CN220229228U

CN220229228U - Mechanical ash removal device driven by screw rod

Info

Publication number: CN220229228U
Application number: CN202321754961.2U
Authority: CN
Inventors: 孟令聪; 黄波; 董康; 赵治军; 朱洋; 许钞俊; 李特
Original assignee: Henan Dongfang Boiler Chengfa Environmental Protection Equipment Co ltd; Dongfang Boiler Group Co Ltd
Current assignee: Henan Dongfang Boiler Chengfa Environmental Protection Equipment Co ltd; Dongfang Boiler Group Co Ltd
Priority date: 2023-07-05
Filing date: 2023-07-05
Publication date: 2023-12-22
Anticipated expiration: 2033-07-05

Abstract

The utility model discloses a mechanical ash removal device driven by a screw rod, and belongs to the technical field of boiler waste heat utilization. Including the economizer, be provided with a plurality of heat exchanger light pipes in the economizer, the economizer top is provided with gear motor, a plurality of transmission shaft end-to-end connection has the worm, lead screw and turbine one end are connected, the lead screw is all connected to the turbine both sides, the lead screw is fixed by the lead screw bearing frame, lead screw nut one side has set firmly the linking bridge, linking bridge rear outer wall is provided with the ash removal board, the economizer outer wall still is provided with contact sensor, usable ash removal board carries out mechanical ash removal to every heat exchanger light pipe and can prevent ash removal board part and light pipe production excessive friction, in order to avoid damaging the heat exchanger, still effectually guaranteed ash removal board four corners synchronous motion, guarantee the precision of motion, thereby the deposition and the ash on the light pipe ash removal that can be relaxed, improve the heat exchange efficiency of economizer greatly, guarantee the boiler operation safety when the ash removal effect.

Description

Mechanical ash removal device driven by screw rod

Technical Field

The utility model relates to the technical field of boiler waste heat utilization, in particular to a mechanical ash removal device for screw rod transmission.

Background

As is well known, the environment protection forced requirement is that the ultralow emission is implemented, the desulfurization and denitration equipment is additionally arranged in the boiler, the generated ammonia bisulfate is in a liquid state within the temperature range of 146-207 ℃, the capability of capturing the fly ash by the liquid ammonia bisulfate (NH 4HSO 4) is extremely strong, the liquid ammonia bisulfate is adhered to the fly ash to form fused salt-like deposited ash, the fused salt-like deposited ash is adhered to an economizer pipeline at the tail part of a flue, the economizer is blocked and corroded, the biomass boiler is caused, the fly ash generated by combustion contains a large amount of alkali metals, the fly ash has strong viscosity, the ash blocking of the economizer is easy to be caused, the actual boiler does not adopt a low water temperature according to the design requirement, the partial dew condensation of a heating surface is caused, the deposited ash and the ash are mixed with the ash in the flue gas to form ash, the heat transfer effect of the heating surface is reduced, and the generated energy is reduced;

because of the flue gas characteristics of industrial boilers, the economizer is blocked and ash and dirt are prevented, and in order to prevent the dust and dirt from being deposited, an ash removing device is generally adopted, so that the dust and dirt are more convenient to clean.

The existing ash removal device still has the following problems: the ash removal modes commonly used in the boiler industry at present mainly comprise: the ash removal modes are limited by practice, are not ideal, are quite easy to cause incomplete ash removal, and still have dust adhered to a light pipe of the heat exchanger to cause the reduction of the heat transfer effect of a heating surface and the reduction of the generated energy;

and the damage to the economizer is easily caused when the sonic ash removal, the combustible gas explosion ash removal and the mechanical vibration device ash removal are carried out, and the long-term ash removal is not utilized.

In view of this, we propose a mechanical ash removal device for screw drive.

Disclosure of Invention

1. Technical problem to be solved

The utility model aims to provide a mechanical ash removal device for screw rod transmission, which aims to solve the problems in the background technology.

