Connection structure for earthquake observation cave weak signal transmission line

Abstract

The utility model belongs to the technical field of seismological observation, and particularly discloses a connecting structure for seismological observation cave weak signal transmission lines, which comprises a sleeve shell and a shaping chamber, the shaping chamber is arranged between material guide grooves in the sleeve shell, three groups of wire inlets are arranged in the right side of the sleeve shell, and the right side of the sleeve shell is provided with three groups of wire outlets. An upper wire harness is transversely inserted into the top end of the interior of the sleeve shell, and a middle wire harness is transversely inserted into the center of the interior of the sleeve shell. According to the connecting structure for the earthquake observation cave weak signal transmission line, the metal ring is fixedly connected in the annular groove, the metal rod serves as a tool for sealing and balancing the metal ring to be welded, the inner side wall of the metal ring is clamped in the annular groove of the rubber sleeve, and the front end and the rear end of the bottom of the metal ring are fixed through the supporting rod and the foot pad. And when lightning stroke occurs, electric power can be conducted into soil by virtue of an electricity leading mechanism formed by the metal rod, the metal ring and the supporting rod, so that the problem of lack of lightning stroke protection is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of earthquake observation technology, concretely is a kind of connecting structure for weak signal transmission line of earthquake observation cave. BACKGROUND

[0002] Earthquake observation is the process of monitoring natural or man-made seismic waves and regional geophysical fields using geophysical observation equipment such as VP-type wideband tiltmeter, gPhone-type relative gravimeter, JS-120 very wideband seismometer, etc. In order to reduce the efficiency of picking up weak geophysical field observation signals by geophysical observation equipment, the observation equipment is placed in a hundreds of meters deep observation cave for observation, which is internationally recognized as the most ideal and easy to implement "ultra-clean" and "ultra-quiet" earthquake observation method. However, at the same time, it introduces the problems of weak geophysical field observation signal transmission in hundreds of meters channel, such as lightning strike by electromagnetic induction, signal line is complex, leading to wiring difficulty, cable mutual entanglement and electromagnetic interference, etc. In order to solve the above-mentioned hidden trouble, optical fiber transmission with mature technology, low loss and good lightning protection performance is usually introduced.

[0003] In order to connect each group of instruments and transmit signals through the cable of optical fiber transceiver at the host computer, weak observation signal transmission cable is needed, which is laid in the cave without protection, and there is lack of connecting structure between each wire bundle, which is easy to crack due to external rock bumping and vibration wave, not to mention the function of lightning protection, and each device may have short circuit and even crash.

[0004] Now, a new type of connecting structure for weak signal transmission line of earthquake observation cave is proposed to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a kind of connecting structure for weak signal transmission line of earthquake observation cave, to solve the problem of lack of lightning protection of transmission line proposed in the above background technology.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a kind of connecting structure for weak signal transmission line of seismic observation cave, including casing and shaping chamber, shaping chamber is arranged between the inside guide chute of casing, the inside of the right side of casing is provided with three groups of incoming line port, the top of the inside of casing is transversely inserted with upper wire bundle, the center of the inside of casing is transversely inserted with intermediate wire bundle, the bottom of the inside of casing is transversely inserted with lower wire bundle, the surface of the both sides of the outside of casing is respectively fixed with rubber sleeve, and the inside of rubber sleeve is provided with annular groove, metal ring is fixedly connected in annular groove, and metal ring is transversely fixed with metal rod between the top of metal ring, the front end and the rear end of the bottom of metal ring are respectively fixed with support rod, and the bottom of support rod is fixed with foot pad, the inside of foot pad is provided with hole, and fastening bolt is threadedly connected in hole.

[0007] As a further technical scheme of the utility model, the metal rod is horizontally erected at the center of the top of the casing, and the metal ring has the same curvature as the annular groove.

[0008] As a further technical scheme of the utility model, the metal ring, the annular groove and the rubber sleeve are arranged in concentric circles, and the metal rod tightens the gap of the metal ring at the bottom.

[0009] As a further technical scheme of the utility model, the left side of the outside of the casing is fixed with a shunt frame, the rear of the inside of the shunt frame is welded with a vertical plate, screw holes are arranged between the upper and lower parts of the front end of the vertical plate, a slot is arranged on the left side of the outside of the shunt frame, sleeve blocks are inserted into the upper and lower parts and the center of the inside of the slot, a through slot is arranged in the inside of the sleeve block, and a reinforcing bolt is threadedly connected in the hole slot in the inside of the sleeve block.

[0010] As a further technical scheme of the utility model, the upper wire bundle, the intermediate wire bundle and the lower wire bundle are respectively inserted into the incoming line port, and the upper wire bundle, the intermediate wire bundle and the lower wire bundle can pass through the through slot.

