CN100538325C

CN100538325C - The detection drilling tool of defects in timber

Info

Publication number: CN100538325C
Application number: CNB200710072133XA
Authority: CN
Inventors: 王立海; 徐凯宏; 杨学春
Original assignee: Northeast Forestry University
Current assignee: Northeast Forestry University
Priority date: 2007-04-29
Filing date: 2007-04-29
Publication date: 2009-09-09
Anticipated expiration: 2027-04-29
Also published as: CN101042332A

Abstract

The detection drilling tool of defects in timber the present invention relates to a kind of mechanical pressure resistance type timber inherent vice Non-Destructive Testing drilling tool.It has solved existing detection drilling tool because of the friction force between the multilayer sleeve that guide effect is provided is bigger, has influenced the problem of the accuracy of the timber impedance detection signal that extracts.It comprises shell, guide pipe, the boring unit head, the feeding power head, ball-screw, drill bit and a plurality of pilot sleeve, the guide pipe liner also is fixed on the inwall of shell, ball-screw is vertically fixed in the guide pipe, the feeding power head is connected with ball-screw and is its tracks that provides to obtain ball-screw, the boring unit head is fixed on the front end of electric machine support, the rear end of drill bit is fixed on the boring unit head, the front end of drill bit passes outside the front end of shell, a plurality of pilot sleeves that diameter successively decreases successively repeatedly cover are one, and its circumferencial direction of cylindrical upper edge of pilot sleeve is evenly distributed with a plurality of outer support rolling bodys unit makes the cylindrical of per two pilot sleeves and the gap between the inwall even.

Description

The detection drilling tool of defects in timber

Technical field

The present invention relates to a kind of mechanical pressure resistance type timber inherent vice Non-Destructive Testing drilling tool.

Background technology

At present, the supply of China's timber far can not satisfy the demand of market timber.How having made full use of the forest reserves, improved timber utilization rate, is that China forestry science and technology personnel press for one of important topic of solution.It then is extremely important means that improve timber utilization rate that timber detects.Corresponding relation by research timber internal density and stress deformation mode, the principle of utilizing the generation of timber inherent vice must cause wood internal structure parameter (density, rigidity, damping and inner load) to change, by scientifically testing out these running parameters, just can provide the signal source of a quantification of inherent vice state.Carry out analyzing and processing by the different signaling point that the diverse location at timber is measured, just can estimate defect level position, size and the type of impairment of timber diverse location.Constitute the complete mechanical pressure resistance type timber inherent vice class the cannot-harm-detection device of a cover thus.

The method of timber impedance detection normally adopts a little drill point, under the energising situation, at the uniform velocity reinforcing makes little drill point penetrate timber inside, recording chart that employing is carried or computer disk write down the impedance curve that little drill point enters timber inside, wherein resistance size and the torsion that is subjected to and to enter the degree of depth directly related.Can judge the density situation at the inner concrete position of timber according to impedance curve, for judge that timber inside is rotten, damage by worms, the termite damage degree provides foundation effectively reliably.This method is mainly used in the detection of timber buildings, wooden bridge, electric pole, floor and trees etc.

The correlativity of the mechanical property of wood and density of wood is proved by the test of a large amount of seeds both at home and abroad.In the U.S., Europe, Japan and China Taiwan, historic building structure is keeped in repair preceding timber structure safety evaluation often adopt impedance diagram ripple instrument (Resisto-graph), can obtain fast detected building timber compoment, live standing tree or timber inherent vice result are determined whether to need to change tested timber compoment rapidly.Timber impedance measuring instrument has German Frank Rinn at present, SIBTEC micro Probe two famous brands that Resistograph that IML company produces and Britain Sibert Technology company produce.Wherein the bradawl pin diameter of Resistograph is 1.5～2mm, drills through the degree of depth and reaches 0.5m; And micro Probe diameter is 1.0mm, drills through the degree of depth and is 0.5m.

The problem that existing machinery pressure resistance type timber inherent vice nondestructive testing instrument exists is: give the friction force between the multilayer sleeve that the drilling tool feeding provides guide effect bigger, influenced the accuracy of the timber impedance detection signal that extracts.

