Installation method of GGH heat exchanger supporting bearing

Abstract

The invention provides an installation method of a GGH heat exchanger supporting bearing, and belongs to the technical field of metallurgical construction.The installation method comprises the steps that a bottom plate is fixed to the position of the supporting bearing of a base, a supporting pad is placed in the center of the bottom plate, then a bearing box is hoisted and placed on the bottom plate, and the center of the bearing box coincides with the supporting pad, so that the position installation precision of the bearing box can be guaranteed; through the structural design of the lug plate, the adjusting nut and the adjusting bolt on the bearing box, the levelness of the bearing box is adjusted by adjusting the extension length of the bottom end of the adjusting bolt, so that the levelness adjustment is easier to operate, and the levelness adjustment efficiency in the bearing mounting process is improved. The problem that the requirement for the adjusting precision of the supporting bearing is high can be effectively solved, the construction efficiency is greatly improved, the construction quality is guaranteed, and safe operation of the supporting bearing is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical construction, and more specifically, to a method for installing a support bearing of a GGH heat exchanger. Background Art

[0002] GGH flue gas heat exchanger is the core equipment of SCR denitrification device, usually composed of supporting bearings, heat exchange elements and heat exchange element boxes, rotors supporting heat exchange elements and rotor casings, end columns, top structures, bottom structures, sealing devices, driving devices and other components.

[0003] The support bearing is installed in the bearing box and sealed by the bearing box cover. It has a complex structure and heavy weight. Due to the heavy pressure and the rotating state, the support bearing has high adjustment requirements. If the traditional method of setting a pad on the base to adjust the bearing box and grouting is adopted, the precision adjustment efficiency of the support bearing is low, and the support bearing is easily offset due to the insufficient precision of the support bearing, thereby affecting the safe operation of the support bearing. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a method for installing a support bearing of a GGH heat exchanger, so as to solve the problem in the prior art that the traditional method of setting a pad on the base to adjust the bearing box and grouting is used, the precision adjustment efficiency of the support bearing is low, and the support bearing is easily offset due to insufficient precision of the support bearing, thereby affecting the safe operation of the support bearing.

[0005] The installation method of the GGH heat exchanger support bearing provided by the present invention comprises the following steps:

[0006] According to the design drawings, the position of the support bearing is located on the base, and a circular bottom plate is fixed at the position of the support bearing;

[0007] Placing a circular support pad at the center of the base plate, and adjusting the level of the support pad to meet the preset support pad level requirement;

[0008] The bearing box is hoisted onto the bottom plate, and the center of the bearing box is made to coincide with the support pad; wherein the bearing box comprises a box body; two lifting ears are symmetrically arranged on the outer wall of the box body, at least four ear plates are fixedly arranged at the lower part of the outer wall of the box body, the ear plates are evenly arranged around the circumference of the box body, an adjusting nut is fixedly arranged at the lower part of the outer side of the ear plate, and an adjusting bolt is vertically passed through the adjusting nut;

[0009] By adjusting the extension length of the bottom end of the adjusting bolt, the horizontality of the bearing box is adjusted so that the bearing box meets the preset bearing box horizontality requirement;

[0010] Lift the bearing and place it in the bearing box, adjust the horizontality of the bearing box in which the bearing is placed by adjusting the protruding length of the bottom end of the adjusting bolt, so that the bearing meets the preset bearing horizontality requirement, and cover the top of the bearing with a bearing cover;

[0011] Filling sealant into the gap between the bottom plate and the support pad, the gap between the bottom plate and the bearing box, and the gap between the support pad and the bearing box;

[0012] After the sealant is completely dry, lubricating oil is injected into the designated position in the bearing box, and a pipe plug of the oil temperature measuring device is installed at the designated position of the bearing box to complete the installation of the support bearing.

[0013] In addition, a preferred solution is that before locating the position of the support bearing on the base according to the design drawing and fixing the circular bottom plate at the position of the support bearing, it also includes:

[0014] The base is inspected for levelness, dimensions and surface cleanliness.

