The connection rods

 

The invention relates to mining, namely, drilling rods, used for drilling bore-holes and wells. In connection rods, in which the drill rods do with the possibility of twisting one another, each of the rods has three boarding plot: a threaded, tapered Sanatornaya and cone nasmotrevshayasya, with the sequence of their location along the axis of the drill rod from the screw to the cone nasmotrevshayasya through cone somatropina. The dimensions of the parcel pick up so that the contact parts in cone nesamotsenna section occurs after the flexible circuit cone senatorsanders area. The invention provides for the elimination of conditions leading to congestion in some areas of the connection. 1 Il.

The invention relates to mining, and more particularly to drilling rods, used for drilling bore-holes and wells.

Known threaded connection rods ([1] page 243, Fig.VIII.8.a, b, C). The disadvantage of these compounds is the possibility of excessive tightening of the threads, causing them to cut, especially as the load on the coils of threads cannot be distributed evenly, and it overloads the individual widgenie connection rods ([1] page 258, Fig.VIII.16.a) they are made with angles of taper(2°30'...3°30') ([1] p. 266, seventh line from the bottom). The disadvantages of such compounds is the following possible breakage of the parts when pressing and the need for very large effort to repressive, which often technically impossible to implement in mines (see [1] page 257, first paragraph).

Closest to the claimed relates taper-threaded connection ([1] page 245, Fig. VIII.9.b) adopted for the prototype. In this case, the torque is transmitted from one rod to another, due to the fact that each bar contains two sections of the connection - threaded and tapered. When this tapered section is taken nasmotrevshihsya and its presence, firstly, prevents excessive tightening of the threaded section, a second, partially allows to transmit torque through the tapered connection and, thirdly, the centers of the rods relative to each other.

However, this compound also has a significant disadvantage in that nasmotrevshayasya the tapered section may not transmit significant torque and therefore the threaded section is overloaded, and if provided with a tapered section amatormassiga, inevitably, jamming it art is the elimination of the disadvantages of the prototype, i.e., the elimination of conditions leading to congestion in some areas of the connection.

The basis for solving the technical problem based on the idea used in conjunction with a threaded section of two types of cone connection - senatorsanders and nicotinamidase. Under amatormassiga cone zanimaetsya a cone with a cone angle <4°, and under nasmotrevshihsya - angle taper >12° ([1] page 266, line 11, and further below). It is important for this site to arrange along the axis of the connection sequence - threaded, tapered Sanatornaya and cone nasmotrevshayasya.

The solution is achieved by the connecting rods, made with threaded and tapered sections, drill rods do with the possibility of twisting one another. Each of the rods has three boarding plot: a threaded, tapered Sanatornaya and cone nasmotrevshayasya, with the sequence of their location along the axis of the drill rod from the screw to the cone nasmotrevshayasya through cone Sanatornaya, and size of areas to pick so that the contact parts in cone nesamotsenna section occurs after the flexible circuit cone senatorsanders of uchastka rod; OO - geometric axis of the connection, coinciding with the axis of the rod; 1’- nasmotrevshayasya tapered section; 1" - Sanatornaya tapered section; 1"' - threaded plot;- the angle of the taper section 1',>12;- the angle of the taper section 1",<4.

Works connection as follows.

The rod 1 is entered in the forestay 2, twist on the screw section 1’" to contact the tapered senatorsanders plot 1".

Upon further screwing in of the elastic deformation occurs in the contact zone senatorsanders plot and axial displacement of the parts (see [1] page 263, 5-th line of the above formula (VIII.27) and Fig.VIII.27), which provides the appearance of contact on nesamotsenna site 1'. Thus, there is initially contact the threaded section, then tapered effect plot and after the elastic deformation of the conical section nicotinamidase. That is, the sizes of the plots are selected in advance so that the contact parts in cone nesamotsenna site 1' occurs only after the flexible circuit in the cone senatorsanders site.

When proishodit distribution points for all sites what prevents them from overload.

The disconnect is quite easy due to the fact that section 1"' provides rods relative rotational-translational motion, leading to ejection and separation of the rods.

The source of information

1. Alimov O. D., Janitorial L. T. Drill machine. M: mechanical engineering, 1976, S. 295.

Claims

The connection of drill rods, in which the drill rods are made with threaded and tapered sections, characterized in that the drill rods do with the possibility of twisting one another, each of the rods has three boarding plot: a threaded, tapered Sanatornaya and cone nasmotrevshayasya, with the sequence of their location along the axis of the drill rod from the screw to the cone not Sanatornaya through cone Sanatornaya, and size of areas to pick so that the contact parts in cone nesamotsenna section occurs after the flexible circuit cone senatorsanders area.

 

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