CN2038248U

CN2038248U - Small-size geophone

Info

Publication number: CN2038248U
Application number: CN 88205428
Authority: CN
Inventors: 周流; 廖正蓉; 周剑川
Original assignee: CHONGQING GEOLOGICAL INSTRUMENT FACTORY
Current assignee: CHONGQING GEOLOGICAL INSTRUMENT FACTORY
Priority date: 1988-05-14
Filing date: 1988-05-14
Publication date: 1989-05-24

Abstract

The utility model discloses a small-size detector, comprising a lengthened and thickened core body outer barrel having magnet conducting, and positioning and protecting actions. The inner part of the core body outer barrel is sealed by adopting a plurality of sealing rings through dividing sections, the upper end of the core body outer barrel is sealed by a rubber cap and a pressing cover and then is fixed by a card, a tail cone is directly arranged on the cone connecting nut of the bottom of the outer barrel, and the surface of the outer barrel adopts sprayed plastics or coating to replace the special-purpose plastic outer protecting sleeve of the general geophone. The small-size detector has smaller volume than the general geophone, having the advantages of light weight, low intensity of the field work, easy dismounting and maintenance and good sealing and water proofing performances.

Description

Small-size geophone

The utility model relates to a kind of new construction of small-sized seismic prospecting detector.

Seismoreceiver is used for seismic prospecting, the vibrations that the seismic event that measurement is produced by focus causes on ground after the bed boundary reflection.In the seismic prospecting in modern times, the geophone station on every survey line often reaches hundreds of, even thousands of, all there are some wave detectors to carry out connection in series-parallel on each geophone station.Present wave detector is all bigger, and is heavier, so the general assembly (TW) of wave detector often reaches several tons, and field operation personnel's labour intensity is very big.

The wave detector that uses in seismic prospecting at present is all by plastic casing be contained in that core body in the shell forms.The effect of plastic casing is protection core body, constant transmissions cable, tail cone and water-tight is installed.Detector core body is dynamo-electric conversion portion, is made up of magnet steel and the moving coil that is enclosed within the magnet steel outside, and when the ground of embedding wave detector caused vibrations by focus, the electric signal that core body output is relevant with vibrations was delivered to and handled in the seismograph and record.The core body of wave detector is the permanent type encapsulation, and promptly after the core body assembling finished, the shell of core body sealed with volume pressure mode, was not easy to open and overhaul.Core body is packed into behind the plastic casing, and transmission cable is drawn through rubber cap, compresses with the cover plate of plastic casing, by screw retention with make the wave detector sealing.

Task of the present invention is the seismoreceiver of a kind of small-sized no special plastic shell of design.The more existing wave detector of its volume and weight reduces greatly, and the electromechanical properties requirement of seismic exploration contentedly.

Task of the present invention is solved by following method.This wave detector has the metal outer cylinder of a lengthening thickening, and the sensitive system that is made of garden cylindricality magnet steel, spring leaf and coil winding is contained in this metal outer cylinder, uses the O-ring seal segmented seal between the loam cake of urceolus and lower cover and the urceolus.The following pole shoe of magnet steel be screwed under cover, the below of lower cover is to connect flare nut, tail cone directly is contained in and connects on the flare nut.The top of loam cake compresses with rubber cap, O-ring seal gland and card, makes wave detector overall fixed and sealing, is convenient to dismounting again.The appearance of urceolus is done protective seam with plastic-blasting or coated, reduces volume and weight.

Following accompanying drawing is examples of implementation of this wave detector.

Fig. 1 is wave detector urceolus 21 synoptic diagram.A U-lag of placing output cable and rubber cap fairlead 29, a draw-in groove 30 that is used for fixing card are arranged in the upper end of wave detector urceolus 21, and there is an omoplate 31 lower end, is used for fixing lower cover 14 and connects flare nut 15.The surface of urceolus 21 is protective seams 32.

