Movable fire grate structure of steam boiler

Abstract

The movable fire grate structure of the steam boiler comprises a boiler body, a supporting frame plate is installed in a combustion chamber of the boiler body, and a sliding rod is welded to the inner side of the supporting frame plate. According to the boiler, the supporting frame plate is installed in the combustion chamber of the boiler body, the fire grate plate is movably arranged on the top face of the supporting frame plate, the motor drives the cam at the output end of the motor to rotate along with work of the motor, the contact block is fixed to the end of the connecting rod on the side face of the fire grate plate, and the surface of one side of the contact block abuts against the cam; the surface of the other side of the contact block is connected with the outer wall of the boiler body through a spring, the oval cam pushes the fire grate plate in a reciprocating mode in the rotating stage, the contact block is kept making contact with the cam all the time under the action of the telescopic characteristic of the spring, and on the basis, a guide lug arranged on the bottom face of the fire grate plate and a sliding rod on the inner side of a supporting frame plate slide; the grate plate accelerates discharge of ash on the surface of the grate plate in the reciprocating motion stage.

Description

Technical Field

[0001] This utility model relates to the field of steam boiler technology, and in particular to a movable grate structure for a steam boiler. Background Technology

[0002] Currently, when using biomass fuel to heat steam boilers, the biomass fuel is placed on the grate plate inside the steam boiler for combustion to heat the water tank.

[0003] A search revealed that application number CN202021033360.9 discloses a boiler grate, including a drive shaft, a support on one side of the drive shaft, and a driven shaft on the side of the support away from the drive shaft. Identical ash hoppers are fixedly connected at equal intervals to the lower end of the support. Chains are installed on the outer sides of both the drive and driven shafts. A fuel hopper is located above the middle of one side of each grate bar. A slag baffle is installed on the top outer side of each grate bar on the driven shaft side. The grate bars are housed within a casing. A first air inlet is located at the bottom of one side of the casing, and a second air inlet is located at the bottom of the other side of the casing. In this invention, the dual air inlets and the serrated surface of the grate bars increase the contact between fuel and air, ensuring complete combustion, saving fuel, and improving combustion efficiency. When the ash hopper is full, simply open the door and pull out the ash hopper to remove the ash. This convenient operation saves labor and is worthy of promotion.

[0004] However, during the use of the grate device of the aforementioned steam boiler, since the grate plate is a fixed structure, the ash removal efficiency of the grate plate is low, which can easily cause the ash removal groove on the grate plate to become blocked, affecting the combustion efficiency of the biomass fuel on it, and causing the biomass fuel to fail to burn completely.

[0005] To address this issue, a movable grate structure for a steam boiler is proposed, which has the advantage of facilitating ash removal through grate movement, thereby solving the problems mentioned in the background technology. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a movable grate structure for a steam boiler.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a movable grate structure for a steam boiler, comprising a boiler body, a support frame plate installed in the combustion chamber of the boiler body, and a sliding rod welded to the inner side of the support frame plate, a grate plate attached to the top surface of the support frame plate, and a guide lug for engaging with the sliding rod on the bottom surface of the grate plate, a connecting rod fixed to the side of the grate plate, and a contact block fixed to one end of the connecting rod extending to the outside of the boiler body, a spring installed on the side of the contact block facing the boiler body, the spring being connected to the outer wall of the boiler body, a mounting base welded to the outer wall of the boiler body, and a motor fixed to the top surface of the mounting base, a cam fixed to the output end of the motor, the cam abutting against the side of the contact block away from the connecting rod, and a furnace opening corresponding to the grate plate on the outer wall of the boiler body.

[0008] As a further description of the above technical solution: the grate plate is a disc-shaped structure, and the surface of the grate plate is evenly provided with a number of strip-shaped holes.

[0009] As a further description of the above technical solution: two sliding rods are arranged parallel to each other on the inner side of the support frame plate, and two guide ears are welded to the bottom surface of the grate plate corresponding to the sliding rods.

[0010] As a further description of the above technical solution: several connecting rods are fixed parallel to the side of the grate plate, and one end of each connecting rod is connected to a contact block.

[0011] As a further description of the above technical solution: the cam is an elliptical structure, and the side of the cam contacts the contact block. A positioning cylinder is welded to one end of the contact block facing the cam, and the positioning cylinder extends to the inside of the spring.

