Novel fixed fire grate

Abstract

The utility model relates to the technical field of furnace combustors, in particular to a novel fixed fire grate which comprises a fire grate body, the fire grate body comprises a coil pipe, an upper plate is arranged at the top of the coil pipe, a temperature sensor is arranged at the position, close to the center of the coil pipe, of the upper plate, and electric heating ignition bars are evenly distributed on the periphery, close to the temperature sensor, of the upper plate. And the temperature sensor and the electric heating ignition rod are fixedly connected with a lifting actuator. The water-cooled fire grate structure is adopted, automatic ignition is achieved through the lifting actuator, and ignition safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of furnace burners, in particular to a novel fixed grate. Background Art

[0002] In traditional solid fuel-burning boilers, kilns, and related burners and other thermal energy application equipment, the commonly used fixed grates are mostly cast iron or cast steel grates. Since the grates are directly exposed to the high temperature of 600-1000℃ generated by fuel combustion, many metal materials will accelerate oxidation and ablation, greatly shortening their service life.

[0003] In order to extend the durability of the equipment, either the grate material is thickened or thickened, or the fuel with good air permeability is selected and the air pressure and air volume are increased to enhance the heat dissipation and properly protect the grate to extend its service life as much as possible. However, the former not only greatly increases the equipment cost but also makes the equipment too bulky and inconvenient to use and maintain; the latter is picky about fuel and increases the operating cost of the equipment. In addition, increasing the air pressure and air volume will also increase the heat loss, which is not conducive to energy saving and emission reduction. Utility Model Content

[0004] In order to solve the problems existing in the above-mentioned prior art, the utility model designs a new type of fixed grate, adopts a water-cooled grate structure, greatly reduces the material usage, reduces the product cost, and realizes automatic ignition through a lifting actuator to ensure ignition safety. The specific technical scheme is as follows:

[0005] A new type of fixed grate comprises a grate body, the grate body comprises a coil, an upper plate is arranged on the top of the coil, a temperature sensor is provided on the upper plate near the center of the coil, a plurality of electric thermal ignition rods are evenly distributed around the upper plate near the temperature sensor, and the temperature sensor and the electric thermal ignition rods are fixedly connected to a lifting actuator.

[0006] Preferably, the lifting actuator includes a clamping frame, to which the temperature sensor and the electric thermal ignition rod are fixedly connected, a coupling nut is provided on one side of the clamping frame, and the coupling nut is connected to the reduction motor through a screw rod, and the reduction motor, temperature sensor, electric thermal ignition rod are electrically connected to the central controller.

[0007] Furthermore, the clamping frame is provided with a plurality of short sleeves, and the temperature sensor and the electric thermal ignition rod are arranged in the short sleeves and fixed by bolts.

[0008] Preferably, a guide sleeve corresponding to the temperature sensor and the electric thermal ignition rod is welded on the bottom of the upper plate.

[0009] Furthermore, the clamping frame is provided with an upper position sensor and a lower position sensor, and the upper position sensor and the lower position sensor are electrically connected to the central controller.

[0010] Furthermore, the upper position sensor and the lower position sensor are both proximity switches, an upper limit block corresponding to the upper position sensor is provided at the bottom of the coil, and an upper limit block corresponding to the lower position sensor is provided at the bottom of the air distribution chamber 22.

[0011] Preferably, the upper plate is provided with a plurality of ventilation holes.

[0012] Preferably, the coil is in a planar spiral shape, the coil inlet is connected to a cooling water inlet pipe, and the coil outlet is connected to a cooling water outlet pipe.

[0013] Preferably, the coil is welded to the upper plate.

[0014] Furthermore, the short sleeve is fixedly connected to the clamping frame.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model adopts a water-cooled flat spiral circulation cooling structure, which effectively improves the cooling effect and prolongs the service life of the grate. At the same time, it has no special heat-resistant requirements for the metal material of the main structure. A telescopic electric heating rod is set in the grate for heating, and automatic ignition is achieved by a lifting clamping frame. The upper position sensor senses the telescopic position of the electric heating rod, and the temperature sensor senses the ignition temperature of the ignition area. The central controller controls the ignition duration according to the relevant sensing signal to achieve automatic ignition and save oil for manual ignition, thereby effectively reducing the labor intensity of workers and avoiding safety hazards caused by manual ignition. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] Figure 1 It is a structural schematic diagram of the fixed grate of the utility model.

