CN202116568U

CN202116568U - Plug-in type sealed drill bushing

Info

Publication number: CN202116568U
Application number: CN201120189447XU
Authority: CN
Inventors: 戴楚玉; 戴光荣; 戴光华
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-03
Filing date: 2011-06-03
Publication date: 2012-01-18
Anticipated expiration: 2021-06-03

Abstract

The utility model discloses a plug-in type sealed drill bushing. The head of the plug-in type sealed drill bushing is a concave hollow screw (1) which is mounted in the center of a drill bushing body (2), a piston (6) which is close to the hollow screw (1) is mounted in a central inner cavity of the drill bushing body (2), a sealing ring (5) is mounted in an outer wall groove of a cylindrical section of the piston (6), the head of the piston (6) is hemispherical, semicircular or conical, and a head inner cavity of a drill stem (3) is hemispherical, semicircular or conical. After penetrating through the central inner cavity of the drill bushing body (2), the head of the drill stem (3) closely contacts with the head of the piston (6), an inner groove is disposed on the inner wall at one end of the drill bushing body (2), an outer groove is arranged on the outer wall of one end of the drill stem (3), a wedge (4) penetrates through the outer wall of the drill bushing body (2) prior to being plugged into a slotted hole consisting of the inner groove and the outer groove, and a split pin (7) is mounted at one end of the wedge (4). The plug-in type sealed drill bushing is compact in structure, fine in sealing effect, convenient in assembly and disassembly and long in service life, is time-saving and labor-saving, is an ideal matching tool for opening tap holes of large-sized metallurgical blast furnaces, and has popularization value.

Description

A kind of plug-in type sealing drill bushing

Technical field

The utility model relates to a kind of drill bushing; Relate in particular to a kind of large-scale metallurgical blast furnace that is applied to for opening the matching used plug-in type sealing of blast furnace iron notch and rig drill bushing, it also can be used as the auxiliary equipment that matches and use with rig in metal mine or the non-metal mine exploitation.

Background technology

In the ironmaking program of iron and steel enterprise, when the molten iron in the metallurgy high furnace reaches composition and requires, must open iron notch molten iron is emitted, send the steel-making program or directly be cast as piece with iron ladle.Usually use the tapping outlet rig for opening the metallurgy high furnace tapping outlet, the parts that borer drill rod is connected with shank of drilling machine are called drill bushing, and they all are operated in extremely under the harsh conditions.

Before the utility model; Its structural shape of employed drill bushing differs from one another; If any air-tightness good but loading and unloading and the bullhead screw thread drill bushing of changing difficulty, also have and change easily but poor air-tightness, leak serious or air pressure does not reach the trapezoidal drill bushing of requirement." shortcut drill bush ", ZL200920063883.5 " T type wedge-type shortcut drill bush " etc. that ZL2008201591345 is arranged in the recent period; They differ from one another; Be applicable to that medium and small blast furnace is to open the parts that iron notch and rig match and use, also can be used for large blast furnace (as greater than 3000m ³Blast furnace) open iron notch with the supporting use of rig, but because of complex structure, consumable accessory (like spring) is many, changes comparatively trouble.Remove this, the drill bushing that also useful two joints are threaded, dismounting is extremely inconvenient, and the drilling rod spoilage is high, and is inapplicable.

Find content

The purpose of the utility model is to provide a kind of good seal performance, dismounting is quick, tunneling effect is good and the plug-in type of long service life sealing drill bushing.

For realizing above-mentioned purpose, the technical scheme that the utility model adopts is: described a kind of plug-in type sealing drill bushing comprises cored screw, drill bushing body, drilling rod, voussoir, sealing-ring, piston and split pin.Central position at the drill bushing body is equipped with cored screw; There is piston to be assemblied in the central lumen of drill bushing body near cored screw; In the cylindrical segment outer wall groove of piston sealing-ring is housed, forms between the head that passes the drilling rod after the drill bushing body central lumen and the head of piston and closely contact.Inwall at drill bushing body one end has inside groove, has water jacket at the outer wall of drilling rod one end, and the voussoir that passes behind the external wall of drill bushing is inserted in the slotted eye that is made up of inside groove and water jacket, is furnished with split pin for one of voussoir.

Adopt a kind of plug-in type sealing drill bushing that as above technical scheme provides compared with prior art, technique effect is:

1. owing in the concave groove of the top of cored screw with in the top Baltimore groove of piston, do not have spring, saved consumable accessory, neither influenced stopping property, practiced thrift product cost again, for the dismounting drill bushing has brought convenience;

2. in the formed slotted eye of water jacket of the inside groove of drill bushing body and drilling rod, be fitted with the voussoir of band split pin, but both carry-over moment of voussoir can make again drilling rod and the dismounting of drill bushing body extremely convenient, saves maintenance and replacing time;

3. under the pressurized air effect that comes from the rig direction, the head of piston is closely contacted with the head of drilling rod, can not leak pressurized air, good seal performance;

4. both be applicable to middle-size and small-size metallurgy high furnace, also be applicable to the large-scale metallurgical blast furnace, a kind of utility was provided for opening blast furnace iron notch.

