Anti-blocking fire grate structure

Abstract

The utility model discloses an anti-blocking fire grate structure which comprises two transmission shafts which are symmetrically arranged, two ends of each transmission shaft are respectively provided with a transmission wheel, a plurality of fire grate segments which are connected with one another in a chain mode are arranged around the transmission wheels on the two sides, and a plurality of gear teeth are arranged on the circumferential end faces of the transmission wheels at intervals. Gear holes corresponding to the gear teeth are formed in the two sides of each fire grate segment, every two adjacent fire grate segments are connected through a pin shaft, a cleaning assembly is arranged between the two transmission shafts and comprises an eccentric wheel and a cleaning block, the eccentric wheel is in transmission connection with the transmission shaft on one side, and the cleaning block is in transmission connection with the transmission shaft on the other side. The cleaning block is arranged at the bottom of the eccentric wheel and located above the lower side fire grate segment. The cleaning mechanism is synchronously connected with the transmission shaft, and the cleaning block enters and exits the ventilation opening in a reciprocating manner in the operation process of the fire grate segment, so that ash or other impurities clamped in the ventilation opening are cleaned, the fire grate segment is prevented from being blocked, and the production efficiency of a boiler is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grate, in particular to an anti-blocking grate structure. Background Art

[0002] A grate is a component in a boiler or industrial furnace for stacking solid fuels (such as coal or biomass, etc.) and enabling them to burn effectively. The entire grate mainly includes a frame and grate bars. The grate bars are usually made of cast iron. After assembly, there are necessary ventilation gaps between the bars.

[0003] To ensure the ventilation effect, a number of ventilation openings are usually provided on the grate bars. Ash or unburned parts generated after the solid fuel burns sometimes get stuck at the ventilation openings, narrowing or completely blocking the ventilation openings, thereby affecting the ventilation effect and further causing insufficient fuel combustion. Therefore, the grate bars need to be cleaned regularly. Currently, mainly manual cleaning with tools is adopted. During cleaning, the furnace needs to be stopped, and it can only be cleaned after the furnace chamber cools down. Waiting for the furnace chamber to cool down takes a lot of time. Therefore, this cleaning method has extremely low efficiency and seriously affects the normal production progress.

[0004] Therefore, if the grate blockage can be fundamentally eliminated, the current situation will be effectively improved, thereby improving the production efficiency of the boiler. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model discloses an anti-blocking grate structure, which includes two symmetrically arranged transmission shafts. Each end of each transmission shaft is provided with a transmission wheel. A number of grate bars connected to each other in the form of a chain are arranged around the transmission wheels on both sides. A number of teeth are spaced on the circumferential end surface of the transmission wheel. Tooth holes corresponding to the teeth are provided on both sides of the grate bar. Each adjacent two grate bars are connected by a pin shaft. A cleaning component is provided at the position between the two transmission shafts. The cleaning component includes an eccentric wheel and a cleaning block. The eccentric wheel is in transmission connection with one of the transmission shafts. The cleaning block is arranged at the bottom of the eccentric wheel and above the lower grate bar. Driven by the eccentric wheel, the cleaning block reciprocates in and out of the ventilation opening of the grate bar.

[0006] Further, the cleaning component further includes a movable plate, a positioning plate, a guide rod and a return spring. The movable plate is arranged at the bottom of the eccentric wheel and is movably connected thereto. The positioning plate is fixedly arranged below the movable plate. The upper end of the cleaning block is fixedly connected to the bottom of the movable plate, and the lower end movably penetrates through the first through hole on the positioning plate. The guide rods are arranged on both sides of the cleaning block and the lower ends are fixedly connected to the positioning plate, and the upper ends movably penetrate through the second through holes on the movable plate. The return spring is sleeved outside the guide rod and is respectively connected to the movable plate and the positioning plate at both ends.

[0007] Further, a first sprocket is provided on the transmission shaft, a second sprocket is provided on the eccentric wheel, and the first sprocket and the second sprocket are connected by a chain drive.

[0008] Further, two rows of ventilation openings are provided on the grate plate, and reinforcing ribs are provided between the two rows of ventilation openings.

[0009] Further, two protruding connecting blocks are provided at one end of the grate plate, two grooves are provided at the other end, through connecting holes are provided on the side walls of the connecting blocks and the grooves, the connecting block of one of the grate plates is arranged in the groove of the adjacent grate plate, and the two are rotatably connected by a pin shaft.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] The anti-blocking grate structure of the present utility model is synchronously connected with the transmission shaft through the cleaning mechanism. During the operation of the grate plate, the cleaning block reciprocates in and out of the ventilation opening, thereby cleaning the ash or other impurities stuck in the ventilation opening, preventing the grate plate from being blocked, and thus eliminating the subsequent process of cleaning the grate plate, which not only reduces the labor intensity of the staff but also improves the production efficiency of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 It is a side view structure diagram of the present utility model;

[0014] Figure 2 It is a top view structure diagram of the present utility model;

[0015] Figure 3 It is a connection schematic diagram of the grate plate in the present utility model;

[0016] Figure 4 It is a structure schematic diagram of the cleaning assembly in the present utility model.

[0017] Reference numerals:

[0018] 1 - transmission shaft, 2 - transmission wheel, 21 - teeth, 3 - grate plate, 31 - tooth holes, 32 - ventilation openings, 33 - reinforcing ribs, 34 - connecting blocks, 35 - grooves, 36 - connecting holes, 37 - pin shafts, 4 - eccentric wheel, 5 - cleaning block, 6 - movable plate, 7 - positioning plate, 8 - guide rod, 9 - return spring, 10 - first sprocket, 11 - second sprocket, 12 - chain. Detailed implementation mode

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indication will also change accordingly.

