rotation radius of the first plate 611 and the second plate 612. In actual use, after the preheating tube 1 is installed, After the first tube sheet 2, the second tube sheet 3 and the preheating tube 1 have reached the first state, the third driving assembly 53 on the connecting plate 7 first drives the second plate portion 612 to rotate from the horizontal state to the vertical state, and then the third driving assembly 53 on the supporting plate 4 drives the first plate portion 611 to rotate from the horizontal state to the vertical state. During the rotation of the first plate portion 611, the arc-shaped clamping block 613 gradually extends into the arc-shaped clamping groove 614. After the first plate portion 611 rotates to the vertical state, the arc-shaped clamping block 613 completely enters the arc-shaped clamping groove 614. In the groove 614, the first plate portion 611 and the second plate portion 612 form a first limit plate 61, and the second driving components 52 on the support plate 4 and the connecting plate 7 simultaneously drive the first limit plate 61 to move horizontally. When the first limit plate 61 moves and contacts the end of the preheating tube 1 away from the second tube plate 3, the first limit plate 61 at this time has two upper and lower support points, namely, two groups of second driving components 52 on the support plate 4 and the connecting plate 7, so the first limit plate 61 can have a stable supporting force to block the preheating tube 1;

[0043] When the first tube sheet 2 moves, the preheating tube 1 will be driven to move horizontally under the action of friction, and the preheating tube 1 will also apply a certain thrust to the first limit plate 61. Because one end of the first plate portion 611 and the second plate portion 612 are connected to the slider in the third drive assembly 53, the third drive assembly 53 is a motor, and the braking ability provided by the motor to the first plate portion 611 and the second plate portion 612 is limited, that is, when the first plate portion 611 and the second plate portion 612 are subjected to a large thrust, the first plate portion 611 will force the output shaft of the motor to rotate in the opposite direction, which may cause damage to the motor. Because the arc-shaped block 613 and the arc-shaped groove 614 form a limit-interference match, the first plate portion 611 and The rotation of the second plate portion 612 needs to be separated before rotating, and the preheating tube 1 applies a thrust to the first plate portion 611 and the second plate portion 612 at the same time when moving. The direction of the thrust is different from the rotation direction of the first plate portion 611 and the second plate portion 612, so a locking state is formed under the cooperation of the arc block 613 and the arc groove 614. The locking state can only be released by the rotation of the first plate portion 611 and the second plate portion 612, that is, it is rotated open. The first plate portion 611 and the second plate portion 612 will not be forced to rotate due to the thrust applied by the preheating tube 1, and the motor will not be damaged. The structures of the first limit plate 61 and the second limit plate 62 are the same and will not be repeated here.

[0044] It should be supplemented that the first drive assembly 51 and the clamp 54 (not shown) can also be installed on the connecting plate 7, so that the first tube sheet 2 can also have two sets of upper and lower power drives, so that the first tube sheet 2 can move more stably.

[0045] In another embodiment of the present invention, further, the first plate portion 611 and the second plate portion 612 in the first limiting plate 61 are both telescopic structures, and a protrusion 615 is installed on the first plate portion 611 and the second plate portion 612, and a guide slope is provided in the support plate 4, and the protrusion 615 and the guide slope form a sliding guide fit.

[0046] Specifically, in the first state, because one end of the preheating tube 1 is located in the second tube sheet 3 and the other end is suspended, and the aperture of the holes in the first tube sheet 2 and the second tube sheet 3 is larger than the diameter of the preheating tube 1, the suspended end of the preheating tube 1 will drop due to lack of support, resulting in the horizontal height of the suspended end of the preheating tube 1 being slightly lower than the height in the second tube sheet 3, and the preheating tube 1 is tilted. At this time, the first limiting plate 61 and the second limiting plate 62 limit the two ends of the preheating tube 1, which will keep the preheating tube 1 in the tilted state. In the subsequent horizontal movement of the second tube sheet 3, the preheating tube 1 in the tilted state will block the horizontal movement of the second tube sheet 3, causing the preheating tube 1 that is difficult to move on the second tube sheet 3 to be away from the end of the second tube sheet 3;

