A head bend assembly, a head change system and method of a sintering machine trolley

Abstract

The application provides a head bending track assembly, a sintering machine trolley head replacement system and method, which comprises a first outer pressure rail section, a second outer pressure rail section and an inner pressure rail section arranged at the head of the sintering machine. The first outer pressure rail section and the second outer pressure rail section have an access interval for the sintering machine trolley to be hoisted in or hoisted out. The second outer pressure rail section extends along the horizontal process direction of the sintering machine. The first outer pressure rail section comprises a first bending section matched with the star wheel of the head of the sintering machine. The inner pressure rail section comprises a second bending section arranged in parallel and spaced apart from the first bending section, and a first horizontal section arranged in parallel and spaced apart from the second outer pressure rail section. The system comprises the head bending track assembly, a hoist assembly, a sintering machine main body, a new trolley placed outside the sintering machine main body, and a trolley to be replaced running on the sintering machine main body. The trolley replacement efficiency of the application is high, the influence on the quality of the sintered ore is smaller, and the application can be transformed on the basis of the existing sintering machine.

Description

Technical Field

[0001] This invention relates to the field of sintering technology, and in particular to a head bending component, a head replacement system and method for a sintering machine trolley. Background Technology

[0002] Statistics show that 30% of mechanical failures in sintering systems are caused by malfunctions in the sintering machine trolley. Trolley problems result in downtime of approximately 124 hours per year, accounting for over 50% of unplanned downtime. This severely restricts the sintering machine's operational efficiency. Therefore, reducing the frequency and duration of sintering machine trolley downtime for replacement is crucial for improving the sintering machine's operational efficiency.

[0003] Traditionally, the sintering machine replacement location is usually designed at the tail end of the sintering machine. Furthermore, the replacement process requires stopping the sintering machine and cleaning the material, which negatively impacts sintering production, reducing the quality and yield of sintered ore. The replacement process is also quite complex and time-consuming.

[0004] The traditional trolley replacement method involves stopping feeding when the faulty trolley passes the material placing device, leaving the faulty trolley and its preceding and following trolleys empty. Once the faulty trolley reaches a suitable position, it is stopped, workers open the rear moving frame, creating a gap between the front and rear of the trolley. Hooks are then attached to both sides of the trolley to lift it out of the rail section, and a new trolley is hoisted in to complete the replacement. This process is time-consuming and complex, disrupting the sintering balance of the sintering machine. Adjusting the sintering machine back to operating status often takes a long time, impacting sintering production efficiency. The direct downtime during replacement is approximately 15-30 minutes. Trolley replacement causes production fluctuations, affects sinter quality, increases the likelihood of material blockage in the mixing trough during restart, and in severe cases, can affect blast furnace system production.

[0005] In view of this, it is necessary to propose a head bending component, a head replacement system and method for the sintering machine trolley to solve or at least alleviate the above-mentioned defects. Summary of the Invention

[0006] The main objective of this invention is to provide a head bend assembly, a head replacement system and method for sintering machine trolleys, in order to solve the technical problem that the replacement time of the tail trolley replacement scheme in the prior art is long, which leads to the disruption of the sintering balance of the sintering machine and thus affects the efficiency of sintering production.

[0007] To achieve the above objectives, the present invention provides a head bend assembly, comprising a first outer pressure rail section, a second outer pressure rail section, and an inner pressure rail section disposed at the head of a sintering machine, wherein the first outer pressure rail section and the second outer pressure rail section are both disposed outside the inner pressure rail section; wherein,

[0008] A pressure wheel space matching the wheels of the sintering machine trolley is formed between the first external pressure rail section and the inner pressure rail section, and between the second external pressure rail section and the inner pressure rail section; an entry / exit interval for the sintering machine trolley to be hoisted in or out is provided between the first external pressure rail section and the second external pressure rail section; the second external pressure rail section extends along the horizontal progress direction of the sintering machine, the first external pressure rail section includes a first curved section matching the star wheel at the head of the sintering machine, and the inner pressure rail section includes a second curved section spaced parallel to and spaced apart from the first curved section, and a first horizontal section spaced parallel to and spaced apart from the second external pressure rail section.

