CN113510264A

CN113510264A - Blast furnace tuyere big sleeve boring device

Info

Publication number: CN113510264A
Application number: CN202010279873.6A
Authority: CN
Inventors: 陈晓光; 杨树新; 袁军; 王�锋; 徐海涛; 赵玉章; 卞大诚; 周斌; 刘浩
Original assignee: Qinhuangdao Qinye Heavy Industry Co ltd
Current assignee: Qinhuangdao Qinye Heavy Industry Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2021-10-19

Abstract

The embodiment of the invention provides a blast furnace tuyere large sleeve boring device, which comprises: a power system; the main shaft assembly comprises a hollow main shaft, and the main shaft is in transmission connection with the power system; the positioning support is connected with the main shaft assembly and is used for positioning the main shaft relative to the tuyere large sleeve; the feeding frame is fixedly connected with the main shaft and provided with a strip-shaped groove, and an included angle between the strip-shaped groove and the axis of the main shaft is equal to the processing inclination of the tuyere large sleeve; the broach mechanism comprises a feed screw, the feed screw penetrates through the main shaft, and the feed screw is in transmission connection with the main shaft; the tool rest assembly is in threaded connection with the feed screw rod, and the feed screw rod drives the tool rest assembly to axially feed; the tool rest assembly is in sliding fit with the strip-shaped groove of the feeding frame, and when the tool rest assembly is axially fed, the feeding frame drives the tool rest assembly to radially feed. The invention has the characteristics of uniform cutting and convenient operation.

Description

Blast furnace tuyere big sleeve boring device

Technical Field

The invention belongs to the technical field of metal cutting equipment, and particularly relates to a blast furnace tuyere large sleeve boring device.

Background

The tuyere large sleeve is an essential key part for blowing hot air into the blast furnace during iron making. When the blast furnace operates, hot air at 1200-1300 ℃ enters the furnace body and passes through the tuyere. The tuyere large sleeve part comprises a tuyere flange, a tuyere large sleeve, a tuyere middle sleeve, a small sleeve pressing device and the like. Normally, the tuyere flange and the tuyere large sleeve are not replaced within the first furnace life, so the manufacturing quality of the tuyere flange and the tuyere large sleeve, particularly the processing quality of the contact surface of the large sleeve and the middle sleeve, is very strict to ensure the sealing property of tuyere equipment. The tuyere large sleeve of the blast furnace body needs to be processed on site during construction or maintenance, and the deformation and the reserved processing amount generated by the on-site welding and installation of the tuyere large sleeve during blast furnace construction are cut off by boring, so that the sealing between the tuyere large sleeve and the middle sleeve and the centering position of each sleeve are ensured.

The number of blast furnace tuyeres is about 2-4 times of the diameter meter of a furnace hearth, and the number of the blast furnace tuyeres above 2000 vertical is more than 30. The tuyere large sleeve and the middle sleeve are sealed by conical surfaces, self-locking is realized by conical surface contact, and the outer sides are generally compressed by threads. The roughness of the conical surface of the tuyere is required to exceed Ra3.2, and the gas cushion is prevented from hot air leakage by adding mixed sealing. The blast furnace tuyere is formed by sequentially connecting a large sleeve, a middle sleeve and a small sleeve, and the large sleeve and a furnace shell are welded into a whole. The furnace body generally generates +/-5 mm deformation in the radial direction during the field construction process. At present, the deformation correction processing speed is low, the processing precision is low, and the quality of a processed surface is poor. The large set of correction has long construction period and influences the construction progress of the blast furnace; the large sleeve has low processing precision and leaves potential safety hazard on the operation of the blast furnace.

Disclosure of Invention

In view of the above problems in the prior art, an object of the embodiments of the present invention is to provide a blast furnace tuyere large sleeve boring device, which has the characteristics of uniform cutting and convenient operation.

