CN201280565Y

CN201280565Y - Fast drill bush

Info

Publication number: CN201280565Y
Application number: CNU2008201591348U
Authority: CN
Inventors: 戴光荣; 戴光华
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-06
Filing date: 2008-11-06
Publication date: 2009-07-29
Anticipated expiration: 2018-11-06

Abstract

The utility model discloses a quick drill bushing. A first sealing ring and a second sealing ring are placed on an outer circumferential annular groove of a drill bushing body; a toothed sleeve compression ring is installed on a middle section of a hollow drill stem; nut toothed sleeve threads are formed on a thread section of the hollow drill stem and engaged with the toothed sleeve compression ring; the hollow drill stem is sleeved in an assembly slot of a locking nut through a wing plate on the toothed sleeve compression ring and then sleeved in a center hole of the drill bushing body; a flat section or a polygonal section of the hollow drill stem is matched with a flat hole or a polygonal hole of the drill bushing body; and a conical section or a round section of the hollow drill stem and the inner cavity wall of the drill bushing body are in conical surface contact or spherical surface contact. The quick drill bushing adopting the structure has the advantages of compact structure, good sealing performance, and convenient and quick assembly and disassembly. In addition, the quick drill bushing is not only used in a blast furnace iron notch driller, but also used as a part of a driller used in metal mines or nonmetal mines.

Description

Shortcut drill bush

Technical field

The utility model relates to a kind of drill bushing, relates in particular to a kind of metallurgy high furnace that is applied to for opening the matching used shortcut drill bush of blast furnace taphole and rig, and this shortcut drill bush also can be used as the auxiliary equipment that matches with rig in metal mine or the non-metal mine exploitation.

Background technology

Blast furnace is required to be steel making working procedure the fine molten iron is provided in ferrous metallurgy associated enterprises, when the molten iron in the blast furnace to opening blast furnace iron notch to a certain degree the time and molten iron is delivered to iron ladle through the molten iron channel being blended into hot metal mixer again or directly sending steel melting furnace.Usually use the tapping outlet rig for opening blast furnace iron notch, the parts that rig and drilling rod socket-connect are called drill bushing, and they are extremely carrying out work under the harsh conditions.

Employed drill bushing structure is not too reasonable before the utility model, the centre hole of the drill bushing that links to each other with rig does not have sealing equipment after placing drilling rod, only having a lock-joint is sleeved on drilling rod in the drill bushing through bearing pin, extraneous dust easily enters in the centre hole of drill bushing, influence sealing effectiveness, wearing and tearing are big, and life-time service causes loosening, inefficiency, the tapping outlet weak effect.In addition, link closely with screw between drilling rod and the drill bushing, Assembly And Disassembly is extremely inconvenient, influences the rig operating rate.

Summary of the invention

In order to overcome the problem that prior art exists, the utility model provides a kind of compact construction, good sealing effect, mounting or dismounting are convenient and the shortcut drill bush of long service life.

For achieving the above object, the technical solution adopted in the utility model is: described a kind of shortcut drill bush comprises drill bushing body, hollow drill pipe, first sealing-ring and second seal, set nut, nut teeth cover, tooth cover pressure ring etc.In the peripheral annular groove of drill bushing body, be placed with first sealing-ring and second sealing-ring, its neighboring is fixed with the set nut thread set of handle on the thread segment of the external edge of drill bushing, the tooth cover pressure ring that has wing plate is contained on the interlude of hollow drill pipe, the nut teeth cover is assemblied on the thread segment of hollow drill pipe and with tooth cover pressure ring and is meshed, hollow drill pipe is sleeved on the centre hole of drill bushing body after the wing plate on the tooth cover pressure ring is inserted in assembling notch on the set nut, the conical section of hollow drill pipe or spherical segment form with the internal chamber wall of drill bushing body that conical surface contacts or spherical contacts.

Adopt a kind of shortcut drill bush that as above technical scheme advances confession compared with prior art, technique effect is:

1. compact construction is stable.Each parts assembling is rationally transmitted big longitudinal force at shortcut drill bush energy in service, can realize the assembling or the dismounting of drill bushing and hollow drill pipe quickly.

2. two layers of sealing-ring are arranged between drill bushing body and lock nut, and extraneous dust also can not enter the inner chamber of shortcut drill bush under bad working environment, can be between the parts because of extraneous dust does not cause damage, and long service life;

3. the conical section of hollow drill pipe or circle segments contact with tapered of the internal chamber wall of drill bushing body or the circular face contact, good sealing effect.

4. suitability is wide, not only can match with the rig of blast furnace open hole, also can be used as the matching component of metal mine or non-metal mine exploitation with rig.

Description of drawings

Fig. 1 is the structure cross-sectional schematic of a kind of shortcut drill bush described in the utility model, also is Figure of abstract of the present utility model;

Fig. 2 is the left-hand synoptic diagram of Fig. 1;

Fig. 3 is a tapered sleeve body cross-sectional schematic;

Fig. 4 is the dextrad synoptic diagram of Fig. 3;

Fig. 5 is the cross-sectional schematic of hollow drill pipe;

Fig. 6 is the left-hand synoptic diagram of Fig. 5;

Fig. 7 is the profile synoptic diagram of nut teeth cover;

Fig. 8 is the cross-sectional schematic of tooth cover pressure ring;

Fig. 9 is the cross-sectional schematic of set nut;