[0009] Preferably, the entry / exit interval is located at the top of the inner pressure rail section, and the size of the entry / exit interval matches the distance between the two wheels on one side of the sintering machine trolley.

[0010] Preferably, the first curved section has a first inclined surface at one end near the second external pressure rail section for guiding the wheels of the sintering machine trolley out of the first curved section, and / or the second external pressure rail section has a second inclined surface at one end near the first curved section for guiding the wheels of the sintering machine trolley into the second external pressure rail section.

[0011] Preferably, the first external pressure rail section further includes a second horizontal section extending along the horizontal return direction of the sintering machine, the second horizontal section being connected to the bottom end of the first curved section, and the internal pressure rail section further includes a third horizontal section extending along the horizontal return direction of the sintering machine, the third horizontal section being connected to the second curved section, the third horizontal section being parallel to and spaced apart from the second horizontal section and located inside the second horizontal section, and the third horizontal section having a third inclined surface at one end away from the second curved section to guide the wheels of the sintering machine trolley into the third horizontal section.

[0012] The present invention also provides a head replacement system for a sintering machine trolley, including the head bend assembly as described above, a lifting device assembly, a sintering machine body, a new trolley placed outside the sintering machine body, and a trolley to be replaced running on the sintering machine body; wherein,

[0013] The sintering machine body includes a head star wheel assembly. The rotation of the head star wheel assembly drives the trolley to be replaced to move synchronously, so that the wheels of the trolley to be replaced move within the pressure wheel space.

[0014] The head bend assembly is matched with the head star wheel assembly in position. The lifting assembly is used to lift the trolley to be replaced from the sintering machine through the inlet / outlet interval to the outside of the sintering machine, and to lift the new trolley from the outside of the sintering machine through the inlet / outlet interval into the sintering machine.

[0015] Preferably, the lifting assembly includes a lifting rail installed in the sintering plant, a lifting component movably arranged along the extension direction of the lifting rail, and a trolley clamping assembly. The trolley clamping assembly includes a sleeve, a U-shaped pin, and a first hook and a second hook that match the wheels of the sintering machine trolley.

[0016] Both the first hook and the second hook have through holes for the sleeve to pass through, and both the first hook and the second hook can be rotatably connected to the sleeve;

[0017] The first hook has a first through hole through which one end of the U-shaped pin passes, and the second hook has a second through hole through which the other end of the U-shaped pin passes; wherein, after the U-shaped pin is inserted into the first through hole and the second through hole, the interval between the first hook and the second hook matches the interval between the two wheels on one side of the sintering machine trolley, so as to clamp the sintering machine trolley;

[0018] The lifting assembly's hanging end is connected to the sleeve to lift the trolley to be replaced out of the sintering machine trolley body or to lift the new trolley into the sintering machine body.

[0019] Preferably, the lifting assembly includes a trolley, a wire rope, and a hook. The trolley is movable along the extension direction of the lifting rail. The wire rope is wound around the trolley and its length is extendable. The hook is connected to the wire rope. The hook is hooked inside the sleeve and connected to the sleeve.

[0020] The present invention also provides a method for changing the head of a sintering machine trolley, applied to the head changing system of the sintering machine trolley as described above, comprising the following steps:

[0021] S1. Identify the trolley to be replaced and prepare the new trolley next to the area to be replaced;

[0022] S2, when all the wheels of the trolley to be replaced are in the in-out interval, control the sintering machine body to stop;

[0023] S3, control the lifting assembly to run directly above the entry / exit interval, and use the lifting assembly to lift the trolley to be replaced from the sintering machine body through the entry / exit interval to the fault trolley storage platform outside the sintering machine body;

[0024] S4, control the lifting assembly to run directly above the new trolley, and use the lifting assembly to lift the new trolley from outside the sintering machine body through the inlet / outlet gap into the sintering machine body, and then start the sintering machine body.

