CN216073887U

CN216073887U - Blast furnace ironmaking energy-saving distributing device

Info

Publication number: CN216073887U
Application number: CN202122336691.0U
Authority: CN
Inventors: 蒋治浩; 张建; 李永忠
Original assignee: Beijing Shougang International Engineering Technology Co Ltd
Current assignee: Beijing Shougang International Engineering Technology Co Ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-03-18
Anticipated expiration: 2031-09-26

Abstract

An energy-saving distributor for blast furnace ironmaking belongs to the technical field of blast furnace top equipment. The utility model solves the problem that the closed space where the transmission device is located requires a normal-temperature dust-free working space. The rotary motion and the tilting motion of the distributing device respectively adopt an integrated transmission motion unit; the two motion units are independent; the rotary motion of the ball screw mechanism drives the backing ring component to translate up and down, and the up-and-down translation of the backing ring component is converted into the tilting motion of the distribution chute and the synthesis of the two motions through the slider-crank mechanism, so that the spiral motion of the distribution chute is realized. When specifically arranging, the power integration transmission unit arranges on the distributing device overhead guard, and three sets of ball screw mechanisms of the same helical pitch hang on the distributing device overhead guard, arrange in airtight space including transmission components such as ball screw mechanism, backing ring subassembly and double-deck slewing bearing, and equipment operating mode condition is good, the distributing device has long service life's characteristics, has practiced thrift the energy resource consumption that a large amount of nitrogen gas seal brought.

Description

Blast furnace ironmaking energy-saving distributing device

Technical Field

The utility model relates to the technical field of sealing, the technical field of low-thermal-conductivity material heat insulation and circulating water cooling equipment and the comprehensive application of the technical field of mechanical transmission in the technical field of blast furnace top equipment, in particular to an energy-saving distributing device for blast furnace ironmaking.

Background

In blast furnace iron-making production, at the top of a blast furnace, furnace top charging equipment is used for charging and charging into the furnace, reasonably distributing furnace burden in the furnace and simultaneously playing a role in sealing the furnace top. The method has close relation with the pig iron yield, the energy consumption, the enterprise benefit and the like, and the quality and the yield of the blast furnace smelting product molten iron are directly influenced by the performance of a distributor in the blast furnace top charging equipment. At present, a large-sized blast furnace in service of a domestic iron and steel plant adopts a plurality of PW distributing devices, the distributing devices adopt a more complex planetary gear mechanism and a differential mechanism to control the rotation and the swing of a chute, the weight of equipment is heavy, the structure and a transmission system are complex, the transmission efficiency is low, and the price is high, and the manufacturing period is long; the PW distributing device adopts a plate type and the like to flow downwards for cooling under the action of the gravity of water, the cooling of the PW distributing device is open type cooling, and the cooling capacity has an upper limit value and cannot be increased; the PW distributing device is sealed by a large annular gap graphite block, the sealing effect is general, and the nitrogen consumption is moderate; the nitrogen gas sealing consumption of the material distribution device used in each iron and steel plant at present is 800-1500 Nm³More than h, the nitrogen energy consumption in one year is considerable, and thousands of yuan is often consumed. In order to overcome the complexity of a PW distributor gear box, a BT type hydraulic transmission bell-less distributor adopting three hydraulic cylinder synchronous lifting mechanisms is additionally arranged. The PW type distributor medium and small sized blast furnace has high use cost. The BT type hydraulic transmission bell-less distributor adopts a hydraulic cylinder for driving, and because a hydraulic system is easy to leak oil in a high-temperature environment to pollute the environment, the fireproof performance is poor, and certain limitation exists in use.

