CN108553785A

CN108553785A - Break-make type explosion early warning detection cable and detector

Info

Publication number: CN108553785A
Application number: CN201711293546.0A
Authority: CN
Inventors: 张卫社
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-12-08
Filing date: 2017-12-08
Publication date: 2018-09-21
Anticipated expiration: 2037-12-08
Also published as: CN108553785B

Abstract

A kind of break-make type explosion early warning detection cable and detector.It is made in metal or the radio frequency silk upper edge detection multiple eccentric gaps of cable base material length direction setting as detection cable base material, break-make type explosion early warning detection cable is divided into the more piece detection cable for saving a length of L, one or more eccentric gaps are set in often section detection cable, so that the cross-sectional area on break-make type explosion detection cable at eccentric gap is less than the original cross-sectional area of the detection cable base material before eccentric gap is not arranged at eccentric gap position.Detector includes break-make type explosion early warning detection cable and monitor box.Break-make type explosion early warning detection cable and detector provided by the invention have the following advantages that：Warning sensitivity higher, warning sensitivity caused by manufacture selection is easy and the scope of application is vast, environment temperature increases and long-term work decline less.

Description

Break-make type explosion early warning detection cable and detector

Technical field

The invention belongs to technical field of fire safety, more particularly to a kind of break-make type explosion early warning detection cable and detection Device.

Background technology

In fire-fighting domain, explosion early warning detection detector is a kind of for preventing pressure vessel or pressure pipeline from bursting Important prior-warning device, it is made of two parts, as shown in Figure 1, i.e. by (the also referred to as line style deflection of explosion early warning detection cable 2 Sensing element or deflection detect cable) and the composition of monitor box 1 that be electrically connected with 2 both ends of explosion early warning detection cable.

Usually explosion early warning detection cable 2 is fixed on the outer wall of pressure vessel or pressure pipeline, is happened at pressure appearance Small stretching plastic deformation on device or pressure pipeline can transmit to explosion early warning detection cable 2 in time, make explosion early warning detection Cable 2 also occurs to stretch Light deformation, and the monitor box 1 for being connected to 2 both ends of explosion early warning detection cable can the early warning of detection explosion in real time Detect the micro-stretching deflection of cable 2.When the deflection reaches setting value, report will be alarmed or sent out to monitor box 1 Alert signal, to remind the relevant personnel to take timely measure.Thus the pressure vessel or pressure pipeline is prevented further to be broken And explosion.

A kind of fire-fighting pressure cylinder is disclosed in Chinese invention patent the 200710150126.7th, core is just mounted in The explosion early warning detection cable and detector on pressure cylinder surface.The various types of explosion early warning announced in that patent In detector, it is break-make type explosion early warning detection device to have a kind of, and feature is that explosion early warning detection cable is conductive filament, conductive The plasticity of silk is relatively low (low elongation elongation percentage), and monitor box detects the on off operating mode of explosion early warning detection cable at any time, is happened at pressure The local plastic stretcher strain of strength bottle outer wall can cause explosion early warning detection cable to be broken prior to the explosion of pressure cylinder, supervise It surveys after box detects explosion early warning detection cord loop disconnection and alarms immediately.This break-make type explosion early warning detection cable and Detector have it is simple in structure, at low cost, high reliability has been widely used at present.But this pre- police-spy of explosion That there are still warning sensitivities is low for survey line cable and detector, manufacture selection is difficult therefore the scope of application is small, use environment temperature increases The shortcomings of warning sensitivity reduces, long-term work warning sensitivity reduces (i.e. stability is low).

Invention content

To solve the above-mentioned problems, the purpose of the present invention is to provide a kind of break-make type explosion early warning detection cable and detections Device.

In order to achieve the above object, break-make type provided by the invention bursts early warning detection cable in a manner of straight line or spiral Be laid in protected pressure vessel or pressure pipeline outside wall surface, be as detection cable base material metal or nonmetallic lead Electrical filament upper edge detection cable base material length direction is arranged multiple eccentric gaps and is made, and break-make type explosion early warning detection cable is divided into The more piece detection cable of a length of L is saved, one or more eccentric gaps are set in often section detection cable, so that the explosion detection of break-make type Cross-sectional area on cable at eccentric gap is less than the detection cable base material before eccentric gap is not arranged at eccentric gap position Original cross-sectional area.

Setting eccentric point is pre- in the explosion of break-make type in often section detection cable on the break-make type explosion early warning detection cable Two eccentric gaps of the perpendicular relationship of police-spy's survey line cable circumferencial direction.

N eccentric gap 3 is set in often section detection cable on the break-make type explosion early warning detection cable, wherein n is big In the corresponding n eccentric point of equal to 3, n eccentric gap and each eccentric point using original centre of form O as in the n of symmetrical centre Heart symmetric points amount to 2n point and are uniformly distributed in break-make type explosion early warning detection cable circumferencial direction.

Setting eccentric point is pre- in the explosion of break-make type in often section detection cable on the break-make type explosion early warning detection cable Police-spy's survey line cable circumferencial direction is in a pair of of eccentric gap of pairing relationship.

Setting eccentric point is pre- in the explosion of break-make type in often section detection cable on the break-make type explosion early warning detection cable Two pairs of eccentric gaps of the perpendicular relationship of police-spy's survey line cable circumferencial direction, two eccentric gaps in each pair of eccentric gap are in pairing Relationship.

Setting eccentric point is pre- in the explosion of break-make type in often section detection cable on the break-make type explosion early warning detection cable The equally distributed 2n eccentric gap of police-spy's survey line cable circumferencial direction, wherein n are more than or equal to 3.

When the detection cable base material uses metallic conduction silk, on break-make type explosion early warning detection cable at eccentric gap Notch area ratio A1/A0 be less than or equal to yield tensile ratio σ S/ σ b, be more than 0.01, wherein A1 be break-make type burst early warning detection cable Smallest cross-section area at upper eccentric gap, A0 are the detection line not being arranged before eccentric gap corresponding with minimum cross-section position The original cross-sectional area of cable base material, σ S, σ b are respectively the yield strength and tensile strength for detecting cable base material.

The long L of section of the break-make type explosion early warning detection cable is less than 6 δ and is more than 0.02 δ, and wherein δ is protected pressure The wall thickness of force container or pressure pipeline.

The elongation percentage of the detection cable base material is more than 1.2%, is less than 100%.

Detector provided by the invention using break-make type explosion early warning detection cable includes break-make type explosion early warning detection Cable and the monitor box being electrically connected with break-make type explosion early warning detection cable both ends.

The detector of break-make type explosion early warning detection cable provided by the invention includes break-make type explosion early warning detection cable With the monitor box being electrically connected with break-make type explosion early warning detection cable both ends.

Break-make type explosion early warning detection cable and detector provided by the invention have the following advantages that：

Warning sensitivity higher, manufacture selection are easy and the scope of application is vast, environment temperature increases and long-term work causes Warning sensitivity decline it is less.

Description of the drawings

Fig. 1 is a kind of explosion early warning detection device structural schematic diagram of prior art.

Fig. 2 is break-make type provided by the invention explosion early warning detection cable and panel detector structure schematic diagram.

Fig. 3 be break-make type provided by the invention burst early warning detection cable on gap structure schematic diagram, wherein Fig. 3 (a) and Burst early warning detection cable longitudinal direction section view and sectional view along A-A when Fig. 3 (a) ' is respectively trapeze cut；Fig. 3 (b) and Fig. 3 (b) ' Respectively rectangular notch when explosion early warning detection cable longitudinal direction section view and sectional view along A-A；Fig. 3 (c) and Fig. 3 (c) ' is respectively V Burst early warning detection cable longitudinal direction section view and sectional view along A-A when type notch；When Fig. 3 (d) and Fig. 3 (d) ' are respectively U-shaped notch The early warning detection cable longitudinal direction section view that bursts and sectional view along A-A.