[0025] Preferably, the entry / exit interval has a first extreme position near the first external pressure rail section and a second extreme position near the second external pressure rail section, wherein the first extreme position is obtained through the following steps:

[0026] Determine the direction of the supporting force of the first external pressure rail section on the wheels of the sintering machine trolley running on the head star wheel;

[0027] Determine the critical state corresponding to when the direction of the supporting force just changes from the inclined direction to the vertical upward, and take the position of the rear end face of the sintering machine trolley in the critical state as the first limit position;

[0028] The second extreme position is obtained through the following steps:

[0029] Historical operating data of multiple sintering machine trolleys operating in the head area of ​​the sintering machine body are obtained, and the gap width between two adjacent sintering machine trolleys is determined based on the historical operating data.

[0030] When the gap width is decreasing from large to small and the gap width is a preset threshold, the position corresponding to the front end of the sintering machine trolley running in this state is taken as the second extreme position.

[0031] Preferably, the preset threshold is set to 5mm.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention provides a head bend assembly, a head replacement system and method for sintering machine trolleys, which have the following advantages: (1) Simple structure and low cost equipment; the modification only requires converting the original bend into a semi-open bend. (2) It can realize the replacement of trolleys with material. Compared with the existing replacement method, the trolley replacement efficiency is higher and the impact on the quality of sintered ore is smaller. It does not require special shutdown and emptying of the faulty trolley and its front and rear trolleys. By adopting the semi-open head bend of this application, the trolley replacement time can be shortened, the process can be simplified, and the downtime replacement time of a single trolley can be controlled within 5 minutes, thus reducing the impact on sintering production. It improves the operating rate of the sintering machine and enhances the quality of sintered ore. (3) It can be implemented by modifying the existing sintering machine. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the head bend assembly in one embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure in normal operation state according to an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of trolley replacement and hoisting in one embodiment of the present invention;

[0038] Figure 4 for Figure 3 Enlarged diagram of point A in the diagram;

[0039] Figure 5 This is a schematic diagram of the trolley passing through the first external pressure rail section in one embodiment of the present invention;

[0040] Figure 6 for Figure 5 The N-direction view in the middle;

[0041] Figure 7 This is a schematic diagram of the trolley clamping assembly before clamping in one embodiment of the present invention;

[0042] Figure 8 This is a schematic diagram of the trolley clamping assembly after clamping in one embodiment of the present invention;

[0043] Figure 9 This is one of the structural schematic diagrams of the trolley clamping assembly in one embodiment of the present invention;

[0044] Figure 10 This is a second schematic diagram of the trolley clamping assembly in one embodiment of the present invention;

[0045] Figure 11 This is a force analysis diagram of the sintering machine trolley on the head star wheel in one embodiment of the present invention.

[0046] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0047] Explanation of icon numbers:

[0048] 10. Head curve assembly; 110. First outer pressure rail section; 111. First curved section; 1111. First inclined plane; 112. Second horizontal section; 120. Second outer pressure rail section; 121. Second inclined plane; 130. Pressure roller space; 140. Inlet / outlet interval; 141. First extreme position; 142. Second extreme position; 150. Inner pressure rail section; 151. Second curved section; 152. First horizontal section; 153. Third horizontal section; 1533, Third inclined plane; 20, Lifting device assembly; 210, Lifting rail; 221, Tractor; 222, Wire rope; 223, Hook; 230, Trolley clamping assembly; 231, Sleeve; 232, U-shaped pin; 233, First hook; 234, Second hook; 30, New trolley; 40, Trolley to be replaced; 50, Sintering machine trolley; 510, Wheels of sintering machine trolley; 60, Head star wheel. Detailed Implementation

[0049] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0051] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0052] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0053] As those skilled in the art will know, sintering of mineral powder is an important step in the metallurgical industry. After various mineral powders are mixed in a certain proportion and sintered, they can achieve sufficient strength and particle size, improve the blast furnace utilization coefficient, reduce the coke ratio, increase the blast furnace air intake, and enable the materials in the blast furnace to burn completely. However, the sintering machine trolley 50 operates in a high-temperature environment for a long time, and its various components, such as grate bars and wheel bearings, are very susceptible to damage. Therefore, it is necessary to frequently replace damaged trolleys.