[0019] Figure 2 It is a top view of the grate main structure of the fixed grate of the utility model.

[0020] Figure 3 It is a schematic diagram of the structure of the lifting actuator of the fixed grate of the utility model.

[0021] Figure 4 It is an overall application effect diagram of the fixed grate of the utility model.

[0022] In the figure: 1. Coil; 2. Upper plate; 6. Cooling water inlet pipe; 7. Cooling water outlet pipe; 8. Temperature sensor; 9. Electric heating ignition rod; 10. Clamping frame; 11. Coupling nut; 12. Screw; 13. Reducer motor; 14. Central controller; 15. Short sleeve; 16. Guide sleeve; 17. Upper position sensor; 18. Ventilation hole; 19. Upper limit block; 20. Combustion chamber; 21. Solid fuel; 22. Air distribution chamber; 23. Blower; 24. Lower position sensor; 25. Lower limit block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0024] See also Figures 1 to 4 , an embodiment provided by the utility model is as follows:

[0025] A novel fixed grate comprises a grate body, the grate body comprises a coil 1, the coil 1 is in a plane spiral shape and is formed by bending a seamless steel pipe, the inlet of the coil 1 is connected to a cooling water inlet pipe 6, and the outlet of the coil 1 is connected to a cooling water outlet pipe 7; an upper plate 2 is welded on the top of the coil 1, and a plurality of ventilation holes 18 are arranged on the upper plate 2 along the gap of the coil 1, and the heating surfaces of the coil 1 and the upper plate 2 are cooled by cooling water circulating in the coil 1, so as to ensure that the grate structure is not damaged by high temperature and extend the service life of the grate.

[0026] A temperature sensor 8 is provided near the center of the coil 1 on the upper plate 2. A plurality of electric heat ignition rods 9 are evenly distributed around the upper plate 2 near the temperature sensor 8. The temperature sensor 8 and the electric heat ignition rod 9 are fixedly connected to the lifting actuator. A guide sleeve 16 corresponding to the temperature sensor 8 and the electric heat ignition rod 9 is welded to the bottom of the upper plate 2. The temperature sensor 8 and the electric heat ignition rod 9 are arranged in the guide sleeve 16.

[0027] The lifting actuator includes a clamping frame 10, which is welded from steel sections. A temperature sensor 8 and an electric heat ignition rod 9 are fixedly connected to the clamping frame 10. A coupling nut 11 is provided on one side of the clamping frame 10. The coupling nut 11 is connected to a reduction motor 13 through a screw 12. The reduction motor 13, the temperature sensor 8, the electric heat ignition rod 9 are electrically connected to a central controller 14. The reduction motor 13 is a well-known technology, and the reduction motor 13 can realize forward and reverse rotation, thereby driving the clamping frame 10 to rise and fall.

[0028] The clamping frame 10 is provided with a plurality of short sleeves 15, and the temperature sensor 8 and the electric heat ignition rod 9 are arranged in the short sleeves 15 and fixed by bolts. The clamping frame 10 is provided with an upper position sensor 17 and a lower position sensor 24, which are electrically connected to the central controller 14, and the upper position sensor 17 and the lower position sensor 24 are both proximity switches, and the central controller 14 is a PLC controller. An upper limit block 19 corresponding to the upper position sensor 17 is provided at the bottom of the coil 1, which is used for the upper position sensor 17 to detect the rising height of the clamping frame 10. When the clamping frame 10 rises, when the distance between the upper position sensor 17 and the upper limit block 19 reaches the action distance, the proximity switch is actuated, and the central controller 14 controls the reduction motor 13 to stop rising, and the central controller 14 controls the electric heat ignition rod 9 to energize and heat and ignite.