[0015] In addition, a preferred solution is that in the process of positioning the support bearing on the base according to the design drawing and fixing the circular bottom plate at the position of the support bearing,

[0016] The base plate is fixed to the position of the support bearing by welding.

[0017] In addition, a preferred solution is that the support pad is placed at the center of the bottom plate, including:

[0018] Determine the center of the base plate and mark the center of the base plate;

[0019] Place the support pad at the marked location.

[0020] In addition, a preferred solution is that the circumferential gap between the support pad and the base plate is within 2.5 mm.

[0021] In addition, a preferred solution is that the preset support pad horizontality requirement is less than 0.5mm / 1000mm.

[0022] In addition, a preferred solution is that the preset bearing box horizontality requirement is 0.5mm / 1000mm.

[0023] In addition, a preferred solution is that the bearing horizontality requirement is 0.5mm / 1000mm.

[0024] In addition, a preferred solution is that after filling the gap between the bottom plate and the support pad, the gap between the bottom plate and the bearing box, and the gap between the support pad and the bearing box with sealant, the method further comprises:

[0025] Remove the adjusting bolt from the bearing housing.

[0026] In addition, a preferred solution is that, during the process of injecting lubricating oil into the designated position in the bearing box,

[0027] Lubricating oil is injected into the designated position in the bearing box through the oiler and the oil level gauge.

[0028] From the above technical scheme, it can be known that the installation method of the GGH heat exchanger support bearing provided by the present invention is to first fix the base plate at the support bearing position of the base, place the support pad in the center of the base plate, and then hoist the bearing box and place it on the base plate, and by making the center of the bearing box coincide with the support pad, the position installation accuracy of the bearing box can be ensured, and the horizontality of the bearing box can be adjusted by adjusting the extension length of the bottom end of the adjusting bolt through the structural design of the ear plate, the adjusting nut and the adjusting bolt on the bearing box, so that the horizontal accuracy adjustment is easier to operate, and the efficiency of the horizontal accuracy adjustment during the bearing installation process is improved; by filling the gap between the base plate and the support pad, the gap between the base plate and the bearing box, and the gap between the support pad and the bearing box with sealant, the support bearing that meets the accuracy requirements can be fixed on the base. The present invention can effectively solve the problem of high adjustment accuracy requirements for the support bearing, and greatly improves the construction efficiency, and ensures the construction quality, ensuring the safe operation of the support bearing.

[0029] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] By referring to the following description in conjunction with the accompanying drawings, and with a more complete understanding of the present invention, other objects and results of the present invention will become more apparent and easily understood.

[0031] Figure 1 is a flow chart of a method for installing a GGH heat exchanger support bearing according to an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of the installation of a support bearing assembly according to an embodiment of the present invention;

[0033] Figure 3A structural schematic diagram of a support bearing assembly process according to an embodiment of the present invention;

[0034] Figure 4 is a schematic structural diagram of a support bearing assembly according to an embodiment of the present invention;

[0035] Figure 5 A schematic diagram of a lifting device structure used for lifting a bearing according to an embodiment of the present invention;

[0036] Figure 6 A schematic diagram of a bearing hoisting structure according to an embodiment of the present invention;

[0037] Figure 7 It is a cross-sectional schematic diagram of the installation of a support bearing assembly according to an embodiment of the present invention.

[0038] In the accompanying drawings, 1-base, 2-bottom plate, 3-support pad, 4-bearing box, 41-box body, 42-lifting ear, 43-ear plate, 44-adjusting nut, 45-adjusting bolt, 5-bearing, 6-bearing cover, 7-hanging fixture, 71-hanging beam, 72-bracket, 73-fixing pin, 74-lifting ear.

[0039] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0040] In view of the above-mentioned problems, in the prior art, the traditional method of setting a pad on the base to adjust the bearing box and grouting is adopted, which has low efficiency in adjusting the precision of the support bearing and is prone to the problem that the support bearing is offset due to insufficient precision of the support bearing, thereby affecting the safe operation of the support bearing. A method for installing the support bearing of a GGH heat exchanger is proposed.