[0054] Please see the appendix Figures 1 to 10 A head bend assembly 10 provided in one embodiment of the present invention includes a first outer pressure rail section 110, a second outer pressure rail section 120, and an inner pressure rail section 150 disposed at the head of a sintering machine. The first outer pressure rail section 110 and the second outer pressure rail section 120 are both disposed outside the inner pressure rail section 150.

[0055] A pressure wheel space 130 matching the wheels 510 of the sintering machine trolley is formed between the first outer pressure rail section 110 and the inner pressure rail section 150, and between the second outer pressure rail section 120 and the inner pressure rail section 150; an entry / exit interval 140 for the sintering machine trolley 50 to be hoisted in or out is provided between the first outer pressure rail section 110 and the second outer pressure rail section 120.

[0056] The second external pressure rail section 120 extends along the horizontal progress direction of the sintering machine. The first external pressure rail section 110 includes a first curved section 111 that matches the head star wheel 60 of the sintering machine. The internal pressure rail section 150 includes a second curved section 151 that is parallel and spaced apart from the first curved section 111, and a first horizontal section 152 that is parallel and spaced apart from the second external pressure rail section 120. The horizontal progress direction is the direction of the horizontal forward section at the top of the sintering machine. The second external pressure rail section 120 is necessary because when the sintering machine trolley 50 disengages from the toothed plate of the head star wheel 60, the force exerted by the toothed plate is not horizontal. Under the thrust of the front trolley, this can cause the sintering machine trolley 50 to arch. The second external pressure rail section 120 acts as a pressure rail, controlling the arching of the sintering machine trolley 50 within a certain range.

[0057] It is worth noting that, compared with the conventional head bend of a sintering machine, the head bend assembly 10 provided in this application divides the outer rail of the sintering machine head bend into two independent sections, leaving space between the two sections for hoisting the sintering machine trolley 50 (i.e., an entry / exit interval of 140). This allows for easy hoisting of the faulty trolley and loading of the new trolley 30 for replacement. By removing part of the sintering machine head outer rail and adopting a semi-open head bend, the time for replacing a single faulty trolley in a conventional sintering machine can be reduced from 2 hours to about 5 minutes, saving 10-20 minutes of downtime. The operation is simple, the replacement efficiency is high, and the impact on sintering machine production is minimal.

[0058] In a preferred embodiment, the access gap 140 is located at the top of the inner pressure rail section 150, and the size of the access gap 140 matches the distance between the two wheels on one side of the sintering machine trolley 50. Specifically, since only the wheels 510 of the sintering machine trolley are within the pressure wheel space 130, when hoisting a faulty trolley, as long as the gap, i.e., the access gap 140, is greater than the width between the two wheels on one side of the sintering machine trolley 50, the faulty trolley can be hoisted out through the access gap 140 using the lifting assembly 20, and the gap does not need to be greater than the width of the sintering machine trolley 50.

[0059] Furthermore, the first curved section 111 has a first inclined surface 1111 at one end near the second external pressure rail section 120 for guiding the wheels 510 of the sintering machine trolley out of the first curved section 111, and / or the second external pressure rail section 120 has a second inclined surface 121 at one end near the first curved section 111 for guiding the wheels 510 of the sintering machine trolley into the second external pressure rail section 120. By providing the first inclined surface 1111 and the second inclined surface 121, the sintering machine trolley 50 passes through this section more smoothly.

