Device for improving coal supply stability of boiler

Abstract

The utility model relates to the technical field of boiler fire grate chain belts, and discloses a device for improving the coal supply stability of a boiler, which comprises a frame, a fire grate chain belt is rotatably arranged in the frame, a rotating speed sensor is arranged on the frame, a magnetic part is fixedly connected to the side edge of the fire grate chain belt, a positioning assembly is arranged between two side walls of the frame, and the positioning assembly is arranged on the frame. Wherein the positioning assembly abuts against a fire grate chain belt, and an installation protection assembly used for installing a rotating speed sensor is arranged on the positioning assembly; through the cooperation of the rotating speed sensor and the magnetic piece, the rotating speed of the fire grate chain belt can be monitored in real time, abnormity can be found in time, the positioning roller abuts against the fire grate chain belt, the fire grate chain belt can drive the magnetic piece to pass through a fixed position, and the positioning effect is achieved; therefore, the rotating speed sensor is always aligned with one of the fixed positions where the magnetic part passes, the rotating speed sensor and the magnetic part are prevented from deviating relatively due to equipment vibration and the like, and the coal supply stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler grate chain belts, and specifically relates to a device for improving the coal supply stability of a boiler. Background Technique

[0002] The stable operation of boiler coal supply depends on the coordinated operation of each component during the coal combustion process. In particular, the stable rotation of the grate chain is the basic condition to ensure the normal operation of the boiler.

[0003] When the grate chain is running, the chain grate often has an accident that the motor is still running, but the chain has stopped rotating due to various reasons, resulting in a reduction in the boiler operation load and even the shutdown of the boiler. To solve the above problems, we propose a device for improving the coal supply stability of a boiler. Content of the Utility Model

[0004] The purpose of the utility model is to provide a device for improving the coal supply stability of a boiler to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A device for improving the coal supply stability of a boiler, including a frame. A grate chain belt is rotatably arranged inside the frame. A rotational speed sensor is arranged on the frame. A magnetic part adapted to the rotational speed sensor is fixedly connected to the side of the grate chain belt. A positioning component for defining the travel trajectory of the magnetic part is arranged between the two side walls of the frame, wherein the positioning component is in contact with the grate chain belt, and an installation and protection component for installing the rotational speed sensor is arranged on the positioning component;

[0006] The installation and protection component includes a heat insulation protection housing and a protection cover. The rotational speed sensor is installed on the protection cover. A moving positioning part is arranged between the heat insulation protection housing and the protection cover.

[0007] According to the above technical solution, the positioning component includes a positioning roller in contact with the grate chain belt. A fixed shaft is movably arranged inside the frame. The positioning roller is rotatably arranged on the outer wall of the fixed shaft. A lifting component for moving the positioning roller is arranged on the outer wall of the frame. The end of the fixed shaft passes through the frame and is connected to the lifting component.

[0008] According to the above technical solution, the lifting component includes a mounting block fixed on the outer wall of the frame. A threaded rod is rotatably arranged on the mounting block. The threaded rod passes through the positioning roller and is threadedly connected thereto.

[0009] According to the above technical solution, the threaded rod passes through the mounting block. The mounting block is penetrated and threadedly connected with a locking bolt. The end of the locking bolt abuts against the outer wall of the threaded rod.

[0010] According to the above technical solution, a through groove for the fixed shaft to move is provided on the side wall of the frame, a guiding groove is provided on the top wall of the through groove, and a moving rod that slides in the guiding groove is fixedly connected to the outer wall of the fixed shaft.

[0011] According to the above technical solution, the moving positioning member includes a guide rod fixedly connected to the protective cover, a guide hole for the guide rod to slide is provided at the end of the heat insulation protective housing, and a plug block that is in plug-in fit with the inlet of the heat insulation protective housing is fixedly connected to the side wall of the protective cover.

[0012] According to the above technical solution, the plug block is a soft rubber block, and the plug block is in interference fit with the inner wall of the heat insulation protective housing.