Fig. 4 is bilateral gap structure schematic diagram on break-make type provided by the invention explosion early warning detection cable, wherein Fig. 4 (a) explosion early warning detection cable longitudinal direction section view and sectional view along A-A when and Fig. 4 (b) is respectively bilateral notch.

Fig. 5 is notch structural schematic diagram when different circumferential on break-make type provided by the invention explosion early warning detection cable, Wherein Fig. 5 (a) bursts early warning detection cable forward direction figure, and Fig. 5 (b), Fig. 5 (c) and Fig. 5 (d) are respectively Fig. 5 (a) A-A to, B-B To, C-C to sectional view.

Fig. 6 is to save long schematic diagram on break-make type provided by the invention explosion early warning detection cable.

Fig. 7 is notch spacing schematic diagram on break-make type provided by the invention explosion early warning detection cable.

Fig. 8 (b) and Fig. 8 (a) is respectively non-eccentricity indentation, there minimum cross-section on break-make type explosion early warning detection cable The structural schematic diagram when centre of form of the original cross-sectional of the detection cable base material of the centre of form and smallest cross-sectional position overlaps；8 (d) and Fig. 8 (c) figure is respectively the centre of form of minimum cross-section and most at eccentric gap on break-make type provided by the invention explosion early warning detection cable The structural schematic diagram when centre of form of the original cross-sectional of the detection cable base material of small bore position is misaligned.

Fig. 9 is eccentric gap form schematic diagram on break-make type provided by the invention explosion early warning detection cable, wherein Fig. 9 (a) explosion early warning detection cable front view and sectional view along A-A when and Fig. 9 (a) ' is respectively transverse incision；Fig. 9 (b) and Fig. 9 (b) ' explosion early warning detection cable front view and sectional view along A-A when being respectively longitudinal cut；Fig. 9 (c) and Fig. 9 (c) ' is respectively Burst early warning detection cable front view and sectional view along A-A when oblique line notch；When Fig. 9 (d) and Fig. 9 (d) ' are respectively cylindrical hole Burst early warning detection cable front view and sectional view along A-A.

Figure 10 is cylinder of the break-make type provided by the invention explosion early warning detection cable in pressure pipeline or pressure vessel The stationary state schematic diagram of outer wall.Wherein Figure 10 (a), Figure 10 (a) ' be respectively the stationary state that is located at below Oy axis of eccentric point just View and sectional view along A-A；Figure 10 (b), Figure 10 (b) ' be respectively the stationary state front view that is located above Oy axis of eccentric point and Sectional view along A-A.

Figure 11 is that the section that break-make type provided by the invention bursts on early warning detection cable detects the interior setting two of cable partially When heart notch, distribution schematic diagram of the corresponding eccentric point in the detection perpendicular relationship of cable circumferencial direction.

Figure 12 is that the section that break-make type provided by the invention bursts on early warning detection cable detects the interior setting two of cable partially When heart notch, decision principle schematic diagram of the corresponding eccentric point in the detection perpendicular relationship of cable circumferencial direction.

Figure 13 is that three bias are arranged in a section detection cable on break-make type provided by the invention explosion early warning detection cable When notch, the central symmetry point of corresponding eccentric point and eccentric point is in the detection equally distributed schematic diagram of cable circumferencial direction.

It is in match that Figure 14, which is that setting is a pair of in a section detection cable on break-make type provided by the invention explosion early warning detection cable, To the eccentric points of two eccentric gaps of relationship detection cable circumferencial direction distribution schematic diagram.

It is in match that Figure 15, which is that setting is a pair of in a section detection cable on break-make type provided by the invention explosion early warning detection cable, The decision principle schematic diagram that cable circumferencial direction is in pairing relationship is being detected to the eccentric point of two eccentric gaps of relationship.

Figure 16 is to be arranged two pairs in vertical in a section detection cable on break-make type provided by the invention explosion early warning detection cable Distribution schematic diagram of the eccentric point of the pairing eccentric gap of straight relationship in detection cable circumferencial direction.

Figure 17 (a) and 17 (b) are to be set in a section detection cable on break-make type provided by the invention explosion early warning detection cable Set distribution schematic diagram of the pairing eccentric gap in detection length of cable direction of two pairs of perpendicular relationships.

Figure 18 is in match for three pairs of setting in a section detection cable on break-make type provided by the invention explosion early warning detection cable The equally distributed schematic diagram of cable circumferencial direction is being detected to the eccentric point of six eccentric gaps of relationship.

Figure 19 (a), 19 (b), 19 (c) are a section detection cable on break-make type provided by the invention explosion early warning detection cable Distribution schematic diagram of six eccentric gaps of three pairs of the middle setting in pairing relationship in detection length of cable direction.

Specific implementation mode

In the following with reference to the drawings and specific embodiments to break-make type provided by the invention explosion early warning detection cable and detector It is described in detail.Component identical with prior art uses identical drawing reference numeral, and omits the detailed description carried out to it.

Embodiment one

As shown in Fig. 2, break-make type provided by the invention explosion early warning detection cable 4 is laid in protected pressure vessel or It is in the metal or radio frequency silk upper edge detection cable base material length as detection cable base material in pressure pipeline outside wall surface Direction is arranged multiple eccentric gaps 3 and is made, and break-make type explosion early warning detection cable 4 is divided into the more piece detection cable for saving a length of L, One or more eccentric gaps 3 are set in often section detection cable, so that on break-make type explosion detection cable 4 at eccentric gap 3 Cross-sectional area is less than the original cross-sectional area of the detection cable base material before eccentric gap 3 is not arranged at 3 position of eccentric gap.It is so-called Cable base material is detected, refers to that the detection cable before setting eccentric gap 3, so-called original cross-sectional area refer to detection line The cross-sectional area of cable base material.

The break-make type explosion early warning detection cable 4 is consolidated by coatings or insulating cement in the way of straight line or spiral Determine or be laid in protected pressure vessel or pressure pipeline outside wall surface, make break-make type explosion early warning detection cable 4 and is protected The outside wall surface of shield object insulate and bonds together.So-called insulation refers to opposing insulation, and the reduction degree of insulation resistance is with not shadow It is principle to ring to the accurate judgement of 4 on off operating mode of break-make type explosion early warning detection cable.So-called insulation can pass through break-make type Setting coatings layer or insulation glue-line are realized between explosion early warning detection cable 4 and the outer wall of protected object, can also Insulating layer is set between break-make type explosion early warning detection cable 4 and protected object outer wall, the two sides of insulating layer respectively with it is logical Disconnected type explosion early warning detection cable 4 and protected object outer wall are bonded.

Including prismatic round, ellipse, square or rectangular is in the cross section of the detection cable base material Regular shape or irregular shape.For the detection cable base material of non-circular cross sections, it is contemplated that a circular cross section, cross section Product is equal with the cross-sectional area of actual detection cable base material, then the former diameter of (circular cross section imagined) is known as the latter Equivalent diameter, usually select detection cable base material equivalent diameter d be 0.01~2mm.

In addition, the detection cable base material can also use cross section for the ring line of non-constant section, in the case, Making and the effect of eccentric gap 3 are not influenced.

