CN209324338U - A kind of single-core cable relay transmission device - Google Patents

Abstract

A kind of single-core cable relay transmission device, including sealing structural component and bus circuit plate, wherein the sealing structural component includes single-core cable again, wire bushing, pressure ring, external conical sleeve, decompose screwed ring, inner conical drogue, and tight ring, fitting body, lock nut, sealed body, screwed ring, O-ring seal, switching sealing-plug, screw, helmet, utility model has the advantages that effectively reducing the length of instrument pipe nipple, instrumental transmission distance is remote, all pipe nipples of same type can be compatible with, it is good to exchange performance, the bottleneck of underground long range high-speed transfer is got through, it considerably reduces and interconnects the manufacturing cost of the cable connector used and the manufacturing cost of nipple body between instrument pipe nipple, in such a way that relay forwards, the bus of original broadcast type is segmented step by step, it reduces the line capacitance of cable between grade and then can be realized high by 400 The communication signal of 0Kbps rate it is reliable defeated, each bus splitter can be identical in structure, this makes instrument convenient for production quick, convenient for safeguarding.

Description

A kind of single-core cable relay transmission device

Technical field

The utility model relates to the downhole toolbus systems more particularly to a kind of single electricity in a kind of petroleum logging system Cable relay transmission device.

Background technique

At present in oil well logging field, a well logging often uses a variety of or multiple loggers of the same race short Section carries out comprehensive logging in the form of instrument string, and cable distance is respectively less than 50 meters between adjacent apparatuses.In order to improve the survey on stratum Resolution ratio is measured, the sample rate and precision of instrument are constantly promoted, produce a large amount of raw measurement data and need to upload to ground System, the communications portion of general logging system are all divided into two links: the cable communication system on ground to downhole telemetry tool pipe nipple and Remote short section and the direct downhole toolbus system of logger string, in order to improve transmission rate, cable communication system is general Using 7 core armored cables, at present in the logging system of a new generation, the cable transmission rate of LEAP800 reaches 1000Kbps, and intelligent The cable transmission rate of eye 2000 reaches 2048Kbps, although 7 core armored cables can be used in downhole telemetry tool pipe nipple, for Equipped with backup motor, for the logger pipe nipple of multiple sensors, because of space constraints, and the electricity interconnected between grade is considered The cost of manufacture of cable joint generally tends to selection single-core cable and is attached, and passes to be adapted to the cable of 2048Kbps or more Defeated rate then requires downhole toolbus to be at least up to the transmission rate of 2048Kbps, considers error code and retransmit then to be preferably up to The transmission rate of 4000Kbps.

The length of existing transmitting device instrument pipe nipple is longer, and instrumental transmission distance not enough, can not be compatible with same type All pipe nipples, exchange performance is poor, cannot achieve underground long range high-speed transfer, and higher cost, reliability is lower, instrument Production trouble, is not easy to safeguard.

Summary of the invention

According to the above technical problem, the utility model provides a kind of single-core cable relay transmission device, it is characterised in that packet Sealing structural component and bus circuit plate (14) are included, wherein the sealing structural component includes single-core cable (1), wire bushing again (2), pressure ring (3), external conical sleeve (4), decompose screwed ring (5), inner conical drogue (6) and tight ring (7), be fitting body (8), lock nut (9), close Seal main body (10), screwed ring (11), O-ring seal (12), switching sealing-plug (13), screw (15), helmet (16), the single Cable (1) is fixed together by external conical sleeve (4) and inner conical drogue (6), is connect by decomposing screwed ring (5) with fitting body (8), The decomposition screwed ring (5) tenses by pressure ring (3), and the wire bushing (2) is screwed in the tail portion of pressure ring (3), the lock nut (9) It covers in the outer circle of fitting body (8), fixed with simultaneously tight ring (7), the screwed ring (11) covers on sealed body (10), described close Main body (10) are sealed with fitting body (8) by being threadedly coupled, the switching sealing-plug (13) is threadedly secured to sealed body (10) On, it being sealed by the O-ring of itself, one end is connected with single-core cable (1) cable core, and the other end is connected with the contact pin of junior's instrument, The bus circuit plate (14) is fixed on the mounting platform of sealed body (10) with screw (15), and the helmet (16) is device Attachment, the bus circuit plate (14) provide DC power supply for downstream site, and have the pulse encoding and decoding communication of single bus Function, it is further characterized in that, the relaying that DC power supply had both may be implemented in the bus splitter of the bus circuit plate (14) can also To realize the pulse encoding and decoding communication function of uplink single bus and the pulse encoding and decoding communication function of downlink single bus.

