CN201780376U

CN201780376U - Novel seismic detector

Info

Publication number: CN201780376U
Application number: CN2010205004275U
Authority: CN
Inventors: 薛立武; 邵欣; 黄峰; 段亚玲; 马芳
Original assignee: China National Petroleum Corp; BGP Inc
Current assignee: China National Petroleum Corp; BGP Inc
Priority date: 2010-08-20
Filing date: 2010-08-20
Publication date: 2011-03-30
Anticipated expiration: 2020-08-20

Abstract

A novel seismic detector is applied to the field of geophysical exploration. The seismic detector is characterized in that internal magnets are embedded in external wall grooves of internal magnet frames; circular coil racks are sleeved outside internal magnet sheaths; circular grooves on the external walls of the coil racks are provided with coil windings; spring piece cushion blocks are respectively arranged at the two ends of the internal magnet frames; spring pieces are respectively arranged at the two ends of the spring piece cushion blocks; the external edges of the two spring pieces are respectively fixed at the two ends of the coil racks by clamp rings; the upper ends of the coil racks are provided with enamelled leads which are connected with binding posts; core shells are arranged between an upper cover and a lower cover; external magnets are embedded on the external walls of the core shells; and the coil racks are supported in gap magnetic fields by the two spring pieces and can vibrate along the direction of axis. The utility model has the following beneficial effects: the utility model changes the structures of the existing seismic detectors, ensures the magnetic fields in the magnetic circuits to be stronger and more uniform and ensures the novel seismic detector to have smaller volume and higher performance; and the detector with small volume is convenient for field construction, can save manpower and is more convenient to use.

Description

A kind of New Type Seismic Geophone

Technical field

The utility model relates to the geophysical exploration technology field, particularly a kind of seismoreceiver that is used for the artificial earthquake exploration process.

Background technology

At present, the wave detector of geophysical survey mainly adopts DYN dynamic velocity profile wave detector, the basic structure of DYN dynamic velocity profile wave detector is that the electromechanical transducer coil passes through two spring-strip suspensions up and down in belt space, magnetic field, magnetic field in the space is the radial radiation shape and distributes, and coil is formed a vibrational system with two spring leafs up and down.Consult Fig. 1.

DYN dynamic velocity profile wave detector mainly contains compositions such as loam cake, spring leaf, coil system (twin coil), magnetic system (magnet steel, yoke), shell and lower cover.When receiving vibration signal, the wave detector shell fixes on the ground, and when shell during with ground vibration, coil is because inertia lags behind the motion of shell, and coil and magnetic field have produced relative motion, cutting magnetic line, and the generation induction electromotive force is an output signal in coil.This structure can not make full use of the high-performance of rare-earth magnet, especially the thin slice application characteristic of rare-earth magnet.

Rare-earth magnet is to have high-coercive force, high performance permanent magnet, if in the application of seismoreceiver, can make full use of the high-performance of rare-earth magnet, designs novel magnetic structure, can be so that the gap field intensity in the wave detector becomes higher, more even.

The utility model content

The purpose of this utility model is: a kind of New Type Seismic Geophone is provided, utilizes the high-performance of rare-earth magnet and the thin slice application characteristic of rare-earth magnet fully, reach the seismoreceiver dependable performance, dwindle the seismoreceiver volume, make processing and manufacturing simpler.