[0013] According to the above technical solution, a mounting plate is fixedly connected to the side wall of the protective cover, a clamping groove for the rotation speed sensor to be inserted is provided at one end of the mounting plate, and a locking nut is screwed on the outer wall of the rotation speed sensor, and the locking nuts are respectively arranged on both sides of the mounting plate.

[0014] According to the above technical solution, a vacuum heat insulation cavity is provided inside the side wall of the heat insulation protective housing.

[0015] According to the above technical solution, a wave-transparent protective cover is embedded in the side wall of the heat insulation protective housing opposite to the magnetic member.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] Through the cooperation of the rotation speed sensor and the magnetic member provided in the present utility model, the rotation speed of the grate chain belt can be monitored in real time, abnormalities can be detected in a timely manner, the positioning roller of the positioning assembly abuts against the grate chain belt, and the rotating grate chain belt will be limited by the positioning assembly, so that the grate chain belt can drive the magnetic member to pass through a fixed position, achieving the positioning effect, and further enabling the rotation speed sensor to always align with one of the fixed positions where the magnetic member passes, preventing the relative deviation between the rotation speed sensor and the magnetic member due to reasons such as equipment vibration, and losing the detection effect, and improving the stability of coal supply.

[0018] By providing a lifting member for moving the positioning roller in the present utility model, the positioning roller can be lifted and moved, so as to tighten the grate chain belt, prevent the grate chain belt from becoming loose due to long-term use, affecting the stable operation of the grate chain belt, and at the same time prevent the grate chain belt from becoming loose, resulting in the relative deviation between the rotation speed sensor and the magnetic member, and losing the detection effect, and improving the stability of coal supply.

[0019] The utility model is provided with an installation protection component. A vacuum heat insulation cavity is arranged inside the side wall of the heat insulation protection shell. An insertion block is arranged on the side wall of the protection cover and inserted into the heat insulation protection shell. The protection cover and the heat insulation protection shell can form a sealed space to protect the rotational speed sensor therein, so as to protect and insulate the rotational speed sensor and prevent damage to the rotational speed sensor caused by external high temperature, further improving the stability of the device. Brief Description of the Drawings

[0020] Figure 1 is a schematic diagram of the coal supply system in the boiler of the utility model;

[0021] Figure 2 is a schematic diagram of the frame and the grate chain belt of the utility model;

[0022] Figure 3 is a connection diagram of the positioning component and the installation protection component of the utility model;

[0023] Figure 4 is a cross-sectional view of the installation protection component of the utility model;

[0024] Figure 5 is a schematic diagram of the grate chain belt in the boiler of the utility model.

[0025] In the figure:

[0026] 1. Frame; 2. Grate chain belt; 3. Rotational speed sensor; 4. Magnetic part; 5. Positioning component; 51. Positioning roller; 52. Fixed shaft; 53. Lifting part; 531. Installation block; 532. Threaded rod; 533. Locking bolt; 54. Through groove; 55. Guide groove; 56. Moving rod; 6. Installation protection component; 61. Heat insulation protection shell; 62. Protection cover; 63. Moving positioning part; 631. Guide rod; 632. Insertion block; 64. Installation plate; 65. Clamping groove; 66. Locking nut; 67. Wave-transparent protective cover; 611. Vacuum heat insulation cavity, 100. Boiler. Detailed Embodiment

[0027] 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 embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figures 1-5, the present utility model provides a technical solution for a device to improve the coal supply stability of a boiler: It includes a frame 1, and a grate chain belt 2 is rotatably arranged inside the frame 1. The frame 1 and the grate chain belt 2 are arranged at the bottom of the boiler 100, which is used to support the coal burning in the boiler to ensure that the coal can stay stably in the furnace during the combustion process, thereby maintaining a stable combustion state. A rotational speed sensor 3 is arranged on the frame 1, and a magnetic part 4 adapted to the rotational speed sensor 3 is fixedly connected to the side of the grate chain belt 2. The magnetic part 4 is a magnetic material block. When the grate chain belt 2 rotates, it will drive the magnetic part 4 to rotate, and the magnetosensitive element inside the rotational speed sensor 3 will output a pulse signal related to the rotation frequency, thereby measuring the rotational speed, which is used to monitor the rotational speed of the grate chain belt 2, ensure the normal operation of the grate and the combustion efficiency, and prevent the problem that the motor of the grate chain belt 2 is still running, but the grate chain belt 2 has stopped rotating, resulting in a reduction in the boiler operation load and even the shutdown of the boiler.