Fig. 2 is a wave detector general assembly synoptic diagram.Lower cover 14, be enclosed within lower cover 14 Suprascapular O-ring seals 20 and meet omoplate 31 places that flare nut 15 is fixed on urceolus 21, tail cone 17 is contained in by on the flare nut 15, is enhanced leaktightness, tail cone 17 with connect flare nut 15 connection places and place an O-ring seal 18.By upper and lower spring leaf 8 ' and 8 "; the band binding post 27 ' little contact chip 22; band binding post 27 " big contact chip 24, insulating trip 23, with upper and lower pole shoe 9 ' and 9 " garden cylindricality magnet steel 13; belt coil winding 12 ', 12 ", the sensitive system that constitutes of the coil former 10 of copper wire circle 25 and dead ring 11, be fixed on the lower cover 14 by screw 16 and O-ring seal 19.Binding post 27 ' and 27 " draw in the hole of the loam cake 7 above being pressed in sensitive system and being embedded in the insulator 26 hole, binding post 27 ' and 27 " between join the resistance 5 that welds a suitable resistance, link to each other with two output cables 28 respectively again.Embed an O-ring seal 6 that is used for fixing and seals the wave detector sensitive system at the omoplate place that loam cake 7 contacts with urceolus 21, on loam cake 7, there is an its underpart to be with the rubber cap 3 of pressure ring 4, output cable 28 passes from the fairlead of rubber cap 3, the fairlead of rubber cap 3 and cable 28 embed in the U-lag 29 of urceolus 21, compress by gland 2, by the card 1 that embeds in the draw-in groove 30 member in the urceolus 21 is fixed, and made wave detector form sealing state.

Advantage of the present invention is: owing to adopt segmented seal, good seal performance. Wave detector adopts the urceolus that lengthens thickening to replace common core body shell; be used for magnetic conduction, protect sensitive system and make sensitive system location, fixing tail cone; and adopt plastic-blasting or coated to make protective layer on the urceolus surface; removed the special plastic shell; thereby volume is little; in light weight, reduced field construction labour intensity, saved simultaneously plastic casing Mould Machining expense and Master Cost. Upper end at the wave detector urceolus tightens with card, replaces the permanent type encapsulation, thereby is convenient to laid-up.

This small-size geophone is succeeded in developing by our factory, batch production. The wave detector weight saving 50% that the weight of wave detector is commonly used more at present, fee of material descends about 20%. Its basic parameter is: intrinsic frequency: 15 hertz, and internal resistance: 320 ohm, sensitivity: 0.25 volt/cel, diameter: φ 23.6mm, highly: 90mm(connects tail cone), weight: 100 grams.

Claims

1, a kind of small-sized seismoreceiver, be to constitute by metal outer cylinder and the sensor that is contained in the urceolus, it is characterized in that: a metal outer cylinder 21, its upper end has a U-lag 29 and a card slot 30 that is used for fixing card that is used to place output cable 28, its lower end to have one to be used for lower cover 14, to be enclosed within lower cover 14 Suprascapular O-ring seals 20 and to connect flare nut 15 and be fixed to omoplate 31 on the metal outer cylinder 21; By upper spring sheet 8 ', lower spring sheet 8 "; the band binding post 27 ' little contact chip 22; band binding post 27 " big contact chip 24, insulating trip 23, band up and down pole shoe 9 ' and 9 " garden cylindricality magnet steel 13; have coil winding 12 ', 12 ", the sensitive system that constitutes of the coil former 10 of dead ring 11 and wire loop 25, be fixed on the lower cover 14 by screw 16 and O-ring seal 19; Binding post 27 ' and 27 " draw in the hole of the loam cake 7 above being pressed in sensitive system and being embedded in the insulator 26 hole, binding post 27 ' and 27 " between join the resistance 5 that welds a suitable resistance, be connected with two output cables 28 respectively again; Embed an O-ring seal 6 that is used for fixing and seals the wave detector sensitive system at the omoplate place that loam cake 7 contacts with urceolus 21, there is an its underpart to be with the rubber cap 3 of pressure ring 4 on the top of loam cake 7, output cable 28 passes from the fairlead of rubber cap 3, rubber cap 3 embeds in the U type groove 29 with output cable 28, compressed by gland 2, the card 1 that embeds in the draw-in groove 30 is fixed urceolus 21 inner members.

2, according to the small-sized seismoreceiver of claim 1, it is characterized in that: tail cone 17 is installed in by an O-ring seal 18 and connects on the flare nut 15.

3, according to the small-sized seismoreceiver of claim 1 and 2, it is characterized in that: the outside surface of urceolus 21 adopts plastic-blasting or coating method to constitute protective seam 32.