For detecting cable base material circular in cross-section, eccentric gap 3 be detection cable base material periphery on to Sunken inside is formed, cross-sectional shape as shown in figure 3, but be not limited to the shape of Fig. 3, the depth of eccentric gap 3 is H, and bias lacks The width of mouthful 3 openings is S, cross section can use trapezoidal, rectangle, V-type, it is U-shaped including regular shape, can also use not Regular shape.In addition, eccentric gap 3 can be formed in unilateral, bilateral or more sides in the circumferential direction of detection cable base material, such as Fig. 4 institutes Show.In the circumferential direction of detection cable base material, the direction of adjacent eccentric notch 3 may be the same or different, as shown in Figure 5.It is logical Often, the early warning detection cable 4 that break-make type can be burst regard as by one section, one section, one section ... of multistage detection cable connection and At the one section of detection cable that will meet centainly setting rule is known as section detection cable, will include one or more in the application One section of detection cable of eccentric gap 3 is known as section detection cable, and the length which detects cable is known as saving length, between section and section Separation can be between two eccentric gaps 3 (adjacent or non-adjacent) corresponding points (such as starting point of eccentric gap 3, or Midpoint between the terminal or eccentric gap 3 of eccentric gap 3), can also be the other points for meeting certain setting rule.Break-make Respectively the long L of section of section detection cable can be that constant pitch is long on type explosion early warning detection cable 4, can also be traitorous length, long with constant pitch Setting is preferred, as shown in Fig. 2, when traitorous long setting, respectively section detects the section length point of cable on break-make type explosion early warning detection cable 4 Not Wei L1, L2, L3 ..., these save long L and are not completely equivalent, as shown in fig. 6, multiple eccentric gaps 3 can also may be used with spaced set To become spacing setting.When becoming spacing setting, the spacing between adjacent eccentric notch 3 is m, these spacing are not completely equivalent, usually Spacing m chooses between 0.2~20mm.Under the premise of ensureing processing quality, the width S of 3 opening of eccentric gap is smaller more It is good, usually chosen between 0.0001~0.8mm.In addition, 3 opening width S of each eccentric gap, depth H, shape, circumferential direction The formal parameters such as direction may be the same or different, and is preferred with identical.When the width of two 3 openings of adjacent eccentric notch Respectively S1, S2 when, the spacing m between two eccentric gaps 3 is preferably greater than (S1+S2)/2, as shown in Figure 7.Certain two bias Spacing m between notch 3 might be less that (S1+S2)/2, not influence the sensitivity of this break-make type explosion early warning detection cable 4 Premised on.In addition, eccentric gap 3 can also be formed to open interior on the periphery of detection cable base material, such as Fig. 9 (d) institutes Show.

Corresponding partial cross sectional or all transversal at eccentric gap 3 on the break-make type explosion early warning detection cable 4 Face have minimum cross-section, smallest cross-section area A1, it is corresponding with minimum cross-section position eccentric gap 3 is not set before detect The area of the original cross-sectional of cable base material is A0, A1/A0 is known as notch area ratio, notch area ratio is that influence break-make type is quick-fried One of the most important parameters for splitting 4 warning sensitivity of early warning detection cable, usually choose between 0.01~0.9.Eccentric gap 3 Depth H directly affects notch area ratio, value depend on pre-set notch area than numerical value.

Notch is generally divided into eccentric gap and non-eccentricity notch, in notch area than identical, the explosion of break-make type The elongation percentage of early warning detection cable 4 is also roughly the same, but when the cross-sectional shape difference of notch, still results in the explosion of break-make type Early warning detection cable 4 has different warning sensitivities.Experiment shows that indentation, there is most on break-make type explosion early warning detection cable 4 The position of form center of small cross section is also one of the important parameter of warning sensitivity for influencing break-make type explosion early warning detection cable 4. Identical notch area ratio, at minimum cross-section, the centre of form b of minimum cross-section, with original cross before notch is not arranged at this When the original centre of form O in section is overlapped, as shown in Fig. 8 (a), 8 (b), warning sensitivity is low, and notch at this moment is exactly that non-eccentricity lacks Mouthful；The centre of form b of indentation, there minimum cross-section is not weighed with the original centre of form O of original cross-sectional before eccentric gap is not arranged at this When conjunction, as shown in Fig. 8 (c), 8 (d), warning sensitivity is high, and notch at this moment is exactly eccentric gap 3；The original cross of eccentric gap (also referred to as eccentricity, usual value exist the distance between the original centre of form O in section and the centre of form b of eccentric gap minimum cross-section f Between 0.02d~4d, d is the equivalent diameter for detecting cable base material) it is bigger, warning sensitivity is higher.Studies have shown that minimum transversal The centre of form b in face, when being overlapped with the original centre of form O of original cross-sectional at this, break-make type explosion early warning detection cable 4 is being experienced From the micro-plastic deformation amount of pressure vessel or pressure pipeline when, rely primarily on stretching and be broken；The centre of form b of minimum cross-section, with When original centre of form O of original cross-sectional is misaligned at this (minimum cross-section at this moment is also referred to as eccentric cross section), the explosion of break-make type Early warning detection cable 4 is when experiencing the micro-plastic deformation amount from pressure vessel or pressure pipeline, in addition to breaking by stretching Outside splitting, it also occur that flexural deformation, to accelerate fracture process, therefore warning sensitivity improves.Aforementioned conclusion is not only suitable for The situation that cable base material cross section is round is detected, it is non-circular situation to be also applied for cross section.

Eccentric gap 3 can use electric spark engraving, grinding tool polishing, laser marking or laser engraving, roller turner, roll Mode including compacting, topical agent corrosion is formed, experiments have shown that, laser marking or laser engraving mode will not be in eccentric gaps Apparent stress concentration point is left on the material of 3 roots, the pre- police-spy of high, at low cost and break-make type explosion with manufacture efficiency Survey line cable 4 specific elongation steadily (to ensure break-make type explosion early warning detection device performance stablize), it is corrosion-resistant the advantages that, be best Processing method.In addition, in the way of laser marking or laser engraving when eccentric gap 3 is arranged on detecting cable base material, partially Heart notch 3 can be transverse incision, longitudinal cut, oblique line notch, cylindrical hole or blind hole, as shown in Figure 9.

Compared with tradition explosion early warning detection cable 2, break-make type explosion early warning detection cable 4 has the following advantages that：

1) elongation percentage of break-make type explosion early warning detection cable 4 is less than the elongation percentage of tradition explosion early warning detection cable 2, and Elongation percentage is to influence the explosion most important index of early warning detection device sensitivity, and explosion early warning detection line can be improved by reducing elongation percentage The warning sensitivity of cable and detector.

2) other than elongation percentage, pull-off force can also influence the warning sensitivity of explosion early warning detection cable.When explosion is pre- It, usually will with coatings or insulating cement when police-spy's survey line cable is mounted on the outside wall surface of protected pressure vessel or pressure pipeline The outer wall secure bond of explosion early warning detection cable and pressure vessel or pressure pipeline, is happened at pressure vessel or pressure pipe in this way The micro-plastic deformation amount of pipeline outer wall can be transmitted in time on explosion early warning detection cable, and explosion early warning detection cable is made to draw It is long.But the Light deformation amount of pressure vessel or pressure pipeline outer wall cannot 100% all be transmitted to explosion early warning detection cable On, that is, there are certain deflection slippages, loss is bigger, and the sensitivity for the early warning detection cable that bursts is lower.Burst early warning The pull-off force for detecting cable is bigger, and the slippages of this Light deformation amount are bigger.Environment temperature increases, hard due to coatings Degree and intensity decline, slippages bigger.The pull-off force of break-make type explosion early warning detection cable 4 is less than tradition explosion early warning detection The pull-off force of cable 2, so as to so that the sensitivity of explosion early warning detection cable improves.

3) the explosion early warning detection cable of most conductive matter, as temperature increases, elongation percentage will increase, phase The warning sensitivity for the explosion early warning detection cable answered can decline, and usually protected object (pressure vessel or pressure pipeline) exists Bursting accident probability of happening bigger under hot environment, so as to cause the pressure vessel or pressure of explosion early warning detection cable is equipped with Safety coefficient reduces pipeline in a high temperauture environment.Compared with tradition explosion early warning detection cable 2, the early warning although break-make type bursts The elongation percentage of detection cable 4 increased also with the increase of temperature, but increased amplitude will be significantly less than it and detect cable mother The increased amplitude of material elongation percentage, that is to say, that break-make type explosion early warning detection cable 4 has higher alarm in hot environment Sensitivity.