[0029] A positioning component 5 for defining the travel trajectory of the magnetic part 4 is arranged between the two side walls of the frame 1. Among them, the positioning component 5 is in contact with the grate chain belt 2. The rotating grate chain belt 2 will, under the limitation of the positioning component 5, enable the grate chain belt 2 to drive the magnetic part 4 to travel through a fixed position, achieving the positioning effect. Furthermore, the rotational speed sensor 3 will always be aligned with one of the fixed positions where the magnetic part 4 travels, preventing the relative deviation between the rotational speed sensor 3 and the magnetic part 4 due to equipment vibration and other reasons, and losing the detection effect.

[0030] An installation protection component 6 for installing the rotational speed sensor 3 is arranged on the positioning component 5. By setting the installation protection component 6, the rotational speed sensor 3 can be protected to prevent the rotational speed sensor 3 from being damaged and then losing the detection effect, and further prevent the situation that when the motor of the grate chain belt 2 is still running, but the grate chain belt 2 has stopped rotating, resulting in a reduction in the boiler operation load and even the shutdown of the boiler.

[0031] The installation protection component 6 includes a heat insulation protection housing 61 and a protection cover 62. The heat insulation protection housing 61 can protect and insulate the rotational speed sensor 3. The protection cover 62 and the heat insulation protection housing 61 can form a closed space to protect the rotational speed sensor 3 therein. The rotational speed sensor 3 is installed on the protection cover 62. Among them, a moving positioning part 63 is arranged between the heat insulation protection housing 61 and the protection cover 62. When installing the rotational speed sensor 3, by setting the moving positioning part 63, when the protection cover 62 is covered on the heat insulation protection housing 61, the rotational speed sensor 3 can travel along a preset track, and then the rotational speed sensor 3 is installed at a fixed position to make the rotational speed sensor 3 face the magnetic part 4 directly.

[0032] Specifically, the positioning component 5 includes a positioning roller 51 that abuts against the grate chain belt 2. A fixed shaft 52 is movably arranged inside the frame 1. The fixed shaft 52 is arranged between the two side walls of the frame 1. The fixed shaft 52 passes through the inside of the grate chain belt 2. The positioning roller 51 is rotatably arranged on the outer wall of the fixed shaft 52. As the grate chain belt 2 rotates, the positioning roller 51 can rotate on the outer wall of the fixed shaft 52.

[0033] An elevating member 53 for moving the positioning roller 51 is arranged on the outer wall of the frame 1. The end of the fixed shaft 52 passes through the frame 1 and is connected to the elevating member 53. A through groove 54 for the movement of the fixed shaft 52 is arranged on the side wall of the frame 1. By arranging the elevating member 53, the positioning roller 51 can be lifted and moved, so that the positioning roller 51 can tighten the grate chain belt 2, preventing the grate chain belt 2 from becoming loose due to long-term use, affecting the stable operation of the grate chain belt 2. At the same time, it prevents the grate chain belt 2 from becoming loose, resulting in the relative deviation of the rotation speed sensor 3 and the magnetic member 4 and losing the detection effect.

[0034] By lifting and moving, the positioning roller 51 can be adjusted to spread the grate chain belt 2. While adjusting the movement of the positioning roller 51, the positioning component 5 will also drive the rotation speed sensor 3 to move through the installation protection component 6, so that the rotation speed sensor 3 and the magnetic member 4 are continuously aligned, further improving the stability of coal supply in the boiler.