The bus circuit plate (14) is circle, and there is switching sealing-plug resigning breach at edge, is fixed by screws in sealing On the mounting platform of main body (10).

The screwed ring (11) is revolution figure modelling, and there is screw thread in outside, and inner hole is unthreaded hole, is manufactured using bronze or beryllium copper, It covers in the outside of sealed body (10) and flexible rotating is without clamping stagnation.

The local received order in direction of the bus circuit plate (14) can give all following stages by single Bus repeater Bus splitter local interface transmitting terminal, and the sheet that the local interface of the bus splitter of all following stages receives The measurement data of instrument pipe nipple can also be transmitted to the local direction of bus circuit plate in such a way that relay step by step uploads Transmitting terminal.

By the isolation inductance and coupled capacitor on bus splitter, whole single-core cable is electrically segmented.

By coding circuit, transmitter driving circuit, decoding circuit receives the units such as driving circuit, realizes in single bus Bipolarity return-to-zero pulse coding mode communication.

The utility model has the following beneficial effects:

1) length of instrument pipe nipple is effectively reduced, instrumental transmission distance is remote, can be compatible with all pipe nipples of same type, exchanges Performance is good, has got through the bottleneck of underground long range high-speed transfer；

2) it considerably reduces and interconnects the manufacturing cost of the cable connector used and the system of nipple body between instrument pipe nipple Cause this；

3) in such a way that relay forwards, the bus of original broadcast type is segmented step by step, reduces cable between grade Line capacitance can be realized the reliable transmission of the up to communication signal of 4000Kbps rate in turn；

4) each bus splitter can be identical in structure, this makes instrument convenient for production quick, convenient for safeguarding.

Detailed description of the invention

Fig. 1 is the structure chart of the bus system of the utility model；

Fig. 2 is the bus splitter functional block diagram of the utility model；

Fig. 3 is the bus splitter uplink transmitter driving circuit of the utility model；

Fig. 4 is the bus splitter uplink receiving driving circuit of the utility model；

Fig. 5 is the utility model structure assembling figure.

Such as figure, 1, single-core cable, 2, wire bushing, 3, pressure ring, 4, external conical sleeve, 5, decompose screwed ring, 6, inner conical drogue, 7, simultaneously Tight ring, 8, fitting body, 9, lock nut, 10, sealed body, 11, screwed ring, 12, O-ring seal, 13, switching sealing-plug, 14, total Line circuit board, 15, screw, 16, helmet.