4) it is that explosion early warning detection cable is enable to reach required warning sensitivity, tradition explosion early warning detection cable 2 Usually select elongation percentage is relatively low (to be less than or equal to 1.2% and be more than or equal to 0.1%, elongation percentage is less than 0.1% and is very easy to wrong report It is alert) conductive filament make, otherwise warning sensitivity is very low or cannot alarm.By material character and the shadow of drawing processing technology It ringing, alternative elongation percentage is smaller less than the range of 1.2% conductive filament, some are not resistant to the corrosion of particular job medium, Some are not resistant to required high-temperature work environment, that is, 2 selection of early warning detection cable that bursts is difficult, therefore the scope of application is small. It detects and eccentric gap 3 is set on cable base material, can easily produce difference by processing the eccentric gap 3 of different depth Elongation percentage and the break-make type of different sensitivity explosion early warning detection cable 4.Under normal circumstances, break-make type explosion early warning detection cable 4 also select the detection cable base material that elongation percentage is less than or equal to 1.2%.In order to meet particular job environment such as corrosion-and high-temp-resistant, Even if the elongation percentage for the detection cable base material chosen was more than for 1.2% (being less than 100%), it may be made as comprehensive elongation percentage and be less than 1.2% break-make type explosion early warning detection cable 4, so as to produce comprehensive performance preferably adapt to various environment temperatures, Explosion early warning detection cable under various corrosive mediums and detector, it is seen then that break-make type explosion early warning detection provided by the invention Cable has the advantages that selection is easy and applied widely.

5) elongation percentage of generally conventional explosion early warning detection cable 2 cannot be sufficiently low, to meet wanting for practical engineering application It asks.Chinese invention patent number discloses a kind of to the early warning detection cable setting pre-tensioning that bursts in being 200910229175.9 Method, to improve the warning sensitivity of explosion early warning detection cable.Current this method has been generally used.Usually it is bonded in There is insulation between explosion early warning detection cable on pressure vessel or pressure pipeline and pressure vessel or pressure pipeline outer wall to apply Material or insulating cement, explosion early warning detection cable is chronically at tensional state, with the extension of time, coatings or insulating cement meeting Permanent deformation is generated, keeps explosion early warning detection cable loose, i.e., tension reduces, so that explosion early warning detection cable is sensitive Degree declines with the increase of use time, that is to say, that long-term working stability is low.And break-make type explosion early warning detection cable 4 do not need pre-tensioning or only need the pre-tensioning of very little, therefore long-term working stability is high.

When the break-make type explosion early warning detection cable 4 is using metallic conduction silk, notch area ratio A1/A0 (wherein A1 For the smallest cross-section area at eccentric gap 3 on break-make type explosion early warning detection cable 4, A0 is corresponding with minimum cross-section position The original cross-sectional area that cable base material is detected before eccentric gap 3 is not set) excessive (be more than the in the wrong strong of detection cable base material itself Than σ S/ σ b, wherein σ S, σ b are respectively the yield strength and tensile strength for detecting cable base material), then break-make type bursts early warning detection The position of eccentric gap 3 is not set on cable 4, during the stretching before breaking alarm is elongated, can be plastically deformed yet, In plastic deformation, linear relationship is no longer belong between drawing force and elongation, small pulling force increase can lead to prodigious prolong It stretches, the minor change of 3 depth of such eccentric gap (i.e. notch area than minor change) will make break-make type burst pre- police-spy The mismachining tolerance that the elongation percentage variation of survey line cable 4 is inevitably present very greatly, in process 3 depth of eccentric gap can cause Break-make type bursts 4 elongation percentage of early warning detection cable along its length unstable, and cable alarm is detected so as to cause its preceding paragraph Excessively sensitive or even generation false alarm, another section of detection cable alarm sensitivity is too low, to be delayed alarm opportunity.In addition, examination It tests and shows notch area than too small (be less than 0.01), the unstable and processing microdefect of the distortional stress at 3 root of eccentric gap Increase, can equally influence break-make type explosion early warning detection cable 4 in the stability of the elongation percentage of length direction (although notch face Product is more different than the excessive reason for causing elongation percentage unstable from notch area than the too small reason for causing elongation percentage unstable).When When detecting cable base material using metallic conduction silk, notch area ratio A1/A0 should be less than being equal to yield tensile ratio σ S/ σ b, be more than 0.01, In this case, break-make type bursts early warning detection cable 4 in stretcher strain, and the deformation near eccentric gap 3 is mainly plasticity Deformation, the deformation far from eccentric gap 3 is mainly rigid deformation, and synthesis elongation percentage is to notch area than insensitive.

In order to realize the warning function of break-make type explosion early warning detection cable 4, break-make type explosion early warning detection line Cable 4 will be fixed in the outside wall surface of protected pressure vessel or pressure pipeline.The wall thickness δ of pressure vessel or pressure pipeline Also the warning sensitivity of break-make type explosion early warning detection cable 4 can be influenced.The long L mistakes of section of break-make type explosion early warning detection cable 4 It is big or it is too small can all cause break-make type explosion early warning detection 4 warning sensitivities of cable it is too low, cause to fail to report police.It is excessive to save long L, meeting It causes stress container or the position of crackle occurs for pressure pipeline internal random and bias on break-make type explosion early warning detection cable 4 lacks The distance at 3 positions of mouth is excessive, to make break-make type explosion early warning detection cable 4 be not easy to be pulled off, alarm is as a result caused to be delayed；Section Long L is too small, can cause 3 quantity mistake of eccentric gap corresponding with pressure vessel or pressure pipeline internal random generation crack site It is more, and the deformation at eccentric gap 3 makes the break-make type explosion early warning detection cable 4 of part near crackle based on being plastically deformed Amount of plastic deformation increase, break-make type explosion early warning detection cable 4 is not easy to be pulled off, and also results in presignal delay.Experiment shows The long L of section of break-make type explosion early warning detection cable 4 should be less than 6 δ and be more than 0.02 δ.

In addition, break-make type explosion early warning detection cable 4 provided by the invention is except for pressure vessel and pressure pipeline (metal Or non-metallic material) outside, it can also be used to fiber winds the inner bladder outer wall of composite cylinder and pressure vessel of different shapes, such as Lpg spherical tank, oval cross section oil gas tank etc., the specific system of laying of break-make type explosion early warning detection cable 4 is according to pressure vessel Stress and failure mode determine.Break-make type explosion early warning detection cable 4 can also be fixed on the steel constructions such as bridge, skyscraper On the outer wall of part, the monitoring and warning of the failure accidents for steel construction piece.

Embodiment two

Break-make type explosion early warning detection cable 4 is only fixed on protected object and (is often referred to pressure pipeline or pressure is held Device) outer surface when could complete its burst warning function.Experiments have shown that when break-make type explosion early warning detection cable 4 is fixed on When on the outer surface of protected object, the eccentric point of minimum cross-section is secured relative to the vertical line side on surface at eccentric gap 3 To having a significant impact to the sensitivity of break-make type explosion early warning detection cable 4.Below with break-make type explosion early warning detection cable 4 It is illustrated for being fixed on cylindrical outer wall.

