High-permeability trolley grate
By designing a high transmittance trolley grate, the spacing arrangement of the grid strips and channel structures are used to solve the problem of poor breathability of the sintering machine material layer, and the effect of significantly reducing overwind resistance is achieved.
Patent Information
- Application Number
- CN202421320941.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-06-11
AI Technical Summary
Due to the significant increase in the material layer of the sintering machine, the air permeability of the material layer becomes worse, resulting in the impact of the quality of the sintered ore. The existing grate bar technology cannot effectively reduce the wind resistance of the trolley grate bar.
A high-transmittance trolley grate is designed. By providing a grating plate on the top of the carrier frame, the grating plate is composed of spaced grid strips, and upper and lower channels are left between adjacent grid strips to form an integrated structure to improve the ventilation area.
The overwind area of the trolley grate bar is significantly improved, effectively reducing the overwind resistance, and greatly improving the breathability of the mixture.
Smart Images
Figure CN222598459U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of grate bars used for sintering, and particularly relates to a high-permeability trolley grate. Background Art
[0002] Sinter is the main raw material for blast furnace ironmaking. In 2023, the total output of sinter in China exceeded 1.3 billion tons, and sintering machines are the main equipment for producing sinter. Sintering technology is developing towards large production capacity and thick material layer. The material layer thickness of sintering machines has increased from about 500 mm to 900 - 1000 mm. Currently, the material layer thickness of most sintering machines is about 900 mm.
[0003] Due to the significant increase in the material layer, the resistance of sintering air passing through the material layer has also increased significantly, the air permeability of the material layer has become poor, seriously affecting the quality of sinter, making the problem of material layer air permeability the core problem in the progress and development of sintering technology. Content of the Utility Model
[0004] According to the deficiencies in the above prior art, the technical problem to be solved by the utility model is: to provide a high-permeability trolley grate, which significantly increases the air-permeable area compared with the existing grate bar technology and effectively reduces the air passing resistance of the trolley grate bars.
[0005] The high-permeability trolley grate includes a bearing frame. A grid plate is arranged on the top of the bearing frame. The grid plate is composed of multiple grid bars arranged at intervals, and a channel communicating up and down is left between adjacent grid bars;
[0006] The bearing frame includes a support body. End seats are arranged on both the left and right sides of the top of the support body. The grid plate is installed between the two end seats. A flow channel is opened at the top of the end seat corresponding to each channel, and the corresponding flow channel communicates with the channel.
[0007] Furthermore, the bearing frame and the grid plate are of an integral structure.
[0008] Furthermore, the support body includes a cross beam. Two longitudinal beams are longitudinally fixed on the cross beam. The cross beam and the longitudinal beams together form a "廾"-shaped structure, wherein the middle section of the grid bar is connected to the cross beam, and the two end seats are correspondingly installed at both ends of the longitudinal beams.
[0009] Furthermore, a half-channel is left at the front side of the grid plate, and a corresponding half-flow channel is opened at the top of the grid bar end seat for the half-channel.
[0010] Furthermore, the transverse width of the half-channel and the half-flow channel is the same as that of the channel.
[0011] Furthermore, a half-channel is left at the rear side of the grid plate, and a corresponding half-flow channel is opened at the top of the grid bar end seat for the half-channel; the transverse width of the half-channel and the half-flow channel is half of the transverse width of the channel.
[0012] Furthermore, a buckle claw for mounting with the trolley body is provided at the bottom of each end of the longitudinal beam.
[0013] Furthermore, the longitudinal beam and the grid bar do not contact each other, and the distance between the longitudinal beam and the grid bar is 20 mm to 50 mm.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] The utility model solves the problem of air permeability of the mixture by reducing the wind resistance of the trolley grate bars. Compared with the traditional trolley grate bars, the coordinated design of the flow channels and channels on the grid plate can multiply the wind area of the trolley grate bars and significantly reduce the wind resistance of the trolley grate bars. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0018] Figure 2 for Figure 1 A schematic diagram of a top view structure;
[0019] Figure 3 for Figure 1 A schematic diagram of a left-view enlarged structure;
[0020] Figure 4 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;
[0021] Figure 5 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;
[0022] Figure 6 The three-dimensional structure of the utility model is shown in FIG. Figure 3 ;
[0023] Figure 7 This is a schematic diagram of the installation structure of the utility model.
