A wear-resistant device for boiler

Abstract

The present invention discloses an anti-wear device for a boiler, which relates to the technical field of boiler anti-wear, and comprises a bracket and a plurality of anti-wear rollers, wherein the bracket comprises a support rod and a shaft rod vertically arranged at the upper end of the support rod, and a plurality of anti-wear rollers are sleeved on the shaft rod, and the outer wall of the anti-wear roller is provided with wing plates evenly arranged, and the wing plates obtain power under the impact of the airflow and particles in the boiler, and drive the anti-wear roller to rotate along the shaft rod. In the process of installing the anti-wear roller of the present invention, the maintenance personnel only need to apply a certain thrust to the monomers in turn on the side of the shaft rod away from the economizer or the membrane water-cooled wall, and then the two monomers can be clamped on the shaft rod respectively, and the installation of the anti-wear roller can be completed; and in the process of disassembling the anti-wear roller, the maintenance personnel only need to apply a certain pulling force to the monomers in turn on the side of the shaft rod away from the economizer or the membrane water-cooled wall, and then the two monomers can be removed from the shaft rod respectively, and the disassembly of the anti-wear roller can be completed.

Description

Technical Field

[0001] The invention relates to the technical field of boiler anti-wear, in particular to an anti-wear device for a boiler. Background Art

[0002] Economizer tubes are usually staggered, and the flue gas scours the staggered tube bundles more strongly, causing much more severe wear than straight-line tubes. In addition, the flue gas temperature at the economizer is lower, and the ash particles in the flue gas are relatively hard. These two factors make the economizer wear much more serious than the superheater and preheater. Therefore, effective anti-wear measures should be taken for economizer tubes, while anti-wear measures are generally not taken for superheater tubes. In addition, the inner wall of the boiler often uses a membrane water-cooled wall, which refers to a water-cooled wall composed of airtight tube screens welded together by flat steel and pipes. The membrane water-cooled wall can ensure that the furnace has good tightness, and for negative pressure boilers, it can significantly reduce the air leakage coefficient of the furnace and improve the combustion conditions in the furnace. It can increase the effective radiation heating area, thereby saving steel consumption.

[0003] From the perspective of the fluid dynamics and fluidization theory of the solid fuel particles in the boiler system, the initial or final water-cooled section of the membrane water-cooled wall is more susceptible to the impact of the solid fuel particles and thus causes wear. The existing anti-wear technology of the anti-wear plate can destroy the flow rate and flow direction of the solid fuel particles, thereby playing a good anti-wear role, but it affects the heat exchange of the heating surface and the efficiency of the boiler to a certain extent, and may cause the accumulation of fuel on the anti-wear plate, thereby affecting the combustion and heat transfer efficiency; while the high-temperature spray anti-wear technology requires a large amount of investment, and has a short service life, causing local wear after falling off, and may cause pipe bursts if it is not repaired and maintained in time.

[0004] Chinese patent CN110017472B discloses an anti-wear device for a boiler, which includes a bracket and an anti-wear roller, wherein the bracket includes a support rod and a shaft rod vertically arranged at the upper end of the support rod, the anti-wear roller is sleeved on the shaft rod, and the outer wall of the anti-wear roller has wing plates evenly arranged. This invention patent forms a protective layer for the boiler membrane water-cooled wall by arranging a support rod, a shaft rod and an anti-wear roller, and uses the anti-wear roller installed on the shaft rod to resist the impact from solid particle fuel and effectively protect the membrane water-cooled wall. However, since multiple anti-wear rollers are sleeved on the shaft rod in sequence, during maintenance, when the anti-wear roller at the middle position needs to be replaced, the outer anti-wear rollers need to be slid out in sequence before the anti-wear roller at the middle position can be taken out, and the replacement operation is relatively troublesome and the labor intensity of the maintenance personnel is relatively high. Summary of the invention