Figure 10 is the dextrad synoptic diagram of Fig. 9.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Described a kind of shortcut drill bush comprises drill bushing body 1, hollow drill pipe 2, first sealing-ring 3 and second sealing-ring 7, set nut 4, nut teeth cover 5 and tooth cover pressure ring 6.Be placed with first sealing-ring 3 and second sealing-ring 7 in the peripheral annular groove of drill bushing body 1, because of work under bad environment, first sealing-ring 3 and second sealing-ring 7 can select for use metallic substance to make when opening blast furnace taphole.The neighboring is fixed with set nut 4 thread sets of handle 4A on the thread segment of drill bushing body 1 outer rim, and first sealing-ring 3 and second sealing-ring 7 closely are pressed in the peripheral annular groove of drill bushing body 1, the degree of rotation of handle 4A can determine the locking degree of set nut 4 on drill bushing body 1.The tooth cover pressure ring 6 that has wing plate 6A is contained on the interlude of hollow drill pipe 2, and nut teeth is overlapped on the thread segment that 5 screw threads are assemblied in hollow drill pipe 2 and with tooth cover pressure ring 6 and is meshed the thread segment optimal selection corrugated thread section of described hollow drill pipe 2.The wing plate 6A of hollow drill pipe 2 on tooth cover pressure ring 6 is sleeved in the centre hole of drill bushing body 1 after being inserted in assembling notch 4B on the set nut 4, and the conical section of hollow drill pipe 2 or circle segments a form with the internal chamber wall of drill bushing body 1 that conical surface contacts or circular face contacts.

When the hollow drill pipe 2 that the tooth cover pressure ring 6 of engagement and nut teeth cover 5 is housed each other when periphery is encased in the inner chamber of drill bushing body 1, the wing plate 6A that is connected on the tooth cover pressure ring 6 is allowed by hollow drill pipe 2 facing to the assembling notch 4B on the set nut 4, the integral body that nut teeth cover 5 and tooth cover pressure ring 6 threes form enters in passing by drill bushing body 1, the inner chamber that set nut 4 constitutes, and stir tooth cover pressure ring 6 and allow stagger assembling notch 4B on the set nut 4 of wing plate 6A, operation handle arm 4A makes set nut 4 tightly be screwed in the outer wall of drill bushing body 1 simultaneously, set nut 4 tightly suppresses wing plate 6A on the tooth cover pressure ring 6 and makes tooth cover pressure ring 6 promote hollow drill pipes 2 with nut teeth cover 5 to move left like this, allows a section of hollow drill pipe 2 and a of drill bushing body 1 ₁Section matches the b section of hollow drill pipe 2 and the b of drill bushing body 1 ₁Section matches.

Circle or sexangle hollow drill pipe that described hollow drill pipe 2 can select for use the 55SiMnMo material to make.The a section of hollow drill pipe 2 is that sphere or taper, b section are that flat or N limit shape, c section are thread segment; The a of drill bushing body 1 inner chamber ₁Section is taper or sphere, b ₁Section is the flat hole or is shape hole, N ' limit (as the 1A hole of Fig. 4).The a section of hollow drill pipe 2 and a of drill bushing body 1 ₁Section matches the b section of hollow drill pipe 2 and the b of drill bushing body 1 ₁Section matches.The taper optimal selection taper shape of a section of hollow drill pipe 2 wherein, described N, N ' are the integer more than or equal to 3.

During work, the center screw of drill bushing body 1 rounded nose is linked to each other with rig, and the left end head of hollow drill pipe 2 connects tapping outlet drill bit (or tapping outlet bore bit).Start rig, the drill bushing body 1 of shortcut drill bush rotates and drives hollow drill pipe 2 rotations.Because a of drill bushing body 1 inner chamber ₁Section and b ₁Section forms tight the contact with a section, the b section of hollow drill pipe 2, drives hollow drill pipe 2 rotations so drill bushing body 1 can be passed to longitudinal force hollow drill pipe 2.When the tapping outlet drill bit of hollow drilling rod 2 heads or tapping outlet bore bit damage when needing to change hollow drill pipe 2, unclamp lock nut 4 through operation handle arm 4A, pull down tooth cover pressure ring 6 and nut teeth cover 5 successively after taking out hollow drill pipe 2, change new hollow drill pipe 2 and can put into operation again, reach purpose described in the utility model.

Claims

1, a kind of shortcut drill bush, it is characterized in that: first sealing-ring (3) and second sealing-ring (7) are arranged in the peripheral annular groove of drill bushing body (1), the neighboring is fixed with set nut (4) thread set of handle (4A) on the thread segment of drill bushing body (1) outer rim, the tooth cover pressure ring (6) that has wing plate (6A) is contained on the interlude of hollow drill pipe (2), nut teeth cover (5) screw thread is assemblied on the thread segment of hollow drill pipe (2) and with tooth cover pressure ring (6) and is meshed, the wing plate (6A) of hollow drill pipe (2) on tooth cover pressure ring (6) is sleeved in the centre hole of drill bushing body (1) after being inserted in assembling notch (4B) on the set nut (4), and the conical section of hollow drill pipe (2) or spherical segment (a) form with the internal chamber wall of drill bushing body (1) that conical surface contacts or spherical contacts.

2, a kind of shortcut drill bush according to claim 1 is characterized in that: (a) of hollow drill pipe (2) section is thread segment, (a) section of hollow drill pipe (2) the and (a of drill bushing body (1) for taper or sphere, (b) section for flat or N limit shape, (c) section ₁) section matches the (b of (b) of hollow drill pipe (2) section and drill bushing body (1) ₁) section match; (b ₁) section be flat hole or shape hole, N ' limit (1A); Wherein N is the integer more than or equal to 3, and N ' also is the integer more than or equal to 3.