The embodiment of the invention provides a blast furnace tuyere large sleeve boring device, which comprises:

a power system;

the main shaft assembly comprises a hollow main shaft, the main shaft is in transmission connection with the power system, and the power system is used for driving the main shaft to rotate;

the positioning support is connected with the main shaft assembly and is used for positioning the main shaft relative to the tuyere large sleeve;

the feeding frame is fixedly connected with the main shaft and provided with a strip-shaped groove, and an included angle between the strip-shaped groove and the axis of the main shaft is equal to the processing inclination of the tuyere large sleeve;

the broach mechanism comprises a feed screw, the feed screw penetrates through the main shaft, and the feed screw is in transmission connection with the main shaft;

the tool rest assembly is in threaded connection with the feed screw rod, and the feed screw rod drives the tool rest assembly to axially feed; the tool rest assembly is in sliding fit with the strip-shaped groove, and when the tool rest assembly is axially fed, the feeding frame drives the tool rest assembly to radially feed.

Optionally, the spindle assembly further includes:

the bearing seat is used for being fixedly connected with the positioning support;

and the precision bearing is fixedly sleeved on the main shaft and fixedly assembled on the bearing seat.

Optionally, the locating support includes two cross support frames, two the cross support frame is located the both sides of bearing frame, the cross support frame includes:

the supporting seat is used for being fixedly connected with the bearing seat of the main shaft assembly;

one end of each of the four threaded rods is in threaded connection with the support seat, the threaded rods are uniformly distributed in the circumferential direction of the support seat and are arranged along the radial direction of the main shaft, so that the straight lines where the four threaded rods are located form a cross shape;

and the four supporting blocks are respectively connected with the other ends of the four threaded rods through self-aligning bearings.

Optionally, the projections of the two cross supports in the axial direction of the main shaft are in a shape of a Chinese character 'mi'.

Optionally, the feeding frame comprises:

the clamping seat is used for being fixed with the main shaft;

the inclined groove plate is provided with the strip-shaped groove, and the clamping seat is fixedly connected with one end of the inclined groove plate;

and the connecting cover is used for being fixed with the main shaft and is fixedly connected with the other end of the inclined groove plate.

Optionally, the broach mechanism further includes:

the tool setting hand wheel is fixedly connected with one end of the feed screw;

the feeding gear set is used for driving and connecting the feeding screw rod and the spindle, and the spindle drives the feeding screw rod to rotate through the feeding gear set;

and the screw rod seat realizes the positioning and the rotary supporting of the feed screw rod through a bearing, and the screw rod seat is fixed with the supporting seat of the positioning supporting.

Optionally, the feed gear set includes:

the driving gear is fixedly sleeved on the main shaft;

the driven gear is fixedly sleeved on the feed screw;

and the reduction gear is connected with the driving gear and the driven gear and is used for adjusting the transmission ratio of the driving gear and the driven gear.

Optionally, the tool holder assembly comprises:

the sliding cutter bar comprises an assembly part, a sliding rod connected with the assembly part and a counterweight rod connected with the assembly part, the sliding rod and the counterweight rod are respectively arranged on two sides of the assembly part, the sliding rod and the counterweight rod are coaxially arranged and are perpendicular to the main shaft, the assembly part is slidably sleeved on the main shaft, and the assembly part and the main shaft are circumferentially limited;

the screw rod nut is fixed with the sliding cutter rod and is in threaded fit with the feed screw rod;

the knife sleeve is sleeved on the sliding rod in a sliding manner;

the push rod is in threaded connection with the cutter sleeve, one end of the push rod is in sliding connection with the sliding rod, and the push rod is used for driving the cutter sleeve to move along the sliding rod;

the cutter head is connected with the cutter sleeve;

and the balance weight is connected with the balance weight rod and used for balancing the dynamic balance of the whole tool rest by adjusting the position of the balance weight on the balance weight rod.

Optionally, the tool sleeve has an open thread that is threadedly engaged with the push rod.

Optionally, the push-type broach rod includes:

the fixing part is connected with the assembling part in a sliding manner and is matched with the strip-shaped groove in a sliding manner;

one end of the threaded rod is rotatably connected with the fixing part, and the threaded rod is in threaded fit with the cutter sleeve;

a hand wheel fixed to the other end of the threaded rod;

and the dial is fixedly connected with the threaded rod.