[0060] Furthermore, the first external pressure rail section 110 also includes a second horizontal section 112 extending along the horizontal return direction of the sintering machine. The second horizontal section 112 connects to the bottom end of the first curved section 111. The internal pressure rail section 150 also includes a third horizontal section 153 extending along the horizontal return direction of the sintering machine. The third horizontal section 153 connects to the second curved section 151. The third horizontal section 153 is parallel to and spaced apart from the second horizontal section 112, and is located inside the second horizontal section 112. At the end of the third horizontal section 153 away from the second curved section 151, a third inclined surface 1533 is formed to guide the wheels 510 of the sintering machine trolley into the third horizontal section 153. By setting the third inclined surface 1533, the sintering machine trolley 50 passes through this part more smoothly. The horizontal return direction of the sintering machine is the lower horizontal return direction, which is a position and direction well known to those skilled in the art, and therefore will not be described in detail here.

[0061] The present invention also provides a head replacement system for a sintering machine trolley, including the head bend assembly 10 as described above, a lifting device assembly 20, a sintering machine body (not shown in the figure), a new trolley 30 placed outside the sintering machine body, and a trolley 40 to be replaced running on the sintering machine body; wherein,

[0062] The sintering machine body includes a head star wheel assembly (not shown in the figure). The rotation of the head star wheel assembly drives the replacement trolley 40 to move synchronously, so that the wheels of the replacement trolley 40 move within the pressure wheel space 130.

[0063] The head bend assembly 10 is matched with the head star wheel assembly in position. The lifting assembly 20 is used to lift the trolley to be replaced 40 from the sintering machine through the inlet / outlet interval 140 to the outside of the sintering machine, and to lift the new trolley 30 from the outside of the sintering machine through the inlet / outlet interval 140 into the sintering machine.

[0064] Workflow: When a faulty trolley (i.e., trolley 40 to be replaced) needs to be replaced, first prepare the new trolley 30 next to the replacement area, such as... Figure 3 As shown, when the faulty trolley reaches position 140 in the inlet / outlet interval, the sintering machine is stopped. At this point, the faulty trolley is in a free state, no longer in contact with the preceding and following trolleys. The lifting assembly can then lift the faulty trolley out, place it on the storage platform, and load the new trolley 30 from inlet / outlet interval 140. The sintering machine can then be restarted. Compared to other trolley replacement methods, head replacement takes 10-20 minutes, and the existing middle replacement process takes 2 hours, with a direct downtime of 15-25 minutes. This solution, however, reduces downtime to approximately 5 minutes, resulting in shorter processing time and higher efficiency.

[0065] like Figure 2 As shown, the sintering machine trolley 50 is pushed by the head star wheel 60. Due to the tooth shape of the head star wheel 60 and the curvature of the curve, only the sintering machine trolleys 50 entering and exiting the curve are close to each other. There is a certain gap of >20mm between the other two adjacent sintering machine trolleys 50.

[0066] In a preferred embodiment, the lifting assembly 20 includes a lifting rail 210 installed in the sintering plant, a lifting component (not shown) movably arranged along the extension direction of the lifting rail 210, and a trolley clamping assembly 230. The trolley clamping assembly 230 includes a sleeve 231, a U-shaped pin 232, and a first hook 233 and a second hook 234 that match the wheels 510 of the sintering machine trolley.

[0067] Both the first hook 233 and the second hook 234 have through holes (not shown in the figure) for the sleeve 231 to pass through, and both the first hook 233 and the second hook 234 can be rotatably connected to the sleeve 231;

[0068] The first hook 233 has a first through hole (not shown in the figure) through which one end of the U-shaped pin 232 passes, and the second hook 234 has a second through hole (not shown in the figure) through which the other end of the U-shaped pin 232 passes; wherein, after the U-shaped pin 232 is inserted into the first through hole and the second through hole, the distance between the first hook 233 and the second hook 234 matches the distance between the two wheels on one side of the sintering machine trolley 50, so as to clamp the sintering machine trolley 50;

[0069] The lifting end of the lifting assembly (e.g., the hook part of the crane) is connected to the sleeve 231 to lift the trolley 40 to be replaced out of the main body of the sintering machine trolley 50 or to lift the new trolley 30 into the main body of the sintering machine.