Specific embodiment

Shown in reference to the accompanying drawing, the utility model is further described: the utility model is a kind of single-core cable Relay transmission device, including sealing structural component and bus circuit plate 14, wherein sealing structural component include again single-core cable 1, Wire bushing 2, external conical sleeve 4, decomposes screwed ring 5, inner conical drogue 6 and tight ring 7, fitting body 8, lock nut 9, sealed body 10, spiral shell at pressure ring 3 Line ring 11, O-ring seal 12, switching sealing-plug 13, screw 15, helmet 16, single-core cable 1 are solid by external conical sleeve 4 and inner conical drogue 6 It is scheduled on together, is connect by decomposing screwed ring 5 with fitting body 8, decompose screwed ring 5 and tensed by pressure ring 3, wire bushing 2 is screwed in pressure The tail portion of ring 3,9 sets of lock nut in the outer circle of fitting body 8, are fixed, screwed ring 11 is revolution figure modelling, and outside has with simultaneously tight ring 7 Screw thread, inner hole are unthreaded hole, are manufactured using bronze or beryllium copper, cover in the outside of sealed body 10 and flexible rotating is without clamping stagnation, sealing With fitting body 8 by being threadedly coupled, switching sealing-plug 13 is threadedly secured on sealed body 10 main body 10, passes through the O of itself The sealing of type circle, one end are connected with 1 cable core of single-core cable, and the other end is connected with the contact pin of junior's instrument, and bus circuit plate 14 is circle There is switching 14 resigning breach of sealing-plug at shape, edge, and bus circuit plate 14 is fixed on the mounting platform of sealed body 10 with screw 15 On, helmet 16 is device fitting, and bus circuit plate 14 provides DC power supply for downstream site, and the pulse for having single bus is compiled Decoded communications function, the local received order in direction of bus circuit plate 14 can be by single Bus repeaters to all following stages The transmitting terminal of the local interface of bus splitter, and this instrument that the local interface of the bus splitter of all following stages receives The measurement data of device pipe nipple can also be transmitted to the hair in the local direction of bus circuit plate in such a way that relay step by step uploads Sending end is electrically segmented whole single-core cable, feature is also by the isolation inductance and coupled capacitor on bus splitter It is, the bus splitter of bus circuit plate 14 both may be implemented the relaying of DC power supply or uplink single bus may be implemented The pulse encoding and decoding communication function of pulse encoding and decoding communication function and downlink single bus sends driving electricity by coding circuit Road, decoding circuit receive the units such as driving circuit, realize the communication of the bipolarity return-to-zero pulse coding mode in single bus.

Fig. 1 is the structure chart of the bus system of the utility model.Bus system includes remote short section 100, at least one

Instrument pipe nipple 2001-200n and multistage single-core cable 5001-500n.

In Fig. 1, bus circuit plate 300 in remote short section 100 is as instrument bus network and cabled communication network The well logging PC of gateway and routing, ground system can be communicated by remote short section 100 and downhole instrument, to realize ground system The conversion between signal in data and single-core cable.

The T-type node that bus splitter 4001-400n can be logically reduced in bus, each T-type section There are three directions: uplink for point all tools, and downlink is local.In terms of power supply, direct current supply is obtained from up direction, is then re-supplied To local and downlink；In communication aspects, the data received from upstream Interface need to be transmitted to downstream interface and local interface, under The data that line interface receives need to be transmitted to upstream Interface and local interface, and the data needs received from local interface are transmitted to Line interface and downstream interface.

Only one the local direction of bus circuit plate 300 and a down direction.In terms of power supply, obtained from local direction Then direct current supply re-supplies downlink；In communication aspects, the data received from local interface need to be transmitted to downstream interface, from The data that downstream interface receives need to be transmitted to local interface.

In summary the function of the bus circuit plate 300 and bus splitter 4001-400n that describe, this bus system are realized The broadcast type network system of one master-slave response mode in logic, ground control command can be from bus circuit plates 300 Local communication interface receives, and the local communication for being then transmitted to all bus splitter 4001-400n in bus step by step connects Mouthful, the response message that the local communication interface of one of bus splitter 4001-400n receives also forwarded step by step until The local communication interface of bus circuit plate 300 is transmitted to ground well logging host by the cable communication system of remote short section in turn.

Fig. 2 is the bus splitter functional block diagram of the utility model.Bus splitter 4001-400n is by L1, L2, C1, C2 And uplink launch driving circuit 401, uplink coding circuit 402, uplink receiving driving circuit 403, upper row decoding circuit 404, 32 high-speed microprocessors 405, downlink coding circuit 406, downlink driving circuit 407, lower row decoding circuit 408, downlink connects Driving circuit 409 is received, DC/DC conversion 410 etc. is partially constituted.

