CN221351959U

CN221351959U - A redundant structure for combustion-supporting fan automatic control of heating furnace

Info

Publication number: CN221351959U
Application number: CN202420059711.5U
Authority: CN
Inventors: 马翔
Original assignee: Shougang Changzhi Iron and Steel Co Ltd
Current assignee: Shougang Changzhi Iron and Steel Co Ltd
Filing date: 2024-01-10
Publication date: 2024-07-16
Anticipated expiration: 2034-01-10

Abstract

The utility model relates to the technical field of heating furnace redundancy, and discloses a redundancy structure for automatic control of a combustion-supporting fan of a heating furnace, which comprises a shell, wherein a combustion-supporting component is arranged below the shell; the combustion-supporting assembly comprises a supporting block, and the upper end of the supporting block is fixedly arranged at the lower end of the shell. According to the redundant structure for automatically controlling the combustion-supporting fan of the heating furnace, the safety performance of the system is improved by installing and improving the combustion-supporting assembly, and the control box is used for connecting the two completely independent control systems of combustion control and sequential control, so that the sequential control system becomes a redundant control system of the combustion control system, the uninterrupted operation of the combustion-supporting fan is realized, the system of the combustion-supporting fan can still be kept in a normal operation state when a problem occurs in the control system of the combustion-supporting fan, the huge potential safety hazard of gas concentration exceeding explosion caused by insufficient air supply in the heating furnace is eliminated, and the safety of the redundant structure for automatically controlling the combustion-supporting fan of the heating furnace is improved.

Description

A redundant structure for combustion-supporting fan automatic control of heating furnace

Technical Field

The utility model relates to the technical field of heating furnace redundancy, in particular to a redundancy structure for automatic control of a combustion-supporting fan of a heating furnace.

Background

In the prior art, patent document CN218376993U provides a heating furnace fan device, each fan of the heating furnace fan device is respectively communicated with a heating furnace pipeline, pipeline electric control switch valves are respectively arranged in the heating furnace pipelines between adjacent fans, an inlet of each fan is provided with an inlet electric control regulating valve, an outlet of each fan is respectively provided with an outlet electric control regulating valve, and the fans, the pipeline electric control switch valves, the inlet electric control regulating valves and the outlet electric control regulating valves are respectively connected with a control part. The fan equipment of the heating furnace can conveniently and reliably realize automatic control of fan switching, reduce labor intensity of field personnel, facilitate timely discovery of fault switching standby equipment, arrange maintenance personnel to inspect and maintain the fault equipment, and improve operation safety coefficient of the heating furnace.

However, because the prior art publication No. CN218376993U has two independent control systems for combustion control and sequential control of the section steel heating furnace when in use, when other modules of the combustion control system fail, a spare fan is needed to replace the failed module; when the combustion-supporting fan module breaks down, a fan stop accident is caused, a burner in the furnace is damaged, and a major potential safety hazard of explosion exists, so that an automatic control redundant structure of the combustion-supporting fan is provided.

Disclosure of utility model

(One) solving the technical problems

The utility model aims to provide a redundant structure for automatically controlling a combustion-supporting fan of a heating furnace, so as to solve the problems that in the prior art, the prior art publication No. CN218376993U is provided with two independent control systems for combustion control and sequential control of a section steel heating furnace when the technology is used, and when other modules of the combustion control system are failed, a spare fan is needed to replace the failed module; when the combustion-supporting fan module fails, the fan is stopped, the burner in the furnace is damaged, and the problem of great potential safety hazard of explosion exists.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions: the redundant structure for automatically controlling the combustion-supporting fan of the heating furnace comprises a shell, wherein a combustion-supporting component is arranged below the shell; the combustion-supporting assembly comprises a supporting block, the upper end fixed mounting of supporting block is in the lower extreme of casing, the lower extreme fixed mounting of supporting block has combustion-supporting fan, the output axle head of combustion-supporting fan runs through the lower extreme of supporting block and extends to the upper end of supporting block, the output axle head fixedly connected with connecting cap of combustion-supporting fan, the outer fixed mounting of connecting cap has a plurality of flabellums, the inner fixed first annular that is provided with of casing, the inner of first annular runs through the inner of casing and extends to the lower extreme of casing, flabellum movable mounting is at the inner of first annular, the inner fixed mounting of first annular has a plurality of stationary blades, the stationary blade is annular distribution, the upper end fixed mounting of stationary blade has the nozzle, the rear end fixed mounting of casing has the control box.