2. Technical proposal

The mechanical ash removal device comprises an economizer, wherein a plurality of heat exchanger light pipes are arranged in the economizer, and a speed reducing motor is arranged at the top of the economizer;

the speed reducing motor is connected with transmission shafts at output ends at two sides of the speed reducing motor, the longitudinal axial direction of the transmission shafts is perpendicular to the longitudinal axial direction of the heat exchanger light pipe, a transmission bearing seat is arranged at the top of the coal economizer, the transmission shafts are movably sleeved inside the transmission bearing seat, a plurality of transmission shaft ends are connected with worms, screw rod bearing seats are arranged on the front outer wall and the rear outer wall of the coal economizer, a turbine is movably connected between the two screw rod bearing seats, the turbine is connected with one end of the worm, the longitudinal axial direction of the turbine is parallel to the longitudinal axial direction of the heat exchanger light pipe, and screw rods are arranged at two sides of the screw rod bearing seats.

The screw rods are connected with one end of the turbine, the screw rods are connected with two sides of the turbine and are fixed by screw rod bearing seats, the longitudinal axial direction of the turbine is parallel to the longitudinal axial direction of the heat exchanger light pipe, and screw rod nuts are arranged on the circumferential outer walls of the screw rods;

the screw rod nut, screw rod nut one side has set firmly the linking bridge, linking bridge rear outer wall is provided with the ash removal board, a plurality of clean round holes have been seted up to the ash removal board inside, and is a plurality of clean round hole and heat exchanger light pipe in close contact, the economizer outer wall still is provided with the contact sensor with gear motor electric connection, contact sensor with the ash removal board opposition sets up.

Preferably, the tail ends of the screw rods are connected with double-row chain wheels, double-row chains are arranged on the circumferential outer walls of the double-row chain wheels, and chain wheel bearing seats are arranged on the front outer wall and the rear outer wall of the coal economizer, which are close to one sides of the double-row chain wheels.

Preferably, the worm wheel and the worm drive transmit the rotation of the transmission shaft to the screw rod, and the transmission shaft is vertically arranged with the screw rod.

Preferably, the number of the screw rods is eight, and a plurality of screw rods are respectively arranged on two sides of the economizer.

Preferably, the ash removing plate is formed by cutting round holes by a whole steel plate, and the positions of the cutting holes are in one-to-one correspondence with the positions of the light pipes of the heat exchanger.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that: firstly, the ash removal plate is contacted with each light pipe to wrap the light pipes, so that mechanical ash removal is cleaner.

Secondly, the screw rod is used as a transmission part, and drives the nut to move through positive and negative rotation, so as to drive the connected ash removing plate to reciprocate, and the screw rod is also a bearing and limiting part and bears the weight of the ash removing plate and the connecting support, and prevents the ash removing plate from generating excessive friction with the light pipe locally so as not to damage the heat exchanger.

And thirdly, the double output shafts of the gear motor ensure the four corners synchronous movement of the ash removal plate and the movement precision through the transmission of the output shafts, the worm gear, the screw nut, the chain wheel and the chain.

Fourthly, this mechanical ash removal device can be light in the economizer working process with opportunity and ash dirt deashing on the fluorescent lamp, improves the heat exchange efficiency of economizer greatly, and can go down always in the middle of the boiler operation, adjusts the back and forth movement of ash removal board through the contact sensor, because of its motion is comparatively slow, guarantees the boiler operation safety when the deashing effect.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic elevational view of the present utility model;

FIG. 3 is a schematic cross-sectional view of the present utility model;

FIG. 4 is a schematic top view of the present utility model;

the reference numerals in the figures illustrate: 1. an economizer; 2. a speed reducing motor; 3. a transmission shaft; 4. a worm; 5. a turbine; 6. a screw rod; 7. a screw nut; 8. an ash removal plate; 9. a connecting bracket; 10. double row chain wheels; 11. double rows of chains; 12. a transmission bearing seat; 13. a sprocket bearing seat; 14. a screw rod bearing seat; 15. a touch sensor.