Break-make type explosion early warning detection cable 4 is by certain spacing k, helixangleβ (spacing k between 20~200mm Choose, helixangleβ is generally chosen between 0~90 °), it is solid with the bonding insulating layer formed after coatings or insulation adhesive curing It is scheduled on the cylindrical outer wall 5 of pressure pipeline or pressure vessel that thickness is δ, such as Figure 10 (a), Figure 10 (a) ', Figure 10 (b), figure Shown in 10 (b) '.Figure 10 (a), Figure 10 (a) ' indicate eccentric point b₁Below Oy axis, Figure 10 (b), Figure 10 (b) ' indicate eccentric point b₁ Above Oy axis.Minimum cross-section (also referred to as eccentric cross section B1) on break-make type explosion early warning detection cable 4 at eccentric gap 3 On the sectional view at place, GC is bonding insulating layer, w₁To burst protected object that early warning detection cable 4 is in contact with break-make type Outer section line, w₂For the interior profile line of protected object, point P is by original centre of form O on break-make type explosion early warning detection cable 4 (centre of form of detection cable base material) and outer section line w₁The intersection point of vertical line OP (OP is also the protected object at eccentric cross section The vertical line of outside wall surface), using original centre of form O as pole, using the ray Ox by P points as polar axis (or positive axis of rectangular coordinate system) Polar coordinate system is set, Oy axis is the vertical line of polar axis Ox.b₁For the centre of form of eccentric cross section B1, i.e. eccentric point.Experiments have shown that straight line O b₁Angle α (not considering direction of rotation, consider by positive angle acute angle) between polar axis Ox, to break-make type explosion early warning detection line The sensitivity influence of cable 4 is very big, angle α is called the established angle of eccentric gap 3.At identical eccentricity f, straight line Ob₁With Angle α (acute angle) between polar axis Ox is smaller, eccentric point b₁Closer to the directions polar axis Ox (more deviateing Oy axis directions in other words), lead to Disconnected type explosion early warning detection cable 4 is more easily broken off, and the sensitivity of break-make type explosion early warning detection device 4 is higher.That is, Under identical eccentricity f, straight line Ob₁Angle α between polar axis Ox is closer to 90 °, eccentric point b₁Further away from polar axis Ox (or Say closer to Oy axis), break-make type explosion early warning detection cable 4 is less susceptible to be broken, and break-make type bursts the sensitive of early warning detection device 4 Degree is lower.Under normal conditions, being less than or equal to 60 ° with angle α is advisable.No matter eccentric point b₁Above or below Oy axis, on Conclusion is stated to set up.Eccentric point b₁Circumferential position why can significantly affect the alarm of break-make type explosion early warning detection cable 4 The reason of sensitivity, is：Protected object is in the drawing process before explosion, and other than there are lengthening deformation, there is also curved Song deformation.On the one hand break-make type explosion early warning detection cable 4 experiences the stretcher strain from protected object, this stretcher strain So that break-make type explosion early warning detection cable 4 itself is occurred, stretching is outer also to bend, so warning sensitivity is higher；It is another Aspect, break-make type burst the eccentric point b of 3 eccentric cross section B1 of eccentric gap on early warning detection cable 4₁Closer to the directions polar axis Ox, Break-make type explosion early warning detection cable 4 can experience the more flexural deformation from protected object, and this flexural deformation adds The acute bending degree of break-make type explosion early warning detection cable 4, makes it easier to be broken, and therefore, break-make type bursts early warning detection The sensitivity of cable 4 further increases.

If an eccentric gap 3 is only arranged in a section detection cable, break-make type explosion early warning detection cable 4 to be made to have There is higher sensitivity, when laying break-make type explosion early warning detection cable 4 on protected object, it is necessary to try to make above-mentioned inclined The established angle of heart notch 3 is less than or equal to 60 °.But there is initial turn round in the explosion early warning detection of the break-make type due to processing cable 4 Turn power, inevitably rotated around its axle center in laid processes, it is very low to do so efficiency, also relatively difficult, partially The established angle of heart notch 3 can not also be ensured.Even if not pre-processed eccentric gap 3, using when processing eccentric gap 3 The method for laying break-make type explosion early warning detection cable 4, there is also break-make type explosion early warning detection cables 4 to lay difficulty, installs The suddenly big or suddenly small unstable problem in angle.In order to solve this problem, it setting can burst in break-make type in a section detection cable Two eccentric gaps 3 of the perpendicular relationship of 4 circumferencial direction of early warning detection cable, i.e. eccentric cross section is inclined at two eccentric gaps 3 Heart point is in approximately perpendicular relationship in circumferencial direction, and corresponding eccentric cross section is B1, B2, and corresponding eccentric point is b₁、b₂, eccentric Point b₁、b₂It is located in two sector regions approximately perpendicular on 4 circumferencial direction of break-make type explosion early warning detection cable, it is fan-shaped The arc angle in region is 30 °, as shown in figure 11.

Being described as more precisely of two eccentric gaps 3 of so-called perpendicular relationship：With break-make type explosion early warning detection line The original centre of form O of cable 4 is the pole heart, to pass through the upper two eccentric point b of eccentric cross section B1, B2₁、b₂In any point it is (such as eccentric Point b₁) ray Ox be polar axis, another eccentric point b₂Polar angle or for more than or equal to 60 °, be less than or equal to 120 °；Or it is big In equal to 240 °, it is less than or equal to 300 °, as shown in figure 12, eccentric point b₂Polar angle closer to 90 ° or 270 °, two eccentric gaps 3 verticality is higher.In this case, regardless of break-make type explosion early warning detection cable 4 in laid processes around its shape The heart (or axle center) rotates, and the bias on break-make type explosion early warning detection cable 4 in a section detection cable at two eccentric gaps 3 is cut The eccentric point b of face B1, B2₁、b₂, there are one eccentric point b always₁Or b₂Established angle be less than or equal to 60 °, to ensure that break-make Type explosion early warning detection cable 4 all has higher warning sensitivity under various mounting conditions.

Two bias of the perpendicular relationship being arranged in often section detection cable on break-make type explosion early warning detection cable 4 lack The formal parameter (opening width, depth, shape, notch area ratio, eccentricity etc.) of mouth 3 and the specific choosing value of spacing are with reference to real Example one is applied, in each section detection cable of break-make type explosion early warning detection cable 4, or along break-make type explosion early warning detection cable In each section detection cable of 4 length directions, the formal parameter of eccentric gap 3 can be identical, can not also be identical, to be all mutually most Good, the eccentric gap 3 of perpendicular relationship can be with spaced set, can not also spaced set.Two perpendicular relationships it is inclined Spacing between heart notch 3 is preferably chosen between 0.1~20mm.