[0041] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] In order to illustrate the installation method of the GGH heat exchanger support bearing provided by the present invention, Figure 1 The process of the installation method of the GGH heat exchanger support bearing according to the embodiment of the present invention is shown; Figure 2 It shows the support bearing assembly installation according to an embodiment of the present invention; Figure 3 The support bearing assembly process structure according to an embodiment of the present invention is shown; Figure 4 The structure after the support bearing is assembled according to an embodiment of the present invention is shown; Figure 5 The structure of the lifting device used for the bearing lifting according to the embodiment of the present invention is shown; Figure 6 The bearing hoisting structure according to an embodiment of the present invention is shown; Figure 7 The figure shows the support bearing assembly installation cross-sectional structure according to an embodiment of the present invention.

[0043] like Figures 1 to 7 As shown together, the installation method of the GGH heat exchanger support bearing provided by the present invention comprises the following steps:

[0044] Step S1, according to the design drawing, locate the position of the support bearing on the base 1, and fix the circular bottom plate 2 at the position of the support bearing;

[0045] Step S2, placing a circular support pad 3 at the center of the bottom plate 2, and adjusting the levelness of the support pad 3 to meet the preset support pad levelness requirement;

[0046] Step S3, hoist the bearing box 4 onto the bottom plate 1, and make the center of the bearing box 4 coincide with the support pad 3; wherein the bearing box 4 includes a box body 41; two lifting ears 42 are symmetrically arranged on the outer wall of the box body 41, at least four ear plates 43 are fixedly arranged at the lower part of the outer wall of the box body 41, the ear plates 43 are evenly arranged around the circumference of the box body 41, an adjusting nut 44 is fixedly arranged at the lower part of the outer end of the ear plate 43, and an adjusting bolt 45 is vertically penetrated in the adjusting nut 44;

[0047] Step S4, adjusting the horizontality of the bearing box 4 by adjusting the extension length of the bottom end of the adjusting bolt 45, so that the bearing box 4 meets the preset bearing box horizontality requirement;

[0048] Step S5, hoist the bearing 5 and place it in the bearing box 4, adjust the horizontality of the bearing box 4 in which the bearing 5 is placed by adjusting the bottom end extension length of the adjusting bolt 45, so that the bearing 5 meets the preset bearing horizontality requirement, and cover the top of the bearing 5 with a bearing cover 6;

[0049] Step S6, filling sealant into the gap between the bottom plate 2 and the support pad 3, the gap between the bottom plate 2 and the bearing box 4, and the gap between the support pad 3 and the bearing box 4;

[0050] Step S7, after the sealant is completely dry, inject lubricating oil into the designated position in the bearing box 4, and install a pipe plug of the oil temperature measuring device at the designated position of the bearing box 4 to complete the installation of the support bearing.

[0051] It should be noted that: the above steps are used to install a single support bearing. Generally, there are four support bearings. The other three support bearings can be installed using the same steps as above.

[0052] By first fixing the bottom plate 2 at the support bearing position of the base, placing the support pad 3 at the center of the bottom plate 2, and then hoisting the bearing box 4 on the bottom plate 2, and by making the center of the bearing box 4 coincide with the support pad 3, the position installation accuracy of the bearing box 4 can be ensured, and the horizontality of the bearing box 4 can be adjusted by adjusting the bottom extension length of the adjusting bolt 45 through the structural design of the ear plate 43, the adjusting nut 44 and the adjusting bolt 45 on the bearing box 4, so that the horizontal accuracy adjustment is easier to operate, and the efficiency of the horizontal accuracy adjustment during the bearing installation process is improved; by filling the gap between the bottom plate 2 and the support pad 3, the gap between the bottom plate 2 and the bearing box 4, and the gap between the support pad 3 and the bearing box 4 with sealant, the support bearing that meets the accuracy requirements can be fixed on the base 1. The present invention can effectively solve the problem of high requirements for the adjustment accuracy of the support bearing, and greatly improves the construction efficiency, and ensures the construction quality, ensuring the safe operation of the support bearing.