[0035] Specifically, the elevating member 53 includes mounting blocks 531 fixed on the outer wall of the frame 1. Two mounting blocks 531 are arranged side by side vertically. A threaded rod 532 passes through the upper mounting block 531 and is rotatably connected to it. The bottom end of the threaded rod 532 passes through the positioning roller 51 and is rotatably connected to the lower mounting block 531. The threaded rod 532 passing through the positioning roller 51 is threadedly connected to the positioning roller 51. By rotating the threaded rod 532, the positioning roller 51 can move vertically along the threaded rod 532 to realize the lifting of the fixed shaft 52, thereby adjusting the abutting position and force between the positioning roller and the grate chain belt.

[0036] Specifically, the threaded rod 532 passes through the mounting block 531. The mounting block 531 is penetrated and screwed with a locking bolt 533. The end of the locking bolt 533 abuts against the outer wall of the threaded rod 532, which can fix the state and position of the adjusted threaded rod 532.

[0037] Specifically, a through groove 54 for the movement of the fixed shaft 52 is arranged on the side wall of the frame 1. A guiding groove 55 is arranged on the top wall of the through groove 54. A moving rod 56 that slides in the guiding groove 55 is fixedly connected to the outer wall of the fixed shaft 52, playing a guiding role to ensure the stability and directionality of the fixed shaft 52 during the movement process.

[0038] Specifically, the moving positioning member 63 includes a guide rod 631 fixedly connected to the protective cover 62. A guide hole for the sliding of the guide rod 631 is provided at the end of the heat insulation protective housing 61. By the sliding of the provided guide rod 631 in the guide hole, guiding and positioning are achieved. A limiting member is provided between the guide rod 631 and the guide hole for positioning. After the rotational speed sensor 3 is installed on the protective cover 62, the protective cover 62 is covered on the opening of the heat insulation protective housing 61. Under the guidance of the guide rod 631 and the guide hole, the rotational speed sensor 3 and the magnetic member 4 can be directly aligned. A sealing gasket is provided between the protective cover 62 and the heat insulation protective housing 61 to play a sealing role and prevent external high temperature from damaging the rotational speed sensor 3.

[0039] A plug block 632 fixedly connected to the side wall of the protective cover 62 is in plug-in fit with the inlet of the heat insulation protective housing 61; the plug block 632 fixedly connected to the side wall of the protective cover 62 is in plug-in fit with the inlet of the heat insulation protective housing 61; the plug block 632 is made of a soft rubber block and is in interference fit with the inner wall of the heat insulation protective housing 61, improving the sealing performance and stability of the connection.

[0040] Specifically, an installation plate 64 is fixedly connected to the side wall of the protective cover 62. A connecting rod is fixedly connected to one side wall of the installation plate 64 close to the protective cover 62. The protective cover 62 is fixedly connected to the installation plate 64 through the connecting rod, and a certain distance is generated between the installation plate 64 and the protective cover 62 to facilitate the installation of the rotational speed sensor 3. A clamping groove 65 for the insertion of the rotational speed sensor 3 is provided at one end of the installation plate 64. The bottom of the clamping groove 65 fits the shape of the rotational speed sensor 3, making the installation of the rotational speed sensor 3 more stable. A locking nut 66 is screwed on the outer wall of the rotational speed sensor 3. The locking nuts 66 are respectively arranged on both sides of the installation plate 64. The installation plate 64 is clamped by the two locking nuts 66 to fix the rotational speed sensor 3.

[0041] Specifically, a vacuum heat insulation cavity 611 is provided inside the side wall of the heat insulation protective housing 61 to play a heat insulation role, prevent external high temperature from damaging the rotational speed sensor 3, and improve the stability of the device.

[0042] Specifically, a wave-transparent protective cover 67 is embedded in the side wall of the heat insulation protective housing 61 opposite to the magnetic member 4, which plays a protective role while ensuring that the rotational speed sensor can normally detect the signal of the magnetic member.

[0043] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present utility model.