Preferably, the upper end fixed mounting of casing has the guard ring, the inner fixed second annular that is provided with of guard ring, the second annular runs through the guard ring and extends to the inner of casing, the inner fixed mounting of guard ring has a plurality of guard bars, the guard bar is annular distribution, the rear end of control box has the switch door through hinge movable mounting, the rear end fixed mounting of switch door has the handle, the right side of casing is provided with locating component, and the switch door is convenient to maintain the control box inside.

Preferably, the locating component comprises an extension plate, the extension plate is fixedly arranged at the lower end of the right end of the shell, a sliding groove is fixedly arranged at the inner end of the extension plate, the upper end of the extension plate is fixedly provided with protection plates, the number of the protection plates is two, the protection plates are symmetrically distributed with the central axis of the extension plate, the protection plates are fixedly arranged at the lower end of the right end of the shell, a sleeve is fixedly arranged at the front end of the protection plates, a sliding rod is movably arranged at the inner end of the sleeve, and the sliding rod can movably increase or reduce the stroke of the push plate in the sleeve.

Preferably, the slide rod penetrates through the inner end of the sleeve and extends to the front end of the sleeve, the right end of the slide rod is fixedly connected with the push plate, the outer end of the sleeve is movably provided with a spring, the rear end of the spring is movably arranged at the front end of the protection plate, the front end of the spring is movably arranged at the rear end of the push plate, the lower end of the push plate is fixedly provided with a sliding block, the sliding block is movably arranged at the inner end of the sliding groove, the right end of the push plate is fixedly provided with a retaining plate, and the retaining plate pushes the push plate away to two sides when steel conveniently moves towards the direction of the shell.

Preferably, the number of the sliding grooves is two and the sliding grooves are symmetrically distributed at the inner ends of the extension plates, the cross section of each sliding groove is T-shaped, and the T-shaped sliding grooves are convenient for limiting the T-shaped sliding blocks, so that the positions of the sliding blocks cannot deviate.

Preferably, the structures between the guard plates are symmetrically distributed about the central axis of the extension plate.

Preferably, the number of the sliding blocks is two, and the sliding blocks are T-shaped and are matched with the inner end surface of the sliding groove.

Preferably, the lower extreme fixedly connected with supporting leg of casing, the lower extreme fixedly mounted of supporting leg has the slipmat, and the supporting leg can provide supporting force and makes overall structure more stable.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the redundant structure for automatically controlling the combustion-supporting fan of the heating furnace, the safety performance of the system is improved by installing and improving the combustion-supporting assembly, and the control box is used for connecting the two completely independent control systems of combustion control and sequential control, so that the sequential control system becomes a redundant control system of the combustion control system, the uninterrupted operation of the combustion-supporting fan is realized, the combustion-supporting fan can still be kept in a normal operation state when the control system of the combustion-supporting fan is in a problem, the huge potential safety hazard of gas concentration exceeding explosion caused by insufficient air supply in the heating furnace is eliminated, and the safety of the redundant structure for automatically controlling the combustion-supporting fan of the heating furnace is improved;

2. According to the redundant structure for automatically controlling the combustion-supporting fan of the heating furnace, the limiting capacity is improved by installing and improving the positioning assembly, steel can be effectively positioned in the actual use process, so that the position of the steel can not deviate when the steel enters the inside of the shell, the heating efficiency is ensured, and the convenience of the redundant structure for automatically controlling the combustion-supporting fan of the heating furnace is improved;

3. According to the redundant structure for automatically controlling the combustion-supporting fan of the heating furnace, the protection and ventilation capacity of the device are improved through the installation and improvement of the second annular groove and the protection rod, and in the actual use process, combustible gas and air can be mixed and effectively discharged through the second annular groove to improve the fluidity of the gas, so that the use stability of the redundant structure for automatically controlling the combustion-supporting fan of the heating furnace is improved.

