CN203321358U

CN203321358U - Spring positioning pin for connection of plug-in drill pipe

Info

Publication number: CN203321358U
Application number: CN201320309926XU
Authority: CN
Inventors: 王海峰
Original assignee: Individual
Current assignee: Shandong Yikuang Drilling And Producing Technology Co ltd
Priority date: 2013-05-31
Filing date: 2013-05-31
Publication date: 2013-12-04
Anticipated expiration: 2023-05-31

Abstract

Disclosed is a spring positioning pin for the connection of a plug-in drill pipe. A positioning pin (2) presses down a return spring (1) and is fitted in a positioning pinhole (M) radially formed in a shank of a plug head (T) of a drill pipe (3). The section of a body (X) of the positioning pin (2) is in the shape of an axial rectangle with arced ends. The outer edge of the bottom of the body (X) is provided with a projecting base (C) in the same shape of the axial rectangle. A radial lockpin hole (K) is formed in the shank in a socket hole (D) in the rear end of the drill pipe (3). The lockpin hole (K) matches with the section of the body (X) of the positioning pin (2) in the shape and size and is fitted to the plug head (T) of the rear drill pipe (3). The lockpin hole (K) holds the positioning pin (X) on the plug head (T) so as to lock and connect the front and rear drill pipes (3) in a positioning manner. The spring positioning pin is convenient and fast to plug and firm after being connected and locked; time and labor are saved; loss of the drill pipes (3), caused by poor connection tightness, is reduced; production cost can be reduced; drilling efficiency can be improved; construction progress is quickened.

Description

A kind of plug-in type drilling rod connects uses spring holder

Technical field

The utility model relates to the coal mine drilling metal drill pipe, relates in particular to the drilling rod alignment pin of socket connection.

Background technology

When drilling coal mine roadway or supporting boring, need connect drill bit with drilling rod and be constructed, because the length of boring is very long, drilling rod is that more piece connects use, the normal alignment pin connected mode that adopts between two joint drilling rods.It is several that the form of current alignment pin mainly contains helical spring alignment pin, Bolt to position pin, U-shaped alignment pin etc.The helical spring alignment pin is multiplex in auger stem, common colliery drilling rod.Owing to restricted by drill pipe diameter, the diameter of straight pin is little, and the pulling force born is corresponding restricted, when being subject to larger pulling force, the shank fracture often occurring, and drilling rod can't normally be fetched, and causes drilling rod, drill bit to damage, lose, and causes economic loss and waste; The Bolt to position pin is multiplex in the geological drilling drilling rod, although intensity is enough high, because the drilling rod protrusion is exposed outside in bolt two, has strengthened the resistance that creeps into of drilling rod, when replacing, jointed rod, will carry out dismounting with special-purpose wrench, requires great effort time-consuming, and efficiency of construction is lower; U-shaped alignment pin often coordinates with the cylindrical spring pin, during use, by the elasticity of shank own, is fixed, firm not, often occurs that in the rod boring process alignment pin comes off, and causes drilling rod not fetch, and the drilling rod Loss therefore occurred is very general.

The utility model content

The purpose of this utility model, just be to provide a kind of alignment pin for the quick connection of plug-in type drilling rod, rational in infrastructure, connects reliably, pegs graft convenient, guarantees that drilling rod is connected firmly, and the loss of minimizing drilling rod, use manpower and material resources sparingly, raising drilling quality and efficiency.

Task of the present utility model completes like this: design and produce a kind of plug-in type drilling rod connection spring holder, alignment pin presses down back-moving spring, be installed on the connection-peg body of rod of drilling rod in dowel hole radially, the shank cross section of alignment pin is the axial rectangle that two ends are circular arc, the bottom outer rim of shank is protruded the base of same shape, have lockpin hole radially on the body of rod of drilling rod rear end spliced eye, shape, size is complementary with the shank cross section of alignment pin, equipped with the connection-peg of back drilling rod, lockpin hole blocks the alignment pin on connection-peg, by two of front and back sealed being located by connecting of drilling rod.The shank end face of alignment pin is inclined-plane, and bevel edge is with chamfering.The shank cross sectional shape of alignment pin can be the rectangle of four jiaos of band fillets, and the base of same shape is protruded in bottom around shank.Base and the back-moving spring of the shape of the radial location pin-and-hole on the connection-peg body of rod, size and alignment pin are complementary, and can be blind holes, with sealing of hole ring cushion cover, are contained on shank, seal the blind hole opening, can be also through holes, seal the end mouth of through hole with plug.This locating pin structure form can strengthen the sectional area of shank on the limited body of rod of tool joint as far as possible, and the pulling force that alignment pin is born strengthens, and with the body of rod bearing tension of drilling rod, realizes reasonably coupling, eliminates the weak link that plug-in type drilling rod connects.Alignment pin is installed in the through hole or blind hole of the radial location pin-and-hole on the connection-peg of plug-in type drilling rod, installs back-moving spring below the boss base of alignment pin bottom, the back-moving spring bottom is supported by the back cover of plug or blind hole.When drilling rod is pegged graft, drilling rod rear end spliced eye inwall is depressed alignment pin, and after grafting puts in place, by back-moving spring, by alignment pin jack-up, the shank epimere stretches in the radially lockpin hole on the spliced eye body of rod of drilling rod rear end and blocks, the sealed connection in location of drilling rod before and after completing.