Embodiment three

When the break-make type explosion early warning detection cable 4 for carrying multiple eccentric gaps 3 in every section is laid in protected object When on outer surface, there are one established angles for each eccentric gap 3 therein, and the warning sensitivity of often section detection cable depends on should Minimum value in section detection cable in the established angle of these eccentric gaps 3, i.e., minimum established angle.Along the pre- police-spy of break-make type explosion The length direction of survey line cable 4, the minimum established angle that often section detects in cable will not be identical, i.e. break-make type explosion early warning detection The sensitivity of cable 4 is alongst not exactly the same, i.e. along its length consistent of break-make type explosion early warning detection cable 4 Property is short of.In order to overcome this defect, it is necessary to try to reduce, often section detects cable on break-make type explosion early warning detection cable 4 The numerical value of middle minimum established angle so that the minimum established angle in often section detection cable is no more than some numerical value, this numerical value Referred to as maximum possible established angle, maximum possible established angle is smaller, and the sensitivity of break-make type explosion early warning detection cable 4 is higher, edge The consistency of length direction is better.Embodiment two is exactly specific one of the method for reducing maximum possible established angle, in order to further The maximum possible established angle for reducing break-make type explosion early warning detection cable 4, improves its sensitivity, can be set in every section detects cable It sets in 4 circumferencial direction of break-make type explosion early warning detection cable about a eccentric gap 3 of equally distributed n (n is more than or equal to 3), it is right The eccentric cross section answered is respectively B1, B2 ... Bn, and eccentric point is respectively b₁、b₂... bn, b₁d、b₂D ... bnd (and eccentric point) Respectively using original centre of form O as the eccentric point b of symmetrical centre₁、b₂... the central symmetry point of bn, above-mentioned 2n point will be with original shape Circumference centered on heart O is averagely divided into 2n sector region, and the radian of each sector region is 180/n °, eccentric point b₁、b₂… Bn, central symmetry point b₁d、b₂D ... each points such as bnd, the only distribution one in each sector region.It is above-mentioned each put it is best Where position is distributed across on the bisector of the boundary line of sector region, closer to bisector, break-make type explosion early warning detection line The sensitivity of cable 4 is higher, and consistency is better.An eccentric point is allowed just to be on the line of demarcation of two neighboring sector region, It is considered that the eccentric point belongs to that sector region without other eccentric points in two neighboring sector region.Also permission two is inclined Heart point is just on the line of demarcation of two sector regions, it is believed that two eccentric points are belonging respectively to two adjacent fan sections Domain.Eccentric point b₁、b₂... bn, central symmetry point b₁d、b₂D ... each points such as bnd are in 4 circumference of break-make type explosion early warning detection cable Direction about equally distributed description more precisely is：In eccentric point b₁、b₂... bn, central symmetry point b₁d、b₂D ... in bnd Between any two points, there is a strip area line of demarcation Ox, (area limit line Ox can pass through eccentric point b₁、b₂... bn, center pair Claim point b₁d、b₂D ... any point among bnd can not also pass through；Eccentric point b₁、b₂... bn, central symmetry point b₁d、 b₂D ... allow have polar angle identical point among bnd, when there is polar angle identical point, the area limit line Ox necessary mistakes polar angle is identical Point), O is the original centre of form of explosion early warning detection cable 4, and using area limit line Ox as polar axis, original centre of form O is pole, eccentric Point b₁、b₂... bn, central symmetry point b₁d、b₂D ... the polar angle of a point in bnd is more than or equal to 0 °, is less than or equal to 180/n °； Eccentric point b₁、b₂... bn, central symmetry point b₁d、b₂D ... the polar angle of another eccentric point in bnd is small more than or equal to 180/n ° In equal to 2180/n °；The polar angle of third eccentric point is more than or equal to 2180/n °, is less than or equal to 3180/n °；4th The polar angle ... of eccentric point；The polar angle of n-th eccentric point is more than or equal to 180/n ° of (N-1), is less than or equal to N180/n.Work as n=3 When, the position distribution of aforementioned each eccentric point is as shown in figure 13.It can be observed from fig. 13 that belonging to these eccentric points are all present in 4 circumferencial direction of break-make type explosion early warning detection cable sector region in, and on line of demarcation where can reside in, a certain Also allow that there are two eccentric points on line of demarcation.

It, can be by adjusting bias to ensure that n eccentric gap 3 is about evenly distributed in each sector region above-mentioned 3 process equipment of notch is realized relative to the relatively circumferential orientation of break-make type explosion early warning detection cable 4.For having processed N eccentric gap 3, the line of demarcation of aforementioned sector region can be found out by the method for iteration, and judge these eccentric points Whether the principle that each sector region in is only distributed an eccentric point, i.e., about equally distributed principle are met.So-called iterative method, It is exactly first to mark certain section on break-make type explosion early warning detection cable 4 to detect 3 corresponding eccentric cross section of each eccentric gap in cable Eccentric point and each eccentric point central symmetry point (symmetrical centre is the original centre of form) using original centre of form O as the circumferential position of the pole heart It sets, if there is the point of identical polar angle, then the line of original centre of form O and the point are exactly line of demarcation, using the line as starting point, circle It is divided into 2n sector region week, checking each sector region, whether only there are one eccentric points；It is identical if there is no polar angle Point, then by original centre of form O, between two consecutive points, one ray of first arbitrarily picture (it can be more therethrough, also may be used With all without), using the ray as starting point, circumference equal dividing be 2n sector region, then centered on original centre of form O, The line of demarcation of (including consecutive points) rotation start ray and all sector regions between two consecutive points above-mentioned, until occurring every It is only distributed the situation of an eccentric point in one sector region, then illustrates that these eccentric points meet only distribution one in each sector region The principle of a eccentric point, i.e., about equally distributed principle.If no matter how to rotate aforementioned start ray and sector region point Boundary line cannot occur only being distributed the situation of an eccentric point in each sector region, then illustrate that these eccentric points are unsatisfactory for often The principle of an eccentric point is only distributed in one sector region.

By mentioned above principle, n eccentric gap 3 is set on break-make type explosion early warning detection cable 4 in often section detection cable N eccentric point, no matter how break-make type explosion early warning detection cable 4 reverses in laid processes, is always deposited in section detection cable It is less than or equal to 180/n ° of eccentric gap in an established angle, i.e., break-make type explosion early warning detection cable 4 is along its length most Established angle possible greatly is less than or equal to 180/n °, to ensure that sensitivity and the consistency of break-make type explosion early warning detection device 4.From Theoretically, the quantity for the eccentric point for meeting aforementioned setting principle being arranged on break-make type explosion early warning detection cable 4 above-mentioned More, i.e., n is bigger, and maximum possible established angle is smaller, and the sensitivity higher of break-make type explosion early warning detection cable 4, consistency is more It is good.But excessive setting quantity, processing difficulties, processing charges high efficiency on the one hand can be caused low, on the other hand can cause to send out The minimum cross-section quantity of raw plastic deformation is more, and the local elongation percentage of break-make type explosion early warning detection cable 4 increases, sensitivity Decline instead.It is advisable no more than 5 with n in actual fabrication.It is arranged on 4 often section detection cable of break-make type explosion early warning detection cable N eccentric gap 3 formal parameter (opening width, depth, shape, notch area ratio, eccentricity etc.) and spacing tool Body choosing value is with reference to embodiment one, and in each section detection cable of break-make type explosion early warning detection cable 4 or the explosion of break-make type is pre- In each section detection cable of 4 length direction of police-spy's survey line cable, the formal parameter of eccentric gap 3 may be the same or different, with It is all mutually best, eccentric gap 3 can be with spaced set, can not also spaced set.Between two adjacent eccentric notches 3 Spacing is preferably chosen between 0.1~20mm.

Example IV

It is arranged in often section detection cable on break-make type explosion early warning detection cable 4 and a pair of bursts early warning detection in break-make type 4 circumferencial direction of cable is in two eccentric gaps 3 of pairing relationship.So-called two eccentric gaps 3 in pairing relationship refer to two Two eccentric point b of eccentric cross section B1, B2 at a eccentric gap 3₁、b₂, it is located at break-make type explosion early warning detection cable 4 and justifies Circumferential direction using original centre of form O as in two centrosymmetric sector regions of symmetrical centre, as shown in figure 14, sector region Radian is 60 °.When eccentric gap 3 in 4 often section detection cable of break-make type explosion early warning detection cable matches setting, act on The drawing force of eccentric cross section B1, B2 on break-make type explosion early warning detection cable 4, corresponding eccentric point b₁、b₂The as centre of force, it is right The original centre of form O of break-make type explosion early warning detection cable 4 generates torque so that break-make type bursts on early warning detection cable 4 Position near eccentric cross section B1, B2 at the eccentric gap 3 and between eccentric cross section B1, B2 while stretching, with Single eccentric gap 3 is compared, and the bending of bigger can occur, further more sent out ahead of time or more easily at such eccentric cross section B1 or B2 Raw fracture, to make the warning sensitivity of break-make type explosion early warning detection cable 4 further increase.