[0070] Specifically, during clamping, simply remove the U-shaped pin 232, place the first hook 233 and the second hook 234 under the wheel 510 of the sintering machine trolley, and then insert the U-shaped pin 232 into the corresponding first and second through holes to complete the clamping. This clamping method is faster and more convenient than the ordinary method of using a wire rope 222 to hang the wheel. The first hook 233 and the second hook 234 can rotate around the sleeve 231, thus allowing them to be easily inserted into the lower part of the wheel 510 of the sintering machine trolley during the replacement of the sintering machine trolley 50.

[0071] Furthermore, the lifting assembly includes a trolley 221, a wire rope 222, and a hook 223. The trolley 221 is movably mounted along the extension direction of the lifting rail 210. The wire rope 222 is wound around the trolley 221 and its length is extendable. The hook 223 is connected to the wire rope 222. The hook 223 is hooked inside and connected to the sleeve 231. The hook of the trolley 221 is attached to the sleeve 231. Compared with other clamping methods, this clamping tool is more efficient and simpler.

[0072] The present invention also provides a method for changing the head of a sintering machine trolley, applied to the head changing system of the sintering machine trolley as described above, comprising the following steps:

[0073] S1. Identify the trolley 40 to be replaced and prepare the new trolley 30 next to the area to be replaced; see appendix for details. Figure 3 As shown.

[0074] S2, when all the wheels of the trolley to be replaced 40 are in the inlet / outlet interval 140, the main body of the sintering machine is stopped; when all the wheels are in the inlet / outlet interval 140, it is convenient for the lifting assembly 20 to lift them.

[0075] S3, control the lifting assembly 20 to run directly above the inlet / outlet interval 140, and use the lifting assembly 20 to lift the trolley to be replaced 40 from the sintering machine body through the inlet / outlet interval 140 to the fault trolley storage platform outside the sintering machine body;

[0076] S4, control the lifting assembly 20 to run directly above the new trolley 30, and use the lifting assembly 20 to lift the new trolley 30 from outside the sintering machine body through the inlet / outlet interval 140 into the sintering machine body, and then start the sintering machine body.

[0077] In a preferred embodiment, the entry / exit interval 140 has a first extreme position 141 near the first external pressure rail section 110 and a second extreme position 142 near the second external pressure rail section 120, wherein the first extreme position 141 is obtained through the following steps:

[0078] Determine the direction of the supporting force of the first external pressure rail section 110 on the wheels 510 of the sintering machine trolley running on the head star wheel 60;

[0079] Determine the critical state corresponding to when the direction of the supporting force just changes from the inclined direction to the vertical upward, and take the position of the rear end face of the sintering machine trolley 50 in the critical state as the first limit position 141;

[0080] It should be noted that, in order to prevent the sintering machine trolley 50 from tipping backward due to gravity during the lifting process when it is located at the inlet / outlet interval 140, this example determines the critical state corresponding to when the direction of the support force just changes from the inclined direction to the vertical upward, and takes the position of the rear end face of the sintering machine trolley 50 in this critical state as the first limit position 141; in this state, the tilting torque of gravity and the head star wheel on the wheels 510 of the sintering machine trolley is in the clockwise direction, so the sintering machine trolley 50 will not tip backward.

[0081] The second extreme position 142 is obtained through the following steps:

[0082] Historical operating data of multiple sintering machine trolleys 50 running in the head area of ​​the sintering machine body are obtained, and the gap width between two adjacent sintering machine trolleys 50 is determined based on the historical operating data.

[0083] When the gap width decreases from large to small, and the gap width reaches a preset threshold, the position corresponding to the front end of the sintering machine trolley 50 running in this state is designated as the second extreme position 142. As a preferred example, the preset threshold is set to 5mm.

[0084] It is worth noting that, in order to ensure the smooth lifting of the replacement trolley 40, it needs to be lifted when the replacement trolley 40 and the adjacent sintering machine trolley 50 are not in contact (free state). In this embodiment, the second extreme position 142 is defined as the position corresponding to the front end of the sintering machine trolley 50 running in this state when the gap width gradually decreases and the gap width is at a preset threshold. In this state, the replacement trolley 40 is in a free state, which facilitates the quick lifting by the lifting assembly 20 and ensures smooth lifting in and out.