[0011] As a further technical scheme of the utility model, the rear of the reinforcing bolt is embedded in the screw hole, and the sleeve block can move up and down along the inside of the slot.

[0012] As a further technical scheme of the utility model, two groups of limiting blocks are welded between the upper and lower parts of the inside of the casing, transverse grooves are respectively arranged between the two sides of the inside of the limiting blocks, clamping sleeves are respectively fixed on the upper and lower parts of the inside of the transverse groove, silica gel gaskets are respectively fixed in the inside of the clamping sleeves, and the upper wire bundle, the intermediate wire bundle and the lower wire bundle pass through the transverse groove.

[0013] As a further technical scheme of the utility model, the upper wire bundle, the intermediate wire bundle and the lower wire bundle are respectively on the same horizontal plane as the transverse groove, and the silica gel gaskets are respectively symmetrically attached to the top and bottom of the upper wire bundle, the intermediate wire bundle and the lower wire bundle.

[0014] Compared with the prior art, the connecting structure for the weak signal transmission line of the earthquake observation cave has the advantages that lightning protection is realized, the wiring direction is adjusted, and cable collision is avoided.

[0015] (1) The metal ring is fixedly connected in the annular groove, an opening is left at the top of the metal ring, a metal rod welded above is used as a closed and balanced connection, the inner side wall of the metal ring is clamped in the annular groove of the rubber sleeve, and the front and rear ends of the bottom are fixed by the supporting rods and the foot pads, and then the fastening bolts in the holes are twisted to install, if lightning strikes, the electric power can be guided into the soil by the electric conduction mechanism formed by the metal rod, the metal ring and the supporting rod, and the multiple cables in the protective shell are protected.

[0016] (2) The shunt frame is fixed to the left side of the shell, the left sides of the upper cable bundle, the middle cable bundle and the lower cable bundle are introduced into the corresponding sleeve blocks through the shunt frame, the position and angle of the sleeve block are adjusted in the left slot, and then the reinforcing bolts are rotated from the front to lock, the angle of the cable output can be adjusted according to the installation position of the VP type wideband tiltmeter, the gPhone type relative gravimeter and the JS-120 very wideband seismometer, so that the cable is prevented from being damaged due to extrusion, and the problems of communication delay and poor data aggregation rate caused by unreasonable transmission line distribution are solved.

[0017] (3) Two groups of limiting blocks are welded between the upper and lower parts of the shell, when the upper cable bundle, the middle cable bundle and the lower cable bundle respectively pass through the wire inlet into the shell, they will pass through the two groups of limiting blocks and be embedded in the horizontal grooves, and the rubber outer sheath of the cable is locked by the clamps installed on the left side of the horizontal groove through the silica gel gasket, so that the displacement of the upper cable bundle, the middle cable bundle and the lower cable bundle due to vibration is avoided, and the stable connection of the three cables to the host is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a front view of the sectional structure of the utility model;

[0019] Figure 2 It is a side view of the sectional structure of the shell of the utility model;

[0020] Figure 3 It is a front view of the sectional structure of the shunt frame of the utility model;

[0021] Figure 4 It is a front view of the sectional structure of the shell of the utility model.

[0022] In the figure: 1, the shell; 2, limit block; 3, shunt frame; 4, slot; 5, vertical plate; 6, screw hole; 7, intermediate wire harness; 8, sleeve block; 9, reinforcing bolt; 10, through slot; 11, metal rod; 12, annular groove; 13, sleeve; 14, transverse groove; 15, rubber sleeve; 16, wire inlet; 17, upper wire harness; 18, lower wire harness; 19, silica gel gasket; 20, sizing chamber; 21, metal ring; 22, foot pad; 23, fastening bolt; 24, hole; 25, support rod. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Please refer to Figures 1-4 The utility model provides an embodiment: a kind of connecting structure for weak signal transmission line of seismic observation cave, including shell 1 and sizing chamber 20, shell 1 inside material guide groove between being provided with sizing chamber 20, the right side of shell 1 is provided with three groups of wire inlet 16, the top end of shell 1 inside is transversely inserted with upper wire harness 17, the center of shell 1 inside is transversely inserted with intermediate wire harness 7, the bottom end of shell 1 inside is transversely inserted with lower wire harness 18, the surface of both sides of shell 1 outside is respectively fixed with rubber sleeve 15, and the inside of rubber sleeve 15 is provided with annular groove 12, annular groove 12 is fixedly connected with metal ring 21, and the top of metal ring 21 is transversely fixed with metal rod 11 between, the front end and rear end of the bottom of metal ring 21 are respectively fixed with support rod 25, and the bottom of support rod 25 is fixed with foot pad 22, the inside of foot pad 22 is provided with hole 24, and hole 24 is threadedly connected with fastening bolt 23;