Being described as more precisely of the so-called eccentric gap 3 at pairing relationship：With break-make type explosion early warning detection cable 4 Original centre of form O is the pole heart, with two eccentric point b Jing Guo eccentric cross section B1, B2₁、b₂In any point (such as eccentric point b₁) Ray Ox be polar axis, another eccentric point b₂Polar angle be more than or equal to 120 °, be less than or equal to 240 °, as shown in figure 15, Eccentric point b₂Polar angle closer to 180 °, the torque that pairing eccentric gap 3 generates break-make type explosion early warning detection cable 4 is got over Greatly, the bending degree of break-make type explosion early warning detection cable 4 is higher, is more conducive to improve break-make type explosion early warning detection cable 4 Warning sensitivity.The shape of the eccentric gap 3 of setting is matched on 4 often section detection cable of break-make type explosion early warning detection cable The specific choosing value of parameter (opening width, depth, shape, notch area ratio, eccentricity etc.) and spacing is with reference to embodiment one, logical In each section detection cable of disconnected type explosion early warning detection cable 4, or along 4 length direction of break-make type explosion early warning detection cable In each section detection cable, the formal parameter of eccentric gap 3 can be identical, can not also be identical, to be all mutually best, perpendicular pass The eccentric gap 3 of system can be with spaced set, can not also spaced set.Spacing between two adjacent eccentric gaps 3 Preferably chosen between 0.1~20mm.

Embodiment five

In example IV, a pair is set in pairing in often section detection cable on break-make type explosion early warning detection cable 4 The eccentric gap 3 of relationship is equally existed when break-make type explosion early warning detection cable 4 is mounted on the outer surface of protected object The problem of maximum possible established angle influences the warning sensitivity of break-make type explosion early warning detection cable 4, it is specific to influence implementing It is described in detail in example two, no longer repeats herein.In order to ensure the warning sensitivity of break-make type explosion early warning detection cable 4 and along length The consistency in direction, two pairs of setting is pre- in the explosion of break-make type in the often section detection cable of break-make type explosion early warning detection cable 4 The eccentric gap 3 of the 4 perpendicular relationship of circumferencial direction of police-spy's survey line cable, two eccentric gaps 3 per centering are in pairing relationship again, i.e., The pairing eccentric gap 3 of perpendicular relationship makes 4 one side of break-make type explosion early warning detection cable since eccentric gap is arranged in pairing 3, when stretching, its flexural deformation is big and break-make type explosion early warning detection cable 4 is made to be easily broken off；On the other hand, due to perpendicular The setting of relationship, maximum possible established angle is smaller, and the flexural deformation of protected object itself can more burst to break-make type Early warning detection cable 4 transmits.The superposition of both of the aforesaid factor makes break-make type explosion early warning detection cable 4 have preferably alarm Sensitivity and length direction consistency.

The pairing eccentric gap 3 of so-called perpendicular relationship, being described as more precisely：With break-make type explosion early warning detection cable 4 original centre of form O is the pole heart, and x-axis and y-axis is allowed to rotate four sector regions of positive and negative 15 ° of formation, in each sector region there are one The eccentric point of 3 corresponding eccentric cross section of eccentric gap, as shown in figure 16.In this case, the pre- police-spy no matter break-make type bursts How survey line cable 4 rotates in laid processes around the centre of form, and a section detects two in cable on break-make type explosion early warning detection cable 4 To in the eccentric gap 3 of pairing, always there is the corresponding established angle of two eccentric points in a pair of of pairing eccentric gap 3 to be less than or equal to 60 °, to make break-make type burst early warning detection cable 4 while with very high warning sensitivity, there is good length The consistency in direction.Vertical and pairing eccentric cross section B1, B1p, B2, B2p are in 4 length side of break-make type explosion early warning detection cable Upward distribution relation can be B1, B1p, B2, B2p successively, can also be B1, B2, B1p, B2p, more preferably with the former performance, such as Shown in Figure 17.

Two couple being arranged on 4 often section detection cable of break-make type explosion early warning detection cable is perpendicular and pairing relationship four The formal parameter (opening width, depth, shape, notch area ratio, eccentricity etc.) of a eccentric gap 3 and the specific choosing value of spacing With reference to embodiment one, in each section detection cable of break-make type explosion early warning detection cable 4, or along the pre- police-spy of break-make type explosion In each section detection cable of 4 length direction of survey line cable, the formal parameter of eccentric gap 3 can be identical, can not also be identical, with phase It is all best, the eccentric gap 3 of perpendicular relationship can be with spaced set, can not also spaced set.It is two adjacent inclined Spacing between heart notch 3 is preferably chosen between 0.1~20mm.

Embodiment six

In embodiment five, two vertical pairs are set in 4 often section detection cable of break-make type explosion early warning detection cable and are in Four eccentric gaps 3 of pairing relationship can in order to further increase the warning sensitivity of break-make type explosion early warning detection cable 4 It is realized, i.e., is arranged in circumference on every section detection cable by further decreasing the maximum possible established angle of eccentric gap 3 The n being about evenly arranged to (n be more than or equal to 3) a eccentric gap 3, corresponding eccentric cross section be B1, B2 ... Bn, B1p, B2p ... Bnp, eccentric point b₁、b₂、…bn、b₁p、b₂P ... bnp, eccentric point b₁And b₁p、b₂And b₂P ... bn and bnp are respectively at pairing The circumference of the circumferencial direction of break-make type explosion early warning detection cable 4 centered on original centre of form O is averagely divided into 2n by relationship The radian of sector region, each sector region is 180/n °, b₁、b₂、…bn、b₁p、b₂P ... each eccentric point such as bnp, each Only distribution one in a sector region.The boundary line of sector region divides equally where the optimum position of each eccentric point is distributed across On line, closer to bisector, the warning sensitivity of break-make type explosion early warning detection cable 4 is higher, and consistency is better.Allow one Eccentric point is just on the line of demarcation of two neighboring sector region, it is believed that the eccentric point belongs to two neighboring sector region Middle that sector region without other eccentric points.Also two eccentric points are allowed just to be on the line of demarcation of two sector regions, It is considered that two eccentric points are belonging respectively to two adjacent sector regions.Description more precisely is：In eccentric point b₁、b₂、… Bn, b₁p、b₂P ... between arbitrary two eccentric point in bnp, there is a strip area line of demarcation Ox, (area limit line Ox can lead to Cross eccentric point b₁、b₂... bn, b₁p、b₂P ... any point among bnp can not also pass through；Eccentric point b₁、b₂... bn, b₁p、b₂P ... allow have polar angle identical point among bnp, when there is polar angle identical point, the area limit line Ox necessary mistakes polar angle phase Same point), O is the original centre of form of break-make type explosion early warning detection cable 4, and using area limit line Ox as polar axis, original centre of form O is pole Point, eccentric point b₁、b₂... bn, b₁p、b₂P ... the polar angle of an eccentric point is more than or equal to 0 ° in bnp, is less than or equal to 180/n °； Eccentric point b₁、b₂... bn, b₁p、b₂P ... the polar angle of another eccentric point is more than or equal to 180/n ° in bnp, is less than or equal to 2 180/n°；Eccentric point b₁、b₂... bn, b₁p、b₂P ... the polar angle of third eccentric point is small more than or equal to 2180/n ° in bnp In equal to 3180/n °；The polar angle ... of 4th point bias；The polar angle of n-th eccentric point is more than or equal to 180/n ° of (N-1), Less than or equal to N180/n.As n=3, the position distribution of aforementioned each eccentric point is as shown in figure 18.It can from Figure 18 Go out, these eccentric points are all present in the sector region of the circumferencial direction of affiliated break-make type explosion early warning detection cable 4, and can On line of demarcation where being present in, also to allow on a certain line of demarcation, there are two eccentric points.