[0085] As another preferred embodiment of the present invention, such as Figure 11 As shown, B is the contact point between the inner pressure track section 150 and the front wheel of the sintering machine trolley 50; C is the center of gravity of the sintering machine trolley 50; D is the contact point between the inner pressure track section 150 and the rear wheel of the sintering machine trolley 50; and E is the point where the toothed plate of the head star wheel 60 exerts force on the front wheel of the sintering machine trolley 50. H1 is the horizontal distance between points C and D; H2 is the radial distance between points E and D along the track; and H3 is the horizontal distance between points B and D. Under the influence of gravity G, the rear wheels of the sintering machine trolley 50 land on the inner pressure rail section 150 (point D in the figure). When the sintering machine trolley 50 moves at a constant speed, the front wheels of the sintering machine trolley 50 may be on the inner pressure rail section 150 or the first outer pressure rail section 110. With point D as the origin, the gravity G of the sintering machine trolley 50 generates a reversing torque around point D (may be clockwise or counterclockwise in different states). With point D as the origin, the toothed plate driving force F of the head star wheel 60 generates a reversing torque around point D (may be counterclockwise or clockwise in different states).

[0086] When the sintering machine trolley 50 passes the first limit position 141, the gravity G generates a clockwise torque GH1 > 0, and at the same time, the clockwise torque FH2 generated by the toothed plate of the head star wheel 60 is also 0. PH3 is needed to balance the torque. P is the force exerted by the inner pressure rail section 150 on the front wheel 510 of the sintering machine trolley.

[0087] At this point, GH1 + FH2 = PH3;

[0088] At this point, P must be greater than 0, meaning that the front wheel of the sintering machine trolley 50 falls on the inner track. That is, the first extreme position 141 is the critical position where the front wheel of the sintering machine trolley 50 moves from the first external pressure track section 110 to the inner pressure track section 150.

[0089] The first limit position 141 determined in this embodiment can ensure that the sintering machine trolley 50 will not flip backward due to its own weight when it is lifted out. At the same time, the first limit position 141 determined in this way has a larger range than the limit position determined by the supporting force method mentioned above.

[0090] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A head-bending assembly, characterized in that, It includes a first external pressure rail section, a second external pressure rail section, and an inner pressure rail section located at the head of the sintering machine, wherein the first external pressure rail section and the second external pressure rail section are both located outside the inner pressure rail section; wherein, A pressure wheel space matching the wheels of the sintering machine trolley is formed between the first outer pressure rail section and the inner pressure rail section, as well as between the second outer pressure rail section and the inner pressure rail section; an entry / exit interval for the sintering machine trolley to be hoisted in or out is provided between the first outer pressure rail section and the second outer pressure rail section. The second external pressure rail section extends along the horizontal progress direction of the sintering machine. The first external pressure rail section includes a first curved section that matches the head star wheel of the sintering machine. The internal pressure rail section includes a second curved section that is parallel and spaced apart from the first curved section, and a first horizontal section that is parallel and spaced apart from the second external pressure rail section. The entry / exit interval is located at the top of the inner pressure rail section, and the size of the entry / exit interval matches the distance between the two wheels on one side of the sintering machine trolley.

2. The head curve assembly according to claim 1, characterized in that, The first curved section has a first inclined surface at one end near the second external pressure rail section for guiding the wheels of the sintering machine trolley out of the first curved section, and / or the second external pressure rail section has a second inclined surface at one end near the first curved section for guiding the wheels of the sintering machine trolley into the second external pressure rail section.

3. The head curve assembly according to claim 1, characterized in that, The first external pressure rail section also includes a second horizontal section extending along the horizontal return direction of the sintering machine. The second horizontal section is connected to the bottom end of the first curved section. The internal pressure rail section also includes a third horizontal section extending along the horizontal return direction of the sintering machine. The third horizontal section is connected to the second curved section. The third horizontal section is parallel to and spaced apart from the second horizontal section and is located inside the second horizontal section. At the end of the third horizontal section away from the second curved section, a third inclined surface is formed to guide the wheels of the sintering machine trolley into the third horizontal section.