L1, L2 are isolation inductance, and main function is to prevent uplink single-core cable and the signal on downlink single-core cable mutual Crosstalk, while impedance isolation also is carried out to power supply conversion portion.C1 is the coupled capacitor of uplink communication, uplink launch driving circuit The 401 bipolaritys zero code signals issued are capacitively coupled to single-core cable by this, at the same the signal on single-core cable also by This is capacitively coupled to uplink receiving driving circuit 403.C2 is the coupled capacitor of downlink communication, and downlink driving circuit 407 is sent out Bipolarity zero code signal out is capacitively coupled to single-core cable by this, while the signal on single-core cable is also by this capacitor It is coupled to downlink reception driving circuit 409.

Uplink coding circuit 402, upper row decoding circuit 404, downlink coding circuit 406, the function of lower row decoding circuit 408 It can be realized by a piece of complex programmable logic device (CPLD).So-called encoding and decoding, exactly to the bipolar code transmitted in single bus The conversion mutually of one kind of type and UART rs 232 serial interface signal, preferably a kind of bipolarity return-to-zero coding scheme is described as follows:

The level change of UART rs 232 serial interface signal is classified as three kinds of forms: first issued after 2 byte time of bus free The failing edge variation that the low level start bit of a byte generates is labeled as Ef0, and the rising edge variation of subsequent generation is labeled as Es1, The failing edge variation of subsequent generation is labeled as Ef1.UART serial ports rate is fixed as 4000Kbps, and line coding rate is fixed For 8000KHz.After there is Ef0, then coding output (- 1) (0), i.e. this failing edge is encoded as the negative pulse of a 125ns It returns to zero.Similarly, Es1 is encoded as (+1) (- 1), i.e., this rising edge is encoded as positive pulse heel one of a 125ns The negative pulse of 125ns, Ef1 are encoded as (- 1) (+1), i.e. this rising edge negative pulse heel for being encoded as a 125ns The positive pulse of one 125ns.If subsequent change without edge, it is maintained at middle line (zero point) state.Decoding uses this coding The reverse procedure of rule.

Encoding examples:

Using such bipolarity rz coding mode, cable distributed capacitance can be effectively reduced to the shadow of signal of communication It rings.

Fig. 3 is bus splitter uplink transmitter driving circuit, and the major function of this circuit is to generate bipolar pulse and fit With line impedance.R8 and R13 is for connecting uplink coding circuit 402, and coding is output to R8 when being high level, and amplifier U4 output is 0 level, coding be output to R13 be high level when, amplifier output be 9V.If R8, R13 input are low level, amplifier output One intermediate level (4.5V).R5 is the powerful resistance of one small resistance value, for matching with line impedance.

Bus splitter uplink receiving driving circuit when Fig. 4, the major function of this circuit are connect to bipolar pulse Folding and unfolding is big, and polarity judging result is then output to upper row decoding circuit 404.Capacitor C24 for realizing AC signal coupling, Amplifier U9 is used to amplify signal shaping, and U7A, U7B form a two limit comparison circuit, realize the polarity of bipolar signal Judgement finally exports judging result to upper row decoding circuit 404.

Uplink described in transmitter driving circuit and reception driving circuit principle and circuit composition and Fig. 3, Fig. 4 in terms of downlink Aspect is identical.

32 high-speed microprocessors 405 are responsible for the communication and logic control of bus splitter, it uses two High Speed UART strings Mouth is separately connected uplink coding circuit 402 and upper row decoding circuit 404 and downlink coding circuit 406 and lower row decoding circuit 408, the serial ports of the acquisition equipment of this instrument pipe nipple is connected using a High Speed Serial.It can receive the data on any serial ports And byte-by-byte transparent forwarding is carried out according to system communication rule.