Summary of the invention

The detection drilling tool that the purpose of this invention is to provide a kind of defects in timber to solve existing detection drilling tool because of the friction force between the multilayer sleeve that guide effect is provided is bigger, has influenced the problem of the accuracy of the timber impedance detection signal that extracts.The present invention includes shell 25, guide pipe 26, the boring unit head, the feeding power head, ball-screw 39, drill bit 50 and a plurality of pilot sleeve 8, shell 25 is the tubular of sealing, guide pipe 26 liners also are fixed on the inwall of shell 25, have a gathering sill 26-1 and No. two gathering sill 26-2 of vertical distribution on the tube wall of guide pipe 26, ball-screw 39 is vertically fixed in the guide pipe 26, feeding power head and boring unit head are arranged in the guide pipe 26, the feeding power head is connected with ball-screw 39 and is its tracks that provides to obtain ball-screw 39, the top and bottom of the electric machine support 1 of feeding power head embed a gathering sill 26-1 and No. two interior location with the acquisition circumferencial direction of gathering sill 26-2 respectively, the boring unit head is fixed on the front end of electric machine support 1, the rear end of drill bit 50 is fixed on the boring unit head, the front end of drill bit 50 passes outside the front end of shell 25, a plurality of pilot sleeves 8 that diameter successively decreases successively repeatedly cover are one, the rearward end of the pilot sleeve 8 of diameter minimum is fixed on the front end of electric machine support 1, the leading section of the pilot sleeve 8 of diameter maximum is fixed on the front end inside surface of shell 25, its circumferencial direction of cylindrical upper edge of pilot sleeve 8 is evenly distributed with a plurality of outer support rolling body unit 8-1 makes the cylindrical of per two pilot sleeves 8 and the gap between the inwall even, described outer support rolling body unit 8-1 is by spring 8-1-2, ball body 8-1-3 forms, annular slab 8-2 is fixed on the front end face of pilot sleeve 8, have four equally distributed blind hole 8-2-1 on the circumferential surface of annular slab 8-2, spring 8-1-2 is arranged at the bottom of the hole of blind hole 8-2-1, and ball body 8-1-3 is arranged on the top of blind hole 8-2-1 inner spring 8-1-2.

When the present invention works, the power that the boring unit head provides rotation for drill bit 50, the power that the feeding power head provides length feed for drill bit 50, the interior feed screw nut of ball-screw 39 and feeding power head cooperates.In the process that the feeding power head advances, repeatedly the pilot sleeve 8 of cover provides motion guide for the feeding power head, and the repeatedly pilot sleeve 8 of cover that is in the state of drawing back originally contracts gradually in a pilot sleeve 8.In the process of on timber, holing, gather the variation of feeding power head and boring unit head current of electric, thereby provide data for the detection of defects in timber.Owing to all be provided with outer support rolling body unit 8-1 in per two pilot sleeves 8, make the cylindrical of per two pilot sleeves 8 and the gap between the inwall even, reduced the friction force between per two pilot sleeves 8, make the current data of collection more accurate.Volume of the present invention is little, easy to carry, and is easy to use.Can be widely used in the scene detection of historic building structure parts and the detection of timber structure, wooden bridge, electric pole, floor and trees etc.

Description of drawings

Fig. 1 is the preceding half section structural representation of the present invention, Fig. 2 is the structural representation of second half section of the present invention, Fig. 1 docks the back and constitutes the complete structural representation of the present invention with Fig. 2, Fig. 3 is the vertical view of guide pipe 26 in the embodiment one, Fig. 4 is that the A of Fig. 1 is to view, Fig. 5 is the assembly structure synoptic diagram of outer support rolling body unit 8-1 and pilot sleeve 8, Fig. 6 is the structural representation of limit body 18 in the embodiment two, Fig. 7 is the syndeton synoptic diagram of annular slab 8-2 and pilot sleeve 8, and Fig. 8 is the vertical view of Fig. 6.