Description of drawings

Fig. 1 is the forward structure cross-sectional schematic of the described a kind of plug-in type sealing drill bushing of the utility model, also is the Figure of abstract of the utility model.

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

Embodiment

Below in conjunction with accompanying drawing the embodiment of the utility model is done further to describe in detail.

Described a kind of plug-in type sealing drill bushing comprises cored screw 1, drill bushing body 2, drilling rod 3, voussoir 4, sealing-ring 5, piston 6 and split pin 7.As shown in Figure 1, the left end center screw of drill bushing body 2 is threaded with rig, gets close to this center screw and is equipped with cored screw 1 in the central position of drill bushing body 2, and said assembling can be selected to be threaded.There is piston 6 to be assemblied in the center inner wall of drill bushing body 2 near cored screw 1; In the outer wall groove of the cylindrical segment of piston 6 sealing-ring 5 is housed; The inwall of sealing-ring 5 and drill bushing body 2 forms primary seal for closely to contact, and makes drill bushing body 2 inner chambers between cored screw 1 and piston 6 that pressure space arranged.Wherein the head configuration of piston 6 is semisphere, semicircle or taper, and with the head cavity of the contacted drilling rod 3 of the head of piston 6 be semisphere, semicircle or taper.Form between the head that passes the drilling rod 3 after drill bushing body 2 central lumen and the head of piston 6 and closely contact; Promptly form secondary seal, the drill bit that the inner chamber that pressurized air can be directly gets into inner chamber and the drilling rod 3 of drill bushing body 2 left end inner chambers, piston 6 from compressor arrives drilling rod 3 heads cools off drill bit.Internal chamber wall at drill bushing body 2 one ends has inside groove; Outer wall at drilling rod 3 one ends has water jacket; The slotted eye that is made up of inside groove and water jacket can be square slotted eye, and the voussoir 4 that passes behind drill bushing body 2 outer walls is inserted into (as shown in Figure 2) in the slotted eye that is made up of water jacket and inside groove, is furnished with split pin 7 for one of voussoir 4; Split pin 7 can make voussoir 4 location, can not fall down from drill bushing body 2.

During enforcement; The right-hand member of drilling rod 3 is connected with drill bit; Simultaneously be assembled to sealing-ring 5 in the outer wall groove of cylindrical segment of piston 6 and sealing-ring 5 is closely contacted with the inwall of drill bushing body 2; Cored screw 1 is connected to the left end inner chamber of drill bushing body 2, makes between cored screw 1 and the piston 6 and form pressure space.Be inserted to the drilling rod that drill bit is housed 3 centre hole of drill bushing body 2 and let the head of drilling rod 3 closely contact from the right-hand member of drill bushing body 2 and form the plug-in type sealing with the head of piston 6; Insert voussoir 4 in the slotted eye that constitutes by inside groove, water jacket; Mix split pin 7, form plug-in type sealing drill bushing.

Start rig and drive 2 rotations of drill bushing body, drive drilling rods 3 rotations through voussoir 4 and drill bushing body 2, the rotation of drilling rod 3 drives the drill bit that is attached thereto and rotates, and the rotation of drill bit can be opened blast furnace iron notch.During drill bit that need to change drilling rod 3 and be attached thereto, only need to take out split pin 7 earlier, unload lower wedge block 4 and get final product, can reach the described purpose of the utility model.

Application the utility model patent applied for patent of invention on the same day, accompanying drawing is identical.

Claims

1. a plug-in type seals drill bushing; It comprises cored screw (1), drill bushing body (2), drilling rod (3), voussoir (4), sealing-ring (5), piston (6) and split pin (7); It is characterized in that: be equipped with cored screw (1) in the central position of drill bushing body (2); There is piston (6) to be assemblied in the central lumen of drill bushing body (2) near cored screw (1); In the outer wall groove of piston (6) cylindrical segment sealing-ring (5) is housed, forms between the head that passes the drilling rod (3) after drill bushing body (2) central lumen and the head of piston (6) and closely contact; Inwall at drill bushing body (2) one ends has inside groove, has water jacket at the outer wall of drilling rod (3) one ends, and the voussoir (4) that passes behind drill bushing body (2) outer wall is inserted in the slotted eye that is made up of inside groove and water jacket, is furnished with split pin (7) for one of voussoir (4).

2. a kind of plug-in type sealing drill bushing according to claim 1, it is characterized in that: the head configuration of piston (6) is semisphere, semicircle or taper, the head cavity of drilling rod (3) is semisphere, semicircle or taper.

3. a kind of plug-in type sealing drill bushing according to claim 1, it is characterized in that: sealing-ring (5) is with forming closely contact between the inwall of drill bushing body (2).