To ensure that 2n eccentric gap 3 is distributed in each sector region above-mentioned, can add by adjusting eccentric gap 3 Construction equipment is realized relative to the relative bearing of break-make type explosion early warning detection cable 4.For the 2n bias processed Notch 3 can find out area limit line by the method for iteration and judge whether these eccentric points meet in each region only It is distributed the principle of an eccentric point.So-called iterative method is exactly first to mark a certain section detection on break-make type explosion early warning detection cable 4 Each eccentric point is in the circumferential position that original centre of form O is the pole heart in cable, if there is the point of identical polar angle, then original centre of form O Line with the eccentric point is exactly line of demarcation, using the line as starting point, is 2n sector region circumference equal dividing, checks each fan Only whether there are one eccentric points in shape region；If there is no the identical point of polar angle, then by original centre of form O, first arbitrary one, picture is penetrated Line is 2n sector region circumference equal dividing using the ray as starting point, then centered on original centre of form O, rotates start ray And the line of demarcation of sector region then illustrates these partially until occurring only being distributed the situation of an eccentric point in each sector region Heart point meets the principle that an eccentric point is only distributed in each sector region.If no matter how to rotate aforementioned start ray and divide Boundary line cannot occur only being distributed the situation of an eccentric point in each sector region, then illustrate that these eccentric points are unsatisfactory for often The principle of an eccentric point is only distributed in one sector region.

By n in each section detection cable on the break-make type explosion early warning detection cable 4 of mentioned above principle setting to eccentric gap 3 2n eccentric gap 3, no matter how break-make type explosion early warning detection cable 4 reverses in laid processes, which detects cable In there is always the established angle at pairing relationship be less than or equal to 180/n ° of two eccentric gaps 3, i.e. break-make type bursts early warning detection The maximum possible established angle of cable 4 along its length is less than or equal to 180/n °, to ensure that break-make type explosion early warning detection line The warning sensitivity of cable 4 and consistency along its length.Theoretically, break-make type explosion early warning detection cable 4 above-mentioned The quantity of the eccentric point for meeting aforementioned setting principle of upper setting is more, i.e., n is bigger, and maximum possible established angle is smaller, break-make type The sensitivity higher of explosion early warning detection device 4, consistency are more preferable.But excessive setting quantity, processing on the one hand can be caused tired Hardly possible, processing charges high efficiency are low, and the minimum cross-section quantity being plastically deformed on the other hand can be caused more, and the explosion of break-make type is pre- The local elongation percentage of police-spy's survey line cable 4 increases, and the warning sensitivity of break-make type explosion early warning detection cable 4 declines instead.Practical system It is advisable no more than 5 with n in work.The formal parameter for 2n eccentric gap being arranged on break-make type explosion early warning detection cable 4 (is opened Mouth width degree, depth, shape, notch area ratio, eccentricity etc.) and spacing specific choosing value with reference to embodiment one, it is quick-fried in break-make type It splits in each section detection cable of early warning detection cable 4, or is visited along each section of 4 length direction of break-make type explosion early warning detection cable In survey line cable, the formal parameter of eccentric gap 3 can be identical, can not also be identical, be all mutually it is best, perpendicular relationship it is inclined Heart notch 3 can be with spaced set, can not also spaced set.Spacing between two adjacent eccentric gaps 3 is preferably 0.1 It is chosen between~20mm.

Eccentric cross section B1, B2 of pairing ... Bn, B1p, B2p ... Bnp, in 4 length of break-make type explosion early warning detection cable Distribution relation on direction can be successively B1, B1p, B2, B2p ... Bn, Bnp, can also be B1, B2 ... Bn, B1p, B2p ... Bnp, can also be (but not limited to) B1, B1p, B2 ... Bn, B2p ... Bnp more preferably with most the former performance such as schemes Shown in 19.

Embodiment seven

Break-make type provided in this embodiment explosion early warning detection device include above-mentioned break-make type explosion early warning detection cable 4 and The monitor box 1 being electrically connected with 4 both ends of break-make type explosion early warning detection cable.Monitor box 1 monitors the pre- police-spy of break-make type explosion in real time The on off operating mode of survey line cable 4, when break-make type explosion early warning detection cable 4 disconnects, monitor box 1 and alarm or by alarm signal Output outward.

Claims

The early warning detection cable 1. a kind of break-make type bursts, it is characterised in that：The described break-make type explosion early warning detection cable (4) with The mode of straight line or spiral is laid in protected pressure vessel or pressure pipeline outside wall surface, is as detection cable base material Metal or radio frequency silk upper edge detection cable base material length direction multiple eccentric gaps (3) are set and are made, break-make type Explosion early warning detection cable (4) is divided into the more piece detection cable for saving a length of L, is arranged in often section detection cable one or more eccentric Notch (3), so that the cross-sectional area on break-make type explosion detection cable (4) at eccentric gap (3) is less than eccentric gap (3) position The original cross-sectional area of the detection cable base material before eccentric gap (3) is not arranged for place.
The early warning detection cable 2. break-make type according to claim 1 bursts, it is characterised in that：The break-make type explosion is pre- Setting eccentric point is in break-make type explosion early warning detection cable (4) circumferencial direction in often section detection cable on police-spy's survey line cable (4) Two eccentric gaps (3) of vertical relation.
The early warning detection cable 3. break-make type according to claim 1 bursts, it is characterised in that：The break-make type explosion is pre- N eccentric gap (3) is set in often section detection cable on police-spy's survey line cable (4), wherein n is more than or equal to 3, n eccentric gap (3) Corresponding n eccentric point and each eccentric point amount to 2n point using original centre of form O as n central symmetry point of symmetrical centre It is uniformly distributed in break-make type explosion early warning detection cable (4) circumferencial direction.
The early warning detection cable 4. break-make type according to claim 1 bursts, it is characterised in that：The break-make type explosion is pre- Setting eccentric point is in break-make type explosion early warning detection cable (4) circumferencial direction in often section detection cable on police-spy's survey line cable (4) A pair of of eccentric gap (3) of pairing relationship.
The early warning detection cable 5. break-make type according to claim 1 bursts, it is characterised in that：The break-make type explosion is pre- Setting eccentric point is in break-make type explosion early warning detection cable (4) circumferencial direction in often section detection cable on police-spy's survey line cable (4) Two pairs of eccentric gaps (3) of vertical relation, two eccentric gaps (3) in each pair of eccentric gap (3) are in pairing relationship.
The early warning detection cable 6. break-make type according to claim 1 bursts, it is characterised in that：The break-make type explosion is pre- Setting eccentric point is equal in break-make type explosion early warning detection cable (4) circumferencial direction in often section detection cable on police-spy's survey line cable (4) 2n eccentric gap of even distribution, wherein n are more than or equal to 3.
The early warning detection cable 7. the break-make type according to any one of claim 1-6 bursts, it is characterised in that：Described When detecting cable base material using metallic conduction silk, the notch face on break-make type explosion early warning detection cable (4) at eccentric gap (3) Product is less than or equal to yield tensile ratio σ S/ σ b than A1/A0, is more than 0.01, wherein A1 is eccentric on break-make type explosion early warning detection cable (4) Smallest cross-section area at notch (3), A0 are the detection line not being arranged before eccentric gap (3) corresponding with minimum cross-section position The original cross-sectional area of cable base material, σ S, σ b are respectively the yield strength and tensile strength for detecting cable base material.
The early warning detection cable 8. the break-make type according to any one of claim 1-6 bursts, it is characterised in that：Described The long L of section of break-make type explosion early warning detection cable (4) is less than 6 δ and is more than 0.02 δ, and wherein δ is protected pressure vessel or pressure The wall thickness of pipeline.
The early warning detection cable 9. the break-make type according to any one of claim 1-6 bursts, it is characterised in that：Described The elongation percentage for detecting cable base material is more than 1.2%, is less than 100%.
10. a kind of detector using the break-make type explosion early warning detection cable described in any one of claim 1-9, special Sign is：The detector include break-make type explosion early warning detection cable (4) and with break-make type explosion early warning detection cable (4) The monitor box (1) of both ends electrical connection.