Compared with the prior art, the blast furnace tuyere large sleeve boring device provided by the embodiment of the invention realizes axial feeding through gear differential feeding of the main shaft and the feed screw, so that the cutting of a cutter is more uniform, the machined surface roughness is smoother, the sealing performance of the tuyere large sleeve is improved, and the service life of the tuyere large sleeve is prolonged.

The use and the operation are more convenient and faster, the manual interference is not needed in the processing of each cutter after the positioning and the alignment, and the equipment operation is stable and reliable. Both the electric variable frequency speed regulation and the hydraulic motor speed regulation are easy to control in operation.

Compact structure, stable positioning between the equipment and the tuyere large sleeve, few links of transportation, installation and debugging, and easy maintenance and preservation in field use.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

The summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the inventive embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

FIG. 1 is a schematic connection diagram of parts of a blast furnace tuyere large sleeve boring device according to an embodiment of the invention.

FIG. 2 is a schematic view of a main shaft assembly of the blast furnace tuyere large sleeve boring device according to the embodiment of the present invention.

FIG. 3 is a schematic view of a positioning support of a blast furnace tuyere large sleeve boring device according to an embodiment of the invention.

FIG. 4 is a schematic view of a feeding frame of a blast furnace tuyere large sleeve boring device according to an embodiment of the present invention.

FIG. 5 is a schematic view of a broach mechanism of a blast furnace tuyere large sleeve boring device according to an embodiment of the present invention.

FIG. 6 is a schematic view of a tool rest assembly of the blast furnace tuyere large sleeve boring device according to the embodiment of the invention.

FIG. 7 is a schematic view of a blast furnace tuyere large sleeve boring device according to an embodiment of the present invention.

Fig. 8a and 8b are schematic diagrams of the action of a feeding gear of the blast furnace tuyere large sleeve boring device according to the embodiment of the invention, wherein fig. 8a is a schematic diagram of the disengagement of the feeding gear, and fig. 8b is a schematic diagram of the engagement of the feeding gear.

FIG. 9 is a schematic view of the radial feed of the blast furnace tuyere large sleeve boring device according to the embodiment of the present invention.

FIG. 10 is a schematic sectional view showing the shaft of the blast furnace tuyere large sleeve boring device according to the embodiment of the present invention.

FIG. 11 is a schematic sectional view of the assembly of a tool rest shaft seat of a blast furnace tuyere large sleeve boring device according to an embodiment of the invention.

Reference numerals:

1-a spindle assembly; 2-positioning and supporting; 3-a feeding frame; 4-a broach mechanism; 5-a tool rest assembly; 6-tuyere large sleeve; 7-a power system; 101-a main shaft; 102-a bearing seat; 103-precision bearings; 202-a support seat; 203-threaded rod; 201-supporting block; 204-self-aligning bearing; 301-a holder; 302-a sloted plate; 303-a connection cover; 320-a strip-shaped groove; 401-tool setting hand wheel; 402-a feed gear set; 403-feed screw; 404-a screw seat; 501-a cutter head; 502-a knife pouch; 503-pushing the cutter bar; 504-lead screw nut; 505-sliding knife bar; 506-a counterweight; 531-fixed part; 532-threaded rod; 533-hand wheel; 534-slider.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.

The embodiment of the invention provides a blast furnace tuyere large sleeve boring device. Referring to fig. 1, the blast furnace tuyere large sleeve boring device comprises:

a power system 7;

the main shaft assembly 1 comprises a hollow main shaft 101, the main shaft 101 is in transmission connection with the power system 7, and the power system 7 drives the main shaft 101 in the main shaft assembly 1 to rotate;

the positioning support 2 is connected with the main shaft assembly 1 and is used for positioning the main shaft 101 relative to the tuyere large sleeve 6;

the feeding frame 3 is fixedly connected with the main shaft 1, the feeding frame 3 is provided with a strip-shaped groove 320, and the included angle between the strip-shaped groove and the axis of the main shaft is equal to the processing inclination of the tuyere large sleeve 6;