[0053] In step S5, the bearing 5 can be hoisted by using the bearing support hoist provided by the utility model patent CN 222063864 U previously applied for. Figures 5 to 7 As shown, the sling 7 comprises two hanging beams 71 distributed at 90 degrees, each hanging beam 71 has two strip holes, and two brackets 72 are installed, which are connected and fixed by fixing pins 73; the bracket 72 is "L" shaped, and the middle of the sling 7 is installed with a hanging ear 74; the length of the hanging beam 71 of the sling 7 is 2 / 3 to 4 / 5 of the top diameter of the bearing 5. The use of the sling 7 can ensure the accurate and safe lifting of the bearing 5 without a hanging ear. The bearing contact surface should be softly isolated with polytetrafluoroethylene pads.

[0054] As a preferred solution of the present invention, before positioning the support bearing on the base 1 according to the design drawing and fixing the circular bottom plate 2 at the position of the support bearing, the present invention further includes:

[0055] Check the levelness, size and surface cleanliness of base 1.

[0056] Specifically, Figure 2 As shown, four support bearings generally need to be installed on the base 1. In order to ensure the stable operation of the support bearings, the levelness of the base 1 needs to be adjusted, the size needs to be designed, and the base 1 needs to be cleaned until it meets the acceptance requirements.

[0057] As a preferred solution of the present invention, in the process of positioning the support bearing on the base 1 according to the design drawing and fixing the circular bottom plate 2 at the position of the support bearing,

[0058] The base plate 2 is fixed to the position of the supporting bearing by welding.

[0059] It should be noted that: fixing the bottom plate 2 at the position of the support bearing by welding is a preferred solution, and other fixing methods may also be used, such as adhesive fixing, etc., which is not particularly limited in the present invention.

[0060] As a preferred solution of the present invention, a support pad 3 is placed at the center of the bottom plate 2, including:

[0061] Determine the center of the bottom plate 2 and mark the center of the bottom plate 2;

[0062] Place support pad 3 at the marked position.

[0063] Specifically, the center line of each base plate 2 is drawn and marked, and the support pad 3 is placed at the center line position.

[0064] As a preferred solution of the present invention, the circumferential gap between the support pad 3 and the base plate 2 is within 2.5 mm.

[0065] As a preferred solution of the present invention, the preset support pad horizontality requirement is less than 0.5mm / 1000mm.

[0066] As a preferred solution of the present invention, the preset horizontality requirement of the bearing box is 0.5mm / 1000mm.

[0067] As a preferred solution of the present invention, the bearing horizontality requirement is set to 0.5mm / 1000mm.

[0068] It should be noted that the above-mentioned levelness requirements can be set according to actual needs, and the present invention does not make any special limitation on this.

[0069] As a preferred solution of the present invention, after filling the gap between the bottom plate 2 and the support pad 3, the gap between the bottom plate 2 and the bearing box 4, and the gap between the support pad 3 and the bearing box 4 with sealant, the method further includes:

[0070] Remove the adjusting bolt 5 from the bearing box 4.

[0071] As a preferred embodiment of the present invention, during the process of injecting lubricating oil into the designated position in the bearing box 4,

[0072] Use the oiler and oil level gauge to inject lubricating oil into the designated position in the bearing box.

[0073] It can be seen from the above specific implementation methods that the installation method of the GGH heat exchanger support bearing provided by the present invention is to first fix the base plate at the support bearing position of the base, place the support pad at the center of the base plate, and then hoist the bearing box and place it on the base plate, and by making the center of the bearing box coincide with the support pad, the position installation accuracy of the bearing box can be ensured, and the horizontality of the bearing box can be adjusted by adjusting the extension length of the bottom end of the adjusting bolt through the structural design of the ear plate, the adjusting nut and the adjusting bolt on the bearing box, so that the horizontal accuracy adjustment is easier to operate, and the efficiency of the horizontal accuracy adjustment during the bearing installation process is improved; by filling the gap between the base plate and the support pad, the gap between the base plate and the bearing box, and the gap between the support pad and the bearing box with sealant, the support bearing that meets the accuracy requirements can be fixed on the base. The present invention can effectively solve the problem of high adjustment accuracy requirements for the support bearing, and greatly improves the construction efficiency, and ensures the construction quality, ensuring the safe operation of the support bearing.