Embodiment

Embodiment one: specify present embodiment below in conjunction with Fig. 1 to Fig. 8.Present embodiment is by shell 25, guide pipe 26, the boring unit head, the feeding power head, ball-screw 39, drill bit 50 and a plurality of pilot sleeve 8 are formed, shell 25 is the tubular of sealing, guide pipe 26 liners also are fixed on the inwall of shell 25, have a gathering sill 26-1 and No. two gathering sill 26-2 of vertical distribution on the tube wall of the guide pipe 26 of plastic material, ball-screw 39 is vertically fixed in the guide pipe 26, feeding power head and boring unit head are arranged in the guide pipe 26, the feeding power head is connected with ball-screw 39 and is its tracks that provides to obtain ball-screw 39, the top and bottom of the electric machine support 1 of feeding power head embed a gathering sill 26-1 and No. two interior location with the acquisition circumferencial direction of gathering sill 26-2 respectively, the boring unit head is fixed on the front end of electric machine support 1, the rear end of drill bit 50 is fixed on the boring unit head, the front end of drill bit 50 passes outside the front end of shell 25, a plurality of pilot sleeves 8 that diameter successively decreases successively repeatedly cover are one, the rearward end of the pilot sleeve 8 of diameter minimum is fixed on the front end of electric machine support 1, the leading section of the pilot sleeve 8 of diameter maximum is fixed on the front end inside surface of shell 25, and its circumferencial direction of cylindrical upper edge of pilot sleeve 8 is evenly distributed with four outer support rolling body unit 8-1 so that the cylindrical of per two pilot sleeves 8 and the gap between the inwall are even.

Outer support rolling body unit 8-1 is made up of spring 8-1-2, ball body 8-1-3, annular slab 8-2 is fixed on the front end face of pilot sleeve 8, have four equally distributed blind hole 8-2-1 on the circumferential surface of annular slab 8-2, spring 8-1-2 is arranged at the bottom of the hole of blind hole 8-2-1, and ball body 8-1-3 is arranged on the top of blind hole 8-2-1 inner spring 8-1-2.Spring 8-1-2 makes the ball body 8-1-3 top inner hole wall to guiding sleeve 8, makes between the cylindrical of per two pilot sleeves 8 and the inwall to keep certain interval.

Embodiment two: specify present embodiment below in conjunction with Fig. 1 and Fig. 5, Fig. 6, Fig. 8.The difference of present embodiment and embodiment one is: it also comprises limit body 18, limit body 18 is made up of column 18-1 and arcuation baffle plate 18-2, the lower surface of arcuation baffle plate 18-2 is fixed on the edge of upper end face of column 18-1, longitudinally have elongated slot 8-3 on the outer round surface of pilot sleeve 8, limit body 18 is arranged among the blind hole 8-2-1 and between spring 8-1-2 and ball body 8-1-3, the upper end of arcuation baffle plate 18-2 is inserted among the elongated slot 8-3, and the top of ball body 8-1-3 is trapped in the elongated slot 8-3.So be provided with, limit body 18 makes the axially-movable between the pilot sleeve 8 can not setover, and the circumferencial direction between the pilot sleeve 8 is spacing by the annexation between ball body 8-1-3 and the elongated slot 8-3.Other composition is identical with embodiment one with annexation.

Embodiment three: specify present embodiment below in conjunction with Fig. 1 and Fig. 2.The difference of present embodiment and embodiment one is: the feeding power head is by electric machine support 1, a motor 41, pinion wheel 5, gear wheel 4, feed screw nut 6 and gear case 2 are formed, No. one motor 41 is arranged in the rear end of electric machine support 1, gear case 2 is fixed on the rearward end of electric machine support 1, pinion wheel 5, gear wheel 4 and feed screw nut 6 are arranged in the gear case 2, pinion wheel 5 is fixed on the motor shaft of a motor 41, gear wheel 4 is meshed with pinion wheel 5, gear wheel 4 is fixed on the feed screw nut 6 and rotation coaxial with it, and feed screw nut 6 screws on ball-screw 39.During work, No. one motor 41, pinion wheel 5, gear wheel 4, feed screw nut 6 and ball-screw 39 are formed a driving-chain, and feed screw nut 6 is along the lengthwise movement of the axially-movable pushing motor support 1 of ball-screw 39.Other composition is identical with embodiment one with annexation.

Embodiment four: specify present embodiment below in conjunction with Fig. 1.The difference of present embodiment and embodiment one is: the boring unit head is made up of No. two motor 46, drill bit chuck 35 and drill bits 50, and drill bit chuck 35 is fixed on the motor shaft of No. two motor 46, and the rear end of drill bit 50 is fixed on the drill bit chuck 35.Other composition is identical with embodiment one with annexation.