the broach mechanism 4 comprises a feed screw 403, the feed screw 403 is arranged in the main shaft 101 in a penetrating way, and the feed screw 403 is in transmission connection with the main shaft 101; the feed screw 403 can move relative to the main shaft 101 in the axial direction under the driving of the main shaft 101, so as to realize axial feeding;

the tool rest assembly 5 is in threaded connection with a feed screw 403, and the feed screw 403 drives the tool rest assembly to axially feed; the tool rest assembly 5 is in sliding fit with the strip-shaped groove 320 of the feeding frame 3, and when the tool rest assembly 5 axially feeds, the feeding frame 3 drives the tool rest assembly 5 to radially feed.

The blast furnace tuyere large sleeve boring device provided by the embodiment of the invention realizes axial feeding through gear differential feeding of the main shaft 101 and the feed screw 403, and the tool rest assembly 5 is in sliding fit with the strip-shaped groove 320 of the feed frame 3 to realize radial feeding, so that the cutting of a tool is more uniform, the processed surface roughness is smoother, the sealing performance of the tuyere large sleeve is improved, and the service life of the tuyere large sleeve is prolonged.

The blast furnace tuyere large sleeve boring device provided by the embodiment of the invention is more convenient and faster to use and operate. After positioning and alignment, manual interference is not needed in processing of each cutter, and the equipment is stable and reliable in operation. Both the electric variable frequency speed regulation and the hydraulic motor speed regulation are easy to control in operation.

The blast furnace tuyere large sleeve boring device provided by the embodiment of the invention has the advantages of compact structure, stable positioning of equipment and the tuyere large sleeve, few links of transportation, installation and debugging, and easy maintenance and storage in field use.

In some embodiments, the spindle assembly 1 further comprises a bearing block 102 and a precision bearing 103. The bearing seat 102 is used for fixedly connecting with the positioning support 2. The precision bearing 103 is fixedly sleeved on the main shaft, and the precision bearing 103 is fixedly assembled on the bearing block 102. The precision bearing 103 constrains the spindle to rotate in the bearing housing. The main shaft 101 is driven by an external power system to rotate, and transmits power of the external power system to the device processing rotating mechanism. The main shaft 101 ensures the rigidity, strength, stability in movement, and the like of the system. The main shaft 101 is a hollow shaft. The broach mechanism 4 is installed inside the main shaft 101, and the broach mechanism 4 realizes axial feeding of a tool.

Referring to fig. 10, in some embodiments, the positioning support 2 includes two cross-shaped support brackets disposed on both sides of the bearing seat 102. The cross support frame comprises a support seat 202, a threaded rod 203, a support block 201 and a self-aligning bearing 204.

Referring to fig. 10, the supporting seat 202 is used for fixedly connecting with the bearing seat 102 of the spindle assembly 1. The support base 202 may be disc-shaped. The support base 202 has a screw-threaded portion in the circumferential direction for connecting the threaded rod 203. The threaded connections are evenly distributed in the circumferential direction of the support base 202. The screw connection portion may be formed by forming a screw hole in the circumferential direction of the support base 202. The threaded connection portion may be formed by providing a connecting cylinder having an internal thread in the circumferential direction of the support base 202. The number of the threaded portions may be a multiple of the number of the threaded rods 203, or the same as the number of the threaded rods 203. For example, when the number of the threaded rods 203 is four, the number of the threaded portions may be four or 8. Threaded rod 203 is four, and the one end and the supporting seat 202 threaded connection of four threaded rods 203, threaded rod 203 are evenly distributed in the circumference of supporting seat 202, and threaded rod 203 along the radial setting of main shaft 101 to the straight line that makes four threaded rods 203 place forms the cross, and four threaded rods 203 are the cross promptly and are connected with supporting seat 202. The supporting block 201 is connected with the other end of the threaded rod 203 through a self-aligning bearing 204. Each cross support frame is an adjustable 4-point support, and the cross shape is favorable for calculating the adjustment amount.