The blast furnace top distributing device works in a high-temperature, high-pressure and high-dust-content toxic furnace gas area, and consists of a power supply device, a transmission device, a connecting device and an actuating mechanism. The transmission device does not allow short-term replacement, and the length of the replacement period determines the quality of the designed distributor. The transmission must therefore be installed in a closed space independent of the area of the furnace to which the actuator is exposed, this area being generally called the transmission casing, consisting of the top cover, the casing, the central throat, the water-cooled chassis, the trunnion swivel. Because the actuating mechanism periodically and continuously rotates, and the thermal expansion effect of materials caused by the great temperature fluctuation factor of the furnace condition is considered, a larger gap is reserved between the trunnion rotating sleeve which drives the distribution chute to rotate and the cylindrical junction surface of the central throat pipe and the water-cooling chassis of the transmission box body during design, the gap is used for eliminating ovality caused by the thermal expansion amount of the materials and machining errors and possible vibration caused by the rotation of the trunnion rotating sleeve, and the sealing of the gap is important.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an energy-saving distributor for blast furnace ironmaking, which solves the problem that a closed space where a transmission device is located requires a normal-temperature dust-free working space; the problem of effective cooling of the distributor; the ball screw is adopted for transmission, so that the mechanical transmission efficiency and the motion reliability are effectively improved. Meanwhile, energy consumption caused by sealing of a large amount of nitrogen is saved.

An energy-saving distributor for blast furnace ironmaking comprises a central throat pipe 1, a double-layer slewing bearing 2, a top cover 4, a box body 24, a water-cooling chassis 10, a trunnion rotating sleeve 7, a trunnion ring assembly 25, a distributing chute 20, a bracket 5, a trunnion 16 and a crank 17. The top cover 4 is provided with a ball screw mechanism 26, an alpha angle integrated transmission unit 29 and a beta angle integrated transmission unit 33. The central throat pipe 1 consists of a water distribution plate 12, a crack water jacket 13 and a sealing bottom plate 14. The trunnion ring assembly 25 is composed of a transverse slideway 18, a pull rod guide roller seat 27, a lower slewing bearing 22 and a thumb wheel component 23. The trunnion swivel sleeve 7 comprises a vertical slideway. The ball screw mechanism 26 is composed of the synchronization pinion 3 and the screw housing 28. The α -angle integrated transmission unit 29 is composed of a first absolute value encoder 30, a master controller 31, and a tilt pinion 32. The β -angle integrated transmission unit 33 is composed of a second absolute value encoder 34, a proximity switch 35, and a rotation pinion 36. The trunnion 16 is arranged on the middle part of the trunnion rotating sleeve 7, and the crank 17 and the bracket 5 are arranged on the two sides in a spline connection mode.

The energy-saving distributor is arranged on a furnace top steel ring 11, the bracket 5 is arranged on a trunnion 16 spline arranged in the middle of a trunnion rotating sleeve 7, and a distribution chute 20 of the energy-saving distributor is hung and clamped and combined to be hung on the bracket 5. The trunnion rotating sleeve 7 is connected with an outer gear ring at the lower end of the double-layer slewing bearing 2, a beta angle integrated transmission unit 33 is arranged on a top cover 4 of the distributing device, a second absolute value type encoder 34, a proximity switch 35 and a rotary pinion 36 are sequentially connected, and the rotary pinion 36 is meshed with the outer gear ring at the lower part of the double-layer slewing bearing 2; the alpha angle integrated transmission unit 29 is arranged on the top cover 4 of the distributing device, the first absolute value type encoder 30, the master controller 31 and the tilting pinion 32 are sequentially connected, and the tilting pinion 32 is meshed with an outer gear ring on the upper part of the double-layer slewing bearing 2 to carry out transmission; a ball screw mechanism 26 vertically arranged on the top cover 4 extends into the box body 24, a synchronous pinion 3 is arranged at the upper part of the ball screw mechanism 26, the motion of an external gear ring at the upper part of the double-layer slewing bearing 2 is transmitted to the ball screw mechanism 26 by meshing with the synchronous pinion 3 through external teeth, a screw sleeve 28 of the ball screw mechanism 26 is fixed on a pull rod guide roller seat 27 of the trunnion ring assembly 25, the slewing motion of the ball screw mechanism 26 drives the trunnion ring assembly 25 to translate up and down, and the rotary motion of the trunnion rotating sleeve 7 is coupled with a thumb wheel component 23 fixed on an inner ring of a slewing bearing 22 at the lower part of the trunnion ring assembly 25 to rotate together through the guiding of a vertical slideway 21 of the trunnion rotating sleeve; the crank 17 is mounted on the trunnion 16 splines and the transverse slide way 18 (also called left and right guide groove) is mounted on the inner ring of the rotary support 22 at the lower part of the trunnion ring assembly 25. The up-and-down translation of the backing ring assembly 25 is converted into the tilting and spiral motion of the distribution chute 20 through a crank slider mechanism, and the principle and the structure are very simple.