[0074] As described above, the installation method of the GGH heat exchanger support bearing proposed in the present invention is described by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the installation method of the GGH heat exchanger support bearing proposed in the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A method for installing a GGH heat exchanger support bearing, characterized in that: The steps include: According to the design drawings, the position of the support bearing is located on the base, and a circular bottom plate is fixed at the position of the support bearing; Placing a circular support pad at the center of the base plate, and adjusting the level of the support pad to meet the preset support pad level requirement; The bearing box is hoisted onto the bottom plate, and the center of the bearing box is made to coincide with the support pad; wherein the bearing box comprises a box body; two lifting ears are symmetrically arranged on the outer wall of the box body, at least four ear plates are fixedly arranged at the lower part of the outer wall of the box body, the ear plates are evenly arranged around the circumference of the box body, an adjusting nut is fixedly arranged at the lower part of the outer side of the ear plate, and an adjusting bolt is vertically passed through the adjusting nut; By adjusting the extension length of the bottom end of the adjusting bolt, the horizontality of the bearing box is adjusted so that the bearing box meets the preset bearing box horizontality requirement; Lift the bearing and place it in the bearing box, adjust the horizontality of the bearing box in which the bearing is placed by adjusting the protruding length of the bottom end of the adjusting bolt, so that the bearing meets the preset bearing horizontality requirement, and cover the top of the bearing with a bearing cover; Filling sealant into the gap between the bottom plate and the support pad, the gap between the bottom plate and the bearing box, and the gap between the support pad and the bearing box; After the sealant is completely dry, lubricating oil is injected into the designated position in the bearing box, and a pipe plug of the oil temperature measuring device is installed at the designated position of the bearing box to complete the installation of the support bearing.

2. The method for installing the GGH heat exchanger support bearing according to claim 1, characterized in that: Before positioning the support bearing on the base according to the design drawing and fixing the circular bottom plate at the support bearing, the method further includes: The base is inspected for levelness, dimensions and surface cleanliness.

3. The method for installing the GGH heat exchanger support bearing according to claim 1, characterized in that: In the process of positioning the support bearing on the base according to the design drawing and fixing the circular base plate at the support bearing position, The base plate is fixed to the position of the support bearing by welding.

4. The method for installing the GGH heat exchanger support bearing according to claim 1, characterized in that: Placing a support pad at the center of the bottom plate comprises: Determine the center of the base plate and mark the center of the base plate; Place the support pad at the marked location.

5. The method for installing the GGH heat exchanger support bearing according to claim 1, characterized in that: The circumferential gap between the support pad and the base plate is within 2.5 mm.

6. The method for installing the GGH heat exchanger support bearing according to claim 1, characterized in that: The preset support pad horizontality requirement is less than 0.5mm / 1000mm.

7. The method for installing the GGH heat exchanger support bearing according to claim 1, characterized in that: The preset bearing box horizontality requirement is 0.5mm / 1000mm.

8. The method for installing the GGH heat exchanger support bearing according to claim 1, characterized in that: The horizontality requirement of the bearing is 0.5mm / 1000mm.

9. The method for installing a GGH heat exchanger support bearing according to claim 1, characterized in that: After the sealant is filled into the gap between the bottom plate and the support pad, the gap between the bottom plate and the bearing box, and the gap between the support pad and the bearing box, the method further comprises: Remove the adjusting bolt from the bearing housing.

10. The method for installing a GGH heat exchanger support bearing according to claim 1, characterized in that: In the process of injecting lubricating oil into the designated position in the bearing box, Lubricating oil is injected into the designated position in the bearing box through the oiler and the oil level gauge.

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