In the exemplary embodiment, the projections of the two cross supports in the axial direction of the main shaft 101 are in a shape of a Chinese character mi.

Two cross support frames are paired to form a supporting structure shaped like a Chinese character mi, the whole tuyere large sleeve boring device can be fixed, and the axis alignment is realized through the matching and adjustment of the support legs. The threaded rod 203 adjusts the supporting length, and the self-aligning bearing 204 realizes ideal contact between the supporting block 201 and the fixed surface, so that the whole positioning is stable, and the equipment is not influenced by vibration during processing and running.

In some embodiments, the feeding frame 3 comprises a holder 301, a chute plate 302 and a connection cover 303.

The holder 301 is used to fix the spindle 101. The inclined groove plate 302 is provided with a strip-shaped groove 320, and the included angle between the strip-shaped groove 320 and the axis of the main shaft 101 is equal to the processing inclination of the tuyere large sleeve. The holder 301 is fixedly connected with one end of the chute plate 302. The connecting cover 303 is used for being fixed with the main shaft 101, and the connecting cover 303 is fixedly connected with the other end of the chute plate 302. The holder 301 can be fixed to the spindle 101. The connection cover 303 may be fixed with the end of the main shaft 101.

The feeding frame 3 is fixed to the main shaft 101 through the holder 301 and the connection cover 303, and a stable structure can be formed at the distal end of the main shaft 101. The groove 320 of the chute plate 302 is formed according to the inclination required for processing, and the chute plate 302 can be obtained by processing the obliquely arranged groove 320 on a flat plate. Referring to fig. 9, when the boring device is operated, the push rod 503 in the tool holder assembly 5 is engaged with the strip-shaped groove 320, and the push rod 503 slides along the strip-shaped groove 320 to realize radial feeding of the tool holder assembly.

In some embodiments, the broaching mechanism 4 also includes a pair of knife handwheels 401, a feed gear set 402, and a lead screw base 404.

The tool setting hand wheel 401 is fixedly connected with one end of a feed screw 403. By operating the tool setting hand wheel 401, the feed screw 403 can be rotated, so that tool setting before processing and tool retracting after each tool is processed are realized.

The feed gear set 402 is used for driving and connecting the feed screw 403 and the main shaft 101, and the main shaft 101 drives the feed screw 403 to rotate through the feed gear set 402. Axial feeding is realized through gear differential feeding of the main shaft 101 and the feed screw 403, so that cutting tools are cut more uniformly, the machined surface roughness is smoother, the sealing performance of the tuyere large sleeve is improved, and the service life of the tuyere large sleeve is prolonged.

The screw base 404 realizes positioning and rotational support of the feed screw 403 by a bearing. The screw base 404 may be fixed to the connection cover 303 of the feeding frame 3.

The feed screw 403 is matched with a screw nut 504 in the tool rest assembly 5, and when the feed screw 403 rotates, the feed screw drives and pulls the tool rest assembly 5 to move axially, so that axial feeding is realized. The feed gear set 402 obtains power from the main shaft 101 to drive the feed screw 403 to rotate, and the feed gear set 402 decelerates to obtain a reasonable feed amount. The tool setting hand wheel 401 is used for setting tools before machining and retracting tools after machining of each tool is completed, when the tool setting hand wheel is used, the feed gear set 402 is disengaged, and the tool setting hand wheel 401 drives the feed screw 403 to rotate so as to realize axial translation of the tool rest assembly 5 and reach a machining initial position. Thereby rapidly moving the tool holder assembly.

In the exemplary embodiment, the feed gear set 402 includes a drive gear, a driven gear, and a reduction gear with the drive gear secured to the main shaft 101. The driven gear is fixedly sleeved on the feed screw 403. The reduction gear is connected with the driving gear and the driven gear, and the reduction gear is used for adjusting the transmission ratio of the driving gear and the driven gear.

In some embodiments, tool holder assembly 5 includes a sliding tool bar 505, a lead screw nut 504, a tool holder 502, and a push rod 503.