In the specific arrangement, two power integrated transmission units are arranged on the top cover 4, and transmission components including a ball screw mechanism 26, a backing ring assembly 25, a double-layer pivoting support 2 and the like are arranged in a closed space.

The transmission of the ball screw pair has good synchronization performance, and three sets of same ball screw mechanisms are uniformly distributed (at intervals of 120 degrees) on the top cover 4 along the same circumference of the energy-saving distributor.

The inner cylindrical surface of the middle part of the trunnion rotating sleeve 7 and the outer cylindrical annular surface of the central throat pipe 1 are sealed: a combined sealing device is adopted, and a front labyrinth seal, a packing seal, a lapping surface seal and an extrusion type seal are arranged to seal the blast furnace gas in three stages.

The outer cylindrical surface of the lower part of the trunnion rotating sleeve 7 and the inner cylindrical annular surface of the water-cooling chassis 10 are sealed: a sealing combination device fixed by a sealing element is adopted, and the blast furnace gas is sealed in three stages by a preposed labyrinth seal, a packing seal, a lapping surface seal and an extrusion seal.

The utility model provides a combined cooling and combined sealing of a closed space for installing a transmission device in an energy-saving distributing device box body, thereby obtaining a closed space with proper temperature for arranging the transmission device of the distributing device; the transmission efficiency of the ball screw pair is as high as 90-96%, and three sets of ball screw pairs with the same lead can obtain good synchronization performance; the utility model provides a simple structure's energy-saving distributing device of blast furnace roof based on ball screw mechanism adopts ball screw and slider-crank mechanism, simplifies the inner structure of distributing device gear box, simple structure, reliable and stable.

The tilting power supply components of the distribution chute of the energy-saving distributor are integrated to form an alpha angle integrated transmission unit, a worm speed reducer which cannot be inversely transmitted is adopted in a transmission part, an absolute value encoder and a master controller are adopted in a control part and are installed on a top cover of the energy-saving distributor, a tilting pinion of an output end is controlled by the absolute value encoder and the master controller, and the installation and the maintenance are simple, convenient and easy.

The energy-saving distributing device is characterized in that power supply components for rotating the distributing chute of the energy-saving distributing device are integrated to form a beta angle integrated transmission unit, a worm speed reducer which can not be reversely transmitted is adopted in a transmission part, an absolute value type encoder and a proximity switch are adopted in a control part, the worm speed reducer is installed on a top cover of the energy-saving distributing device, a rotary pinion of an output end is controlled by the absolute value type encoder and the proximity switch, and the installation and maintenance are simple, convenient and easy to implement.

The energy-saving distributing device is arranged in the closed space, and the transmission device is used for synthesizing and jointly controlling the two motions to drive the distributing chute to tilt and rotate, so that the rapid rotation distribution, the spiral distribution, the fixed-point distribution, the fan-shaped distribution and the like are realized.

Drawings

FIG. 1 is a structural diagram of an energy-saving distributor at the top of a blast furnace, which reflects the tilting of a distribution chute, according to the utility model;

FIG. 2 is a structural diagram of an energy-saving distributor at the top of a blast furnace reflecting the rotation of a distribution chute according to the utility model;

FIG. 3 is a top view of FIG. 1 and FIG. 2;

FIG. 4 is a diagram of part I of FIG. 1, which reflects the application of the "water-cooling gas-tight box combination sealing device of blast furnace ironmaking distributor" in the energy-saving distributor;

fig. 5 is a diagram of part II of fig. 1, which reflects the application of the patent "sealing assembly for fixing a sealing member of a water-cooling airtight box of a blast furnace iron-making distributor" in the energy-saving distributor.

Detailed Description

Referring to fig. 1, 2 and 3, the present invention is composed of a central throat pipe 1, a top cover 4, a box body 24, a water-cooled chassis 10, a trunnion rotating sleeve 7, a trunnion ring assembly 25, a distribution chute 20, a bracket 5, a trunnion 16, a crank 17, a ball screw mechanism 26, an alpha angle integrated transmission unit 29 and a beta angle integrated transmission unit 33; the ball screw mechanism 26, the α -angle integrated transmission unit 29, and the β -angle integrated transmission unit 33 are provided on the top cover 4.