Drawings

FIG. 1 is a schematic perspective view of the first embodiment of the present utility model;

FIG. 2 is a schematic diagram of a second perspective structure of the present utility model;

FIG. 3 is a schematic view of a sectional structure of a chute according to the present utility model

FIG. 4 is a schematic diagram of a control circuit for selecting a start signal according to the present utility model;

FIG. 5 is a schematic diagram of a given selection circuit of the combustion fan of the present utility model;

FIG. 6 is a schematic diagram of a combustion fan frequency feedback circuit according to the present utility model;

FIG. 7 is a schematic diagram of a current feedback circuit of a combustion fan according to the present utility model

FIG. 8 is a schematic diagram of the operation signal circuit of the combustion fan of the present utility model

FIG. 9 is a schematic diagram of a ready signal feedback circuit for a combustion fan in accordance with the present utility model

FIG. 10 is a schematic diagram of a fault signal feedback circuit of the combustion fan of the present utility model.

In the figure: 1. a housing; 2. a combustion supporting component; 201. a support block; 202. a combustion fan; 203. a connecting cap; 204. a fan blade; 205. a first ring groove; 206. a fixing piece; 207. a burner; 208. a control box; 3. a protective ring; 4. a second ring groove; 5. a protective rod; 6. opening and closing a door; 7. a grip; 8. a positioning assembly; 801. an extension plate; 802. a chute; 803. a protection plate; 804. a sleeve; 805. a slide rod; 806. a push plate; 807. a spring; 808. a slide block; 809. a retaining plate; 9. support legs; 10. an anti-slip mat.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 10, the present utility model provides a technical solution: the redundant structure for automatically controlling the combustion-supporting fan of the heating furnace comprises a shell 1, wherein a combustion-supporting component 2 is arranged below the shell 1; the combustion-supporting assembly 2 comprises a supporting block, the upper end of the supporting block is fixedly arranged at the lower end of the shell 1, the lower end of the supporting block is fixedly provided with a combustion-supporting fan 202, the output shaft end of the combustion-supporting fan 202 penetrates through the lower end of the supporting block and extends to the upper end of the supporting block, the output shaft end of the combustion-supporting fan 202 is fixedly connected with a connecting cap 203, the outer end of the connecting cap 203 is fixedly provided with a plurality of fan blades 204, the inner end of the shell 1 is fixedly provided with a first annular groove 205, the first annular groove 205 penetrates through the inner end of the shell 1 and extends to the lower end of the shell 1, the fan blades 204 are movably arranged at the inner end of the first annular groove 205, a plurality of fixing plates 206 are fixedly arranged at the inner end of the first annular groove 205, the fixing plates 206 are distributed in an annular shape, the upper end of the fixing plates 206 are fixedly provided with a burner 207, and the rear end of the shell 1 is fixedly provided with a control box 208.

The upper end fixed mounting of casing 1 has guard ring 3, and guard ring 3's inner fixed be provided with second annular 4, and second annular 4 runs through guard ring 3 and extends to casing 1's inner, and guard ring 3's inner fixed mounting has a plurality of guard bars 5, and guard bar 5 is annular distribution, and control box 208's rear end has switch door 6 through hinge movable mounting, and switch door 6's rear end fixed mounting has handle 7, and casing 1's right side is provided with locating component 8, and switch door 6 is convenient to maintain control box 208 inside.