[0021] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0022] In the description of the embodiments, unless otherwise clearly specified and limited, terms such as "set", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or connected through an intermediate medium, or the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] As Figure 1-2 described, the anti-blocking grate structure in this embodiment includes two symmetrically arranged transmission shafts 1. At each end of each transmission shaft 1, a transmission wheel 2 is provided. A number of grate plates 3 connected to each other in the form of a chain are arranged around the transmission wheels 2 on both sides. A number of teeth 21 are arranged at intervals on the circumferential end surface of the transmission wheel 2. Tooth holes 31 corresponding to the teeth 21 are provided on both sides of the grate plate 3.

[0024] As Figure 3 shown, two rows of ventilation openings 32 are provided on the grate plate 3. A reinforcing rib 33 is provided between the two rows of ventilation openings 32. Two protruding connecting blocks 34 are provided at one end of the grate plate 3, and two grooves 35 are provided at the other end. Through holes 36 are provided on the side walls of the connecting blocks 34 and the grooves 35. The connecting block 34 of one grate plate 3 is arranged in the groove 35 of the adjacent grate plate 3, and the two are rotatably connected through a pin shaft 37.

[0025] A cleaning assembly is provided between the two transmission shafts 1, and the cleaning assembly includes an eccentric wheel 4, a cleaning block 5, a movable plate 6, a positioning plate 7, a guide rod 8 and a reset spring 9. A first sprocket 10 is provided on the transmission shaft 1, and a second sprocket 11 is provided on the eccentric wheel 4. The first sprocket 10 and the second sprocket 11 are connected by a chain 12, so that the eccentric wheel 4 is driven to be synchronously connected by the transmission shaft 1.

[0026] The movable plate 6 is arranged at the bottom of the eccentric wheel 4 and the two are movably connected, the positioning plate 7 is fixedly arranged below the movable plate 6, the upper end of the cleaning block 5 is fixedly connected to the bottom of the movable plate 6, and the lower end movably passes through the first through hole on the positioning plate 7, the guide rod 8 is arranged on both sides of the cleaning block 5 and the lower end is fixedly connected to the positioning plate 7, and the upper end movably passes through the second through hole on the movable plate 6, and the reset spring 9 is sleeved on the outside of the guide rod 8 and the two ends are respectively connected to the movable plate 6 and the positioning plate 7.

[0027] like Figure 4 As shown, when the distal end of the eccentric wheel 4 moves to the lower side, the movable plate 6 and the cleaning block 5 are pushed downward, and the cleaning block 5 enters the vent 32 of the grate plate 3 to push out the ash or other impurities in the vent 32; wherein, the size of the cleaning block 5 is smaller than the size of the vent 32, and the transmission ratio of the first sprocket 10 and the second sprocket 11 is set to ensure that the cleaning block 5 moves up and down once for each distance of moving one grate plate 3.

[0028] The anti-clogging grate structure of the utility model realizes synchronous clearing of blockages during the furnace burning process, eliminating the subsequent process of cleaning the grate pieces separately, which not only reduces the labor intensity of the staff, but also improves the production efficiency of the boiler.

[0029] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement; when the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the utility model.

Claims

1. An anti-clogging grate structure, characterized in that: The invention comprises two symmetrically arranged transmission shafts, each of which is provided with a transmission wheel at both ends, a plurality of grate plates connected to each other in the form of chains are provided around the transmission wheels on both sides, a plurality of gear teeth are provided at intervals on the circumferential end faces of the transmission wheels, tooth holes corresponding to the gear teeth are provided on both sides of the grate plates, each adjacent two grate plates are connected by a pin shaft, a cleaning assembly is provided between the two transmission shafts, the cleaning assembly comprises an eccentric wheel and a cleaning block, the eccentric wheel is transmission-connected to the transmission shaft on one side, the cleaning block is provided at the bottom of the eccentric wheel and above the lower grate plate, and under the drive of the eccentric wheel, the cleaning block reciprocates in and out of the vent of the grate plate.

2. The anti-clogging grate structure according to claim 1, characterized in that: The cleaning assembly also includes a movable plate, a positioning plate, a guide rod and a return spring. The movable plate is arranged at the bottom of the eccentric wheel and the two are movably connected. The positioning plate is fixedly arranged below the movable plate. The upper end of the cleaning block is fixedly connected to the bottom of the movable plate, and the lower end movably passes through the first through hole on the positioning plate. The guide rod is arranged on both sides of the cleaning block and the lower end is fixedly connected to the positioning plate, and the upper end movably passes through the second through hole on the movable plate. The return spring is sleeved on the outside of the guide rod and the two ends are respectively connected to the movable plate and the positioning plate.

3. The anti-clogging grate structure according to claim 1, characterized in that: The transmission shaft is provided with a first sprocket, the eccentric wheel is provided with a second sprocket, and the first sprocket is connected with the second sprocket through chain transmission.

4. The anti-clogging grate structure according to claim 1, characterized in that: Two rows of vents are arranged on the grate plate, and reinforcing ribs are arranged between the two rows of vents.

5. The anti-clogging grate structure according to claim 4, characterized in that: The grate plate is provided with two protruding connection blocks at one end and two grooves at the other end. The connection blocks and the side walls of the grooves are both provided with penetrating connection holes. The connection blocks of one of the grate plates are arranged in the groove of the adjacent grate plate, and the two are rotatably connected by a pin shaft.

Images