The technical solution adopted in the utility model is: New Type Seismic Geophone, constitute by loam cake, enamel-cover lead, binding post, coil former, coil winding, inner magnet, inner sheath, inner magnet framework, spring leaf cushion block, spring leaf, snap ring, core body shell, outer magnet, core body oversheath and lower cover, it is characterized in that: annular inner magnet is embedded in the outer wall groove of annular inner magnet framework, on the outer wall of inner magnet and inner magnet framework, inner sheath is arranged, by internal magnet sheath protection inner magnet and inner magnet framework; Internal magnet sheath outside is with the toroid winding frame, in the annular groove coil winding is arranged on the outer wall of coil former; Two ends at the inner magnet framework have the spring leaf cushion block respectively, and the spring leaf cushion block has center pit; Two ends at the spring leaf cushion block have spring leaf respectively.The outer edge of spring leaf is fixed on coil former upper end and coil former lower end by snap ring respectively.Loam cake is arranged at the spring leaf top in the upper end, and the center pit that cylinder inserts upper springs sheet cushion block is protruded in the loam cake lower end; The coil former upper end is symmetrically connected with the enamel-cover lead, and the other end of enamel-cover lead connects the lower end of binding post, and loam cake is passed in the upper end of binding post.Lower cover is arranged at the spring leaf bottom in the lower end, and the center pit that cylinder inserts lower springs sheet cushion block is protruded in the lower cover upper end; The core body shell is arranged between loam cake and lower cover and around loam cake and lower cover, be inlaid with outer magnet in the outer wall ring groove of core body shell, form gap magnetic field between outer magnet and the inner magnet, coil former is supported in the gap magnetic field by two spring leafs, and coil former can vibrate along axis direction.

Coil winding is unicoil winding or twin coil back-roll winding construction.

The core body oversheath can be a square tube shape, and loam cake and lower cover are square; The core body oversheath also can be a cylindrical shape, and loam cake and lower cover are circular.

When inner magnet was permanent magnet, outer magnet was a permeability magnetic material, formed gap magnetic field; Or outer magnet is when being permanent magnet, and inner magnet is a permeability magnetic material, forms gap magnetic field.

The beneficial effects of the utility model: this New Type Seismic Geophone, changing existing seismoreceiver structure, make the magnetic field in the magnetic circuit stronger, more even, make that the New Type Seismic Geophone volume is littler, performance is higher.Form stronger, more uniform magnetic field between internal magnet and the external magnet, spring leaf is suspended on the coil coasting body in the magnetic field, and the coil coasting body can be vibrated along axis direction, and the wave detector that volume is little is convenient to field construction, can save manpower, and is more convenient to use.

Description of drawings

Fig. 1 is existing DYN dynamic velocity profile detector structure diagrammatic cross-section.

Fig. 2 is a New Type Seismic Geophone structural profile synoptic diagram.

Fig. 3 is the vertical view of Fig. 2.

Among the figure, 1. loam cake, 2. enamel-cover lead, 3. binding post, 4. coil former, 5. coil winding, 6. inner magnet, 7. inner sheath, 8. inner magnet framework, 9. spring leaf cushion block, 10. spring leaf, 11. snap rings, 12. core body shells, 13. outer magnets, 14. core body oversheaths, 15. lower covers.

Embodiment

Embodiment 1: with reference to Fig. 2.New Type Seismic Geophone is made of loam cake 1, enamel-cover lead 2, binding post 3, coil former 4, coil winding 5, inner magnet 6, inner sheath 7, inner magnet framework 8, spring leaf cushion block 9, spring leaf 10, snap ring 11, core body shell 12, outer magnet 13, core body oversheath 14 and lower cover 15.Annular inner magnet 6 is embedded in the outer wall groove of annular inner magnet framework 8.On the outer wall of inner magnet 6 and inner magnet framework 8, inner sheath 7 is arranged, by internal magnet sheath 7 protection inner magnet 6 and inner magnet frameworks 8; Internal magnet sheath 7 outsides are with toroid winding frame 4, and coil winding 5 is arranged in the annular groove on the outer wall of coil former 4, and coil winding 5 is unicoil windings.Two ends at inner magnet framework 8 have spring leaf cushion block 9 respectively, and spring leaf cushion block 9 has center pit; Two ends at spring leaf cushion block 9 have spring leaf 10 respectively.The outer edge of spring leaf 10 is fixed on coil former 4 upper ends and coil former 4 lower ends by snap ring 11 respectively.Loam cake 1 is arranged at spring leaf 10 tops in the upper end, and the center pit that cylinder inserts upper springs sheet cushion block 9 is protruded in loam cake 1 lower end; Coil former 4 upper ends are symmetrically connected with enamel-cover lead 2, and the other end of enamel-cover lead 2 connects the lower end of binding post 3, and loam cake 1 is passed in the upper end of binding post 3.Lower cover 15 is arranged at spring leaf 10 bottoms in the lower end, and the center pit that cylinder inserts lower springs sheet cushion block 9 is protruded in lower cover 15 upper ends; Between loam cake 1 and lower cover 15 and around loam cake 1 and lower cover 15 core body shell 12 is arranged, be inlaid with outer magnet 13 in the outer wall ring groove of core body shell 12, inner magnet 6 is a permanent magnet, and outer magnet 13 is permeability magnetic materials, forms gap magnetic field.Form gap magnetic field between outer magnet 13 and the inner magnet 6, coil former 4 is supported in the gap magnetic field by two spring leafs 10, and coil former 4 can vibrate along axis direction.Consult Fig. 3.Core body oversheath 14 is square tube shapes, core body oversheath 14 length of side 300mm, and height 250mm, loam cake 1 and lower cover 15 are square.