Embodiment five: specify present embodiment below in conjunction with Fig. 1.The difference of present embodiment and embodiment one is: it also comprises guide head 23, and guide head 23 is fixed on the leading section of shell 25, and drill bit 50 is through among the endoporus 23-1 of guide head 23, has a plurality of discharging opening 23-2 perpendicular to endoporus 23-1 on the guide head 23.So be provided with, owing to be provided with guide head, the stressing conditions during drill bit 50 work is greatly improved, and the wood chip that discharging opening 23-2 helps being bonded on the drill bit 50 is discharged.Other composition is identical with embodiment one with annexation.

Claims

1, the detection drilling tool of defects in timber, it comprises shell (25), guide pipe (26), the boring unit head, the feeding power head, ball-screw (39), drill bit (50) and a plurality of pilot sleeve (8), shell (25) is the tubular of sealing, guide pipe (26) liner also is fixed on the inwall of shell (25), have a gathering sill (26-1) and No. two gathering sills (26-2) of vertical distribution on the tube wall of guide pipe (26), ball-screw (39) is vertically fixed in the guide pipe (26), feeding power head and boring unit head are arranged in the guide pipe (26), the feeding power head is connected with ball-screw (39) and is its tracks that provides to obtain ball-screw (39), the top and bottom of the electric machine support of feeding power head (1) embed respectively in a gathering sill (26-1) and No. two gathering sills (26-2) to obtain the location of circumferencial direction, the boring unit head is fixed on the front end of electric machine support 1, the rear end of drill bit (50) is fixed on the boring unit head, the front end of drill bit (50) passes outside the front end of shell (25), a plurality of pilot sleeves (8) that diameter successively decreases successively repeatedly cover are one, the rearward end of the pilot sleeve of diameter minimum (8) is fixed on the front end of electric machine support (1), the leading section of the pilot sleeve of diameter maximum (8) is fixed on the front end inside surface of shell (25), its circumferencial direction of cylindrical upper edge that it is characterized in that pilot sleeve (8) is evenly distributed with a plurality of outer support rolling body unit (8-1) makes the cylindrical of per two pilot sleeves (8) and the gap between the inwall even, described outer support rolling body unit (8-1) is by spring (8-1-2), ball body (8-1-3) is formed, annular slab (8-2) is fixed on the front end face of pilot sleeve (8), have four equally distributed blind holes (8-2-1) on the circumferential surface of annular slab (8-2), spring (8-1-2) is arranged at the bottom of the hole of blind hole (8-2-1), and ball body (8-1-3) is arranged on the top of blind hole (8-2-1) inner spring (8-1-2).

2, the detection drilling tool of defects in timber according to claim 1, it is characterized in that it also comprises limit body (18), limit body (18) is made up of column (18-1) and arcuation baffle plate (18-2), the lower surface of arcuation baffle plate (18-2) is fixed on the edge of upper end face of column (18-1), longitudinally have elongated slot (8-3) on the outer round surface of pilot sleeve (8), limit body (18) be arranged in the blind hole (8-2-1) and be positioned at spring (8-1-2) and ball body (8-1-3) between, the upper end of arcuation baffle plate (18-2) is inserted in the elongated slot (8-3), and the top of ball body (8-1-3) is trapped in the elongated slot (8-3).

3, the detection drilling tool of defects in timber according to claim 1, it is characterized in that the feeding power head is by electric machine support (1), a motor (41), pinion wheel (5), gear wheel (4), feed screw nut (6) and gear case (2) are formed, a motor (41) is arranged in the rear end of electric machine support (1), gear case (2) is fixed on the rearward end of electric machine support (1), pinion wheel (5), gear wheel (4) and feed screw nut (6) are arranged in the gear case (2), pinion wheel (5) is fixed on the motor shaft of a motor (41), gear wheel (4) is meshed with pinion wheel (5), gear wheel (4) is fixed on feed screw nut (6) and goes up and rotation coaxial with it, and feed screw nut (6) screws on ball-screw (39).

4, the detection drilling tool of defects in timber according to claim 1, it is characterized in that it also comprises guide head (23), guide head (23) is fixed on the leading section of shell (25), drill bit (50) is through in the endoporus (23-1) of guide head (23), and guide head (23) is gone up and had a plurality of discharging openings (23-2) perpendicular to endoporus (23-1).