The sliding cutter bar 505 comprises an assembly part, a sliding rod connected with the assembly part and a counterweight rod connected with the assembly part, the sliding rod and the counterweight rod are respectively arranged at two sides of the assembly part, the sliding rod and the counterweight rod are coaxially arranged and are perpendicular to the main shaft, the assembly part is sleeved on the main shaft in a sliding manner, and the assembly part is circumferentially limited with the main shaft.

The lead screw nut 504 is fixed to the slide bar 505, and the lead screw nut 504 is screw-fitted to the feed lead screw 403. In the exemplary embodiment, the lead screw nut 504 is fixed with a fitting portion of the slide knife bar 505. When the feed screw 403 rotates, the screw nut 504 moves axially, and the slide bar 505 moves axially therewith.

The knife sheath 502 is slidably sleeved on the sliding rod. The knife pouch 502 slides along the slide bar to achieve radial feed. The tool holder 502 is used for assembling the tool bit 501.

The push knife rod 503 is connected with the knife sleeve 502 through threads, one end of the push knife rod 503 is connected with the sliding knife rod 505 in a sliding mode, and the push knife rod 503 is used for driving the knife sleeve 502 to move along the sliding rod. The pusher bar 503 is slidably engaged with the strip groove 320 of the feed frame 3. When the push rod 503 is driven by the sliding rod 505 to move axially, because a certain angle is formed between the strip-shaped groove 320 and the axial direction, under the restriction of the strip-shaped groove 320, when the push rod 503 slides relative to the sliding rod 505, the push rod 503 drives the cutter sleeve 502 to move along the sliding rod, thereby realizing radial feeding.

The cutting head 501 is connected with a cutter sleeve 502.

The balance weight is connected with the balance weight rod, and the dynamic balance of the whole tool rest is balanced by adjusting the position of the balance weight on the balance weight rod.

The cutter head 501 is fastened on the cutter sleeve 502, the cutter sleeve 502 can slide on the sliding cutter rod 505, and the position of the counterweight is adjusted to realize dynamic balance. The adjusted counterweight is fixedly connected with the sliding knife bar 505. The screw nut 504 is tightly connected with the sliding cutter bar 505, and when the feed screw 403 acts on the screw nut 504, the screw nut 504 drives the sliding cutter bar 505 to realize axial feeding together. One end of the push rod 503 is slidably connected with the sliding rod 505, and the other end is screwed with the cutter sleeve 502. The tool sleeve 502 slides on the sliding tool bar 505 along the radial direction of the main shaft 101 under the driving of the pushing tool bar 503, so as to realize radial feeding. The cutter head consists of a blade and a cutter handle and is divided into a rough boring mode and a fine boring mode, and redundant metal deformation and machining allowance on the tuyere large sleeve 6 are cut off directly during movement of the boring device.

In some embodiments, the sleeve 502 has open threads that threadably mate with the push rod 503. The opening thread is loosened, the push rod 503 can rotate, and the position of the knife sleeve 502 on the sliding knife rod 505 is adjusted by the thread. The open thread is tightened, and the cutter sleeve 502 is fixed with the push-type cutter bar 503. The sleeve 502 has open threads. The boring device is in threaded clamping during working.

Referring to fig. 11, in an exemplary embodiment, the pusher bar 503 may include a fixed portion 531, a threaded rod 532, and a handwheel 533. The fixing portion 531 is slidably connected to the sliding blade bar 505, and the fixing portion is slidably engaged with the strip-shaped groove 320. For example, slidably coupled to the mounting portion. One end of the threaded rod 532 is rotatably connected with the fixing part 531, and the threaded rod 532 is in threaded fit with the knife holder 502. For example, external threads on the threaded rod 532 mate with the open threads of the sleeve. The hand wheel 533 is fixed to the other end of the threaded rod 532. The dial scale is fixedly connected with the threaded rod. Threaded rod rotation relative to the static level reading.

