Overall filling structure and mounting method of boiler heat exchanger

Abstract

The invention discloses an integral filling structure of a boiler heat exchanger and a mounting method, the integral filling structure comprises two groups of upper hoisting dies, a heat exchanger body and connecting assemblies, the upper hoisting dies are connected and fixed in parallel, the top of the heat exchanger body is provided with a plurality of groups of body hoisting beams, and two ends of the upper part of each group of upper hoisting dies are provided with two groups of connecting assemblies; the two sets of connecting assemblies are movably installed along the two ends of the upper portions of the corresponding upper lifting dies correspondingly, each connecting assembly comprises a movable base, a clamping plate, a driving air cylinder and a driving wheel, the clamping plates are fixedly arranged in the two ends of the body lifting beam in a penetrating and inserting mode, and at least three sets of electric lifting hangers are symmetrically installed between the two sets of upper lifting dies; the tops of the heat exchange pipes are fixedly connected with the lower portion of the body hanging beam through an electric lifting hanging frame. The heat exchanger has the advantages that the heat exchange tube can be quickly mounted, and the heat exchanger is quicker and more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler heat exchangers, and particularly relates to an integral filling structure and installation method of a boiler heat exchanger. Background Art

[0002] With the development of industry, boilers, as important heat energy equipment, are widely used in fields such as electric power, chemical industry, and metallurgy. During the operation of a boiler, flue gas is high-temperature waste gas generated by fuel combustion and usually has relatively high waste heat. If not recovered, this part of the waste heat will be discharged with the flue gas, causing a large amount of energy loss. Therefore, how to effectively recover the waste heat in the flue gas and reduce the heat loss of the boiler has become the key to improving the overall energy efficiency of the boiler and reducing energy consumption.

[0003] The installation of existing boiler heat exchangers is rather troublesome, and pre-welding lifting points are also required for hoisting installation. The subsequent hoisting installation of heat exchange tubes is also time-consuming and laborious. Summary of the Invention

[0004] The purpose of the present invention is to provide an integral filling structure and installation method of a boiler heat exchanger, which can realize the rapid installation of heat exchange tubes and is more convenient and faster.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions: An integral filling structure of a boiler heat exchanger, characterized in that it includes an upper lifting mold, a heat exchanger body, and a connection component. There are two groups of the upper lifting molds, which are connected and fixed in parallel. Multiple groups of body lifting beams are arranged at the top of the heat exchanger body. Two groups of connection components are arranged at both upper ends of each group of upper lifting molds. The two groups of connection components are respectively movably installed along both upper ends of the corresponding upper lifting mold. The connection component includes a movable seat, a clamping plate, a driving cylinder, and a driving wheel. At least four groups of driving wheels are rotatably arranged in an array at the bottom of the movable seat. The driving wheels are driven by a motor. The movable seat moves on the upper part of the upper lifting mold through the driving wheels. An opening groove is arranged at the bottom of the upper lifting mold. The driving cylinder is vertically installed in the movable seat. The output end of the driving cylinder respectively penetrates the bottom of the movable seat and the opening groove and is connected to the clamping plate below the upper lifting mold. The clamping plate is horizontally arranged. Horizontal opening grooves are arranged at both ends of the two groups of body lifting beams. The clamping plate is inserted and fixed inside both ends of the body lifting beam. At least three electric lifting hanging brackets are symmetrically installed between the two groups of upper lifting molds. Multiple groups of heat exchange tubes are also arranged inside the heat exchanger body. The tops of the multiple groups of heat exchange tubes are connected and fixed to the lower part of the body lifting beam through the electric lifting hanging brackets.

[0006] Preferably, two groups of guide rods are vertically installed on both sides of the output end of the driving cylinder at the bottom of the movable seat. The two groups of guide rods penetrate downward through the clamping plate, and limit blocks are arranged at the ends of the two groups of guide rods below the clamping plate.

[0007] Preferably, the cross-section of the clamping plate is an inverted U-shaped structure. The top of the inner end of the clamping plate abuts against the horizontal slot in the main body suspension beam. A buffer cushion layer is laid on the top of the outer end of the clamping plate, and the thickness of the buffer cushion layer is greater than the thickness of the top layer of the main body suspension beam.