The positioning assembly 8 comprises an extension plate 801, the extension plate 801 is fixedly arranged at the lower end of the right end of the shell 1, a sliding groove 802 is fixedly arranged at the inner end of the extension plate 801, protection plates 803 are fixedly arranged at the upper ends of the extension plate 801, the number of the protection plates 803 is two, the protection plates 803 are symmetrically distributed on the central axis of the extension plate 801, the protection plates 803 are fixedly arranged at the lower end of the right end of the shell 1, a sleeve 804 is fixedly arranged at the front end of the protection plates 803, a sliding rod 805 is movably arranged at the inner end of the sleeve 804, the sliding rod 805 penetrates through the inner end of the sleeve 804 and extends to the front end of the sleeve 804, a push plate 806 is fixedly connected at the right end of the sliding rod 805, a spring 807 is movably arranged at the outer end of the sleeve 804, the rear end of the spring 807 is movably arranged at the front end of the protection plates 803, a sliding block 808 is fixedly arranged at the rear end of the push plate 806, the sliding block 808 is movably arranged at the lower end of the sliding plate 806, the sliding block 808 is fixedly arranged at the inner end of the sliding groove 802, the right end of the push plate 806 is fixedly arranged at the right end of the push plate 806, the sliding plate 805 can movably increase or decrease the stroke of the push plate 804 in the sleeve 804, the sliding rod 809 is movably arranged at the sleeve 804, the sliding rod 806 is conveniently pushes steel material to the push plate 806 to the two sides of the push plate 1 when the push plate is moved to the two sides of the push plate side of the steel plate 806.

The number of the sliding grooves 802 is two, the sliding grooves 802 are symmetrically distributed at the inner ends of the extending plates 801, the cross section of each sliding groove 802 is in a T shape, the structures among the protection plates 803 are symmetrically distributed with the central shaft of the extending plates 801, the number of the sliding blocks 808 are two, the sliding blocks are in a T shape and are matched with the inner end surfaces of the sliding grooves 802, the lower ends of the shell 1 are fixedly connected with supporting legs 9, the anti-slip pads 10 are fixedly arranged at the lower ends of the supporting legs 9, the T-shaped sliding grooves 802 are convenient for limiting the T-shaped sliding blocks 808, the positions of the sliding blocks 808 cannot deviate, and the supporting legs 9 can provide supporting force to enable the whole structure to be more stable.

Working principle: through the combustion control PLC in the control box 208, the relay is connected and led into the sequential control system control on the relay KA1 operated by the original combustion fan 202, when the relay is powered on, the relay finishes the starting control of the combustion fan 202 by the loop 1 combustion control PLC, and when the relay is powered off, the relay finishes the starting control of the combustion fan 202 by the loop 2 combustion control PLC;

1 relay KA2 is added through a combustion control PLC in the control box 208, and the combustion control system and the sequential control system are connected at the same time, so that the relay gives out a 4-20 mA control combustion fan 202 frequency signal by a loop 1 namely the combustion control PLC when power is on, and gives out a 4-20 mA control combustion fan 202 frequency signal by a loop 2 namely the sequential control PLC when power is off;

2 isolators are added in a combustion control PLC in the control box 208, the frequency and current feedback signal 1 of the frequency converter of the combustion fan 202 is divided into 2 paths, and the 2 paths are respectively connected into the sequential control PLC and the combustion control PLC;

3 relays are added through a sequential control PLC in the control box 208, and 3 signals of running, readiness and faults of the frequency converter are transmitted to the sequential control PLC, so that the monitoring of the running condition of the combustion fan 202 is realized;

and (3) changing a program by the sequential control PLC in the control box 208 to manufacture an operation picture of the redundant system. The frequency is set to 46Hz, and when the combustion control PLC fails, the sequential control PLC will operate the combustion fan 202 at 46 Hz.

Finally, it should be noted that the above description is only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model, and that the simple modification and equivalent substitution of the technical solution of the present utility model can be made by those skilled in the art without departing from the spirit and scope of the technical solution of the present utility model.