Fig. 5 single-core cable 1 is fixed together by external conical sleeve 4 and inner conical drogue 6, by decomposing screwed ring 5 and fitting body 8 Connection is decomposed screwed ring 5 and is tensed by pressure ring 3, and wire bushing 2 is screwed in the tail portion of pressure ring 3, prevents 1 bending of single-core cable, lock nut 9 Cover in the outer circle of fitting body 8, with and tight ring 7 it is fixed, 11 sets of screwed ring require rotation flexibly without clamping stagnation on sealed body 10, By being threadedly coupled, switching sealing-plug 13 is threadedly secured on sealed body 10 for sealed body 10 and fitting body 8, with itself O-ring sealing, one end are connected with 1 cable core of single-core cable, and the other end is connected with the contact pin of junior's instrument, and bus circuit plate 14 is circle Shape is fixed on the mounting platform of sealed body 10 with screw 15, and helmet 16 is device fitting, usually protects screwed ring 10 and close Cover, device should take in working condition helmet 16, and Hmp grease is filled inside fitting body 8 and balances inside and outside well pressure, guarantees single The insulation of 1 cable core of cable.

The above is only the preferred embodiment of the utility model, it is noted that for the general of the art For logical technical staff, without departing from the principle of this utility model, several improvement can also be made, these improvement are also answered It is considered as the protection scope of the utility model.

Claims (6)

1. a kind of single-core cable relay transmission device, it is characterised in that including sealing structural component and bus circuit plate (14), Described in sealing structural component include again single-core cable (1), wire bushing (2), pressure ring (3), external conical sleeve (4), decompose screwed ring (5), inner conical drogue (6) and tight ring (7), fitting body (8), lock nut (9), sealed body (10), screwed ring (11), O-ring seal (12), switching sealing-plug (13), screw (15), helmet (16), the single-core cable (1) pass through external conical sleeve (4) and inner conical drogue (6) It is fixed together, is connect by decomposing screwed ring (5) with fitting body (8), the decomposition screwed ring (5) tenses by pressure ring (3), institute The tail portion that wire bushing (2) is screwed in pressure ring (3) is stated, the lock nut (9) covers in the outer circle of fitting body (8), solid with simultaneously tight ring (7) Fixed, the screwed ring (11) covers on sealed body (10), the sealed body (10) with fitting body (8) by being threadedly coupled, institute It states switching sealing-plug (13) to be threadedly secured on sealed body (10), be sealed by the O-ring of itself, one end and single electricity Cable (1) cable core is connected, and the other end is connected with the contact pin of junior's instrument, and the bus circuit plate (14) is fixed on close with screw (15) It seals on the mounting platform of main body (10), the helmet (16) is device fitting, and the bus circuit plate (14) mentions for downstream site For DC power supply, and have the pulse encoding and decoding communication function of single bus, it is further characterized in that, the bus circuit plate (14) Bus splitter both may be implemented DC power supply relaying and also may be implemented uplink single bus pulse encoding and decoding communication function The pulse encoding and decoding communication function of energy and downlink single bus.

2. a kind of single-core cable relay transmission device according to claim 1, it is characterised in that the bus circuit plate It (14) is circle, there is switching sealing-plug resigning breach at edge, is fixed by screws on the mounting platform of sealed body (10).

3. a kind of single-core cable relay transmission device according to claim 1, it is characterised in that the screwed ring (11) is Turn round figure modelling, there is screw thread in outside, and inner hole is unthreaded hole, is manufactured using bronze or beryllium copper, cover the outside of sealed body (10) simultaneously Flexible rotating is without clamping stagnation.

4. a kind of single-core cable relay transmission device according to claim 1, it is characterised in that the bus circuit plate (14) the local received order in direction can be by single Bus repeater to the local interface of the bus splitter of all following stages Transmitting terminal, and the measurement data of this instrument pipe nipple that receives of the local interface of the bus splitter of all following stages is also all The transmitting terminal in the local direction of bus circuit plate can be transmitted in such a way that relay step by step uploads.

5. a kind of single-core cable relay transmission device according to claim 1, it is characterised in that by bus splitter Isolation inductance and coupled capacitor, whole single-core cable is electrically segmented.

6. a kind of single-core cable relay transmission device according to claim 1, it is characterised in that by coding circuit, send Driving circuit, decoding circuit receive the units such as driving circuit, realize the bipolarity return-to-zero pulse coding mode in single bus Communication.