[0047] In order to solve the above technical problems, in the present embodiment, the first plate portion 611 and the second plate portion 612 are both telescopic structures, that is, a telescopic plate is provided at the connection between the first plate portion 611 and the third driving assembly 53 on the support plate 4, and at the connection between the second plate portion 612 and the third driving assembly 53 on the connecting plate 7. A spring is installed inside the telescopic plate, and the spring is initially in a natural state. The protrusion 615 is installed on the telescopic section of the first plate portion 611 and the second plate portion 612. A wedge block 42 is installed on the inner wall of the slide groove 41. The wedge block 42 has an upwardly inclined guiding inclined surface. After the first plate portion 611 and the second plate portion 612 rotate and form the first limiting plate 61, the second driving assembly 52 drives the first limiting plate 61 to move horizontally in the slide groove 41 on the support plate 4 and the connecting plate 7. A rubber pad is installed on the side of the first plate portion 611 close to the preheating tube 1. The first plate portion 611 and the second plate portion 612 are in contact with the preheating tube 1 through the rubber pad. Under the resistance of the preheating tube 1, the rubber pad The rubber pad is squeezed and deformed. At this time, the protrusion 615 contacts the guiding inclined surface. The protrusion 615 is forced to rise under the drive of the guiding inclined surface. The protrusions 615 in the support plate 4 and the connecting plate 7 rise synchronously. In this state, the protrusion 615 on the first plate portion 611 is located above the upper telescopic plate, so the rise of the first plate portion 611 forces the telescopic plate to stretch. Similarly, the protrusion 615 on the second plate portion 612 is located below the upper telescopic plate, so the rise of the second plate portion 612 forces the telescopic plate to contract. That is, the second plate portion 612 is passively contracted under the drive of the protrusion 615, and the stretching of the first plate portion 611 and the contraction of the second plate portion 612 are the rise of the middle portion of the first limiting plate 61. Since one end of the preheating tube 1 is squeezed in the rubber pad, the rise of the middle portion of the first limiting plate 61 will drive the suspended end of the preheating tube 1 to rise, and the preheating tube 1 is fine-tuned and corrected, so that the preheating tube 1 is adjusted from an inclined state to a horizontal state, so as to prevent the preheating tube 1 in the inclined state from affecting the horizontal movement of the first tube plate 2;

[0048] Secondly, due to the stretching of the first plate portion 611 and the contraction of the second plate portion 612, the arc block 613 and the arc groove also rise accordingly. Since the curvature of the arc block 613 and the arc groove 614 is the same as the rotation radius of the first plate portion 611 and the second plate portion 612, the rise of the two causes the rotation radius of the first plate portion 611 to become longer and the rotation radius of the second plate portion 612 to become smaller. Therefore, during the stretching of the first plate portion 611 and the contraction of the second plate portion 612, the first plate portion 611 and the second plate portion 612 cannot be opened even if they are rotated successively. Therefore, the first plate portion 611 and the second plate portion 612 are not suitable for the curvature of the arc groove 614 and the arc block 613. Therefore, the first plate portion 611 and the second plate portion 612 are converted from the locked state formed after the rotation to the locked state, so that the first limit plate 61 can provide stable support for the preheating tube 1;

[0049] Finally, after the second tube sheet 3 moves to the end of the preheating tube 1 away from the first tube sheet 2, the second driving assembly 52 drives the first limiting plate 61 and the second limiting plate 62 to reset, and the third driving assembly 53 drives the first limiting plate 61 to disintegrate into the first plate portion 611 and the second plate portion 612, and horizontally fit on the support plate 4 and the connecting plate 7.