[0029] When the temperature sensor 8 senses that the fuel temperature has risen to the set temperature and feeds back the signal to the central controller 14, the central controller 14 stops supplying power to the electric heating ignition rod 9 and outputs a signal to control the action of the reduction motor 13. The reduction motor 13 pulls the clamping frame 10 to drive the upper position sensor 17, the lower position sensor 24, the electric heating ignition rod 9 and the temperature sensor 8 to move downward along the guide direction of the guide sleeve 16 until the lower position sensor 24 approaches and senses the lower limit block 25 installed at the bottom of the air distribution chamber 22, and stops, and this ignition ends.

[0030] Working principle:

[0031] When the central controller 14 receives the start signal, the output signal controls the reduction motor 13 to operate, the reduction motor 13 drives the screw 12 to rotate, the screw 12 pushes the clamping frame 10 to move upward through the coupling nut 11, and the temperature sensor 8 and the electric heat ignition rod 9 on the clamping frame 10 move upward along the guide sleeve 16 into the combustion chamber 20. When the upper position sensor 17 senses the upper limit block 19, the reduction motor 13 stops, the central controller 14 controls the electric heat ignition rod 9 to ignite, the solid fuel 21 starts to burn, and the blower 23 blows air into the air distribution chamber 22 and into the combustion chamber through the ventilation hole 18 to help the solid fuel 21 burn. When the temperature sensor 8 detects that the ignition and combustion temperature of the fuel 21 reaches the preset temperature of the central controller 14, the ignition stops.

[0032] After the ignition work is completed, the central controller 14 controls the reduction motor 13 to reverse, driving the clamping frame 10 to move downward. When the lower position sensor 24 senses the lower limit block 25, the reduction motor 13 stops moving and waits for the next command from the central controller 14 before moving again.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A new type of fixed grate, characterized in that: The invention comprises a grate body, wherein the grate body comprises a coil (1), an upper plate (2) is arranged on the top of the coil (1), a temperature sensor (8) is arranged on the upper plate (2) near the center of the coil (1), a plurality of electric heating ignition rods (9) are evenly distributed around the upper plate (2) near the temperature sensor (8), and the temperature sensor (8) and the electric heating ignition rods (9) are fixedly connected to a lifting actuator.

2. A new type of fixed grate according to claim 1, characterized in that: The lifting actuator comprises a clamping frame (10), to which a temperature sensor (8) and the electric heat ignition rod (9) are fixedly connected, and a coupling nut (11) is provided on one side of the clamping frame (10), and the coupling nut (11) is connected to a reduction motor (13) through a screw rod (12), and the reduction motor (13), the temperature sensor (8), the electric heat ignition rod (9) are electrically connected to a central controller (14).

3. A new type of fixed grate according to claim 2, characterized in that: The clamping frame (10) is provided with a plurality of short sleeves (15), and the temperature sensor (8) and the electric heat ignition rod (9) are arranged in the short sleeves (15) and fixed by bolts.

4. A novel fixed grate according to claim 1, characterized in that: A guide sleeve (16) corresponding to the temperature sensor (8) and the electric heat ignition rod (9) is welded to the bottom of the upper plate (2).

5. A new type of fixed grate according to claim 2, characterized in that: An upper position sensor (17) and a lower position sensor (24) are provided on the clamping frame (10), and the upper position sensor (17) and the lower position sensor (24) are electrically connected to the central controller (14).

6. A new type of fixed grate according to claim 5, characterized in that: The upper position sensor (17) and the lower position sensor (24) are both proximity switches, and an upper limit block (19) corresponding to the upper position sensor (17) is provided at the bottom of the coil (1).

7. A novel fixed grate according to claim 1, characterized in that: The upper plate (2) is provided with a plurality of ventilation holes (18).

8. The novel fixed grate according to claim 1 is characterized in that: The coil (1) is in a planar spiral shape; the inlet of the coil (1) is connected to a cooling water inlet pipe (6), and the outlet of the coil (1) is connected to a cooling water outlet pipe (7).

9. A novel fixed grate according to claim 1, characterized in that: The coil (1) is welded to the upper plate (2).

10. The novel fixed grate according to claim 3, characterized in that: The short sleeve (15) is fixedly connected to the clamping frame (10).

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