[0008] Preferably, tapping holes are also provided at both ends below the clamping plate, and adjusting bolts are arranged in the tapping holes to abut against and limit the inner side of the main body suspension beam.

[0009] Preferably, the electric lifting hanging rack includes a mounting seat, a screw rod, and a lifting cylinder. The mounting seat is arranged perpendicular to the two groups of upper lifting molds. The two ends of the mounting seat move along the direction of the upper lifting molds. An installation slot is provided at the bottom of the mounting seat, and a group of screw rods are horizontally rotatably installed in the installation slot. A movable block is connected to the screw rod through thread transmission. One end of the screw rod is connected through an output motor for transmission, and the lower part of the movable block is fixedly connected to the lifting cylinder.

[0010] Preferably, at least two hanging holes are provided below the two groups of lifting cylinders, and heat exchange tubes are inserted and placed in the hanging holes.

[0011] Preferably, a traveling wheel is rotatably arranged at both ends of the mounting seat, and the traveling wheel travels within the two groups of upper lifting molds. A driving motor is arranged in the mounting seat and is in transmission connection with the traveling wheel.

[0012] Preferably, a fence is provided around the upper part of the upper lifting mold on the outer side of the movable seat. A connecting bolt is also provided between the clamping plate and the upper lifting mold for fixation. A fixing gasket is provided on the upper lifting mold on the slot, and the connecting bolt is thread-fixed with the fixing gasket.

[0013] An installation method for the overall filling structure of a boiler heat exchanger is characterized in that specifically: The H-shaped steel at the bottom of the heat exchanger body is rigidly backed by matching screw connection with the vertical H-shaped steel. The multiple groups of main body suspension beams are separated and removed from the top of the heat exchanger body. The multiple groups of main body suspension beams are lifted by the upper lifting mold. First, drive the movable seat on the upper lifting mold to move and expand towards both ends, and lower the driving cylinder. When the horizontal position of the top of the clamping plate is lower than the horizontal slots at both ends of the main body suspension beam, synchronously drive the movable seat to move inward, insert the clamping plate into the horizontal slots at both ends of the main body suspension beam, fix the clamping plate and the upper lifting mold by thread-fixing the connecting bolt and the fixing gasket. Then, drive the driving cylinder to rise. After the lifting of the main body suspension beam is completed, lower the electric lifting hanging rack between the upper lifting molds to clamp the heat exchange tubes. Adjust the left and right welding positions of the heat exchange tubes by horizontally moving the movable block along the screw rod. Then, lift the heat exchange tubes to the corresponding welding positions below the main body suspension beam, and sequentially weld and fix the corresponding heat exchange tubes below the main body suspension beam. The upper lifting mold lifts the main body suspension beam with the heat exchange tubes welded to the position directly above the heat exchanger body and lowers it, and then installs the main body suspension beam and the heat exchanger body.

[0014] In summary, the present invention has the following beneficial effects: In the present invention, the upper lifting die driving connection component is directly connected to the main body lifting beam, and the lifting and installation of the heat exchanger can be realized without additional welding of lifting points.

[0015] In the present invention, the heat exchange tubes are first welded and fixed to the main body lifting beam, and then the main body lifting beam is welded and fixed to the heat exchanger main body, avoiding the problem of lifting the heat exchange tubes after the overall installation of the main body lifting beam and the heat exchanger main body, and the installation is more convenient and fast.

[0016] In the present invention, the electric lifting hanging rack is arranged to be lifted along the side direction and the vertical height of the heat exchanger main body, so as to realize the grasping and positioning installation of the heat exchange tubes, and the installation is more convenient and fast.