Claims

1. A redundant structure for combustion-supporting fan automatic control of heating furnace, includes casing (1), its characterized in that: a combustion-supporting component (2) is arranged below the shell (1);

The combustion-supporting assembly (2) comprises a supporting block (201), the upper end fixed mounting of supporting block (201) is at the lower extreme of casing (1), the lower extreme fixed mounting of supporting block (201) has combustion-supporting fan (202), the output axle head of combustion-supporting fan (202) runs through the lower extreme of supporting block (201) and extends to the upper end of supporting block (201), the output axle head fixedly connected with link cap (203) of combustion-supporting fan (202), the outer fixed mounting of link cap (203) has a plurality of flabellum (204), the inner fixed mounting of casing (1) is provided with first annular (205), the inner of casing (1) is run through to the lower extreme of casing (1) in first annular (205), flabellum (204) movable mounting is at the inner of first annular (205), the inner fixed mounting of first annular (205) has a plurality of stationary blades (206), stationary blade (206) are annular distribution, the upper end fixed mounting of stationary blade (206) has burner (207), the rear end fixed mounting (208) of casing (1).

2. The redundancy structure for automatic control of a combustion fan of a heating furnace according to claim 1, wherein: the utility model discloses a protection device for the automobile, including casing (1), guard ring (3) are fixed to the upper end fixed mounting of casing (1), the inner fixed second annular (4) that is provided with of guard ring (3), second annular (4) run through guard ring (3) and extend to the inner of casing (1), the inner fixed mounting of guard ring (3) has a plurality of guard bars (5), guard bars (5) are annular and distribute, the rear end of control box (208) is through hinge movable mounting switch door (6), the rear end of switch door (6) is fixed mounting has handle (7), the right side of casing (1) is provided with locating component (8).

3. A redundant structure for automatic control of a combustion fan of a heating furnace according to claim 2, wherein: the locating component (8) comprises an extending plate (801), the extending plate (801) is fixedly arranged at the lower end of the right end of the shell (1), a sliding groove (802) is fixedly arranged at the inner end of the extending plate (801), protection plates (803) are fixedly arranged at the upper ends of the extending plate (801), the number of the protection plates (803) is two, the protection plates (803) are symmetrically distributed with the central shaft of the extending plate (801), the protection plates (803) are fixedly arranged at the lower end of the right end of the shell (1), a sleeve (804) is fixedly arranged at the front end of the protection plates (803), and sliding rods (805) are movably arranged at the inner ends of the sleeves (804).

4. A redundant structure for automatic control of a combustion fan of a heating furnace according to claim 3, wherein: the utility model discloses a slide bar, including sleeve pipe (804), slide bar (805), push pedal (806) are fixed connection in right-hand member of slide bar (805), the outer end movable mounting of sleeve pipe (804) has spring (807), the rear end movable mounting of spring (807) is at the front end of guard plate (803), the front end movable mounting of spring (807) is at the rear end of push pedal (806), the fixed slider (808) that is provided with in lower extreme of push pedal (806), slider (808) movable mounting is at the inner of spout (802), the right-hand member fixed mounting of push pedal (806) has butt plate (809).

5. The redundant structure for automatically controlling a combustion fan of a heating furnace according to claim 4, wherein: the number of the sliding grooves (802) is two, the sliding grooves are symmetrically distributed at the inner end of the extension plate (801), and the cross section of each sliding groove (802) is T-shaped.

6. The redundant structure for automatically controlling a combustion fan of a heating furnace according to claim 5, wherein: the structures between the guard plates (803) are symmetrically distributed with the central axis of the extension plate (801).

7. The redundant structure for automatically controlling a combustion fan of a heating furnace according to claim 6, wherein: the number of the sliding blocks (808) is two, and the sliding blocks are T-shaped and are matched with the inner end surface of the sliding groove (802).

8. The redundancy structure for automatic control of a combustion fan of a heating furnace according to claim 1, wherein: the anti-slip device is characterized in that the lower end of the shell (1) is fixedly connected with supporting legs (9), and anti-slip pads (10) are arranged at the lower ends of the supporting legs (9).