Manufactured experimently, tested according to technique scheme, proof the utility model is rational in infrastructure, peg graft efficient and convenient, connect sealed firm, time saving and energy saving, greatly reduced because connecting the insecure drilling rod loss caused, reduce cost of production, guaranteed drilling quality, improved drilling efficiency, accelerate construction speed, reached preferably predeterminated target.

The accompanying drawing explanation

Fig. 1 is the structural representation that the utility model is installed on the connection-peg T of drilling rod 3;

Fig. 2 is that the A of Fig. 1 is to top view;

Fig. 3 is the local enlarged diagram that the alignment pin 2 of Fig. 1 is installed in dowel hole M;

Fig. 4 is the front view of alignment pin 2;

Fig. 5 is that the B of Fig. 4 is to top view.

In figure, 1-back-moving spring, 2-alignment pin, 3-drilling rod, 4-sealing of hole ring pad, 5-sealing ring; A-line of vision symbol, B-line of vision symbol, C-base, D-spliced eye, K-lockpin hole, M-dowel hole, P-inclined-plane, T-connection-peg, X-shank.

The specific embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is illustrated.

Consult Fig. 1, Fig. 2, plug-in type drilling rod 3 front ends are connection-peg T, rear end is spliced eye D, connection-peg T middle part has dowel hole M radially, dowel hole M is rectangle two ends band circular arcs, installing back-moving spring 1 in hole, back-moving spring 1 top installing alignment pin 2, shank X exposes on top the connection-peg T body of rod, the aperture of rear end spliced eye D and front end connection-peg T external diameter are complementary, offer radially lockpin hole K on the body of rod of spliced eye D, the shape of lockpin hole K is identical with the cross sectional shape of alignment pin 2, and its size is complementary.In the dowel hole M of connection-peg T, the boss base C of alignment pin 2 bottoms is pressed in back-moving spring 1 top, and the upper suit of the shank X of alignment pin 2 sealing of hole ring pad 4, by the aperture close encapsulation of dowel hole M.The body of rod cross sectional shape of drilling rod 3 can be circular, square, can be also triangle, hexagon.

Consult Fig. 3, Fig. 4, Fig. 5, alignment pin 2 is rectangle cross section cylinders that two ends are semicircle, and bottom is with the base C of identical shaped evagination, and shank X end face is inclined-plane P, and edge is with chamfering.The following pressure of base C is put back-moving spring 1, top suit sealing ring 5 and sealing of hole ring pad 4, and the endoporus of sealing of hole ring pad 4 is identical with shape, the size of the shank X of alignment pin 2, and outer rim is identical with shape, the size of dowel hole M.Endoporus coordinates with alignment pin 2 movable sets, and the orifice sealing of the dowel hole M of outer rim and connection-peg T is equipped, seals aperture.

The utility model and plug-in type drilling rod are supporting, are installed in the dowel hole M of drilling rod 3 front end connection-peg T, and equipped with another root drilling rod 3 rear end spliced eye D, connection-peg T injects spliced eye D, and alignment pin 2 is depressed, and compresses back-moving spring 1.After grafting puts in place, alignment pin 2 overlaps with the lockpin hole K of drilling rod 3 rear ends, and back-moving spring 1 is upspring, and the epimere of alignment pin 2 is headed into to lockpin hole K, and two drilling rods 3 of sealed connection can connect some drilling rods 3 continuously with the same manner.When cash 3 is bored in dismounting, only alignment pin 2 need be pressed into to lockpin hole K, two drilling rods 3 can be separated and take apart, realize connecting fast and easily and dismantling, dismounting is very convenient, flexible, connects closely.The axial strength of alignment pin 2 is high, and bearing tension is large, while effectively having avoided boring, because the connecting pin fracture causes drilling rod 3 to throw off, can get out, drilling rod 3 material unaccounted-for (MUF)s have been reduced, reduce drilling cost, improved drilling efficiency, there is good economic and social benefits and application value.

Claims

1. a plug-in type drilling rod connects and uses spring holder, alignment pin (2) presses down back-moving spring (1), be installed on connection-peg (T) body of rod of drilling rod (3) in dowel hole (M) radially, shank (X) cross section that it is characterized in that alignment pin (2) is the axial rectangle that two ends are circular arc, the bottom outer rim of shank (X) is protruded the base (C) of same shape, have lockpin hole (K) radially on the body of rod of drilling rod (3) rear end spliced eye (D), shape, size is complementary with shank (X) cross section of alignment pin (2), equipped with the connection-peg (T) of back drilling rod (3), lockpin hole (K) blocks the alignment pin (2) on connection-peg (T), by sealed being located by connecting of two drilling rods in front and back (3).

2. connect and use spring holder according to plug-in type drilling rod claimed in claim 1, it is characterized in that shank (X) end face of described alignment pin (2) is inclined-plane (P), edge, inclined-plane (P) is with chamfering.

3. connect and use spring holder according to plug-in type drilling rod claimed in claim 1, the base (C) and the back-moving spring (1) that it is characterized in that shape, size and the alignment pin (2) of the radial location pin-and-hole (M) on described connection-peg (T) body of rod are complementary, it can be blind hole, with sealing of hole ring pad (4), be sleeved on shank (X), seal the blind hole opening, can be also through hole, seal the end mouth of through hole with plug.