[0005] The object of the present invention is to provide a wear protection device for a boiler to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0007] The present invention provides an anti-wear device for a boiler, comprising a bracket and a plurality of anti-wear rollers, wherein the bracket comprises a support rod and a shaft rod vertically arranged at the upper end of the support rod, wherein the plurality of anti-wear rollers are sleeved on the shaft rod, and the outer wall of the anti-wear roller is provided with wing plates evenly arranged, wherein the wing plates obtain power under the impact of airflow and particles in the boiler, and drive the anti-wear roller to rotate along the shaft rod, wherein the anti-wear roller is formed by splicing two monomers, wherein the monomer is an arc structure as a whole, wherein the monomer comprises an inner arc surface and an outer arc surface coaxial with the shaft rod, wherein in the axial direction of the shaft rod, a first arc end surface and a second arc end surface are respectively formed between the inner arc surface and the outer arc surface of the monomer; and in the circumferential direction of the shaft rod, a first bonding surface and a second bonding surface are respectively formed between the inner arc surface and the outer arc surface of the monomer;

[0008] The circumference of the inner arc side of the first arc end face is equal to the circumference of the inner arc side of the second arc end face, and the circumference values ​​of both are half of the circumference of the transverse cross section of the shaft;

[0009] The first and second bonding surfaces are both inclined, with the horizontal plane passing through the central axis of the inner arc surface of the monomer as the setting plane, and the projections of the first and second bonding surfaces on the setting plane are two straight lines of equal length and intersecting, and the intersection of the two straight lines is on the central axis of the inner arc surface of the monomer;

[0010] A first clamping portion is formed at the first joint surface of the monomer, and a second clamping portion is formed at the second joint surface of the monomer. The first clamping portion and the second clamping portion are both provided with a separation groove; the separation groove separates the first clamping portion and the second clamping portion into an inner sheet portion and an outer sheet portion.

[0011] Furthermore, a bent portion inclined toward the outer arc surface is provided at one suspended end of the inner sheet portion on the first clamping portion and the second clamping portion.

[0012] Furthermore, the angle between the two straight lines in the axial direction of the shaft is 5°-10°.

[0013] Furthermore, the depth of the separation groove on the first clamping portion decreases continuously from the first arc end surface to the second arc end surface; the depth of the separation groove on the second clamping portion decreases continuously from the second arc end surface to the first arc end surface.

[0014] Furthermore, the outer sheet portion protrudes outward to form a protrusion corresponding to the separation groove, and when the two monomers are spliced ​​into the anti-wear roller, the two protrusions form the wing plate.

[0015] Further, in the radial cross section of the shaft, the minimum gap between the outer sheet portion of the first clamping portion and the outer sheet portion of the second clamping portion is greater than the diameter of the shaft.

[0016] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0017] 1. During the installation of the anti-wear roller of the present invention, the maintenance personnel only need to apply a certain thrust to the monomers in turn on the side of the shaft rod away from the economizer or the membrane water-cooled wall, so that the two monomers can be respectively clamped on the shaft rod, and the installation of the anti-wear roller can be completed; and during the disassembly of the anti-wear roller, the maintenance personnel only need to apply a certain pulling force to the monomers in turn on the side of the shaft rod away from the economizer or the membrane water-cooled wall, so that the two monomers can be respectively removed from the shaft rod, and the disassembly of the anti-wear roller can be completed.

[0018] 2. The two monomers constituting the anti-wear roller of the present invention have the same structure. Therefore, during production, only one set of molds or processing equipment is needed to produce monomers of the same size, thereby reducing the production cost accordingly.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] Figure 1 It is a partial structural schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the anti-wear roller of the present invention;

[0023] Figure 3 is a schematic structural diagram of a monomer of the present invention from a first perspective;

[0024] Figure 4 is another perspective structural schematic diagram of the monomer of the present invention;

[0025] Figure 5 It is a schematic diagram of the monomer structure from the right side of the present invention;

[0026] Figure 6 It is a schematic diagram of the monomer structure of the present invention from the left side;

[0027] Figure 7 It is a simplified schematic diagram of the anti-wear roller process of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure after installation of the present invention.

[0029] In the figure:

[0030] 1-shaft rod; 2-wear-proof roller; 21-monobody; 211-inner arc surface; 212-outer arc surface; 213-first circular arc end surface; 214-second circular arc end surface; 215-first joint surface; 216-second joint surface; 3-wing plate; 4-first clamping part; 5-second clamping part; 6-partition groove; 7-inner sheet; 71-bending part; 8-outer sheet. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0032] See also Figure 1-Figure 8 The present invention provides an anti-wear device for a boiler, comprising a bracket and a plurality of anti-wear rollers 2, wherein the bracket comprises a support rod and a shaft rod 1 vertically arranged at the upper end of the support rod, and the plurality of anti-wear rollers 2 are sleeved on the shaft rod 1, and wing plates 3 are evenly arranged on the outer wall of the anti-wear rollers 2. The wing plates 3 obtain power under the impact of airflow and particles in the boiler, and drive the anti-wear rollers 2 to rotate along the shaft rod 1.