[0025] Metal rod 11 is horizontally erected at the center of the top end of shell 1, metal ring 21 and annular groove 12 have the same curvature, metal ring 21, annular groove 12 and rubber sleeve 15 are arranged in concentric circles, metal rod 11 tightens the gap of metal ring 21 at the bottom;

[0026] Specifically, as Figure 1 And Figure 2As shown, the top of the metal ring 21 is left with an opening, which can be closed and balanced by the metal rod 11 welded above, the inner side wall of the metal ring 21 is clamped in the annular groove 12 of the rubber sleeve 15, and the front and rear ends of the bottom are fixed by the support rod 25 and the foot pad 22, and then the tightening bolt 23 in the hole 24 is twisted to implement installation. If lightning strikes, the electric power can be guided into the soil by the electric conduction mechanism formed by the metal rod 11, the metal ring 21 and the support rod 25.

[0027] The left side of the shell 1 outside is fixed with a shunt frame 3, the rear of the shunt frame 3 inside is welded with a vertical plate 5, the upper and lower parts of the front end of the vertical plate 5 are provided with screw holes 6, the left side of the shunt frame 3 outside is provided with a slot 4, and the upper and lower parts and the center of the slot 4 inside are respectively inserted with sleeve blocks 8, the inside of the sleeve block 8 is provided with a through slot 10, and the hole slot inside the sleeve block 8 is threadedly connected with a reinforcing bolt 9;

[0028] The upper wire bundle 17, the middle wire bundle 7 and the lower wire bundle 18 are respectively inserted into the wire inlet 16, the upper wire bundle 17, the middle wire bundle 7 and the lower wire bundle 18 can pass through the through slot 10, the reinforcing bolt 9 is embedded in the screw hole 6 at the rear, and the sleeve block 8 can move up and down along the inside of the slot 4;

[0029] Specifically, as shown in Figure 1 and Figure 3 , the left sides of the upper wire bundle 17, the middle wire bundle 7 and the lower wire bundle 18 are respectively introduced into the corresponding sleeve block 8 through the shunt frame 3, the position and angle of the sleeve block 8 in the left slot 4 are adjusted, and then the reinforcing bolt 9 is rotated from the front to lock, and the angle of the cable leading out can be adjusted according to the installation position of the VP type wideband tiltmeter, gPhone type relative gravimeter, JS-120 very wideband seismometer and other equipment.

[0030] Two groups of limiting blocks 2 are welded between the upper and lower parts of the shell 1 inside, and horizontal grooves 14 are respectively arranged between the two sides of the limiting blocks 2 inside, the upper and lower parts of the horizontal grooves 14 inside are respectively fixed with clamping sleeves 13, and the inside of the clamping sleeves 13 is fixed with silica gel pads 19, the upper wire bundle 17, the middle wire bundle 7 and the lower wire bundle 18 respectively pass through the horizontal grooves 14;

[0031] The upper wire bundle 17, the middle wire bundle 7 and the lower wire bundle 18 are respectively in the same horizontal plane with the horizontal grooves 14, and the silica gel pads 19 are respectively symmetrically attached to the top and bottom of the upper wire bundle 17, the middle wire bundle 7 and the lower wire bundle 18;

[0032] Specifically, as shown in Figure 1 and Figure 4When the upper wire bundle 17, the middle wire bundle 7 and the lower wire bundle 18 each pass into the sleeve 1 through the wire inlet 16, they will pass through the two groups of limiting blocks 2 and be embedded in the horizontal groove 14, and the clamping sleeve 13 installed at the upper and lower positions of the inner side of the horizontal groove 14 locks the external rubber of the cable through the silica gel gasket 19, so that displacement of the upper wire bundle 17, the middle wire bundle 7 and the lower wire bundle 18 due to vibration can be avoided.

[0033] Principle: In use, the top of the metal ring 21 is left with an opening, which can be closed and balanced by the metal rod 11 welded above, the inner side wall of the metal ring 21 is clamped in the annular groove 12 of the rubber sleeve 15, and the front and rear ends of the bottom are fixed by the support rod 25 and the foot pad 22, and then the fastening bolt 23 in the hole 24 is screwed to implement installation, if lightning strikes, the electric power can be guided into the soil by the electric conduction mechanism formed by the metal rod 11, the metal ring 21 and the support rod 25, when the upper wire bundle 17, the middle wire bundle 7 and the lower wire bundle 18 each pass into the sleeve 1 through the wire inlet 16, they will pass through the two groups of limiting blocks 2 and be embedded in the horizontal groove 14, and the clamping sleeve 13 installed at the upper and lower positions of the inner side of the horizontal groove 14 locks the external rubber of the cable through the silica gel gasket 19, so that displacement of the upper wire bundle 17, the middle wire bundle 7 and the lower wire bundle 18 due to vibration can be avoided, finally the left sides of the upper wire bundle 17, the middle wire bundle 7 and the lower wire bundle 18 are respectively threaded into the corresponding sleeve block 8 through the shunt frame 3, the position and angle of the sleeve block 8 are adjusted in the left slot 4, and then the reinforcing bolt 9 is rotated from the front to lock, the angle of the cable output can be adjusted according to the installation position of the VP new wideband tiltmeter, gPhone relative gravimeter, JS120 very wideband tiltmeter and other equipment, compared with the traditional way, the data continuity rate, data aggregation filtering and data quality are obviously improved.