[0012] As a further description of the above technical solution: the support frame plate is an overall ring structure, and the surface of the support frame plate is uniformly provided with through holes, and the slide rod is installed on the inner ring of the support frame plate.

[0013] This utility model has the following beneficial effects:

[0014] In this invention, a support frame plate is installed in the combustion chamber of the boiler body, and a grate plate is movably installed on the top surface of the support frame plate. As the motor operates, the motor drives the cam at its output end to rotate. Since the end of the connecting rod on the side of the grate plate is fixed with a contact block, and one side surface of the contact block abuts against the cam, and the other side surface of the contact block is connected to the outer wall of the boiler body by a spring, the elliptical cam reciprocates and pushes the grate plate during the rotation phase. Under the action of the spring's extension and contraction characteristics, the contact block is always kept in contact with the cam. On this basis, a guide ear on the bottom surface of the grate plate slides with the sliding rod on the inner side of the support frame plate, so that the grate plate accelerates the discharge of ash on its surface during the reciprocating motion phase, thereby avoiding the blockage of the strip holes on the surface of the grate plate. This achieves the effect of facilitating grate movement for ash discharge and preventing blockage, and is also conducive to improving the combustion efficiency of boiler fuel. Attached Figure Description

[0015] Figure 1 This is an internal front view of the movable grate structure of a steam boiler according to the present invention;

[0016] Figure 2 This is an internal side view of the movable grate structure of a steam boiler according to the present invention;

[0017] Figure 3 This is a schematic diagram of the grate plate and cam structure of a movable grate structure for a steam boiler according to the present invention.

[0018] Legend:

[0019] 1. Boiler body; 2. Furnace opening; 3. Support frame plate; 4. Grate plate; 5. Connecting rod; 6. Guide ear; 7. Slide rod; 8. Mounting base; 9. Motor; 10. Cam; 11. Contact block; 12. Spring; 13. Strip hole; 14. Positioning cylinder. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] According to an embodiment of the present invention, a movable grate structure for a steam boiler is provided.

[0022] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-3As shown, a movable grate structure for a steam boiler according to an embodiment of the present invention includes a boiler body 1. A support frame plate 3 is installed in the combustion chamber of the boiler body 1, and a sliding rod 7 is welded to the inner side of the support frame plate 3. A grate plate 4 is attached to the top surface of the support frame plate 3, and a guide lug 6 that engages with the sliding rod 7 is provided on the bottom surface of the grate plate 4. A connecting rod 5 is fixed to the side of the grate plate 4, and a contact block 11 is fixed to one end of the connecting rod 5 extending to the outside of the boiler body 1. A spring 12 is installed on the side of the contact block 11 facing the boiler body 1, and the spring 12 is connected to the outer wall of the boiler body 1. A mounting base 8 is welded to the outer wall of the boiler body 1. The top surface of the mounting base 8 is fixed with a motor 9, and the output end of the motor 9 is fixed with a cam 10. The cam 10 abuts against the side of the contact block 11 away from the connecting rod 5. The outer wall of the boiler body 1 is provided with a furnace opening 2 corresponding to the grate plate 4. For the motor 9, the control method of this utility model is to control it by manually starting and stopping the switch. The wiring diagram of the power element and the power supply are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring arrangement will not be explained in detail. All parts of the boiler body 1 not mentioned are the same as the prior art or can be implemented by the prior art.

[0023] In one embodiment, the grate plate 4 is a disc-shaped structure, and a number of strip holes 13 are evenly opened on the surface of the grate plate 4. The grate plate 4 can be vibrated by manually striking the connecting rod 5, which makes it easy to clean the ash from the strip holes 13.

[0024] In one embodiment, two sliding rods 7 are arranged parallel to each other on the inner side of the support frame plate 3, and two guide ears 6 are welded to the bottom surface of the grate plate 4 corresponding to the sliding rods 7. The sliding rods 7 and guide ears 6 are arranged to maintain the stability of the movement of the grate plate 4.

[0025] In one embodiment, a plurality of connecting rods 5 are fixed parallel to the side of the grate plate 4, and one end of each of the connecting rods 5 is connected to the contact block 11. The connecting rods 5 facilitate the connection between the grate plate 4 and the contact block 11, and the connecting rods 5 serve as components to prevent heat conduction (they are made of ceramic fiber, zirconium-containing fiber or high-alumina fiber).