Referring to fig. 1, the central throat pipe 1 is composed of a water distribution plate 12, a crack water jacket 13 and a sealing bottom plate 14.

Referring to fig. 1, the trunnion ring assembly 25 is composed of a transverse slide way 18, a pull rod guide roller seat 27, a lower slewing bearing 22 and a thumb wheel component 23.

Referring to fig. 1, the trunnion swivel sleeve 7 includes a vertical slide.

Referring to fig. 1, the ball screw mechanism 26 is composed of a synchronizing pinion 3 and a screw housing 28.

Referring to fig. 3, the α -angle integrated transmission unit 29 is composed of an absolute value encoder 30, a master controller 31, and a tilt pinion 32.

Referring to fig. 3, the β -angle integrated transmission unit 33 is composed of an absolute value encoder 34, a proximity switch 35, and a rotary pinion 36.

Referring to fig. 3, the trunnion 16 is mounted on the middle of the trunnion rotating sleeve 7, and the crank 17 and the bracket 5 are mounted on both sides of the trunnion rotating sleeve in a spline connection manner.

In the attached drawings 1-3, the cooling part of the energy-saving distributor for blast furnace ironmaking is realized, the closed space of the energy-saving distributor for installing the transmission device thereof is composed of a central throat pipe 1, a top cover 4, a box body 24, a water-cooling chassis 10 and a trunnion rotating sleeve 7, and the cooling of the closed space is carried out by adopting a patent technology (a cooling device of a water-cooling airtight box combination of a blast furnace ironmaking distributor, namely, the patent number ZL 202020144690.9).

The energy-saving distributor is used for cooling a closed space for installing a transmission device by adopting combined cooling, firstly, a central throat pipe 1 is cooled by a crack water jacket 13, high-pressure cooling water flows in from an inlet of a water distribution disc 12, flows downwards and upwards in the crack water jacket 13 along the circumferential crack of the water jacket in a turning way for four times and then flows out from an outlet of the water distribution disc 12, and heat transfer and film layer heat exchange of the inner wall of the central throat pipe 1 are carried away by heat in the cooling water. Secondly, heat insulation is achieved, the first aluminum silicate fiber felt 6 is attached to the inner portion of the middle section of the trunnion rotating sleeve 7 and fixed through a cover 15, and the heat insulation effect is achieved. A plurality of small spaces are formed at the lower part of the water-cooling chassis 10, and an aluminum silicate fiber felt II 9 is plugged in the small spaces and fixed by a stainless steel thin steel plate 8 to play a role in heat insulation. Thirdly, the plane of the water-cooling chassis 10 is spirally cooled, and two high-pressure circulating cooling water flows spirally in the water-cooling chassis 10 to take away heat conducted to the water-cooling chassis 10. The energy-saving distributing device has good cooling effect and heat insulation effect, ensures that the temperature of the closed space of the transmission device is within an allowable range (below 50 ℃), ensures the temperature of the middle part of the trunnion rotating sleeve 7, the central throat pipe 1, the lower part of the trunnion rotating sleeve 7 and the sealed cylindrical ring surface of the water-cooling chassis 10, and creates temperature conditions for contact sealing.

In the attached figure 1, the energy-saving distributor for blast furnace ironmaking is realized by a sealing part, and sealing of a trunnion rotating sleeve 7 and a cylindrical ring surface of a central throat pipe 1 is realized by adopting a patent technology (a water-cooling air-tight box combined sealing device of the distributor for blast furnace ironmaking, the patent number is ZL 202020144764.9).

In the attached figure 1, the energy-saving distributor for blast furnace ironmaking is realized by a sealing part, and sealing of a trunnion rotating sleeve 7 and a cylindrical ring surface of a water-cooling chassis 10 is realized by adopting a patent technology (a sealing combination device for fixing a sealing element of a water-cooling airtight box of the distributor for blast furnace ironmaking, the patent number is ZL 202020144722.5).