[0034] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the involved claims.

Claims

1. A connecting structure for a weak signal transmission line of a seismic observation cave, comprising a sleeve (1) and a shaped chamber (20), characterized in that: The inside of the shell (1) is provided with a shaping chamber (20) between the material guide grooves, the right side of the shell (1) is internally provided with three groups of wire inlet ports (16), the top end of the inside of the shell (1) is transversely inserted with an upper wire bundle (17), the center of the inside of the shell (1) is transversely inserted with a middle wire bundle (7), the bottom end of the inside of the shell (1) is transversely inserted with a lower wire bundle (18), the two side surfaces of the outside of the shell (1) are respectively fixed with rubber sleeves (15), and the inside of the rubber sleeve (15) is provided with an annular groove (12), the annular groove (12) is fixedly connected with a metal ring (21), and the top of the metal ring (21) is transversely fixed with a metal rod (11), the front end and the rear end of the bottom of the metal ring (21) are respectively fixed with support rods (25), and the bottom of the support rod (25) is fixed with a foot pad (22), the inside of the foot pad (22) is provided with a hole (24), and the hole (24) is threadedly connected with a fastening bolt (23).

2. The connecting structure for the weak signal transmission line of the seismic observation cave according to claim 1, characterized in that: The metal rod (11) is horizontally erected at the center of the top end of the shell (1), and the metal ring (21) has the same curvature as the annular groove (12).

3. The connecting structure for the weak signal transmission line of the seismic observation cave according to claim 1, characterized in that: The metal ring (21), the annular groove (12) and the rubber sleeve (15) are arranged in concentric circles, and the metal rod (11) tightens the gap of the metal ring (21) at the bottom.

4. The connecting structure for the weak signal transmission line of the seismic observation cave according to claim 1, characterized in that: The left side of the outside of the shell (1) is fixed with a shunt frame (3), the rear of the inside of the shunt frame (3) is welded with a vertical plate (5), screw holes (6) are arranged between the upper and lower portions of the front end of the vertical plate (5), the left side of the outside of the shunt frame (3) is provided with a slot (4), and the upper and lower portions and the center of the inside of the slot (4) are respectively inserted with sleeve blocks (8), the inside of the sleeve block (8) is provided with a through groove (10), and the hole groove in the inside of the sleeve block (8) is threadedly connected with a reinforcing bolt (9).

5. The connecting structure for the weak signal transmission line of the seismic observation cave according to claim 4, characterized in that: The upper wire bundle (17), the middle wire bundle (7) and the lower wire bundle (18) respectively pass through the wire inlet ports (16), and the upper wire bundle (17), the middle wire bundle (7) and the lower wire bundle (18) can pass through the through groove (10).

6. The connecting structure for the weak signal transmission line of the seismic observation cave according to claim 4, characterized in that: The rear of the reinforcing bolt (9) is embedded in the screw hole (6), and the sleeve block (8) can move up and down along the inside of the slot (4).

7. The connecting structure for the weak signal transmission line of the seismic observation cave according to claim 1, characterized in that: Two groups of limiting blocks (2) are welded between the upper and lower portions of the inside of the shell (1), and transverse grooves (14) are respectively arranged between the two sides of the inside of the limiting block (2), the upper and lower portions of the inside of the transverse groove (14) are respectively fixed with clamping sleeves (13), the inside of the clamping sleeve (13) is fixed with a silica gel gasket (19), and the upper wire bundle (17), the middle wire bundle (7) and the lower wire bundle (18) respectively pass through the transverse groove (14).

8. The connecting structure for the weak signal transmission line of the seismic observation cave according to claim 7, characterized in that: The upper wire bundle (17), the middle wire bundle (7) and the lower wire bundle (18) are respectively in the same horizontal plane as the transverse groove (14), and the silica gel gasket (19) is respectively symmetrically attached to the top and bottom of the upper wire bundle (17), the middle wire bundle (7) and the lower wire bundle (18).

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