Embodiment 2: embodiment 2 with embodiment 1 difference is: core body oversheath 14 is cylindrical shapes, and loam cake 1 and lower cover 15 are circular.Outer magnet 13 is a permanent magnet, and inner magnet 6 is permeability magnetic materials, forms gap magnetic field.

Claims

1. New Type Seismic Geophone, constitute by loam cake (1), enamel-cover lead (2), binding post (3), coil former (4), coil winding (5), inner magnet (6), inner sheath (7), inner magnet framework (8), spring leaf cushion block (9), spring leaf (10), snap ring (11), core body shell (12), outer magnet (13), core body oversheath (14) and lower cover (15), it is characterized in that: annular inner magnet (6) is embedded in the outer wall groove of annular inner magnet framework (8), on the outer wall of inner magnet (6) and inner magnet framework (8) inner sheath (7) is arranged; Internal magnet sheath (7) outside is with toroid winding frame (4), and coil winding (5) is arranged in the annular groove on the outer wall of coil former (4); At the two ends of inner magnet framework (8) spring leaf cushion block (9) is arranged respectively, spring leaf cushion block (9) has center pit; At the two ends of spring leaf cushion block (9) spring leaf (10) is arranged respectively, the outer edge of two spring leafs (10) is fixed on coil former (4) upper end and coil former (4) lower end by snap ring (11) respectively; Loam cake (1) is arranged at spring leaf (10) top in the upper end, and the center pit that cylinder inserts upper springs sheet cushion block (9) is protruded in loam cake (1) lower end; Coil former (4) upper end is symmetrically connected with enamel-cover lead (2), and the other end of enamel-cover lead (2) connects the lower end of binding post (3), and loam cake (1) is passed in the upper end of binding post (3); Lower cover (15) is arranged at spring leaf (10) bottom in the lower end, and the center pit that cylinder inserts lower springs sheet cushion block (9) is protruded in lower cover (15) upper end; Between loam cake () 1 and lower cover () 15 and at loam cake (1) and lower cover (15), core body shell (12) is arranged on every side, be inlaid with outer magnet (13) in the outer wall ring groove of core body shell () 12, form gap magnetic field between outer magnet (13) and the inner magnet (6), coil former (4) is supported in the gap magnetic field by two spring leafs (10).

2. New Type Seismic Geophone according to claim 1 is characterized in that: coil winding (5) is unicoil winding or twin coil back-roll winding.

3. New Type Seismic Geophone according to claim 1 and 2 is characterized in that: core body oversheath (14) is a square tube shape, and loam cake (1) and lower cover (15) are square.

4. New Type Seismic Geophone according to claim 1 and 2 is characterized in that: core body oversheath (14) is a cylindrical shape, and loam cake (1) and lower cover (15) are circular.

5. New Type Seismic Geophone according to claim 1 and 2 is characterized in that: when inner magnet (6) was permanent magnet, outer magnet (13) was a permeability magnetic material.

6. New Type Seismic Geophone according to claim 1 and 2 is characterized in that: or outer magnet (13) is when the permanent magnet, and inner magnet (6) is a permeability magnetic material.