The pushing rod 503 has a hand wheel 533 at one end, a fixed part 531 with a dial at one end, and a threaded rod 532 with fine threads at the middle section. The push rod 503 is locked and connected with the cutter sleeve 502 through the opening thread, when the thread pair is loosened, the thread pair can be read from the dial through the rotation of the threaded rod, and the processing feed amount is adjusted. After the boring device is aligned and aligned, the opening threads are clamped. The pusher bar 503 has a slider 534 that is slidably engaged with the strip-shaped groove 320 on the feed frame 3. The sliding block 534 moves under the restriction of the strip-shaped groove 320 on the feeding frame 3, and the push rod 503 is driven by the sliding block 534 to push the tool sleeve 502 to move along the radial direction of the main shaft 101, so as to realize the radial feeding of the tool bit 501. The balance weight adjusts the position on the sliding cutter bar to balance the dynamic balance of the whole cutter frame.

When the tool is adjusted through the hand wheel, the tool can be extended by clockwise rotating the tool pushing rod, and retracted by anticlockwise rotating the tool.

The radial feeding of the tuyere boring device is adjusted by using a screw, the feeding amount is readable and controllable, the preparation time before the equipment is machined and the adjustment time of a cutter in a machining room are shortened, and the machining operation efficiency of the equipment is improved. The size control of the tuyere large sleeve is more effective by the device, and the size precision is higher.

The power system 7 can be two sets of devices of an electric power system and a hydraulic power system. Can be selected according to the operation environment of a construction site. The hydraulic power system outputs torque by a hydraulic motor, and the rotating speed is controlled by a hydraulic valve bank. The electric power system outputs torque by a motor, and the frequency converter component controls the rotating speed. The two driving modes are both used for reducing the rotating speed through a speed reducer, improving the torque and obtaining the motion parameters required by the main shaft to realize the high-precision cutting of the workpiece.

The working process of the blast furnace tuyere large sleeve boring device is as follows:

1. the preparation process before processing is to select a proper hoisting or consignment tool according to the construction site environment of the blast furnace and convey the tuyere large sleeve 6 (short for a large sleeve) boring device (short for a tuyere boring device) to a tuyere platform of the blast furnace. The gap between the field platform and the furnace body can meet the requirement of personnel on operation safety or meet the requirement after being laid. The site should have a suitable stable power supply.

2. The positioning conical surface and the machining conical surface of the step inner hole of the large sleeve of the air port are cleaned, the stability of the air port boring foundation is ensured during machining operation, and the machined surface is free of impurity influence. The diameter of the positioning surface of the tuyere large sleeve is measured, and the length of eight supporting legs of the positioning support 2 is adjusted to be slightly smaller than the radius of the positioning section. And measuring and recording the vertical and horizontal diameters of the small opening of the conical surface to be processed of the tuyere large sleeve 6, and calculating and recording the processing amount. The tool holder assembly 5 should be in a shortened state ready for positioning.

3. The axial direction of a large sleeve hole is taken as a Z axis, the vertical direction is a Y axis, the horizontal direction is an X axis, the hoisting tuyere boring main machine is arranged in a large sleeve inner hole positioning step, the position of the tuyere boring Z axis is fixed according to the machining stroke, two threaded rods 203 in the vertical direction of the outer cross-shaped support frame are tightly locked, and the inner cross-shaped support frame is pre-tightened to enable the support block 201 to be in contact with the positioning surface of the tuyere large sleeve 6.

4. And (3) preliminarily aligning the coaxiality of the tuyere boring main shaft and the hole to be machined by using a proper measuring tool, and controlling the precision within 5 mm. And (3) separating a feed gear set of the broach mechanism, mounting a rough boring cutter head, adjusting a push cutter rod to enable the cutter head to be close to the large sleeve surface to be machined in the radial direction, and then adjusting the axial distance between the cutter head and the small hole of the large sleeve taper hole by using a cutter setting hand wheel to facilitate positioning and measurement.

5. The horizontal ruler determines the level of the main shaft, the manual rotary tool rest assembly corrects the distance between the tool bit and the upper, lower, left and right of the large sleeve, and if the extended length of eight threaded rods of the inner and outer two cross-shaped support frames with deviation speed regulation exists, the difference between the upper, lower, left and right distances between the main shaft and the inner hole of the large sleeve is smaller than 1 mm. And four threaded rods for fastening the outer cross support frame.