The third-stage extrusion type contact type sealing of the two sealing technologies inevitably generates the trend that furnace gas leaks into a sealed area due to the abrasion and consumption of materials, and nitrogen is filled into the sealed space area of the transmission device for reverse balance sealing, so that no furnace gas is mixed in the sealed area. The nitrogen gas sealing consumption of the material distribution device used in each iron and steel plant at present is 800-1500 Nm³More than h, considerable nitrogen energy consumption in one year, thousands of yuan, and the nitrogen sealing consumption of the energy-saving distributor can be controlled within 0-100 Nm³Within the range of/h, the concrete implementation is as follows: when the nitrogen gas is consumed in sealing mode more than 100Nm³And when the pressure is over/h (the set value of the nitrogen consumption of the seal), the graphite packing is replaced for the third-stage seal, so that the reliability of the extrusion contact seal is ensured, the replacement and maintenance time is short, and the operation is convenient.

In the attached drawings 1-3, the transmission part of the energy-saving distributor for blast furnace ironmaking is realized, and the energy-saving distributor is provided with a closed space of a transmission device, which is formed by a central throat pipe 1, a top cover 4, a box body 24, a water-cooling chassis 10 and a trunnion rotating sleeve 7, and has a good working environment; the transmission efficiency of the ball screw pair is as high as 90-96%, and three sets of ball screw pairs with the same lead can obtain good synchronization performance; the method is realized based on the ball screw mechanism in the following way: the energy-saving distributing device is arranged on a furnace top steel ring 11, the bracket 5 is arranged on a trunnion 16 spline arranged in the middle of a trunnion rotating sleeve 7 of the energy-saving distributing device, and a distributing chute 20 of the energy-saving distributing device is hung and clamped and combined to be hung on the bracket 5. The trunnion rotating sleeve 7 is connected with an outer gear ring at the lower end of the double-layer slewing bearing 2, a beta angle integrated transmission unit 33 is arranged on the top cover 4 of the distributing device, and an output end rotating pinion 36 controlled by an absolute value type encoder 34 and a proximity switch 35 is meshed with the outer gear ring at the lower part of the double-layer slewing bearing 2, so that the rotary motion, the fan-shaped motion and the fixed-point motion of the distributing chute 20 of the distributing device are realized. The alpha angle integrated transmission unit 29 is arranged on the top cover 4 of the distributing device, and an output end tilting pinion 32 controlled by an absolute value encoder 30 and a master controller 31 is meshed with an outer gear ring on the upper part of the double-layer slewing bearing 2 for transmission; three identical ball screw mechanisms 25 are uniformly and vertically arranged on the top cover 4 along the same circumference and extend into the box body 24, the upper part of the top cover is provided with a synchronous pinion 3, the motion of an outer gear ring from the upper part of the double-layer slewing bearing 2 is transmitted to the ball screw mechanism 26 through the meshing of outer teeth and the synchronous pinion 3 of the ball screw mechanism 26, a screw sleeve 28 of the ball screw mechanism 26 is fixed on a pull rod guide roller seat 27 of the trunnion ring component 25, the slewing motion of the ball screw mechanism 26 drives the trunnion ring component 25 to translate up and down, and the rotary motion of the trunnion rotating sleeve 7 is coupled with a thumb wheel component 23 fixed on the inner ring of a slewing bearing 22 at the lower part of the trunnion ring component 25 to rotate together through the guiding of a vertical slideway 21 of the trunnion rotating sleeve 7; the crank 17 is arranged on a spline of the trunnion 16, the transverse slideway 18 (also called a left guide groove and a right guide groove) is arranged on an inner ring of a slewing bearing 22 at the lower part of the trunnion ring component 25, the trunnion ring component 25 translates up and down through a crank-slider mechanism to be converted into tilting and spiral motion of the distribution chute 20, and the principle and the structure are very simple. In the specific arrangement, two power integrated transmission units are arranged on the top cover 4 of the energy-saving distributing device, and transmission components including a ball screw mechanism 26, a backing ring assembly 25, a double-layer slewing bearing 2 and the like are arranged in a closed space. The ball screw pair transmission has good synchronization performance, the energy-saving distributing device is provided with three sets of the same ball screw mechanisms uniformly distributed (at intervals of 120 degrees) along the same circumference on the top cover 4, the box body 24 is provided with three maintenance manholes 37, and the maintenance is very convenient.