[0044] In addition, the terms "first", "second", "third", "fourth" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth" may explicitly or implicitly include at least one of such features.

[0045] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "set", "connected", "fixed", "swivelly connected", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly limited, 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 circumstances.

[0046] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A device for improving the coal supply stability of a boiler, comprising a frame (1), wherein a grate chain belt (2) is rotatably arranged inside the frame (1), a rotational speed sensor (3) is arranged on the frame (1), and a magnetic part (4) adapted to the rotational speed sensor (3) is fixedly connected to the side of the grate chain belt (2), characterized in that: A positioning component (5) for defining the traveling trajectory of the magnetic member (4) is provided between the two side walls of the frame (1), wherein the positioning component (5) is in contact with the grate chain belt (2), and an installation protection component (6) for installing the rotational speed sensor (3) is provided on the positioning component (5); The installation protection component (6) includes a heat insulation protection housing (61) and a protection cover (62), the rotational speed sensor (3) is installed on the protection cover (62), and a moving positioning member (63) is provided between the heat insulation protection housing (61) and the protection cover (62).

2. The device for improving the coal supply stability of a boiler according to claim 1, wherein: The positioning component (5) includes a positioning roller (51) in contact with the grate chain belt (2), a fixed shaft (52) is movably arranged in the frame (1), the positioning roller (51) is rotatably arranged on the outer wall of the fixed shaft (52), a lifting member (53) for moving the positioning roller (51) is provided on the outer wall of the frame (1), and the end of the fixed shaft (52) passes through the frame (1) and is connected to the lifting member (53).

3. The device for improving the coal supply stability of a boiler according to claim 2, characterized in that: The lifting member (53) includes a mounting block (531) fixed on the outer wall of the frame (1), a threaded rod (532) is rotatably arranged on the mounting block (531), the threaded rod (532) passes through the positioning roller (51) and is threadedly connected thereto.

4. The device for improving the coal supply stability of a boiler according to claim 3, characterized in that: The threaded rod (532) passes through the mounting block (531), the mounting block (531) is penetrated and threadedly connected with a locking bolt (533), and the end of the locking bolt (533) abuts against the outer wall of the threaded rod (532).

5. The device for improving the coal supply stability of a boiler according to claim 3, characterized in that: A through groove (54) for the movement of the fixed shaft (52) is provided on the side wall of the frame (1), a guiding groove (55) is provided on the top wall of the through groove (54), and a moving rod (56) that slides in the guiding groove (55) is fixedly connected to the outer wall of the fixed shaft (52).

6. The device for improving the coal supply stability of a boiler according to claim 1, wherein: The moving positioning member (63) includes a guide rod (631) fixedly connected to the protection cover (62), a guide hole for the sliding of the guide rod (631) is provided at the end of the heat insulation protection housing (61), and a plug block (632) that is in plug-in fit with the inlet of the heat insulation protection housing (61) is fixedly connected to the side wall of the protection cover (62).

7. The device for improving the coal supply stability of a boiler according to claim 6, characterized in that: The plug block (632) is a soft rubber block, and the plug block (632) is in interference fit with the inner wall of the heat insulation protection housing (61).

8. A device for improving the coal supply stability of a boiler according to claim 1, characterized in that: A mounting plate (64) is fixedly connected to the side wall of the protection cover (62), a clamping groove (65) for the insertion of the rotational speed sensor (3) is provided at one end of the mounting plate (64), a locking nut (66) is threadedly connected to the outer wall of the rotational speed sensor (3), and the locking nuts (66) are respectively arranged on both sides of the mounting plate (64).

9. The device for improving the coal supply stability of a boiler according to claim 1, characterized in that: A vacuum heat insulation cavity (611) is provided inside the side wall of the heat insulation protection housing (61).

10. The device for improving the coal supply stability of a boiler according to claim 1, characterized in that: A wave-transmitting protective cover (67) is embedded in the side wall of the heat insulation protection housing (61) opposite to the magnetic member (4).

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