Detailed Description

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-4, the present utility model provides a technical solution:

a mechanical ash removal device driven by a screw rod comprises an economizer 1, wherein a plurality of heat exchanger light pipes are arranged in the economizer 1, and a speed reducing motor 2 is arranged at the top of the economizer 1;

the output ends at two sides of the gear motor 2 are connected with a transmission shaft 3, the longitudinal axial direction of the transmission shaft 3 is perpendicular to the longitudinal axial direction of a heat exchanger light pipe, a transmission bearing seat 12 is arranged at the top of the coal economizer 1, the transmission shaft 3 is movably sleeved inside the transmission shaft bearing seat 12, the tail ends of a plurality of transmission shafts 3 are connected with worms 4, screw rod bearing seats 14 are arranged on the front outer wall and the rear outer wall of the coal economizer 1, a turbine 5 is movably connected between the two screw rod bearing seats 14, the turbine 5 is connected with one end of each worm 4, the longitudinal axial direction of the turbine 5 is parallel to the longitudinal axial direction of the heat exchanger light pipe, screw rods 6 are arranged at two sides of each screw rod bearing seat 14, the transmission shaft 3 is conveniently fixed by the aid of the transmission shaft bearing seat 12, and the transmission shaft 3 is prevented from being deviated and the transmission shaft 3 is better matched to rotate.

The screw rods 6 are connected with one end of the turbine 5, the screw rods 6 are connected with two sides of the turbine 5, the screw rods 6 are fixed by screw rod bearing seats 14, the longitudinal axial direction of the turbine 5 is parallel to the longitudinal axial direction of the heat exchanger light pipes, screw rod nuts 7 are arranged on the circumferential outer walls of the screw rods 6, the screw rod nuts 7 are fixed with the connecting brackets 9 through bolts, and the ash cleaning plate 8 is conveniently driven to be contacted with each heat exchanger light pipe in the economizer body 1 to carry out effective physical contact ash cleaning;

the connecting bracket 9 has been set firmly to lead screw nut 7 one side, the outer wall in connecting bracket 9 rear is provided with the ash removal board 8, a plurality of clean round holes have been seted up to ash removal board 8 inside, a plurality of clean round holes and heat exchanger fluorescent tube in close contact, the economizer 1 outer wall still sets up the contact sensor 15 with gear motor 2 electric connection, contact sensor 15 is prior art, the common model in market can be selected for use, contact sensor 15 and ash removal board 8 opposition setting, can effectually utilize contact sensor 15 to carry out contact response to ash removal board 8, then gear motor 2 reversal when contact sensor 15 senses ash removal board 8, thereby effectual regulation ash removal board reciprocating motion, because of its motion is comparatively slow, guarantee boiler operation safety when the deashing effect.

Specifically, a plurality of lead screw 6 end-to-end connection has double sprocket 10, double sprocket 10 circumference outer wall is provided with double chain 11, outer wall all is provided with sprocket bearing frame 13 near double sprocket 10 one side around the economizer 1, the lead screw nut 7 and the higher authority of lower lead screw 6 through double chain 11 transmission about the device are unanimous, it is fixed with linking bridge 9 through the bolt, double sprocket 10 and double chain 11 transmission mode, guarantee the transportation of driving force, can avoid the equipment trouble because of the chain fracture leads to simultaneously, this kind of transmission mode guarantees the synchronous reciprocating motion in ash handling work four corners, the card that the speed difference caused can not appear.

Further, the turbine 5 and the worm 4 drive the rotation of the transmission shaft 3 to be transmitted to the screw rod 6, the transmission shaft 3 and the screw rod 6 are vertically arranged, the worm 4 is conveniently utilized to transmit the drive of the gear motor 2 to the turbine 5, so that the turbine drives the screw rod to rotate, and the ash cleaning plate 8 is driven to reciprocate to physically clean ash on a plurality of heat exchanger light pipes.

Still further, lead screw 6 totally has eight places, and a plurality of lead screws 6 set up respectively in economizer 1 both sides, conveniently carry out more comprehensive deashing to economizer 1 both sides.

Furthermore, the ash removal plate 8 is formed by cutting round holes through a whole steel plate, the positions of the cutting holes correspond to the positions of the heat exchanger light pipes one by one, the circumferential surfaces of the plurality of heat exchanger light pipes are convenient to clean better, the ash removal effect is more comprehensive, and the defect that dead angles cannot be removed is effectively avoided.

In addition, the present utility model relates to circuits, electronic components and modules in the prior art, and those skilled in the art can fully implement the present utility model, and needless to say, the protection of the present utility model does not relate to improvement of the internal structure and method.