[0017] In the present invention, a rigid backing is screwed and matched between the H-shaped steel at the bottom of the heat exchanger main body and the vertical H-shaped steel, ensuring that the heat exchanger main body will not be deformed and distorted after the main body lifting beam is disassembled, and ensuring the integrity of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view of the internal structure of the heat exchanger main body of the present invention; Figure 2 is the side view of the internal structure of the heat exchanger main body of the present invention; Figure 3 is the schematic diagram of the connection structure between the connection component and the upper lifting die of the present invention; Figure 4 is the schematic diagram of the bolt connection structure between the connection component and the upper lifting die of the present invention; Figure 5 is the schematic diagram of the connection structure between the electric lifting hanging rack and the upper lifting die of the present invention; Figure 6 is the specific structural schematic diagram of the electric lifting hanging rack of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] The following further describes the specific embodiments of the present invention in conjunction with the drawings. This embodiment does not constitute a limitation to the present invention.

[0020] As Figures 1 to 6The overall filling structure of a boiler heat exchanger includes the upper lifting mold 1, the heat exchanger body 2 and the connecting components. There are two sets of the upper lifting molds 1, which are fixedly connected in parallel. There are multiple sets of body lifting beams 3 arranged at the top of the heat exchanger body 2. At both ends of the upper part of each set of the upper lifting molds 1, there are two sets of connecting components. The two sets of connecting components are respectively movably installed along both ends of the upper part of the corresponding upper lifting mold 1. The connecting components include a movable seat 4, a clamping plate 5, a driving cylinder 6 and a driving wheel 7. At least four sets of driving wheels 7 are rotatably arranged in an array at the bottom of the movable seat 4. The driving wheels 7 are driven by a motor. The movable seat 4 moves on the upper part of the upper lifting mold 1 through the driving wheels 7. There is a slot 8 arranged at the bottom of the upper lifting mold 1. The driving cylinder 6 is vertically installed in the movable seat 4. The output end of the driving cylinder 6 respectively penetrates through the bottom of the movable seat 4 and the slot 8 and is connected to the clamping plate 5 below the upper lifting mold 1. The clamping plate 5 is horizontally arranged. Horizontal slots are arranged at both ends of multiple sets of body lifting beams 3. The clamping plate 5 is inserted and fixed inside both ends of the body lifting beam 3. At least three electric lifting hanging frames are symmetrically installed between the two sets of the upper lifting molds 1. Multiple heat exchange tubes 9 are also arranged inside the heat exchanger body 2. The tops of the multiple heat exchange tubes 9 are connected and fixed to the lower part of the body lifting beam 3 through the electric lifting hanging frames.

[0021] On both sides of the output end of the driving cylinder 6, two guiding rods 10 are vertically installed at the bottom of the movable seat 4. The two guiding rods 10 penetrate downward through the clamping plate 5. Limit blocks 11 are arranged at the ends of the two guiding rods 10 below the clamping plate 5 to realize the stable up and down movement of the clamping plate 5.

[0022] The cross-section of the clamping plate 5 is an inverted U-shaped structure. The top of the inner end of the clamping plate 5 abuts against the horizontal slot inside the body lifting beam 3. A buffer cushion layer 12 is laid on the top of the outer end of the clamping plate 5. The thickness of the buffer cushion layer 12 is greater than the top layer thickness of the body lifting beam 3.

[0023] Tapping holes 13 are also opened at both ends below the clamping plate 5. An adjusting bolt 14 is arranged in the tapping holes 13 and abuts against the inner side of the body lifting beam 3 for limit, so as to realize the left and right limit of the clamping plate 5 and the body lifting beam 3.

[0024] The electric lifting hanging frame includes a mounting seat 15, a screw rod 16 and a lifting cylinder 17. The mounting seat 15 is arranged perpendicular to the two sets of the upper lifting molds 1. Both ends of the mounting seat 15 move along the setting direction of the upper lifting mold 1. An installation slot 18 is opened at the bottom of the mounting seat 15. A screw rod 16 is horizontally rotatably installed in the installation slot 18. A movable block 19 is connected to the screw rod 16 through thread transmission. One end of the screw rod 16 is connected to an output motor through transmission. The lower part of the movable block 19 is fixedly connected to the lifting cylinder 17.

[0025] At least two hanging holes 20 are arranged below the two lifting cylinders 17. The heat exchange tubes 9 are inserted and placed in the hanging holes 20.

[0026] Both ends of the mounting base 15 are rotatably provided with a traveling wheel 21. The traveling wheel 21 travels within the two sets of upper lifting molds 1. A driving motor is arranged inside the mounting base 15 and is in transmission connection with the traveling wheel 21.