[0024] Figure numerals: 1. Carrying frame; 1.1. Longitudinal beam; 1.2. End seat; 1.3. Cross beam; 1.4. Claw; 2. Grid plate; 2.1. Flow channel; 2.2. Grid bar; 2.3. Channel; 2.4. Semi-flow channel; 2.5. Semi-channel; 3. Trolley baffle; 4. Mixture; 5. Trolley body. DETAILED DESCRIPTION
[0025] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant content and do not limit the present disclosure. In addition, it should be noted that for the convenience of description, only the parts related to the present disclosure are shown in the drawings.
[0026] It should be noted that, without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings and embodiments.
[0027] Embodiment
[0028] A high-transmittance trolley grate according to this embodiment, as Figure 1 and Figure 2 shown, includes a carrier 1. A grid plate 2 is arranged on the top of the carrier 1. The grid plate 2 is composed of a plurality of grid bars 2.2 arranged at intervals. A channel 2.3 communicating up and down is left between adjacent grid bars 2.2;
[0029] The carrier 1 includes a support body. End seats 1.2 are arranged on both the left and right sides of the top of the support body. The grid plate 2 is installed between the two end seats 1.2. A flow channel 2.1 is opened at the top of the end seat 1.2 corresponding to each channel 2.3, and the corresponding flow channel 2.1 communicates with the channel 2.3.
[0030] The carrier 1 and the grid plate 2 are of an integral structure, which is convenient for installation after being integrated.
[0031] For the convenience of ventilation, as Figures 3 to 6 shown, the support body includes a cross beam 1.3. Two longitudinal beams 1.1 are longitudinally fixed on the cross beam 1.3. The cross beam 1.3 and the longitudinal beams 1.1 together form a "gong" - shaped structure. The middle section of the grid bar 2.2 is connected to the cross beam 1.3, and the two end seats 1.2 are correspondingly installed at both ends of the longitudinal beams 1.1; A claw 1.4 for installing with the trolley body 5 is arranged at the bottom of each end of the longitudinal beam 1.1. The reason for designing one cross beam 1.3 and two longitudinal beams 1.1 in this paragraph is determined according to the size of the existing trolley body 5. In actual application, if the size of the trolley body 5 changes, several cross beams 1.3 and several longitudinal beams 1.1 can also be used to achieve it. When combining, it can also be in a net - like structure or other structures convenient for ventilation as a whole.
[0032] In order to further not affect the ventilation of the grid bar 2.2 and improve the ventilation rate, the longitudinal beam 1.1 and the grid bar 2.2 do not contact each other, and the distance between the longitudinal beam 1.1 and the grid bar 2.2 is 20mm to 50mm. In application, the distance between the longitudinal beam 1.1 and the grid bar 2.2 can be 20mm, 50mm or any value between 20mm and 50mm (such as 30mm, 40mm or 45mm, etc.), and can also be other values due to the technical updates of the industry, as long as the purpose of improving the ventilation rate is achieved.
[0033] like Figure 7 As shown, considering that multiple designs of the present invention will be assembled on a trolley body 5, in order to solve the ventilation problem at the assembly point during assembly, the following two solutions are preferred:
[0034] Solution 1: A half channel 2.5 is left on the front side of the grid plate 2, and a communicating half channel 2.4 is opened at the top of the grid bar end seat 1.2 corresponding to the half channel 2.5; the lateral width of the half channel 2.5 and the half channel 2.4 is consistent with the lateral width of the channel 2.3.
[0035] Option 2: Half channels 2.5 are left on the front and rear sides of the grid plate 2, and corresponding half channels 2.5 are provided with interconnected half channels 2.4 at the top of the grid bar end seat 1.2; the lateral width of the half channels 2.5 and the half channels 2.4 is half of the lateral width of the channel 2.3.
[0036] Relatively speaking, the second scheme is more convenient in assembly, and there is no need to consider the direction. The half-channels 2.5 and half-flow channels 2.4 corresponding to the two grid plates 2 will directly form a channel 2.3 and a half-flow channel 2.4. However, in the first scheme, attention should be paid to the direction, because the grid plates 2 with only one side having the half-channels 2.5 and half-flow channels 2.4 and the other side not having the half-channels 2.5 and half-flow channels 2.4 will be assembled.
[0037] In application, considering the strength, the semi-channel 2.4 is not connected from top to bottom, but is just a groove.