[0033] like Figure 1 and Figure 8 As shown, when in use, the lower end of the support rod is welded and fixed to the vulnerable part of the economizer or membrane water-cooled wall, so that the anti-wear roller 2 is set facing the air outlet direction in the boiler. At this time, several anti-wear rollers 2 can form a planar or linear "protective layer" at the vulnerable part of the economizer or membrane water-cooled wall to prevent the flue gas from carrying solid fuel particles and hitting the vulnerable part of the economizer or membrane water-cooled wall, thereby effectively protecting the vulnerable part of the economizer or membrane water-cooled wall. In the process of protecting the economizer or membrane water-cooled wall, under the impact of airflow and particles, the anti-wear roller 2 can obtain power to rotate, so that each surface of the anti-wear roller 2 is evenly impacted, extending the service life of the anti-wear roller 2.

[0034] Since multiple anti-wear rollers 2 are sequentially sleeved on the shaft 1, during maintenance, when the anti-wear roller 2 at the middle position needs to be replaced, the outer anti-wear rollers 2 need to be slid out sequentially before the anti-wear roller 2 at the middle position can be taken out. The replacement operation is more troublesome and the labor intensity of the maintenance personnel is relatively high.

[0035] In order to facilitate the replacement of the severely worn anti-wear roller 2 during maintenance and overhaul, so as to reduce the labor intensity of maintenance personnel and improve efficiency, such as Figure 2-Figure 4As shown, the anti-wear roller 2 is formed by splicing two monomers 21, and the monomer 21 is an arc structure as a whole. The monomer 21 includes an inner arc surface 211 and an outer arc surface 212 coaxial with the shaft rod 1. In the axial direction of the shaft rod 1, a first arc end surface 213 and a second arc end surface 214 are respectively formed between the inner arc surface 211 and the outer arc surface 212 of the monomer 21; in the circumferential direction of the shaft rod 1, a first bonding surface 215 and a second bonding surface 216 are respectively formed between the inner arc surface 211 and the outer arc surface 212 of the monomer 21;

[0036] like Figure 5 and Figure 6 As shown, the inner arc side circumference of the first arc end surface 213 is equal to the inner arc side circumference of the second arc end surface 214, and the circumference values ​​of both are half of the circumference of the transverse cross section of the shaft rod 1;

[0037] like Figure 3 As shown, the first bonding surface 215 and the second bonding surface 216 are both inclined, and the horizontal plane passing through the central axis of the inner arc surface of the monomer 21 is set as the set plane L. The projections of the first bonding surface 215 and the second bonding surface 216 on the set plane L are two straight lines of equal length and intersecting, and the intersection of the two straight lines is on the central axis of the inner arc surface of the monomer 21;

[0038] like Figure 4 As shown, a first clamping portion 4 is formed at the first joint surface 215 of the monomer, and a second clamping portion 5 is formed at the second joint surface 216 of the monomer, and a separation groove 6 is provided on the first clamping portion 4 and the second clamping portion 5; the separation groove 6 separates the first clamping portion 4 and the second clamping portion 5 into an inner sheet 7 and an outer sheet 8.

[0039] This embodiment is based on the above-mentioned arrangement. During the installation of the anti-wear roller 2, the maintenance personnel only need to apply a certain thrust to the monomers in turn on the side of the shaft rod 1 away from the economizer or the membrane water-cooled wall, so that the two monomers 21 can be respectively clamped on the shaft rod 1, and the installation of the anti-wear roller 2 can be completed; and during the disassembly of the anti-wear roller 2, the maintenance personnel only need to apply a certain pulling force to the monomers in turn on the side of the shaft rod 1 away from the economizer or the membrane water-cooled wall, so that the two monomers 21 can be respectively removed from the shaft rod 1, and the disassembly of the anti-wear roller 2 can be completed.