[0027] Around the upper part of the upper lifting mold 1, a fence 22 is provided on the outside of the movable seat 4 to prevent the movable seat 4 from falling and causing accidents.

[0028] Around the upper part of the upper lifting mold 1, a fence 22 is provided on the outside of the movable seat 4. A connecting bolt 23 is also provided between the clamping plate 5 and the upper lifting mold 1 for fixation. A fixing gasket 24 is provided on the upper lifting mold 1 at the slotted opening 8, and the connecting bolt 23 is threadedly fixed to the fixing gasket 24.

[0029] An installation method for the integral filling structure of a boiler heat exchanger is specifically as follows: The H-shaped steel at the bottom of the heat exchanger body is screwed with a rigid backing against the vertical H-shaped steel in a matching manner. The multiple sets of body lifting beams are separated and removed from the top of the heat exchanger body. The multiple sets of body lifting beams are lifted by the upper lifting mold. First, drive the movable seat on the upper lifting mold to move and expand towards both ends, and lower the driving cylinder. When the horizontal position of the top of the clamping plate is lower than the horizontal slotted openings at both ends of the body lifting beam, synchronously drive the movable seat to move inwards, insert the clamping plate into the horizontal slotted openings at both ends of the body lifting beam, and then drive the driving cylinder to rise. After the body lifting beam is lifted, the heat exchange tubes are clamped by lowering the electric lifting hanging bracket between the upper lifting molds. The left and right welding positions of the heat exchange tubes are adjusted by the horizontal movement of the movable block along the screw, and then the heat exchange tubes are lifted to the corresponding welding positions below the body lifting beam. The corresponding heat exchange tubes are sequentially welded and fixed below the body lifting beam. The upper lifting mold lifts the body lifting beam with the heat exchange tubes welded to the position directly above the heat exchanger body and then lowers it, and then installs the body lifting beam on the heat exchanger body.

[0030] In the present invention, the driving connection assembly of the upper lifting mold is directly connected to the body lifting beam, and the lifting and installation of the heat exchanger can be realized without additional welding of lifting points.

[0031] In the present invention, the heat exchange tubes are first welded and fixed to the body lifting beam, and then the body lifting beam is welded and fixed to the heat exchanger body, avoiding the hoisting problem of the heat exchange tubes after the overall installation of the body lifting beam and the heat exchanger body, and the installation is more convenient and fast.

[0032] In the present invention, by setting the electric lifting hanging bracket, it can be lifted and lowered along the direction and vertical height set on the side of the heat exchanger body, so as to realize the grasping and positioning installation of the heat exchange tubes, and the installation is more convenient and fast.

[0033] In the present invention, a rigid backing is screwed with the H-shaped steel at the bottom of the heat exchanger body against the vertical H-shaped steel in a matching manner, ensuring that the heat exchanger body will not be deformed or distorted after the body lifting beam is disassembled, and ensuring the integrity of the overall structure.

[0034] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the technical solution of the present invention.

Claims

1. An integral filling structure of a boiler heat exchanger, characterized in that: It includes an upper lifting mold, a heat exchanger body and a connecting component. The upper lifting mold is provided with two groups, which are connected and fixed in parallel with each other. The top of the heat exchanger body is provided with multiple groups of body hanging beams. Two groups of connecting components are provided at both ends of the upper part of each group of upper lifting molds. The two groups of connecting components are movably installed along the two ends of the upper part of the corresponding upper lifting mold. The connecting component includes a movable seat, a clamping plate, a driving cylinder and a driving wheel. At least four groups of driving wheels are rotatably arranged at the bottom array of the movable seat. The driving wheels are driven by a motor. The movable seat moves on the upper part of the upper lifting mold through the driving wheels. A slot is provided at the bottom of the upper lifting mold, and the driving cylinder is vertically installed in the movable seat. The output end of the driving cylinder respectively passes through the bottom of the movable seat and the connecting splint slotted at the bottom of the upper lifting mold. The splint is horizontally arranged. Both ends of the two groups of the main body hanging beams are provided with horizontal slots. The splint is inserted and fixed inside the two ends of the main body hanging beams. At least three groups of electric lifting brackets are symmetrically installed between the two groups of upper lifting molds. Multiple groups of heat exchange tubes are also arranged in the heat exchanger body, and the tops of the multiple groups of heat exchange tubes are connected and fixed to the bottom of the main body hanging beams through electric lifting brackets.