6. The cutter head is calibrated by manually rotating the cutter frame assembly, so that the distance difference between the cutter head and the inner hole of the large sleeve is less than 0.1mm, and the alignment is finished according to the air port to be processed

7. Referring to fig. 6 and 11, the tool rest assembly is adjusted according to the measured and calculated machining amount, the cutter pushing rod is rotated clockwise, the cutter extends to the required single cutting amount, a proper rough machining scheme is determined according to the reserved machining allowance and the deformation degree of the large sleeve, and referring to fig. 8a, the cutter aligning hand wheel is rotated, the tool rest assembly is pushed through the feed screw, and the tool rest assembly is close to the surface to be machined. Referring to fig. 8b, the feeding gear is engaged and fastened and locked, and after the fastening of each part is confirmed again, no other sundries exist, the equipment is lubricated well, and then the power supply of the power system is connected, and the test run is started. And (4) continuously operating and processing after no problem exists, and timely cleaning the cutter scraps in the processing until rough machining is completed.

8. And after the rough boring is finished, closing the power system and disengaging the feeding gear set. Measuring the size after machining, checking the taper of a machined surface, calculating the finish machining cutting amount according to the drawing requirement, replacing a finish boring cutter head, and rotating a push-type cutter bar to adjust the feeding of the cutter head according to the calculated machining amount. The feed gear set is engaged, the state of the equipment is checked to be good, the safety of the surrounding environment is confirmed, the power supply of the power system is switched on, the power system is adjusted to improve the rotating speed of the main shaft, finish machining is started, the cutter scraps generated in the machining process are cleaned, and the stable operation of the equipment is ensured.

9. And after the finish boring is finished and the finish boring is qualified, protecting the machined surface according to the field requirement. After the machining is finished, the tool rest assembly is adjusted to be in a shortened state, eight threaded rods of the two cross-shaped supporting frames are loosened, the air outlet boring is detached from the large sleeve, the next large sleeve to be machined is installed, and the steps are repeated until all the large sleeves of the furnace body are machined.

10. After the tuyere boring operation is finished, cleaning, lubricating and encasing and properly storing.

The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other, and it is contemplated that the embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

Claims

1. The utility model provides a big set bore hole device of blast furnace tuyere, its characterized in that includes:

a power system;

2. The blast furnace tuyere large sleeve boring device of claim 1, wherein the main shaft assembly further comprises:

3. The blast furnace tuyere large sleeve boring device as claimed in claim 2, wherein the positioning support comprises two cross supports, the two cross supports are provided at both sides of the bearing seat, the cross supports comprise:

4. The blast furnace tuyere large sleeve boring device as claimed in claim 3, wherein the projections of both said cross supports in the axial direction of said main shaft are in a shape of a Chinese character mi.

5. The blast furnace tuyere large sleeve boring device of claim 3, wherein the feeding frame comprises:

the clamping seat is used for being fixed with the main shaft;

6. The blast furnace tuyere large sleeve boring device of claim 1, wherein the broach mechanism further comprises:

7. The blast furnace tuyere large sleeve boring device of claim 6, wherein the feed gear set comprises:

the driving gear is fixedly sleeved on the main shaft;

the driven gear is fixedly sleeved on the feed screw;

8. The blast furnace tuyere large sleeve boring device of claim 1, wherein the tool rest assembly comprises:

the knife sleeve is sleeved on the sliding rod in a sliding manner;

the cutter head is connected with the cutter sleeve;

9. The blast furnace tuyere large sleeve boring device of claim 8, wherein the cutter sleeve has an opening thread which is screw-fitted with the push-type cutter bar.

10. The blast furnace tuyere large sleeve boring device of claim 8, wherein the pusher bar comprises:

a hand wheel fixed to the other end of the threaded rod;

and the dial is fixedly connected with the threaded rod.