[0040] Specifically, for the convenience of introduction, the two monomers 21 constituting the anti-wear roller 2 are respectively referred to as the first monomer S1 and the second monomer S2;

[0041] like Figure 7As shown, during the installation of the anti-wear roller 2, the staff first holds the first monomer S1 and makes the inner arc surface 211 of the first monomer S1 face the shaft rod 1. When the inner sheet portions 7 of the first clamping portion 4 and the second clamping portion 5 of the first monomer S1 come into contact with the shaft rod 1, a certain force is applied to the first monomer S1 to bend the two inner sheet portions 7 of the first monomer S1, so that the monomer 21 is smoothly clamped on the shaft rod 1. When the inner arc surface 211 of the first monomer S1 comes into contact with the outer peripheral surface of the shaft rod 1, the two inner sheet portions 7 can restore the deformation, so that the first monomer S1 can "hold" the shaft rod 1 with the help of its first clamping portion 4 and the second clamping portion 5 without falling (such as Figure 7 shown);

[0042] At this time, the staff can rotate the first monomer S1 so that the first monomer S1 is rotated to the side close to the economizer or membrane water wall (such as Figure 1 and Figure 8 As shown, the anti-wear roller 2 is generally installed close to the economizer or the membrane water-cooled wall, that is, the gap between the anti-wear roller 2 and the economizer or the membrane water-cooled wall is reduced, and in order to improve the protection effect, the gap between adjacent anti-wear rollers 2 is also smaller. Therefore, the space for installing the anti-wear roller 2 is relatively narrow; and the present invention, through the unique design of the monomer 21, can make the monomer 21 not fall off the shaft rod 1 after being clamped on the shaft rod 1. Therefore, the position of the monomer 21 can be adjusted, that is, when the first monomer S1 is installed on the shaft rod 1, the first monomer S1 can be rotated to the side close to the economizer or the membrane water-cooled wall, so as to facilitate the staff to continue to install the second monomer S2 on the side of the shaft rod 1 away from the economizer or the membrane water-cooled wall).

[0043] When installing the second monomer S2, repeat the above-mentioned operation of installing the first monomer S1, and clamp the second monomer S2 on the shaft 1 on one side of the first monomer S1 to complete the installation of the anti-wear roller 2. When the second monomer S2 is also clamped on the shaft 1 of the first monomer S1, the first bonding surface 215 of the second monomer S2 abuts against the second bonding surface 216 of the first monomer S1, and the second bonding surface 216 of the second monomer S2 abuts against the second bonding surface 216 of the first monomer S1, so that the second monomer S2 and the first monomer S1 are locked in the axial direction.

[0044] During the process of disassembling and installing the anti-wear roller 2, similarly, the staff can rotate the anti-wear roller 2 to rotate the first monomer S1 and the second monomer S2 on the shaft 1 in sequence to the side away from the economizer or the membrane water-cooled wall, and then extend the fingers of both hands into the dividing groove 6 to apply a certain pulling force, so that the first monomer S1 and the second monomer S2 can be easily removed from the shaft 1, completing the disassembly of the anti-wear roller 2.

[0045] Compared with conventional designs, the semicircular split structure of the anti-wear roller 2 in the present invention not only does not require the coordinated operation of both hands, but also allows easy installation and disassembly of the anti-wear roller in a narrow space. In addition, the split installation of the anti-wear roller in the present invention does not require the aid of additional connecting structures, such as bolts.

[0046] It is worth mentioning that the two monomers 21 constituting the anti-wear roller 2 of the present invention have the same structure. Therefore, during production, only one set of molds or processing equipment is needed to produce monomers 21 of the same size, which reduces the production cost accordingly.

[0047] like Figure 4 As shown, in this embodiment, the inner sheet 7 on the first clamping portion 4 and the second clamping portion 5 is provided with a bending portion 71 inclined toward the outer arc surface at one end thereof. The bending portion 71 is designed so that the inner sheet 7 can bend when a certain force is applied to the monomer 21.

[0048] like Figure 3 As shown, in this embodiment, the angle β between the two straight lines in the axial direction of the shaft rod 1 is 5°-10°.