2. The integral filling structure of a boiler heat exchanger according to claim 1, characterized in that: Two groups of guide rods are vertically installed at the bottom of the movable seat on both sides of the output end of the driving cylinder. The two groups of guide rods penetrate the clamping plate downward, and the ends of the two groups of guide rods below the clamping plate are both provided with limit blocks.

3. The integral filling structure of a boiler heat exchanger according to claim 1, characterized in that: The cross section of the clamping plate is an inverted U-shaped structure, the top of the inner end of the clamping plate is against the horizontal groove in the main body suspension beam, and the top of the outer end of the clamping plate is provided with a buffer layer, the thickness of which is greater than the thickness of the top layer of the main body suspension beam.

4. The integral filling structure of a boiler heat exchanger according to claim 3, characterized in that: The two ends of the lower side of the clamping plate are also provided with tapped holes, and adjusting bolts are arranged in the tapped holes to abut against the inner side of the main body hanging beam for limiting position.

5. The integral filling structure of a boiler heat exchanger according to claim 1, characterized in that: The electric lifting bracket includes a mounting seat, a screw rod and a lifting cylinder. The mounting seat is vertically arranged relative to the two sets of upper lifting molds. The two ends of the mounting seat move along the setting direction of the upper lifting molds. A mounting groove is provided at the bottom of the mounting seat. A group of screw rods are horizontally rotatably installed in the mounting groove. A movable block is connected to the screw rod through a threaded transmission. One end of the screw rod is connected through an output motor transmission. The movable block is fixedly connected to the lifting cylinder at the bottom.

6. The integral filling structure of a boiler heat exchanger according to claim 1, characterized in that: At least two groups of hanging holes are arranged below the two groups of lifting cylinders, and heat exchange tubes are inserted and placed in the hanging holes.

7. The integral filling structure of a boiler heat exchanger according to claim 1, characterized in that: Both ends of the mounting seat are rotatably provided with a running wheel, and the running wheel runs in two sets of upper lifting molds. The mounting seat is provided with a driving motor which is transmission-connected with the running wheel.

8. The integral filling structure of a boiler heat exchanger according to claim 1, characterized in that: A baffle is arranged around the upper part of the upper lifting mold on the outer side of the movable seat, and connecting bolts are arranged between the clamping plate and the upper lifting mold for fixing. A fixing gasket is arranged on the slot of the upper lifting mold, and the connecting bolts are threadedly fixed to the fixing gasket.

9. A method for installing an integral filling structure of a boiler heat exchanger, characterized in that: Specifically: The H steel at the bottom of the heat exchanger body is matched with the vertical H steel to screw the rigid backing, separate and disassemble the multiple sets of body hanging beams from the top of the heat exchanger body, and lift the multiple sets of body hanging beams through the upper lifting mold. First, drive the movable seat on the upper lifting mold to move and unfold at both ends, and lower the driving cylinder. When the horizontal position of the top of the clamp is lower than the horizontal slots at both ends of the body hanging beam, synchronously drive the movable seat to move inward, insert the clamp into the horizontal slots at both ends of the body hanging beam, and fix the clamp to the upper by connecting bolts and fixing gaskets. Lifting mold, then drive the driving cylinder to rise, after completing the lifting of the main body hanging beam, the heat exchange tube is clamped by lowering the electric lifting bracket between the upper lifting mold, and the left and right welding positions of the heat exchange tube are adjusted by the movable block moving horizontally along the screw rod, and then the heat exchange tube is lifted to the corresponding welding position under the main body hanging beam, and the corresponding heat exchange tubes are welded and fixed under the main body hanging beam in turn. The upper lifting mold lifts the main body hanging beam with the completed heat exchange tube welding to the top of the heat exchanger body and then puts it down, and then installs the main body hanging beam and the heat exchanger body.

Images