[0050] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An air preheater production and assembly device, used for installing a plurality of preheating tubes (1) arranged in parallel on a first tube sheet (2) and a second tube sheet (3), characterized in that: The invention comprises a support plate (4) and a driving mechanism (5), wherein a first tube plate (2) is movably connected to the support plate (4), a second tube plate (3) is mounted on the support plate (4), the first tube plate (2) is attached to the surface of the second tube plate (3), holes in the first tube plate (2) and the second tube plate (3) are aligned with each other, the driving mechanism (5) is used to drive the first tube plate (2) to move to a side away from the second tube plate (3) after the preheating tube (1) passes through the first tube plate (2) and the second tube plate (3), a limiting mechanism (6) is also mounted on the support plate (4), the limiting mechanism (6) is used to limit the synchronous movement of the preheating tube (1) and the first tube plate (2), and the driving mechanism (5) comprises a first driving component (51) and a second driving component (52), the first driving component (51) is used to drive the first tube plate (2) to move horizontally, and the second driving component (52) is used to drive the first tube plate (2) to move horizontally. The limiting mechanism (6) moves horizontally. The limiting mechanism (6) comprises a first limiting plate (61) and a second limiting plate (62). The first limiting plate (61) and the second limiting plate (62) are respectively located on two sides of the second tube plate (3). The driving mechanism (5) further comprises two groups of third driving assemblies (53). The two groups of third driving assemblies (53) are used to drive the first limiting plate (61) and the second limiting plate (62) to rotate on the support plate (4). The driving mechanism (5) further comprises a connecting plate (7). The connecting plate (7) also has the second driving assembly (52) and the third driving assembly (53) installed therein. The first limiting plate (61) comprises a first plate portion (611) and a second plate portion (612). The first plate portion (611) and the second plate portion (612) are mutually clamped. The first plate portion (611) and the second plate portion (612) correspond to the support plate (4) and the connecting plate (7) respectively. The first plate portion (611) and the second plate portion (612) in the first limit plate (61) are both telescopic structures, and projections (615) are mounted on the first plate portion (611) and the second plate portion (612). A guide inclined surface is provided in the support plate (4), and the projections (615) and the guide inclined surface form a sliding guide fit; A telescopic plate is provided at the connection between the first plate portion (611) and the third driving assembly (53) on the support plate (4), and at the connection between the second plate portion (612) and the third driving assembly (53) on the connecting plate (7). The surface of the support plate (4) is provided with a plurality of groups of slide grooves (41). The inner wall of the slide groove (41) is provided with a wedge block (42). The wedge block (42) has a guiding inclined surface inclined upward. The first plate portion (611) and the second plate portion (612) rotate and form a After the first limit plate (61) is moved, the second drive assembly (52) drives the first limit plate (61) to move horizontally in the slide grooves (41) on the support plate (4) and the connecting plate (7). A rubber pad is installed on the side of the first plate portion (611) close to the preheating tube (1). The first plate portion (611) and the second plate portion (612) are in contact with the preheating tube (1) through the rubber pad. Under the resistance of the preheating tube (1), the rubber pad is squeezed and deformed. At this time, the protrusion (615) is in contact with the preheating tube (1). The guide inclined surface contacts the first plate portion (611), and the projection (615) is forced to rise under the drive of the guide inclined surface. The projections (615) in the support plate (4) and the connecting plate (7) rise synchronously. In this state, the projection (615) on the first plate portion (611) is located above the telescopic plate, so the rise of the first plate portion (611) forces the telescopic plate to stretch, and the projection (615) on the second plate portion (612) is located below the telescopic plate, so the rise of the second plate portion (612) forces the telescopic plate to contract. , that is, the second plate portion (612) is passively contracted under the drive of the protrusion (615), and the stretching of the first plate portion (611) and the contraction of the second plate portion (612) are the rise of the middle portion of the first limiting plate (61). Since one end of the preheating tube (1) is squeezed in the rubber pad, the rise of the middle portion of the first limiting plate (61) will drive the suspended end of the preheating tube (1) to rise, thereby fine-tuning and correcting the preheating tube (1) so that the preheating tube (1) is adjusted from an inclined state to a horizontal state.

2. The air preheater production and assembly device according to claim 1, characterized in that: Both the first tube sheet (2) and the second tube sheet (3) are detachably connected to the support plate (4).

3. The air preheater production and assembly device according to claim 1, characterized in that: A clamp (54) for clamping the first tube sheet (2) and the second tube sheet (3) is installed on the support plate (4).

4. The air preheater production and assembly device according to claim 1, characterized in that: The first drive assembly (51) and the second drive assembly (52) are both screw transmission mechanisms.

5. The air preheater production and assembly device according to claim 1, characterized in that: The second driving assembly (52) is provided with two groups, which are respectively connected to the first limiting plate (61) and the second limiting plate (62).

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