[0026] In one embodiment, the cam 10 is an elliptical structure, and the side of the cam 10 contacts the contact block 11. A positioning cylinder 14 is welded to one end of the contact block 11 facing the cam 10, and the positioning cylinder 14 extends to the inside of the spring 12. The cam 10 facilitates the reciprocating motion of the grate plate 4.

[0027] In one embodiment, the support frame plate 3 is an overall ring structure, and the surface of the support frame plate 3 is uniformly provided with through holes. The slide rod 7 is installed on the inner ring of the support frame plate 3. The support frame plate 3 with through holes throughout facilitates the discharge of scattered furnace ash and provides a support structure for the grate plate 4.

[0028] Working principle:

[0029] In use, the power supply of motor 9 is first turned on. When the boiler body 1 is discharging ash, the motor 9 on the mounting base 8 is started to work on the basis of the original ash discharge structure of the steam boiler. Motor 9 drives the cam 10 at its output end to rotate. Since the end of the connecting rod 5 on the side of the grate plate 4 is fixed with a contact block 11, and one side surface of the contact block 11 abuts against the cam 10, and the other side surface of the contact block 11 is connected to the outer wall of the boiler body 1 by a spring 12, the elliptical cam 10 pushes the grate plate 4 back and forth during the rotation stage, and the contact block 11 is always in contact with the cam 10 under the action of the extension and contraction characteristics of the spring 12. On this basis, the guide ear 6 on the bottom surface of the grate plate 4 slides with the slide rod 7 on the inner side of the support frame plate 3, so that the grate plate 4 reciprocates on the top surface of the support frame plate 3, so that the grate plate 4 accelerates the discharge of ash on its surface during the reciprocating motion stage, thereby avoiding the blockage of the strip hole 13 on the surface of the grate plate 4.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A movable grate structure for a steam boiler, comprising a boiler body (1), characterized in that: A support frame plate (3) is installed in the combustion chamber of the boiler body (1), and a sliding rod (7) is welded to the inner side of the support frame plate (3). A grate plate (4) is attached to the top surface of the support frame plate (3), and a guide ear (6) that engages with the sliding rod (7) is provided on the bottom surface of the grate plate (4). A connecting rod (5) is fixed to the side of the grate plate (4), and a contact block (11) is fixed to one end of the connecting rod (5) extending to the outside of the boiler body (1). The contact block (11) faces... A spring (12) is installed on one side of the boiler body (1), and the spring (12) is connected to the outer wall of the boiler body (1). An mounting base (8) is welded to the outer wall of the boiler body (1), and a motor (9) is fixed on the top surface of the mounting base (8). A cam (10) is fixed at the output end of the motor (9), and the cam (10) abuts against the side of the contact block (11) away from the connecting rod (5). A furnace opening (2) is opened on the outer wall of the boiler body (1) corresponding to the grate plate (4).

2. The movable grate structure of a steam boiler according to claim 1, characterized in that: The grate plate (4) is a disc-shaped structure, and a number of strip holes (13) are evenly opened on the surface of the grate plate (4).

3. The movable grate structure of a steam boiler according to claim 1, characterized in that: Two sliding rods (7) are arranged parallel to each other on the inner side of the support frame plate (3), and two guide ears (6) are welded to the bottom surface of the grate plate (4) corresponding to the sliding rods (7).

4. The movable grate structure of a steam boiler according to claim 1, characterized in that: The grate plate (4) has several connecting rods (5) fixed parallel to its side, and one end of each connecting rod (5) is connected to the contact block (11).

5. The movable grate structure of a steam boiler according to claim 1, characterized in that: The cam (10) is an elliptical structure, and the side of the cam (10) is in contact with the contact block (11). The end of the contact block (11) facing the cam (10) is welded with a positioning cylinder (14), and the positioning cylinder (14) extends to the inside of the spring (12).

6. The movable grate structure of a steam boiler according to claim 1, characterized in that: The support frame plate (3) is an overall ring structure, and the surface of the support frame plate (3) is uniformly provided with through holes. The slide rod (7) is installed on the inner ring of the support frame plate (3).

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