[0038] When in working state, Figure 7As shown, a new grate consisting of a carrier frame 1 and a grid plate 2 is installed on a trolley body 5. Trolley baffles 3 are installed on both sides of the trolley body 5. The trolley baffles 3 are used to block the mixture 4 on both sides. The mixture 4 is supported on the top of the new grate. The thickness is usually 700-900 mm. The trolley is placed on the wind box of the sintering machine as a whole. The wind box forms a negative pressure of 17,000-20,000 Pa under the action of the main exhaust fan. Due to the negative pressure, the sintering air enters the mixture 4 from the upper surface of the mixture 4, passes through the mixture layer, and the air through the flow channel 2.1 of the new grate is collected into the channel 2.3 and enters the wind box through the channel 2.3. The grid bars 2.2 are arranged at set intervals to form a grid plate 2, which is used to carry the mixture 4 and prevent the mixture 4 from falling directly into the wind box. The half flow channel 2.4 and the half channel 2.5 are arranged on both sides of the new grate bars. After the new grate bars are correctly installed on the trolley body 5, a flow channel 2.1 and a channel 2.3 will be formed between two adjacent new grate bars.
[0039] The load applied by the mixture 4 on the grid plate 2 is transferred to the entire supporting frame 1 through the longitudinal beam 1.1, the end seat 1.2 and the cross beam 1.3. The supporting frame 1 has sufficient structural strength to withstand the load transferred from the grid plate 2 and provide reliable support for the grid plate 2. The claws 1.4 play a positioning and fixing role to ensure that the supporting frame 1 is reliably fixed on the trolley body 5.
[0040] The new grate designed in this embodiment has a wind passing area that is about three times that of the traditional trolley grate, which can effectively reduce the wind passing resistance of the trolley grate.
[0041] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.
[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0043] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.
Claims
1. A high-transmittance trolley grate, comprising a carrier frame (1), characterized in that: A grid plate (2) is arranged on the top of the carrier frame (1). The grid plate (2) is composed of multiple grid bars (2.2) arranged at intervals, and a vertically communicating channel (2.3) is left between adjacent grid bars (2.2). The carrier frame (1) includes a support body. End seats (1.2) are arranged on both the left and right sides of the top of the support body. The grid plate (2) is installed between the two end seats (1.2). A flow channel (2.1) is opened at the top of the end seat (1.2) corresponding to each channel (2.3), and the corresponding flow channel (2.1) communicates with the channel (2.3).
2. The high-transmittance trolley grate according to claim 1, characterized in that: The carrier frame (1) and the grid plate (2) are of an integral structure.
3. The high-transmittance trolley grate according to claim 1 or 2, characterized in that: The support body includes a cross beam (1.3). Two longitudinal beams (1.1) are longitudinally fixed on the cross beam (1.3). The cross beam (1.3) and the longitudinal beams (1.1) together form a "廾"-shaped structure. The middle section of the grid bar (2.2) is connected to the cross beam (1.3), and the two end seats (1.2) are correspondingly installed at both ends of the longitudinal beams (1.1).
4. The high-transmittance trolley grate according to claim 3, characterized in that: A half-channel (2.5) is left at the front side of the grid plate (2). Corresponding to the half-channel (2.5), half-flow channels (2.4) communicating with each other are opened at the top of the grid bar end seats (1.2).
5. The high-transmittance trolley grate according to claim 4, characterized in that: The transverse width of the half-channel (2.5) and the half-flow channel (2.4) is the same as the transverse width of the channel (2.3).
6. The high-transmittance trolley grate according to claim 4, characterized in that: A half-channel (2.5) is left at the rear side of the grid plate (2). Corresponding to the half-channel (2.5), half-flow channels (2.4) communicating with each other are opened at the top of the grid bar end seats (1.2). The transverse width of the half-channel (2.5) and the half-flow channel (2.4) is half of the transverse width of the channel (2.3).
7. The high-transmittance trolley grate according to claim 3, characterized in that: A claw (1.4) for installation with the trolley body (5) is arranged at the bottom of each end of the longitudinal beam (1.1).
8. The high-transmittance trolley grate according to claim 3, characterized in that: The longitudinal beam (1.1) and the grid bar (2.2) do not contact each other, and the distance between the longitudinal beam (1.1) and the grid bar (2.2) is 20 mm to 50 mm.