Working principle: the speed reducing motor 2 is effectively utilized to drive the two ends of the speed reducing motor to be connected with the transmission shaft 3 for rotation, the transmission shaft is fixed by the bearing seat, one side of the transmission shaft 3 is connected with the worm 4, the worm 4 rotates simultaneously, the rotation of the transmission shaft 3 is transmitted to the turbine 5 for rotation, the screw rod 6 connected with the two sides of the turbine 5 rotates at the moment, the screw rod 6 is provided with the screw rod nut 7, the turbine 5 rotates to drive the screw rod 6, the screw rod nut 7 is driven to move along the direction of the screw rod 6, the screw rod nut 7 is fixedly connected with the connecting bracket 9, the connecting bracket 9 is connected with the ash removing plate 8, and thus the rotation of the speed reducing motor 2 drives the ash removing plate 8 to move along the direction of the light pipe; and the double chain wheels 10 are connected to the two sides of the screw rod 6 above and below, the double chain wheels 10 are driven by the double chain 110, so that the upper screw rod 6 and the lower screw rod 6 can move synchronously, when the ash cleaning plate 8 touches the contact sensor 15, the speed reducing motor 2 is triggered to reversely rotate for carrying out reciprocating movement to clean ash, and the accumulated ash and the ash scale on the light pipe are effectively cleaned from the surface of the light pipe, so that the heat exchange efficiency of the heat exchanger is greatly improved.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a lead screw transmission's mechanical ash removal device, includes economizer (1), be provided with a plurality of heat exchanger light pipes, its characterized in that in economizer (1): a speed reducing motor (2) is arranged at the top of the economizer (1);

the device comprises a speed reducing motor (2), wherein the output ends at two sides of the speed reducing motor (2) are connected with a transmission shaft (3), the longitudinal axial direction of the transmission shaft (3) is perpendicular to the longitudinal axial direction of a heat exchanger light pipe, a transmission bearing seat (12) is arranged at the top of the coal economizer (1), the transmission shaft (3) is movably sleeved inside the transmission shaft bearing seat (12), a plurality of transmission shaft (3) tail ends are connected with worms (4), screw bearing seats (14) are arranged on the front outer wall and the rear outer wall of the coal economizer (1), a turbine (5) is movably connected between the two screw bearing seats (14), the turbine (5) is connected with one end of the worm (4), the longitudinal axial direction of the turbine (5) is parallel to the longitudinal axial direction of the heat exchanger light pipe, and screw rods (6) are arranged at two sides of the screw bearing seats (14).

The screw rods (6) are connected with one end of the turbine (5), the screw rods (6) are connected with two sides of the turbine (5), the screw rods (6) are fixed by screw rod bearing blocks (14), the longitudinal axial direction of the turbine (5) is parallel to the longitudinal axial direction of the heat exchanger light pipe, and screw rod nuts (7) are arranged on the circumferential outer walls of the screw rods (6);

the device comprises a screw nut (7), wherein a connecting support (9) is fixedly arranged on one side of the screw nut (7), an ash removing plate (8) is arranged on the outer wall of the rear of the connecting support (9), a plurality of cleaning round holes are formed in the ash removing plate (8), the cleaning round holes are in close contact with a heat exchanger light pipe, a contact sensor (15) electrically connected with a gear motor (2) is further arranged on the outer wall of the coal economizer (1), and the contact sensor (15) is oppositely arranged with the ash removing plate (8).

2. The mechanical ash removal device for screw drive of claim 1, wherein: the tail ends of the screw rods (6) are connected with double-row chain wheels (10), double-row chains (11) are arranged on the circumferential outer walls of the double-row chain wheels (10), and sprocket bearing seats (13) are arranged on the front outer wall and the rear outer wall of the coal economizer (1) and on one side, close to the double-row chain wheels (10).

3. A mechanical ash removal device for screw drive according to claim 2, characterized in that: the turbine (5) and the worm (4) are used for transmitting the rotation of the transmission shaft (3) to the screw rod (6), and the transmission shaft (3) and the screw rod (6) are vertically arranged.

4. A mechanical ash removal device for screw drive according to claim 3, characterized in that: eight lead screws (6) are arranged, and a plurality of lead screws (6) are respectively arranged at two sides of the economizer (1).

5. The mechanical ash removal device for screw drive of claim 4, wherein: the ash removal plate (8) is formed by cutting round holes through a whole steel plate, and the positions of the cutting holes are in one-to-one correspondence with the positions of the heat exchanger light pipes.