Claims

1. The utility model provides a blast furnace ironmaking energy-saving distributing device which characterized in that: the distributing device comprises a central throat pipe (1), a double-layer slewing bearing (2), a top cover (4), a box body (24), a water-cooling chassis (10), a trunnion rotating sleeve (7), a trunnion ring assembly (25), a distributing chute (20), a bracket (5), a trunnion (16) and a crank (17);

the top cover (4) is provided with a ball screw mechanism (26), an alpha angle integrated transmission unit (29) and a beta angle integrated transmission unit (33); the central throat pipe (1) consists of a water distribution plate (12), a crack water jacket (13) and a sealing bottom plate (14); the trunnion ring assembly (25) consists of a transverse slideway (18), a pull rod guide roller seat (27), a lower slewing bearing (22) and a thumb wheel component (23); the trunnion rotating sleeve (7) comprises a vertical slideway; the ball screw mechanism (26) consists of a synchronous pinion (3) and a screw sleeve (28); the alpha angle integrated transmission unit (29) consists of a first absolute value encoder (30), a master controller (31) and a tilting pinion (32); the beta angle integrated transmission unit (33) consists of a second absolute value encoder (34), a proximity switch (35) and a rotary pinion (36);

the trunnion (16) is arranged on the middle part of the trunnion rotating sleeve (7), and the crank (17) and the bracket (5) are arranged on the two sides in a spline connection mode; the distributor is arranged on a furnace top steel ring (11), the bracket (5) is arranged on a trunnion (16) spline arranged in the middle of a trunnion rotating sleeve (7), and a distribution chute (20) of the energy-saving distributor is hung on the bracket (5) in a clamping and hanging manner; the trunnion rotating sleeve (7) is connected with an outer gear ring at the lower end of the double-layer slewing bearing (2), a beta angle integrated transmission unit (33) is installed on a top cover (4) of the distributing device, a second absolute value type encoder (34), a proximity switch (35) and a rotary pinion (36) are sequentially connected, and the rotary pinion (36) is meshed with the outer gear ring at the lower part of the double-layer slewing bearing (2); the alpha-angle integrated transmission unit (29) is arranged on a top cover (4) of the distributing device, a first absolute value type encoder (30), a master controller (31) and a tilting pinion (32) are sequentially connected, and the tilting pinion (32) is meshed with an outer gear ring on the upper part of the double-layer slewing bearing (2) to perform transmission; a ball screw mechanism (26) is vertically arranged on the top cover (4) and extends into the box body (24), a synchronous pinion (3) is arranged at the upper part of the ball screw mechanism (26), the motion from an outer gear ring at the upper part of the double-layer slewing bearing (2) is transmitted to the ball screw mechanism (26) through the meshing of outer teeth and the synchronous pinion (3), a screw sleeve (28) of the ball screw mechanism (26) is fixed on a pull rod guide roller seat (27) of a trunnion ring assembly (25), the slewing motion of the ball screw mechanism (26) drives the trunnion ring assembly (25) to translate up and down, and the rotary motion of a trunnion rotating sleeve (7) is coupled with a shifting wheel component (23) fixed on an inner ring of a slewing bearing (22) at the lower part of the trunnion ring assembly (25) through the guide of a vertical slideway (21) to rotate together; the crank (17) is arranged on the spline of the trunnion (16), and the transverse slideway (18) is arranged on the inner ring of the rotary support (22) at the lower part of the trunnion ring component (25).

2. The blast furnace ironmaking energy-saving distributor according to claim 1, characterized in that: three sets of same ball screw mechanisms are uniformly arranged on the top cover (4) along the same circumference.

3. The blast furnace ironmaking energy-saving distributor according to claim 1, characterized in that: the trunnion rotating sleeve (7) is sealed with the cylindrical ring surface of the matching surface of the central throat pipe (1).

4. The blast furnace ironmaking energy-saving distributor according to claim 1, characterized in that: the trunnion rotating sleeve (7) is sealed with the cylindrical ring surface of the matching surface of the water-cooling chassis (10).