[0049] like Figure 2 and Figure 3 As shown, in this embodiment, the depth of the separation groove 6 on the first clamping part 4 decreases from the first arc end face 213 to the second arc end face 214; the depth of the separation groove 6 on the second clamping part 5 decreases from the second arc end face 214 to the first arc end face 213. Based on the above design, when the two monomers 21 form the anti-wear roller 2, two inclined channels can be formed between the two monomers 21. When the anti-wear roller 2 rotates, the two inclined channels can drive the surrounding airflow to flow, and the airflow can weaken the power of the fixed particles passing through the adjacent anti-wear rollers 2, thereby further improving the protection effect.

[0050] In this embodiment, the outer sheet 8 protrudes outward to form a protrusion corresponding to the separation groove 6. When the two monomers 21 are spliced ​​into the anti-wear roller 2, the two protrusions form the wing plate 3. Based on the above design, the protrusion of the present invention can make up for the lack of strength of the anti-wear roller 2 at this position due to the setting of the separation groove 6.

[0051] In this embodiment, in the radial cross section of the shaft 1 , the minimum gap between the outer sheet portions 8 of the two first clamping portions 4 and the outer sheet portion 8 of the second clamping portion 5 is greater than the diameter of the shaft 1 .

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wear-resistant device for a boiler, comprising a bracket and a plurality of wear-resistant rollers, wherein the bracket comprises a support rod and a shaft rod vertically arranged at the upper end of the support rod, wherein a plurality of wear-resistant rollers are sleeved on the shaft rod, and wing plates are evenly arranged on the outer wall of the wear-resistant rollers, wherein the wing plates obtain power under the impact of airflow and particles in the boiler and drive the wear-resistant rollers to rotate along the shaft rod, wherein the wear-resistant rollers are sleeved on the shaft rod, and the outer wall of the wear-resistant rollers is provided with wing plates evenly arranged, and the wing plates obtain power under the impact of airflow and particles in the boiler and drive the wear-resistant rollers to rotate along the shaft rod, wherein the wear-resistant rollers are sleeved on the shaft rod, and the wing plates ... The anti-wear roller is formed by splicing two monomers, and the monomer is an arc structure as a whole. The monomer includes an inner arc surface and an outer arc surface coaxial with the shaft rod. In the axial direction of the shaft rod, a first arc end surface and a second arc end surface are formed between the inner arc surface and the outer arc surface of the monomer respectively; in the circumferential direction of the shaft rod, a first bonding surface and a second bonding surface are formed between the inner arc surface and the outer arc surface of the monomer respectively; The circumference of the inner arc side of the first arc end face is equal to the circumference of the inner arc side of the second arc end face, and the circumference values ​​of both are half of the circumference of the transverse cross section of the shaft; The first and second bonding surfaces are both inclined, with the horizontal plane passing through the central axis of the inner arc surface of the monomer as the setting plane, and the projections of the first and second bonding surfaces on the setting plane are two straight lines of equal length and intersecting, and the intersection of the two straight lines is on the central axis of the inner arc surface of the monomer; A first clamping portion is formed at the first joint surface of the monomer, and a second clamping portion is formed at the second joint surface of the monomer. The first clamping portion and the second clamping portion are both provided with a separation groove; the separation groove separates the first clamping portion and the second clamping portion into an inner sheet portion and an outer sheet portion.

2. The boiler wear protection device according to claim 1, characterized in that: A bent portion inclined toward the outer arc surface is provided at one suspended end of the inner sheet portion on the first clamping portion and the second clamping portion.

3. The boiler wear protection device according to claim 2, characterized in that: The included angle between the two straight lines in the axial direction of the shaft is 5°-10°.

4. The boiler wear protection device according to claim 3, characterized in that: The separation groove on the first clamping part has a depth that decreases from one side of the first arc end surface to one side of the second arc end surface; the separation groove on the second clamping part has a depth that decreases from one side of the second arc end surface to one side of the first arc end surface.

5. The boiler wear prevention device according to claim 4, characterized in that: The outer sheet portion protrudes outward to form a protrusion corresponding to the separation groove. When the two monomers are spliced ​​into the anti-wear roller, the two protrusions form the wing plate.

6. The boiler wear protection device according to claim 5, characterized in that: In a radial cross section of the shaft, a minimum gap between the outer sheet portion of the first clamping portion and the outer sheet portion of the second clamping portion is greater than a diameter of the shaft.

Images