4. A head replacement system for a sintering machine trolley, characterized in that, The assembly includes the head bend assembly as described in any one of claims 1-3, and further includes a lifting device assembly, a sintering machine body, a new trolley placed outside the sintering machine body, and a replacement trolley running on the sintering machine body; wherein, The sintering machine body includes a head star wheel assembly. The rotation of the head star wheel assembly drives the trolley to be replaced to move synchronously, so that the wheels of the trolley to be replaced move within the pressure wheel space. The head bend assembly is matched with the head star wheel assembly in position. The lifting assembly is used to lift the trolley to be replaced from the sintering machine through the inlet / outlet interval to the outside of the sintering machine, and to lift the new trolley from the outside of the sintering machine through the inlet / outlet interval into the sintering machine.

5. The head replacement system for the sintering machine trolley according to claim 4, characterized in that, The lifting assembly includes a lifting rail installed in the sintering plant, a lifting component movably arranged along the extension direction of the lifting rail, and a trolley clamping assembly. The trolley clamping assembly includes a sleeve, a U-shaped pin, and a first hook and a second hook that match the wheels of the sintering machine trolley. Both the first hook and the second hook have through holes for the sleeve to pass through, and both the first hook and the second hook can be rotatably connected to the sleeve; The first hook has a first through hole through which one end of the U-shaped pin passes, and the second hook has a second through hole through which the other end of the U-shaped pin passes; wherein, after the U-shaped pin is inserted into the first through hole and the second through hole, the interval between the first hook and the second hook matches the interval between the two wheels on one side of the sintering machine trolley, so as to clamp the sintering machine trolley; The lifting assembly's hanging end is connected to the sleeve to lift the trolley to be replaced out of the sintering machine trolley body or to lift the new trolley into the sintering machine body.

6. The head replacement system for the sintering machine trolley according to claim 5, characterized in that, The lifting assembly includes a trolley, a wire rope, and a hook. The trolley is movable along the extension direction of the lifting rail. The wire rope is wound around the trolley and its length is extendable. The hook is connected to the wire rope. The hook is hooked inside the sleeve and connected to the sleeve.

7. A method for changing the head of a sintering machine trolley, applied to the head changing system of the sintering machine trolley as described in any one of claims 4-6, characterized in that, Including the following steps: S1. Identify the trolley to be replaced and prepare the new trolley next to the area to be replaced; S2, when all the wheels of the trolley to be replaced are in the in-out interval, control the sintering machine body to stop; S3, control the lifting assembly to run directly above the entry / exit interval, and use the lifting assembly to lift the trolley to be replaced from the sintering machine body through the entry / exit interval to the fault trolley storage platform outside the sintering machine body; S4, control the lifting assembly to run directly above the new trolley, and use the lifting assembly to lift the new trolley from outside the sintering machine body through the inlet / outlet gap into the sintering machine body, and then start the sintering machine body.

8. The method for changing the head of the sintering machine trolley according to claim 7, characterized in that, The entry / exit interval has a first extreme position close to the first external pressure rail section and a second extreme position close to the second external pressure rail section, wherein the first extreme position is obtained through the following steps: Determine the direction of the supporting force of the first external pressure rail section on the wheels of the sintering machine trolley running on the head star wheel; Determine the critical state corresponding to when the direction of the supporting force just changes from the inclined direction to the vertical upward, and take the position of the rear end face of the sintering machine trolley in the critical state as the first limit position; The second extreme position is obtained through the following steps: Historical operating data of multiple sintering machine trolleys operating in the head area of ​​the sintering machine body are obtained, and the gap width between two adjacent sintering machine trolleys is determined based on the historical operating data. When the gap width is decreasing from large to small and the gap width is a preset threshold, the position corresponding to the front end of the sintering machine trolley running in this state is taken as the second extreme position.

9. The method for changing the head of the sintering machine trolley according to claim 8, characterized in that, The preset threshold is set to 5mm.

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